Desa BC115DT Owner's Manual

Contents

12 116170-01Awww.desatech.comSERVICE PROCEDURESContinuedIGNITOR1. Remove upper shell and fan guard (See UpperShell Removal, page 10).2. Remove fan (see page 10).3. Remove 4 side cover screws with a 5/16" nutdriver. Remove side cover (see Figures 19 or20, page 11).4. Disconnect ignitor wires from ignition controlassembly (see Figure 21). Pull the ignitorwires up through the hole in the lower shell.5. Disconnect fuel line hose and air line hose.Remove photocell from photocell bracket (seeFigure 21).6. Remove combustion chamber. Stand com-bustion chamber on end with nozzle adapterbracket on top (see Figure 22).7. Remove ignitor screw with a 1/4" nut driver.Carefully remove ignitor from nozzle adapterbracket.CAUTION: Do not bend orstrike ignitor element. Handlewith care.8. Carefully remove replacement ignitor frompacking.9. Carefully guide ignitor into opening in nozzleadapter bracket. Do not strike ignitor element.Attach ignitor to nozzle adapter bracket withscrew using a 1/4" nut driver (see Figure 23).Torque .90 to 1.69 N-m (8 to 15 in-lbs) Do notover torque.10. Replace combustion chamber.11. Route the ignitor wires back down through thehole in the lower shell. Connect wires to theignition control assembly (see Figure 22).12. Replace side cover (see Figures 19 or 20,page 11).13. Connect and route fuel line hose and air linehose to nozzle adapter assembly. See Fuel andAir Line Replacement and Proper Routing,page 14.14. Replace photocell in photocell bracket. Routewires as shown in either (see Figure 23 orFigure 24, page 13).15. Replace fan (see page 10).16. Replace fan guard and upper shell (seepage 10).PhotocellBracketIgnitorIgnitor Screw/Washer AssemblyNozzleAdapterBracketIgnitorElementCombustionChamber Nozzle AdapterBracket OpeningFigure 22 - Ignitor ReplacementFigure 21 - Disconnecting Ignitor Wiresfrom Ignition Control AssemblyPhotocellBracketAir LineHoseFuelLineHoseCombustionChamberPhotocellAssemblyIgnitorNozzleAdapterBracketIgnitionControlAssemblySide CoverIgnitorWireFigure 23 - Removing Air and Fuel LineHoses (40/55/70 Models Only)Fuel Line HoseAir LineHoseNozzle/AdapterAssemblyCombustionChamberPhotocellBracketNozzleAdapterBracket