Theory Of Operation; Fuels - Desa 20 Owner's Manual

THEORY OF
OPERATION

FUELS

6
The Fuel System: The air pump forces air through the air line. The air is then
pushed through the burner head 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 electronic ignitor sends voltage to the spark plug.
The spark plug ignites the fuel and air mixture.
The Flame-Out Control System: This system causes the heater to shut down
if the flame goes out.
Combustion
Chamber
Clean
Heated
Air Out
Fuel
Nozzle
Tank
Air For Fuel
System
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
• carbon build up on spark plug
• use of non-toxic anti-icer in fuel during very cold weather
IMPORTANT: Use a KEROSENE ONLY container. Be sure storage container is
clean. