EWRC 300/500/5000 NT

Controllers for static and ventilated cold rooms

English

QUICK START
 NB
The electrical panel (equipment) must be installed and repaired only by qualified staff. Eliwell accepts no
responsibility for any consequences resulting from the use of this material.

A qualified person is someone who has specific skills and knowledge regarding the structure and the
operation of electrical equipment and who has received safety training on how to avoid the inherent
dangers.

Product related information

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION OR ARC FLASH
• Turn off all devices, including connected devices, before removing any covers or doors, or
installing/uninstalling accessories, hardware, cables, or wires.
• Always use a properly rated voltage sensing device to confirm the power is off where and when
indicated.
• Replace and secure all covers, accessories, hardware, cables, and wires and confirm that a
proper ground connection exists before applying power to the unit.
• Use only the specified voltage when operating this equipment and any associated products.
• Comply with all the standards regarding accident protection and the local applicable safety
directives.
Failure to follow these instructions will result in death or serious injury.
English

DANGER
POTENTIAL FOR EXPLOSION
• Install this device only in areas known to be free from dangerous surroundings.
• Install and use this equipment in non-hazardous locations only.
Failure to follow these instructions will result in death or serious injury.

WARNING
UNINTENDED EQUIPMENT OPERATION
• The signal cables (probes, digital inputs, communication, and relative power supplies) must be
laid separately from the power cables.
• Every implementation of this device must be tested individually and completely in order to check
its proper operation before putting it in service.
Failure to follow these instructions can result in death, serious injury, or equipment
damage.

EWRC 300/500/5000 NT 2 - EN
INTRODUCTION
The Coldface EWRC 300/500/5000 NT series controls the temperature of a static or ventilated cold
room. The instrument controls positive and negative cold rooms and is capable of managing a double
evaporator and condenser probes.
Coldface has 3 or 5 configurable relays, depending on the model, and 2(3) configurable digital inputs
for door switches or other devices. Models are available with clock with yearly calendar and HACCP
event logging.
It is possible to connect the instrument to TelevisSystem / Modbus via the optional RS485 plug-in
module.
The container lets you install one or more electromechanical devices, depending on the model.
This summary document contains basic information about the standard
EWRC 300/500/5000 NT models. For further information and different configurations, refer to
the complete user manual cod. 9MA*0258 which is available to download free of charge from
www.eliwell.com.

NAVIGATION DIAGRAM
Turns light
Display alarms
if active
on/off display probe
value
display probe
value SetPoint & Probes
Turns instrument Pb1 Pb2
Display HACCP alarms on/off -20.6 -20.6
if function active

1 sec rtc set time

18.55 and date

English
Manual 3 sec
defrost
1 sec SET modify SetPoint
confirm with
-18.9 value

1 sec
Parameters
USr diF
modify value confirm with
Functions Menu 3 sec 2.0

Info
LOC keypad lock System
rEd disable HACCP
rPA Pressure switch inS CPr
see manual
rSE active Set reduced ---
rHC reset HACCP alarms

function ON / OFF

INSTALLATION PROCEDURE
NOTE: procedural steps that are common to all models. Only the EWRC 5000 model is used as an
example.

1) Remove the cover and drill the holes for the cable clamps (at least one for power cables and one
for signalling cables) on the bottom of the panel.
NOTE: for the 300/500 models, use the drilling template provided.

3 - EN EWRC 300/500/5000 NT
 2) Drill the wall fixing holes on the back of the 343 / 13,5
panel, in the areas marked on the back. 171,5/ 6,75

mm / in

321,5 / 12,66
360 / 14,17

3) Fix the back of the panel to the wall using four screws (not supplied) suited to the wall thickness.
NOTE: apply TDI20 screw caps (not provided) on 300/500 models.
English

4) Fit the hinges to secure the cover.

EWRC 5000 EWRC 300/500
Place the panel cover up against the wall, making it
stick to the perimeter seal. Then, while holding the Fit the hinges provided into their housings on
cover in place, fit the two hinges provided into the the right or left side of the panel and tighten the
corresponding holes and press them until you hear corresponding screws to secure them.
them click into place.

5) Close the cover and secure it with the screws

provided.

EWRC 300/500/5000 NT 4 - EN
 DANGER
RISK OF ELECTRIC SHOCK, EXPLOSION OR EXPOSURE TO ACCESSIBLE PARTS
The final application must disallow access to parts at hazardous voltage, as the instrument offers no intrinsic
protection against this risk.
Failure to follow these instructions will resultin death or serious injury.

6) DIN rail-mounted models with window only.

