Roberts Gorden 200, 350, 150, 400, 300, 175, 225 250 Ignition Control, Axial Fan/Guard/Motor Assembly

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COMBAT® UHA UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

14.7 Pressure Switch

Pull off 3 way connector. Spring open plastic clips of mounting cradle. Replace with correct type of pressure switch for model. The pressure switches are color coded for each pressure setting.

WARNING

Carbon Monoxide Hazard

Use correct pressure switch specified for each model.

Use of incorrect pressure switch or disabling pressure switch circuit could cause unsafe condition.

Failure to follow these instructions can result in death or serious injury.

Carry out a commission after working on or changing a pressure switch. See Page 19, Section 10.

 

UHA[S]

UHA[S]

UHA[S]

UHA[S]

UHA[S]

MODEL

150 - 175

200 - 225

250

300 - 350

400

 

 

 

 

 

 

Pressure Switch

 

 

 

 

 

Kit P/N

90439802

90439808

90439803

90439807

90439808

 

 

 

 

 

 

Color Code

yellow

orange

gray

brown

orange

 

 

 

 

 

 

Set Point in. w.c.

.32

.79

.41

.68

.79

 

 

 

 

 

 

Pressure Switch Snap

 

 

 

 

 

Ring P/N

90439850

90439850

90439850

90439850

90439850

 

 

 

 

 

 

14.8 Ignition Control

The control mounts to the electrical plate. Pull out ignition cable and wiring from board, noting their positions.

Release the four mounting standoffs.

Refit in reverse. Ensure correct location of ignition cable and all other wiring.

14.9 Axial Fan/Guard/Motor Assembly

The axial fan unit for the heater is supplied completely assembled and balanced

MODEL

UHA[S] 150 - 175

UHA[S] 200- 250

UHA[S] 300 - 400

 

 

 

 

Axial Fan Guard

91901105

91901104

91901105

 

 

 

 

Axial Fan Motor

90600106

90600107

90600106

 

 

 

 

Axial Fan Blade

90709005

90709006

90709005

 

 

 

 

36

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Contents Combat Page Roberts-Gordon LLC Page Table of Figures Page Heater Safety Manpower RequirementsCorrosive Chemicals Installer ResponsibilityWall Tag National Standards and Applicable CodesCritical Considerations 3.1 Basic Information Minimum Required Installation ClearancesSeparated Combustion Installation Clearances to CombustiblesInstallation Clearances and Clearances to Combustibles National Standards and Applicable Codes Major Components 5.1 General SuspensionUnited States Requirements Vent InstallationVenting 6.1 Venting Canadian RequirementsHorizontal Venting Separated Combustion Heaters Models Uhas 150Unvented Operation Vertical VentingVent Material Vent and Roof DetailStandard Vented Heater Common Vertical Vent Termination Concentric Vent Box Horizontal Building Ventilation Unvented InstallationAIR Supply Outside Combustion Air SupplyGAS Piping ConnectionsPositioning Thermostats WiringLow Voltage Thermostat with One Heater Fan ControlUhas Series Internal Wiring Diagram GAS ValveUhas Series Ladder Wiring Diagram Electrical Connection to the Heater Electrical Checks Operation and MaintenanceLouvers Mechanical ChecksAutomatic Burner Control Sequence Turning Off the Heater Pressure SwitchCheck Gas Rate Complete the Start-UpHeater Operation Simple TroubleshootingSimple Troubleshooting Burner Fault Lighting Instructions 11.3.1 To Turn On HeaterUser Instructions Heat Exchanger Maintenance Burner Maintenance12.3 Fan/Motor Assembly Maintenance Gas Valve MaintenanceVehicles and Other Maintenance ChecklistVicinity of the Heater ObjectsWindow When installedBurner Observation Flue Blower Scroll, WheelTroubleshooting 13.1 General Troubleshooting For Automatic Ignition Burner Systems Result in death or electrical shockTroubleshooting for Flame Supervision System Troubleshooting for Gas Valves Troubleshooting for Flue BlowerConduct start-up procedure as shown on Page 19, Section Replacement Parts Burner ComponentsBurner Compartment Burner InjectorsIgnition Electrode and Flame Probe Description Part NumberExchangerAssembly Louvers and Louver SpringUhas Axial Fan/Guard/Motor Assembly Ignition ControlFan Removal and Replacement To Replace the Fan AssemblyLimit Switches Removal and Replacement Specifications Standard Models 150 400 Uhas Series Dimension DataGeneral Technical Data Table All Models Technical Data Table All ModelsPage ROBERTS-GORDON will not PAY for Warranty is Void ifROBERTS-GORDON will PAY for Limitations on Authority RepresentativesPage Page Page Page Fire Hazard
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225 250, 175, 300, 400, 150 specifications

Roberts Gorden is a recognized leader in the field of heating solutions, particularly renowned for the development of its innovative radiant heating systems. The lineup of models including the Roberts Gorden 250, 300, 400, 150, and 225 features a blend of advanced technology, exceptional efficiency, and versatile applications that cater to various industrial and commercial needs.

At the core of Roberts Gorden products is their radiant heating technology. Unlike conventional heating systems that warm the air, radiant heaters emit infrared radiation, which directly heats objects and people within a space. This method not only provides a comfortable environment but also reduces energy consumption and minimizes the loss of heat, making it an environmentally friendly choice.

The Roberts Gorden 250 model is specifically designed for smaller spaces, offering compact efficiency without sacrificing power. It features an adjustable output, allowing for tailored heating based on specific requirements. The advanced burner technology ensures optimum combustion efficiency, translating to cost savings on fuel consumption.

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In the mid-range spectrum, the Roberts Gorden 150 and 225 models cater to businesses needing versatile heating solutions. Both models are designed with user-friendly interfaces and include safety features that comply with industry standards. Their lightweight design allows for easy installation and mobility, making them suitable for temporary or permanent heating applications.

Overall, Roberts Gorden's commitment to innovation and efficiency is evident across its product range. With a focus on sustainability and advanced heating technologies, the Roberts Gorden 250, 300, 400, 150, and 225 models provide reliable heating solutions that meet the diverse preferences of industrial and commercial users. These products are not just about warmth; they are about creating a comfortable and productive environment while minimizing energy costs and environmental impact.