ADAC 4000 Boiler Book PDF
ADAC 4000 Boiler Book PDF
ADAC 4000 Boiler Book PDF
Boiler Book
09/2017
BOILER BOOK ADAC 4000
CONTENTS
FEATURES AND BENEFITS 3
Standard Features 3
Optional Features 3
PRODUCT OFFERING 4
Standard Features, Single Tank System 4
Optional Features, Single Tank System 4
ENGINEERING DATA 5
SAMPLE SPECIFICATIONS 6
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BOILER BOOK ADAC 4000
The CB ADAC 4000 Advanced Deaerator Control provides a PLC based control system for a
deaerator, surge tank, two tank deaerator-and-surge, or Duo-tank installations. The system is capable
of controlling operation of boiler feed and/or transfer pumps, maintaining tank levels, monitoring and
responding to system demands, and recording/annunciating alarm conditions.
The ADAC can run as a stand-alone system or connect to a CB-HAWK Master Panel or customer
building automation system for monitoring purposes.
Optional Features
• 10” PanelView Plus in lieu of 7” (10” is standard on two tank systems)
• Alarm bell, horn, or electric sounder
• GEMS Mini Sure Site level indicator with 4-20 mA transmitter, DP Level transmitter or discrete
level switches
• Steam or water flow transmitters
• Manual hard wired controls for any 4-20 mA controlled valve
• Siemens motorized make-up valve
• RSLinx OPC compliant remote monitoring software
• Recirculation bypass (tank one only)
• NEMA 4/12 entrance panel
• NEMA 4x electrical panel
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BOILER BOOK ADAC 4000
PRODUCT OFFERING
STANDARD FEATURES, SINGLE TANK SYSTEM
• Compact Logix L33ER processor
• 7” color touch screen HMI
• Stack light
Programming and I/O cards for the following:
• I/O for 1-6 pumps using contactors, soft starters, or combination starters
• Hard wired fixed location level inputs for Hi and Low water alarms
• Low water pump cutoff audible alarm output
• Stack light outputs
• Recirculation bypass output
• Chemical feed relay
• Boiler 1-6 ‘Feed Water Required’ inputs for hard piped one pump per boiler systems using
contactors, combination starters or soft starters only.
• Pump proving switch inputs for up to 6 feed pumps
• Analog inputs for tank pressure, temperature, level, and discharge header pressure
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BOILER BOOK ADAC 4000
ENGINEERING DATA
• Supply voltage: 120 VAC (102 VAC - 132 VAC), 50 or 60 Hz
• Maximum total connected load: 500 VA
• Operating temperature limits: 32 to 130°F
• Humidity: 85% relative humidity continuous, non-condensing
• 0.5G continuous vibration
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BOILER BOOK ADAC 4000
SAMPLE SPECIFICATIONS
B. Optional Components
12. Veris Current Switch - sized for pump
13. Electric actuators for pump water recirculation bypass - sized for system
14. PowerFlex 70, 400, or 700 Variable Speed Drive
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4. For a common boiler feedwater pump discharge system, PLC monitors 4-20 mA
pressure/flow signal from boiler feedwater header to determine when to
command pumps to start/stop. In a VFD system the 4-20 mA pressure/flow
signal will determine VFD output.
5. If the pumps are feeding individual boilers, pumps will be turned on/off based on
individual discrete 110 VAC signals from each boiler.
6. PLC/VFDs can only control pumps that are in AUTO mode. Pumps in manual
will run continuously. The hard wired Aux Low Water pump cutoff will prevent
pumps from running in any mode if water level drops below set point.
B. Transfer pump control
1. System will be able to support up to 3 pumps for transferring water from the
Surge tank to the DA. Pumps are selected using the HMI; no PC or additional
software required. Upon selection, graphics and control logic will be activated
automatically.
2. Pumps may be configured to operate in a lead/lag sequence based on system
demand. In addition, order of pump alternation can be automatically rotated to
share running time and wear equally between pumps.
C. DA make-up water level control
1. The lead pump runs continuously. If DA tank level falls below set point, make up
valve is already fully open, and condensate tank discharge pressure falls below
set point, the PLC will command the lag pump to start.
2. When surge tank discharge pressure falls below set point, the PLC will sound an
alarm. Operator must respond to the alarm condition and reset the alarm.
