UHD LOW PROFILE DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL

14.2Troubleshooting For Automatic Ignition Burner Systems

START

Are gas & electrical

No

Turn on supplies.

 

 

supplies on?

 

 

 

 

 

 

Yes

 

 

 

 

Are external controls

No

Turn on controls.

 

 

(i.e. Thermostat) on?

 

 

 

 

 

 

Yes

 

UHD 75: Press in reset

 

 

 

 

button on manual reset limit

 

 

Is ignition control showing a

 

switch. UHD 100 - 125: Wait

 

Fan and limit switch are

"4 flashes" LED code?

Yes

10 - 15 minutes for limit

Yes

operating normally.

 

 

switch to cool. Does fan

 

 

 

 

stop running?

 

 

No

Replace temperature limit

switch.

No

Does flue blower run?

No

 

Yes

Does air pressure switch

Is 120 V supply at fan

Yes

Flue blower faulty;

connections?

replace

 

No

Burner control faulty or wiring

connections faulty. Repair

or replace as required

Check for too much vent/air inlet duct. Check for blockage in vent and combustion air circuit. Check for faulty air pressure

change over?

Yes

No

switch. Check pressure switch hoses for leaks or cracks. Do not attempt to circumvent pressure switch circuit to

place unit in operation.See Pressure Switch section for details.

Wait 30 - 40 seconds.

Does ignition spark No operate?

Yes

Does the flame light?

No

Yes

Is ignition control showing

a "2 flashes" LED code? Yes

No

Heater Operating

TROUBLESHOOT ENDS. No

Is ignition lead okay and

Yes

Ignition control faulty;

connected?

replace.

Is spark electrode okay?

 

See Ignition Control section.

Is the gas valve operating?

 

 

To test valve, See

No

Replace valve.

Troubleshooting for Gas

 

 

Valves section.

 

 

Is the flame current at

 

Trace fault in supervision

least 1 μAmp DC when

Yes

system. See

the flame ignites?

 

Troubleshooting

for Flame Supervision

System section.

If problems persist, contact

Roberts-Gordon LLC at

www.rg-inc.com

For optimum heater performance, use only replacement parts sold and supplied by Roberts-Gordon LLC.

Conduct start-up procedure as shown on Page 26, Section 11.

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Roberts Gorden 125, 75, 100 service manual Troubleshooting For Automatic Ignition Burner Systems

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.