Use the dedicated plugs (code 1602149)
to prevent access to the inside of the panel
through the front window.
For EWRC NT 500 models with the plastic
knockout removed and no internal circuit
breaker, the end user is responsible for
ensuring that the open parts of the box are
not accessible.

7) EWRC 5000 only. Fit the door: align the front

door with the two hooks at the bottom of the
panel and push it towards the right until it
clicks into place.
1

English
8) Close the door. 2

ELECTRICAL CONNECTIONS
Output relay (default settings) Use parameter H00 to switch between NTC/PTC probe
• OUT1 relay 1 = Compressor types. SWITCH THE INSTRUMENT OFF AND ON
(or liquid line valve) AGAIN after the change.
• OUT2 relay 2 = Defrost
• OUT3 relay 3 = Evaporator fan Digital Inputs (default settings)
• OUT4 relay 4 = Light (EWRC 500/5000 only) • DI1 = Door switch
OUT1-4 common-line max 18 A • DI2 = 300/500 model: not configured;
• OUT5 relay 5 = Alarm/AUX (EWRC 500/5000 only) 5000 mode: external alarm
• DI3 = not configured
Probe inputs (default settings) Serial ports
• Pb1 = Cold room NTC probe • TTL for connecting to UNICARD / Copy Card
• Pb2 = Defrost end NTC probe • TTL for connecting to TelevisSystem
• Pb3 = Not configured • RS485 available ONLY with the optional plug-in
module for connecting to TelevisSystem / Modbus.

• Probe and digital inputs, OUT5 relay: 5.01 pitch screw terminals: electrical cables with a maximum section
of 2.5 mm2.
• Power supply and relay OUT1..OUT4: 7.62 pitch screw terminals: electrical cables with a maximum section
of 4 mm2.

5.08 mm (0.197 in.) pitch

mm 7 N•m 0.5...0.6
C
in. 0.28 Ø 3,5 mm (0.14 in.) lb-in 4.42...5.31
mm 2 0.2…2.5 0.2…2.5 0.25…2.5 0.25…2.5 2 x 0.2…0.75 2 x 0.2…0.75 2 x 0.25…0.75 2 x 0.5...1.5
AWG 24…14 24…14 22...14 22...14 2 x 24…18 2 x 24…18 2 x 22…18 2 x 20...16

7.62 mm (0.30 in.) pitch

mm 7 N•m 0.5...0.6
C
in. 0.28 Ø 3,5 mm (0.14 in.) lb-in 4.42...5.31
mm 2 0.2…4 0.2…2.5 0.25…2.5 0.25…2.5 2 x 0.2…1.5 2 x 0.2…1.5 2 x 0.25…0.75 2 x 0.5...1.5
AWG 24…11 24…14 22...14 22...14 2 x 24…16 2 x 24…16 2 x 22…18 2 x 20...16

5 - EN EWRC 300/500/5000 NT
 Yellow cable EWRC 300/500/5000 NT
UNICARD

COPY CARD

DISPLAY
RS485
OPTIONAL

EWRC 500NT/
5000 NT
ELIWELL only
OUT1 OUT2 OUT3 OUT4 OUT5

18 A max
COM
NC NO

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
English

GND + + + GND GND

PB1 PB2 + DI2 DI1

L H21 H22 H23 H24 H25
230 Vac
N
PB3/DI3

MODELS WITH DOOR AND INTERNAL CIRCUIT BREAKER

EWRC 500 NT BREAKER | EWRC 500 NT 4-DIN

Versions with a door on the front panel allow direct

access to the switch or to the upper part of the device
installed on the internal DIN rail.
To open the door, use both hands as shown in the
figure. Use your thumbs to apply gentle pressure at the
top to release the side tabs. Simultaneously with the
index finger gently pull the door toward you.
In versions provided with the miniature circuit breaker,
the installer must connect it to the power supply of the
electronic board through the wiring harness included
in the packaging.
The figure below shows the wiring diagram.
Versions with a door always have the omega DIN rail
installed.
Cable types and wire sections for the circuit breaker You can mount up to a maximum of 4 DIN modules,
including 2DIN miniature circuit breaker when present.
14 N•m 3.5
mm
in. 0.55 Ø 3,5 mm (0.14 in.)
C
lb-in 31
It is easy to enlarge the window on the DIN housing
from 2 to 4 DIN, using the knockouts as shown in the
mm 2 1…35 1…25
AWG 18…2 18…2
figure at the top right.

EWRC 300/500/5000 NT 6 - EN
For EWRC NT 500 models with plastic knockout removed and no thermal-magnetic breaker installed: the end user
is responsible for ensuring that open parts of the box cannot be accessed.

