Roberts Gorden UHD[X][S][R] 75, UHD[X][S][R] 125 service manual

Contents Combat Page Roberts-Gordon LLC Page Table of Figures Page Heater Safety Manpower RequirementsNational Standards and Applicable Codes Installer ResponsibilityCorrosive Chemicals Wall TagManufactured Units Minimum Required Installation ClearancesCritical Considerations 3.1 Basic Information Clearances to CombustiblesGas Supply VentilationElectrical Supply VentNational Standards and Applicable Codes High Altitude Air Flow and Temperature Rise Ranges Duct Heater Installation 5.1 GeneralTemperature Rise and Pressure Drop Ranges Minimum Inlet Duct LengthShelf Mounting and Suspension Wall MountingShelf-Mounting Methods Changing Vent and Air Intake Orientation Vent InstallationVenting United States RequirementsUnvented Operation Standard Vented Heaters Models Uhdxr 75Separated Combustion Heaters Models Uhdxsr 75 Horizontal VentingMaximum Vent Lengths Vent MaterialReplacing an Existing Heater in a Venting System Vent and Roof Detail Standard Vented Heater Common Vertical Vent Termination Concentric Vent Box UHVK1 AIR Supply Separated Combustion InstallationUnvented Installation Building VentilationGAS Piping ConnectionsWiring Low Voltage Thermostat with One HeaterPositioning Thermostats Internal Wiring Diagram L2 L1Ladder Wiring Diagram Flue Blower Transformer GAS Valve Flame Sensor ElectrodeElectrical Connection to the Heater Pre-Start-Up Checks Operation and MaintenanceBegin Start-Up Before Operating the Heater Electrical ChecksEND View Turning Off the Heater Pressure SwitchCheck Gas Rate External ControlsHeater Operation User InstructionsUser Instructions Lighting Instructions 11.4.1 To Turn On HeaterSimple Troubleshooting Simple Troubleshooting Burner FaultsTo Turn Heater Off Servicing Vehicles and Other Maintenance ChecklistVicinity of the Heater ObjectsValves When installed DuctworkGas Line and Shut-off Burner ObservationTroubleshooting 13.1 General Troubleshooting For Automatic Ignition Burner Systems Conduct start-up procedure as shown on Page 23, SectionTroubleshooting for Flame Supervision System Troubleshooting for Gas Valves Troubleshooting for Flue BlowerReplacement Parts Burner ComponentsBurner Compartment Burner InjectorsIgnition Electrode and Flame Probe Flue Blower Vertical Installation Top, remove the blower and mounting plate as aboveLimit Switches Removal and Replacement Ignition ControlSpecifications 15.1 Dimension Data TOP ViewGeneral Technical Data Table Technical Data TablePage Roberts-Gordon Warranty is Void ifRoberts Gordon will not PAY for Limitations on Authority RepresentativesPage Owner Warranty Registration Card Page Page Clearances to Combustibles