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Roberts Gorden CTCU 22, CTCU 27, CTCU 15, CTCU 11, CTCU 7 Ignition Electrode and Flame Probe

Models: CTCU 7 CTCU 22 CTCU 11 CTCU 15 CTCU CTCU 27

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COMBAT® CTCU UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

15.3 Ignition Electrode and Flame Probe

Limit	Flame
Thermostat	Probe
Fan
Thermostat

Ignition

Electrode

Burners

Flame

Probe

Ignition

Electrode

.120

(3 mm)

spark gap

Burners

Burner Compartment

Front Views

To replace the ignition electrode or flame probe, remove the electrical lead and screw. Pull out from mounting. Refit in reverse ensuring that the gap to burner is as shown in the front view of the burner compartment.

Description	Part Number
Spark Electrode	90427411
Automatic Ignition Flame Probe	90439300
Burners	92000002
Fan Thermostat	90412102
Limit Thermostat	90412100

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Roberts Gorden CTCU 22, CTCU 27, CTCU 15, CTCU 11, CTCU 7 service manual Ignition Electrode and Flame Probe

Contents

DO NOT use electrical switches Installation, CommissioningFOR YOUR SAFETY when placed close to heaterPage TABLE OF CONTENTS 2006 Roberts-Gordon,LLCPage TABLE OF FIGURES Page Product Approval 2.1 Clearances to Combustibles SECTION 1 HEATER SAFETYSECTION 2 INSTALLER RESPONSIBILITY 2.2 Corrosive Chemicals3.4 Clearances to Combustibles 3.3 Minimum Required Installation Clearances3.8 Flue 3.5 Ventilationfans are installed Dimension Data - CTCUA All Models SECTION 4 SPECIFICATIONS 4.1 CTCUA All Models140 for 4.2 General Technical Data Table All Models Figure 2 Suspension Methods SECTION 5 HEATER INSTALLATION 5.1 General5.2 Shelf Mounting and Suspension 5.3 Wall MountingFigure 3 Shelf Mounting and Hanging Suspension Figure 4 Vertical Louvres Optional6.1 Changing Flue and Air Intake Orientation SECTION 6 FLUE INSTALLATION6.2 Flue Installation 6.4 Type B22 ApplianceHorizontal VerticalOption Option7.2.1 Heaters Installed Within the Heated Space 7.1 Room Sealed Installation7.2 Open Flued Installation SECTION 7 AIR SUPPLYSECTION 8 GAS PIPING 8.1 Connections9.1 Electrical Supply SECTION 9 WIRING AND ELECTRICAL INFORMATION9.2 Remote Controls 9.2.1 Burner Controls Thermostat9.3 CTCUA Wiring Diagram Models 7 - SITE WIRING10.1.1 Louvres SECTION 10 COMMISSIONING10.1 Pre-CommissionChecks 10.1.3 Gas SupplyFigure 10 Gas Valve for Heater Models Figure 9 Automatic Burner Control Box SequenceEnd View Check Gas Rate 10.2.3 Combustion Testing10.2.4 Pressure Switch 10.2.5 Turning Off the Heater11.2 Heater Operation Limit Thermostat Reset See Page 18, Section11.3.3 Burner Lockout Reset Button Figure 11 Heater Operating Sequence11.4.2 To Turn the Heater Off 11.5 Simple Fault Finding11.5.1 Simple Fault Finding Burner Faults See Page 5, Section12.4 Heat Exchanger Maintenance 12.2 Burner Maintenance12.3 Fan/Motor Assembly Maintenance 12.5 Gas Control Valve Maintenance13.2 Burner Conversion SECTION 13 CONVERSION BETWEEN GASES 13.1 General13.3 Gas Valves Explosion Hazard SECTION 14 TROUBLESHOOTING 14.1 GeneralStart Voltage from ignition components is high StartTROUBLESHOOT ENDS. No 14.3 Troubleshooting for Flame Supervision System START 14.4 Troubleshooting for Solenoid Valves14.5 Troubleshooting for Main Fan STARTBurner Components SECTION 15 REMOVAL AND REPLACEMENT PARTSGAS VALVE IS USED WHEN REPLACING THESE CONTROLS 15.1 Gas Valve15.2 Burner Compartment 15.2.1 Burner Injectors15.3 Ignition Electrode and Flame Probe 15.4 Flue Fan Vertical Installation 15.5 Pressure Switch 15.7.2 To Replace the Fan Assembly 15.7 CTCUA Axial Fan/Guard/Motor Assembly15.7.1 Fan Removal and Replacement 15.6 Ignition ControlPage Page close to heater Fire Hazardinjury or property damage