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Manafacture: Roberts Gorden File size: 2.09 mb File name: Language of manual:

Valves See Page 16, Section 8. Burner Observation Make sure it is clean and free of cracks or holes. Window Clean and replace as required. Flue Blower Scroll, Wheel Compressed air or a vacuum cleaner may be used to clean dust and dirt. and Motor Inshot Burners and Orifices Clear obstructions (even spider webs will cause problems). Carefully remove any dust and debris from the burner. Direct-Spark Igniter Replace if there are cracked ceramics, excessive carbon residue, or erosion of the electrode. The electrode gap should be 1/8" (3.2 mm). Thermostat There should be no exposed wire or damage to the device or wiring. See Page 17, Section 9. Suspension Points Make sure the heater is hanging securely. Look for signs of wear on the suspension materials or ceiling. See Page 8, Figure 3. Silicone Tubing Ensure tight, secure fit on all pressure fittings at pressure switch, burner partition, and blower outlet. Gas Valve Verify that cap covering pressure regulator adjustment screw is secure and has not been tampered with. Verify all wiring connections. Condensate Drain Flush drain and clear any obstructions. (when installed) Ductwork Consult an indoor air quality professional for proper cleaning procedures Air Circulation Blower For a complete inspection, refer the manufacturers Installation, Operation and Service manual. Wall Tag If wall tag is present, make sure it is legible and accurate. Please contact Roberts-Gordon LLC or your ROBERTS-GORDON® independent distributor if you need a wall tag. See Page 2, Section 2.1. UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL SECTION 13: TROUBLESHOOTING 13.1 General Fan and limit switch are operating normally. Replace temperature limit switch. Ensure air flow through heat exchanger is appropriate per the rating plate. If problems persist, contact Roberts-Gordon LLC at Heater Operating TROUBLESHOOT ENDS. No The limit switch has tripped. See Manual Reset Limit Switch Figure. No Use Troubleshooting for Automatic Ignition Burner Systems section to test burner. Has burner “Locked Out”? Yes No With external controls (i.e. thermostat) on, does the burner continue through the heating cycle? No YesDoes the flue blower run? No Use Troubleshooting for Flue Blower section to test fan. Yes Yes Burner has locked out due to ignition failure. Use Troubleshooting for Automatic Ignition Burner Systems section to test burner. Is ignition control showing a "2 flashes" LED code? Yes No Yes START Wait 10 - 15 minutes for limit switch to cool. Does fan stop running? No Turn on supplies. Are gas & electrical supplies on? Yes Is ignition control showing a "4 flashes" LED code? Yes No Yes No WARNING Explosion Hazard Installation, service and annual inspection must be done by a contractor qualified in the installation and service of gas-fired heating equipment or your gas supplier. Turn off gas and electrical supplies before performing service or maintenance. Failure to follow these instructions can result in death, injury or property damage. SECTION 13: TROUBLESHOOTING 13.2 Troubleshooting For Automatic Ignition Burner Systems START If problems persist, contact Roberts-Gordon LLC at Heater Operating TROUBLESHOOT ENDS. No Trace fault in supervision system. See Troubleshooting for Flame Supervision System section. Yes Is ignition control showing a "2 flashes" LED code? No Is the flame current at least 1 .Amp DC when the flame ignites? Ignition control faulty; replace. See Ignition Control section. Is ignition lead okay and connected? Is spark electrode okay? Yes Replace valve. Is the gas valve operating? To test valve, See Troubleshooting for Gas Valves section. NoDoes the flame light? No Yes Wait 30 - 40 seconds. Does ignition spark operate? No Yes Flue blower faulty; replace 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 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. Does air pressure switch change over? No Yes Is 120 V supply at fan connections? Does flue blower run? No Yes Yes No Yes Fan and limit switch are operating normally. Replace temperature limit switch. Wait 10 - 15 minutes for limit switch to cool. Does fan stop running? No Is ignition control showing a "4 flashes" LED code? Yes No Yes Turn on controls. Are external controls (i.e. Thermostat) on? No Yes Turn on supplies. Are gas & electrical supplies on? Yes No For optimum heater performance, use only replacement parts sold and supplied by Roberts-Gordon. Conduct start-up procedure as shown on Page 21, Section 10. UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL 13.3 Troubleshooting for Flame Supervision System To measure flame current, connect a 0 -50 .A DC meter in series with the flam...

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