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Roberts Gorden UHD[X][S][R] 250 service manual Combat, Installation, Operation & Service Manual

Models: UHD[X][S][R] 175 UHD[X][S][R] 150 UHD[X][S][R] 200 UHD[X][S][R] 225 UHD[X][S][R] 350 UHD[X][S][R] 400 UHD[X][S][R] 250 UHD[X][S][R] 300

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Quality in Any Language™

WARNING

Improper installation, adjustment, alteration, service or maintenance can result in death, injury or property damage. Read the Installation, Operation and Service Manual thoroughly before installing or servicing this equipment.

Installation must be done by a contractor qualified in the installation and service of gas-fired heating equipment or your gas supplier.

Quality in Any Language™

© 2008 Roberts-Gordon LLC

Combat®

UHD-Series

Tubular Duct Furnace

(Standard Range)

Installation, Operation

& Service Manual

Models UHD[X][S][R] 150, 175, 200, 225 250, 300, 350, 400

Installer

Please take the time to read and understand these instructions prior to any installation.

Installer must give a copy of this manual to the owner.

Owner

Keep this manual in a safe place in order to provide

your serviceman with necessary information.

Roberts-Gordon LLC

1250 William Street

P.O. Box 44

Buffalo, New York 14240-0044

Telephone: 716.852.4400

Fax: 716.852.0854

Toll Free: 800.828.7450

www.rg-inc.com

P/N 113001NA 11/08 Orig.

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Roberts Gorden UHD[X][S][R] 250, UHD[X][S][R] 300 service manual Combat, UHD-Series Tubular Duct Furnace Standard Range

Contents

Combat Installation, Operation & Service ManualUHD-Series Tubular Duct Furnace Standard Range Models UHDXSR 150, 175, 200, 225 250, 300, 350,Page 2008 Roberts-GordonLLC TABLE OF CONTENTSPrinted in U.S.A Page TABLE OF FIGURES Page 1.1 Manpower Requirements SECTION 1: HEATER SAFETY2.2 Corrosive Chemicals SECTION 2 INSTALLER RESPONSIBILITY2.3 National Standards and Applicable Codes 2.1 Wall Tagaccess to all serviceable components • Must be installed in a manner which allows3.4 Minimum Required Installation Clearances 3.2 Manufactured Units3.7 Gas Supply 3.6 Ventilation3.8 Electrical Supply 3.9 Vent4.2 Aircraft Hangars 4.1 Gas Codes4.3 Parking Structures and Repair Garages 4.4 Electrical4.6 High Altitude 5.1.1 Minimum Inlet Duct Length SECTION 5 DUCT HEATER INSTALLATION 5.1 GeneralFigure 2 Air Flow Direction 5.1.2 Temperature Rise and Pressure Drop Ranges5.2 Suspension 5.1.3 Air Flow And Temperature Rise RangesFigure 3: Suspension Methods Crush Hazard Use 3/8 threaded rod minimumSECTION 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 UHDXR 150 -6.5 Horizontal Venting 6.6 Vertical Venting6.8 Vent Material 6.7.1 Maximum Vent LengthsFigure 4: Vent and Roof Detail UHDXR 150 - Model90502102 Vent DiameterVertical Option Figure 8 Concentric Vent BoxHorizontal Option Description 7.2 Unvented Installation 7.1 Separated Combustion InstallationSECTION 7: AIR SUPPLY 7.3 Building Ventilation8.1 Connections SECTION 8 GAS PIPINGFigure 10 Gas Connection 9.1 Positioning Thermostats SECTION 9 WIRING9.2 Low Voltage Thermostat with One Heater 9.3 Internal Wiring Diagram 120 VAC FLUE BLOWER TRANSFORMER GAS VALVE 9.4 Ladder Wiring DiagramFLAME SENSOR ELECTRODE 9.5 Electrical Connection to the Heater 10.1 Pre-Start-UpChecks SECTION 10: OPERATION AND MAINTENANCE10.1.1 Electrical Checks 10.1.2 Gas SupplyFigure 12: Gas Valve Figure 11: Automatic Burner Control SequenceEND VIEW TOP VIEWCheck Gas Rate 10.2.3 Pressure Switch10.2.4 Turning Off the Heater 10.2.5 External Controls11.4.1 Simple Troubleshooting Burner Faults 11.4 Simple TroubleshootingFigure 13 LED Diagnostic Codes SECTION 11 USER INSTRUCTIONS12.3 Heat Exchanger Maintenance 12.2 Burner Maintenance12.4 Gas Valve Maintenance SECTION 12: SERVICINGThe Vicinity of the Heater 12.7 Maintenance ChecklistSee Page 3, Section Vehicles and OtherGas Line and Shut-off when installedValves Burner ObservationSTART SECTION 13 TROUBLESHOOTING 13.1GeneralTROUBLESHOOT ENDS. No 13.3 Troubleshooting for Flame Supervision System 13.5 Troubleshooting for Flue Blower 13.4Troubleshooting for Gas ValvesSTART STARTBurner Components SECTION 14: REPLACEMENT PARTS14.1 Gas Valve Remove the gas supply pipe at the heater inlet14.2.1 Burner Injectors 14.2 Burner CompartmentNOTE: Separated combustion Ensure gas tight fitting of injectors14.3 Ignition Electrode and Flame Probe 14.5 Flue Blower 14.4 Heat Exchanger14.8 Limit Switches 14.6 Pressure Switch14.8.1 Removal and Replacement 14.7 Ignition ControlSECTION 15 SPECIFICATIONS 15.1 Dimension Data 15.3 Technical Data Table 15.2 General Technical Data TableROBERTS GORDON WILL PAY FOR WARRANTY IS VOID IFROBERTS GORDON WILL NOT PAY FOR U.S.APage About the Installer OWNER WARRANTY REGISTRATION CARDPurchased From if different than installer Type of Installation check onePage Page Fire Hazard