+0300006EN

EVD evolution twin
Driver for 2 electronic expansion valves
User manual
NO POWER
& SIGNAL
CABLES
TOGETHER
READ CAREFULLY IN THE TEXT!
Connected Efficiency
ENG
WARNINGS DISPOSAL
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production technology available on the market. CAREL INDUSTRIES and its 2003 and the related national legislation, please note that:
subsidiaries/affiliates nonetheless cannot guarantee that all the aspects 1. WEEE cannot be disposed of as municipal waste and such waste must be
of the product and the software included with the product respond to the collected and disposed of separately;
requirements of the final application, despite the product being developed 2. the public or private waste collection systems defined by local legislation must
according to start-of-the-art techniques. The customer (manufacturer, be used. In addition, the equipment can be returned to the distributor at
developer or installer of the final equipment) accepts all liability and risk the end of its working life when buying new equipment;
relating to the configuration of the product in order to reach the expected 3. the equipment may contain hazardous substances: the improper use or
results in relation to the specific final installation and/or equipment. incorrect disposal of such may have negative effects on human health
CAREL INDUSTRIES may, based on specific agreements, acts as a consultant and on the environment;
for the successful commissioning of the final unit/application, however in no 4. the symbol (crossed-out wheeled bin) shown on the product or on the
case does it accept liability for the correct operation of the final equipment/ packaging and on the instruction sheet indicates that the equipment has
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be downloaded, even prior to purchase, from the website www.carel.com.
Each CAREL INDUSTRIES product, in relation to its advanced level of Warranty on the materials: 2 years (from the date of production, excluding
technology, requires setup/configuration/programming/commissioning consumables).
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The failure to complete such operations, which are required/indicated in the Approval: the quality and safety of CAREL INDUSTRIES products are
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accepts no liability in such cases. Only qualified personnel may install or carry
out technical service on the product. The customer must only use the product
in the manner described in the documentation relating to the product.
In addition to observing any further warnings described in this manual, the

following warnings must be heeded for all CAREL INDUSTRIES products:
• prevent the electronic circuits from getting wet. Rain, humidity and all
types of liquids or condensate contain corrosive minerals that may damage
the electronic circuits. In any case, the product should be used or stored
in environments that comply with the temperature and humidity limits
specified in the manual;
• do not install the device in particularly hot environments. Too high
temperatures may reduce the life of electronic devices, damage them and
deform or melt the plastic parts. In any case, the product should be used
or stored in environments that comply with the temperature and humidity
limits specified in the manual;
• do not attempt to open the device in any way other than described in the
manual;
• do not drop, hit or shake the device, as the internal circuits and mechanisms
may be irreparably damaged;
• do not use corrosive chemicals, solvents or aggressive detergents to clean
the device;
• do not use the product for applications other than those specified in the
technical manual.
All of the above suggestions likewise apply to the controllers, serial boards,
programming keys or any other accessory in the CAREL INDUSTRIES product
portfolio. IMPORTANT: Separate as much as possible the probe and digital input cables
CAREL INDUSTRIES adopts a policy of continual development. Consequently, from the cables to inductive loads and power cables to avoid possible
CAREL INDUSTRIES reserves the right to make changes and improvements to electromagnetic disturbance.
any product described in this document without prior warning. Never run power cables (including the electrical panel cables) and signal
The technical specifications shown in the manual may be changed without cables in the same conduits
prior warning.
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3 “EVD Evolution TWIN” +0300006EN - rel. 2.10 - 24.01.2024

ENG
Contents
1. INTRODUCTION 7 8. TABLE OF PARAMETERS 35

1.1 Models .................................................................................................................7 8.1 Table of parameters, driver A...............................................................35
1.2 Main functions and features ...................................................................7 8.2 Table of parameters, driver B ...............................................................40
8.3 Unit of measure ...........................................................................................45
2. INSTALLATION 9 8.4 Variables accessible via serial connection – driver A............46
2.1 DIN rail assembly and dimensions......................................................9 8.5 Variables accessible via serial connection – driver B ............47
2.2 Description of the terminals ...................................................................9 8.6 Variables used based on the type of control.............................48
2.3 Connection diagram - superheat control ......................................9
2.4 Installation.......................................................................................................10
9. ALARMS 49
2.5 Valve operation in parallel and complementary mode......10 9.1 Alarms ................................................................................................................49
2.6 Shared pressure probe ............................................................................11 9.2 Alarm relay configuration......................................................................50
2.7 Connecting the USB-tLAN converter .............................................11 9.3 Probe alarms ..................................................................................................51
2.8 Connecting the module EVBAT00400 ...........................................12 9.4 Control alarms ..............................................................................................51
2.9 Connecting the USB/RS485 converter ..........................................12 9.5 EEV motor alarm..........................................................................................52
2.10 Upload, Download and Reset parameters (display) .............12 9.6 LAN error alarm ............................................................................................52
2.11 Display electrical connections (display) .......................................12
10. TROUBLESHOOTING 53
2.12 General connection diagram ..............................................................13
3. USER INTERFACE 14 11. TECHNICAL SPECIFICATIONS 55

3.1 Assembling the display board (accessory)......................................14
12. APPENDIX 1: VPM (VISUAL PARAMETER
3.2 Display and keypad ...................................................................................14
MANAGER) 56
3.3 Switching between drivers (display) ..............................................15
3.4 Display mode (display) ............................................................................15 12.1 Installation .....................................................................................................56
3.5 Programming mode (display)............................................................15 12.2 Programming (VPM) .................................................................................56
12.3 Copying the setup ....................................................................................57
4. COMMISSIONING 16 12.4 Setting the default parameters ..........................................................57
4.1 Commissioning............................................................................................16 12.5 Updating the controller and display firmware .........................57
4.2 Setting the pLAN network address .................................................16
13. APPENDIX 2: EVD EVOLUTION SINGLE 58
4.3 Guided commissioning procedure (display) .............................17
4.4 Checks after commissioning ...............................................................19 13.1 Enable single mode on twin ...............................................................58
4.5 Other functions............................................................................................19 13.2 User interface – LED card ......................................................................58
13.3 Connection diagram - superheat control ...................................58
5. CONTROL 20 13.4 Parameters enabled/disabled for control....................................58
5.1 Main control...................................................................................................20 13.5 Programming with the display ..........................................................59
5.2 Superheat control ......................................................................................20 13.6 Auxiliary refrigerant ...................................................................................59
5.3 Control with Emerson Climate Digital Scroll ™ 13.7 S3 e S4 inputs................................................................................................59
compressor.....................................................................................................22 13.8 Main control – additional functions ...............................................59
5.4 Special control ..............................................................................................22 13.9 Auxiliary control .........................................................................................60
5.5 Programmable control ............................................................................25 13.10 Variables used based on the type of control ...........................63
5.6 Control with refrigerant level sensor ..............................................27
6. FUNCTIONS 28
6.1 Power supply mode ..................................................................................28
6.2 Battery charge delay .................................................................................28
6.3 Network connection ................................................................................28
6.4 Inputs and outputs ....................................................................................28
6.5 Control status ...............................................................................................30
6.6 Special control status ...............................................................................32
7. PROTECTORS 33
7.1 Protectors ........................................................................................................33

ENG
1. INTRODUCTION
EVD evolution twin is a controller featuring two drivers for double pole 1.1 Models
stepper motors that independently manages two electronic expansion
valves. It is designed for DIN rail assembly and is fitted with plug-in screw Code Description
terminals. Each driver controls refrigerant superheat and optimises the EVD0000T00 EVD evolution twin universal (tLAN)
efficiency of the refrigerant circuit, guaranteeing maximum flexibility, being EVD0000T01 EVD evolution twin universal (tLAN) pack of 10 pcs. (*)
compatible with various types of refrigerants and valves, in applications with EVD0000T10 EVD evolution twin universal (pLAN)
chillers, air-conditioners and refrigerators, the latter including subcritical and EVD0000T11 EVD evolution twin universal (pLAN) pack of 10 pcs. (*)
transcritical CO2 systems. It features low superheat (LowSH), high evaporation EVD0000T20 EVD evolution twin universal (RS485/Modbus®)
pressure (MOP), and low evaporation pressure (LOP) protection, and can EVD0000T21 EVD evolution twin universal (RS485/Modbus®) pack of 10
manage, as an alternative to superheat control, special functions such as pcs. (*)
the hot gas bypass, evaporator pressure regulation (EPR) and control of the EVD0000T30 EVD evolution twin for Carel valves (tLAN)
valve downstream of the gas cooler in transcritical CO2 circuits. The controller EVD0000T31 EVD evolution twin for Carel valves (tLAN) pack of 10 pcs. (*)
can drive an electronic expansion valve in a refrigerant circuit with Digital EVD0000T40 EVD evolution twin for Carel valves (pLAN)
Scroll compressor, if integrated with a specific CAREL controller via LAN. In EVD0000T41 EVD evolution twin for Carel valves (pLAN) pack of 10 pcs. (*)
addition, it features adaptive control that can evaluate the effectiveness of EVD0000T50 EVD evolution twin for Carel valves (RS485/Modbus®)
superheat control and if necessary activate one or more tuning procedures. EVD0000T51 EVD evolution twin for Carel valves (RS485/Modbus®) pack
As regards network connectivity, the controller can be connected to either of of 10 pcs. (*)
EVDCON0021 EVD Evolution, connector kit (10pcs) for multi-pack(*)
the following:
• a pCO programmable controller to manage the controller via pLAN, tLAN Tab. 1.a
and RS485/Modbus®; (*) The codes with multiple packages are sold without connectors, available
• a PlantVisorPRO supervisor via RS485/Modbus®. In this case, On/Off control separately in code EVDCON0021.
is performed via digital input 1 for driver A and via digital input 2 for driver
B, if suitably configured. As well as regulation start/stop, digital inputs 1 and
2 can be configured for the following:
- valve regulation optimization after defrost;
1.2 Main functions and features
- valve forced open (at 100%); In summary:
- regulation backup; • electrical connections by plug-in screw terminals;
- regulation security. • serial card incorporated in the controller, based on the model (tLAN, pLAN,
The last two possibilities refer to the behaviour of the driver when there is no RS485/Modbus®);
communication over the pLAN or tLAN, RS485/Modbus® network (see chap. • compatibility with various types of valves (“universal” models only) and
6). refrigerants;
Another possibility involves operation as a simple positioner with 4 to 20 mA • activation/deactivation of control via digital input 1 for driver A and digital
or 0 to 10 Vdc analogue input signal for driver A (inputs S1 and S2 respectively) input 2 for driver B, if suitably configured, or remote control via LAN, from
and with 4 to 20 mA signal for driver B (input S3). EVD evolution twin comes pCO programmable controller;
with a LED board to indicate the operating status, or a graphic display • superheat control with protection functions for low superheat LowSH,
(accessory) that can be used to perform installation, following a guided MOP, LOP;
commissioning procedure involving setting just 4 parameters for each driver: • adaptive superheat control;
refrigerant, valve, pressure sensor, type of main control (chiller, showcase, etc.). • function to optimise superheat control for air-conditioning units fitted
The procedure can also be used to check that the sensor and valve motor with Emerson Climate Technologies Digital Scroll compressor. In this case,
wiring is correct. Once installation is complete, the display can be removed, EVD Evolution twin must be connected to a CAREL pCO series controllers
as it is not necessary for the operation of the controller, or alternatively kept running an application program that can manage units with Digital Scroll
in place to display the significant system variables, any alarms and when compressors. This function is only available on the controllers for CAREL
necessary set the control parameters. The controller can also be setup using valves;
a computer via the service serial port. In this case, the VPM program (Visual • configuration and programming by display (accessory), by computer
Parameter Manager) needs to be installed, downloadable from http://ksa. using the VPM program or by PlantVisor/PlantVisorPro supervisor and pCO
carel.com, and the USB-tLAN converter EVDCNV00E0 connected. Only on programmable controller;
RS485/Modbus® models can installation be managed as described above by • commissioning simplified by display with guided procedure for setting the
computer, using the serial port (see paragraph 2.9) in place of the service serial parameters and checking the electrical connections;
port. The “universal” models can drive all types of valves, while the “CAREL” • multi-language graphic display, with “help” function on various parameters;
models only drive CAREL valves. • management of different units of measure (metric/imperial);
• parameters protected by password, accessible at a service (installer) and
manufacturer level;
• copy the configuration parameters from one EVD evolution twin controller
to another using the removable display;
• ratiometric or electronic 4 to 20 mA pressure transducer, the latter can be
shared between up to 5 drivers (maximum 2 EVD evolution twins + 1 EVD
Evolution), useful for multiplexed applications;
• 4 to 20 mA or 0 to 10 Vdc input to use the controller as a positioner
controlled by an external signal;
• management of power failures with valve closing (only for controllers with
24 Vac power supply connected to EVD0000UC0 accessory);
• advanced alarm management.
For software versions higher than 4.0, the following new functions have been
introduced:
• 24 Vac or 24 Vdc power supply, in the latter case without valve closing in
the event of power failures;
• pre-position time settable by parameter;
• use of digital to start/stop control when there is no communication with
the pCO programmable controller.

ENG
Starting from software revision 5.0 and higher, new functions have been Ultracap module (P/N EVD0000UC0)
introduced: The module, mounted on DIN rail, guarantees temporary power to the
• management of new refrigerants; driver in the event of power failures, for enough time to immediately close
• valve position in standby settable by parameter; the connected electronic valves (one or two). It avoids the need to install a
• operation as EVD Evolution with single driver: the driver controls one solenoid valve. The module is made using Ultracap storage capacitors, which
expansion valve only (valve A), however it acquires new functions available ensure reliability in terms of much longer component life than a module
using probes S3 and S4: made with lead batteries. In just 4 minutes the module is ready to power two
1. electronic valve control in a refrigerant circuit with BLDC compressor, Carel valves again (or 5 minutes for pairs or other brand valves).
controlled by CAREL Power+ speed driver (with inverter);
2. superheat control with two temperature probes;
3. auxiliary control functions:
- backup probes S3 and S4;
- subcooling measurement;
- high condensing temperature protection (HiTcond);
- modulating thermostat;
- subcooling measurement;
- reverse high condensing temperature protection;
- possibility to manage CO2 (R744) cascade systems, setting the
refrigerant for the primary and secondary circuit.
New functions have been introduced with software revision 5.4 and higher: Fig. 1.c
• programmable control, both superheat and special, and programmable
positioner: these functions exploit CAREL’s technology and know-how in Valve cable E2VCABS*00 (IP67)
terms of control logic;
Shielded cable with built-in connector for connection to the valve motor. The
• custom refrigerant selection; connector code E2VCON0000 (IP65) can also be purchased on its own, to be
• control with level sensor for flooded evaporator; wired.
• control with level sensor for flooded condenser.
From the software revision following the 7.2-7.3 new features have been
introduced, including:
• battery charge delay;
• external signal 0 ... 5 V (for programmable positioner).
Series of accessories for EVD evolution twin

Display (code EVDIS00**0)
Easily applicable and removable at any time from the front panel of the controller, Fig. 1.d
during normal operation displays all the significant variables for system A and B,
the status of the relay outputs and recognises the activation of the protection Float level sensor (P/N LSR0013000)
functions and alarms. During commissioning, it guides the installer in setting the The level sensor measures the quantity of refrigerant in the heat exchanger.
parameters required to start the installations and, once completed, can copy the This is used when controlling the valve based on the liquid level in the flooded
parameters to other EVD evolution twin controllers. The models differ in the first evaporator or condenser. Available with threaded or flanged connector.
settable language, the second language for all models is English. EVDIS00**0 can
be used to configure and monitor all the control parameters for both drivers,
accessible via password at a service (installer) and manufacturer level.
Fig. 1.e
Fig. 0.a Float level sensor (P/N LSR0013000)

The level sensor measures the quantity of refrigerant in the heat exchanger.
USB/tLAN converter (code EVDCNV00E0) This is used when controlling the valve based on the liquid level in the flooded
The USB-tLAN converter is connected, once the LED board cover has been evaporator or condenser. Available with threaded or flanged connector.
removed, to the service serial port underneath. Fitted with cables and
connectors, it can connect EVD evolution twin directly to a computer, which,
using the VPM program, can configure and program the controller. VPM can
also be used to update the controller and display firmware. See the appendix.
Fig. 1.a
USB/RS485 converter (code CVSTDUMOR0)
The converter is used to connect the configuration computer and the EVD
evolution twin controllers, for RS485/Modbus ® models only. Fig. 1.f
Fig. 1.b
“EVD Evolution TWIN” +0300006EN - rel. 2.10 - 24.01.2024 8
ENG
2. INSTALLATION
2.1 DIN rail assembly and dimensions 2.3 Connection diagram - superheat control
EVD evolution twin is supplied with screen-printed connectors to simplify
wiring. CAREL EXV CAREL EXV
VALVE B VALVE A
VBAT
COM 1
NO 1
G0
G
1 3 2 4
Power Supply E X V connection Relay
EVD evolution 4 14 15
S
1 A
110 45 2
3
twin shield
shield
13
COMA
NOA
VBAT
G0
1 3 2 4
G
16
Analog – Digital Input Network
V REF
GND
DI1
DI2
COMB
S1
S2
S3
S4
NOB
GND Tx/Rx 1 3 2 4
70 49 EVD evolution NET S

B
230 Vac 24 Vac
60 OPEN A OPEN B
17 18
2 AT CLOSE A CLOSE B
35 VA
twin
G0
G
Fig. 2.a TRADRFE240 A B
2.2 Description of the terminals 5

Analog - Digital Input Network
VREF
GND
DI1
DI2
S1
S4
S2
S3
GND Tx/Rx
VBAT
NO A1
G0
G
1 3 2 4
COM A
EVDCNV00E0
Power Supply EX V connection A Relay A
EVD4 service USB adapter
1 3 2 4
COM B
4
NO B
EVD4
PC
EEV driver
E X V connection B Relay B 11
6
EVD evolution 7 8 9 10 12
aa Fig. 2.c
Key:
twin 1
2
3
green
yellow
brown
4 white
5 personal computer for configuration
Analog – Digital Input Network 6 USB/tLAN converter
7 ratiometric pressure transducer–evaporation pressure driver A
V REF
GND
DI1
DI2
S1
S2
S3
S4
GND Tx/Rx 8 NTC – suction temperature driver A

9 ratiometric pressure transducer–evaporation pressure driver B
b 10 NTC – suction temperature driver B
11 digital input 1 configured to enable control driver A
Fig. 2.b 12 digital input 2 configured to enable control driver B
Terminal Description 13 voltage-free contact driver A (up to 230 V)
G,G0 Power supply 14 solenoid valve A
VBAT Emergency power supply 15 alarm signal A
Functional earth 16 voltage-free contact driver B (up to 230 V)
17 solenoid valve B
1,3,2,4: ExV Stepper motor power supply driver A 18 alarm signal B
connection A
COM A, NO A Alarm relay driver A
1,3,2,4: ExV Stepper motor power supply driver B
connection B Note:
COM B, NO B Alarm relay driver B • connect the valve cable shield to the electrical panel earth;
GND Signal ground • the use of driver A for superheat control requires the use of the evaporation
VREF Power supply to active probes pressure probe S1 and the suction temperature probe S2, which will be
S1 Probe 1 (pressure) or 4 to 20mA external signal fitted after the evaporator, and digital input 1 to enable control. As an
S2 Probe 2 (temperature) or 0 to 10 V external signal alternative to digital input 1, control can be enabled via remote signal
S3 Probe 3 (pressure) or 4 to 20mA external signal (tLAN, pLAN, RS485/ModBus®). For the positioning of the probes relating to
S4 Probe 4 (temperature) other applications, see the chapter on “Control”;
DI1 Digital input 1 • the use of driver B for superheat control requires the use of the evaporation
DI2 Digital input 2 pressure probe S3 and the suction temperature probe S4, which will be
Terminal for tLAN, pLan, RS485/ModBus® connection fitted after the evaporator, and digital input 2 to enable control. As an
Terminal for tLAN, pLan, RS485/ModBus® connection alternative to digital input 2, control can be enabled via remote signal
Terminal for pLan, RS485/ModBus® connection (tLAN, pLAN, RS485/ModBus®). For the positioning of the probes relating to
other applications, see the chapter on “Control”;
aa service serial port (remove the cover for access) • inputs S1, S2, S3 & S4 are programmable and the connection to the
b serial port terminals depends on the setting of the parameters. See the chapters on
Tab. 2.a “Commissioning” and “Functions”;

ENG
• pressure probes S1 & S2 in the diagram are ratiometric. See the general
connection diagram for the other electronic probes, 4 to 20 mA or Important: earthing G0 and G on a driver connected to a serial
combined; network will cause permanent damage to the driver.
• the pressure probes S1 and S3 must be of the same type.
24 Vac 24 Vac
230 Vac 230 Vac
2 AT
2.4 Installation 2 AT
For installation proceed as follows, with reference to the wiring diagrams: NO !

1. connect the probes: the probes can be installed a maximum distance of
1
3
2
4
COMA
NOA
G
G0
VBAT
1
3
2
4
COMA
NOA
G
G0
VBAT
10 metres away from the driver, or a maximum of 30 metres as long as
shielded cables with a minimum cross-section of 1 mm² are used;
2. connect any digital inputs, maximum length 30 m; pCO
3. connect the power cable to the valve motors: use 4-wire shielded cable
AWG 22 Lmax=10 m or AWG 14 Lmax=50m; failure to connect the valve Fig. 2.g
motors after connecting the controller will generate the “EEV motor error”
alarm: see paragraph 9.5;
4. carefully evaluate the maximum capacity of the relay outputs specified in the Installation environment
chapter “Technical specifications”;
5. if necessary, use a class 2 safety transformer with suitable short-circuit and Important: avoid installing the controller in environments with the
overload protection. For the power ratings of the transformer see the following characteristics:
general connection diagram and the technical specifications; • relative humidity greater than the 90% or condensing;
6. the connection cables must have a minimum cross-section of 0.5 mm2; • strong vibrations or knocks;
7. power up the controller: for 24 Vdc power supply the controller will close the • exposure to continuous water sprays;
valves; • exposure to aggressive and polluting atmospheres (e.g.: sulphur and
ammonia fumes, saline mist, smoke) to avoid corrosion and/or oxidation;
Important: for 24 Vdc power supply, set “Power supply mode” • strong magnetic and/or radio frequency interference (avoid installing the
parameter=1 to start control. See par. 6.1 appliances near transmitting antennae);
• exposure of the controller to direct sunlight and to the elements in general.
Drivers in a serial network
Case 1: multiple controllers connected in a network powered by the same Important: When connecting the controller, the following warnings
transformer. Typical application for a series of controllers inside the same must be observed:
electrical panel • if the controller is not used as specified in this user manual, the protection
indicated is not guaranteed;
• incorrect connection to the power supply may seriously damage the
controller;
230 Vac
24 Vac
• use cable ends suitable for the corresponding terminals. Loosen each
2 AT 2 AT 2 AT
screw and insert the cable ends, then tighten the screws and lightly tug
the cables to check correct tightness;
COMA
COMA
VBAT
COMA
NOA
VBAT
NOA
• separate as much as possible (at least 3 cm) the probe and digital
VBAT
NOA
G0
G0
G
1
3
2
4
G0
1
3
2
4
G
1
3
2
4
pCO
input cables from the power cables to the loads so as to avoid possible
electromagnetic disturbance. Never lay power cables and probe cables in
the same conduits (including those in the electrical panels;
Fig. 2.d • install the shielded valve motor cables in the probe conduits: use shielded
valve motor cables to avoid electromagnetic disturbance to the probe
Case 2: multiple controllers connected in a network powered by different cables;
transformers (G0 not connected to earth). Typical application for a series of • avoid installing the probe cables in the immediate vicinity of power devices
controllers in different electrical panels. (contactors, circuit breakers, etc.). Reduce the path of the probe cables as
much as possible and avoid enclosing power devices;
• avoid powering the controller directly from the main power supply in the
230 Vac 230 Vac 230 Vac panel if this supplies different devices, such as contactors, solenoid valves,
24 Vac 24 Vac 24 Vac etc., which will require a separate transformer.
2 AT 2 AT
2 AT
• * EVD EVO is a control to be incorporated in the end equipment, do not
COMA
COMA
VBAT
NOA
COMA
VBAT
NOA
VBAT
NOA
G0
use for flush mount

G0
1
3
2
4
G0
1
3
2
4
G
1
3
2
4
pCO
• * DIN VDE 0100: Protective separation between SELV circuit and other
circuits must be guaranteed. The requirements according to DIN VDE 0100
must be fulfilled. To prevent infringement of the protective separation
Fig. 2.e (between SELV circuit to other circuits) an additional fixing has to be
provided near to the terminals. This additional fixing shall clamp the
Case 3: multiple controllers connected in a network powered by different insulation and not the conductor”.
transformers with just one earth point. Typical application for a series of
controllers in different electrical panels.
2.5 Valve operation in parallel and

230 Vac 230 Vac 230 Vac
24 Vac 24 Vac 24 Vac complementary mode

2 AT 2 AT
2 AT EVD evolution twin can control two CAREL valves connected together (see
COMA
COMA
paragraph 4.2), in parallel mode, with identical behaviour, or in complementary

VBAT
NOA
COMA
VBAT
NOA
VBAT
NOA
G0
G0
1
3
2
4
G
1
3
2
4
G0
G
1
3
2
4
pCO mode, whereby if one valve opens, the other closes by the same percentage.
To achieve such behaviour, simply set the “valve” parameter (“Two EXV
connected together”) and connect the valve motor power supply wires to
the same connector. In the example shown below, for operation of valve B_2
Fig. 2.f
with valve B_1 in complementary mode simply swap the connection of wires
1 and 3.

