Roberts Gorden 75, 100, 125 service manual Wiring

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UHD LOW PROFILE DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL

SECTION 10: WIRING

DANGER

Electrical Shock Hazard

Disconnect electric before service.

More than one disconnect switch may be required to disconnect electric from equipment.

Equipment must be properly grounded.

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

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 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.

10.2 Low Voltage Thermostat with One Heater

10.1 Positioning Thermostats

Aroom 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 4, Section 2.1 for wall tag details.

24 Volt

Thermostat

Terminal

Strip

Gas

G

 

 

 

R

 

 

Supply

W

 

 

 

 

 

C

 

 

 

 

 

 

Electrical

 

 

 

Supply

 

 

 

R

W

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Contents Combat Page Combat Page Roberts-Gordon LLC Page Table of Figures Page Safety Labels and Their Placement Heater SafetyManpower Requirements California PropositionUhdxs 75 Label Placement Combat Corrosive Chemicals Installer ResponsibilityWall Tag National Standards and Applicable CodesCritical Considerations Clearances to Combustibles National Standards and Applicable Codes High Altitude Air Flow and Temperature Rise Ranges Duct Heater Installation 6.1 GeneralTemperature Rise and Pressure Drop Ranges Minimum Inlet Duct LengthWall Mounting Suspension MethodsShelf-Mounting Methods United States Requirements Vent InstallationVenting Canadian RequirementsVertical Venting Standard Vented Heaters Models Uhdx 75Horizontal Venting Length RequirementsMaximum Vent Lengths Vent MaterialReplacing an Existing Heater in a Venting System Model Standard Vented Heater Common Vertical Vent Termination Concentric Vent Box UHVK1 Building Ventilation Unvented InstallationAIR Supply Outside Combustion Air SupplyGAS Piping Fire Hazard Connect gas supply according to FigureConnections When attaching flexible gass connector Product Damage HazardHold gas nipple securely with pip wrench Wiring Uhdxs Series Internal Wiring Diagram L2 L1Uhdxs Series Ladder Wiring Diagram Flue Blower Transformer GAS Valve Flame Sensor ElectrodeElectrical Connection to the Heater Electrical Checks Operation and MaintenancePre-Start-Up Checks Begin Start-Up Before Operating the HeaterAutomatic Burner Control Sequence END ViewTurning Off the Heater Pressure SwitchCheck Gas Rate External ControlsUser Instructions Heater OperationLighting Instructions 12.3.1 To Turn On Heater Simple TroubleshootingSimple Troubleshooting Burner Faults To Turn Heater OffServicing Vehicles and Other Annual Fall Start-upVicinity of the Heater ObjectsPipe When installed DuctworkCombustion Air Intake Heat ExchangerTroubleshooting General StartTroubleshooting For Automatic Ignition Burner Systems Conduct start-up procedure as shown on Page 26, 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 Limit Switches Removal and Replacement Ignition ControlSpecifications 16.1 Dimension Data TOP ViewGeneral Technical Data Table Technical Data TablePage Roberts-Gordon LLC Warranty is Void ifROBERTS-GORDON LLC will not PAY for Limitations on Authority RepresentativesPage Owner Warranty Registration Card Mail or Fax toPage
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125, 100, 75 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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