Roberts Gorden 75, 100 Check Gas Rate, Pressure Switch, Turning Off the Heater, External Controls

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UHD LOW PROFILE DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL

11.2.2Start-Up the Gas Valve (All Gases) 11.2.2.1 Check Burner Gas Pressure

1. Remove the plug in the outlet (burner) pressure test point and connect a pressure tap and a manometer.

2.With the burner firing, measure the pressure on the manometer. To adjust the burner pressure, remove the regulator cover from the valve and turn the regulator adjustment screw to set the required burner pressure as stated in the Technical Data Table for the correct gas and model on Page 45, Section 16.3.

IMPORTANT: If the correct burner pressure cannot be reached, then check the inlet pressure to the valve with the burner firing. See Technical Data Table on Page 45, Section 16.3 for inlet pressure requirement.

Do not continue to adjust the regulator if the pressure is not changing.

If the inlet pressure is too low to allow correct burner pressure setting, then the gas inlet pressure must be corrected before completing the start-up.

Check Gas Rate

1.After burner pressure adjustment, allow the heater to operate for at least 15 minutes and then re-check settings. Adjust pressure setting if necessary.

2.Check gas flow rate at gas meter.

3.Turn off heater and electrical supply.

4.Remove the manometer and refit all covers to the valve and tighten the screw of the outlet pressure tap.

11.2.3 Pressure Switch

The pressure switch is factory pre-set for each model and is not adjustable.

11.2.4 Turning Off the Heater

Set the thermostat to the "OFF" position or lowest setting and the main burner will stop.

11.2.5 External Controls

External controls may include time switch, interlock switch, room thermostat and frost thermostat. Operate each control to ensure that they function correctly. Set the switches (if fitted) and thermostat(s) to the users’ requirements.

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11.3 Complete Start-Up

Ensure that all covers are fitted correctly and all test points are properly sealed.

11.3.1 Instruction to the User

Explain the controls of the heater to the user

including how to turn it on and off, using the controls fitted on site.

Give this manual to the user.

Ensure that the user is shown and understands the importance of maintaining clearances to combustibles on Page 6, Figure 3, installer responsibility on Page 4, Section 2, user instructions on Page 29, Section 12 and all warnings defined in this manual.

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Contents Combat Page Combat Page Roberts-Gordon LLC Page Table of Figures Page Heater Safety Manpower RequirementsSafety Labels and Their Placement California PropositionUhdxs 75 Label Placement Combat Installer Responsibility Wall TagCorrosive Chemicals National Standards and Applicable CodesCritical Considerations Clearances to Combustibles National Standards and Applicable Codes High Altitude Duct Heater Installation 6.1 General Temperature Rise and Pressure Drop RangesAir Flow and Temperature Rise Ranges Minimum Inlet Duct LengthWall Mounting Suspension MethodsShelf-Mounting Methods Vent Installation VentingUnited States Requirements Canadian RequirementsStandard Vented Heaters Models Uhdx 75 Horizontal VentingVertical 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 Unvented Installation AIR SupplyBuilding Ventilation 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 Operation and Maintenance Pre-Start-Up ChecksElectrical Checks Begin Start-Up Before Operating the HeaterAutomatic Burner Control Sequence END ViewPressure Switch Check Gas RateTurning Off the Heater External ControlsUser Instructions Heater OperationSimple Troubleshooting Simple Troubleshooting Burner FaultsLighting Instructions 12.3.1 To Turn On Heater To Turn Heater OffServicing Annual Fall Start-up Vicinity of the HeaterVehicles and Other ObjectsWhen installed Ductwork Combustion Air IntakePipe 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 Warranty is Void if ROBERTS-GORDON LLC will not PAY forRoberts-Gordon LLC 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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