ENG
2 CAREL valves connected 2 CAREL valves connected in 2.7 Connecting the USB-tLAN converter
in parallel mode complementary mode
Procedure:
CAREL EXV
• remove the LED board cover by pressing on the fastening points;
CAREL EXV
VALVE A_1 VALVE B_1
• plug the adapter into the service serial port;
• connect the adapter to the converter and then this in turn to the computer
4 4 • power up the controller
2 2
3 3 press
1 1
CAREL EXV CAREL EXV EVD evo

lut ion
VALVE A_2 VALVE B_2 OPEN
4 4
CLOS
E
2 2
3 1
1 3
press
1 3 2 4 1 3 2 4 Fig. 2.j
Fig. 2.h
VBAT
G0
COMA
NOA
G
1 3 2 4
Important: in the case of installations with four valves, the EVD0000UC0

module cannot guarantee all four will close in the event of power failures.
COMB
NOB
1 3 2 4
4 NET
Note: operation in parallel and complementary mode can only be 1
used for CAREL valves, within the limits shown in the table below, where OK OPEN A OPEN B
means that the valve can be used with all refrigerants at the rated operating
CLOSE A CLOSE B
pressure. EVDCNV00E0 EVD evolution
A B
TWIN
Model of CAREL valve EVD4 service USB adapter
4
EVD4
E2V E3V E4V E5V E6V E7V PC
EEV driver
2
Two EXV OK E3V45, MOPD=35bar E4V85, MOPD=22bar NO NO NO Analog - Digital Input Network
con- E3V55, MOPD=26bar E4V95, MOPD=15bar 3
VREF
GND
DI1
DI2
S1
S4
S2
S3
GND Tx/Rx
nected E3V65, MOPD=20bar
together
Tab. 2.b
Fig. 2.k
Nota: MOPD = Maximum Operating-Pressure Differential Key:
1 service serial port
2 adapter
3 USB/tLAN converter
4 personal computer
2.6 Shared pressure probe
Only 4 to 20 mA pressure probes (not ratiometric) can be shared. The probe
can be shared by a maximum of 5 drivers. For multiplexed systems where Note: when using the service serial port connection, the VPM program
twin1, twin2 and twin 3 controllers share the same pressure probe, choose the can be used to configure the controller and update the controller and display
normal option for driver A on the twin 1 controller and the “remote” option for firmware, downloadable from http://ksa.carel.com. See the appendix.
the other drivers. Driver B on the twin3 controller must use another pressure
probe, P2.
Example
twin1 twin2 twin3
Probe S1 -0.5 to 7 barg (P1) remote, -0.5 to 7 barg remote,
(driver A) -0.5 to 7 barg
Probe S3 remote, -0.5 to 7 barg remote, -0.5 to 7 barg -0.5 to 7 barg (P2)
(driver B)
Tab. 2.c
TWIN 1 TWIN 2 TWIN 3

VREF
VREF
VREF
GND
GND
GND
DI1
DI1
DI2
DI2
DI1
DI2
S1
S1
S4
S4
S2
S2
S1
S3
S3
S4
S2
S3
GND Tx/Rx GND Tx/Rx GND Tx/Rx
P1 P2
Fig. 2.i
Key:
P1 shared pressure probe
P2 pressure probe

ENG
2.8 Connecting the module EVBAT00400 2.10 Upload, Download and Reset parameters
The EVBAT00400 module can close the valve in the event of power failures. (display)
Digital input 1/2 can be configured to detect the “Discharged battery” alarm. Procedure:
1. press the Help and ENTER buttons together for 5 seconds;
2. a multiple choice menu will be displayed, use UP/DOWN to select the
required procedure;
VBAT
EVBAT00500
G0
G
3. confirm by pressing ENTER;
EVD Battery module 4. the display will prompt for confirmation, press ENTER;
EVBAT00400 5. at the end a message will be shown to notify the operation if the operation
4 AT was successful.
BAT ERR
GND
• UPLOAD: the display saves all the values of the parameters on the source
+
- controller;
• DOWNLOAD: the display copies all the values of the parameters to the
target controller;
• RESET: all the parameters on the controller are restored to the default
values.
• See the table of parameters in chapter 8.
VBAT
G0
G
EVD evolution JEAD69

TWIN 9DLCAD69
G:H:I
GND
DI1
DI2
Fig. 2.n
230 Vac 24 Vac
Important:
35 VA 2 AT
• the procedure must be carried out with controller/controllers powered;
TRADRFE240
• DO NOT remove the display from the controller during the UPLOAD,
Fig. 2.l DOWNLOAD, RESET procedure;
• the parameters cannot be downloaded if the source controller and the
target controller have incompatible firmware;
Note: set the “Battery charge delay” parameter, depending on the
application. See the chapter “Functions”.
• the parameters cannot be copied from driver A to driver B.
2.9 Connecting the USB/RS485 converter

Only on EVD evolution twin RS485/Modbus® models can the configuration 2.11 Display electrical connections (display)
computer be connected using the USB/RS485 converter and the serial port,
To display the probe and valve electrical connections for drivers A and B, enter
according to the following diagram:
display mode. See paragraph 3.4
G0
VBAT
COMA
NOA
G
1 3 2 4
COMB
NOB
1 3 2 4
NET
OPEN A OPEN B
CLOSE A CLOSE B 1
EVD evolution
A B
TWIN

VREF
GND
DI1
DI2
S1
S4
S2
S3
GND Tx/Rx
shield 2
Fig. 2.m
Key:
1 personal computer for configuration
2 USB/RS485 converter
Note:
• the serial port can be used for configuration with the VPM program and for
updating the controller firmware, downloadable from http://ksa.carel.com;
• to save time, up to 8 controllers EVD evolution twin can be connected to
the computer, updating the firmware at the same time (each controller
must have a different network address).

ENG
2.12 General connection diagram
G ALCO
G0 Sporlan DANFOSS
SEI / SEH ETS / CCMT EX5/6
VBAT EX7/8
X / SER
CAREL E V CAREL EXV
VALVE B VALVE A 1 1
green 1
green 22
blue
3 20
red 20
red 3
brown
2 2 21
black 4
white 4
white
4 4
white 21
black 21
black
COMx
NOx
1
A 4 18 19
S
1 A
2
VBAT
3
G0
G
shield shield
EVD 17
ULTRACAP
COMA
VBAT
G0
NOA
G
1 3 2 4
14
with battery
COMB
NOB
1 3 2 4
230 Vac 24 Vac NET S

B
2 AT
VBAT
OPEN A OPEN B
G0
G
35 VA 15 16
TRADRFE240
EVD evolution CLOSE A CLOSE B
A B
TWIN
without battery
Tx/Rx
GND
230 Vac 24 Vac pCO
2 AT
35 VA
G0
G
shield
TRADRFE240 Analog - Digital Input Network
VREF
GND
GND
DI1
DI2
pCO
S1
S4
S2
S3
GND Tx/Rx
5
EVDCNV00E0
shield
EVD4 service USB adapter
4
GND
EVD4
PC
EEV driver
7 pCO
Modbus®
6 12
shield
RS485
23
22
VREF
9 10 11 13
VREF
EVD0000T0*: tLAN version

GND
B
GND
C 8
DI1
DI2
DI1
DI2
S1
S4
S2
S1
S3
S4
S2
S3
GND Tx/Rx GND Tx/Rx EVD0000T3*: tLAN version

EVD0000T1*: pLAN version
3 4 EVD0000T4*: pLAN version CVSTDUM0R0
1 4 EVD0000T2*: RS485 version
21 EVD0000T5*: RS485 version
VREF
VREF
F
GND
GND
L
DI1
DI1
DI2
DI2
S1
S4
S1
S2
S4
S3
S2
S3
GND Tx/Rx GND Tx/Rx
1
1 4
VREF
GND
D
DI1
DI2
20
S1
S4
2
S2
S3
GND Tx/Rx 21 20
VREF
GND
DI1
DI2
S1
S4
S2
S3
GND Tx/Rx
E
Fig. 2.o
Key:
1 green 21 black
2 yellow 22 computer for configuration/supervision
3 brown
4 white A Connection to EVD0000UC0
5 computer for configuration B Connection to ratiometric pressure transducer (SPKT00**R0)
6 USB/tLAN converter C Connection to electronic pressure probe (SPK**0000) or piezoresistive
7 adapter pressure transducer (SPKT00*C00)
8 ratiometric pressure transducer driver A D Connection as positioner (4 to 20 mA input)
9 NTC probe driver A E Connection as positioner (0 to 10 Vdc input)
10 ratiometric pressure transducer driver B F Connection to combined pressure/temperature probe (SPKP00**T0)
11 NTC probe driver B L Connection to Float level sensor (cod. LSR00*3000)
12 digital input 1 configured to enable driver A control The maximum length of the connection cable to the EVD0000UC0 module
13 digital input 2 configured to enable driver B control 1 is 5 m.
14 voltage-free contact (up to 230 Vac) driver B The connection cable to the valve motor must be 4-wire shielded, AWG 22
15 solenoid valve driver B 2 Lmax= 10 m or AWG14 Lmax= 50 m.
16 alarm signal driver B
17 voltage-free contact (up to 230 Vac) driver A
18 solenoid valve driver A
19 alarm signal driver A
20 red

ENG
3. USER INTERFACE
The user interface consists of 8 LEDs that display the operating status, as 3.2 Display and keypad
shown in the table:
The graphic display shows two variables for each driver (A, B), the control
status of the driver, activation of the protectors, any alarms and the status of
VBAT
COM 1
NO 1
G0
G
1 3 2 4
Power Supply E X V connection Relay the relay output.
7
1 Surriscaldam. ON
4.9 K A/B
EVD
6
MOP
evolution
Apertura T 5
2 valvola ALARM
44 % -- Rele 4
twin 3
8
Fig. 3.c
Key:
V REF
GND
DI1
DI2
S1
S2
S3
S4
GND Tx/Rx
1 variable 1 on the display (driver A/B)

Fig. 3.a 2 variable 2 on the display (driver A/B)
Key: 3 relay status (driver A/B)
LED On Off Flashing 4 alarm (press “HELP”)
NET Connection active No Communication error 5 protector activated
6 control status
connection
7 current display: driver A/driver B
OPEN A/B Opening valve A/B - Driver A/B disabled (*)
8 adaptive control in progress
CLOSE A/B Closing valve A/B - Driver A/B disabled (*)
OPEN B/ - - EVD Evolution TWIN
CLOSE B operating as single
driver Messages on the display
A B Active alarm driver A/B - - Control status Active protection
/ ON Operation LowSH Low superheat
Controller powered Controller off Wrong power supply OFF Standby LOP Low evaporation
(see chap. on Alarms) temperature
Tab. 3.a POS Positioning MOP High evaporation
(*) Awaiting completion of the initial configuration temperature
WAIT Wait HiTcond High condensing
temperature
CLOSE Closing
INIT Valve motor error recognition
3.1 Assembling the display board (accessory) procedure (*)
The display board, once installed, is used to perform all the configuration and TUN Tuning in progress
programming operations on the two drivers. It displays the operating status, Tab. 3.b
the significant values for the type of control that the drivers are performing (*) The valve motor error recognition procedure can be disabled. See
(e.g. superheat control), the alarms, the status of the digital inputs and the paragraph 9.5.
relay outputs. Finally, it can save the configuration parameters for one (**) Only if EVD Evolution TWIN is operating as a single driver or programmable
controller and transfer them to a second controller (see the procedure for superheat control is enabled.
uploading and downloading the parameters).
For installation:
• remove the cover, pressing on the fastening points; Keypad
• fit the display board, as shown; Button Function
• the display will come on, and if the controller is being commissioned, the Prg • opens the screen for entering the password to access
guided configuration procedure will start. programming mode.
• if in alarm status, displays the alarm queue;
press • in the “Manufacturer” level, when scrolling the parameters,
shows the explanation screens (Help);
• pressed together with ENTER, switches the display from one
driver to the other
Esc • exits the Programming (Service/Manufacturer) and Display
modes;
• after setting a parameter, exits without saving the changes.
• navigates the screens on the display;
UP/DOWN • increases/decreases the value.
• switches from display to parameter programming mode;
• confirms the value and returns to the list of parameters;
ENTER • pressed together with HELP, switches the display from one
press
driver to the other.
Fig. 3.b Tab. 3.c
Important: the controller is not activated if the configuration Note: :the variables displayed as standard can be selected by
procedure has not been completed. configuring the parameters “Variable 1 on display” and “Variable 2 on display”
The front panel now holds the display and the keypad, made up of 6 buttons, for each driver. See the list of parameters.
that, pressed alone or in combination, are used to perform all the configuration
and programming operations on the controller.

ENG
3.3 Switching between drivers (display) the right-most figure and confirming each figure with ENTER;
4. if the value entered is correct, the first modifiable parameter is displayed,
Procedure: network address;
press the Help and Enter buttons together. Switching when programming 5. press UP/DOWN to select the parameter to be set;
the parameters displays the parameters for driver A and driver B on the same 6. press ENTER to move to the value of the parameter;
screen. 7. press UP/DOWN to modify the value;
8. press ENTER to save the new value of the parameter;
CONFIGURATION A 9. repeat steps 5, 6, 7, 8 to modify the other parameters;
PROBE S1 10. press Esc to exit the procedure for modifying the Service parameters.
Ratiom., -1/9.3 barg
MAIN CONTROL
display cabinet/
cold room
E6HHLDG9
%%%&
CONFIGURATION B Fig. 3.f

PROBE S1
RaTiom., -1/9.3 barg Note:
MAIN CONTROL • if when setting a parameter the value entered is out-of-range, this is not
BACK PRESSURE EPR accepted and the parameter soon after returns to the previous value;
• if no button is pressed, after 5 min the display automatically returns to the
standard mode.
• to set a negative value use ENTER to move to the left-most digit and press
UP/DOWN.
Fig. 3.d
Modifying the Manufacturer parameters
Important: the probe S1 parameter is common to both drivers, while the The Manufacturer level is used to configure all the controller parameters, and
main control parameter must be set for each driver. See the table of parameters. consequently, in addition to the Service parameters, the parameters relating
to alarm management, the probes and the configuration of the valve. See the
table of parameters.
Procedure:
3.4 Display mode (display) 1. press Esc one or more times to switch to the standard display;
Display mode is used to display the useful variables showing the operation 2. Select driver A or B to set the corresponding parameters (see paragraph 3.3);
of the system. 3. press Prg : the display shows a screen with the PASSWORD request;
The variables displayed depend on the type of control selected. 4. press ENTER and enter the password for the Manufacturer level: 66,
1. Press Esc one or more times to switch to the standard display; starting from the right-most figure and confirming each figure with
2. Select driver A or B to display the corresponding variables (see paragraph 3.3); ENTER;
3. press UP/DOWN: the display shows a graph of the superheat, the percentage 5. if the value entered is correct, the list of parameter categories is shown:
of valve opening, the evaporation pressure and temperature and the - Configuration
suction temperature variables; - Probes
4. press UP/DOWN: the variables are shown on the display followed by the - Control
screens with the probe and valve motor electrical connections; - Special
5. press Esc to exit display mode. - Alarm configuration
For the complete list of variables used according to the type of control see - Valve
paragraph “Variables used based on the type of control”. 6. press the UP/DOWN buttons to select the category and ENTER to access the
first parameter in the category;
SH=4.9K
7. press UP/DOWN to select the parameter to be set and ENTER to move to the
6.4°C A/B value of the parameter;
8. press UP/DOWN to modify the value;
211stp 3.8barg 9. press ENTER to save the new value of the parameter;
69% 1.5°C 10. repeat steps 7, 8, 9 to modify the other parameters;
11. press Esc to exit the procedure for modifying the Manufacturer parameters
CONFIGURAZIONE A/B
Fig. 3.e SONDE
REGOLAZIONE
SPECIALI
CONFIG.ALLARMI
VALVOLA
3.5 Programming mode (display)
The parameters can be modified using the front keypad. Access differs
according to the user level: Service (Installer) and Manufacturer parameters. Fig. 3.g
Note:
Modifying the Service parameters • all the controller parameters can be modified by entering the Manufacturer
The Service parameters, as well as the parameters for commissioning the level;
controller, also include those for the configuration of the inputs, the relay • if when setting a parameter the value entered is out-of-range, this is not
output, the superheat set point or the type of control in general, and the accepted and the parameter soon after returns to the previous value;
protection thresholds. See the table of parameters. • if no button is pressed, after 5 min the display automatically returns to the
Procedure: standard mode.
1. press Esc one or more times to switch to the standard display and select driver
A or B to set the corresponding parameters (see paragraph 3.3);
2. press Prg: the display shows a screen with the PASSWORD request;
3. press ENTER and enter the password for the Service level: 22, starting from
ENG
4. COMMISSIONING
Important: if the refrigerant is not available among the refrigerant 4.2 Setting the pLAN network address
parameter options, contact CAREL service to: The pLAN addresses of the devices in the network must be assigned according
1. confirm that the system: pCO controller + CAREL electronic expansion to the following rule:
valve is compatible with the desired refrigerant (custom); 1. the EVD Evolution driver addresses must be assigned in increasing order from
2. identify the values that define the custom refrigerant: “Dew a…f high/ left to right, starting with the controllers (A),
low” and “Bubble a…f high/low”. See the parameter table. 2. then the drivers (B) and finally
3. the terminals (C).
ADDR = 31
4.1 Commissioning ADDR = 32
Once the electrical connections have been completed (see the chapter pGD pGD C OK
on installation) and the power supply has been connected, the operations
required for commissioning the controller depend on the type of interface
used, however essentially involve setting just 4 parameters: refrigerant, valve, 3
type of pressure probe (S1 for driver A and S3 for driver B) and type of main
G0
VBAT
COM 1
NO 1
G
1 3 2 4
G0
G0
VBAT
COM 1
NO 1
VBAT
COM 1
NO 1
G
G
1 3 2 4 1 3 2 4
G0
VBAT
COM 1
NO 1
G
1 3 2 4
Power Supply E XV connection Relay Power Supply E XV connection Relay Power Supply E XV connection Relay Power Supply E XV connection Relay
control. The network address for EVD evolution twin is single.

ADDR = 9 ADDR=10 ADDR=11 ADDR=12
Types of interfaces: B
• DISPLAY: after having correctly configured the setup parameters, Analog – Digital Input Network Analog – Digital Input Network Analog – Digital Input Network Analog – Digital Input Network
V REF
GND
V REF
V REF
V REF
GND
GND
DI1
DI2
GND
S1
S2
S3
S4
DI1
DI2
DI1
DI2
S1
S2
S3
S4
S1
S2
S3
S4
DI1
DI2
GND Tx/Rx
S1
S2
S3
S4
GND Tx/Rx GND Tx/Rx
GND Tx/Rx
confirmation will be requested. Only after confirmation will the controller EVD EVD EVD EVD
be enabled for operation, the main screen will be shown on the display and
control will be able to commence when requested by the pCO controller
2
via LAN or when digital input DI1 closes for driver A and DI2 for driver B.
CANH
CANL
GND
CANH
CANL
GND
See paragraph 4.2;
• VPM: to enable control of the drivers via VPM, set “Enable EVD
control” to 1; this is included in the safety parameters, in the special pCO
parameters menu, under the corresponding access level. However,
the setup parameters should first be set in the related menu.
ADDR = 1 ADDR = 2 A
The drivers will then be enabled for operation and control will be able to
commence when requested by the pCO controller via LAN or when digital
input DI1/DI2 closes. If due to error or for any other reason “Enable EVD
+5 VREF
+Vterm
+5 VREF
+Vterm
GND
GND
G0
U1
U2
control” should be set to 0 (zero), the controller will immediately stop U3
G
G0
U1
U2
U3
G
control and will remain in standby until re-enabled, with the valve stopped pCO pCO
in the last position;

1
• SUPERVISOR: to simplify the commissioning of a considerable number of
controllers using the supervisor, the setup operation on the display can
be limited to simply setting the network address. The display will then Fig. 4.a
be able to be removed and the configuration procedure postponed to a Important: if the addresses are not assigned in this way, as for example
later stage using the supervisor or, if necessary, reconnecting the display. shown in the following figure, malfunctions will occur if one of the pCO
To enable control of the controller via supervisor, set “Enable EVD control”; controllers is offline.
this is included in the safety parameters, in the special parameters menu,
under the corresponding access level. However, the setup parameters ADDR = 31 ADDR = 32
should first be set in the related menu. The controller will then be enabled
for operation and control will be able to commence when requested by
pGD pGD C NO!
the pCO controller via pLAN or when digital input DI1 closes for driver A
and DI2 for driver B. As highlighted on the supervisor, inside of the yellow 3
information field relating to the “Enable EVD control” parameter, if due to
G0
VBAT
COM 1
NO 1
G
1 3 2 4
NO 1
G0
VBAT
COM 1
NO 1
G0
VBAT
COM 1
G
1 3 2 4 1 3 2 4
G0
VBAT
COM 1
NO 1
G
1 3 2 4
Power Supply E XV connection Relay Power Supply E XV connection Relay Power Supply E XV connection Relay Power Supply E XV connection Relay
error or for any other reason “Enable EVD control” should be set to 0 (zero),
ADDR = 9 ADDR=17 ADDR=10 ADDR=18
the controller will immediately stop control and will remain in standby until B
re-enabled, with the valve stopped in the last position; Analog – Digital Input Network Analog – Digital Input Network Analog – Digital Input Network Analog – Digital Input Network
V REF
V REF
GND
V REF
GND
V REF
GND
DI1
DI2
• pCO PROGRAMMABLE CONTROLLER: the first operation to be

GND
S1
S2
S3
S4
DI1
DI2
DI1
DI2
S1
S2
S3
S4
S1
S2
S3
S4
DI1
DI2
GND Tx/Rx
S1
S2
S3
S4
GND Tx/Rx GND Tx/Rx

GND Tx/Rx
EVD EVD EVD EVD

performed, if necessary, is to set the network address using the display.
2
Important: for the driver with pLAN serial port, see the
CANH
CANL
GND
CANH
CANL
GND
guidelines described in the following paragraph for setting the address.

pCO
If a pLAN, tLAN or RS485/Modbus® controller is used, connected to a
pCO family controller, the setup parameters will not need to be set and
ADDR = 1 ADDR = 2 A
confirmed. In fact, the application running on the pCO will manage the
correct values based on the unit controlled. Consequently, simply set the
pLAN, tLAN or RS485/Modbus® address for the controller as required by
+5 VREF
+Vterm
+5 VREF
+Vterm
GND
GND
G0
U1
U2
U3
the application on the pCO, and after a few seconds communication will
G
G0
U1
U2
U3
G
pCO pCO
commence between the two instruments and the controller automatically
be enabled for control. The main screen will shown on the display, which 1
can then be removed, and control will be commence when requested
by the pCO controller or digital input DI1 for driver A and DI2 for driver B. Fig. 4.b
(see paragraph 6.3). If there is no communication between the pCO and
the controller (see the paragraph “LAN error alarm”), this will be able to
continue control based on the status of the digital inputs.

ENG
4.3 Guidedcommissioningprocedure(display) Note:
After having fitted the display: • to exit the guided commissioning procedure press the DOWN button
repeatedly and finally confirm that configuration has been completed. The
guided procedure CANNOT be ended by pressing Esc;
Configuration 1/5 A Configuration 1/5 A
Network address Network address • if the configuration procedure ends with a configuration error, access
198 198 Service parameter programming mode and modify the value of the
parameter in question;
• if the valve and/or the pressure probe used are not available in the list, select
any model and end the procedure. Then the controller will be enabled for
control, and it will be possible to enter Manufacturer programming mode
1. the first parameter is displayed: 3. press UP/DOWN to modify the and set the corresponding parameters manually. Below are the parameters
network address; value for driver A and driver B to be set during the commissioning procedure.
2. press Enter to move to the value These parameters have the same description for both driver A and driver
of the parameter B, the user can recognise which parameter is being set by the letter A/B
shown at the top right of the display.
Configuration 1/5 A Configuration 2/5 A
Network address REFRIGERANT
1 R404A Important: for 24 Vdc power supply, at the end of the guided
Valve
Carel ExV
commissioning procedure, to start control set “Power supply mode”
parameter=1, otherwise the valves remain in the closed position. See
paragraph 6.1.
4. press Enter to confirm the value 5. press UP/DOWN to move to the

next parameter, refrigerant for driver Network address
A, indicated by the letter at the top The network address assigns to the controller an address for the serial
right; connection to a supervisory system via RS485, and to a pCO controller via
6. repeat steps 2, 3, 4, 5 to modify the values of the parameters for driver A: pLAN, tLAN, RS485/Modbus®. This parameter is common to both drivers A
refrigerant, valve, pressure probe S1, main control; and B.
Parameter/description Def. Min. Max. UOM

A A
CONFIGURATION
VREF
GND
GND
green
TxRx
DI1
DI2
S1
S4
S2
S3
brown
TEMP S2
yellow
white Network address 198 1 207 -
white Tab. 4.a
NOA
G0
COMA
VBAT
PRESS S1
G
4
2
1
black
3
green
For network connection of the RS485/Modbus® models the communication
speed also needs to be set, in bits per second, using the parameter “Network
settings”. See paragraph 6.2.
7. check that the probe electrical 8. check that the electrical
connections are correct for driver A; connections are correct for valve A;
then set the same parameters for Refrigerant
driver B (see step 6); The type of refrigerant is essential for calculating the superheat. In addition, it
9. set the values of the parameters for driver B: refrigerant, valve B, pressure is used to calculate the evaporation and condensing temperature based on
probe S3, main control; the reading of the pressure probe.
Parameter/description Def.
B B CONFIGURATION
VREF
GND
GND
green
TxRx
DI1
DI2
S1
S4
S2
S3
brown
TEMP S4
yellow
white
Refrigerant R404A
white 0 = user definer
PRESS S3
4
NOB
COMB
2
1
black
3
green 1= R22 2= R134a 3= R404A 4= R407C 5= R410A

6= R507A 7= R290 8= R600 9= R600a 10= R717
11= R744 12= R728 13= R1270 14= R417A 15= R422D
16= R413A 17= R422A 18= R423A 19= R407A 20= R427A
10. check that the probe electrical 11. check that the electrical 21= R245FA 22= R407F 23=R32 24=HTR01 25= HTR02
connections are correct for driver B; connections are correct for valve B; 26=R23 27 = R1234yf 28 = R1234ze 29 = R455A 30 = R170
31 = R442A 32 = R447A 33 = R448A 34 = R449A 35 = R450A
36 = R452A 37 = R508B 38 = R452B 39 = R513A 40 = R454B
12. if the configuration is correct exit 41 = R458A
Configuration
End configuration?
the procedure, otherwise choose Tab. 4.b
YES NO NO and return to step 2.
Note:
• for CO2 cascade systems, at the end of the commissioning procedure also
set the auxiliary refrigerant. See the following paragraph Appendix 2;
• if the refrigerant is not among those available for the “Refrigerant”
parameter:
1. set any refrigerant (e.g. leave the default, R404A);
At the end of the configuration procedure the controller activates the valve 2. select the model of valve, the pressure probe S1, the type of main control
motor error recognition procedure, displaying “INIT” on the display. See and end the commissioning procedure;
paragraph 9.5. To simplify commissioning and avoid possible malfunctions, 3. enter programming mode and set the type of refrigerant: custom, and
the controller will not start until the following have been configured for each the parameters “Dew a…f high” and “Bubble a…f low” that define the
driver: refrigerant;
4. network address (common parameter); 4. start control, for example by closing the digital input contact to enable
5. refrigerant; operation.
6. valve;
7. pressure probe;
8. type of main control, that is, the type of unit the superheat control is applied
to.