DANGER
RISK OF ELECTRIC SHOCK, EXPLOSION OR EXPOSURE TO ACCESSIBLE PARTS
Prevent access to parts at hazardous voltages, as the instrument offers no protection against this risk.
Failure to follow these instructions will resultin death or serious injury.

EWRC 500 NT BREAKER

OUT1 OUT2 OUT3 OUT4 OUT5
COM
NC NO

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
GND + + + GND GND

PB1 PB2 + DI2 DI1

H21 H22 H23 H24 H25

English
PB3/DI3 16 A max

L
230 Vac
N

DISPLAY
3-FIGURE UPPER DISPLAY
A plus the - sign
Display:
• Operating value
B • parameters label
• alarms, functions

if Upper display
blinking
C it means that the value of the
Lower Display can be modified
%RH D
4-FIGURE LOWER DISPLAY
E Display:
• parameters value
• probe value
F • function state
HACCP models
• time

7 - EN EWRC 300/500/5000 NT
 1 2 3 4 5 6 7 8 LED
No. LED colour description
17 RH amber not used

9
18 TIME amber access in case of time display or editing
13
10
19 DATA amber access in case of date display or editing
14
11

12
15
ALARMS
16
Off
Alarms LED 7 LED 8 Colour Buzzer
LED Buzzer
ALARM Red See “ALARMS TABLE” page 13
17 %RH
PANIC Red --- ---
18
LEAK DETECTOR Red ... ---
19
PANIC + LEAK DETECTOR Red --- (1)

(1) = As long as the Panic alarm persists it will not be possible to mute the buzzer from the keypad.

No. LED COLOUR ON FLASHING OFF

1 POWER SUPPLY green Power supply ON / Power supply OFF
2 ENERGY SAVING amber Energy saving ON / Energy saving OFF
3 NIGHT & DAY amber Night & Day ON / Night & Day OFF
4 HACCP amber HACCP menu / /
5 DEEP COOLING (DCC) amber Drip cooling cycle ON / Drip cooling cycle OFF
English

6 PUMP DOWN amber Compressor Pump Down ON / Compressor Pump Down OFF
9 COMPRESSOR amber Compressor ON delay Compressor OFF
10 DEFROST 1 amber defrost coil drainage No defrost
11 EVAPORATOR FANS amber Fans ON forced ventilation Fans OFF
12 DEFROST 2 amber defrost coil drainage No defrost
13 HACCP ALARM red HACCP alarm Not displayed No alarm
14 AUXILIARY (AUX) amber AUX ON / AUX OFF
15 LIGHT amber Light ON / Light OFF
16 CONDENSER FANS amber Fans ON / Fans OFF
ON: function/alarm ON; OFF: function/alarm OFF

KEYS
press and hold for about
No. KEY press and release NAVIGATION MENU Notes
3 seconds
ESC • Manual defrost
A • Functions Menu • Output
Defrost • Return to Main Menu
HACCP alarms
p UP • Scroll
B • Alarms Menu (always visible) / only on foreseen models
Alarms • Increase values
and if present
• Display SetPoint / probe values /
time (Models with clock)
• Confirm values display time
C SET • Confirm values Access Parameters menu
• Move right Models with clock only
• Access value edit mode
(upper display blinking)
q DOWN system INFO • Scroll
D Activate auxiliary function
AUX See Technical Support • Decrease values
E ON/OFF / Switch On/Off device /
F LIGHT / Switch light On/Off /

EWRC 300/500/5000 NT 8 - EN
USER INTERFACE

How to modify the SetPoint

• Press and release the SET key. The upper display will show SEt, the lower display will indicate the
current SetPoint value
• Press and release the SET key once more. The upper display will show SEt blinking
• Use the UP & DOWN keys to adjust the Setpoint value
• Press the ESC key several times (or keep it pressed) to return to the normal display

How to read the probe value

• Press and release the SET key. The upper display will show SEt, the lower display will indicate the
current SetPoint value
• Press and release the DOWN key. If the RTC clock is present, the time will be shown in the lower display
• Press and release the DOWN key once more. The upper display will show Pb1, the lower display will
indicate the value read by the room probe
• Press and release the DOWN key once more to read the value of probe Pb2 and Pb3 if configured
• Press the ESC key to return to the normal display.

