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Roberts Gorden UHD[X][S][R] 125 service manual Ignition Electrode and Flame Probe, Heat Exchanger

Models: UHD[X][S][R] 125 UHD[X][S][R] 75

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14.3 Ignition Electrode and Flame Probe

SECTION 14: REPLACEMENT PARTS

14.3 Ignition Electrode and Flame Probe

		Inshot
		Burners
Manual Reset
Limit Switch
(Position may vary.)
		Flame
	Flame	Probe
	Flame
	Probe
Limit
Switch
		Burner Compartment
Ignition		Front Views
Electrode
		Ignition
		Electrode

.120 (3 mm) spark

gap

Inshot

Burners

To replace the 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	Qty
Spark Electrode	90427411	1
Automatic Ignition Flame Probe	90439300	1
Transformer	90436900K	1
Ignition Module	90434008	1
Inshot Burners UHD[X][S][R] 75	92000002	5
Inshot Burners UHD[X][S][R] 100	92000002	6
Inshot Burners UHD[X][S][R] 125	92000002	7
Limit Switch	90412104	1
Manual Reset Limit Switch (75 only)	90412106	1

14.4 Heat Exchanger

The heat exchanger consists of a six-pass design with 1.5" outer diameter [aluminized steel] [409 stainless steel] tube. The tube plates are made of [aluminized steel] [409 stainless steel]. The tube supports are made of [galvannealed steel] [409 stainless steel].

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Roberts Gorden UHD[X][S][R] 125, UHD[X][S][R] 75 service manual Ignition Electrode and Flame Probe, Heat Exchanger

Contents

Quality in Any Language CombatUHD-Series Tubular Duct Furnace Low Profile Range Models UHDXSR 75Page 2008 Roberts-GordonLLC Page TABLE OF FIGURES Page 1.1 Manpower Requirements SECTION 1 HEATER SAFETY2.1 Wall Tag SECTION 2 INSTALLER RESPONSIBILITY2.2 Corrosive Chemicals 2.3 National Standards and Applicable CodesFigure 1 Clearances to Combustibles 3.4 Minimum Required Installation Clearances3.2 Manufactured Units 3.5 Clearances to CombustiblesCarbon Monoxide Hazard Heaters may be installed vented or unventedGas can leak if not installed properly 3.6 Ventilation4.4 Electrical 4.1 Gas Codes4.2 Aircraft Hangars 4.3 Parking Structures and Repair Garages4.6 High Altitude 5.1.1 Minimum Inlet Duct Length SECTION 5 DUCT HEATER INSTALLATION 5.1 General5.1.2 Temperature Rise and Pressure Drop Ranges 5.1.3 Air Flow and Temperature Rise Ranges5.3 Wall Mounting 5.2 Shelf Mounting and SuspensionCrush Hazard Use 3/8 threaded rod minimum Figure 3 Suspension MethodsFigure 5 Wall Shelf Mounting and Suspension Figure 4 Shelf-MountingMethodsExisting cabinet screws must be re-used 6.2 Venting 6.3 Vent InstallationSECTION 6 VENTING 6.1 Changing Vent and Air Intake Orientation6.6 Vertical Venting 6.3.1Standard Vented Heaters Models UHDXR6.4 Unvented Operation 6.5 Horizontal Venting6.8 Vent Material 6.7.1 Maximum Vent Lengths90502102 Figure 6 Vent and Roof DetailModel UHDXRPage Figure 10 Concentric Vent Box UHVK1 DescriptionPart Number Concentric Vent Kit7.3 Building Ventilation 7.1 Separated Combustion Installation7.2 Unvented Installation SECTION 7 AIR SUPPLYGas can leak if not installed properly SECTION 8 GAS PIPING8.1 Connections Figure 12 Gas ConnectionElectrical Shock Hazard SECTION 9 WIRING9.2 Low Voltage Thermostat with One Heater 9.1 Positioning Thermostats9.3 Internal Wiring Diagram 9.4 Ladder Wiring Diagram 9.5 Electrical Connection to the Heater 10.1 Pre-Start-UpChecks SECTION 10 OPERATION AND MAINTENANCE10.2 Begin Start-Up 10.2.1 Before Operating the HeaterRequired Incoming Signals Figure 13 Automatic Burner Control SequenceFigure 14 Gas Valve END VIEW10.2.5 External Controls 10.2.3 Pressure SwitchCheck Gas Rate 10.2.4 Turning Off the HeaterSECTION 11 USER INSTRUCTIONS Reset Limit Switch - See Page 26, SectionThe fault must be traced and repaired Figure 15 Manual Reset Limit Switch11.4.2 To Turn Heater Off 11.5 Simple Troubleshooting11.5.1 Simple Troubleshooting Burner Faults Figure 16 LED Diagnostic CodesSECTION 12 SERVICING 12.2 Burner Maintenance12.3 Heat Exchanger Maintenance 12.4 Gas Valve MaintenanceVehicles and Other 12.7 Maintenance ChecklistThe Vicinity of the Heater See Page 3, SectionBurner Observation when installedGas Line and Shut-off ValvesSTART SECTION 13 TROUBLESHOOTING 13.1 GeneralTROUBLESHOOT ENDS. No 13.3 Troubleshooting for Flame Supervision System START 13.4 Troubleshooting for Gas Valves13.5 Troubleshooting for Flue Blower STARTBurner Components SECTION 14 REPLACEMENT PARTS14.1 Gas Valve Ensure correct alignment with burners 14.2 Burner Compartment14.2.1 Burner Injectors Ensure gas tight fitting of injectors14.4 Heat Exchanger 14.3 Ignition Electrode and Flame Probe14.5 Flue Blower Vertical Installation 14.7 Ignition Control 14.6 Pressure Switch14.8 Limit Switches 14.8.1 Removal and ReplacementModel SECTION 15 SPECIFICATIONS 15.1 Dimension Data15.3 Technical Data Table 15.2 General Technical Data TablePage Roberts-Gordon WARRANTY IS VOID IFROBERTS GORDON WILL PAY FOR ROBERTS GORDON WILL NOT PAY FORPage Purchased From if different than installer Mail or Fax toOWNER WARRANTY REGISTRATION CARD About the InstallerPage Page Fire Hazard