ENG
Valve
Setting the type of valve automatically defines all the control parameters based Important: if two pressure probes S1 and S3 are installed, these must
on the manufacturer’s data for each model. In Manufacturer programming be the same type. A ratiometric probe and an electronic probe cannot be
mode, the control parameters can then be fully customised if the valve used is used together.
not in the standard list. In this case, the controller will detect the modification
and indicate the type of valve as “Customised”. Note: in the case of multiplexed systems where the same pressure
Parameter/description Def. probe is shared between the twin1 and twin2 controllers, choose the normal
CONFIGURATION option for driver A and the “remote” option for the remaining drivers.
Valve: CAREL Example: to use the same pressure probe P1 for driver A and B: 4 to 20 mA,
0= user defined; 1= CAREL ExV; 2= Alco EX4; 3=Alco EX5; 4=Alco EXV -0.5 to 7 barg
EX6; 5=Alco EX7; 6=Alco EX8 330 Hz recommended CAREL; For driver A on the twin 1 controller select: 4 to 20 mA, -0.5 to 7 barg.
7=Alco EX8 500 Hz specific Alco; 8=Sporlan SEI 0.5-11; 9=Sporlan For driver B on the twin 1 controller and for driver A and B on the twin 2
SER 1.5-20; 10=Sporlan SEI 30; 11=Sporlan SEI 50; 12=Sporlan controller select: remote 4 to 20 mA, -0.5 to 7 barg.
SEH 100; 13=Sporlan SEH 175; 14=Danfoss ETS 12.5-25B; The connection diagram is shown in paragraph 2.6
15=Danfoss ETS 50B; 16=Danfoss ETS 100B; 17=Danfoss ETS 250;
18=Danfoss ETS 400; 19=Two EXV CAREL connected together; Note:
20=Sporlan SER(I)G,J,K; 21= Danfoss CCM 10-20-30; 22= Danfoss • the range of measurement by default is always in bar gauge (barg). In
CCM 40; 23=Danfoss CCMT 2-4-8; 24 = Disabled; 25 = CAREL the manufacturer menu, the parameters corresponding to the range of
ejector E2J17AS1N0; 26 = CAREL ejector E2J23AT1N0; 27 = measurement and the alarms can be customised if the probe used is not
CAREL ejector E3J26AT2N0; 28 = CAREL ejector E3J33AU2N0; 29 in the standard list. If modifying the range of measurement, the controller
= CAREL ejector E3J39AV3N0; 30 = CAREL ejector E6J50AV3N0; will detect the modification and indicate the type of probe S1 or S3 as
31 = Danfoss CCMT 16; 32 = Danfoss CCMT 24; 33 = Danfoss “Customised”;
CCMT 30; 34 = Danfoss CCMT 42; 35 = Danfoss Colibri • the software on the controller takes into consideration the unit of measure.
Tab. 4.c If a range of measurement is selected and then the unit of measure is
changed (from bars to psi), the controller automatically updates the limits
Note: select Valve = disabled if Main control = I/O expansion for pCO of the range of measurement and the alarm limits. By default, the main
to prevent the EEV motor error from being displayed. I/O expansion for pCO control probes S2 and S4 are set as “CAREL NTC”. Other types of probes can
control can be selected at the end of the commissioning procedure, by be selected in the service menu;
entering programming mode. • unlike the pressure probes, the temperature probes do not have any
modifiable parameters relating to the range of measurement, and
consequently only the models indicated in the list can be used (see
Important: the chapter on “Functions” and the list of parameters). In any case, in
• two CAREL EXV valves connected together must be selected if two manufacturer programming mode, the limits for the probe alarm signal
CAREL EXV valves are connected to the same terminal, to have parallel or can be customised.
complementary operation;
• as described, control is only possible with CAREL EXV valves;
Main control
• NOT all CAREL valves can be connected: see paragraph 2.5.
Setting the main control defines the operating mode for each driver.
Pressure/refrigerant level probe S1 & S3 CONFIGURATION
Main control
Setting the type of pressure probe S1 for driver A and S3 for driver B defines
Superheat control
the range of measurement and the alarm limits based on the manufacturer’s
1= multiplexed showcase/cold room multiplexed
data for each model, usually indicated on the rating plate on the probe.
2= showcase/cold room with compressor on board showcase/
Select “CAREL liquid level” and connect the CAREL float level sensor to manage
3= “perturbed” showcase/cold room cold room
the following functions:
4= showcase/cold room with sub-critical CO2
- evaporator liquid level control with CAREL sensor; 5= R404A condenser for sub-critical CO2
- condenser liquid level control with CAREL sensor. 6= air-conditioner/chiller with plate heat exchanger
For example, connecting two CAREL liquid level probes, one to S1 and one to 7= air-conditioner/chiller with tube bundle heat exchanger
S3, allows independent control of two refrigerant liquid levels. 8= air-conditioner/chiller with finned coil heat exchanger
9= air-conditioner/chiller with variable cooling capacity
See the chapter on “Control”. 10= “perturbed” air-conditioner/chiller
Special control
11= EPR back pressure
CONFIGURATION
12= hot gas bypass by pressure
Probe S1, S3 Ratiom.:
13= hot gas bypass by temperature
Ratiometric (OUT= 0 to 5 V) Electronic (OUT= 4 to 20 mA) -1 to 9.3
14= transcritical CO2 gas cooler
1= -1 to 4.2 barg 8= -0.5 to 7 barg barg
15= analogue positioner (4 to 20 mA)
2=-0.4…9.3 barg 9= 0 to 10 barg
16= analogue positioner (0 to 10 V)
3= -1 to 9.3 barg 10= 0 to 18.2 barg
17= air-conditioner/chiller or showcase/cold room with
4= 0 to 17.3 barg 11= 0 to 25 barg
adaptive control
5= 0.85 to 34.2 barg 12= 0 to 30 barg
18= air-conditioner/chiller with Digital Scroll compressor (*)
6= 0 to 34.5 barg 13= 0 to 44.8 barg
19=AC/chiller with BLDC scroll compressor
7= 0 to 45 barg 14= remote, -0.5 to 7 barg
15= remote, 0 to 10 barg (CANNOT BE SELECTED)
16= remote, 0 to 18.2 barg 20=superheat regulation with 2 temperature probes
17= remote, 0 to 25 barg (CANNOT BE SELECTED)
18= remote, 0 to 30 barg 21=I/O expander for pCO
19= remote, 0 to 44.8 barg 22= Programmable SH regulation
20= External signal (4 to 20 mA) 23= Programmable special regulation
21= -1 to 12.8 barg 24= Programmable positioner
22= 0 to 20.7 barg 25= Evaporator liquid level regulation with CAREL sensor
23= 1.86 to 43.0 barg 26= Condenser liquid level regulation with CAREL sensor
24 = CAREL liquid level (*) only for CAREL valves controls
25 = 0...60,0 barg Tab. 4.e
26 = 0...90,0 barg
27 = external signal (0 to 5 V)(*)
Tab. 4.d
(*) for programmable positioner. See chapter “Control”.

ENG
The superheat set point and all the parameters corresponding to PID control,
the operation of the protectors and the meaning and use of probes S1/S3
and/or S2/S4 will be automatically set to the values recommended by CAREL
based on the selected application.
During this initial configuration phase, only superheat control mode from 1
to 10 can be set, which differ based on the application (chiller, refrigerated
cabinet, etc.).
In the event of errors in the initial configuration, these parameters can later be
accessed and modified inside the service or manufacturer menu.
If the controller default parameters are restored (RESET procedure, see the
chapter on Installation), when next started the display will again show the
guided commissioning procedure.
4.4 Checks after commissioning

After commissioning:
• check that the valves complete a full closing cycle to perform alignment;
• set, if necessary, in Service or Manufacturer programming mode, the
superheat set point (otherwise keep the value recommended by CAREL
based on the application) and the protection thresholds (LOP, MOP, etc.).
See the chapter on Protectors.
4.5 Other functions

By entering Service programming mode, other types of main control can be
selected (transcritical CO2, hot gas bypass, etc.), as well as so-called special
control functions, and suitable values set for the control set point and the
LowSH, LOP and MOP protection thresholds (see the chapter on “Protectors”),
which depend on the specific characteristics of the unit controlled.
By entering Manufacturer programming mode, finally, the operation of
the controller can be completely customised, setting the function of each
parameter. If the parameters corresponding to PID control are modified,
the controller will detect the modification and indicate the main control as
“Customised.

ENG
5. CONTROL
5.1 Main control Superheat control
EVD evolution twin features two types of control, which can be set The parameter that the control of the electronic valve is based on is the
independently for driver A and B. Main control defines the operating mode superheat temperature, which effectively tells whether or not there is liquid
of the driver. The first 10 settings refer to superheat control, the others are so- at the end of the evaporator. EVD Evolution twin can independently manage
called “special” settings and are pressure or temperature settings or depend superheat control on two refrigerant circuits. The superheat temperature
on a control signal from an external controller. The last special functions (18, is calculated as the difference between: superheated gas temperature
19, 20) also relate to superheat control, but they can be selectable if EVD (measured by a temperature probe located at the end of the evaporator) and
Evolution TWIN is working as single driver (see Appendix 2). Programmable the saturated evaporation temperature (calculated based on the reading of a
control exploits CAREL’s technology and know-how in terms of control pressure transducer located at the end of the evaporator and using the Tsat(P)
logic. Finally, it is possible to control liquid level in applications with flooded conversion curve for each refrigerant).
evaporator/condenser. Superheat = Superheated gas temperature(*) – Satur. evaporation temperature
(*) suction
Parameter/Description Def.
CONFIGURATION If the superheat temperature is high it means that the evaporation process is
Main control multiplexed completed well before the end of the evaporator, and therefore flow-rate of
Superheat control showcase/ refrigerant through the valve is insufficient. This causes a reduction in cooling
1= multiplexed showcase/cold room cold room efficiency due to the failure to exploit part of the evaporator. The valve must
2= showcase/cold room with compressor on board therefore be opened further. Vice-versa, if the superheat temperature is low
3= “perturbed” showcase/cold room it means that the evaporation process has not concluded at the end of the
4= showcase/cold room with sub-critical CO2 evaporator and a certain quantity of liquid will still be present at the inlet to
5= R404A condenser for sub-critical CO2 the compressor. The valve must therefore be closed further. The operating
6= air-conditioner/chiller with plate heat exchanger range of the superheat temperature is limited at the lower end: if the flow-
7= air-conditioner/chiller with tube bundle heat exchanger rate through the valve is excessive the superheat measured will be near 0 K.
8= air-conditioner/chiller with finned coil heat exchanger This indicates the presence of liquid, even if the percentage of this relative to
9= air-conditioner/chiller with variable cooling capacity the gas cannot be quantified. There is therefore un undetermined risk to the
10= “perturbed” air-conditioner/chiller compressor that must be avoided. Moreover, a high superheat temperature
Special control as mentioned corresponds to an insufficient flow-rate of refrigerant. The
11= EPR back pressure superheat temperature must therefore always be greater than 0 K and have
12= hot gas bypass by pressure a minimum stable value allowed by the valve-unit system. A low superheat
13= hot gas bypass by temperature temperature in fact corresponds to a situation of probable instability due to
14= transcritical CO2 gas cooler the turbulent evaporation process approaching the measurement point of
15= analogue positioner (4 to 20 mA) the probes. The expansion valve must therefore be controlled with extreme
16= analogue positioner (0 to 10 V) precision and a reaction capacity around the superheat set point, which will
17= air-conditioner/chiller or showcase/cold room with almost always vary from 3 to 14 K. Set point values outside of this range are
adaptive control quite infrequent and relate to special applications.
18= air-conditioner/chiller with Digital Scroll compressor (*)
19=AC/chiller with BLDC scroll compressor (CANNOT BE Example of superheat control on two independent circuits A and B.
SELECTED)
20=superheat regulation with 2 temperature probes (CANNOT C1
BE SELECTED)
21=I/O expander for pCO (**)
22= Programmable SH regulation L1
23= Programmable special regulation
24= Programmable positioner
25= Evaporator liquid level regulation with CAREL sensor F1
A
26= Condenser liquid level regulation with CAREL sensor CP1
(*) only for CAREL valve drivers; (**) control only settable on driver A, howe- S1
ver corresponds to the entire controller.
Tab. 5.a
M
Note:
E1
• R404A condensers with subcritical CO2 refer to superheat control for valves V1 EEVA
installed in cascading systems where the flow of R404A (or other refrigerant) PA TA
in an exchanger acting as the CO2 condenser needs to be controlled;
• “perturbed” cabinet/cold room or air-conditioner/chiller refer to units
that momentarily or permanently operate with swinging condensing or C2
evaporation pressure;
• for the Auxiliary control setting see Appendix 2 EVD evolution
The following paragraphs explain all the types of control that can be set on twin
L2
EVD evolution twin.
S1
S2
S3
S4
5.2 Superheat control F2 B

CP2
The primary purpose of the electronic valve is ensure that the flow-rate of S2
refrigerant that flows through the nozzle corresponds to the flow-rate required
by the compressor. In this way, the evaporation process will take place along
the entire length of the evaporator and there will be no liquid at the outlet and M
consequently in the branch that runs to the compressor. E2

As liquid is not compressible, it may cause damage to the compressor and even V2 EEVB
PB TB
breakage if the quantity is considerable and the situation lasts some time.
Fig. 5.a

ENG
Key: Another possibility involves connecting two equal valves (operation in
CP1, CP2 compressor 1.2 parallel mode, see paragraph 2.5) to the same evaporator. This is useful in
C1, C2 condenser 1, 2 reverse-cycle chiller/heat pump applications, to improve distribution of the
L1, L2 liquid receiver 1, 2 refrigerant in the outdoor coil.
F1, F2 dewatering filter 1, 2
S1, S2 liquid indicator 1, 2 C1
EEVA, EEVB electronic expansion valve A,B
V1, V2 solenoid valve 1, 2
E1, E2 evaporator 1, 2 L1
A
PA, PB pressure probe
TA,TB temperature probe
F1
CP1
For the wiring, see paragraph “General connection diagram”. S1
Another application involves superheat control of two evaporators in the M E1

V1
same circuit. EEVA_1
C
PA TA
E2 EVD evolution
EEVA_2 twin
L
S1
S2
S3
S4
C2
F
EVD evolution CP
twin
L2
S
B
S1
S2
S3
S4
F2
CP2
M V S2
E1 E3
M V2
EEVA EEVB_1
PA TA
PB TB
E4
EEVB_2
E2
EEVB PB TB
Fig. 5.c
Key:
CP1,2 compressor 1, 2
Fig. 5.b
C1,C2 condenser 1, 2
Key:
E1, E2, E3, E4 evaporator 1, 2, 3, 4
CP compressor F1, F2 dewatering filter 1, 2
C condenser S1, S2 liquid indicator 1, 2
L liquid receiver EEVA_1, electronic expansion valves driver A
F dewatering filter EEVA_2
S liquid indicator EEVB_1, electronic expansion valves driver B
EEVA, electronic expansion valve A EEVB_2
EEVB electronic expansion valve B TA, TB temperature probe
E1, E2 evaporator 1, 2 L1, L2 liquid receiver 1, 2
PA, PB pressure probe driver A, B V1, V2 solenoid valve 1, 2
TA,TB temperature probe driver A, B
V solenoid valve For the wiring, see paragraph “General connection diagram”.
For the wiring, see paragraph “General connection diagram”.
PID parameters
Superheat control, as for any other mode that can be selected with the “main
Nota: in this example only one electronic pressure transducer control” parameter, is performed using PID control, which in its simplest form
with 4 to 20 mA output (SPK**0000) can be used, shared between is defined by the law:
driver A and B.
Ratiometric transducers cannot be shared. 1 de(t)
u(t)= K e(t) +T ∫e(t)dt + Td dt
i
Key:
u(t) Valve position Ti Integral time
e(t) Error Td Derivative time
K Proportional gain

ENG
Note that control is calculated as the sum of three separate contributions: C
proportional, integral and derivative.
• the proportional action opens or closes the valve proportionally to the
variation in the superheat temperature. Thus the greater the K (proportional
gain) the higher the response speed of the valve. The proportional action L
does not consider the superheat set point, but rather only reacts to
variations. Therefore if the superheat value does not vary significantly, the
valve will essentially remain stationary and the set point cannot be reached; EVD evolution
• the integral action is linked to time and moves the valve in proportion to twin
F
the deviation of the superheat value from the set point. The greater the CP
deviations, the more intense the integral action; in addition, the lower
S1
S2
S3
S4
the value of T (integral time), the more intense the action will be. The S GND Tx/Rx
integration time, in summary, represents the intensity of the reaction of the EEVA
M V
valve, especially when the superheat value is not near the set point;
PA TA
• the derivative action is linked to the speed of variation of the superheat value,
that is, the gradient at which the superheat changes from instant to instant.
It tends to react to any sudden variations, bringing forward the corrective E1
action, and its intensity depends on the value of the time T (derivative time).
EEVB E2
Parameter/Description Def. Min. Max. UOM PB TB
CONTROL
Superheat set point 11 LowSH: 180 (324) K(°F)
GND
threshold pCO
PID: proportional gain 15 0 800 -
shield
PID: integral time 150 0 1000 s
PID: derivative time 5 0 800 s Fig. 5.d
Tab. 5.b Key:
See the “EEV system guide” +030220810 for further information on calibrating CP Compressor V Solenoid valve
PID control. C Condenser S Liquid gauge
L Liquid receiver EEV Electronic expansion valve
Note: when selecting the type of main control (both superheat control F Dewatering filter E1, E2 Evaporator
and special modes), the PID control values suggested by CAREL will be TA, TB Temperature probes PA, PB Pressure probes
automatically set for each application.
For information on the wiring see paragraph “General connection diagram”.
Protection function control parameters
See the chapter on “Protectors”. Note that the protection thresholds are set by
the installer/manufacturer, while the times are automatically set based on the
PID control values suggested by CAREL for each application.
Parameter/Description Def. Min. Max. UOM

5.4 Special control
CONTROL EPR back pressure
LowSH protection: threshold 5 -40 (-72) SH set point K (°F) This type of control can be used in applications in which a constant pressure
LowSH protection: integral time 15 0 800 s is required in the refrigerant circuit. For example, a refrigeration system may
LOP protection: threshold -50 -60 (-76) MOP: th- °C (°F) include different showcases that operate at different temperatures (showcases
reshold for frozen foods, meat or dairy). The different temperatures of the circuits are
LOP protection: integral time 0 0 800 s achieved using pressure regulators installed in series with each circuit. The
MOP protection: threshold 50 LOP: 200 (392) °C (°F) special EPR function (Evaporator Pressure Regulator) is used to set a pressure
threshold set point and the PID control parameters required to achieve this.
MOP protection: integral time 20 0 800 s
Tab. 5.c
5.3 Control with Emerson Climate Digital

Scroll ™ compressor M T
E1
PA
Important: this type of control is incompatible with adaptive control
and autotuning. V1 V2 EVA
EVD evolution
twin
Digital Scroll compressors allow wide modulation of cooling capacity by
S1
S3
using a solenoid valve to active a patented refrigerant bypass mechanism.

This operation nonetheless causes swings in the pressure of the unit, which
may be amplified by normal control of the expansion valve, leading to
malfunctions. Dedicated control ensures greater stability and efficiency of the E2
entire unit by controlling the valve and limiting swings based on the instant M T
PB
compressor modulation status. To be able to use this mode, the LAN version
driver must be connected to a Carel pCO series controller running a special V1 V2 EVB
application to manage units with Digital scroll compressors.
Parameter/Description Def. Fig. 5.e

CONFIGURATION Key:
Main control multiplexed showcase/cold V1 Solenoid valve E1, E2 Evaporator 1, 2
room V2 Thermostatic expansion valve EVA, Electronic valve A, B
... EVB
air-conditioner/chiller with Digital Scroll PA, Pressure probe driver A, B
compressor PB
Tab. 5.d

ENG
This involves PID control without any protectors (LowSH, LOP, MOP, see the Hot gas bypass by temperature
chapter on Protectors), without any valve unblock procedure. Control is This control function can be used to control cooling capacity, which in the
performed on the pressure probe value read by input S1 for driver A and S3 for following example is performed by driver B. On a refrigerated cabinet, if the
driver B, compared to the set point: “EPR pressure set point”. Control is direct, ambient temperature probe S4 measures an increase in the temperature, the
as the pressure increases, the valve opens and vice-versa. cooling capacity must also increase, and so the EVB valve must close. In the
Parameter/Description Def. Min. Max. UOM example driver A is used for superheat control.
CONTROL
EPR pressure set point 3.5 -20 (-290) 200 (2900) barg (psig)
C
PID: derivative time 5 0 800 s
Tab. 5.e
L
EVB
Hot gas bypass by pressure
This control function can be used to control cooling capacity, which in the F CP
following example is performed by driver B. If there is no request from circuit Y, EVD evolution
twin
the compressor suction pressure decreases and the bypass valve opens to let
a greater quantity of hot gas flow and decrease the capacity of circuit X. Driver S
S4
S1
S2
A is used for superheat control on circuit Y.
EEVA
M
C
E TB
V
PA TA
L
EVB
Fig. 5.g
Key:
F CP
EVD evolution CP Compressor V Solenoid valve
twin C Condenser EEVA Electronic expansion valve A
S L Liquid receiver EVB Electronic valve B
S1
S2
S3
F Dewatering filter E Evaporator

PB S Liquid indicator PA Pressure probe driver A
TA, TB Temperature probe

E
M T
This involves PID control without any protectors (LowSH, LOP, MOP, see the
X
chapter on Protectors), without any valve unblock procedure. Control is
V1 V2 performed on the hot gas bypass temperature probe value read by input S4,
compared to the set point: “Hot gas bypass temperature set point”. Control is
EEVA reverse, as the temperature increases, the valve closes.
M
Y Parameter/Description Def. Min. Max. UOM
E CONTROL
V1
PA TA Hot gas bypass temperature set point 10 -60 200 °C (°F)
(-76) (392)
Fig. 5.f
Key:
Tab. 5.g
CP Compressor V1 Solenoid valve
C Condenser V2 Thermostatic expansion valve Another application that exploits this control function uses the connection
L Liquid receiver EEVA Electronic expansion valve A of two EXV valves together to simulate the effect of a three-way valve, called
F Dewatering filter EVB Electronic valve B “reheating”. To control humidity, valve EVB_2 is opened to let the refrigerant
S Liquid indicator E Evaporator flow into exchanger S. At the same time, the air that flows through evaporator
E is cooled and the excess humidity removed, yet the temperature is below
For the wiring, see paragraph “General connection diagram”. the set room temperature. It then flows through exchanger S, which heats it
This involves PID control without any protectors (LowSH, LOP, MOP, see the back to the set point (reheating). In addition, if dehumidification needs to be
chapter on Protectors), without any valve unblock procedure. Control is increased, with less cooling, valve EVA_2 must open to bypass at least some
performed on the hot gas bypass pressure probe value read by input S3, of the refrigerant to condenser C. The refrigerant that reaches the evaporator
compared to the set point: “Hot gas bypass pressure set point”. Control is thus has less cooling capacity. Valves EVA_1 and EVA_2 are also connected
reverse, as the pressure increases, the valve closes and vice-versa. together in complementary mode, controlled by the 4 to 20 mA signal on
input S1, from an external regulator.
CONTROL
Hot gas bypass pressure set point 3 -20 200 barg
(290) (2900) (psig)
Tab. 5.f

ENG
Key:
EVA_2
CP Compressor EVA Electronic valve A
GC Gas cooler EEVB Electronic expansion valve B
EVA_1 E Evaporator IHE Inside heat exchanger
EVB_1 V1 Solenoid valve
C For the wiring, see paragraph “General connection diagram”.
This involves PID control without any protectors (LowSH, LOP, MOP, see the
EVB_2 EVD evolution
twin
chapter on Protectors), without any valve unblock procedure. Control is
performed on the gas cooler pressure probe value read by input S1, with
S1
S2
S3
S4
S a set point depending on the gas cooler temperature read by input S2;
CP consequently there is not a set point parameter, but rather a formula: “CO2 gas
cooler pressure set point” = Coefficient A * Tgas cooler (S2) + Coefficient B. The
V3 set point calculated will be a variable that is visible in display mode. Control is
TB direct, as the pressure increases, the valve opens.
4...20 mA Parameter/Description Def. Min. Max. UOM

regulator SPECIAL
E
M T Transcritical CO2: coefficient A 3.3 -100 800 -
H% Transcritical CO2 : coefficient B -22.7 -100 800 -
CONTROL
V1 V2 PID : proportional gain 15 0 800
PID : integral time 150 0 1000 s
PID : derivative time 5 0 800 s
Fig. 5.h Tab. 5.h
Key:
CP Compressor EVA_1, 2 Electronic valves connected in
EVB_1, 2 complementary mode Analogue positioner (4 to 20 mA)
C Condenser H% Relative humidity probe This control function is available for driver A and driver B. Valve A will be
V1 Solenoid valve TB Temperature probe positioned linearly depending on the value of the “4 to 20 mA input for
V3 Non-return valve E Evaporator analogue valve positioning” read by input S1.
S Heat exchanger V2 Thermostatic expansion valve
Valve B will be positioned linearly depending on the value of the “4 to 20 mA
(reheating)
input for analogue valve positioning” read by input S3.
For the wiring, see paragraph “General connection diagram”. There is no PID control nor any protection (LowSH, LOP, MOP, see the chapter
on Protectors), and no valve unblock procedure.
Transcritical CO2 gas cooler Forced closing will only occur when digital input DI1 opens for driver A or
DI2 for driver B, thus switching between control status and standby. The
This solution for the use of CO2 in refrigerating systems with a transcritical
pre-positioning and repositioning procedures are not performed. Manual
cycle involves using a gas cooler, that is a refrigerant/air heat exchanger
positioning can be enabled when control is active or in standby.
resistant to high pressures, in place of the condenser.
In transcritical operating conditions, for a certain gas cooler outlet temperature,
there is pressure that optimises the efficiency of the system: EVA
EVD evolution T
twin regulator
Set= pressure set point in a gas cooler with transcritical CO2
T= gas cooler outlet temperature P
S1
Default value: A=3.3, B= -22.7.

