Desa B110BT Owner's Manual

Contents

8104192PORTABLE FORCED AIR HEATER110,000 Btu/Hr H.S.I. SeriesFigure 9 - Fuel Filter RemovalSERVICEPROCEDURESContinuedFUEL FILTER1. 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, fuel filter, andlower fuel line out of fuel tank.5. Wash fuel filter with clean fuel and re-place in tank.6. Attach upper fuel line to fuel filter neck.7. Replace side cover.Side CoverFuel Filter, Bushing,and Lower Fuel LineUpper Fuel LineWARNING: Never serviceheater while it is plugged in, oper-ating, or hot. Severe burns andelectrical shock can occur.IGNITOR1. Remove upper shell and fan guard (seepage 7).2. Remove fan (see page 7).3. Remove 4 side cover screws with a5/16" nut driver. Remove side cover(see Figure 9).4. Disconnect ignitor wires (yellow) fromignition control assembly (see Figure10). Pull the ignitor wires up throughthe hole in the lower shell.5. Disconnect fuel line hose and air linehose. Remove photocell from photocellbracket (see Figure 10).6. Remove combustion chamber. Standcombustion chamber on end with nozzleadapter bracket on top (see Figure 11).7. Remove ignitor screw with a 1/4" nutdriver. Carefully remove ignitor fromnozzle adapter bracket.8. Carefully remove replacement ignitorfrom styrofoam packing.9. Carefully guide ignitor into opening innozzle adapter bracket. Do not strikeignitor element. Attach ignitor to nozzleadapter bracket with screw using a1/4" nut driver (see Figure 11). Torque8 to 15 in. lbs. Do not over torque.10. Replace combustion chamber.11. Route the ignitor wires back down throughthe hole in the lower shell. Connect wiresto the ignition control assembly.12. Replace side cover (see Figure 9).13. Connect fuel line hose and air line hoseto nozzle assembly. See Fuel and AirLine Replacement and Proper Routing,page 9.14. Replace photocell in photocell bracket.15. Replace fan (see page 7).16. Replace fan guard and upper shell (seepage 7).CombustionChamberPhotocellBracketPhotocellAssemblyAirLineHoseFuelLineHosePhotocellBracketIgnitorWiresNozzleAdapterBracketIgnitionControlAssemblySide CoverFigure 10 - Disconnecting Ignitor Wiresfrom Ignition Control AssemblyIgnitorIgnitor Screw/WasherAssemblyNozzleAdapterBracketNozzle AdapterBracket OpeningIgnitorElementCAUTION: Do not bend or strikeignitor element. Handle with care.CombustionChamberFigure 11 - Ignitor ReplacementIgnitor