Roberts Gorden 125, 75, 100 Lighting Instructions 12.3.1 To Turn On Heater, To Turn Heater Off

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UHD LOW PROFILE DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL

Figure 17: Manual Reset Limit Switch

Reset Button

To reset manual reset limit switch, press reset

button. NOTE: To reset, the switch must be cool.

Description

Part Number

Manual Reset Limit Switch

90412106

12.3Lighting Instructions 12.3.1 To Turn On Heater

1. Ensure that the electrical and gas supplies to the heater are on. Check that the on site controls are "ON".

IMPORTANT: The thermostat setting must be above the ambient temperature for the heater to operate.

2.The automatic firing sequence will begin as described on Page 27, Figure 15. The heater will now operate automatically under the control of the on site controls.

12.3.2 To Turn Heater Off

Set the thermostat to the "OFF" position. The burner will turn off immediately.

To restart, turn the thermostat above room temperature.

12.4 Simple Troubleshooting

Some possible reasons for the heater not operating are:

1.Gas supply not "ON".

2.Electricity supply not "ON".

3.The time and/or temperature controls are not "ON".

4.A limit switch may have operated. This may be caused by an interruption of the electrical supply, failure of the distribution fan or vent or heat exchanger blockage.

If a temperature limit switch persistently trips, there is a fault which must be investigated by a contractor qualified in the installation and service of gas-fired heating equipment.

12.4.1 Simple Troubleshooting (Burner Faults)

If the burner fails to ignite for any reason, it will retry for ignition (four trials total). After four unsuccessful ignition trials, the control will put the heater into lockout for one hour.

Lockout should not occur during normal operation of the heater and indicates there is a fault condition which must be corrected. There is an LED light on the ignition control that flashes codes to assist in fault correction. See Page 30, Figure 18 for LED indication codes.

Figure 18: LED Diagnostic Codes

LED INDICATION

FAULT MODE

 

 

Slow Flash

Normal Operation - No call for heat.

 

 

Fast Flash

Normal Operation - Call for heat.

 

 

2 Flashes

Ignition Lockout - No flame detected.

 

 

3 Flashes

Airflow Fault - Pressure switch open or closed.

 

 

4 Flashes

Temperature Limit or

 

Manual Reset Limit Switch Open

 

 

5 Flashes

Flame Sense Error - Gas valve not energized.

 

 

Steady On

Internal Control Failure

 

 

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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 RequirementsReplacing an Existing Heater in a Venting System Maximum Vent LengthsVent Material Model Standard Vented Heater Common Vertical Vent Termination Concentric Vent Box UHVK1 Building Ventilation Unvented InstallationAIR Supply Outside Combustion Air SupplyConnections GAS PipingFire Hazard Connect gas supply according to Figure Hold gas nipple securely with pip wrench When attaching flexible gass connectorProduct Damage Hazard 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.