In the simplified diagram shown below control is performed by driver A and
the simplest solution in conceptual terms is shown. The complications in the 4...20 mA
systems arise due to the high pressure and the need to optimise efficiency.
Driver B is used for superheat control.
EVB
EVD evolution
EVD evolution T
twin regulator
twin
P
S1
S2
S3
S4
S3
EVA GC
PA TA 4...20 mA
A1, A2
CP
100%
IHE
0%
4 20 mA
Fig. 5.j
Key:
M EEVB
EVA Electronic valve A A1 Valve opening A
E EVB Electronic valve B A2 Valve opening B
V1 PB TB
Fig. 5.i
ENG
Analogue positioner (0 to 10 Vdc) 5.5 Programmable control
This control function is only available for driver A. The valve will be positioned With programmable control, the unused probe can be exploited to activate
linearly depending on the value of the “0 to 10 V input for analogue valve an auxiliary control function and maximise the controller’s potential. The
positioning” read by input S2. following types of programmable control are available:
There is no PID control nor any protection (LowSH, LOP, MOP), and no valve • Programmable superheat control (SH);
unblock procedure. The opening of digital input DI1 stops control on driver • Programmable special control;
A, with corresponding forced closing of the valve and changeover to standby • Programmable positioner.
status.
Parameter/description Def Min Max U.M.
EVA CONFIGURATION
Main control Multi- - - -
… plexed
EVD evolution T 22= Programmable SH control ¦ cabinet
twin regulator / cold
23 = Programmable special control¦
P 24 = Programmable positioner room
S2
…
SPECIAL
0...10 Vdc Programmable control configuration 0 0
32767 -
Programmable control input 0 0
32767 -
A1
Programmable SH control options 0 0
32767 -
100% Programmable control set point 0 800 -800
(-11603)
(11603)
Tab. 5.j
The table shows the programmable control functions and the related
0% parameter settings.
0 10 Vdc Function Parameter to be set
Direct/reverse setting Programmable control config.
Fig. 5.k Type of physical value controlled Programmable control config.
Key: Input processing to determine measur. Programmable control config.
Correction to each individual input for inte- Programmable control input
EVA Electronic valve A A1 Valve opening A
gration in measurement calculation
For the wiring, see paragraph “General connection diagram”. Association between physical inputs and Programmable control input
logical outputs
Important: the pre-positioning and repositioning procedures are not

performed. Manual positioning can be enabled when control is active or in Note: the control error is the result of the difference between the set
standby. point and the measurement:
setpoint error
I/O expander for pCO PID
The EVD Evolution driver is connected to the pCO programmable controller
via LAN, transferring the probe readings quickly and without filtering. The
measure
driver operates as a simple actuator, and receives the information needed to
manage the valves from the pCO.
CONFIGURATION Direct operation: error = measurement - set point
Main control multiplexed showcase/cold Reverse operation: error = set point - measurement
… room
I/O expander for pCO Programmable control configuration
Tab. 5.i
Important: for the explanation of the HiTcond (high condensing
temperature), reverse HiTcond protectors and the “Modulating thermostat”
auxiliary control function, see Appendix 2.
Each digit in the “Programmable control configuration” parameter has a

special meaning, depending on its position:
EEVB
POSITION DESCRIPTION NOTE
Tens of thousands (DM) Control: direct/reverse Select type of control
EVD
EEVA action: direct/reverse
evolution Thousands (M) Auxiliary control Selection any auxiliary
control or protector
used for superheat
control
S1
S2
S3
S4
GND Tx/Rx
Hundreds Do not select -
Tens Controlled value Select the type of
TB controlled physical
value (temperature,
PB pressure…)
Units Measurement function Select the function for
TA calculating the value
GND
pCO
controlled by the PID
PA (measurement)
shield Tab. 5.a
Fig. 5.l
Key:
T Temperature probe P Pressure probe
EV Electronic valve

ENG
Direct/reverse control – Tens of thousands Options/ programmable control set point
Value Description
0 PID in direct control Note:
1 PID in reverse control - if Control = Programmable special control, the setting of the
2,….9 - “Programmable control options” parameter has no affect;
- if Control = “Programmable positioner”, the settings of the “Programmable
AUX control - Thousands control options” and “Programmable control set point” parameters have
Value Description no affect.
0 None The physical value measured is assigned to the individual probes S1 to S4 by
1 HITCond protection the “Programmable control options” parameter. The parameter has 16 bits and
2 Modulating thermostat is divided into 4 digits, as described in “Programmable control configuration”,
3 HiTcond protection in reverse corresponding to the 4 probes, S1, S2, S3, S4. The control set point si sets to
4,….9 - the “Programmable control set point” parameter.
Hundreds – DO NOT SELECT
POSITION DESCRIPTION
Controlled value - Tens Thousands Function of probe S1
Value Description Hundreds Function of probe S2
0 Temperature (°C/°F), absolute Tens Function of probe S3
1 Temperature (K/°F), relative Units Function of probe S4
2 Pressure (bar/psi), absolute
3 Pressure (barg/psig), relative Value Input function
4 Current (mA) for control 0 None
5 Voltage (V) for control 1 Suction temperature
6 Voltage (V) for positioner 2 Evaporation pressure
7 Current (mA) for positioner 3 Evaporation temperature
8.9 - 4 Condensing pressure
5 Condensing temperature
Measurement function - Units 6 Temperature (modulating thermostat)
Value Description 7,8,9 -
0 f1(S1)+ f2(S2)+ f3(S3)+ f4(S4)
1,….9 - Note: if several inputs are associated with the same logical meaning,
EVD Evolution considers the one associated with the input that has the
highest index.
Programmable control input
The function assigned to each input is defined by parameter - “Programmable
control input”. The parameter has 16 bits and is divided into 4 digits, as Examples
described in “Programmable control configuration”, corresponding to the 4
probes, S1, S2, S3, S4. EXAMPLE 1
Sharing of the 0 to 10 V input to control two valves in parallel with the same input.
POSITION DESCRIPTION
Thousands Function of probe S1 • Main control_1 = 0 to 10 V programmable positioner;
Hundreds Function of probe S2 Main control_2 = 0 to 10 V programmable positioner.
Tens Function of probe S3
Units Function of probe S4
• Programmable control configuration_1 = 00060; PID control function =
f(S1)+f(S2)+f(S3)+f(S4). The other settings not affect.
Value Input function Programmable control configuration_2 = 00060; PID control function =
0 0 f(S1)+f(S2)+f(S3)+f(S4);
1 + Sn
2 - Sn • Programmable control input_1 = 0100 ->Measurement =S2
3 + Tdew (Sn)(*) Programmable control input_2 = 0100 ->Measurement =S2
4 - Tdew (Sn) • Programmable control options_1 = XXXX, no affect
5 + Tbub (Sn)(**) Programmable control options_2 = XXXX, no affect
6 - Tbub (Sn)
7,8,9 - • Programmable control set point_1 = X.X, no affect
(*): Tdew() = function for calculating the saturated evaporation temperature Programmable control set point_2 = X.X, no affect
according to the type of gas.
(**): Tbubble = function for calculating the condensing temperature. EVD Evolution twin shares the input associated with probe 2 and moves the
two valves in parallel.
E D C EXAMPLE 2
Superheat control with hot gas bypass by temperature. Programmable control
Pressure [MPa]
is used to add the high condensing temperature protection (HiTCond).

• Main control_1 = 22 -> Programmable SH control;
• Main control_2 = 13 -> Hot gas bypass by temperature.
•
A B
Programmable control configuration_1=01010,
F 1) Direct PID temperature control;
2) HiTcond control enabled;
3) Temperature (°F/psig), absolute;
4) Measurement function: f1(S1)+f2(S2)+f3(S3)+f4(S4);
Enthalpy [kJ/kg] • Programmable control input_1 = 4100-> Measurement =-Tdew(S1)+S2
Fig. 5.m • Programmable control options_1 = 2140
Key: 1) S1 = Evaporation pressure
TA Saturated evaporation temperature = Tdew 2) S2 = Suction temperature
TB Superheated gas temperature = suction temperature 3) S3 = Condensing pressure
TB – TA Superheat 4) S4 = Not used
TD Condensing temperature (Tbubble)
TE Subcooled gas temperature
• Programmable control set point_1 = 10 K
TD – TE Subcooling
ENG
C
PB
L
EVB
F CP
EVD evolution
twin
S
S4
S1
S2
EEVA S3
M
E TB
V
PA TA
Fig. 5.n
5.6 Control with refrigerant level sensor

In the flooded shell and tube evaporator and in the flooded condenser, the
refrigerant vaporises outside of the tubes, which are immersed in the liquid
refrigerant. The hot fluid flowing through the tubes is cooled, transferring heat
to the refrigerant surrounding the tubes, so that this boils, with gas exiting
from the top, which is taken in by the compressor.
Parameter/description Def Min Max UOM

CONFIGURATION
Probe S1 Ratiometric:-1…9.3 - - -
… barg
24 = CAREL liquid level
…
Main control Multiplexed cabinet/ - - -
… cold room
26 = Evaporator liquid level
control with CAREL sensor
27 = Condenser liquid level
control with CAREL sensor
CONTROL
Liquid level set point 50 0 100 %
The action is reverse: if the liquid level measured by the float level sensor is
higher (lower) than the set point, the EEV valve closes (opens).
TO
COMPRESSOR
EVD
evolution
S2
S1
E
MAX = 100 %
Setpoint = 50 %
MIN = 0 %
EEV
FLOODED FROM
SHELL AND CONDENSER
TUBE EVAPORATOR
Fig. 5.o
Key:
S Float level sensor
EEV Electronic valve
E Flooded evaporator
With the condenser, the action is direct: if the liquid level measured by the
float level sensor is lower (higher) than the set point, the EEV valve closes
(opens).

ENG
6. FUNCTIONS
6.1 Power supply mode Inputs S2, S4
The options are standard NTC probes, high temperature NTC, combined
EVD evolution twin can be powered at 24 Vac or 24 Vdc. In the event of direct
temperature and pressure probes and 0 to 10 Vdc input. For S4 the 0 to 10
current power supply, after completing the commissioning procedure, to
Vdc input is not available. When choosing the type of probe, the minimum
start control set “Power supply mode” parameter=1.
and maximum alarm values are automatically set. See the chapter on “Alarms”.
Type CAREL code Range
SPECIAL
CAREL NTC (10KΩ at 25°C) NTC0**HP00 -50T105°C
Power supply mode 0 0 1 -
NTC0**WF00
0=24 Vac
NTC0**HF00
1= 24 Vdc CAREL NTC-HT HT (50KΩ at 25°C) NTC0**HT00 -30T150°C
Tab. 6.a Combined NTC SPKP**T0 -40T120°C
NTC low temperature NTC*LT* -80T60°C
Important: with direct current power supply, in the event of power
failures emergency closing of the valve is not performed, even if the
EVD0000UC0 module is connected. Important: for combined NTC probes, also select the parameter
relating to the corresponding ratiometric pressure probe.
6.2 Battery charge delay Parameter/description Def.

Battery charge delay to allow battery charging. In the presence of a battery to CONFIGURATION
close the valve, to avoid missing emergency closing in case of repeated and Probe S2: CAREL NTC
close blackouts, a regulation start delay has been introduced, configurable by 1= CAREL NTC; 2= CAREL NTC-HT high T.; 3= Combined NTC
the user depending on the backup system used (ultracap or lead battery). This SPKP**T0; 4= 0 to 10 V external signal; 5=NTC – LT CAREL low
delay, if set to a value> 0, occurs every time the driver is turned on to allow temperature
the battery to recharge. Probe S4: CAREL NTC
1= CAREL NTC; 2= CAREL NTC-HT high T.; 3= Combined NTC
Parameter/description Def. SPKP**T0; 4 = ---; 5=NTC – LT CAREL low temperature
ADVANCED Tab. 6.c
Battery charge delay 0 min
Calibrating pressure probes S1, S3 and temperature

probes S2 and S4 (offset and gain parameters)
6.3 Network connection If needing to be calibrate:
• the pressure probe, S1 and/or S3, the offset parameter can be used, which
represents a constant that is added to the signal across the entire range of
Important: to set the pLAN address, follow the guidelines in chap.4.
measurement, and can be expressed in barg/psig. If the 4 to 20 mA signal
To connect an RS485/Modbus® controller to the network, as well as the coming from an external controller on input S1 and/or S3needs to be
network address parameter (see paragraph 4.2), using the “Network settings” calibrated, both the offset and the gain parameters can be used, the latter
parameter. which modifies the gradient of the line in the field from 4 to 20 mA.
• the temperature probe, S2 and/or S4, the offset parameter can be used,
Parameter Description Def. which represents a constant that is added to the signal across the entire
SPECIAL
range of measurement, and can be expressed in °C/°F. If the 0 to 10
Set configuration parity Bit stop Baud rate
0 none parity 2 bit stop 4800 bps Vdc signal coming from an external controller on input S2 needs to be
1 none parity 2 bit stop 9600 bps calibrated, both the offset and the gain parameters can be used, the latter
2 none parity 2 bit stop 19200 bps x which modifies the gradient of the line in the field from 0 to 10 Vdc.
4 none parity 1 bit stop 4800 bps
16 even parity 2 bit stop 4800 bps
20 even parity 1 bit stop 4800 bps B B
24 odd parity 2 bit stop 4800 bps A A
25 odd parity 2 bit stop 9600 bps
26 odd parity 2 bit stop 19200 bps mA Vdc
28 odd parity 1 bit stop 4800 bps 4 20 0 10
29 odd parity 1 bit stop 9600 bps
30 odd parity 1 bit stop 19200 bps Fig. 6.a
Tab. 6.b Key:
A= offset, B= gain
Note: To use the Carel protocol you must use the default settings:
• byte size: 8 bits; Parameter/description Def. Min. Max. UOM
• stop bits: 2; Probes
• parity: none. S1: calibration offset 0 -60 (-870), 60 (870), barg (psig),
-60 60 mA
S1: calibration gain, 4 to 20 mA 1 -20 20 -
6.4 Inputs and outputs S2: calibration offset 0 -20 (-36) 20 (36) °C (°F), volt
S2: calibration gain, 0 to 10 V 1 -20 20 -
Analogue inputs S3: calibration offset 0 -60 (-870) 60 (870) barg (psig)
The parameters in question concern the choice of the type of pressure/liquid S3: calibration gain, 4 to 20 mA 1 -20 20 -
probe S1 and S3 and the choice of the temperature probe S2 and S4, as S4: calibration offset 0 -20 (-36) 20 (36) °C (°F)
well as the possibility to calibrate the pressure and temperature signals. As Tab. 6.d
regards the choice of pressure/liquid probe S1 and S3, see the chapter on
“Commissioning”.

ENG
Digital inputs Driver A Driver B
The functions of digital inputs 1 and 2 can be set by parameter, as shown in Case Function set Function performed by Function performed by
the table below: digital input digital input
Parameter/description Def. Min. Max. UOM DI1 DI2 PRIM SEC PRIM SEC
CONFIGURATION 1 PRIM PRIM DI1 - DI2 -
DI1 configuration 5/6 1 7 - 2 PRIM SEC DI1 DI2 DI1 -
1= Disabled 3 SEC PRIM DI2 - DI2 DI1
4 SEC SEC Regulation DI1 Regulation DI2
2= Valve regulation optimization after
backup driver backup driver
defrost
A (supervisor B) (supervisor
3= Discharged battery alarm mana-
variable) variable)
gement
4= Valve forced open (at 100%)
5= Regulation start/stop Note that:
6= Regulation backup • if digital inputs 1 and 2 are set to perform a PRIM function, driver A performs
7= Regulation security the function set by digital input 1 and driver B the function set by digital
CONTROL input 2;
Start delay after defrost 10 0 60 min • if digital inputs 1 and 2 are set to perform a PRIM and SEC function
respectively, driver A and driver B perform the PRIM function set on digital
Tab. 6.e
input DI1. Driver A will also perform the SEC function set on digital input
DI2;
Valve regulation optimization after defrost: the selected digital input tells
• if digital inputs 1 and 2 are set to perform a SEC and PRIM function
the driver the current defrost status.
respectively, driver A and driver B perform the PRIM function set on digital
Defrost active = contact closed.
input DI2. Driver B will also perform the SEC function set on digital input
Access Manufacturer programming mode to set the start delay after defrost;
DI1;
this parameter is common to both drivers.
• if digital inputs 1 and 2 are set to perform a SEC function, driver A will
perform the SEC function set on input DI1 and driver B will perform
Discharged battery alarm management: this setting can only be selected if the SEC function set on input DI2. Each driver will be set to “Regulation
the controller power supply is 24 Vac. If the selected digital input is connected backup”, with the value of the digital input determined respectively by the
to the battery charge module for EVD evolution, EVBAT00400, the controller supervisor variables:
signals discharged or faulty batteries, so as to generate an alarm message and - Regulation backup from supervisor (driver A);
warn the service technicians that maintenance is required. - Regulation backup from supervisor (driver B).
Valve forced open: when the digital input closes, the valve opens completely
(100%), unconditionally. When the contact opens again the valve closes and
Examples
moves to the position defined by the parameter “valve opening at start-up” for Example 1: assuming an EVD Evolution twin controller connected to the LAN.
the pre-position time. Control can then start. In this case, the start/stop control will come from the network.
The two digital inputs can be configured for:
Regulation start/stop: 1. valve regulation optimization after defrost (SEC function);
digital input closed: control active; 2. regulation backup (PRIM function).
digital input open: driver in standby (see the paragraph “Control status”); With reference to the previous table:
• in case 2, when there is no communication both driver A and driver B will
be enabled for control by digital input 1, and digital input 2 will determine
Important: this setting excludes activation/deactivation of control via when control stops to run the defrost for driver A only;
the network. See the following functions. • in case 3 when there is no communication digital input 2 will activate
control for both driver A and driver B. Digital input 1 will determine when
Regulation backup: if there is a network connection and communication control stops to run the defrost for driver B only.
fails, the driver checks the status of the digital input to determine whether
control is active or in standby; Example 2: assuming an EVD Evolution twin controller in stand-alone
operation. In this case, the start/stop control will come from the digital input.
Regulation security: if there is a network connection, before control The following cases are possible:
is activated the driver must receive the control activation signal and the 1. start / stop driver A/B from inputs DI1/DI2 (case 1);
selected digital input must be closed. If the digital input is open, the driver 2. simultaneous start / stop of both drivers A/B from input DI1 (case 2); input
always remains in standby. DI2 can be used for discharged battery alarm management.
Priority of digital inputs

In certain cases the setting of digital inputs 1 and 2 may be incompatible Relay outputs
(e.g. no regulation start/stop). The problem thus arises to determine which The relay outputs can be configured as:
function each driver needs to perform. • alarm relay output. See the chapter on Alarms;
Consequently, each type of function is assigned a priority, primary (PRIM) or • solenoid valve control;
secondary (SEC), as shown in the table: • electronic expansion valve status signal relay. The relay contact is only open
if the valve is closed (opening=0%). As soon as control starts (opening >0%,
DI1/DI2 configuration Type of function with hysteresis), the relay contact is closed
1=Disabled SEC Parameter/description Def.
2=Valve regulation optimization after defrost SEC CONFIGURATION
3=Discharged battery alarm management SEC Relay configuration: Alarm
4=Valve forced open (at 100%) SEC 1= Disabled; 2= Alarm relay (open when alarm active); relay
5=Regulation start/stop PRIM 3= Solenoid valve relay (open in standby); 4= Valve + alarm
6=Regulation backup PRIM relay (open in standby and control alarms)
7=Regulation security PRIM 5= Reversed alarm relay (closed in case of alarm); 6= Valve status
relay (open if valve is closed); 7 = Direct control; 8=Failed closing
There are four possible cases of digital input configurations with primary or alarm relay (opened with alarm); 9=Reverse failed closing alarm
secondary functions. relay (closed with alarm)
Tab. 6.f

ENG
6.5 Control status (*) The formula used is:
Apertura / Opening =
The electronic valve controller has 8 different types of control status, each of Min_step_EEV+(Max_step_EEV-Min_step_EEV)/100*25
which may correspond to a specific phase in the operation of the refrigeration
unit and a certain status of the controller-valve system.
The status may be as follows:
• forced closing: initialisation of the valve position when switching the
instrument on; 25% steps
0
• standby: no temperature control, unit OFF; Min_step_EEV Max_step_EEV
• wait: opening of the valve before starting control, also called pre- Fig. 6.b
positioning, when powering the unit and in the delay after defrosting;
• control: effective control of the electronic valve, unit ON; (**) In this case, the formula used is:
• positioning: step-change in the valve position, corresponding to the start
Apertura / Opening = P*(Max_step_EEV / 100)
of control when the cooling capacity of the controlled unit varies (only for P = Posizione valvola in stand-by / Position valve in stand-by
LAN EVD connected to a pCO);
• stop: end of control with the closing of the valve, corresponds to the end
of temperature control of the refrigeration unit, unit OFF;
• valve motor error recognition: see paragraph 9.5;
• tuning in progress: see paragraph 5.3 1% 99% steps
0% 100%
Min_step_EEV Max_step_EEV
Forced closing
Forced closing is performed after the controller is powered-up and Fig. 6.c
corresponds to a number of closing steps equal to the parameter “Closing
steps”, based on the type valve selected. This is used to realign the valve to Note: if “Valve open in standby=1”, the positions of the valve when
the physical position corresponding to completely closed. The driver and the setting “Valve position in standby”=0 and 25 do not coincide.
valve are then ready for control and both aligned at 0 (zero). On power-up, first Refer to the above formulae.
a forced closing is performed, and then the standby phase starts.

VALVE Prepositioning/start control
EEV closing steps 500 0 9999 step If during standby a control request is received, before starting control the
valve is moved to a precise initial position.
Tab. 6.g
The pre-position time is the time the valve is held in a steady position based
on the parameter “Valve opening at start-up”.
The valve is closed in the event of power failures with 24 Vac power supply
when the EVD0000UC0 module is connected. In this case, the parameter Parameter/description Def. Min. Max. UOM
“Forced valve closing not completed”, visible only on the supervisor, is forced CONTROL
to 1. If when restarting forced closing of the valve was not successful: Pre-position time 6 0 18000 s
1. the Master programmable controller checks the value of the parameter and Valve opening at start-up (evaporator/valve 50 0 100 %
if this is equal to 1, decides the best strategy to implement based on the capacity ratio)
application; Tab. 6.j
2. EVD Evolution twin does not make any decision and positions the valve as The valve opening parameter should be set based on the ratio between the
explained in the paragraph “Pre-positioning/start control”. The parameter rated cooling capacity of the evaporator and the valve (e.g. rated evaporator
is reset to 0 (zero) by the Master controller (e.g. pCO). EVD Evolution cooling capacity: 3kW, rated valve cooling capacity: 10kW, valve opening =
twin resets the parameter to 0 (zero) only if forced emergency closing is 3/10 = 33%).
completed successfully
Standby If the capacity request is 100%:

Standby corresponds to a situation of rest in which no signals are received to Opening (%)= (Valve opening at start-up);
control the electronic valve. This normally occurs when:
• the refrigeration unit stops operating, either when switched off manually
(e.g. from the button, supervisor) or when reaching the control set point; If the capacity request is less than 100% (capacity control):
• during defrosts, except for those performed by reversing of the cycle (or Opening (%)= (Valve opening at start-up) x (Current unit cooling capacity),
hot gas bypass). where the current unit cooling capacity is sent to the driver via pLAN by the
In general, it can be said that electronic valve control is in standby when the pCO controller. If the driver is stand-alone, this is always equal to 100%.
compressor stops or the control solenoid valve closes. The valve is closed or
open according to the setting of “Valve open in standby”. The percentage of Note:
opening is set using “Valve position in standby”. • this procedure is used to anticipate the movement and bring the valve
In this phase, manual positioning can be activated. significantly closer to the operating position in the phases immediately
after the unit starts;
Parameter/description Def. Min. Max. UOM • if there are problems with liquid return after the refrigeration unit starts or
CONTROL in units that frequently switch on-off, the valve opening at start-up must be
Valve open in standby 0 0 1 - decreased. If there are problems with low pressure after the refrigeration
0=disabled=valve closed; unit starts, the valve opening must be increased.
1=enabled = valve open 25%
Valve position in standby 0 0 100 %
0 = 25 % (*)
1…100% = % opening (**) Wait
Tab. 6.h When the calculated position has been reached, regardless of the time taken
These two parameters determine the position of the valve in standby based (this varies according to the type of valve and the objective position), there
on the minimum and maximum number of valve steps. is a constant 5 second delay before the actual control phase starts. This is to
create a reasonable interval between standby, in which the variables have no
Parameter/description Def. Min. Max. UOM meaning, as there is no flow of refrigerant, and the effective control phase.
VALVE
Minimum EEV steps 50 0 9999 step
Maximum EEV steps 480 0 9999 step
Tab. 6.i

ENG
Control Positioning (change cooling capacity)
The control request for each driver can be received, respectively, by the closing This control status is only valid for the pLAN controller.
of digital input 1 or 2, via the network (LAN). The solenoid or the compressor If there is a change in unit cooling capacity of at least 10%, sent from the pCO
are activated when the valve, following the pre-positioning procedure, has via the pLAN, the valve is positioned proportionally. In practice, this involves
reached the calculated position. The following figure represents the sequence repositioning starting from the current position in proportion to how much
of events for starting control of the refrigeration unit. the cooling capacity of the unit has increased or decreased in percentage
terms. When the calculated position has been reached, regardless of the time
taken (this varies according to the type of valve and the position), there is a
Control delay after defrost constant 5 second delay before the actual control phase starts.
Some types of refrigerating cabinets have problems controlling the electronic
valve in the operating phase after a defrost. In this period (10 to 20 min Note: if information is not available on the variation in unit cooling
after defrosting), the superheat measurement may be altered by the high capacity, this will always be considered as operating at 100% and therefore
temperature of the copper pipes and the air, causing excessive opening of the procedure will never be used. In this case, the PID control must be
the electronic valve for extended periods, in which there is return of liquid to more reactive (see the chapter on Control) so as to react promptly to
the compressors that is not detected by the probes connected to the driver. variations in load that are not communicated to the driver.
In addition, the accumulation of refrigerant in the evaporator in this phase
is difficult to dissipate in a short time, even after the probes have started to ON
correctly measure the presence of liquid (superheat value low or null). A
OFF
The driver can receive information on the defrost phase in progress, via the
digital input. The “Start delay after defrost” parameter is used to set a delay
when control resumes so as to overcome this problem. During this delay, ON t
C
the valve will remain in the pre-positioning point, while all the normal probe
OFF
alarm procedures, etc. are managed.
Parameter/description Def. Min. Max. UOM ON t

CONTROL NP
Start delay after defrost 10 0 60 min OFF
Tab. 6.k
ON t
Important: if the superheat temperature should fall below the set R
point, control resumes even if the delay has not yet elapsed. OFF
ON T3 W t
A
OFF Fig. 6.e
Key:
ON t A Control request T3 Repositioning time
S
OFF
C Change capacity W Wait
NP Repositioning t Time
R Control
ON t
P
OFF
Stop/end control
t The stop procedure involves closing the valve from the current position until
ON
R reaching 0 steps, plus a further number of steps so as to guarantee complete
OFF closing. Following the stop phase, the valve returns to standby.
T1 W T2 t A
ON
OFF
Fig. 6.d
Key:
ON t
A Control request W Wait S
S Standby T1 Pre-position time OFF
P Pre-positioning T2 Start delay after defrost
R Control t Time
ON t
ST
OFF
ON t
R
OFF
T4 t
Fig. 6.f
Key:
A Control request R Control
S Standby T4 Stop position time
ST Stop t Time

ENG
6.6 Special control status
As well as normal control status, the driver can have 3 special types of status
related to specific functions:
• manual positioning: this is used to interrupt control so as to move the
valve, setting the desired position;
• recover physical valve position: recover physical valve steps when fully
opened or closed.
Manual positioning
Manual positioning can be activated at any time during the standby or control
phase. Manual positioning, once enabled, is used to freely set the position of
the valve using the corresponding parameter.

CONTROL
Enable manual valve positioning 0 0 1 -
Manual valve position 0 0 9999 step
Stop manual positioning on network 0 0 1 -
error
0 = Normal operation; 1 = Stop
Tab. 6.l
Control is placed on hold, all the system and control alarms are enabled,
however neither control nor the protectors can be activated. Manual
positioning thus has priority over any status/protection of the driver.
When the driver is connected to the network (for example to a pCO controller),
in presence of an communication-error (LAN error), manual positioning can
be inhibited temporarily by the parameter and the driver recognizes the start/
stop regulation, depending on the configuration of the digital inputs.
Note:
• the manual positioning status is NOT saved when restarting after a power
failure;
• in for any reason the valve needs to be kept stationary after a power failure,
proceed as follows:
- remove the valve stator;
- in Manufacturer programming mode, under the configuration
parameters, set the PID proportional gain =0. The valve will remain
stopped at the initial opening position, set by corresponding parameter.
Recover physical valve position

VALVE
Synchronise valve position in opening 1 0 1 -
Synchronise valve position in closing 1 0 1 -
Tab. 6.m
This procedure is necessary as the stepper motor intrinsically tends to lose
steps during movement. Given that the control phase may last continuously
for several hours, it is probable that from a certain time on the estimated
position sent by the valve controller does not correspond exactly to the
physical position of the movable element. This means that when the driver
reaches the estimated fully closed or fully open position, the valve may
physically not be in that position. The “Synchronisation” procedure allows the
driver to perform a certain number of steps in the suitable direction to realign
the valve when fully opened or closed.
Note:
• realignment is in intrinsic part of the forced closing procedure and is
activated whenever the driver is stopped/started and in the standby phase;
• the possibility to enable or disable the synchronisation procedure depends
on the mechanics of the valve. When the setting the “valve” parameter, the
two synchronisation parameters are automatically defined. The default
values should not be changed.

