Roberts Gorden UHA[X][S] 45 Model, Relay Type, Relay Part Number, UHAXS 30, Spst, 90417600

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UHA LOW PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

9.3 Low Voltage Thermostat with Multiple Heaters 30 - 45

Model

Relay Type

Relay Part Number

Max. Number of Heaters

UHA[X][S] 30 - 45

SPST

90417600

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Contents UHA-Series Tubular Unit Heaters Low Profile Range Installation, Operation & Service ManualCombat Models UHAXS 30, 45, 60, 75, 100,Page TABLE OF CONTENTS 2008 Roberts-GordonLLCPrinted in U.S.A Page TABLE OF FIGURES Page SECTION 1: HEATER SAFETY 1.1 Manpower Requirements1.2 Safety Labels and Their Placement Figure 1: UHA 30 - 45 Label Placement For separated combustion units onlyFigure 2: UHA 60 - 75 Label Placement For separated combustion units onlyFigure 3: UHA 100 - 125 Label Placement For separated combustion units only2.2 Corrosive Chemicals SECTION 2: INSTALLER RESPONSIBILITY2.1 Wall Tag 2.3 National Standards and Applicable Codes3.5 Clearances to Combustibles 3.4 Minimum Required Installation Clearances3.2 Manufactured Units 3.6 Ventilation3.7 Gas Supply 3.8 Electrical Supply3.9 Vent 4.3 Parking Structures and Repair Garages 4.1 Gas Codes4.2 Aircraft Hangars 4.4 Electrical4.6 High Altitude 5.3 Wall Mounting SECTION 5: MAJOR COMPONENTS 5.1 General5.2 Shelf Mounting and Suspension Crush Hazard Use 3/8 threaded rod minimumFigure 5: Suspension Methods Figure 6: Shelf-MountingMethodsExisting cabinet screws must be re-used Wall Shelf Mounting Bracket Kit DescriptionPart Number Descriptionlouver and compress Figure 8: Vertical Louvers OptionalPush in spring to remove6.1 Changing Vent and Air Intake Orientation 6.3 Vent InstallationSECTION 6 VENTING 6.2 Venting6.3.1Standard Vented Heaters Models UHAX 30 - 6.4 Unvented Operation6.5 Horizontal Venting 6.7.1 Maximum Vent Lengths 6.6 Vertical Venting6.7 Length Requirements 6.8 Vent MaterialHorizontal Figure 9: Vent and Roof DetailVertical OptionPage Horizontal Figure 13: Concentric Vent BoxVertical Option OptionVent Terminal SECTION 7 AIR SUPPLY 7.1 Separated Combustion Installation7.2 Unvented Installation 7.3 Building VentilationSECTION 8: GAS PIPING 8.1 ConnectionsFigure 15: Gas Connection 9.1.1 Fan Control SECTION 9: WIRING9.1 Positioning Thermostats 9.2 Low Voltage Thermostat with One HeaterRelay Part Number ModelRelay Type UHAXS 30 -90436300 UHAXS 60 -DPST Max. Number of Heaters9.5 Internal Wiring Diagram 9.6 Ladder Wiring Diagram 9.7 Electrical Connection to the Heater 10.1.1 Louvers SECTION 10: OPERATION AND MAINTENANCE10.1 Pre-Start-UpChecks 10.1.2 Electrical ChecksRequired Incoming Signals Figure 16: Automatic Burner Control SequenceFigure 17: Gas Valve for Models UHAXS 30 - Signals Output By ControlCheck Gas Rate 10.2.3 Pressure SwitchFigure 18: Gas Valve for Models UHAXS 60 - 10.2.4 Turning Off the Heater10.2.5 External Controls 10.3 Complete Start-Up10.3.1 Instruction to the User SECTION 11: USER INSTRUCTIONS Reset Limit Switch - See Page 33, SectionFigure 19: Manual Reset Limit Switch 11.1 User InstructionsFigure 20: LED Diagnostic Codes 11.5 Simple Troubleshooting11.5.1 Simple Troubleshooting Burner Faults 11.4.2 To Turn the Heater Off12.4 Heat Exchanger Maintenance 12.2 Burner Maintenance12.3 Fan/Motor Assembly Maintenance 12.5 Gas Valve MaintenanceThe Vicinity of the Heater 12.8 Maintenance Checklist12.7 Venting and Air Intake Pipe See Page 6, SectionPipe when installedCombustion Air Intake Heat ExchangerSECTION 13: TROUBLESHOOTING 13.1 General STARTSECTION 13: TROUBLESHOOTING 13.3 Troubleshooting for Flame Supervision System Correct power 13.4Troubleshooting for Gas Valves13.5Troubleshooting for Flue Blower STARTSECTION 14 REPLACEMENT PARTS Burner Components14.1 Gas Valve 14.2 Burner Compartment 14.2.1 Burner Injectors14.3 Ignition Electrode and Flame Probe Install Vertical screws 14.4 Heat Exchanger14.5 Louver and Louver Springs Horizontal14.6 Flue Blower Vertical Installation 14.7 Pressure Switch 14.9 Axial Fan/Guard/Motor Assembly14.8 Ignition Control 14.10 Limit Switches 14.9.1 Fan Removal and Replacement14.9.2 To Replace the Fan Assembly 14.10.1 Removal and ReplacementSIDE VIEW SECTION 15: SPECIFICATIONS 15.1 Dimension DataTOP VIEW REAR VIEW15.2 General Technical Data Table All Models 15.3 Technical Data Table All ModelsROBERTS GORDON WILL NOT PAY FOR WARRANTY IS VOID IFROBERTS GORDON WILL PAY FOR Roberts-GordonPage Purchased From if different than installer OWNER WARRANTY REGISTRATION CARDAbout the Installer Type of Installation check onePage Page close to heater Installation ClearancesFire Hazard injury or property damage