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Drain and flush fuel tank with clean kerosene. See Storage, page 8. Make sure electronic ignitor mounting is tight. Replace electronic ignitor. Press flame-out control reset button. Wait two minutes before trying to restart heater. If fan is hard to turn, see Pump Rotor, page 13. 9 10 099176 SERVICE PROCEDURES Air Output Filter Lint Filter Air Intake Filter Filter End Cover Air Output Filter Lint Filter Air Intake Filter Filter End Cover Fan Guard Figure 11 - Air Output, Air Intake, and Lint Filters, 35/50/55/70,000 BTU/Hr Models Figure 12 - Air Output, Air Intake, and Lint Filters, 100/110/150,000 BTU/Hr Models ! WARNING Fan Guard Upper Shell Removal 1. Remove screws along each side of heater using 5/16" nut-driver. These screws attach upper and lower shells together. 2. Lift upper shell off. 3. Remove fan guard. Never service heater while it is plugged in, operating, or hot. Severe burns and electrical shock can occur. Upper Shell Fan Guard Upper Shell Fan Guard Figure 7 - Upper Shell Removal, 35/50/55/70,000 BTU/Hr Models Figure 8 - Upper Shell Removal, 100/110/150,000 BTU/Hr Models Fan IMPORTANT: Remove fan from motor shaft before removing motor from heater. The weight of the motor resting on the fan could damage the fan pitch. 1. Remove upper shell (see above). 2. Use 1/8" allen wrench to loosen set-screw which holds fan to motor shaft. 3. Slip fan off motor shaft. 4. Clean fan using soft cloth moistened with kerosene or solvent. 5. Dry fan thoroughly. 6. (35/50/55/70/100,000 BTU/Hr Models) Replace fan on motor shaft. Place fan hub flush with end of motor shaft (see Figure 9). (150,000 BTU/Hr Model) Replace fan on motor shaft. Make sure set screw is touching back of flat surface on motor shaft (see Figure 10). 7. Place setscrew on flat of shaft. Tighten setscrew firmly (40-50 inch-pounds). 8. Replace fan guard and upper shell. Fan Fan Setscrew Motor Shaft Motor Flush Motor Shaft Back of Flat Surface on Motor Shaft Setscrew Motor Figure 9 - Fan Cross Section 35/50/55/70/100/110,000 BTU/Hr Models Figure 10 - Fan Cross Section 150,000 BTU/Hr Model Air Output, Air Intake, and Lint Filters 1. Remove upper shell (see above). 2. Remove filter end cover screws using 5/16" nut-driver. 3. Remove filter end cover. 4. Replace air output and lint filters. 5. Wash or replace air intake filter (see Preventative Maintenance Schedule, page 8). 6. Replace filter end cover. 7. Replace fan guard and upper shell. IMPORTANT: Do not oil filters. 11 099176 Pump Pressure Adjustment 1. Remove pressure gauge plug from filter end cover. 2. Install accessory pressure gauge (part number HA1180). 3. Start heater (see Operation, page 7). Allow motor to reach full speed. 4. Adjust pressure. Turn relief valve to right to increase pressure. Turn relief valve to left to decrease pressure. See specifications at right for correct pressure for each model. 5. Remove pressure gauge. Replace pressure gauge plug in filter end cover. Relief Valve Pressure Gauge Plug (35/50/55/70,000 BTU/Hr Models Shown) Figure 13 - Pressure Gauge Plug Removal Pump Model Pressure 35,000 BTU/Hr 3.0 PSI 50,000 BTU/Hr 3.6 PSI 55,000 BTU/Hr 3.4 PSI 70,000 BTU/Hr 4.0 PSI 100,000 BTU/Hr 4.0 PSI 110,000 BTU/Hr 4.5 PSI 150,000 BTU/Hr 5.0 PSI Pressure Gauge Figure 14 - Adjusting Pump Pressure Upper Fuel Line 100 FUEL FILTER REMOVAL PFA/P 041 Fuel Filter, Bushing, and Lower Fuel Line Figure 16 - Fuel Filter Removal...
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