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Roberts Gorden CTCU 11, CTCU 27, CTCU 15, CTCU 22, CTCU 7, CTCU 32 Ignition Electrode and Flame Probe

Models: CTCU 32 CTCU 7 CTCU 22 CTCU 11 CTCU 15 CTCU 27

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COMBAT® CTCU UNIT HEATERS INSTALLATION OPERATION AND SERVICE MANUAL

16.3 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 11, CTCU 27, CTCU 15, CTCU 22, CTCU 7, CTCU 32 service manual Ignition Electrode and Flame Probe

Contents

Combat Models CTCUCTCU If you smell gasPage Page Page TABLE OF FIGURES Page Product Approval 1 ofSECTION 1 HEATER SAFETY Figure 1 Front and Back Panel Label Placement1.1 Manpower Requirements 1.2 Safety Labels and Their PlacementPart Number Figure 2 Side Panel Label Placement3 of SECTION 2 INSTALLER RESPONSIBILITY 2.1 Clearances to Combustibles2.2 Corrosive Chemicals Product Damage Hazard3.1 Required Clearances to Combustibles SECTION 3 CLEARANCES TO COMBUSTIBLESFire Hazard 80 cm is necessary to service Heaters may be installed vented or unvented Disconnect electric before serviceDANGER SECTION 4 CRITCAL CONSIDERATIONS 4.1 VentilationSECTION 5 SPECIFICATIONS 5.1 CTCUA All Models Dimension Data - CTCUA All Models140 for 8 of5.2 General Technical Data Table All Models SECTION 6 HEATER INSTALLATION 6.1 General 6.2 Basic Information6.4 Handling 6.5Suspension and Shelf Mounting11 of Figure 4: Suspension MethodsExisting cabinet screws must be re-used Figure 5 Shelf Mounting and Hanging Suspension Figure 6 Vertical Louvres Optional7.4 Type B22 Appliance See Page 14, Figure 7 through Page 14, FigureCut/Pinch Hazard Edges are sharpFigure 7 Flue and Roof Detail 14 of15 of 8.1 Room Sealed Installation 8.2 Open Flued Installation8.2.1 Heaters Installed Within the Heated Space SECTION 8 AIR SUPPLYSECTION 9 GAS PIPE WORK 9.1 Connections18 of SECTION 10 WIRING AND ELECTRICAL INFORMATION 10.2 Remote Controls10.1 Electrical Supply 10.2.1 Burner Controls Thermostat10.3 CTCUA Wiring Diagram Models 20 ofSECTION 11 COMMISSIONING Gas Fired Heater11.1 Pre-CommissionChecks 11.1.1 LouvresFigure 11 Automatic Burner Control Box Sequence 11.4 Begin Commissioning11.4.1 Before Operating the Heater 11.5 Combustion Testing Figure 12 Gas Valve for Heater ModelsCheck Gas Rate 11.6 Turning Off the Heater11.8 Complete the Commissioning 11.9 Instruction to the Userheater before service before serviceduring installation SECTION 12 USER INSTRUCTIONS12.3.3 Burner Lockout Reset Button 12.5 Simple Fault Finding12.5.1 Simple Fault Finding Burner Faults 12.3.2 Limit ThermostatTurn off gas and electrical supply before service 13.2 Burner Maintenance13.3 Fan/Motor Assembly Maintenance 13.4 Heat Exchanger Maintenance13.5 Gas Control Valve Maintenance 13.7 Maintenance Checklist13.6 Flue Fan The Vicinity of the Heaterwhen installed Burner ObservationWindow Flue Blower Scroll, Wheel14.3 Gas Valves SECTION 14 CONVERSION BETWEEN GASES 14.1 General14.2 Burner Conversion SECTION 15 TROUBLESHOOTING Disconnect electric before serviceheater before service before service15.1 General 32 ofSECTION 15 TROUBLESHOOTING 33 of15.3 Troubleshooting for Flame Supervision System 15.4 Troubleshooting for Solenoid ValvesNOTE Minimum flame probe current 1 µA DC 34 of35 of 15.5 Troubleshooting for Main FanSECTION 15 TROUBLESHOOTING SECTION 16 REMOVAL AND REPLACEMENT PARTS Burner Components16.1 Gas Valve 16.1.1 Models16.2 Burner Compartment 16.2.1 Burner Injectors16.3 Ignition Electrode and Flame Probe 16.4 Flue Fan Vertical Installation Models 39 of16.5 Flue Fan Vertical Installation Models 40 of16.6 Pressure Switch Carbon Monoxide Hazard16.8 CTCUA Axial Fan/Guard/Motor Assembly 16.8.1 Fan Removal and Replacement16.8.2 To Replace the Fan Assembly 16.7 Ignition ControlPage 80 cm is necessary to service heater destratification fans are installedFire Hazard close to heater