Desa and 55 owner manual Product Identification, Theory Of Operation, Fuels, Ventilation

OWNER’S MANUAL

PRODUCT IDENTIFICATION

Hot Air Outlet Handle

Upper Shell

Lower Shell

Fan Guard

Air Filter

End Cover

Fuel Tank

Fuel Cap

Side Cover

Ignition Control Assembly (assembly on inside of side cover)

Power Cord

Figure 1 - 55,000 Btu/Hr Model Shown

THEORY OF OPERATION

FUELS

WARNING: Use only kerosene or No. 1 fuel oil to avoid risk of fire or explosion. Never use gasoline, naphtha, paint thinners, alcohol, or other highly flammable fuels.

Do not use heavy fuels such as No. 2 fuel oil or No. 2 Diesel. Using heavy fuels will result in:

•clogged fuel filter and nozzle

•the need of nontoxic anti-icer in fuel dur- ing very cold weather

IMPORTANT: Use a KEROSENE ONLY storage container. Be sure storage container is clean. Foreign matter such as rust, dirt, or water will cause the ignition control assembly to shut down the heater. Foreign matter may also require you to clean fuel system often.

VENTILATION

The Fuel System: The air pump forces air through the air line. The air is then pushed through the nozzle. This air causes fuel to lift from the tank. A fine mist of fuel is sprayed into the combustion chamber.

The Air System: The motor turns the fan. The fan pushes air into and around the combustion chamber. This air is heated and provides a stream of clean, hot air.

The Ignition System: The ignition con- trol assembly provides power to the ignitor. This ignites the fuel/air mixture in the com- bustion chamber.

The Flame-Out Control System: This system causes the heater to shut down if the flame goes out.

WARNING: Follow the mini- mum fresh, outside air ventila- tion requirements. If proper fresh, outside air ventilation is not pro- vided, carbon monoxide poison- ing can occur. Provide proper fresh, outside air ventilation be- fore running heater.

	Combustion Chamber	Ignitor	Motor	Air Pump
			Fan	Air Intake
				Filter
Clean				Cool
Heated
				Air In
Air Out
				Air
				Output
				Filter
	Nozzle		Air Line	Ignition
Fuel		Fuel		Control
Tank		Filter	To Burner	Assembly
	Air For Fuel		Air For Combustion	Fuel
	System		And Heating

Figure 2 - Cross Section Operational View

Provide at least a two-square-foot opening of fresh, outside air for each 55,000 Btu/Hr rating. Provide extra fresh air if more heat- ers are being used.

Example: A 55,000 Btu/Hr heater requires one of the following:

•a two-car garage door (16-feet-wide opening) raised 1 1/2 inches

•a single-car garage door (9-feet-wide opening) raised 2 1/2 inches

•two windows (30-inches-wide opening) raised 4 1/2 inches

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