ENG
7. PROTECTORS
When the superheat value falls below the threshold, the system enters low
Note: the HiTcond and reverse HiTcond protectors can be activated superheat status, and the intensity with which the valve is closed is increased:
if EVD Evolution twin works as a single driver (see Appendix 2) or if the more the superheat falls below the threshold, the more intensely the valve
programmable control is activated (see chap. on Control). will close. The LowSH threshold, must be less than or equal to the superheat
set point. The low superheat integration time indicates the intensity of the
These are additional functions that are activated in specific situations that are action: the lower the value, the more intense the action.
potentially dangerous for the unit being controlled. They feature an integral
action, that is, the action increases gradually when moving away from the The integral time is set automatically based on the type of main control.
activation threshold. They may add to or overlap (disabling) normal PID
superheat control. By separating the management of these functions from PID
SH
control, the parameters can be set separately, allowing, for example, normal
control that is less reactive yet much faster in responding when exceeding the Low_SH_TH
activation limits of one of the protectors.
ON t
Low_SH
OFF
7.1 Protectors
There are 3 protectors: ON t
• LowSH, low superheat; A
• LOP, low evaporation temperature; OFF
• MOP, high evaporation temperature;
D B t
The protectors have the following main features:
Fig. 7.a
• activation threshold: depending on the operating conditions of the Key:
controlled unit, this is set in Service programming mode; SH Superheat A Alarm
• integral time, which determines the intensity (if set to 0, the protector is Low_SH_TH Low_SH protection threshold D Alarm delay
disabled): set automatically based on the type of main control; Low_SH Low_SH protection t Time
• alarm, with activation threshold (the same as the protector) and delay (if set B Automatic alarm reset
to 0 disables the alarm signal).
Note: the alarm signal is independent from the effectiveness of

the protector, and only signals that the corresponding threshold has been LOP (low evaporation pressure)
exceeded. If a protector is disabled (null integration time), the relative alarm LOP= Low Operating Pressure
signal is also disabled. The LOP protection threshold is applied as a saturated evaporation
temperature value so that it can be easily compared against the technical
Each protector is affected by the proportional gain parameter (K) for the PID specifications supplied by the manufacturers of the compressors. The
superheat control. The higher the value of K, the more intense the reaction of protector is activated so as to prevent too low evaporation temperatures from
the protector will be. stopping the compressor due to the activation of the low pressure switch.
The protector is very useful in units with compressors on board (especially
multi-stage), where when starting or increasing capacity the evaporation
Characteristics of the protectors temperature tends to drop suddenly.
When the evaporation temperature falls below the low evaporation
Protection Reaction Reset
temperature threshold, the system enters LOP status and is the intensity
LowSH Intense closing Immediate
with which the valve is opened is increased. The further the temperature falls
LOP Intense opening Immediate
below the threshold, the more intensely the valve will open. The integral time
MOP Moderate closing Controlled
indicates the intensity of the action: the lower the value, the more intense
Tab. 7.a
the action.
Reaction: summary description of the type of action in controlling the valve. Parameter/description Def. Min. Max. UOM
Reset: summary description of the type of reset following the activation CONTROL
of the protector. Reset is controlled to avoid swings around the activation LOP protection: threshold -50 -60 MOP protection: °C (°F)
threshold or immediate reactivation of the protector. (-76) threshold
LOP protection: integral time 0 0 800 s
ALARM CONFIGURATION
Low evaporation temperature 300 0 18000 s
LowSH (low superheat) alarm delay (LOP)
The protector is activated so as to prevent the return of liquid to the (0= alarm disabled)
compressor due to excessively low superheat values. Tab. 7.c
CONTROL The integral time is set automatically based on the type of main control.
LowSH protection: threshold 5 -40 (-72) SH set point K (°F)
LowSH protection: integral time 15 0 800 s
ALARM CONFIGURATION
Low superheat alarm delay 300 0 18000 s
(LowSH) (0= alarm disabled)
Tab. 7.b

ENG
When the evaporation temperature rises above the MOP threshold, the system
Note: enters MOP status, superheat control is interrupted to allow the pressure to
• the LOP threshold must be lower then the rated evaporation temperature be controlled, and the valve closes slowly, trying to limit the evaporation
of the unit, otherwise it would be activated unnecessarily, and greater than temperature. As the action is integral, it depends directly on the difference
the calibration of the low pressure switch, otherwise it would be useless. As between the evaporation temperature and the activation threshold. The more
an initial approximation it can be set to a value exactly half-way between the evaporation temperature increases with reference to the MOP threshold,
the two limits indicated; the more intensely the valve will close. The integral time indicates the intensity
• the protector has no purpose in multiplexed systems (showcases) where of the action: the lower the value, the more intense the action.
the evaporation is kept constant and the status of the individual electronic
valve does not affect the pressure value;
T_EVAP
• the LOP alarm can be used as an alarm to highlight refrigerant leaks by
the circuit. A refrigerant leak in fact causes an abnormal lowering of the MOP_TH
evaporation temperature that is proportional, in terms of speed and extent, MOP_TH - 1
to the amount of refrigerant dispersed;
• if the measured superheat is lower than the set point the LOP protection ON t
does not work. MOP
OFF
T_EVAP
LOP_TH ON t
PID
OFF
ON t
LOP ON
t
OFF ALARM
OFF
t
A
ON D t
OFF
Fig. 7.c
D B t Key:
Fig. 7.b T_EVAP Evaporation temperature MOP_TH MOP threshold
Key: PID PID superheat control ALARM Alarm
MOP MOP protection t Time
T_EVAP Evaporation temperature D Alarm delay D Alarm delay
LOP_TH Low evaporation temperature ALARM Alarm
protection threshold
LOP LOP protection t Time Important: the MOP threshold must be greater than the rated
B Automatic alarm reset evaporation temperature of the unit, otherwise it would be activated
unnecessarily. The MOP threshold is often supplied by the manufacturer of
the compressor. It is usually between 10°C and 15 °C.
MOP (high evaporation pressure)
MOP= Maximum Operating Pressure. If the closing of the valve also causes an excessive increase in the suction
temperature (S2) above the set threshold – only set via supervisor (PlantVisor,
The MOP protection threshold is applied as a saturated evaporation pCO, VPM), not on the display - the valve will be stopped to prevent
temperature value so that it can be easily compared against the technical overheating the compressor windings, awaiting a reduction in the refrigerant
specifications supplied by the manufacturers of the compressors. The charge. If the MOP protection function is disabled by setting the integral time
protector is activated so as to prevent too high evaporation temperatures to zero, the maximum suction temperature control is also deactivated.
from causing an excessive workload for the compressor, with consequent
overheating of the motor and possible activation of the thermal protector. Parameter/description Def. Min. Max. UOM
The protector is very useful in units with compressor on board if starting with CONTROL
a high refrigerant charge or when there are sudden variations in the load. MOP protection: suction temperature 30 -60 (-72) 200 (392) °C(°F)
The protector is also useful in multiplexed systems (showcases), as allows threshold
all the utilities to be enabled at the same time without causing problems of Tab. 7.e
high pressure for the compressors. To reduce the evaporation temperature,
the output of the refrigeration unit needs to be decreased. This can be done At the end of the MOP protection function, superheat control restarts in a
by controlled closing of the electronic valve, implying superheat is no longer controlled manner to prevent the evaporation temperature from exceeding
controlled, and an increase in the superheat temperature. The protector the threshold again..
will thus have a moderate reaction that tends to limit the increase in the If the suction temperature is greater than or equal to the set temperature
evaporation temperature, keeping it below the activation threshold while protection threshold, the MOP protection does not work.
trying to stop the superheat from increasing as much as possible. Normal
operating conditions will not resume based on the activation of the protector,
but rather on the reduction in the refrigerant charge that caused the increase
in temperature. The system will therefore remain in the best operating
conditions (a little below the threshold) until the load conditions change.

CONTROL
MOP protection: threshold 50 LOP protection: 200 °C (°F)
threshold (392)
ALARM CONFIGURATION
High evaporation temperature 600 0 18000 s
alarm delay (MOP)
(0= alarm disabled)
Tab. 7.d
The integral time is set automatically based on the type of main control.

ENG
8. TABLE OF PARAMETERS
8.1 Table of parameters, driver A
Modbus®
Type **
CAREL
SVP
user *
Parameter/description Def. Min. Max. UOM Note
CONFIGURATION
A Network address pLAN: 30 1 207 - I 11 138 CO
others: 198
A Refrigerant: R404A - - - I 13 140 -
0= user defined;
1= R22 2= R134a 3= R404A 4= R407C 5= R410A
6= R507A 7= R290 8= R600 9= R600a 10= R717
11= R744 12= R728 13= R1270 14= R417A 15= R422D
16= R413A 17= R422A 18= R423A 19= R407A 20= R427A
21= R245FA 22= R407F 23= R32 24= HTR01 25= HTR02
26= R23 27 = R1234yf 28 = R1234ze 29 = R455A 30 = R170
31 = R442A 32 = R447A 33 = R448A 34 = R449A 35 = R450A
36 = R452A 37 = R508B 38 = R452B 39 = R513A 40 = R454B
41 = R458A
A Valve: CAREL EXV - - - I 14 141
0= user defined 13= Sporlan SEH 175 26= CAREL ejector
E2J23AT1N0
1= CAREL E V X
14= Danfoss ETS 12.5-25B 27= CAREL ejector
E3J26AT2N0
2= Alco EX4 15= Danfoss ETS 50B 28= CAREL ejector
E3J33AU2N0
E3J39AV3N0
4= Alco EX6 17= Danfoss ETS 250 30= CAREL ejector
E6J50AV3N0
5= Alco EX7 18= Danfoss ETS 400 31= Danfoss CCMT 16
6= Alco EX8 330Hz 19= Two EXV CAREL con- 32= Danfoss CCMT 24
recommend CAREL nected together
7= Alco EX8 500Hz 20= Sporlan SER(I)G,J,K 33= Danfoss CCMT 30
specific Alco
8= Sporlan SEI 0.5-11 21= Danfoss CCM 10-20-30 34= Danfoss CCMT 42
9= Sporlan SER 1.5-20 22= Danfoss CCM 40 35= Danfoss Colibri
10= Sporlan SEI 30 23= Danfoss CCM T 2-4-8
11= Sporlan SEI 50 24= Disabled
12= Sporlan SEH 100 25= CAREL ejector E2J17AS1N0
A Probe S1: Ratiometric: - - - I 16 143 CO
0= user defined -1 to 9.3 barg
Ratiometric (OUT=0 to 5 V) Electronic (OUT=4 - 20 mA)
1= -1 to 4.2 barg 8= -0.5 to 7 barg
2= 0.4 to 9.3 barg 9= 0 to 10 barg
3= -1 to 9.3 barg 10= 0 to 18.2 bar
4= 0 to 17.3 barg 11= 0 to 25 barg
5= 0.85 to 34.2 barg 12= 0 to 30 barg
6= 0 to 34.5 barg 13= 0 to 44.8 barg
21= -1 to 12.8 barg 15= remote, 0 to 10 barg
22= 0 to 20.7 barg 16= remote, 0 to 18.2 barg
23= 1.86 to 43.0 barg 17= remote, 0 to 25 barg
24= CAREL liquid level 18= remote, 0 to 30 barg
25 = 0...60,0 barg 19= remote, 0 to 44.8 barg
26 = 0...90,0 barg 20= 4 to 20mA external signal
27 = external signal 0…5 V
A Main control: Multiplexed - - - I 15 142 -
0= user defined; showcase/
1= Multiplexed showcase/cold room cold room
2= Showcase/cold room with compressor on board
3= “Perturbed” showcase/cold room
4= Showcase/cold room with sub-critical CO2
5= R404A condenser for sub-critical CO2
6= Air-conditioner/chiller with plate heat exchanger
7= Air-conditioner/chiller with tube bundle heat exchanger
8= Air-conditioner/chiller with finned coil heat exchanger
9= Air-conditioner/chiller with variable cooling capacity
10= “Perturbed” air-conditioner/chiller
12= Hot gas bypass by pressure
13= Hot gas bypass by temperature
14= Transcritical CO2 gas cooler
15= Analogue positioner (4 to 20 mA)
16= Analogue positioner (0 to 10 V)
17= Air-conditioner/chiller or showcase/cold room with adaptive control
18= Air-conditioner/chiller with Digital Scroll compressor (*)
19= AC or chiller with BLDC scroll compressor (CANNOT BE SELECTED)
20= superheat regulation with 2 temperature probes (CANNOT BE SELECTED)
21= I/O expander for pCO (**)
22= Programmable SH regulation
25= Evaporator liquid level regulation with CAREL sensor
26= Condenser liquid level regulation with CAREL sensor
(*) only for controls for CAREL valves
(**) common parameter between driver A and driver B

ENG
Modbus®
Type **
CAREL
SVP
user *
A Probe S2: CAREL NTC - - - I 17 144 CO

0= user defined 1= NTC CAREL
2= CAREL NTC- HT high 3= combined NTC SPKP**T0
4= 0 to 10V external signal 5= NTC – LT CAREL low temperature
A Auxiliary control: - - - - I 18 145 CO
0= user defined
1= Disabled
2= high condensing temperature protection on S3 probe
3= modulating thermostat on S4 probe
4= backup probes on S3 and S4
5, 6, 7 = Reserved
8= Subcooling measurement
9= Inverse high condensation temperature protection on S3 probe
10= Reserved
0= user defined -1 to 9.3 barg
1= -1 to 4.2 barg 8= -0.5 to 7 barg
2=-0.4…9.3 barg 9= 0 to 10 barg
3= -1 to 9.3 barg 10= 0 to 18.2 bar
4= 0 to 17.3 barg 11= 0 to 25 barg
5= 0.85 to 34.2 barg 12= 0 to 30 barg
6= 0 to 34.5 barg 13= 0 to 44.8 barg
15= remote, 0 to 10 barg
16= remote, 0 to 18.2 barg
20= 4 to 20mA external signal
21= -1 to 12.8 barg
22= 0 to 20.7 barg
23= 1.86 to 43.0 barg)
24= CAREL liquid level
25 = 0...60,0 barg
26 = 0...90,0 barg
A Relay configuration: Alarm relay - - - I 12 139 -
1= Disabled
2= Alarm relay (open when alarm active)
3= Solenoid valve relay (open in standby)
4= Valve + alarm relay (open in standby and control alarms)
5= Reversed alarm relay (closed in case of alarm)
6= Valve status relay (open if valve is closed)
7= Direct command
8= Faulty closure alarm relay (opened if alarm)
9= Reverse faulty closure alarm relay (closed if alarm)
A Probe S4: CAREL NTC - - - I 20 147 -
0= User defined
1= CAREL NTC
2= CAREL NTC-HT high temperature
3= Combined NTC SPKP**T0
4= ---
5= NTC-LT CAREL low temperature
A DI2 Configuration: Regulation - - - I 10 137 CO
1= Disabled start/stop
2= Valve regulation optimization after defrost (tLAN-RS485)
3= Discharged battery alarm management / Regulation
4= Valve forced open (at 100%) backup
5= Regulation start/stop (pLAN)
6= Regulation backup
7= Regulation security
C Variable 1 on display: Superheat - - - I 45 172 -
1= Valve opening
2= Valve position
3= Current cooling capacity
4= Set point control
5= Superheat
6= Suction temperature
7= Evaporation temperature
8= Evaporation pressure
9= Condensing temperature
10= Condensing pressure
11= Modulating thermostat temperature(*)
12= EPR pressure
13= Hot gas bypass pressure
14= Hot gas bypass temperature
15= CO2 gas cooler outlet temperature
16= CO2 gas cooler outlet pressure
17= CO2 gas cooler pressure set point
18= Probe S1 reading
22= 4 to 20 mA input
23= 0 to 10 V input
(*) CANNOT BE SELECTED

ENG
Modbus®
Type **
CAREL
SVP
user *
C Variable 2 on display (see variable 1 on display) Valve ope- - - - I 46 173 -

ning
C Probe S1 alarm management: Valve in fixed - - - I 24 151 CO
1= No action position
2= Forced valve closing
3= Valve in fixed position
4= Use backup probe S3 (*)
C Probe S3 alarm management: No action - - - I 26 153 CO
1= No action
1= No action
C Unit of measure: 1= °C/K/barg; 2= °F/psig °C/K/barg - - - I 21 148 CO
A DI1 configuration Regulation - - - I 85 212 CO
C Language: Italiano; English Italiano - - - CO
C Auxiliary refrigerant R404A - - - I 96 223 CO
-1= user defined; 0 = same as main regulation
1= R22 2= R134a 3= R404A 4= R407C 5= R410A
6= R507A 7= R290 8= R600 9= R600a 10= R717
11= R744 12= R728 13= R1270 14= R417A 15= R422D
16= R413A 17= R422A 18= R423A 19= R407A 20= R427A
21= R245FA 22= R407F 23=R32 24=HTR01 25= HTR02
26=R23 27 = R1234yf 28 = R1234ze 29 = R455A 30 = R170
31 = R442A 32 = R447A 33 = R448A 34 = R449A 35 = R450A
36 = R452A 37 = R508B 38 = R452B 39 = R513A 40 = R454B
41 = R458A
PROBES
C S1: calibration offset 0 -60(-870), -60 60(870), 60 barg (psig) A 34 33 CO
mA
C S1: calibration gain, 4 to 20 mA 1 -20 20 - A 36 35 CO
C Pressure S1: MINIMUM value -1 -20 (-290) Pressure S1: barg (psig) A 32 31 CO
MAXIMUM
value
C Pressure S1: MAXIMUM value 9.3 Pressure S1: 200 (2900) barg (psig) A 30 29 CO
MINIMUM
value
C Pressure S1: MINIMUM alarm value -1 -20 (-290) Pressure S1: barg (psig) A 39 38 CO
MAXIMUM
alarm value
C Pressure S1: MAXIMUM alarm value 9.3 Pressure S1: 200 (2900) barg (psig) A 37 36 CO
MINIMUM
alarm value
C S2: calibration offset 0 -20 (-36), -20 20 (36), 20 °C (°F), volt A 41 40 CO
C S2: calibration gain, 0 to 10 V 1 -20 20 - A 43 42 CO
C Temperature S2: MINIMUM alarm value -50 -85(-121) Temperature °C (°F) A 46 45 CO
S2: MAXIMUM
alarm value
C Temperature S2: MAXIMUM alarm value 105 Temperature 200 (392) °C (°F) A 44 43 CO
S2: MINIMUM
alarm value
C S3: calibration offset 0 -60 (-870) 60 (870) barg (psig) A 35 34 CO
C Pressure S3 : MINIMUM value -1 -20 (-290) Pressure S3: barg (psig) A 33 32 CO
MAXIMUM
value
MINIMUM
value
MAXIMUM
alarm value
MINIMUM
alarm value
C S4: calibration offset 0 -20 (-36) 20 (36) °C (°F) A 42 41 CO
S4: MAXIMUM
alarm value
ENG
Modbus®
Type **
CAREL
SVP
user *
S4: MINIMUM
alarm value
C Maximum difference S1/S3 (pressure) 0 0 200(2900) bar(psig) A 114 113 CO
C Maximum difference S2/S4 (temperature) 0 0 180(324) °C (°F) A 115 114 CO
C Alarm delay S1 0 0 240 s I 131 258 CO
C Enable S1 0 0 1 - D 16 15 CO
C Enable S2 0 0 1 - D 17 16 CO
C Enable S3 0 0 1 - D 18 17 CO
C Enable S4 0 0 1 - D 19 18 CO
CONTROL
A Superheat set point 11 LowSH: 180 (324) K (°F) A 50 49 -
threshold
A Valve opening at start-up (evaporator/valve capacity ratio) 50 0 100 % I 37 164 -
C Valve open in standby 0 0 1 - D 23 22 -
(0= disabled= valve closed; 1=enabled = valve open according
to parameter “Valve position in stand-by”)
C Valve position in stand-by 0 0 100 % I 91 218 -
0 = 25%
1…100% = % opening
C start-up delay after defrost 10 0 60 min I 40 167 -
A Pre-position time 6 0 18000 s I 90 217
A Hot gas bypass temperature set point 10 -85(-121) 200 (392) °C (°F) A 28 27 -
A Hot gas bypass pressure set point 3 -20 (-290) 200 (2900) barg (psig) A 62 61 -
A EPR pressure set point 3.5 -20 (-290) 200 (2900) barg (psig) A 29 28 -
C PID: proportional gain 15 0 800 - A 48 47 -
C PID: integral time 150 0 1000 s I 38 165 -
C PID: derivative time 5 0 800 s A 49 48 -
A LowSH protection: threshold 5 -40 (-72) SH set point K (°F) A 56 55 -
C LowSH protection: integral time 15 0 800 s A 55 54 -
A LOP protection: threshold -50 -85(-121) MOP protec- °C (°F) A 52 51 -
tion: threshold
C LOP protection: integral time 0 0 800 s A 51 50 -
A MOP protection: threshold 50 LOP protec- 200 (392) °C (°F) A 54 53 -
tion: threshold
C MOP protection: integral time 20 0 800 s A 53 52 -
A Enable manual valve positioning 0 0 1 - D 24 23 -
A Manual valve position 0 0 9999 step I 39 166 -
C Discharge superheat setpoint (CANNOT BE SELECTED) 35 -40(-72) 180 (324) K (F°) A 100 99
C Discharge temperature setpoint (CANNOT BE SELECTED) 105 -85(-121) 200 (392) °C (°F) A 101 100
C Liquid level set point 50 0 100 % A 119 118 -
SPECIAL
A HiTcond: threshold - SELECT WITH PROG. CONT. 80 -85(-121) 200 (392) °C (°F) A 58 57 -
C HiTcond: integral time - SELECT WITH PROG. CONT. 20 0 800 s A 57 56 -
A Modulating thermostat: set point - SELECT WITH PROG. CONT. 0 -85(-121) 200 (392) °C (°F) A 61 60 -
A Modulating thermostat: differential - SELECT WITH PROG. CONT. 0. 1 0.1 (0.2) 100 (180) °C (°F) A 60 59 -
C Mod. thermostat: SH set point offset - SELECT WITH PROG. CONT. 0 0 (0) 100 (180) K (°F) A 59 58 -
C Coefficient ‘A’ for CO2 control 3.3 -100 800 - A 63 62 -
C Coefficient ‘B’ for CO2 control -22.7 -100 800 - A 64 63 -
C Impostazioni di rete 2 0 30 - I 74 201 CO
Parity Bit di stop Baud rate
0 no parity 2 stop bits 4800 bps
4 no parity 1 stop bit 4800 bps
16 even 2 stop bits 4800 bps
20 even 1 stop bit 4800 bps
24 odd 2 stop bits 4800 bps
28 odd 1 stop bit 4800 bps
A Power supply mode 0 0 1 - D 47 46 CO
0= 24 Vac; 1= 24 Vdc
C Enable mode single on twin (parameter disabled) 0 0 1 - D 58 57 CO
0= Twin; 1= Single
C Stop manual positioning if net error 0 0 1 - D 59 58 CO
C Programmable regulation configuration 0 0 32767 - I 101 228
C Programmable regulation input 0 0 32767 - I 102 229
ENG
Modbus®
Type **
CAREL
SVP
user *
C Programmable SH regulation options 0 0 32767 - I 103 230

C Programmable regulation set point 0 -800(-1233) 800(1233) - A 112 111
C CUSTOMIZED REFRIGERANT
Dew a high -288 -32768 32767 - I 107 234
Dew a low -15818 -32768 32767 - I 108 235
Dew b high -14829 -32768 32767 - I 109 236
Dew b low 16804 -32768 32767 - I 110 237
Dew c high -11664 -32768 32767 - I 111 238
Dew c low 16416 -32768 32767 - I 112 239
Dew d high -23322 -32768 32767 - I 113 240
Dew d low -16959 -32768 32767 - I 114 241
Dew e high -16378 -32768 32767 - I 115 242
Dew e low 15910 -32768 32767 - I 116 243
Dew f high -2927 -32768 32767 - I 117 244
Dew f low -17239 -32768 32767 - I 118 245
Bubble a high -433 -32768 32767 - I 119 246
Bubble a low -15815 -32768 32767 - I 120 247
Bubble b high -15615 -32768 32767 - I 121 248
Bubble b low 16805 -32768 32767 - I 122 249
Bubble c high 30803 -32768 32767 - I 123 250
Bubble c low 16416 -32768 32767 - I 124 251
Bubble d high -21587 -32768 32767 - I 125 252
Bubble d low -16995 -32768 32767 - I 126 253
Bubble e high -24698 -32768 32767 - I 127 254
Bubble e low 15900 -32768 32767 - I 128 255
Bubble f high 10057 -32768 32767 - I 129 256
Bubble f low -17253 -32768 32767 - I 130 257
C Faulty closure alarm status 0 0 1 - D 49 48
0/1=no/yes
C Battery charge delay 0 0 250 min I 135 262 CO
ALARM CONFIGURATION
C Low superheat alarm delay (LowSH) 300 0 18000 s I 43 170 -
(0= alarm disabled)
C Low evaporation temperature alarm delay (LOP) 300 0 18000 s I 41 168 -
(0= alarm disabled)
C High evaporation temperature alarm delay (MOP) 600 0 18000 s I 42 169 -
(0= alarm disabled)
C High condensing temperature alarm delay (HiTcond) 600 0 18000 s I 44 171 CO
SELECT WITH PROG. CONT.
C Low suction temperature alarm threshold -50 -85 (-121) 200 (392) °C (°F) A 26 25 -
C Low suction temperature alarm delay 300 0 18000 s I 9 136 -
(0= alarm disabled)
VALVE
C EEV minimum steps 50 0 9999 step I 30 157 -
C EEV maximum steps 480 0 9999 step I 31 158 -
C EEV closing steps 500 0 9999 step I 36 163 -
C EEV rated speed 50 1 2000 step/s I 32 159 -
C EEV rated current 450 0 800 mA I 33 160 -
C EEV holding current 100 0 250 mA I 35 162 -
C EEV duty cycle 30 1 100 % I 34 161 -
C Synchronise position in opening 1 0 1 - D 20 19 -
C Synchronise position in closing 1 0 1 - D 21 20 -
Tab. 8.a
* User level: A= Service (installer), C= manufacturer.