How to modify the User Parameters

The ‘User’ parameters are the most useful ones. This document describes them in the Parameter
Table section.
1) Press and hold the SET key for 3 seconds until the display shows USr
2) Press and release the SET key again. The upper display will show the first parameter, the lower display
will indicate the current parameter value
3) Using the UP & DOWN keys, find the parameter that you wish to modify

English
4) Press and release the SET key again. The upper display will show the name of the blinking parameter
5) Use the UP & DOWN keys to adjust the parameter value.
6) Press and release SET to save the parameter value
7) Return to step 3) or press ESC several times to return to the normal display

USER PARAMETERS TABLE

This section describes the most commonly used parameters, which are always visible (the access password PA1 is not enabled by default).
For a description of all other parameters, see the user manual.
NOTE: the user parameters are NOT divided into sub-folders and are always visible. The same parameters are also visible in the respective fold-
ers ‘Compressor’, ‘Fans’, etc. (indicated also here to make the groupings clearer) in the password-protected Installer parameters menu.
PAR. DESCRIPTION M.U. RANGE DEFAULT
SEt Temperature control SEtpoint °C/°F -58.0...302 0.0
COMPRESSOR (CPr)
Activation differential
diF °C/°F 0 ... 30.0 2.0
N.B.: diF cannot be equal to 0.
Maximum value that can be assigned to the setpoint.
HSE °C/°F LSE ... HdL 50.0
NOTE: The two setpoints are interdependent: HSE cannot be less than LSE and vice-versa.
Minimum value that can be assigned to the setpoint.
LSE NOTE: The two setpoints are interdependent: LSE cannot be greater than HSE and vice °C/°F LdL ... HSE -50.0
versa.
Temperature value to be added algebraically to the Setpoint if reduced set enabled (Economy function). -30.0 ...
OSP °C/°F 0.0
Enabling can take place via key, function or digital input configured specifically for this purpose. 30.0
Minimum activation time of compressor before possible deactivation.
Cit min 0 ... 255 0
If Cit = 0 not active.
Maximum activation time of compressor before possible deactivation.
CAt min 0 ... 255 0
If CAt = 0 not active.
Controller switch-on time in the event of faulty probe.
Ont - if and OFt = 0, the compressor stays on permanently (ON), min 0 ... 255 10
- if Ont > 0 and OFt > 0, it operates in Duty Cycle mode.
Controller switch-off time in the event of faulty probe.
OFt - if OFt = 1 and the compressor stays off permanently (OFF), min 0 ... 255 10
- if Ont > 0 and OFt > 0, it operates in Duty Cycle mode

9 - EN EWRC 300/500/5000 NT
 PAR. DESCRIPTION M.U. RANGE DEFAULT
Delayed start. The parameter indicates that a protection is active on the general compressor relay
dOn actuations. At least the indicated time must elapse between the request and the actual activation of the sec 0 ... 255 2
compressor relay.
Delay time after power-off: the delay time indicated must elapse between deactivation of the compressor
dOF min 0 ... 255 0
relay and the next power-on.
Delay between switch-ons; the delay time indicated must elapse between two consecutive compressor
dbi min 0 ... 255 2
power-ons.
Delay in activating outputs after the instrument is switched on or after a power failure.
OdO min 0 ... 255 0
0 = Not active
dS2 DEFROST (dEF)
Defrost mode
0 = Electric defrost (OFF Cycle defrost), i.e. compressor not running during defrost);
dtY NOTE: electrical defrost + air defrost, when the fans are connected in parallel to the defrost output relay num 0 ... 2 0
1 = cycle inversion defrost (hot gas, or compressor on during defrost);
2 = “Free” mode defrost (independent from the compressor)
Interval between defrost cycles
hours/mins/
dit Interval between the start of two consecutive defrost cycles. 0 ... 255 6 hours
secs
0 = Function disabled (defrost NEVER performed).
Defrost interval count mode
0 = Compressor running time (DIGIFROST® method);
defrost active ONLY when the compressor is on.
N.B.: compressor running time is counted separately from the evaporator probe (count active also when
evaporator probe missing or faulty).
dCt num 0 ... 3 1
1 = Appliance running time; defrost counting is always active when the machine is on and starts at each
power-on;
2 = Compressor stopped. Every time the compressor stops, a defrost cycle is performed according to
English

