Roberts Gorden UHA[X][S] 30, UHA[X][S] 45, UHA[X][S] 125 Burner Compartment, Burner Injectors

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14.2 Burner Compartment

SECTION 14: REPLACEMENT PARTS

14.2 Burner Compartment

Burner

Compartment

Cover

Viewing port for flame probe

Flame Probe

Ignition Electrode

The burner compartment is a sealed compartment. Following any work, re-seal the compartment with the gas pipe rubber seal fully in place and all screws fitted and tight.

	Remove flexible	.
	air duct from spigot	.
	air duct from spigot	NOTE: Separated combustion
		NOTE: Separated combustion
		model shown.
	Remove screws and
	pull off burner cover

14.2.1 Burner Injectors

Inshot

Burners

Orifices

Manifold

Mounting

Bracket Grommet

Manifold

Remove manifold

screws and pull

out manifold

Manifold

Unscrew

Orifices

Marking

Folded

Hem

Ensure gas tight fitting of injectors.

Ensure correct alignment with burners.

Ensure all pipe joints are gas tight.

MODEL	UHA[X][S] 30	UHA[X][S] 45	UHA[X][S] 60	UHA[X][S] 75	UHA[X][S] 100	UHA[X][S] 125

Orifice Quantity	2	3	4	5	6	7

Natural Gas (G20)

Orifice Marking	49	49	49	49	46	46

P/N	91930049	91930049	91930049	91930049	91930046	91930046

Propane (G31)

Orifice Marking	56	56	56	1.15 mm	1.25 mm	1.25 mm

P/N	91930056	91930056	91930056	91930115	91930125	91930125

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Contents Combat Installation, Operation & Service ManualUHA-Series Tubular Unit Heaters Low Profile Range Models UHAXS 30, 45, 60, 75, 100,Page 2008 Roberts-GordonLLC TABLE OF CONTENTSPrinted in U.S.A Page TABLE OF FIGURES Page 1.1 Manpower Requirements SECTION 1: HEATER SAFETY1.2 Safety Labels and Their Placement For separated combustion units only Figure 1: UHA 30 - 45 Label PlacementFor separated combustion units only Figure 2: UHA 60 - 75 Label PlacementFor separated combustion units only Figure 3: UHA 100 - 125 Label Placement2.1 Wall Tag SECTION 2: INSTALLER RESPONSIBILITY2.2 Corrosive Chemicals 2.3 National Standards and Applicable Codes3.2 Manufactured Units 3.4 Minimum Required Installation Clearances3.5 Clearances to Combustibles 3.6 Ventilation3.8 Electrical Supply 3.7 Gas Supply3.9 Vent 4.2 Aircraft Hangars 4.1 Gas Codes4.3 Parking Structures and Repair Garages 4.4 Electrical4.6 High Altitude 5.2 Shelf Mounting and Suspension SECTION 5: MAJOR COMPONENTS 5.1 General5.3 Wall Mounting Crush Hazard Use 3/8 threaded rod minimumFigure 6: Shelf-MountingMethods Figure 5: Suspension MethodsExisting cabinet screws must be re-used Part Number DescriptionWall Shelf Mounting Bracket Kit DescriptionPush in Figure 8: Vertical Louvers Optionallouver and compress spring to removeSECTION 6 VENTING 6.3 Vent Installation6.1 Changing Vent and Air Intake Orientation 6.2 Venting6.4 Unvented Operation 6.3.1Standard Vented Heaters Models UHAX 30 -6.5 Horizontal Venting 6.7 Length Requirements 6.6 Vertical Venting6.7.1 Maximum Vent Lengths 6.8 Vent MaterialVertical Figure 9: Vent and Roof DetailHorizontal OptionPage Vertical Option Figure 13: Concentric Vent BoxHorizontal OptionVent Terminal 7.2 Unvented Installation 7.1 Separated Combustion InstallationSECTION 7 AIR SUPPLY 7.3 Building Ventilation8.1 Connections SECTION 8: GAS PIPINGFigure 15: Gas Connection 9.1 Positioning Thermostats SECTION 9: WIRING9.1.1 Fan Control 9.2 Low Voltage Thermostat with One HeaterRelay Type ModelRelay Part Number UHAXS 30 -DPST UHAXS 60 -90436300 Max. Number of Heaters9.5 Internal Wiring Diagram 9.6 Ladder Wiring Diagram 9.7 Electrical Connection to the Heater 10.1 Pre-Start-UpChecks SECTION 10: OPERATION AND MAINTENANCE10.1.1 Louvers 10.1.2 Electrical ChecksFigure 17: Gas Valve for Models UHAXS 30 - Figure 16: Automatic Burner Control SequenceRequired Incoming Signals Signals Output By ControlFigure 18: Gas Valve for Models UHAXS 60 - 10.2.3 Pressure SwitchCheck Gas Rate 10.2.4 Turning Off the Heater10.3 Complete Start-Up 10.2.5 External Controls10.3.1 Instruction to the User Figure 19: Manual Reset Limit Switch Reset Limit Switch - See Page 33, SectionSECTION 11: USER INSTRUCTIONS 11.1 User Instructions11.5.1 Simple Troubleshooting Burner Faults 11.5 Simple TroubleshootingFigure 20: LED Diagnostic Codes 11.4.2 To Turn the Heater Off12.3 Fan/Motor Assembly Maintenance 12.2 Burner Maintenance12.4 Heat Exchanger Maintenance 12.5 Gas Valve Maintenance12.7 Venting and Air Intake Pipe 12.8 Maintenance ChecklistThe Vicinity of the Heater See Page 6, SectionCombustion Air Intake when installedPipe Heat ExchangerSTART SECTION 13: TROUBLESHOOTING 13.1 GeneralSECTION 13: TROUBLESHOOTING 13.3 Troubleshooting for Flame Supervision System 13.5Troubleshooting for Flue Blower 13.4Troubleshooting for Gas ValvesCorrect power STARTBurner Components SECTION 14 REPLACEMENT PARTS14.1 Gas Valve 14.2.1 Burner Injectors 14.2 Burner Compartment14.3 Ignition Electrode and Flame Probe 14.5 Louver and Louver Springs 14.4 Heat ExchangerInstall Vertical screws Horizontal14.6 Flue Blower Vertical Installation 14.9 Axial Fan/Guard/Motor Assembly 14.7 Pressure Switch14.8 Ignition Control 14.9.2 To Replace the Fan Assembly 14.9.1 Fan Removal and Replacement14.10 Limit Switches 14.10.1 Removal and ReplacementTOP VIEW SECTION 15: SPECIFICATIONS 15.1 Dimension DataSIDE VIEW REAR VIEW15.3 Technical Data Table All Models 15.2 General Technical Data Table All ModelsROBERTS GORDON WILL PAY FOR WARRANTY IS VOID IFROBERTS GORDON WILL NOT PAY FOR Roberts-GordonPage About the Installer OWNER WARRANTY REGISTRATION CARDPurchased From if different than installer Type of Installation check onePage Page Fire Hazard Installation Clearancesclose to heater injury or property damage