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Roberts Gorden CTCU 7, CTCU 27, CTCU 15 Troubleshooting for Flame Supervision System, 34 of

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

15.3 Troubleshooting for Flame Supervision System

To measure flame current, connect a 0 - 50 µA DC meter in series with the flame probe. If the meter reads negative values, then reverse the test leads.

NOTE: Minimum flame probe current 1 µA DC.

15.4 Troubleshooting for Solenoid Valves

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Roberts Gorden CTCU 7, CTCU 27 Troubleshooting for Flame Supervision System, Troubleshooting for Solenoid Valves, 34 of

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 Placement3 of Figure 2 Side Panel Label PlacementPart Number SECTION 2 INSTALLER RESPONSIBILITY 2.1 Clearances to Combustibles2.2 Corrosive Chemicals Product Damage HazardFire Hazard SECTION 3 CLEARANCES TO COMBUSTIBLES3.1 Required Clearances to Combustibles 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 MountingExisting cabinet screws must be re-used Figure 4: Suspension Methods11 of 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 Louvres11.4.1 Before Operating the Heater 11.4 Begin CommissioningFigure 11 Automatic Burner Control Box Sequence 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, Wheel14.2 Burner Conversion SECTION 14 CONVERSION BETWEEN GASES 14.1 General14.3 Gas Valves 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 ofSECTION 15 TROUBLESHOOTING 15.5 Troubleshooting for Main Fan35 of 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