** Type of variable: A= Analogue; D= Digital; I= Integer
CO= parameter settable from driver A or from driver B

ENG
8.2 Table of parameters, driver B
CAREL SVP
Modbus®
Type **
user *
CONFIGURATION
A Network address pLAN: 30 1 207 - I 11 138 CO
altri: 198
A Refrigerant: R404A - - - I 55 182 -
0= User defined;
1= R22 2= R134a 3= R404A 4= R407C 5= R410A
6= R507A 7= R290 8= R600 9= R600a 10= R717
11= R744 12= R728 13= R1270 14= R417A 15= R422D
16= R413A 17= R422A 18= R423A 19= R407A 20= R427A
21= R245FA 22= R407F 23=R32 24=HTR01 25= HTR02
26=R23 27 = R1234yf 28 = R1234ze 29 = R455A 30 = R170
31 = R442A 32 = R447A 33 = R448A 34 = R449A 35 = R450A
36 = R452A 37 = R508B 38 = R452B 39 = R513A 40 = R454B
41 = R458A
A Valve: CAREL EXV - - - I 54 181
0= user defined 13= Sporlan SEH 175 26= CAREL ejector
E2J23AT1N0
1= CAREL EXV 14= Danfoss ETS 27= CAREL ejector
12.5-25B E3J26AT2N0
E3J33AU2N0
E3J39AV3N0
4= Alco EX6 17= Danfoss ETS 250 30= CAREL ejector
E6J50AV3N0
5= Alco EX7 18= Danfoss ETS 400 31= Danfoss CCMT 16
6= Alco EX8 330Hz 19= Two EXV CAREL 32= Danfoss CCMT 24
recommend CAREL connected together
7= Alco EX8 500Hz 20= Sporlan SER(I)G,J,K 33= Danfoss CCMT 30
specific Alco
8= Sporlan SEI 0.5-11 21= Danfoss CCM 34= Danfoss CCMT 42
10-20-30
9= Sporlan SER 1.5-20 22= Danfoss CCM 40 35= Danfoss Colibri
10= Sporlan SEI 30 23= Danfoss CCM T
2-4-8
11= Sporlan SEI 50 24= Disabled
12= Sporlan SEH 100 25= CAREL ejector
E2J17AS1N0
0= User defined; -1 to 9.3 barg
1= -1 to 4.2 barg 8= -0.5 to 7 barg
2=-0.4…9.3 barg 9= 0 to 10 barg
3= -1 to 9.3 barg 10= 0 to 18.2 bar
4= 0 to 17.3 barg 11= 0 to 25 barg
5= 0.85 to 34.2 barg 12= 0 to 30 barg
6= 0 to 34.5 barg 13= 0 to 44.8 barg
21= -1 to 12.8 barg
22= 0 to 20.7 barg
23= 1.86 to 43.0 barg
25 = 0...60,0 barg
26 = 0...90,0 barg

ENG
CAREL SVP
Modbus®
Type **
user *
A Main control: Multiplexed - - - I 56 183 -

1= Multiplexed showcase/cold room showcase/
2= Showcase/cold room with compressor on board cold room
3= “Perturbed” showcase/cold room
4= Showcase/cold room with sub-critical CO2
5= R404A condenser for sub-critical CO2
6= Air-conditioner/chiller with plate heat exchanger
7= Air-conditioner/chiller with tube bundle heat exchanger
8= Air-conditioner/chiller with finned coil heat exchanger
9= Air-conditioner/chiller with variable cooling capacity
10= “Perturbed” air-conditioner/chiller
12= Hot gas bypass by pressure
13= Hot gas bypass by temperature
14= Transcritical CO2 gas cooler
15= Analogue positioner (4 to 20 mA)
16= Analogue positioner (0 to 10 V)
17= Air-conditioner/chiller or showcase/cold room with adaptive control
18= Air-conditioner/chiller with Digital Scroll compressor (*)
19= AC or chiller with BLDC scroll compressor (CANNOT BE SELECTED)
20= superheat regulation with 2 temperature probes (CANNOT BE
SELECTED)
21= I/O expander for pCO (**)
22= Programmable SH regulation
25= Evaporator liquid level regulation with CAREL sensor
26= Condenser liquid level regulation with CAREL sensor
(*)= control only settable on driver A, however corresponds to the
entire controller
0= user defined 1= CAREL NTC
2= CAREL NTC-HT high temp. 3= combined NTC SPKP**T0
4= 0 to 10V external signal 5= NTC – LT CAREL low temperature
A Auxiliary control: - - - - I 18 145 CO
0= user defined
1= Disabled
2= high condensing temperature protection on S3 probe
3= modulating thermostat on S4 probe
4= backup probes on S3 and S4
5, 6, 7 = Reserved
8= Subcooling measurement
9= Inverse high condensation temperature protection on S3 probe
10= Reserved
0= User defined; -1 to 9.3 barg
1= -1 to 4.2 barg 8= -0.5 to 7 barg
2= 0.4 to 9.3 barg 9= 0 to 10 barg
3= -1 to 9.3 barg 10= 0 to 18.2 bar
4= 0 to 17.3 barg 11= 0 to 25 barg
5= 0.85 to 34.2 barg 12= 0 to 30 barg
6= 0 to 34.5 barg 13= 0 to 44.8 barg
21= -1 to 12.8 barg
22= 0 to 20.7 barg
23= 1.86 to 43.0 barg
25 = 0...60,0 barg
26 = 0...90,0 barg

ENG
CAREL SVP
Modbus®
Type **
user *
A Relay configuration: Alarm relay - - - I 57 184 -

1= Disabled
2= Alarm relay (open when alarm active)
3= Solenoid valve relay (open in standby)
4= Valve + alarm relay (open in standby and control alarms)
5= Reversed alarm relay (closed in case of alarm)
6= Valve status relay (open if valve is closed)
7= Direct command
8= Faulty closure alarm relay (opened if alarm)
9= Reverse faulty closure alarm relay (closed if alarm)
0= User defined
1= CAREL NTC
2= CAREL NTC-HT high temperature
3= Combined NTC SPKP**T0
4= ---
5= NTC-LT CAREL low temperature
A DI2 Configuration: Regulation - - - I 10 137 CO
C Variable 1 on display: Superheat - - - I 58 185 -
1= Valve opening
2= Valve position
3= Current cooling capacity
4= Set point control
5= Superheat
6= Suction temperature
7= Evaporation temperature
8= Evaporation pressure
9= Condensing temperature
10= Condensing pressure
11= Modulating thermostat temperature(*)
12= EPR pressure
13= Hot gas bypass pressure
14= Hot gas bypass temperature
15= CO2 gas cooler outlet temperature
16= CO2 gas cooler outlet pressure
17= CO2 gas cooler pressure set point
22= 4 to 20 mA input
23= 0 to 10 V input
C Variable 2 on display (see variable 1 on display) Valve ope- - - - I 59 186 -
ning
1= No action
1= No action
C Unit of measure: 1= °C/K/barg; 2= °F/psig °C/K/barg - - - I 21 148 CO

ENG
CAREL SVP
Modbus®
Type **
user *
A DI1 configuration Regulation - - - I 85 212 CO

C Language: Italiano; English Italiano - - - - - - CO
C Auxiliary refrigerant R404A - - - I 96 223 CO
-1= User defined; 0 = same as main regulation
1= R22 2= R134a 3= R404A 4= R407C 5= R410A
6= R507A 7= R290 8= R600 9= R600a 10= R717
11= R744 12= R728 13= R1270 14= R417A 15= R422D
16= R413A 17= R422A 18= R423A 19= R407A 20= R427A
21= R245FA 22= R407F 23=R32 24=HTR01 25= HTR02
26=R23 27 = R1234yf 28 = R1234ze 29 = R455A 30 = R170
31 = R442A 32 = R447A 33 = R448A 34 = R449A 35 = R450A
36 = R452A 37 = R508B 38 = R452B 39 = R513A 40 = R454B
41 = R458A
PROBES
C S1: calibration offset 0 -60(-870), -60 60(870), 60 barg (psig) A 34 33 CO
mA
C Pressure S1: MINIMUM value -1 -20 (-290) Pressure S1: barg (psig) A 32 31 CO
MAXIMUM
value
MINIMUM
value
MAXIMUM
alarm value
MINIMUM
alarm value
C S2: calibration offset 0 -20 (-36), -20 20 (36), 20 °C (°F), volt A 41 40 CO
C S2: calibration gain, 0 to 10 V 1 -20 20 - A 43 42 CO
S2: MAXIMUM
alarm value
S2: MINIMUM
alarm value
C S3: calibration offset 0 -60 (-870) 60 (870) barg (psig) A 35 34 CO
C Pressure S3 : MINIMUM value -1 -20 (-290) Pressure S3: barg (psig) A 33 32 CO
MAXIMUM
value
MINIMUM
value
MAXIMUM
alarm value
MINIMUM
alarm value
C S4: calibration offset 0 -20 (-36) 20 (36) °C (°F) A 42 41 CO
S4: MAXIMUM
alarm value
S4: MINIMUM
alarm value
C S1/S3 Maximum difference (pressure) 0 0 200(2900) bar(psig) A 114 113 CO
C S2/S4 Maximum difference (temperature) 0 0 180(324) °C (°F) A 115 114 CO
C Enable S1 0 0 1 - D 16 15 CO
C Enable S2 0 0 1 - D 17 16 CO
C Enable S3 0 0 1 - D 18 17 CO
C Enable S4 0 0 1 - D 19 18 CO

ENG
CAREL SVP
Modbus®
Type **
user *
CONTROL
A Superheat set point 11 LowSH: 180 (324) K (°F) A 83 82 -
threshold
A Valve opening at start-up (evaporator/valve capacity ratio) 50 0 100 % I 60 187 -
C Valve open in standby 0 0 1 - D 36 35 -
(0= disabled= valve closed; 1=enabled = valve open according
to parameter “Valve position in stand-by”)
C Valve position in stand-by 0 0 100 % I 92 219 -
0 = 25%
1…100% = % opening
C start-up delay after defrost 10 0 60 min I 40 167 CO
A Pre-position time 6 0 18000 s I 87 214
A Hot gas bypass temperature set point 10 -85(-121) 200 (392) °C (°F) A 84 83 -
A Hot gas bypass pressure set point 3 -20 (-290) 200 (2900) barg (psig) A 85 84 -
A EPR pressure set point 3.5 -20 (-290) 200 (2900) barg (psig) A 86 85 -
C PID: proportional gain 15 0 800 - A 87 86 -
C PID: integral time 150 0 1000 s I 61 188 -
C PID: derivative time 5 0 800 s A 88 87 -
A LowSH protection: threshold 5 -40 (-72) SH set point K (°F) A 89 88 -
C LowSH protection: integral time 15 0 800 s A 90 89 -
A LOP protection: threshold -50 -85(-121) MOP protec- °C (°F) A 91 90 -
tion: threshold
C LOP protection: integral time 0 0 800 s A 92 91 -
A MOP protection: threshold 50 LOP protec- 200 (392) °C (°F) A 93 92 -
tion: threshold
C MOP protection: integral time 20 0 800 s A 94 93 -
A Enable manual valve positioning 0 0 1 - D 32 31 -
A Manual valve position 0 0 9999 step I 53 180 -
C Discharge superheat setpoint (CANNOT BE SELECTED) 35 -40(-72) 180 (324) K (F°) A 100 99
C Discharge temperature setpoint (CANNOT BE SELECTED) 105 -85(-121) 200 (392) °C (°F) A 101 100
C Liquid level perc. set point 50 0 100 % A 119 118 -
SPECIAL
A HiTcond: threshold - SELECT WITH PROG. CONT. 80 -85(-121) 200 (392) °C (°F) A 58 57 CO
C HiTcond: integral time - SELECT WITH PROG. CONT. 20 0 800 s A 57 56 CO
A Modulating thermostat: set point - SELECT WITH PROG. CONT. 0 -85(-121) 200 (392) °C (°F) A 61 60 CO
A Modulating thermostat: differential - SELECT WITH PROG. CONT. 0. 1 0.1 (0.2) 100 (180) °C (°F) A 60 59 CO
C Mod. thermostat: SH set point offset - SELECT WITH PROG. CONT. 0 0 (0) 100 (180) K (°F) A 59 58 CO
C Coefficient ‘A’ for CO2 control 3.3 -100 800 - A 95 94 -
C Coefficient ‘B’ for CO2 control -22.7 -100 800 - A 96 95 -
C Impostazioni di rete 2 0 30 - I 74 201 CO
Parity Bit di stop Baud rate
A Power supply mode 0 0 1 - D 47 46 CO
0= 24 Vac; 1= 24 Vdc
C Enable mode single on twin (parameter disabled) 0 0 1 - D 58 57 CO
0= Twin; 1= Single
C Stop manual positioning if net error 0 0 1 - D 59 58 CO
C Programmable regulation configuration 0 0 32767 - I 101 228 -
C Programmable regulation input 0 0 32767 - I 102 229 -
C Programmable SH regulation options 0 0 32767 - I 103 230 -
C Programmable regulation set point 0 -800(-1233) 800(1233) - A 112 111 -
C CUSTOMIZED REFRIGERANT
Dew a high -288 -32768 32767 - I 107 234 CO
Dew a low -15818 -32768 32767 - I 108 235 CO
Dew b high -14829 -32768 32767 - I 109 236 CO
Dew b low 16804 -32768 32767 - I 110 237 CO
Dew c high -11664 -32768 32767 - I 111 238 CO
Dew c low 16416 -32768 32767 - I 112 239 CO
Dew d high -23322 -32768 32767 - I 113 240 CO

ENG
CAREL SVP
Modbus®
Type **
user *
Dew d low -16959 -32768 32767 - I 114 241 CO

Dew e high -16378 -32768 32767 - I 115 242 CO
Dew e low 15910 -32768 32767 - I 116 243 CO
Dew f high -2927 -32768 32767 - I 117 244 CO
Dew f low -17239 -32768 32767 - I 118 245 CO
Bubble a high -433 -32768 32767 - I 119 246 CO
Bubble a low -15815 -32768 32767 - I 120 247 CO
Bubble b high -15615 -32768 32767 - I 121 248 CO
Bubble b low 16805 -32768 32767 - I 122 249 CO
Bubble c high 30803 -32768 32767 - I 123 250 CO
Bubble c low 16416 -32768 32767 - I 124 251 CO
Bubble d high -21587 -32768 32767 - I 125 252 CO
Bubble d low -16995 -32768 32767 - I 126 253 CO
Bubble e high -24698 -32768 32767 - I 127 254 CO
Bubble e low 15900 -32768 32767 - I 128 255 CO
Bubble f high 10057 -32768 32767 - I 129 256 CO
Bubble f low -17253 -32768 32767 - I 130 257 CO
C Faulty closure alarm status 0 0 1 - D 49 48 -
0/1=no/yes
C Battery charge delay 0 0 250 min I 135 262 CO
ALARM CONFIGURATION
C Low superheat alarm delay (LowSH) 300 0 18000 s I 62 189 -
(0= alarm disabled)
C Low evaporation temperature alarm delay (LOP) 300 0 18000 s I 63 190 -
(0= alarm disabled)
C High evaporation temperature alarm delay (MOP) 600 0 18000 s I 64 191 -
(0= alarm disabled)
C High condensing temperature alarm delay (HiTcond) 600 0 18000 s I 44 171 CO
CANNOT BE SELECTED
C Low suction temperature alarm threshold -50 -85(-121) 200 (392) °C (°F) A 97 96 -
C Low suction temperature alarm delay 300 0 18000 s I 65 192 -
(0= alarm disabled)
VALVE
C EEV minimum steps 50 0 9999 step I 66 193 -
C EEV maximum steps 480 0 9999 step I 67 194 -
C EEV closing steps 500 0 9999 step I 68 195 -
C EEV rated speed 50 1 2000 step/s I 69 196 -
C EEV rated current 450 0 800 mA I 70 197 -
C EEV holding current 100 0 250 mA I 71 198 -
C EEV duty cycle 30 1 100 % I 72 199 -
C Synchronise position in opening 1 0 1 - D 37 36 -
C Synchronise position in closing 1 0 1 - D 38 37 -
Tab. 8.b
* User level: A= Service (installer), C= manufacturer.

** Type of variable: A= Analogue; D= Digital; I= Integer
CO= parameter settable from driver A or from driver B
8.3 Unit of measure

In the configuration parameters menu, with access by manufacturer password,
the user can choose the unit of measure for the driver:
• international system (°C, K, barg);
• imperial system (°F, psig).
Note: the units of measure K and R relate to degrees Kelvin or Rankine
adopted for measuring the superheat and the related parameters.
When changing the unit of measure, all the values of the parameters saved on Note: due to limits in the internal arithmetic of the driver, pressure
the driver and all the measurements read by the probes will be recalculated. values above 200 barg (2900 psig) and temperature values above 200 °C (392
This means that when changing the units of measure, control remains °F) cannot be converted
unaltered.
Example 1: The pressure read is 100 barg, this will be immediately converted
to the corresponding value of 1450 psig.
Example 2: The “superheat set point” parameter set to 10 K will be immediately

converted to the corresponding value of 18 °F.
Example 3: The “Temperature S4: maximum alarm value” parameter, set to

150 °C, will be immediately converted to the corresponding value of 302 °F.

ENG
8.4 Variablesaccessibleviaserialconnection–
driver A
Description Default Min Max Type CAREL SVP Modbus® R/W
Probe S1 reading 0 -20 (-290) 200 (2900) A 1 0 R
Probe S2 reading 0 -85(-121) 200 (392) A 2 1 R
Probe S3 reading 0 -20 (-290) 200 (2900) A 3 2 R
Probe S4 reading 0 -85(-121) 200 (392) A 4 3 R
Suction temperature 0 -85(-121) 200 (392) A 5 4 R
Evaporation temperature 0 -85(-121) 200 (392) A 6 5 R
Evaporation pressure 0 -20 (-290) 200 (2900) A 7 6 R
Hot gas bypass temperature 0 -85(-121) 200 (392) A 8 7 R
EPR pressure (back pressure) 0 -20 (-290) 200 (2900) A 9 8 R
Superheat 0 -40 (-72) 180 (324) A 10 9 R
Condensing pressure 0 -20 (-290) 200 (2900) A 11 10 R
Condensing temperature 0 -85(-121) 200 (392) A 12 11 R
Modulating thermostat temperature 0 -85(-121) 200 (392) A 13 12 R
Hot gas bypass pressure 0 -20 (-290) 200 (2900) A 14 13 R
CO2 gas cooler outlet pressure 0 -20 (-290) 200 (2900) A 15 14 R
CO2 gas cooler outlet temperature 0 -85(-121) 200 (392) A 16 15 R
Valve opening 0 0 100 A 17 16 R
CO2 gas cooler pressure set point 0 -20 (-290) 200 (2900) A 18 17 R
4 to 20 mA input value (S1) 4 4 20 A 19 18 R
0 to 10 V input value (S2) 0 0 10 A 20 19 R
Control set point 0 -60 (-870) 200 (2900) A 21 20 R
Controller firmware version 9.2** 0 800 A 25 24 R
MOP: suction temperature threshold (S2) 30 -85(-121) 200 (392) A 102 101 R/W
Discharge superheat 0 -40(-72) 180(324) A 104 103 R
Discharge temperature 0 -60(-76) 200(392) A 105 104 R
Thermal time constant NTC probe S4 50 1 800 A 106 105 R/W
MOP: High evaporation temperature threshold 50 LOP: threshold 200 (392) A 107 106 R/W
Condensation pressure for subcooling measure 0 -20(-290) 200(2900) A 108 107 R
Condensation bubble point 0 -60(-76) 200(392) A 109 108 R
Condensation liquid temperature 0 -60(-76) 200(392) A 110 109 R
Subcooling 0 -40(-72) 180(324) A 111 110 R
Liquid regulation evaporator/ condenser level percentage 0 0 100 A 116 115 R
Valve position 0 0 9999 I 4 131 R
Current unit cooling capacity 0 0 100 I 7 134 R/W
Adaptive control status - 0 10 I 75 202 R
Last tuning result 0 0 8 I 76 203 R
Extended measured probe S1 (*) 0 -2000 (-2901) 20000 (29007) I 83 210 R
Emergency closing speed valve 150 1 2000 I 86 213 R/W
Control mode (comp. BLDC) 1 1 3 I 89 216 R/W
Type of unit for serial comm. 0 0 32767 I 94 221 R
HW code for serial comm. 0 0 32767 I 95 222 R
Reading of probe S1*40 0 -32768 32767 I 97 224 R
Low suction temperature 0 0 1 D 1 0 R
LAN error 0 0 1 D 2 1 R
EEPROM damaged 0 0 1 D 3 2 R
ALARMS
Probe S1 0 0 1 D 4 3 R
Probe S2 0 0 1 D 5 4 R
Probe S3 0 0 1 D 6 5 R
Probe S4 0 0 1 D 7 6 R
EEV motor error 0 0 1 D 8 7 R
Status of relay 0 0 1 D 9 8 R
LOP (low evaporation temperature) 0 0 1 D 10 9 R
ALARMS
MOP (high evaporation temperature) 0 0 1 D 11 10 R

LowSH (low superheat) 0 0 1 D 12 11 R
HiTcond (high condensing temperature) 0 0 1 D 13 12 R
Status of digital input DI1 0 0 1 D 14 13 R
Status of digital input DI2 0 0 1 D 15 14 R
Guided initial procedure completed 0 0 1 D 22 21 R/W
Adaptive control ineffective 0 0 1 D 40 39 R
Mains power failure 0 0 1 D 45 44 R
Regulation backup from supervisor 0 0 1 D 46 45 R/W
Forced valve closing not completed 0 0 1 D 49 48 R/W
PROTECT.
ACTIV.

MOP high evaporation temperature) 0 0 1 D 52 51 R
HiTcond (high condensing temperature) 0 0 1 D 53 52 R
Direct relay control 0 0 1 D 57 56 R/W
Enable LAN mode on service serial port 0 0 1 D 60 59 R/W
(RESERVED)
Tab. 8.c
(*) The displayed variable is to be divided by 100, and allows us to appreciate
the hundredth of a bar (psig).
** or 9.3 for drivers for Carel valves only.

ENG
8.5 Variables accessible via serial
connection – driver B
Description Default Min Max Type CAREL SVP Modbus® R/W
Valve opening 0 0 100 A 66 65 R
Control set point 0 -60 (-870) 200 (2900) A 67 66 R
Superheat 0 -40 (-72) 180 (324) A 68 67 R
Suction temperature 0 -85 (-121) 200 (392) A 69 68 R
Evaporation temperature 0 -85 (-121) 200 (392) A 70 69 R
Evaporation pressure 0 -20 (-290) 200 (2900) A 71 70 R
EPR pressure (back pressure) 0 -20 (-290) 200 (2900) A 72 71 R
Hot gas bypass pressure 0 -20 (-290) 200 (2900) A 73 72 R
Hot gas bypass temperature 0 -85 (-121) 200 (392) A 74 73 R
CO2 gas cooler outlet temperature 0 -85 (-121) 200 (392) A 75 74 R
CO2 gas cooler outlet pressure 0 -20 (-290) 200 (2900) A 76 75 R
CO2 gas cooler pressure set point 0 -20 (-290) 200 (2900) A 77 76 R
4 to 20 mA input value (S3) 4 4 20 A 78 77 R
MOP: suction temperature threshold (S4) 30 -85 (-121) 200 (392) A 103 102 R/W
Liquid regulation evaporator/ condenser level percen- 0 0 100 A 117 116 R
tage
Valve position 0 0 9999 I 49 176 R
Current unit cooling capacity 0 0 100 I 50 177 R/W
EVD status 0 0 20 I 51 178 R
Protector status 0 0 5 I 52 179 R
Control mode 1 1 26 I 73 200 R/W
Adaptive control status 0 0 6 I 77 204 R
Last tuning result 0 0 8 I 78 205 R
Start control delay 6 0 18000 I 87 214 R/W
Emergency closing speed valve 150 1 2000 I 86 215 R/W
Valve opening position % in standby 0 0 100 I 92 219 R/W
ALARMS

MOP (high evaporation temperature) 0 0 1 D 28 27 R
Low suction temperature 0 0 1 D 29 28 R
EEV motor error 0 0 1 D 30 29 R
Status of relay 0 0 1 D 31 30 R
Adaptive control ineffective 0 0 1 D 42 41 R
ALARMS
Value backup digital input 0 0 1 D 48 47 R/W

LowSH protection status 0 0 1 D 54 53 R
LOP protection status 0 0 1 D 55 54 R
MOP protection status 0 0 1 D 56 55 R
Direct relay control 0 0 1 D 61 60 R/W
Tab. 8.d
(*) The displayed variable is to be divided by 100, and allows us to appreciate
the hundredth of a bar (psig).
Type of variable: A= analogue; D= digital; I= integer
SVP= variable address with CAREL protocol on 485 serial card.
Modbus®: variable address with Modbus® protocol on 485 serial card.

ENG
8.6 Variablesusedbasedonthetypeofcontrol
The table below shows the variables used by the drivers depending on the
“Main control” parameter. At the end of the variable list are the screens used
to check the probe and valve electrical connections for driver A and driver
B. These variables are visible on the display by accessing display mode (see
paragraph 3.4) and via serial connection with VPM, PlantVisorPRO,… (see
paragraphs 8.4, 8.5)
Procedure for showing the variables on the display:
• press the Help and Enter buttons together to select driver A or B;
• press the UP/DOWN button;
• press the DOWN button to move to the next variable/screen;
• press the Esc button to return to the standard display.
Main control
Variable displayed Superheat Transcritical Gas bypass Gas bypass EPR back Analogue I/O expander Control with
control CO2 temperature pressure pressure positioning for pCO level sensor
Valve opening (%) • • • • • • • •
Valve position (step) • • • • • • • •
Current unit cooling capacity • • • • • • •
Set point control • • •
Superheat •
Suction temperature •
Evaporation temperature •
Evaporation pressure •
Condensing temperature (*)
Condensing pressure (*)
Modulating thermostat temperature(*)
EPR pressure (back pressure) •
Hot gas bypass pressure •
Hot gas bypass temperature •
CO2 gas cooler outlet temperature •
CO2 gas cooler outlet pressure •
CO2 gas cooler pressure set point •
Probe S1 reading • • • • • • • •
Probe S4 reading • • • • • • •
4 to 20 mA input value • •
0 to 10 V input value • •
Status of digital input DI1(**) • • • • • • • •
Status of digital input DI2(**) • • • • • • • •
EVD firmware version • • • • • • • •
Display firmware version • • • • • • • •
Adaptive control status •
0= not enabled or stopper
1= monitoring superheat
2= monitoring suction temperature
3= wait superheat stabilisation
4= wait suction temperature stabilisation
5= applying step
6= positioning valve
7= sampling response to step
8= wait stabilisation in response to step
9= wait tuning improvement
10= stop, max number of attempts exceeded
Last tuning result •
0= no attempt performed
1= attempt interrupted
2= step application error
3= time constant/delay error
4= model error
5= tuning ended successfully on suction
temperature
6= tuning ended successfully on superheat
Liquid level percentage •
Tab. 8.e
(*) The value of the variable is not displayed
(**) Status of digital input: 0= open, 1= closed.
Note: the readings of probes S1, S2, S3, S4 is always displayed, regardless
of whether or not the probe is connected

ENG
9. ALARMS
9.1 Alarms
There are two types of alarms for each driver: Superheating A/B OFF 1/3 A/B
• system: valve motor, EEPROM, probe and communication; 4.9 K Valve motor
• control: low superheat, LOP, MOP, low suction temperature. Valve opening
ALARM error
44 %
The activation of the alarms depends on the setting of the threshold and Relais
activation delay parameters. Setting the delay to 0 disables the alarms. The
EEPROM alarm always shuts down the controller.
All the alarms are reset automatically, once the causes are no longer present.
The alarm relay contact will open if the relay is configured as alarm relay using Fig. 9.b
the corresponding parameter. The signalling of the alarm event on the driver
depends on whether the LED board or the display board is fitted, as shown • control alarm: next to the flashing ALARM message, the main page shows
in the table below. the type of protector activated.
Superheating A/B OFF

Note: the alarm LED only comes on for the system alarms, and not for 4.9 K
MOP
the control alarms. Valve opening
ALARM
44 %
Relais
Example: display system alarm on LED board for driver A and for driver B
EVD evolution EVD evolution Fig. 9.c
Note:
• to display the alarm queue, press the Help button and scroll using the
twin A B
twin A B UP/DOWN buttons. If at the end of the alarms for driver A/B the following
message is shown:
Alarms active on driver B/A
1. press Esc to return to the standard display;
Fig. 9.a 2. press the Help and Enter buttons together to move to the corresponding
driver;
Note:the alarm LED comes on to signal a mains power failure only if the 3. press Help to display the required alarm queue.
EVBAT*** module (accessory) has been connected, guaranteeing the power
required to close the valve. • the control alarms can be disabled by setting the corresponding delay to
zero.
The display shows both types of alarms, in two different modes:
system alarm: on the main page, the ALARM message is displayed, flashing.
Pressing the Help button displays the description of the alarm and, at the
top right, the total number of active alarms and the driver where the alarm
occurred (A / B). The same alarm may occur on both drivers (e.g. probe alarm)
Table of alarms
Type of alarm Cause of LED Display Relay Reset Effects on Checks/ solutions
the alarm control
Probe S1 Probe S1 faulty red alarm ALARM Depends on automatic Depends on Check the probe connections. Check
or exceeded set LED flashing configuration parameter “Probe the “Probe S1 alarm management”, &
alarm range parameter S1 alarm manage- “Pressure S1: MINIMUM & MAXIMUM
ment” alarm value” parameters
alarm range parameter S2 alarm manage- “Temperature S2: MINIMUM & MAXI-
ment” MUM alarm value” parameters
alarm range parameter S3 alarm manage- “Pressure S3: MINIMUM & MAXIMUM
ment” alarm value” parameters
alarm range parameter S4 alarm manage- “Temperature S4: MINIMUM & MAXI-
ment” MUM alarm value ”
LowSH (low LowSH protection - ALARM flashing Depends on automatic Protection action Check the “LowSH protection: th-
superheat) activated & LowSH configuration already active reshold & alarm delay” parameters
parameter
LOP (low evapora- LOP protection - ALARM flashing Depends on automatic Protection action Check the “Protection
tion temperature) activated & LOP configuration already active LOP: threshold & alarm delay” para-
parameter meters
MOP (high evapo- MOP protection - ALARM flashing Depends on automatic Protection action Check the “MOP protection: threshold
ration tempera- activated & MOP configuration already active & alarm delay” parameters
ture) parameter
Low suction Threshold and de- - ALARM Depends on automatic No effect Check the threshold and delay
temperature lay time exceeded flashing configuration parameters.
parameter

