4105843PORTABLE FORCED AIR HEATERSD20H, D30H AND D44H MODELSASSEMBLYThese models are furnished with wheels andhandles. Wheels, handles, and the mountinghardware are found in the shipping carton.TOOLS NEEDED• Medium Phillips Screwdriver• 3/8" Open or Adjustable Wrench• Hammer1. Slide axle through wheel supportframe. Install wheels on axle.IMPORTANT: When installing wheels,point extended hub of wheels towardwheel support frame (see Figure 3).2. Place cap nuts on axle ends. Gently tapwith hammer to secure.3. Place heater on wheel support frame.For D20H model, make sure outlet end(front) of heater is over wheels. ForD30H and D44H models, make sure airinlet end (rear) of heater is over wheels.Line up holes on fuel tank flange withholes on wheel support frame.4. For D20H model, place rear handle ontop of fuel tank flange. For D30H andD44H models, place front handle andrear handle on top of fuel tank flange.Insert screws through handle(s), fueltank flange, and wheel support frame.Attach nut finger tight after each screwis inserted.5. After all screws are inserted, tightennuts firmly.Figure 3 - Wheel and Handle AssemblyHandleSleeve Cap ScrewHot AirOutletAirInletWheel SupportFrameWheelFuelTankFlangeCap NutNut ExtendedHubAxleScrewWheelSupportFrameWheelCap NutNutExtendedHubFrontHandleAxleRearHandleAirInletFuelTankFlangeHot AirOutletD20H ModelVENTILATIONWARNING: Follow the mini-mum fresh, outside air ventilationrequirements. If proper fresh, out-side air ventilation is not provided,carbon monoxide poisoning canoccur. Provide proper fresh, out-side air ventilation before runningheater.D30H and D44H ModelsProvide a fresh air opening of at least 2800square cm (three square feet) for each100,000 Btu/Hr rating. Provide extra freshair if more heaters are being used.Example: A 150,000 Btu/Hr heater requiresone of the following:• a two-car garage door [4.9 m (16 ft.) open-ing] raised 9 cm (3.5 inches)• a single-car garage door [2.75 m (9 ft.)opening] raised 15.25 cm (6 inches)• two, 76 cm (30 inch) windows raised 28cm (11 inches)