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24 INSPECTING PILOT AND BURNER FLAME Continued Sharp Blue Flame Ragged Yellow Flame Flame Lifting Off of Burner Figure 22 - Incorrect Burner Flame Patterns If burner flame pattern is incorrect, as shown in Figure 22 • turn heater off (see To Turn Off Gas to Appliance, page 23) • see Troubleshooting, pages 27 through 31. Figure 21 - Correct Burner Flame Pattern 25 CLEANING AND MAINTENANCE 26 WARNING Turn off heater and let cool before cleaning or servicing. WARNING Keep heater clear and free from combustible materials, gasoline, and other flammable vapors and liquids. CAUTION You must keep control areas, burner, and circulating air passageways of heater clean. Inspect these areas of heater before each use. Have heater and venting system inspected yearly by a qualified service person. Heater may need more frequent cleaning due to excessive lint from carpeting, bedding material, etc. CABINET Air Passageways • Use a vacuum cleaner or pressurized air to clean. Exterior • Use a soft cloth dampened with a mild soap and water mixture. Wipe the cabinet to remove dust. COMBUSTION CHAMBER AND BURNER Clean the combustion chamber and burner if you have run the heater with a high yellow flame. Incomplete combustion from lack of air causes the yellow flame. This will deposit soot inside the combustion chamber and on the burner. To clean combustion chamber and burner, you must remove the burner from heater. See Service Procedures, page 33, to remove burner. After removing burner, blow inside of combustion chamber clean with compressed air. Clean burner with a steel-wire brush. Blow soot from burner with compressed air. PILOT Use a vacuum cleaner, compressed air, or small, soft-bristled brush to clean. BURNER ORIFICE Use a vacuum cleaner, compressed air, or small, soft-bristled brush to clean. You can also use a tooth pick to clean orifice. Do not enlarge or damage orifice hole. PILOT AND BURNER FLAME Check the pilot and burner flame monthly. Make sure pilot and burner flame is burning correctly. See Inspecting Pilot and Burner Flame, page 24. VENTING SYSTEM Check the venting system at least once a year. Make sure joints are secure and vent pipe is in good condition. Do not obstruct combustion and ventilation air entering the rear of heater. BLOWER MOTOR (For Models with Blower) The motor on a new blower is properly lubricated at the factory. The first heating season, the motor will need no additional care. At the beginning of each season afterwards, place a few drops of SAE 20 motor oil in the lubrication holes of motor. Locate the lubrication holes at front and rear of motor on motor casing. TROUBLESHOOTING Note:All troubleshooting items are listed in order of operation. WARNING Turn off and unplug heater and let cool before servicing. Unless you need gas supply for testing, shut off manual shutoff valve before servicing. Only a qualified service person should service and repair heater and venting system. CAUTION Never use a wire, needle, or similar object to clean pilot. This can damage pilot. OBSERVED POSSIBLE PROBLEM CAUSE REMEDY When ignitor button is pressed, there is no spark at pilot. When ignitor button is pressed, there is spark at pilot but no ignition. 1. Incorrect spark gap. 1. Adjust spark gap to 1/16". 2. Ignitor electrode posi2. Replace ignitor. tioned wrong. 3. Ignitor electrode broken. 3. Replace ignitor. 4. Ignitor electrode not con4. Reconnect ignitor cable. nected to ignitor cable. 5. Ignitor cable pinched or 5. Free ignitor cable if wet. pinched by any metal or tubing. Keep ignitor cable dry. 6. Piezo ignitor nut is loose. 6. Tighten nut holding piezo ignitor to heater cabinet. Nut is located inside heater cabinet at top. 7. Broken or frayed ignitor 7. Replace ignitor cable. cable. 8. Loose ignitor cable. 8. Reconnect ignitor cable. 9. Bad piezo ignitor. 9. Replace piezo ignitor. 1. Gas supply turned off or 1. Turn on gas supply or manual shutoff valve open manual shutoff closed. valve. 2. Control knob not in 2. Turn control knob to PILOT position. PILOT position. 3. Control knob not 3. Press in control knob pressed in while in while in PILOT position. PILOT position. 4. Air in gas lines when 4. Continue holding down installed. control knob. Repeat igniting operation until air is removed. 5. Depleted gas supply. 5. Contact local propane gas company. 6. Pilot is clogged. 6. Clean pilot (see Cleaning and Maintenance, page 26) or replace pilot assembly. 7. Gas regulator setting is 7. Replace control valve. not correct. Continued OBSERVED POSSIBLE TROUBLE PROBLEM CAUSE REMEDY SHOOTING Pilot lights but flame Continued goes out when control knob is released. Burner does not light after pilot is lit. 1. Manual shutoff valve not fully open. 2. Control knob not fully pressed in. 3. Control knob not pressed in long enough. 4. Safety interlock system has been triggered. 5. Thermocouple connection loose at control valve. 6. Pilot flame not touching thermocouple, which allows thermocouple to cool, causing pilot fl...

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