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4. Replace fuel cap or drain plug. Properly dispose of old and dirty fuel. Check with local automotive service stations that recycle oil. 5. If storing, store heater in dry place. Make sure storage place is free of dust and corrosive fumes. IMPORTANT: Do not store kerosene over summer months for use during next heating season. Using old fuel could damage heater. Item How Often How To Fuel tank Flush every 150-200 hours of operation or as needed. See Storing, Transporting or Shipping,column 1 Air output and lint filters Replace every 500 hours of, operation or once a year. See Air Output, Air Intake, and Lint Filters, page 10. Air intake filter Wash and dry with soap and water every 500 hours of operation or as needed. See Air Output, Air Intake, and Lint Filters, page 10. Fuel filter Clean twice a heating season or as needed. See Fuel Filter, page 8. Spark plug Clean and regap every 600 hours operation or replace as needed. See Spark Plug, page 9. Fan blades Clean every season or as needed. See Fan, page 13. MotorNot required/permanently lubricated 6 OWNER’S MANUAL TROUBLESHOOTING WARNING: Never service heater while it is plugged in, operating, or hot. Severe burns and electrical shock can occur. OBSERVED FAULT POSSIBLE CAUSE REMEDY Heater ignites, but flame-out control shuts 1. Wrong pump pressure 1. See Pump Pressure off heater after a short period of time. Adjustment, page 10. 2. Dirty air output, air intake, and lint filters 2. See Air Output, Air Intake and Lint Filters, page 10. 3. Dirty fuel filter 3. See Fuel Filter, page 8. 4. Dirt in nozzle 4. See Nozzle, page 11. 5. Dirty photocell lens 5. Clean photocell lens. 6. Bad flame-out control 6. Replace flame-out control. Heater will not ignite, but motor runs for a 1. Wrong pump pressure 1. See Pump Pressure Adjustment, page 10. short period of time. 2. Carbon deposits on spark plug and/or 2. See Spark Plug, page 9. improper gap 3. Dirty fuel filter 3. See Fuel Filter, page 8. 4. Dirt in nozzle 4. See Nozzle, page 11. 5. Water in fuel tank 5. Drain and flush fuel tank with clean kerosene. See Storing, Transporting, or Shipping, page 6. WARNING: High voltage! 6. Electronic ignitor not grounded (earthed) 7. Bad electronic ignitor 6. Make sure electronic ignitor mounting is tight. 7. Replace electronic ignitor. Motor does not start when heater is plugged in, fan rotates slowly or does not turn. 1. Flame-out control not reset 2. Binding pump rotor 1. Reset flame-out control button, see Figures 5 and 6, page 5. 2. If fan is hard to turn, see Pump Rotor, page 12. 7 8 104468 PORTABLE FORCED AIR HEATERS R Figure 9 - Fuel Filter Removal, 35/70,000 Btu/Hr Models Fuel Filter Side Cover Fuel Line Fuel Filter, Bushing, and Lower Fuel Line Side Cover Upper Fuel Line Figure 10 - Fuel Filter Removal, 100/150,000 Btu/Hr Models SERVICE PROCEDURES Upper Shell Removal 1. Remove screws and lock washers along each side of heater using 5/16" nutdriver. These screws attach upper and lower shells together. 2. Lift upper shell off. 3. Remove fan guard. Fuel Filter (35/70,000 Btu/Hr Models) 1. Remove side cover screws using 5/16" nut-driver. 2. Remove side cover. 3. Pull rubber fuel line off fuel filter neck. 4. Carefully pry bushing and fuel filter out of fuel tank. 5. Wash fuel filter with clean fuel and replace in tank. 6. Attach rubber fuel line to fuel filter neck. 7. Replace side cover. Fuel Filter (100/150,000 Btu/Hr Models) 1. Remove side cover screws using 5/16" nut-driver. 2. Remove side cover. 3. Pull upper fuel line off fuel filter neck. 4. Carefully pry bushing, lower fuel line, and fuel filter out of fuel tank. 5. Wash fuel filter with clean fuel and replace in tank. 6. Attach upper fuel line to fuel filter neck. 7. Replace side cover. WARNING: Never service heater while it is plugged in, operating, or hot. Severe burns and electrical shock can occur. Upper Shell Fan Guard Fan Guard Upper Shell Figure 7 - Upper Shell Removal, 35/70,000 Btu/Hr Models Figure 8 - Upper Shell Removal, 100/ 150,000 Btu/Hr Models OWNER’S MANUAL SERVICE PROCEDURES Continued Spark Plug (35,000 Btu/Hr Model) 1. Remove upper shell (see page 8). 2. Remove fan (see page 13). 3. Remove fuel and air line hoses from nozzle assembly. 4. Remove spark plug wire from spark plug. 5. Remove two screws using 5/16" nut- driver and remove burner strap. 6. Place hex-body of spark plug into vise and tighten. 7. Remove spark plug mounting nut using 11/16" open-end wrench. 8. Remove burner strap from spark plug. 9. Clean and regap spark plug electrodes to 1.4 mm (.055") gap. 10. Replace burner strap onto spark plug. Rotate burner strap to position spark plug electrodes (see Figure 13). 11. Tighten spark plug with spark plug mounting nut. 12. Release hex-body of spark plug from vise. 13. Replace burner strap onto combustion chamber. 14. Attach spark plug wire to spark plug. 15. Attach fuel and air line hoses to nozzle assembly. 16. Replace fan (see page 13). 17. Replace fan guard and upper shell. Combustion Bu...

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