CleaverBrooks CB120Z Instruction Manual

750-271 1
DESCRIPTION
The Cleaver-Brooks CB120Z expands on the standard CB120 (see manual 750-264) by combining
boiler control functions with the same burner management control found in the CB120. The result is
a single compact package that can directly control the boiler's output firing rate based on either input
pressure or temperature or both. The CB120Z System is designed to provide the proper burner
sequencing, ignition and flame monitoring protection on automatically ignited oil, gas, and combina-
tion fuel burners. Through the display, the operator programs the desired setpoint, cut in, cut out and
modulating range and with PID control, the CB120Z System controls the burner/boiler from start up
through shutdown, precisely maintaining the desired setpoint. The CB120Z System continuously
monitors interlocks and limits found in the L1-3 and 3-P circuits as it programs the burner/blower
motor, ignition and fuel valves to provide for proper and safe burner operation. VFD and LCD dis-
plays are available that may be either plugged in or mounted remotely to give full language descrip-
tors of current status and diagnostic lockout information as well as provide a user friendly menu
system to make setting the boiler parameters easy and understandable. Through SMART LED'S,
located on the front cover or through the display interface, the control provides current operating sta-
tus and lockout information in the event of a safety shutdown. Following are some of the major con-
trol and monitor capabilities provided by the CB120Z System:
•Operating Control Function for automatic sequencing of the boiler system to start and stop the
boiler to meet system demand.
•Full Modulation Control of fuel and combustion air through the firing rate motor to meet sys-
tem demand.
•Solid State Sensors to monitor steam pressure, water temperature, stack temperature, boiler
water temperature, or outdoor air temperature.
•High Pressure and Temperature Alarm Limits based on inputs from solid state sensors.
Exceeded limits will open interlock circuit to the flame safeguard control for shutdown of the
burner and boiler.
•Cold Start Thermal Shock Protection to slowly increase the burner firing rate on a cold start
to limit mechanical stress due to thermal differences.
•Multiple Lead/Lag operation of two or more boilers.
•User-friendly keypad display system in either VFD or LCD format featuring the all-info dis-
play mode, program and review of system setpoints and operating parameters.
•Remote Communication Capability allows reading and writing of all setpoint information.
•Password Protected Parameters (two levels of security) to restrict unauthorized entry and
modification of system setpoints and operating parameters.
CB120Z
MICROPROCESSOR-BASED
BURNER MANAGEMENT CONTROL
WITH INTEGRATED BOILER
CONTROL OPERATION
APPROVED

2750-271
•Marginal High Pressure and Temperature Alarm Limits based on input from solid state sen-
sors to indicate system approaching high alarm limits.
•Programmable Maximum High Fire Position of modulating firing rate damper motor.
•Assured low fire cut off prevents unnecessary stress caused by burner shut down at high fire.
•Auto / Manual firing rate control with bumpless transfer
A complete CB120Z System includes the chassis equipped with the type of flame amplifier required
for the application, appropriate flame detector, plug-in programmer module, appropriate tempera-
ture/pressure transducer, wiring base and alpha-numeric display. Interchangeable type programmer
modules allow for complete versatility in selection of function, timing and flame failure response
times. Refer to CB120Z PROGRAMMER SELECTION later in this document for the various com-
binations of programmer and display modules.
The chassis/flame amplifier module includes mounting screws and blank display module. The dis-
play module (833-3905 or 833-3906), if required, must be ordered separately. Functions such as pre-
purge time, recycling or non-recycling interlocks, high fire proving interlock, and trial for ignition
timing of the pilot and main flame are determined by the programmer module. The CB120Z System
can be used with ultra-violet, autocheck infrared, flame rod, self-check ultraviolet flame scanners or
direct coupled by choosing the proper chassis/flame amplifier module.
Wiring bases for the CB120Z control are available pre-wired with 4 foot lead wires color coded and
marked for easy installation or with an integral terminal block capable of a accepting up to 2 X 14
AWG wires. The wiring base terminal block is available with knockouts for conduit or open ended
for cabinet mounting. The pigtail wiring base is 4" X 5" and the terminal block wiring base is 4" X
7".
Additional functions of the CB120Z System include:
•A non-volatile memory which allows the control to remember its history and present position
even when power is interrupted.
•A consistent flame signal read-out via display module or 4-20 mA output.
•Read-out of main fuel operational hours and complete cycles via display module.
•Modbus communications via RS485 multi-drop link.
•Proof of fuel valve closure during off cycle.
•Burn-in time of program parameters occurs after 8 hours of main valve on time.
•A run/check switch which allows the operator to stop the program sequence in any of four dif-
ferent positions (Purge, PTFI, MTFI or Auto).
•Remote Display mounting with NEMA 4 protection.
•Remote Reset
•Programmable communication baud rate allows for DCS compatibility.
•Keypad selectable language readout.
•Revert to pilot can increase burner turn down.
•Additional terminals provided for applications requiring additional inputs and outputs.
CAUTION: While programmers are mechanically interchangeable in that they mate with a
common chassis/amplifier module, you should select the correct model for your application.
Inappropriate application of a control could result in an unsafe condition hazardous to life
and property. Selection of a control for a particular application should be made by a compe-
tent professional, such as a boiler/burner service technician licensed by a state or other gov-
ernment agency.
WARNING: Electro-mechanical high steam pressure or high water temperature limits must
remain in the running interlock circuit of the flame safeguard control.