ENG
Type of alarm Cause of LED Display Relay Reset Effects on Checks/ solutions
the alarm control
EEPROM dama- EEPROM for red alarm ALARM flashing Depends on Replace Total shutdown Replace the controller/Contact
ged operating and/or LED configuration controller/ service
unit parameters parameter Contact
damaged service
EEV motor error Valve motor fault, red alarm ALARM flashing Depends on automatic Interruption Check the connections and the con-
not connected LED configuration dition of the motor. Switch controller
parameter off and on again
LAN error LAN network green ALARM flashing Depends on automatic Control based on Check the network address settings
communication NET LED configuration DI1/DI2
error flashing parameter
LAN network NET LED ALARM flashing Depends on automatic Control based on Check the connections and that the
connection error off configuration DI1/DI2 pCO is on and working
parameter
Display No communi- - ERROR message No change Replace No effect Check the controller/display and
connection error cation between controller/ connectors
controller and disply
display
Driver B Connection error, red alarm ALARM flashing Depends on automatic Driver B: forced Replace the controller
disconnected driver B LED B configuration closing
parameter Driver A: no effect
Alarms active on Generic error, red alarm ALARM flashing No change automatic No effect See list of alarms for driver A
driver A (1) driver A LED A
Alarms active on Generic error, red alarm ALARM flashing No change automatic No effect See list of alarms for driver B
driver B (2) driver B LED B
Battery Battery discharged red alarm Alarm flashing No change replace the No effect If the alarm persists for more than 3
discharged (**) or faulty or elec- LED battery hours (recharge time for EVBAT00500)
trical connection flashing replace the battery
interrupted
Adaptive control Tuning failed - ALARM flashing No change automatic No effect Change “Main control” parameter
ineffective setting
Wrong power DC driver power Green - Depends on the Change Total shutdown Check the “Power supply mode”
supply mode (*) supply with “Po- POWER configuration “Power sup- parameter and power supply
wer supply mode” LED parameter ply mode”
parameter set to flashin- parameter
AC power supply gRed setting
alarm
LED
Pressure Maximum pressu- Red alarm ALARM flashing Depends on the Automatic Depends on the Check the probe connections. Check
difference re difference th- LED configuration "Probe S1/S3 the parameters "Probe S1/S3 alarm
reshold exceeded parameter alarm manage- management" and "Pressure S1/
(S1-S3) ment" parameters S3: MINIMUM and MAXIMUM alarm
values"
Temperature Maximum pressu- Red alarm ALARM flashing Depends on the Automatic Depends on the Check the probe connections. Check
difference re difference th- LED configuration "Probe S2/S4 the parameters "Probe S2/S4 alarm
reshold exceeded parameter alarm manage- management" and "Temperature S2/
(S2-S4) ment" parameters S4: MINIMUM and MAXIMUM alarm
values"
Tab. 9.a
1) Message that appears at the end of the list of alarms for driver B.
(2) Message that appears at the end of the list of alarms for driver A.
(*) In the event of AC power supply with “Power supply mode” set to DC, no
alarm is displayed
(**) Alarm only visible if driver connected to EVDBAT00400 battery module
9.2 Alarm relay configuration

The relay contacts are open when the controller is not powered. In the event of a mains power failure, if the driver is connected to the Ultracap
During normal operation, the relay can be disabled (and thus will be always module, the forced emergency valve closing procedure starts and the red
open) or configured as: LED comes. At the end of the emergency closing procedure, the outcome is
• alarm relay : during normal operation, the relay contact is closed, and opens indicated by the value of the parameter “Failed closing alarm status”:
when any alarm is activated. It can be used to switch off the compressor 0 = Closing successful;
and the system in the event of alarms. 1 = Closing failed.
• solenoid valve relay : during normal operation, the relay contact is closed,
and is open only in standby. There is no change in the event of alarms. The driver will then switch off. If the closing procedure fails, when next
• solenoid valve relay + alarm : during normal operation, the relay contact restarting, if the parameter “Relay configuration” = 8 or 9 the display will show
is closed, and opens in standby and/or for LowSH, MOP, HiTcond and low the “Battery discharged” alarm and the relay will be activated based on the
suction temperature alarms. This is because following such alarms, the setting (open or closed).
user may want to protect the unit by stopping the flow of refrigerant or
switching off the compressor. The LOP alarm is excluded, as in the event Note: the “Battery discharged” alarm:
of low evaporation temperature closing the solenoid valve would worsen has no affect on the positioning of the valve, it is signal-only; is not activated if
the situation. the driver has a direct current power supply (Vdc).
• Direct control: the relay is actuated by a variable accessible by serial;
• Failed closing alarm relay (open with alarm);
• Reverse failed closing alarm relay (closed with alarm).

ENG
Parameter/description Def. Parameter/description Def. Min. Max. UOM
Relay configuration: Alarm CONFIGURATION
1= Disabled relay Probe S1 alarm management: Valve in fixed position - - -
2= Alarm relay (open when alarm active) 1= No action
3= Solenoid valve relay (open in standby) 2= Forced valve closing
4= Valve + alarm relay (open in standby and control alarms) 3= Valve in fixed position
5= Reversed alarm relay (closed in case of alarm) 4= Use backup probe S3 (*)
6= Valve status relay (open if valve is closed) (*)= CANNOT BE SELECTED
7= Direct control Probe S2 alarm management: Valve in fixed position - - -
8= Failed closing alarm relay(open with alarm) 1= No action
9= Reverse failed closing alarm relay (closed with alarm) 2= Forced valve closing
Tab. 9.b 3= Valve in fixed position
(*)= CANNOT BE SELECTED
9.3 Probe alarms Probe S3 alarm management: No action - - -
The probe alarms are part of the system alarms. When the value measured 1= No action
by one of the probes is outside of the field defined by the parameters 2= Forced valve closing
corresponding to the alarm limits, an alarm is activated. The limits can be set 3= Valve in fixed position
independently of the range of measurement. Consequently, the field outside Probe S4 alarm management: No action - - -
of which the alarm is signalled can be restricted, to ensure greater safety of 1= No action
the controlled unit. 2= Forced valve closing
Important: in applications that use programmable control it may be CONTROL
necessary to exclude the alarms generated by the probes: Valve opening at start-up (eva- 50 0 100 %
porator/valve capacity ratio)
Parameter/description Def. Min. Max. UOM Tab. 9.d
PROBES
Enable S1 1 0 1 -
Enable S2 1 0 1 -
Enable S3 1 0 1 - 9.4 Control alarms
Enable S4 1 0 1 - These are alarms that are only activate during control.
Note: Protector alarms

• the alarm limits can also be set outside of the range of measurement, to The alarms corresponding to the LowSH, LOP and MOP protectors are only
avoid unwanted probe alarms. In this case, the correct operation of the unit activated during control when the corresponding activation threshold is
or the correct signalling of alarms will not be guaranteed; exceeded, and only when the delay time defined by the corresponding
• by default, after having selected the type of probe used, the alarm limits parameter has elapsed. If a protector is not enabled (integral time= 0 s), no
will be automatically set to the limits corresponding to the range of alarm will be signalled. If before the expiry of the delay, the protector control
measurement of the probe. variable returns back inside the corresponding threshold, no alarm will be
signalled.
PROBESs Note: this is a likely event, as during the delay, the protection function
S1 alarm MIN pressure -1 -20 (-290) S1_AL_MAX barg (psig) will have an effect.
(S1_AL_MIN) If the delay relating to the control alarms is set to 0 s, the alarm is disabled. The
S1 alarm MAX pressure 9.3 S1_AL_MIN 200 (2900) barg (psig) protectors are still active, however. The alarms are reset automatically.
(S1_AL_MAX)
Alarm delay S1 0 0 240 s
S2 alarm MIN temp. -50 -60 S2_AL_MAX °C/°F
(S2_AL_MIN)
Low suction temperature alarm
S2 alarm MAX temp. 105 S2_AL_MIN 200 (392) °C (°F) The low suction temperature alarm is not linked to any protection function.
(S2_AL_MAX) It features a threshold and a delay, and is useful in the event of probe or
Alarm delay S2 0 0 240 s valve malfunctions to protect the compressor using the relay to control the
S3 alarm MIN pressure -1 -20 S3_AL_MAX barg (psig) solenoid valve or to simply signal a possible risk.
(S3_AL_MIN) In fact, the incorrect measurement of the evaporation pressure or incorrect
S3 alarm MAX pressure 9.3 S3_AL_MIN 200 (2900) barg (psig) configuration of the type of refrigerant may mean the superheat calculated
(S3_AL_MAX) is much higher than the actual value, causing an incorrect and excessive
Alarm delay S3 0 0 240 s opening of the valve.
S4 alarm MIN temp. -50 -60 S4_AL_MAX °C/°F A low suction temperature measurement may in this case indicate the
(S4_AL_MIN) probable flooding of the compressor, with corresponding alarm signal.
S4 alarm MAX temp. 105 S4_AL_MIN 200 (392) °C (°F) If the alarm delay is set to 0 s, the alarm is disabled. The alarm is reset
(S4_AL_MAX) automatically, with a fixed differential of 3°C above the activation threshold.
Alarm delay S4 0 0 240 s
Tab. 9.c Relay activation for control alarms
As mentioned in the paragraph on the configuration of the relay, in the event
The behaviour of the driver in response to probe alarms can be configured,
of LowSH, MOP and low suction temperature alarms, the driver relay will open
using the manufacturer parameters. The options are:
both when configured as an alarm relay and configured as a solenoid + alarm
• no action (control continues but the correct measurement of the variables relay.
is not guaranteed);
• forced closing of the valve (control stopped);
• valve forced to the initial position (control stopped).

ENG
In the event of LOP alarms, the driver relay will only open if configured as an
alarm relay.

CONTROL
LowSH protection: threshold 5 -40 (-72) SH set point K (°F)
LowSH protection: integral time 15 0 800 s
LOP protection: threshold -50 -60 (-76) MOP: °C (°F)
threshold
LOP protection: integral time 0 0 800 s
MOP protection: threshold 50 LOP: th- 200 (392) °C (°F)
reshold
ALARM CONFIGURATION
Low superheat alarm delay (LowSH) 300 0 18000 s
(0= alarm disabled)
Low evaporation temperature alarm 300 0 18000 s
delay (LOP)
(0= alarm disabled)
High evaporation temperature alarm 600 0 18000 s
delay (MOP)
(0= alarm disabled)
Low suction temperature alarm -50 -60 (-76) 200 (392) °C (°F)
threshold
Low suction temperature alarm 300 0 18000 s
delay
Tab. 9.e
9.5 EEV motor alarm

At the end of the commissioning procedure and whenever the controller is
powered up, the valve motor error recognition procedure is activated. This
precedes the forced closing procedure and lasts around 10 s. The valve is kept
stationary to allow any valve motor faults or missing or incorrect connections
to be detected. In any of these cases, the corresponding alarm is activated,
with automatic reset. The controller will go into wait status, as it can longer
control the valve. The procedure can be avoided by keeping the respective
digital input closed for each driver. In this case, after having powered up the
controller, forced closing of the valve is performed immediately.
Important: after having resolved the problem with the motor, it is

recommended to switch the controller off and on again to realign the position
of the valve. If this is not possible, the automatic procedure for synchronising
the position may help solve the problem, nonetheless correct control will not
be guaranteed until the next synchronisation.
9.6 LAN error alarm

Note: in the event of LAN error, a parameter can be set to disable
“Manual positioning”.
If the connection to the LAN network is offline for more than 6s due to an
electrical problem, the incorrect configuration of the network addresses or
the malfunction of the pCO controller, a LAN error alarm will be signalled.
The LAN error affects the operation of the controller as follows:
• case 1: unit in standby, digital input DI1/DI2 disconnected; driver A/B will
remain permanently in standby and control will not be able to start;
• case 2: unit in control, digital input DI1/DI2 disconnected: the driver will
stop control and will go permanently into standby;
• case 3: unit in standby, digital input DI1/DI2 connected: the driver will
remain in standby, however control will be able to start if the digital input
is closed. In this case, it will start with “current cooling capacity”= 100%;
• case 4: unit in control, digital input DI1/DI2 connected: driver A/B will
remain in control status, maintaining the value of the “current cooling
capacity”. If the digital input opens, the driver will go to standby and control
will be able to start again when the input closes. In this case, it will start with
“current cooling capacity”= 100%.

ENG
10. TROUBLESHOOTING
The following table lists a series of possible malfunctions that may occur
when starting and operating the driver and the electronic valve. These cover
the most common problems and are provided with the aim of offering an
initial response for resolving the problem.
PROBLEM CAUSE SOLUTION

The superheat value measu- The probe does not measure correct values Check that the pressure and the temperature measured are correct and that the probe
red is incorrect position is correct. Check that the minimum and maximum pressure parameters for the
pressure transducer set on the driver correspond to the range of the pressure probe
installed. Check the correct probe electrical connections.
The type of refrigerant set is incorrect Check and correct the type of refrigerant parameter.
Liquid returns to the com- The type of valve set is incorrect Check and correct the type of valve parameter.
pressor during control The valve is connected incorrectly (rotates Check the movement of the valve by placing it in manual control and closing or ope-
in reverse) and is open ning it completely. One complete opening must bring a decrease in the superheat and
vice-versa. If the movement is reversed, check the electrical connections.
The superheat set point is too low Increase the superheat set point. Initially set it to 12 °C and check that there is no
longer return of liquid. Then gradually reduce the set point, always making sure there is
no return of liquid.
Low superheat protection ineffective If the superheat remains low for too long with the valve that is slow to close, increase
the low superheat threshold and/or decrease the low superheat integral time. Initially
set the threshold 3 °C below the superheat set point, with an integral time of 3-4
seconds. Then gradually lower the low superheat threshold and increase the low
superheat integral time, checking that there is no return of liquid in any operating
conditions.
Stator broken or connected incorrectly Disconnect the stator from the valve and the cable and measure the resistance of the
windings using an ordinary tester.
The resistance of both should be around 36 ohms. Otherwise replace the stator. Finally,
check the electrical connections of the cable to the driver.
Valve stuck open Check if the superheating is always low (<2 °C) with the valve position permanently at
0 steps. If so, set the valve to manual control and close it completely. If the superheat is
always low, check the electrical connections and/or replace the valve.
The “valve opening at start-up” parameter Decrease the value of the “Valve opening at start-up” parameter on all the utilities,
is too high on many showcases in which making sure that there are no repercussions on the control temperature.
the control set point is often reached (for
multiplexed showcases only)
Liquid returns to the com- The pause in control after defrosting is too Increase the value of the “valve control delay after defrosting” parameter.
pressor only after defrosting short (for MasterCase, MasterCase 2 and
(for multiplexed showcases mpxPRO only)
only) The superheat temperature measured Check that the LowSH threshold is greater than the superheat value measured and that
by the driver after defrosting and before the corresponding protection is activated (integral time > 0sec). If necessary, decrease
reaching operating conditions is very low the value of the integral time.
for a few minutes
The superheat temperature measured by Set more reactive parameters to bring forward the closing of the valve: increase the
the driver does not reach low values, but proportional factor to 30, increase the integral time to 250 sec and increase the deriva-
there is still return of liquid to the compres- tive time to 10 sec.
sor rack
Many showcases defrosting at the same Stagger the start defrost times. If this is not possible, if the conditions in the previous
time two points are not present, increase the superheat set point and the LowSH thresholds
by at least 2 °C on the showcases involved.
The valve is significantly oversized Replace the valve with a smaller equivalent.
Liquid returns to the com- The “valve opening at start-up” parameter is Check the calculation in reference to the ratio between the rated cooling capacity of
pressor only when starting set too high the evaporator and the capacity of the valve; if necessary, lower the value.
the controller (after being
OFF)
The superheat value swings The condensing pressure swings Check the controller condenser settings, giving the parameters “blander” values (e.g.
around the set point with an increase the proportional band or increase the integral time). Note: the required
amplitude greater than 4°C stability involves a variation within +/- 0.5 bars. If this is not effective or the settings
cannot be changed, adopt electronic valve control parameters for perturbed systems
(see paragraph 8.3)
The superheat swings even with the valve Check for the causes of the swings (e.g. low refrigerant charge) and resolve where pos-
set in manual control (in the position cor- sible. If not possible, adopt electronic valve control parameters for perturbed systems
responding to the average of the working (see paragraph 8.3).
values)
The superheat does NOT swing with the As a first approach , decrease (by 30 to 50 %) the proportional factor. Subsequently
valve set in manual control (in the position try increasing the integral time by the same percentage. In any case, adopt parameter
corresponding to the average of the settings recommended for stable systems.
working values)
The superheat set point is too low Increase the superheat set point and check that the swings are reduced or disappear.
Initially set 13 °C, then gradually reduce the set point, making sure the system does not
start swinging again and that the unit temperature reaches the control set point.

ENG
PROBLEM CAUSE SOLUTION
In the start-up phase with MOP protection disabled or ineffective Activate the MOP protection by setting the threshold to the required saturated eva-
high evaporator tempe- poration temperature (high evaporation temperature limit for the compressors) and
ratures, the evaporation setting the MOP integral time to a value above 0 (recommended 4 seconds). To make
pressure is high the protection more reactive, decrease the MOP integral time.
Refrigerant charge excessive for the system Apply a “soft start” technique, activating the utilities one at a time or in small groups. If
or extreme transitory conditions at start-up this is not possible, decrease the values of the MOP thresholds on all the utilities.
(for showcases only).
In the start-up phase the The “Valve opening at start-up” parameter Check the calculation in reference to the ratio between the rated cooling capacity of
low pressure protection is is set too low the evaporator and the capacity of the valve; if necessary increase the value.
activated (only for units with The driver in configuration does not start Check the connections. Check that the pCO application connected to the driver (where
compressor on board) control and the valve remains closed featured) correctly manages the driver start signal. Check that the driver is NOT in
stand-alone mode.
The driver in stand-alone configuration Check the connection of the digital input. Check that when the control signal is sent
does not start control and the valve that the input is closed correctly. Check that the driver is in stand-alone mode.
remains closed
LOP protection disabled Set a LOP integral time greater than 0 sec.
LOP protection ineffective Make sure that the LOP protection threshold is at the required saturated evaporation
temperature (between the rated evaporation temperature of the unit and the corre-
sponding temperature at the calibration of the low pressure switch) and decrease the
value of the LOP integral time.
Solenoid blocked Check that the solenoid opens correctly, check the electrical connections and the
operation of the relay.
Insufficient refrigerant Check that there are no bubbles in the sight glass upstream of the expansion valve.
Check that the subcooling is suitable (greater than 5 °C); otherwise charge the circuit.
The valve is connected incorrectly (rotates Check the movement of the valve by placing it in manual control and closing or ope-
in reverse) and is open ning it completely. One complete opening must bring a decrease in the superheat and
vice-versa. If the movement is reversed, check the electrical connections.
check the electrical connections of the cable to the driver.
The “Valve opening at start-up” parameter Check the calculation in reference to the ratio between the rated cooling capacity of
is set too low the evaporator and the capacity of the valve; if necessary lower the value.
The unit switches off due LOP protection disabled Set a LOP integral time greater than 0 sec.
to low pressure during LOP protection ineffective Make sure that the LOP protection threshold is at the required saturated evaporation
control (only for units with temperature (between the rated evaporation temperature of the unit and the corre-
compressor on board) sponding temperature at the calibration of the low pressure switch) and decrease the
value of the LOP integral time.
Solenoid blocked Check that the solenoid opens correctly, check the electrical connections and the
operation of the control relay.
Insufficient refrigerant Check that there are no bubbles of air in the liquid indicator upstream of the expansion
valve. Check that the subcooling is suitable (greater than 5 °C); otherwise charge the
circuit.
The valve is significantly undersized Replace the valve with a larger equivalent.
check the electrical connections of the cable to the driver (see paragraph 5.1).
Valve stuck closed Use manual control after start-up to completely open the valve. If the superheat
remains high, check the electrical connections and/or replace the valve.
The showcase does not Solenoid blocked Check that the solenoid opens correctly, check the electrical connections and the
reach the set temperature, operation of the relay.
despite the value being Insufficient refrigerant Check that there are no bubbles of air in the liquid indicator upstream of the expansion
opened to the maximum valve. Check that the subcooling is suitable (greater than 5 °C); otherwise charge the
(for multiplexed showcases circuit.
only) The valve is significantly undersized Replace the valve with a larger equivalent.
check the electrical connections of the cable to the driver (see paragraph 5.1).
Valve stuck closed Use manual control after start-up to completely open the valve. If the superheat
remains high, check the electrical connections and/or replace the valve.
The showcase does not The driver in configuration does not start Check the connections. Check that the pCO application connected to the driver (where
reach the set temperature, control and the valve remains closed featured) correctly manages the driver start signal. Check that the driver is NOT in
and the position of the valve stand-alone mode.
is always 0 (for multiplexed The driver in stand-alone configuration Check the connection of the digital input. Check that when the control signal is sent
showcases only) does not start control and the valve that the input is closed correctly. Check that the driver is in stand-alone mode.
remains closed
Tab. 10.a

ENG
11. TECHNICAL SPECIFICATIONS
Power supply • 24 Vac (+10/-15%) to be protected by external 2 A type T fuse.
(Lmax= 5 m) • 24 Vdc (+10/-15%) 50/60 Hz to be protected by external 2 A type T fuse. Use a dedicated class 2 transformer (max 100 VA).
Power input 16.2 W ; 35 VA
Emergency power supply 22 Vdc+/-5%. (If the optional EVBAT00400 module is installed), Lmax=5 m
Insulation between relay output and reinforced; 6 mm in air, 8 mm on surface; 3750 V insulation
other outputs
Motor connection 4-wire shielded cable AWG 22, Lmax 10 m or AWG 14, Lmax= 50 m
Digital input connection Digital input to be activated from voltage-free contact or transistor to GND. Closing current 5 mA; Lmax< 30 m
Probes (Lmax=10 m; S1 ratiometric pressure probe (0 to 5 V):
with shielded cable • resolution 0.1 % fs; • measurement error: 2% fs maximum; 1% typical
less than 30 m) electronic pressure probe (4 to 20 mA):
• resolution 0.5 % fs; • measurement error: 8% fs maximum; 7% typical
remote electronic pressure probe (4 to 20mA). Maximum number of drivers connected=5
combined ratiometric pressure probe (0 to 5 V):
• resolution 0.1 % fs; • measurement error: 2 % fs maximum; 1 % typical
4 to 20 mA input (max 24 mA):
• resolution 0.5% fs; • measurement error: 8% fs maximum; 7% typical
0 to 5 V input:
• resolution 0.1 % FS; • measurement error: 2% FS maximum; 1% typical
S2 low temperature NTC:
• 10 kΩ at 25°C, -50T90 °C; • measurement error: 1°C in range -50T50 °C; 3°C in range +50T90 °C
high temperature NTC:
• 50 kΩ at 25°C, -30T150°C; • measurement error: 1.5 °C in range -20T115 °C, 4 °C in range outside of -20T115 °C
Combined NTC:
• 10 kΩ at 25 °C, -40T120 °C; • measurement error: 1 °C in range -40T50 °C; 3°C in range +50T90 °C
0 to 10 V input (max 12 V):
S3 ratiometric pressure probe (0 to 5 V):
electronic pressure probe (4 to 20 mA):
remote electronic pressure probe (4 to 20mA). Maximum number of drivers connected=5
4 to 20 mA input (max 24 mA):
• resolution 0.5% fs; • measurement error: 8% fs maximum; 7% typical
combined ratiometric pressure probe (0 to 5 V):
• resolution 0.1 % fs, • measurement error: 2 % fs maximum; 1 % typical
0 to 5 V input:
• resolution 0.1 % FS; • measurement error: 2% FS maximum; 1% typical
S4 low temperature NTC:
• 10 kΩ at 25°C, -50T105°C; • measurement error: 1°C in range -50T50 °C; 3°C in range 50T90°C
high temperature NTC:
• 50 kΩ at 25°C, -30T150°C; • measurement error: 1.5°C in range -20T115°C 4°C in range outside of -20T115°C
Combined NTC:
• 10 kΩ at 25°C, -40T120°C; • measurement error 1°C in range -40T50°C; 3°C in range +50T90°C
Relay output normally open contact; 5 A, 250 Vac resistive load; 2 A, 250 Vac inductive load (PF=0.4); Lmax=50 m;
UL: 250 Vac, 5 A resistive, 1A FLA, 6A LRA, pilot duty D300. 30000 cycles
VDE: 1(1)A PF=0.6
Power supply to active probes (VREF) +5 Vdc ±2% o 12 Vdc ±10% depending on type of probe set
RS485 serial connection Lmax=1000 m, shielded cable
tLAN connection Lmax=30 m, shielded cable
pLAN connection Lmax=500 m, shielded cable
Assembly DIN rail
Connectors plug-in, cable size 0.5 to 2.5 mm2 (12 to 20 AWG)
Dimensions LxHxW= 70x110x60
Operating conditions -25T60°C (don’t use EVDIS* under -20°C); <90% RH non-condensing
Storage conditions -35T60°C (don’t store EVDIS* under -30°C), humidity 90% RH non-condensing
Index of protector IP20
Environmental pollution 2 ( normal )
Resistance to heat and fire Category D
Immunity against voltage surges Category 1
Rated impulse voltage 2500V
Type of relay action 1C microswitching
Insulation class 2
Software class and structure A
Conformity Electrical safety: EN 60730-1, EN 61010-1, UL873, VDE 0631-1
Electromagnetic compatibility: EN 61000-6-1, EN 61000-6-2, EN 61000-6-3, EN 61000-6-4; EN61000-3-2, EN55014-1,
EN55014-2, EN61000-3-3.
Flammable refrigerants EVD Evolution complies with standard IEC 60335-2-40:2018 in case of using A2L refrigerants (e.g. R32); in detail, electrical compo-
nents that could be a source of ignition under normal operation are in compliance with Annex JJ, and the maximum surface tempe-
rature of all components does not exceed values given in Annex BB for A2L refrigerants reduced by 100K, during normal operation.
Tab. 11.a

ENG
12. APPENDIX 1: VPM (VISUAL PARAMETER MANAGER)
12.1 Installation
On the http://ksa.carel.com website, under the Parametric Controller Software
section, select Visual Parameter Manager.
A window opens, allowing 3 files to be downloaded:
1. VPM_CD.zip: for burning to a CD;
2. Upgrade setup;
3. Full setup: the complete program.
For first installations, select Full setup, for upgrades select Upgrade setup. The
program is installed automatically, by running setup.exe.
Note: if deciding to perform the complete installation (Full setup), first

uninstall any previous versions of VPM.
12.2 Programming (VPM) Fig. 12.c

When opening the program, the user needs to choose the device being
configured: EVD evolution. The Home page then opens, with the choice to 2. select the model from the range and create a new project or choose an
create a new project or open an existing project. Choose new project and existing project: select “Device model”.
enter the password, which when accessed the first time can be set by the
user.. A new project can be created, making the changes and then connecting
later on to transfer the configuration (OFFLINE mode). Enter at the Service or
Manufacturer level.
• select Device model and enter the corresponding code
Fig. 12.d
Fig. 12.a
• go to Configure device: the list of parameters will be displayed, allowing
Then the user can choose to: the changes relating to the application to be made.
1. directly access the list of parameters for the EVD evolution twin saved
to EEPROM: select “tLAN”;
This is done in real time (ONLINE mode), at the top right set the network
address 198 and choose the guided recognition procedure for the USB
communication port. Enter at the Service or Manufacturer level.
Fig. 12.e
At the end of configuration, to save the project choose the following

command, used to save the configuration as a file with the .hex extension.
File -> Save parameter list.
Fig. 12.b To transfer the parameters to the controller, choose the “Write” command.
During the write procedure, the 2 LEDs on the converter will flash.

