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manual abstract
Remove pressure gauge. Replace pressure gauge plug in filter end cover. Figure 6 - Pressure Gauge Plug Removal Figure 7 - Adjusting Pump Pressure Pressure Gauge SERVICE PROCEDURES WARNING: Never service heater while it is plugged in, operating, or hot. Severe burns and electrical shock can occur. Figure 3 - Upper Shell Removal Figure 5 - Air Output, Air Intake, and Lint Filters Figure 4 - Fan Cross Section Upper Shell 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. 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 setscrew 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. Replace fan on motor shaft. Place fan hub flush with end of motor shaft (see Figure 4). 7. Place setscrew on flat of shaft. Tighten setscrew firmly (40-50 inch-pounds). 8. Replace fan guard and upper shell. Fan Motor Flush Setscrew Motor Shaft Air Intake Filter Filter End Cover Fan Guard Air Output Filter Lint Filter AIR OUTPUT, AIR INTAKE, AND LINT FILTERS 1. Remove upper shell (see Upper Shell Removal). 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 4). 6. Replace filter end cover. 7. Replace fan guard and upper shell. IMPORTANT: Do not oil filters. Relief Valve Pressure Gauge Plug OWNER’S MANUAL SERVICE PROCEDURES Continued FUEL FILTER 1. Remove 4 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 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. Fuel Filter Side Cover Upper Fuel Line Figure 8 - Fuel Filter Removal IGNITOR 1. Remove upper shell and fan guard (see page 6). 2. Remove fan (see page 6). 3. Remove 4 side cover screws with a 5/16" nut driver. Remove side cover (see Figure 8). 4. Disconnect ignitor wires (gray) from ignition control assembly (see Figure 9). Pull the ignitor wires up through the hole in the lower shell. 5. Disconnect fuel line hose and air line hose. Remove photocell from photocell bracket (see Figure 9). 6. Remove combustion chamber. Stand combustion chamber on end with nozzle adapter bracket on top (see Figure 10). 7. Remove ignitor screw with a 1/4" nut driver. Carefully remove ignitor from nozzle adapter bracket. CAUTION: Do not bend or strike ignitor element. Handle with care. 8. Carefully remove replacement ignitor from styrofoam packing. 9. Carefully guide ignitor into opening in nozzle adapter bracket. Do not strike ignitor element. Attach ignitor to nozzle adapter bracket with screw using a 1/4" nut driver (see Figure 10). Torque 10 to 20 in. lbs. Do not over torque. 10. Replace combustion chamber. 11. Route the ignitor wires back down through the hole in the lower shell. Connect wires to the ignition control assembly. See Wiring Diagrams, page 10, for correct terminal locations. 12. Replace side cover (see Figure 8). 13. Connect and route fuel line hose and air line hose to nozzle adapter (see Figure 9). 14. Replace photocell in photocell bracket. Route wires as shown in Figure 11, page 8. 15. Replace fan (see page 6). 16. Replace fan guard and upper shell (see page 6). Combustion Nozzle Chamber Ignitor Wires (Gray) Ignitor Adapter Bracket Ignition Control Assembly Side Cover Photocell Bracket Photocell Assembly Air Line Hose Fuel Line Hose Figure 9 - Disconnecting Ignitor Wires from Ignition Control Assembly Figure 10 - Ignitor Replacement Combustion Chamber Photocell Bracket Ignitor Ignitor Screw Nozzle Adapter Bracket Nozzle Adapter Bracket Opening Ignitor Element Continued 7 8 102388 PORTABLE FORCED AIR HEATERS 35,000, 50,000, And 55,000 Btu/Hr H.S.I. Series PUMP ROTOR (Procedure if Rotor is Binding) 1. Remove upper shell (see page 6). 2. Remove filter end cover screws using 5/16" nut-driver. 3. Remove filter end cover and air filters. 4. Remove pump plate screws using 5/16" nut-driver. 5. Remove pump plate. 6. Remove rotor, insert, and blades. 7. Check for debris in pump. If debris is found, blow out with compressed air. 8. Install insert and rotor. 9. Check gap on rotor. Adjust to .003"/.004" if needed (see Figure 15). Note: Rotate rotor one full turn to insure the gap is .003"/.004" at tightest position. Adjust if needed. 10. Install blades, pump plate, air filters, and filter end cover. 11. Replace fan guard and upper shell. 12. Adjust pump pressure (see Pump Pressure Adjustment, page 6). Note: If rotor is still binding, proceed as ...