750-271 3
TABLE OF CONTENTS
CB120Z SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
PART NUMBERS AND APPROVALS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
ORDERING INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
INSTALLATION PROCEDURE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Wiring Base. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Pressure And Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
CB120Z PROGRAMMER SELECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
PTFI*MTFI Timings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
LED INDICATOR LIGHTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
DESCRIPTION OF FUNCTIONS OF OPERATING CONTROLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
SETTING PROGRAMMER PARAMETERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
PROGRAM SET UP SUB-MENU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
To View And Modify A Programmable Parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
GETTING STARTED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
All-info Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Set the Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Units of Measure / Display Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
System Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Control Variable Configuration Sub-menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
SEQUENCE OF OPERATION - OPERATING CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
SEQUENCE OF OPERATION - MODULATING CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
SEQUENCE OF OPERATION - MARGINAL AND HIGH ALARM LIMITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
SEQUENCE OF OPERATION - LEAD/LAG CONTROL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
ALTERNATE USES FOR LAG2 INPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
SEQUENCE OF OPERATION - STANDBY WATER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Standby Lag Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Standby Thermal Shock Protection Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
ALTERNATE USES FOR AUX 1 INPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
ALTERNATE USES FOR AUX 2 INPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
FLAME SCANNERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Installation - UV Scanners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Operation - 45UV5 & 55UV5 Self-checking UV Scanner. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Wiring - UV Scanners. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Installation - Infrared Scanner Type 48PT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Operation - IR Learn. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Installation - 69ND1 Flame Rod. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
SYSTEM INFO SUB-MENU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
SYSTEM OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Operating Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Start-up (Normal Cycle) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Normal Shutdown. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Suggested Wiring Diagram for YP138 Programmer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
LOCKOUT CODES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Safety Shutdown. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Diagnostic Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Resetting the Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Lockout Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Lockout History Sub-menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
COMMUNICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Message Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Modbus Message Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Interlock Annunciator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Boiler Operating Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Explanation of Logstat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
OPERATIONAL FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
4-20 Ma Test Jacks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Check-run Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
OPERATIONAL TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Test Checkout Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Suggested Grounding Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
CB120Z PROGRAMMING / SETUP GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

4750-271
CB120Z SPECIFICATIONS
Control:
Supply Voltage:
120 VAC (+10%, -15%) 50/60 Hz
Power Consumption:
25 VA
Temperature Rating:
-40°C (-40°F) to +60°C (140°F)
Protection Category:
Control NEMA 1 (IP01)
Display, Remote mounted NEMA, 4X (IP66)
Unit Dimensions:
Wiring base 60-2850-1: - 4.0" (101 mm) W x 5.0" (127mm) H
Wiring Base 60-2852-1, 60-2854-1: - 4.0" (101 mm) W x 7.0" (178 mm) H
Shipping Weight:
Approx. 3.2 lbs. (1.45kg)
Temperature Sensors:
Temperature Measurement Range:
TS350-X: 32°F to 350°F (0°C to 176°C)
TS752-X: 32°F to 752°F (0°C to 400°C)
RTD Type: Platinum, 100 ohms +-0.1% @32°F (0°C)
Temperature Coefficient: .00385 ohms/ohms/C
Output: 4-20 mA, linear with temperature
Operating Temperature Range: -13°F to 185°F (-25°C to 85°C)
Accuracy: +- 0.75% of span
Thermowell Case: 300 Series stainless steel
Mechanical Fittings: 1/2-14 NPT
Pressure Sensors:
Pressure Measurement Range: 0 to 15, 0 to 30, 0 to 200, 0 to 300 psig
Excitation Voltage: 9-30Vdc (supplied by CB120Z control)
Accuracy: +/- 0.25% Full Scale (at constant temperature)
Output: 4-20 mA, linear with pressure
Maximum Over Pressure: 200% of full scale
Maximum Burst Pressure: 800% of full scale
Operating Temperature Range: -40°F to 185°F (-40°C to 85°C)
Fitting: 1/4" NPT Male
Electrical: 1/2" Conduit and Terminal Strip