ENG
Fig. 12.f
Note: the program On-line help can be accessed by pressing F1.
12.3 Copying the setup

On the Configure device page, once the new project has been created, to
transfer the list of configuration parameters to another controller:
• read the list of parameters from the source controller with the “Read”
command;
• remove the connector from the service serial port;
• connect the connector to the service port on the destination controller;
• write the list of parameters to the destination controller with the “Write”
command.
Important: the parameters can only be copied between controllers

with the same code. Different firmware versions may cause compatibility
problems.
12.4 Setting the default parameters

When the program opens:
• select the model from the range and load the associated list of parameters;
• go to “Configure device”: the list of parameters will be shown, with the
default settings.
• connect the connector to the service serial port on the destination
controller;
• select “Write”. During the write procedure, the LEDs on the converter will
flash.
The controller parameters will now have the default settings.
12.5 Updatingthecontrolleranddisplayfirmware
The controller and display firmware must be updated using the VPM program
on a computer and the USB/tLAN converter, which is connected to the device
being programmed (see paragraph 2.7 for the connection diagram). The
firmware can be downloaded from http://ksa.carel.com. See the VPM On-line
help.

ENG
13. APPENDIX 2: EVD EVOLUTION SINGLE
Setting the “Enable single mode on twin” parameter, EVD Evolution twin 4 white
effectively becomes an EVD Evolution with single driver and manages valve A 5 personal computer for configuration
only. In addition, it acquires the main control functions that require more than 6 USB/tLAN converter
two probes, such as superheat control with brushless DC compressor (BLDC), 7 adapter
superheat control with two temperature probes and all the auxiliary control 8 ratiometric pressure transducer - evaporation pressure
functions. The following explanations are available in manual +0300005EN; 9 NTC suction temperature
refer to this manual for a complete description. 10 digital input 1 configured to enable control
11 free contact (up to 230 Vac)
12 solenoid valve
13.1 Enable single mode on twin 13 alarm signal
Parameter to be set at the end of the commissioning procedure.
Parameter/Description Def Min Max UoM Note:

SPECIAL • connect the valve cable shield to the electrical panel earth;
Enable single mode on twin 0 0 1 - • the use of the driver for the superheat control requires the use of the
0 = Twin; 1 = Single evaporation pressure probe S1 and the suction temperature probe S2,
Tab. 13.a which will be fitted after the evaporator, and digital input 1/2 to enable
control. As an alternative to digital input 1/2, control can be enabled via
remote signal (tLAN, pLAN, RS485). For the positioning of the probes
13.2 User interface – LED card relating to other applications, see the chapter on “Control”;
The Open B/Close B LEDs flash.
• inputs S1, S2 are programmable and the connection to the terminals
depends on the setting of the parameters. See the chapters on
“Commissioning” and “Functions”;
VBAT
COM 1
NO 1
G0
G
1 3 2 4
Power Supply E X V connection Relay • pressure probe S1 in the diagram is ratiometric. See the general connection
diagram for the other electronic probes, 4 to 20 mA or combined;
• four probes are needed for superheat control with BLDC compressors, two
to measure the superheat and two to measure the discharge superheat
EVD evolution
and the discharge temperature.
13.4 Parameters enabled/disabled for control

twin The following parameters are made available in this mode. Probe S3 is no
longer settable as an external 4 to 20 mA signal.
Parameter/Description Def. / UoM
CONFIGURATION
V REF
GND
DI1
DI2
S1
S2
S3
S4
GND Tx/Rx
Main control Multiplexed
… showcase/
Fig. 13.a 19 =air-conditioner/chiller with BLDC compressor cold room
20 = superheat control with 2 temperature probes
13.3 Connection diagram - superheat control Auxiliary control Disabled
1 = Disabled
EVD Evolution Twin works as a single valve driver (on driver A). 2 = High condensing temperature protection on S3
3 = Modulating thermostat on S4
CAREL EXV 4 = Backup probes on S3 and S4
VALVE A
5, 6, 7= reserved
8 = Subcooling measurement
9 = Reverse high condensing temperature protection on S3
Probe S3 Ratiometric:
4 14 15 … -1 to 9.3 barg
S
1 A 20 = external signal (4 to 20 mA) (CANNOT BE SELECTED)
2
3 Variable 1/2 on the display Superheat
shield
…
13
11 = Modulating thermostat temperature
S1 probe alarm management Valve in fixed
COMA
NOA
VBAT
G0
1 3 2 4
G
… position
Use backup probe S3
COMB
NOB
1 3 2 4
S2 probe alarm management Valve in fixed
EVD NET
evolution
… position
230 Vac 24 Vac OPEN A OPEN B
Use backup probe S4
2 AT CLOSE A CLOSE B Auxiliary refrigerant 0
35 VA
twin
G0
G
TRADRFE240 A B
0 = same as main control;
1= R22 2= R134a 3= R404A
5
4= R407C 5= R410A 6= R507A
7= R290 8= R600 9= R600a
VREF
GND
DI1
DI2
S1
S4
S2
S3
GND Tx/Rx
10= R717 11= R744 12= R728
EVDCNV00E0
13= R1270 14= R417A 15= R422D
EVD4 service USB adapter 16= R413A 17= R422A 18= R423A
4
19= R407A 20= R427A 21= R245FA

EVD4
PC
EEV driver
11 22= R407F 23=R32 24=HTR01

6
25= HTR02 26=R23 27 = R1234yf
7 8 9 10 12 28 = R1234ze 29 = R455A 30 = R170
Fig. 13.b 31 = R442A 32 = R447A 33 = R448A
34 = R449A 35 = R450A 36 = R452A
37 = R508B 38 = R452B 39 = R513A
Key: 40 = R454B 41 = R458A
1 green
2 yellow
3 brown
ENG
Parameter/Description Def. / UoM 13.7 S3 e S4 inputs
CONFIGURATION The auxiliary probe S3 is associated with the high condensing temperature
PROBES protection or can be used as a backup probe for the main probe S1. If the
S3: calibration gain 4 to 20 mA (CANNOT BE SELECTED) 1
probe being used is not included in the list, select any 0 to 5 V ratiometric or
CONTROL electronic 4 to 20 mA probe and then manually modify the minimum and
Discharge superheat set point 35 maximum measurement in the manufacturer parameters corresponding to
Discharge temperature set point 105 the probes.
SPECIAL
HiTcond: thresh.old 80
HiTcond: integral time 20 Important: probes S3 and S4 are shown as NOT USED if the “auxiliary
Modulating thermostat: set point 0 control” parameter is set as “disabled”. If “auxiliary control” has any other setting,
Modulating thermostat: differential 0.1 the manufacturer setting for the probe used will be shown, which can be
Modulating thermostat: superheat set point offset 0 selected according to the type.
ALARM CONFIGURATION
High condensing temperature alarm delay (HiTcond) 600 Priority of digital inputs
Tab. 13.b In certain cases the setting of digital inputs 1 and 2 may be the same or
alternatively may be incompatible (e.g.: digital input 1 = regulation backup,
digital input 2 = regulation security). The problem thus arises to determine
which function the driver needs to perform.
13.5 Programming with the display
Consequently, each type of function is assigned a priority, primary (PRIM) or
Before setting the parameters, switch the display to driver A.
secondary (SEC), as shown in the table:
Important: ignore the parameters for driver B. DI1/DI2 configuration Type of function
1=Disabled SEC
2=Valve regulation optimization after defrost SEC
CONFIGURAZIONE A 3=Discharged battery alarm management SEC
SONDA S1
Raziom., -1/9.3 barg 4=Valve forced open (at 100%) SEC
REGOLAZIONE PRINCIPALE 5=Regulation start/stop PRIM
banco frigo/cella canalizzati
6=Regulation backup PRIM
7=Regulation security PRIM
Tab. 13.d
Fig. 13.c There are four possible cases of digital input configurations with primary or
secondary functions.
Function set Function performed by digital input

DI1 DI2 PRIM SEC
13.6 Auxiliary refrigerant PRIM PRIM DI1 -
In the event of cascade systems comprising a main circuit and a secondary PRIM SEC DI1 DI2
circuit, the auxiliary refrigerant is the refrigerant in the secondary circuit. See SEC PRIM DI2 DI1
the paragraphs “Auxiliary control” and “Reverse high condensing temperature SEC SEC Regulation backup DI1
protection (HiTcond) on S3”. The default value 0 sets the same refrigerant as (supervisor variable)
in the main circuit. Tab. 13.e
Parameter/description Def. Min Max U.M. Note that:

CONFIGURATION • if digital inputs 1 and 2 are set to perform a PRIM function, only the function
Refrigerant: R404A - - - set for input 1 is performed;
-1= user defined; 0= same as main control; • if the digital inputs 1 and 2 are set to perform a SEC function, only the SEC
1= R22 2= R134a 3= R404A function set for input 1 is performed; the driver will be set to “Regulation
4= R407C 5= R410A 6= R507A backup” with the value of the digital input determined by the “Regulation
7= R290 8= R600 9= R600a
10= R717 11= R744 12= R728 backup from supervisor” variable.
13= R1270 14= R417A 15= R422D
16= R413A 17= R422A 18= R423A
19= R407A 20= R427A 21= R245FA 13.8 Main control – additional functions
22= R407F 23=R32 24=HTR01 The following additional functions are available using probes S3 and S4.
25= HTR02 26=R23 27 = R1234yf
28 = R1234ze 29 = R455A 30 = R170
31 = R442A 32 = R447A 33 = R448A BLDC Control with compressor
34 = R449A 35 = R450A 36 = R452A
37 = R508B 38 = R452B 39 = R513A
40 = R454B 41 = R458A Important: this type of control is incompatible with adaptive control
and autotuning.
Tab. 13.c
To be able to use this control function, only available for CAREL valve drivers,
the driver must be connected to a CAREL pCO programmable controller
Note:
running an application able to manage a unit with BLDC scroll compressor.
• for cascade CO2 systems, at the end of the commissioning procedure, also
In addition, the compressor must be controlled by the CAREL Power+
set the auxiliary refrigerant. See the paragraph on reverse HiTcond;
“speed drive” (with inverter), specially designed to manage the speed profile
• if the refrigerant is not among those available for the “Refrigerant”
required by the compressor operating specifications. Two probes are needed
parameter”:
for superheat control (PA, TA) plus two probes located downstream of the
1. set any refrigerant (e.g. R404);
compressor (PB, TB) for discharge superheat and discharge temperature (TB)
2. select the model of valve, the pressure probe S1, the type of main
control.
control and end the commissioning procedure;
3. enter programming mode and set the type of refrigerant: custom, and Parameter/Description Def.
the parameters “Dew a…f high/low” and “Bubble a…f high/low” that CONFIGURATION
define the refrigerant; Main control multiplexed showcase/cold
4. start control, for example by closing the digital input contact to enable … room
operation. AC/chiller with BLDC compressor
Tab. 13.f

ENG
The functional diagram is shown below. This type of control must be used
C with care, due to the lower precision of the temperature probe compared to
TB
the probe that measures the saturated evaporation pressure.
L
PB
POWER + CONFIGURATION
speed drive
Main control multiplexed showcase/cold
EVD … room
evolution
0V + - superheat regulation with 2 temperature
F
1 2 3
probes
CP
S1
S2
S3
S4
GND Tx/Rx
shield
C
V M
Modbus®
E RS485
EV
PA TA
L
EVD
GND
pCO
evolution
F
shield
CP
S2
S4
Fig. 13.d
Legenda:
S
CP Compressor V Solenoid valve
C Condenser S Liquid gauge
L Liquid receiver EV Electronic valve V M
TA,TB Temperature probes PA, PB Pressure probes
EV
For information on the wiring see paragraph “General connection diagram”.
To optimise performance of the refrigerant circuit, compressor operation T E
must always be inside a specific area, called the envelope, defined by the
compressor manufacturer. T
Inviluppo ⁄ Envelope
Fig. 13.f
Key:
CP Compressor V Solenoid valve
C Condenser S Liquid gauge
Temperatura di condensazione (C°)
L Liquid receiver EV Electronic valve

Condensing temperature (C°)
T Temperature probe
Parameter/Description Def. Min. Max. U.M.

ADVANCED
Superheat setpoint 11 LowSH: soglia 180 (324) K (°F)
Tab. 13.h
Temperatura di evaporazione (C°) 13.9 Auxiliary control

Evaporation temperature (C°)
Auxiliary control can be activated at the same time as main control, and uses
the probes connected to inputs S3 and/or S4.
Fig. 13.e
The pCO controller defines the current set point according to the point of Parameter/description Def.
operation within the envelope: CONFIGURATION
• superheat setpoint; Auxiliary control: Disabled
• discharge superheat setpoint; 1=Disabled;
• discharge temperature setpoint. 2=High condensing temperature protection on S3 probe;
3=Modulating thermostat on S4 probe;
4=Backup probes on S3 & S4;
5, 6, 7 = Reserved;
ADVANCED
8 = Subcooling measurement;
Superheat setpoint 11 LowSH: 180(324) K(°F)
9 = Reverse high condensing temperature protection on S3
threshold
Discharge superheat setpoint 35 -40(-72) 180(324) K(°F)
Tab. 13.i
Discharge temperature setpoint 105 -60(-76) 200(392) °C(°F)
Tab. 13.g For the high condensing temperature protection (only available with
superheat control), an additional pressure probe is connected to S3 that
Note:
measures the condensing pressure. For the modulating thermostat function
this control function is only available CAREL valve drivers; no set point needs
(only available with superheat control), an additional temperature probe
to be configured by the user.
is connected to S4 that measures the temperature on used to perform
Superheat regulation with 2 temperature probes temperature control (see the corresponding paragraph).
ENG
The last option (available if “main control” = 1 to 18) requires the installation of change.
both probes S3 & S4, the first pressure and the second temperature.
T_EVAP
Note: if only one backup probe is fitted, under the manufacture MOP_TH
parameters, the probe thresholds and alarm management can be set MOP_TH - 1
separately.
ON t
MOP
HITCond protection (high condensing temperature) OFF
The functional diagram is shown below.
ON t
C PID
OFF
L ON
t
P ALARM
EVD OFF
evolution
F
CP D t
S1
S2
S3
S Fig. 13.h
Key:
M T_COND Condensing temperature T_COND_TH HiTcond: threshold
E HiTcond High Tcond protection status HiTcond ALARM Alarm
PID PID superheat control t Time
V EEV
P T D Alarm timeout
Note:
Fig. 13.g • the High Tcond threshold must be greater than the rated condensing
temperature of the unit and lower then the calibration of the high pressure
Key: switch;
CP Compressor EEV Electronic expansion valve
• the closing of the valve will be limited if this causes an excessive decrease
C Condenser V Solenoid valve in the evaporation temperature.
L Liquid receiver E Evaporator
F Dewatering filter P Pressure probe (transducer)
S Liquid indicator T Temperature probe Modulating thermostat
This function is used, by connecting a temperature probe to input S4, to
For the wiring, see paragraph “General connection diagram”. modulate the opening of the electronic valve so as to limit the lowering of
the temperature read and consequently reach the control set point. This is
As already mentioned, the HITCond protection can only be enabled if the useful in applications such as the multiplexed cabinets to avoid the typical
controller measures the condensing pressure/temperature, and responds swings in air temperature due to the ON/OFF control (thermostatic) of the
moderately by closing the valve in the event where the condensing solenoid valve. A temperature probe must be connected to input S4, located
temperature reaches excessive values, to prevent the compressor from in a similar position to the one used for the traditional temperature control
shutting down due to high pressure. The condensing pressure probe must be of the cabinet. In practice, the close the controlled temperature gets to the
connected to input S3. set point, the more the control function decreases the cooling capacity of
the evaporator by closing the expansion valve. By correctly setting the related
Parameter/description Def. Min. Max. UOM parameters (see below), a very stable cabinet temperature can be achieved
ADVANCED around the set point, without ever closing the solenoid valve. The function is
High Tcond threshold 80 -60 (-76) 200 (392) °C (°F) defined by three parameters: set point, differential and offset.
High Tcond integration time 20 0 800 s
ALARM CONFIGURATION Parameter/description Def. Min. Max. UOM
High condensing temperature alarm 600 0 18000 s ADVANCED
timeout (High Tcond) Modul. thermost setpoint 0 -60 (-76) 200 °C (°F)
(0= alarm DISABLED) (392)
Tab. 13.j Modul. thermost differential 0.1 0.1 (0.2) 100 °C (°F)
(180)
The integration time is set automatically based on the type of main control. Modul. thermost SHset offset (0= fun- 0 0 (0) 100 K (°R)
ction disabled) (180)
Note:
Tab. 13.k
• the protector is very useful in units with compressors on board if the air-
cooled condenser is undersized or dirty/malfunctioning in the more critical The first two should have values similar to those set on the controller for the
operating conditions (high outside temperature); cabinet or utility whose temperature is being modulated.
• the protector has no purpose in multiplexed systems (showcases), where The offset, on the other hand, defines the intensity in closing the valve as
the condensing pressure is maintained constant and the status of the the temperature decreases: the greater the offset, the more the valve will be
individual electronic valves does not affect the pressure value. modulated. The function is only active in a temperature band between the set
point and the set point plus the differential.
To reduce the condensing temperature, the output of the refrigeration
unit needs to be decreased. This can be done by controlled closing of the
electronic valve, implying superheat is no longer controlled, and an increase in Important: the “Modulating thermostat” function should not be used
the superheat temperature. The protector will thus have a moderate reaction on stand-alone refrigeration units, but only in centralised systems. In fact, in
that tends to limit the increase in the condensing temperature, keeping the former case closing the valve would cause a lowering of the pressure and
it below the activation threshold while trying to stop the superheat from consequently shut down the compressor.
increasing as much as possible. Normal operating conditions will not resume
based on the activation of the protector, but rather on the reduction in the
outside temperature. The system will therefore remain in the best operating
conditions (a little below the threshold) until the environmental conditions
ENG
Examples of operation: Backup probes on S3 & S4
S4 Important: this type of control is compatible with the “main control”
set point + diff parameter setting between 1 and 18.
set point In this case, pressure probe S3 and temperature probe S4 will be used to
1. offset too low (or function
t replace probes S1 and S2 respectively in the event of faults on one or both, so
disabled) ON as to guarantee a high level of reliability of the controlled unit.
SV
OFF
t C
S4 L
set point + diff
EVD
set point
evolution
t F
2. offset too high CP
S1
S2
S3
S4
ON
SV S
OFF
t
M
S4 E
set point + diff V EEV
P T P T
set point
t
3. offset correct
ON Fig. 13.k
SV Key:
OFF
t CP Compressor EEV Electronic expansion valve
C Condenser V Solenoid valve
L Liquid receiver E Evaporator
Fig. 13.i
F Dewatering filter P Pressure probe (transducer)
S Liquid indicator T Temperature probe
Key:
diff= differential For the wiring, see paragraph “General connection diagram”.
SV= solenoid valve (showcase temperature control)
S4= temperature
Subcooling measurement
C This function measures subcooling using a pressure probe and a temperature
probe connected to inputs S3 and S4 respectively. The reading can be sent to
a controller connected in the serial network (e.g. pCO).
C
L
EVD TB PB
evolution
F L
CP
S1
S2
S4
S
CP
F EVD
evolution
M
S S1 S2 S3 S4
T E
V EEV
P T
V M
Fig. 13.j EEV E

PA TA
Key:
CP Compressor EEV Electronic expansion valve
C Condenser V Solenoid valve Fig. 13.l
l Liquid receiver E Evaporator
F Dewatering filter P Pressure probe (transducer) Key:
S Liquid indicator T Temperature probe CP Compressor EEV Electronic expansion valve
C Condenser V Solenoid valve
For the wiring, see paragraph “General connection diagram”. L Liquid receiver E Evaporator
F Filter-drier PA, PB Pressure probes
S Liquid gauge TA, TB Temperature probes
For the wiring, see paragraph “General connection diagram”

ENG
The subcooling measurement uses the difference between the condensing
temperature taken from the relative pressure reading and the temperature of Nota: for this type of application, the auxiliary refrigerant must be set
the liquid refrigerant exiting the condenser. This measurement indicates the as CO2 (R744).ù
refrigerant charge in the circuit.
A value near 0 K indicates possible insufficient refrigerant, which may cause C
a decline in circuit cooling efficiency, a reduction in mass flow through the
expansion valve and swings in superheat control. In addition, it may indicate
a refrigerant leak in circuits where the nominal subcooling value is known. L1
A subcooling value that is too high, for example above 20 K, when not required A CP1
by the application may indicate excessive refrigerant charge in the circuit, and F1
can cause unusually high condensing pressure values with a consequent
decline in circuit cooling efficiency and possible compressor shutdown due
EVD
to the high pressure switch tripping. S1 evolution
S1 S2 S3 S4
M
V
Reverse high condensing temperature protection
(HiTcond) on S3 EEV
The aim of reverse HiTcond protection is to limit the condensing pressure in CHE
the refrigerant circuit by opening the valve rather than closing it. This function
is recommended, rather than the HiTcond protection function described P1 T1
previously, in refrigerant circuits without a liquid receiver and where the
condenser is smaller than the evaporator (e.g. air-to-water heat pumps). In P2
this case, in fact, closing the valve would obstruct the flow of refrigerant to the
L2
condenser that, lacking sufficient volume for the refrigerant to accumulate,
would cause an increase in condensing pressure. This function is especially B CP2
useful for condensers in CO2 cascade systems. See the chapter on Protectors. F2
C
S2
T V2 E
P V1 M
F
EVD CP Fig. 13.n
evolution
S
S3
S1
S2
Key:
CP1/2 Compressor 1/2 EEV Electronic expansion valve
CHE Cascade heat exchanger C Condenser
L1/2 Liquid receiver 1/2 V Solenoid valve
V M F1/2 Filter-drier 1/2 E Evaporator
S1/2 Liquid gauge 1/2 P1/2 Pressure probe (transducer)
T1 Temperature probe V2 Thermostatic expansion valve
EEV E
P T
For the wiring, see paragraph 2.11 “General connection diagram”
The driver controls refrigerant superheat in the primary circuit (A), and at the
Fig. 13.m same time measures the refrigerant condensing pressure in the secondary
Key:
circuit (B). When the condensing temperature exceeds the HiTCond protection
CP Compressor EEV Electronic expansion valve threshold, normal superheat control is overridden by forced opening of
C Condenser V Solenoid valve the valve, at a rate that is inversely proportional to the HiTCond protection
F Filter-drier E Evaporator integral time. Opening the EEV lowers the superheat in the primary circuit,
S Liquid gauge P Pressure probe (transducer) which increases the heat exchange coefficient and consequently reduces the
T Temperature probe condensing pressure in the secondary circuit.
For the wiring, see paragraph “General connection diagram”
The reverse HiTcond threshold for CO2 cascade applications should be set in
relation to the expected evaporation temperature in the primary circuit. The
Important: opening the valve will probably also cause activation of threshold must be set to a value that is at least 3-5°C higher than the minimum
the low superheat protection LowSH, which tends to limit the opening of evaporation temperature in the primary circuit. Lower values make achieving
the valve. The ratio between the integral times of these two concurrent yet the set pressure limit incompatible with heat exchange efficiency. In addition,
opposing protectors determines how effective one is compared to the other. swings in operation may occur due the attempt to limit low superheat in the
primary circuit and the pressure in the secondary circuit at the same time.
Reverse HiTcond (for CO2 cascade systems)

Reverse high condensing temperature protection (HiTcond) on S3 is especially
useful for condensers in CO2 cascade systems, where condensation in the low 13.10 Variablesusedbasedonthetypeofcontrol
temperature circuit (also called “secondary”, B) takes place when evaporating Vedere il manuale cod. +0300005IT.
the refrigerant in the medium temperature circuit (“primary”, A).
Parameter / Description Def.

SPECIAL
Refrigerant Alls refrigerants, not R744
Main regulation Subcooling regulation 1...10
Auxiliary refrigerant R744
Tab. 13.l

ENG
Note:

“EVD Evolution TWIN” +0300006EN - rel. 2.10 - 24.01.2024
Agenzia / Agency:
CAREL INDUSTRIES HQs

Via dell’Industria, 11 - 35020 Brugine - Padova (Italy)
Tel. (+39) 049.9716611 - Fax (+39) 049.9716600
e-mail: carel@carel.com - www.carel.com

+0300006EN

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EVD evolution twin

Driver for 2 electronic expansion valves

CAREL INDUSTRIES bases the development of its products on decades

In addition to observing any further warnings described in this manual, the

3 “EVD Evolution TWIN” +0300006EN - rel. 2.10 - 24.01.2024

1. INTRODUCTION 7 8. TABLE OF PARAMETERS 35

3. USER INTERFACE 14 11. TECHNICAL SPECIFICATIONS 55

5 “EVD Evolution TWIN” +0300006EN - rel. 2.10 - 24.01.2024

7 “EVD Evolution TWIN” +0300006EN - rel. 2.10 - 24.01.2024

Series of accessories for EVD evolution twin

Fig. 0.a Float level sensor (P/N LSR0013000)

Power Supply E X V connection Relay

70 49 EVD evolution NET S

2.2 Description of the terminals 5

GND Tx/Rx 8 NTC – suction temperature driver A

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For installation proceed as follows, with reference to the wiring diagrams: NO !

use for flush mount

2.5 Valve operation in parallel and

24 Vac 24 Vac 24 Vac complementary mode

paragraph 4.2), in parallel mode, with identical behaviour, or in complementary

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CAREL EXV CAREL EXV EVD evo

VALVE A_2 VALVE B_2 OPEN

Important: in the case of installations with four valves, the EVD0000UC0

E2V E3V E4V E5V E6V E7V PC

TWIN 1 TWIN 2 TWIN 3

GND Tx/Rx GND Tx/Rx GND Tx/Rx

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EVD evolution JEAD69

2.9 Connecting the USB/RS485 converter

Analog - Digital Input Network

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230 Vac 24 Vac NET S

EVD0000T0*: tLAN version

GND Tx/Rx GND Tx/Rx EVD0000T3*: tLAN version

GND Tx/Rx GND Tx/Rx

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Power Supply E X V connection Relay the relay output.

1 variable 1 on the display (driver A/B)

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CONFIGURATION B Fig. 3.f

control. The network address for EVD evolution twin is single.

in the last position;

• pCO PROGRAMMABLE CONTROLLER: the first operation to be

GND Tx/Rx GND Tx/Rx

EVD EVD EVD EVD

guidelines described in the following paragraph for setting the address.

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4. press Enter to confirm the value 5. press UP/DOWN to move to the

Parameter/description Def. Min. Max. UOM

green 1= R22 2= R134a 3= R404A 4= R407C 5= R410A

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“EVD Evolution TWIN” +0300006EN - rel. 2.10 - 24.01.2024 18

4.4 Checks after commissioning

4.5 Other functions

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5.2 Superheat control F2 B