parameterdtY;
3 = With RTC. Defrost at specific times set by parameters dE1...dE8, F1...F8
Defrost cycle enabling delay from request
dOH min 0 ... 59 0
Delay preceding start of first defrost after call.
Defrost timeout hours/mins/
dEt 1 ... 255 30 min
Determines the maximum defrost time on Evaporator 1. secs
Defrost end temperature -302.0 ...
dSt °C/°F 6.0
Defrost 1 end temperature (determined by evaporator probe 1). 1472.0
Defrost enabling request from power-on
Determines whether or not the instrument must defrost at power-up
dPO flag n/y n
(provided that the temperature measured at the evaporator will allow defrost).
n (0) = No, no defrost at power-on; y (1) = Yes, defrost at power-on.
FANS (FAn)
Fans lockout temperature; if the value read is greater than FSt, the fans will be stopped. The value may
FSt °C/°F -58.0...302 0.0
be positive or negative.
FAd Fans activation differential °C/°F 0.1 ... 25.0 0.1
Fdt Fans activation delay after a defrost cycle min 0 ... 250 0
dt dripping time. Dripping time. min 0 ... 250 0
Operating mode of evaporator fans during defrost.
dFd flag n/y y
n (0) = no (depending on the FCO parameter); y (1) = yes (fan off).
FCO Evaporator fans operating mode. The status of the fans will be:
With the compressor ON, the fans are thermostat-controlled. With the compressor OFF, it depends on FCO
FCO=0, fans OFF
FCO=1-2, fans thermoregulated num 0 ... 4 1
FCO=3-4, fans in duty cycle
Dutycycle: controlled by way of parameters “FOn” and “FOF”.
ALARMS (ALr)
AFd Alarms cut-in differential. °C/°F 0.1 ... 25.0 1.0
Probe 1 maximum alarm. Temperature value (intended either as distance from setpoint or as an absolute
HAL °C/°F LA1...302 5.0
value based on Att) above which the probe will trigger activation of the alarm signal.
Probe 1 minimum alarm. Temperature value (intended as distance from setpoint or as an absolute value
LAL °C/°F -58.0...HA1 -5.0
based on Att) beneath which the probe will trigger activation of the alarm signal.
Alarm exclusion time after device is switched on following a power failure.
PAO hours 0 ... 10 3
This parameter refers to high/low temperature alarms LAL and HAL only.

EWRC 300/500/5000 NT 10 - EN
PAR. DESCRIPTION M.U. RANGE DEFAULT
dAO Temperature alarm exclusion time after defrost. min 0 ... 250 60
Delay preceding temperature alarm signal.
tAO min 0 ... 250 0
This parameter refers to high/low temperature alarms LAL and HAL only.
DISPLAY parameters (diS)
LOCk. Setpoint edit lock. The parameter programming menu can still be accessed, and the settings
LOC changed, which means also that the status of this parameter can be changed so as to unlock the keypad. flag n/y n
n (0) = No; y (1) = Yes.
PA1 PAssword 1. When enabled (PA1 ≠ 0) this password provides access to level1 parameters (User). num 0 ... 250 0
Display values with decimal point.
ndt flag n/y y
n (0) = No (integers only); y (1) = Yes (displayed with decimal point).
Calibration of probe Pb1.
CA1 Positive or negative temperature value added to the value read by Pb1. This sum is used for both °C/°F -30.0...30.0 0.0
temperature display and temperature regulation purposes.
Calibration of probe Pb2.
CA2 Positive or negative temperature value added to the value read by Pb2. This sum is used for both °C/°F -30.0...30.0 0.0
temperature display and temperature regulation purposes.
Display mode during defrost.
0 = Displays the temperature read by the probe.
ddL 1 = Locks the reading at the temperature value registering via the probe when the defrost cycle starts num 0/1/2 1
and until the next time the SEt is reached.
2 = Displays the label dEF during defrosting and until the SEt is reached (or until Ldd has elapsed)
CONFIGURATION (CnF)
If one or more parameters in the folder are changed, the controller MUST be switched off and switched on again.
Selection of type of probe used (Pb1 ... Pb3).
0/1
H00 (0) = PTC num 1 (NTC)
(PTC/NTC)

English
(1) = NTC
Configuration of digital output 3 (OUT 3).
0 = disabled 7 = light
1 = compressor 8 = buzzer output
H23* 2 = defrost 1 9 = defrost 2 num 0 ... 13 3
3 = evaporator fans 10 = compressor 2
4 = alarm 11 = frame heater
5 = AUX 12 = condenser fans
6 = stand-by 13 = compressor pump down
Evaporator probe (Pb2) present
H42 n (0) = not present num n/y y
y (1) = present
rEL Firmware version release (e.g. 1,2,...). Read only. See Technical Support. / / /
tAb Map code. Read only. See Technical Support. / / /
COPY CARD parameters (FPr).
UL Upload. Transfers programming parameters from the instrument to a Copy Card / UNICARD. / / /
dL Download. Transfers programming parameters from a Copy Card / UNICARD to the instrument. / / /
Formatting. Deletes data on the Copy Card / UNICARD.
Fr NOTE: If parameter “Fr” is used, the data entered will be permanently lost. This operation / / /
cannot be reversed.
* H23 Installer (inS) level for the EWRC5000 model

