User ManualTable of ContentsSECTION 1: Heater Safety1SECTION 10: Operation and Maintenance211.1 Manpower Requirements110.1 Pre-Start-Up Checks21SECTION 2: Installer Responsibility210.2 Begin Start-Up212.1 Wall Tag210.3 Complete Start-Up232.2 Corrosive Chemicals2SECTION 11: User Instructions242.3 National Standards and Applicable Codes211.1 User Instructions24SECTION 3: Critical Considerations311.2 Heater Operation243.1 Basic Information311.3 Lighting Instructions243.2 Manufactured Units311.4 Simple Troubleshooting243.3 Location and Suspension3SECTION 12: Servicing253.4 Minimum Required Installation Clearances312.1 Servicing Instructions253.5 Clearances to Combustibles312.2 Burner Maintenance253.6 Ventilation412.3 Heat Exchanger Maintenance253.7 Gas Supply412.4 Gas Valve Maintenance253.8 Electrical Supply412.5 Flue Blower253.9 Vent412.6 Venting and Air Intake Pipe25SECTION 4: National Standards and Applicable Codes512.7 Maintenance Checklist264.1 Gas Codes5SECTION 13: Troubleshooting284.2 Aircraft Hangars513.1 General284.3 Parking Structures and Repair Garages54.4 Electrical5Systems294.5 Venting513.3 Troubleshooting for Flame Supervision System304.6 High Altitude613.4 Troubleshooting for Gas Valves31SECTION 5: Duct Heater Installation713.5 Troubleshooting for Flue Blower315.1 General7SECTION 14: Replacement Parts325.2 Suspension814.1 Gas Valve32SECTION 6: Venting914.2 Burner Compartment336.1 Changing Vent and Air Intake Orientation914.3 Ignition Electrode and Flame Probe346.2 Venting914.4 Heat Exchanger356.3 Vent Installation914.5 Flue Blower356.4 Unvented Operation1014.6 Pressure Switch366.5 Horizontal Venting1014.7 Ignition Control366.6 Vertical Venting1014.8 Limit Switches366.7 Length Requirements10SECTION 15: Specifications376.8 Vent Material1115.1 Dimension Data3715.2 General Technical Data Table38SECTION 7: Air Supply1515.3 Technical Data Table387.1 Separated Combustion Installation157.2 Unvented Installation15UHD-Series Warranty397.3 Building Ventilation157.4 Outside Combustion Air Supply15SECTION 8: Gas Piping168.1 Connections16SECTION 9: Wiring179.1 Positioning Thermostats179.2 Low Voltage Thermostat with One Heater179.3 Internal Wiring Diagram189.4 Ladder Wiring Diagram199.5 Electrical Connection to the Heater20Figure 1: Clearances to Combustibles3Figure 2: Air Flow Direction7Figure 3: Suspension Methods8Figure 4: Vent and Roof Detail11Vent Termination12Termination12Horizontal Vent Termination13Figure 8: Concentric Vent Box13Separated Combustion Heater14Figure 10: Gas Connection16Figure 11: Automatic Burner Control Sequence22Figure 12: Gas Valve22Figure 13: LED Diagnostic Codes24Size: 2.87 MBPages: 50Language: EnglishOpen manual