Roberts Gorden 60, 75, 100, 125, 45, 30 service manual Wiring, Positioning Thermostats, Fan Control

Page 29

SECTION 9: WIRING

SECTION 9: WIRING

WARNING

Electrical Shock Hazard

Disconnect electrical and gas supply before servicing.

This appliance must be connected to a properly grounded electrical source.

Failure to follow these instructions can result in death or electrical shock.

codes in accordance with: United States: refer to National Electrical Code® NFPA 70 - latest revision; Canada: refer to Canadian Electrical Code CSA C22.1 Part I - latest revision.

9.1 Positioning Thermostats

A room thermostat should be mounted on a vibration-free wall or column at a height of approximately 5' (1.5 m) from the floor to measure the ambient temperature. It should be clear of both cold drafts and the direct path of warm air from the heater.

Avoid mounting thermostat on outside walls or in areas directly exposed to radiant heat or sunlight. Install wall tag in a visible location near thermostat See Page 5, Section 2.1 for wall tag details.

9.1.1 Fan Control

All heater models require constant 120 V/1Ø/ 60 Hz power supply. Check heater rating plate for electrical rating for proper circuit sizing. For servicing, a disconnect switch of proper electrical rating should be installed in the vicinity of the heater.

All heaters are equipped with thermostat connections suitable to power a 24 V thermostat. Heater must be wired and electrically grounded in accordance with local codes. In the absence of local

The heater’s axial fan can be used during the off- season for air circulation. A low-voltage programmable thermostat with a fan switch (P/N 90425400) must be See Page 23, Section 9.2. used. For thermostat connection details. For the use of multiple heaters on one thermostat, See Page 24, Section 9.3 through Page 25, Section 9.4

9.2 Low Voltage Thermostat with One Heater

24 Volt

Thermostat

Heating

Only

Terminal

Strip

R

Gas G

W

Supply C

Electrical

Supply

R

W

24Volt Thermostat with Fan Control

Terminal

StripR

G

R

Gas G W

W

Supply C

C

Electrical

Supply

23

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Contents Blackheat Page Roberts-Gordon LLC Page Table of Figures Page Safety Labels and Their Placement Heater SafetyManpower Requirements UHA 30 45 Label Placement UHA 60 75 Label Placement UHA 100 125 Label Placement Wall Tag Installer ResponsibilityCorrosive Chemicals National Standards and Applicable CodesCritical Considerations 3.1 Basic Information Minimum Required Installation ClearancesManufactured Units Clearances to CombustiblesVent Gas SupplyElectrical Supply National Standards and Applicable Codes High Altitude Wall Mounting Major Components 5.1 GeneralShelf Mounting and Suspension Suspension Methods Wall Shelf Mounting and Hanging Suspension Vertical Louvers Optional Venting Vent InstallationChanging Vent and Air Intake Orientation United States RequirementsSeparated Combustion Heaters Models Uhaxs 30 Standard Vented Heaters Models Uhax 30Unvented Operation Horizontal VentingLength Requirements Vertical VentingMaximum Vent Lengths Vent MaterialVent and Roof Detail Standard Vented Heater Common Vertical Vent Termination Concentric Vent Box Vertical Unvented Installation Separated Combustion InstallationAIR Supply Building VentilationConnections GAS PipingPositioning Thermostats WiringFan Control Low Voltage Thermostat with One HeaterLow Voltage Thermostat with Multiple Heaters 30 Low Voltage Thermostat with Multiple Heaters 60 Transformer Internal Wiring DiagramFlame Ladder Wiring DiagramElectrical Connection to the Heater Operation and Maintenance Pressure Regulator Gas Outlet Outlet Pressure Turning Off the Heater Pressure SwitchCheck Gas Rate Instruction to the User Complete Start-UpUser Instructions User InstructionsHeater Operation Lighting Instructions 11.4.1 To Turn On HeaterTo Turn the Heater Off Simple TroubleshootingSimple Troubleshooting Burner Faults Servicing Venting and Air Intake Pipe Maintenance ChecklistVicinity of the Heater Vehicles and OtherCombustion Air Intake When installed Wall TagPipe Heat ExchangerTroubleshooting 13.1 General Conduct start-up procedure as shown on Page 29, Section Troubleshooting For Automatic Ignition Burner SystemsTroubleshooting for Flame Supervision System Troubleshooting for Flue Blower Troubleshooting for Gas ValvesBurner Components Replacement PartsBurner Injectors Burner CompartmentIgnition Electrode and Flame Probe Re-used Louver and Louver SpringsFlue Blower Vertical Installation Ignition Control Axial Fan/Guard/Motor AssemblyLimit Switches Removal and Replacement Fan Removal and ReplacementTo Replace the Fan Assembly Model Uhaxs Specifications 15.1 Dimension DataTechnical Data Table All Models General Technical Data Table All ModelsRoberts Gordon will not PAY for Warranty is Void ifRoberts-Gordon Limitations on Authority RepresentativesPage Owner Warranty Registration Card Page Page Some objects can catch fire or explode when placed
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60, 30, 45, 125, 100 specifications

Roberts Gordon is a recognized leader in the manufacturing of innovative heating solutions, with a diverse product line including the 100, 125, 75, 45, and 60 series of radiant tube heaters. Each model is designed to meet specific heating needs while emphasizing efficiency, durability, and performance.

The Robert Gordon 100 series is known for its high efficiency and ability to provide consistent warmth in large industrial spaces. It features advanced infrared technology, which heats objects and surfaces directly, resulting in quicker temperature increases and enhanced comfort. This model is equipped with modulating burners that allow for optimal gas usage and can be easily integrated into existing systems.

The 125 series builds upon the efficiency of the 100 model while offering increased heating capacity. Its robust design ensures it can handle the demands of larger applications, such as warehouses and manufacturing facilities. With enhanced control options, users can tailor the heating output to match specific operational requirements, reducing energy consumption.

The 75 series offers a compact solution for smaller commercial spaces, providing a reliable heating source without taking up excessive floor space. Its lightweight design facilitates easy installation, while the modular approach allows for scalability to meet changing heating demands. This series emphasizes sustainability, utilizing advanced combustion technologies that minimize emissions.

For smaller applications, the 45 series stands out with its efficient heating capabilities in confined spaces. This series features simple, yet effective controls, enabling straightforward operation. The robust construction ensures durability, making it well-suited for different commercial environments, including retail settings or small workshops.

Finally, the 60 series combines the best features of the range with energy conservation as a primary focus. Its innovative design incorporates smart technology to monitor energy usage and optimize performance. The heaters are equipped with the latest in safety features, providing peace of mind for users.

Overall, Roberts Gordon’s radiant tube heaters showcase a commitment to high-quality heating solutions that cater to a variety of industrial and commercial applications. With energy efficiency, superior durability, and advanced heating technologies as core characteristics, Roberts Gordon remains a trusted choice for businesses looking to enhance their heating performance.
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