IT IS POSSIBLE TO EDIT OTHER PARAMETERS AVAILABLE IN THE INSTALLER (inS) LEVEL OF THE INSTRUMENT
How to edit the installer level parameters

Procedure applies only to more advanced applications. In this case the parameters are arranged in
folders (Compressor / Defrost / Fans etc)
1) Press and hold the SET key for 3 seconds until the display shows USr
2) Use the UP & DOWN keys to select the inS parameter section
3) Press and release the SET key again. The display will show the first folder
4) Press and release the SET key again. The upper display will show the first parameter in the folder, the
lower display will indicate the current parameter value
5) Use the UP & DOWN keys to find the parameter that you want to modify
The procedure proceeds in a similar manner to that described for the User parameters (points 4-7)
11 - EN EWRC 300/500/5000 NT
 OPERATION IN DEFAULT CONFIGURATION
The instrument is configured for negative cold. For positive cold, disable the evaporator probe Pb2
(set H42=n) and set relay OUT3 (parameter H23=6) to prevent continuous ventilation.
COMPRESSOR
The compressor is active if the cold room temperature measured by Pb1 exceeds the value of SEt +
differential diF. The compressor stops if the cold room temperature detected by Pb1 falls below the SEt
value. The instrument includes compressor on/off protection*
DEFROST
Defrost is by means of electric heaters (parameter dty = 0) and the time counter is always active with the
instrument switched on (dCt=1).
Manual defrost
Manual defrost is activated by pressing and holding the ESC key (A).
If conditions are not right for defrosting, (e.g. the evaporator probe temperature is higher than the
defrosting end temperature) or the parameter OdO≠0, the display will blink three times to indicate that
the operation will not be performed.
Default Defrost settings
dit = 6 hours. interval between 2 defrost cycles
dSt = 6.0°C. Defrosting end temperature. Set by Pb2.
The Defrost cycle may terminate due to a timeout based on the parameter dEt (default 30 min).
EVAPORATOR FANS
The OUT3 relay is configured as the fan relay and is activated when required, according to the delay and
parameter settings*.
Default fan settings
dt = 0 min. dripping time
English

dFd = Y. Fans off during defrosting.

LIGHT (EWRC 500/5000)
The light is activated by pressing and holding the LIGHT key (F).
Since digital input D.I. 1 is configured as door switch, relay OUT4 (light) is activated when the door is
opened. The light also switches on with the instrument in standby*.
ALARM RELAY (EWRC 500/5000)
Relay OUT5 is configured as alarm relay and is activated in the case of alarms, according to delays and
parameter settings. *FOR MORE INFORMATION READ the manual, code 9MA*0258

SUPERVISION

EWRC 300/500/5000 NT can be connected to:

• TelevisSystem or third-party remote control systems via Modbus protocol
• DeviceManager fast parameter configuration software

The connection is direct RS-485 using the optional RS485/TTL plug-in module (not included). See the
Wiring diagram.
NOTE: if using the TTL port to communicate, disconnect the RS-485 port and vice-versa.

*FOR MORE INFORMATION READ the manual, code 9MA*0258

EWRC 300/500/5000 NT 12 - EN
TECHNICAL SUPPORT
Have the following information available when contacting Eliwell Technical Support:
• IdF firmware version (e.g. 554)
• rEL firmware version release (e.g. 1,2,...)
• tAb map code
• rC instrument model (e.g. 300 or 500)
To obtain this information:
• Press and release the DOWN / INFO key
• Press and release the DOWN key once more to display other information about the instrument.
• Press the ESC key to return to the normal display.

ALARMS AND TROUBLESHOOTING

How to display the alarms
1) Press and release the UP key. The upper display will always show the label ALr. The lower display will
show:
• nOnE if no alarms active
• SYS to indicate system alarms - see Alarms Table
• HACP to indicate HACCP alarms - see HACCP alarms
2) Using the UP & DOWN keys, find the type of alarm that you want to check
System alarms
The upper display will show the label ALr, the lower display will indicate the alarm code - see Alarms
Table

