102370-01K33For more information, visit www.desatech.comFor more information, visit www.desatech.comSAFETY INFORMATIONPRODUCT IDENTIFICATIONUNPACKINGTHEORY OF OPERATION• To prevent injury, wear gloves when handling heater.• Never attach duct work to heater.• Do not alter heater. Keep heater in its original state.• Do not use heater if altered.• Turn off propane supply to heater when not in use.• Use only original replacement parts. This heater must use de-sign-specific parts. Do not substitute or use generic parts. Im-proper replacement parts could cause serious or fatal injuries.SAFETY INFORMATIONContinuedPRODUCT IDENTIFICATIONPower CordHose /RegulatorAssemblyHot Air Outlet(Front)InletConnectorControlKnobMotorMountFan GuardFigure 1 - 100,000 Btu/Hr ModelHandleUNPACKING1. Remove all packing items applied to heater for shipment. Keepplastic cover caps (attached to inlet connector and hose/regu-lator assembly) for storage.2. Remove all items from carton.3. Check all items for shipping damage. If heater is damaged,promptly inform dealer where you bought heater.THEORY OF OPERATIONThe Fuel System: The hose/regulator assembly attaches to thepropane gas supply. The propane gas moves through the automaticcontrol valve and out the nozzle.The Air System: The motor turns the fan. The fan pushes air intoand around the combustion chamber. This air is heated and providesa stream of clean, hot air.The Ignition System: The spark transformer and ignitor lights themain burner.The Safety Control System: This system causes the heater to shutdown if the flame goes out.Note: Some parts are located differently on some models.Air For CombustionAnd HeatingFuelFigure 2 - Cross Section Operational ViewCombustionChamberCleanHeatedAir Out(Front)Hose/RegulatorAssemblyNozzle FanCoolAir In(Back)PowerCord