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Roberts Gorden UHD[X][S][R] 75, UHD[X][S][R] 125 service manual Electrical Connection to the Heater

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

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UHD LOW PROFILE DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL

9.5 Electrical Connection to the Heater

Burner

Connect wires together with suitable approved wire connectors.

Green to Ground

White to L2

Black to L1

Flexible Conduit

BX Connector

	L1	Junction Box
	L2	Junction Box
	L2
	Ground

Black

White

Green

IMPORTANT: Junction box is not provided with heater.

Conduit can also be attached directly to heater with wire junction made within the heater cabinet.

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Roberts Gorden UHD[X][S][R] 75, UHD[X][S][R] 125 service manual Electrical Connection to the Heater

Contents

Combat UHD-Series Tubular Duct Furnace Low Profile RangeModels UHDXSR 75 Quality in Any LanguagePage 2008 Roberts-GordonLLC Page TABLE OF FIGURES Page SECTION 1 HEATER SAFETY 1.1 Manpower RequirementsSECTION 2 INSTALLER RESPONSIBILITY 2.2 Corrosive Chemicals2.3 National Standards and Applicable Codes 2.1 Wall Tag3.4 Minimum Required Installation Clearances 3.2 Manufactured Units3.5 Clearances to Combustibles Figure 1 Clearances to CombustiblesHeaters may be installed vented or unvented Gas can leak if not installed properly3.6 Ventilation Carbon Monoxide Hazard4.1 Gas Codes 4.2 Aircraft Hangars4.3 Parking Structures and Repair Garages 4.4 Electrical4.6 High Altitude SECTION 5 DUCT HEATER INSTALLATION 5.1 General 5.1.2 Temperature Rise and Pressure Drop Ranges5.1.3 Air Flow and Temperature Rise Ranges 5.1.1 Minimum Inlet Duct Length5.2 Shelf Mounting and Suspension Crush Hazard Use 3/8 threaded rod minimumFigure 3 Suspension Methods 5.3 Wall MountingFigure 5 Wall Shelf Mounting and Suspension Figure 4 Shelf-MountingMethodsExisting cabinet screws must be re-used 6.3 Vent Installation SECTION 6 VENTING6.1 Changing Vent and Air Intake Orientation 6.2 Venting6.3.1Standard Vented Heaters Models UHDXR 6.4 Unvented Operation6.5 Horizontal Venting 6.6 Vertical Venting6.7.1 Maximum Vent Lengths 6.8 Vent MaterialFigure 6 Vent and Roof Detail ModelUHDXR 90502102Page Figure 10 Concentric Vent Box Description Part NumberConcentric Vent Kit UHVK17.1 Separated Combustion Installation 7.2 Unvented InstallationSECTION 7 AIR SUPPLY 7.3 Building VentilationSECTION 8 GAS PIPING 8.1 ConnectionsFigure 12 Gas Connection Gas can leak if not installed properlySECTION 9 WIRING 9.2 Low Voltage Thermostat with One Heater9.1 Positioning Thermostats Electrical Shock Hazard9.3 Internal Wiring Diagram 9.4 Ladder Wiring Diagram 9.5 Electrical Connection to the Heater SECTION 10 OPERATION AND MAINTENANCE 10.2 Begin Start-Up10.2.1 Before Operating the Heater 10.1 Pre-Start-UpChecksFigure 13 Automatic Burner Control Sequence Figure 14 Gas ValveEND VIEW Required Incoming Signals10.2.3 Pressure Switch Check Gas Rate10.2.4 Turning Off the Heater 10.2.5 External ControlsReset Limit Switch - See Page 26, Section The fault must be traced and repairedFigure 15 Manual Reset Limit Switch SECTION 11 USER INSTRUCTIONS11.5 Simple Troubleshooting 11.5.1 Simple Troubleshooting Burner FaultsFigure 16 LED Diagnostic Codes 11.4.2 To Turn Heater Off12.2 Burner Maintenance 12.3 Heat Exchanger Maintenance12.4 Gas Valve Maintenance SECTION 12 SERVICING12.7 Maintenance Checklist The Vicinity of the HeaterSee Page 3, Section Vehicles and Otherwhen installed Gas Line and Shut-offValves Burner ObservationSECTION 13 TROUBLESHOOTING 13.1 General STARTTROUBLESHOOT ENDS. No 13.3 Troubleshooting for Flame Supervision System 13.4 Troubleshooting for Gas Valves 13.5 Troubleshooting for Flue BlowerSTART STARTBurner Components SECTION 14 REPLACEMENT PARTS14.1 Gas Valve 14.2 Burner Compartment 14.2.1 Burner InjectorsEnsure gas tight fitting of injectors Ensure correct alignment with burners14.3 Ignition Electrode and Flame Probe 14.4 Heat Exchanger14.5 Flue Blower Vertical Installation 14.6 Pressure Switch 14.8 Limit Switches14.8.1 Removal and Replacement 14.7 Ignition ControlSECTION 15 SPECIFICATIONS 15.1 Dimension Data Model15.2 General Technical Data Table 15.3 Technical Data TablePage WARRANTY IS VOID IF ROBERTS GORDON WILL PAY FORROBERTS GORDON WILL NOT PAY FOR Roberts-GordonPage Mail or Fax to OWNER WARRANTY REGISTRATION CARDAbout the Installer Purchased From if different than installerPage Page Fire Hazard