English
• Using the UP & DOWN key, scroll the other alarms
• Press the ESC key to return to the previous alarm code, press the ESC key several times (or keep it
pressed) to return to the normal display
HACCP ALARMS • AVAILABLE ONLY FOR HACCP MODELS
The instrument logs high and low temperature alarms for the cold room probe, as well as any power
failures. The alarm types and the duration and start time of the alarm itself will be displayed in the alarms
folder ALr. It is possible to disable the recording of alarms and/or resetting of HACCP alarms. See
Functions Menu.
FOR MORE INFORMATION READ the manual, code 9MA*0258

ALARMS TABLE
This section lists alarms associated with the default configuration of the instrument.
For a description of alarms relating to custom configurations, refer to the user manual or contact Eliwell Technical Support.
Label Cause Effects Problem solving
• Label E1 displayed
Pb1 room probe faulty • Maximum and minimum alarm regulator
• Check probe type NTC/PTC (see H00)
•M easured values are outside operating disabled
E1* • Check probe wiring
range • Compressor operation based on
• Replace probe
• Probe faulty/short-circuited/open parameters “Ont” and “OFt” if set for duty
cycle.
Pb2 defrost probe faulty
• Label E2 displayed • Check probe type NTC/PTC (see H00)
• Measured values are outside operating
E2* • The Defrost cycle will end due to time- • Check probe wiring
range
out (Parameter “dEt”) • Replace probe
• Probe faulty/short-circuited/open
Pb1 LOW temperature alarm
• Recording of label LA1 in folder ALr • Wait for the temperature value read by Pb1
LA1 • Value read by Pb1 < LAL after time of
• No effect on regulation to come back above LAL+AFd
tAO.
Pb1 HIGH temperature alarm
• Recording of label HA1 in folder ALr • Wait until temperature value read by Pb1
HA1 • value read by probe Pb1 > HAL after
• No effect on regulation returns below HAL-AFd.
time of “tAO”.

13 - EN EWRC 300/500/5000 NT
 This section lists alarms associated with the default configuration of the instrument.
For a description of alarms relating to custom configurations, refer to the user manual or contact Eliwell Technical Support.
Label Cause Effects Problem solving
End of defrost cycle due to time-
out rather than due to defrost end • Recording of label Ad2 in folder ALr • Wait for the next defrost cycle for automatic
Ad2
temperature being read by the defrost return
probe
• Digital input is activated
(set as door switch) • Recording of label OPd in folder ALr • Close door
OPd
See para. H11/H12/H13 • Regulator locked (see para. dOA/PEA) • Depends on delay set by parameter OAO
• Depends on delay set by parameter tdO
**Models with clock only
Functions associated with clock not
E10** Clock alarm: clock faulty or unpowered Contact Eliwell Technical Support
controlled
for a long time
ALL ALARMS
• Alarm icon on continuously
• Buzzer (if present) and alarm relay (OUT5) activated, except Ad2
• Press any key to mute the alarm. The LED changes from a steady light to a blinking light.
NOTE: the buzzer is deactivated while the alarm relay remains active
*E1 - E2: If simultaneous they will be shown alternately on the display at a frequency of 2 seconds

TECHNICAL DATA (EN 60730-2-9:2010, EN 61439-1:2011 / 61439-2:2011 / EN 60204-1:2006)

English

DESCRIPTION
Front panel IP65
Classification Electronic automatic control device (not safety device) for stand-alone installation
wall
EWRC300/500: spacing
holes A-B 116 mm (4.57 in); holes C-D 87 mm (3.42 in); holes A-C 235 mm (9.25 in)
Hinges are available for mounting on special compartments for opening the cover both right
Installation and left.
Screw on the respective anchoring screws taking care that the hinges are fitted well and lie flush
so that they do not interfere with the compression of the seal
wall
EWRC5000: See Mechanical Installation paragraph
Type of action 1.B
Pollution class 2 (IEC 60664-1:2007)
Panel type Fixed panel
Maximum installation site altitude 2000 m (2187 yd)
Weight < 2 kg (< 4.41 lb)
Panel use Internal use
Material class IIIa
Over voltage category II (IEC 60664-1:2007)
Nominal pulse voltage 2500 V
Operating temperature -5 ... 50 °C (EN 60730-2-9:2010)
Power supply 230 Va ± 10 % 50/60Hz
Control EWRC NT electronic controller
Power consumption 11 VA max
Digital outputs (relay) refer to the label on the device
Fire resistance category D
Software class A
Connection device on external flexible cable, Y type connection
Ball test temperature 100 °C ( 212 °F)
EWRC 300/500/5000 NT 14 - EN
DESCRIPTION
EWRC 500 BREAKER
Circuit breaker Two-pole (2P)

