110373-01AFor more information, visit www.desatech.comFor more information, visit www.desatech.com12CLEANING AND MAINTENANCEODS/Pilot and BurnerCleaning Burner Pilot Air InletCabinetCABINETAir Passageways• Use a vacuum cleaner or pressurized air to clean.Exterior• Use a soft cloth dampened with a mild soap and water mixture.Wipe the cabinet to remove dust.Figure 22 - Pilot Inlet Air HolePilot AssemblyPilot Air InletHoleCLEANING ANDMAINTENANCEODS/PILOT AND BURNER• Use a vacuum cleaner, pressurized air, or small, soft bristledbrush to clean.CLEANING BURNER PILOT AIR INLETThe primary air inlet holes allow the proper amount of air to mix withthe gas. This provides a clean burning flame. Keep these holes clearof dust, dirt, and lint. Clean these air inlet holes prior to each heatingseason. Blocked air holes will create soot. We recommend that youclean the unit every three months during operation and have heaterinspected yearly by a qualified service person.We also recommend that you keep the burner tube and pilotassembly clean and free of dust and dirt. To clean these parts werecommend using compressed air no greater than 30 PSI. Your localcomputer store, hardware store, or home center may carry com-pressed air in a can. You can use a vacuum cleaner in the blowposition. If using compressed air in a can, please follow the direc-tions on the can. If you don't follow directions on the can, you coulddamage the pilot assembly.1. Shut off the unit, including the pilot. Allow the unit to cool forat least thirty minutes.2. Inspect burner, pilot for dust and dirt.3. Blow air through the ports/slots and holes in the burner.4. Never insert objects into the pilot tube.Clean the pilot assembly also. A yellow tip on the pilot flameindicates dust and dirt in the pilot assembly. There is a small pilotair inlet about two inches from where the pilot flame comes out ofthe pilot assembly (see Figure 22). With the unit off, lightly blow airthrough the air inlet. You may blow through a drinking straw ifcompressed air is not available.WARNING: Turn off heater and let cool beforecleaning.CAUTION: You must keep control areas, burner,and circulating air passageways of heater clean.Inspect these areas of heater before each use. Haveheater inspected yearly by a qualified service person.CAUTION: You must check and keep burner/venturi tubes clean of insect and insect nest. Aclogged tube can lead to a fire.(Propane/LPPilot Shown)Pilot AssemblyPilot Air InletFigure 23 - Injector Holder On Burner TubeBurnerTubeInjector HolderPorts/Slots