750-271 5
OPERATING TEMPERATURE LIMITS
LOAD RATINGS:
Combination of fuel and igniter terminals
Composition of each combination
Maximum connected load not to exceed 2000 VA
COMPONENT MAXIMUM MINIMUM
Chassis/amplifier 140°F 60°C -40°F -40°C
Programmers 140°F 60°C -40°F -40°C
833-3905 VFD Display 140°F 60°C -40°F -40°C
833-3906 LCD Display 140°F 60°C -4°F -20°C
Scanner UV 200°F 93°C -40°F -40°C
Scanner IR 140°F 60°C -40°F -40°C
Flame Rod (Tip 2460°F) 1500°F 816°C -40°F -40°C
Temperature Transducers 185°F 85°C -13°F -25°C
Pressure Transducers 185°F 85°C -40°F -40°C
Humidity: 90% R.H. (Non-condensing)
Terminal Typical Load A. Maximum Rating
@120V-50/60 Hz B. Maximum Rating @230V-50/60 Hz C. Alternate Rating
M Burner/Blower Motor 9.8 F.L.A. *
58 L.R.A. 4.0 F.L.A. * 20 L.R.A. 240 VA Pilot Duty (Motor Starter Coil)
10-11-12-X Modulator 125 VA Pilot Duty
A Alarm 50 VA Pilot Duty
Terminal ratings may be selected from either column A or C for 120 VAC or from either column B or C for 30 VAC:
(select the rating from the column which best applies to the connected load on that terminal).
* F.L.A. = full load amps; L.R.A = locked rotor amps
Combination No. Pilot Fuel
Trm 6 Main Trm 7 Ignition Trm 5 Delayed Valve Trm W
1C E No Load No Load
2B E No Load No Load
3No Load E No Load B
4EEANoLoad
5No Load E A E
6DEANoLoad
7D DAD
8No Load D A No Load
AB C D E
4.5A Ignition
@120 VAC 50 VA Pilot Duty
plus 4.5A igni-
tion@ 120 VAC
180 VA Ignition plus
motor valves with:
660 VA inrush, 360
VA open, 250 VA
hold.
2A Pilot Duty
@120 VAC
65 VA Pilot Duty plus
Motor valves with:
3850 VA inrush, 700
VA open 250 VA hold.
2.2A Ignition
@230 VAC 50 VA Pilot Duty
plus 2.2A ignition
@230 VAC
1A Pilot Duty
@230 VAC

6750-271
ELECTRICAL RATINGS
VA ratings (not specified as pilot duty) permit the connection of transformers and similar devices
whose inrush current is approximately the same as their running current.
VA Pilot Duty ratings permit the connection of relays, solenoid valves, lamps, etc. whose total oper-
ating load does not exceed the published rating and whose total inrush current does not exceed 10
times the rating.
Running and locked rotor ratings are intended for motors. VA and VA Pilot Duty loads may be added
to a motor load provided the total load does not exceed the published rating.
APPROVALS
Underwriters Laboratories Inc.:
MCCZ File MP1537
Controls, Primary Safety - Listed
MCCZ2 File MP1537
Controls, Primary Safety - Component
MCCZ7 File MP1537
Controls, Primary Safety Certified for Canada
MCCZ8 File MP1537
Controls, Primary Safety Certified for Canada - Component
Factory Mutual: FM Class 7610
Acceptable by: Industrial Risk Insurers (I.R.I.)
CE: Gas Appliances
Gas Appliance Directive: 90/396/EEC
Low Voltage Directive: 73/23/EEC
EMC Directive: 89/336/EEC
GASTEC: 0063BT1754
(EN298, 2003; EN230, 2005)
DVGW Reg. No. NG-2510BT0347
DIN-CERTCO: Reg. No. 5F233/08
CAUTION: Published load ratings assume that no contact be required to handle inrush cur-
rent more often than once in 15 seconds. The use of control switches, solenoid, relays, etc.
which chatter will lead to premature failure. It is important to run through a test operation
(with fuel shut off) following the tripping of a circuit breaker, a blown fuse, or any known
instance of chattering of any external current consuming devices.
WARNING: This equipment generates and can radiate radio frequency energy, and if not
installed and used in accordance with the instruction manual may cause interference to
radio communications. It has been tested and found to comply with the limits for a Class A
computing device pursuant to Subpart J of part 15 of FCC Rules, which are designed to
provide reasonable protection against such interference when operated in a commercial
environment. Operation of this equipment in a residential area is likely to cause interference
in which case the user, at his own expense, will be required to take whatever measures which
may be required to correct the interference.