ELECTRICAL SPECIFICATIONS

DESCRIPTION
Rated voltage (Un) 230 Vac
Rated operating voltage (Ue) 230 Vac
Rated insulation voltage (Ui) 230 Vac
Conditioned short circuit current (Icc) < 4.5 kA
Rated frequency (fn): 50/60 Hz
EWRC 500 BREAKER:
Rated impulse withstand voltage (Uimp) 4 kV
Rated panel current (InA) 16 A
Rated circuit current (InC) 16 A

FURTHER INFORMATION

English
DESCRIPTION
Container PC+ABS
EWRC 300/500: front panel 213 x 318 mm, depth 102 mm
Dimensions EWRC 500 BREAKER: front panel 221 x 318 mm, depth 107 mm
EWRC 5000: front panel 420 x 360 mm, depth 147 mm
screw-on terminals (see wiring diagram)
Connections
with internal housing for magnetothermal switch, remote control switch, contactor, etc. on DIN rail
Storage temperature -20 ... 85 °C
Operating humidity
10...90% RH non-condensing
Storage humidity
–50…110 (NTC) / –55…150 °C (PTC) without decimal point, on 2 displays:
Display range
(upper display) 3 digit + sign/ (lower display) 4 digit
Analogue Inputs 3(2) NTC inputs selectable with parameter H00
Digital Inputs 2(3) voltage-free digital inputs configurable with parameter H11/H12/H13
EWRC 300 EWRC 500/5000
• OUT1 SPST 2 HP 12(12) A 250 Vac • OUT1 SPST 2 HP 12(12) A 250 Vac
• OUT2 SPST 1 HP 8(8) A 250 Vac • OUT2 SPST 1 HP 8(8) A 250 Vac
Relay outputs • OUT3 SPST 1/2 HP 8(4) A 250 Vac • OUT3 SPST 1/2 HP 8(4) A 250 Vac
common-line max 18 A • OUT4 SPST 1 HP 8(8) A 250 Vac
• OUT5 SPDT 1/2 HP 8(4) A 250 Vac
common-line max 18 A
Buzzer only on models where this is provided
• 1 TTL port for connection to Unicard / Copy Card
• 1 TTL port for connection to TelevisSystem
Serial ports • 1 RS-485 serial port for connection to TelevisSystem / Modbus
(use with optional plug-in module)
Note: if using the TTL port to communicate, disconnect the RS-485 port and vice-versa.
Accuracy better than 0.5% of full scale +1 digit
Resolution 1 or 0.1 °C
Clock backup Up to four days in the absence of an external power supply
15 - EN EWRC 300/500/5000 NT
Food safety
The device complies with Standard EN13485 as follows:
- suitable for storage
- application: air
- climate range A
- measurement class 1 in the range -25 °C to 15 °C (-13 °F to 59 °F) (only when using Eliwell probes)

Permitted use
This equipment is used to control cold rooms in commercial refrigeration sectors.
For safety reasons, the equipment must be installed and used in accordance with the instructions provided.
Prohibited use
Any use other than that described in the previous paragraph, “Permitted use”, is strictly forbidden.
The relays supplied are electromagnetic and are subject to wear. The protection devices required by international or
local laws must be installed outside the equipment.

LIABILITY AND RESIDUAL RISKS

The liability of Eliwell Controls srl is limited to the correct and professional use of the product according to the
directives referred to herein and in the other supporting documents, and does not cover any damage (including but
not limited to) the following causes:
unspecified installation/use and, in particular, in defiance of safety requirements of established legislation and/or
specified in this document;
installation/use on equipment which does not comply with established legislation and technical standards
tampering with and/or modification of the product.

DISCLAIMER
This document is the exclusive property of Eliwell and cannot be reproduced or circulated unless expressly
authorised by Eliwell. All possible care has been taken to ensure the accuracy of this document; nevertheless,
Eliwell Controls srl cannot accept liability for any damage resulting from its use. The same applies to any person or
company involved in the creation and preparation of this document. Eliwell reserves the right to make aesthetic or
functional changes at any time without notice.

DISPOSAL
The equipment (or product) must be subjected to separate waste collection in compliance with
the local legislation on waste disposal.

Eliwell Controls s.r.l. Technical Customer Support

Via dell’Industria, 15 • Z.I. Paludi T +39 0437 986 300
32016 Alpago (BL) ITALY E techsuppeliwell@schneider-electric.com
T +39 0437 986 111
www.eliwell.com Sales
T +39 0437 986 100 (Italy)
T+39 0437 986 200 (other countries)
E saleseliwell@schneider-electric.com

9IS54389 - EN - rel. 09/17

© Eliwell Controls s.r.l. 2014-17 All rights reserved.