3. When level control is in manual mode, the make up valve can be opened or
closed from the HMI screen, or optionally by a manual potentiometer. Either
method will allow the operator to manually adjust the valve between fully open
and fully closed to control the incoming flow of make up water.
4. An optional Surge tank MUV biasing mode is available. A bias may be enabled
(user defined) to force the primary MUV feeding the DA tank to close as level
falls in the surge tank. The bias factor applied to the primary MUV position
increases as the level in the surge tank gets lower. This prevents the surge tank
from pumping down to low water cutout so it can continue to run while
condensate is returned to it. The secondary valve would in this case be plumbed
to the DA from a separate source and add water to the DA to be heated,
deaerated and sent to the boilers instead of adding cold water to the surge tank.
D. Surge tank make up water level control
1. The PLC receives a 4-20 mA signal indicating surge tank water level. Signal is
compared to the operator input set point and valve modulates accordingly to
control the incoming flow of make-up water.
2. When the valve is in manual mode the HMI or optional manual potentiometers
will allow the operator to manually adjust the valve between fully open and fully
closed.
E. Pump Lead/Lag and Alternating Control
1. Selection of pumps and rotation schedule are configurable from the HMI. PLC
will monitor all pumps and determine availability; pumps may be taken out of
rotation for maintenance.
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BOILER BOOK ADAC 4000
2. When system is in auto rotation, if a pump is not available the PLC will alternate
to the next available one. If no pumps are available an alarm will sound,
requiring manual reset. PLC will maintain equal run time between all pumps.
3. If Lead/Lag option is selected, pump start/stop set points are set from the HMI.
Start point is based on percentage of set point achieved by previous pump in
sequence. PLC internal timers will maintain minimum load fluctuations.
4. If Lead/Lag and VFD options are selected, VFD% to start/stop lag pump is set
from the HMI. When lag function is activated, VFDs function in unison
modulation until the speed reaches VFD stop point; then lag pump shuts off.
5. When pump alternation is selected, alternation schedule is configured from the
HMI. When current pump run time is met, next pump will start and come up to
speed; previous pump will then stop.
F. Chemical Feed Control
1. One set of dry contacts wired to terminal blocks will be provided to change state
when any boiler feed pump is running, enabling customer chemical feed pump.
2.7 ADDITIONAL ADAC SYSTEM FUNCTIONS:
A. A pressure sensor mounted in steam space monitors Deaerator pressure.
B. A set of contacts on each pump’s overload relay provides indication of pump failure. If
VFDs or soft starters are used, a fault contact is monitored by the PLC to indicate
pump failure.
C. A set of contacts on each pump starter indicates pump running. If VFDs or soft
starters are used, a contact is monitored by the PLC to indicate run status.
D. A selector switch is mounted at each pump starter to allow Hand-Off-Auto switching.
‘Hand’ ignores all external signals except Aux Low Water Cutoff, ‘Off’ ignores all
signals and prevents pump from running, ‘Auto’ allows pump to run based on
commands from the PLC.
2.8 ALARM FEATURES
A. DA Tank water level alarms
1. Low Water — If water level as indicated by the tank level device falls to a pre-
set point, the PLC will sound an alarm, display a message on the HMI, log a
message to the alarm history file, and turn on the appropriate stack light.
2. Low Low Water — If water level falls further to the pre-set Low Low Water point,
the PLC will sound an alarm, display a message on the HMI, log a message to
the alarm history file, and turn on the appropriate stack light.
3. Hi Water — If water level as indicated by the tank level device rises to a pre-set
point, the PLC will sound an alarm, display a message on the HMI, log a
message to the alarm history file, and turn on the appropriate stack light.
4. Aux Low Water — If water level falls to the pre-set Aux Low Water point, the
hard wired Aux Low Water device will open, signalling the PLC and shutting
down all pumps for that tank. The PLC will sound an alarm, display a message
on the HMI, log a message to the alarm history file, and turn on the appropriate
stack light.
B. Surge Tank water level alarms (same as above)
2.9 ADAC COMMUNICATION OPTIONS
A. Ethernet connectivity
1. PLC features an OPC compliant Ethernet/IP port for connection to a Building/
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e-mail: info@cleaverbrooks.com
Web Address: http://www.cleaverbrooks.com