750-271 7
PART NUMBERS AND APPROVALS
APPLICABLE BULLETINS
Table 1: Agency Approvals
CB120Z
Chassis/Flame Amp. Module
833-3726 (UV) XXXXXX
833-3727 (UVSC) XXXXXX
833-3728 (IR) XXXXXX
CB120Z Programmer Module
833-3901 XXX
833-3902 XXX
833-3903 XXX
833-3904 XXX
CB120Z Displays
833-3905 XXXXXX
833-3906 XXXXXX
CB120Z Wiring Bases
833-3731 XX XXX
833-3730 X XXXX
X = CERTIFICATION IN HAND
Programmers, Non-recycle Operation
750-278Programmers, Recycle Operation
Programmers, Non-modulating
Displays 750-277
Wiring base installation, 60-2850-1 133-701
Wiring base installation, 60-2854-1 133-702
Pressure/Temperature Sensors 750-279
Interlock Expansion Module YZEM-3001
APPROVED

8750-271
ORDERING INFORMATION
CB P/N CB120Z Chassis/Flame Amplifier Module
833-3726 120 VAC input with UV non self-check amplifier
833-3727 120 VAC input with UV self-check amplifier
833-3728 120 VAC input with IR auto-check amplifier
833-3729 120 VAC input with IR2 auto-check amplifier - FGR APPLICATIONS ONLY
CB P/N CB120Z Programmer Modules
833-3901 Keypad selectable parameters, non-recycle operation, modulation, open damper proving, 4 second FFRT
833-3902 Keypad selectable parameters, non-recycle operation, modulation, open damper proving, 2 second FFRT
833-3903 Keypad selectable parameters, non-recycle operation, modulation, open damper proving, indefinite pilot hold,
revert to pilot from auto, 4 second FFRT
833-3904 Keypad selectable parameters, non-recycle operation, modulation, open damper proving, indefinite pilot hold,
revert to pilot from auto, 1 second FFRT
CB P/N CB120Z Displays
833-3905 Display, 2 line X 16 characters, VFD, with cable, NEMA 4
833-3906 Display, 2 line X 16 characters, LCD, with cable, NEMA 4
CB P/N CB120Z Wiring Bases
833-3731 Pigtail wires, 4 foot long, 4"W x 5"H
833-3730 Open base with terminal block. 4"W x 7"H
CB120Z Accessories
833-3156 Kit, remote mounting, CB120Z display, 4 ft. cable, provides NEMA 4 protection
833-3157 Kit, remote mounting, CB120Z display, 8 ft. cable, provides NEMA 4 protection
833-3539 Blank display module, included with chassis

750-271 9
SCANNER SELECTION
PRESSURE/TEMPERATURE SENSORS
CB P/N DESCRIPTION USE WITH
CHASSIS
817-2261
832-1170 Infrared 3’ Replacement photo detector 833-3728
817-2262
817-2263 UV 3’ UV 6’ 833-3726
817-2124
817-4063 Self-check UV Replacement UV tube 833-3727
CB P/N DESCRIPTION
817-4480 Pressure sensor 0-15 psi
817-4481 Pressure sensor 0-30 psi
817-4482 Pressure sensor 0-200 psi
817-4483 Pressure sensor 0-300 psi
817-4484 Temp. sensor 32-350 deg F, 2” long
817-4485 Temp. sensor 32-350 deg F, 4” long
817-4486 Temp. sensor 32-350 deg F, 8” long
817-4487 Temp. sensor 32-752 deg F, 2” long
817-4488 Temp. sensor 32-752 deg F, 4” long
817-4489 Temp. sensor 32-752 deg F, 8” long

10 750-271
WIRING BASE
833-3731
PRE-WIRED
4 FOOT
COLOR CODED
FRONT VIEW
(WITH OPTIONAL DISPLAY INSTALLED)
WIRING BASE
833-3730
OPEN BOTTOM
CABINET MOUNT
CHASSIS/AMPLIFIER
120 VAC, 50/60 Hz
833-3728
833-3729
833-3726
833-3727
PROGRAMMER MODULE
833-3901
833-3902
833-3903
833-3904
DISPLAY MODULE
833-3905 - VACUUM FLUORESCENT
833-3906 - LIQUID CRYSTAL
(WITH OPTIONAL PROGRAMMER AND DISPLAY INSTALLED)
SIDE VIEW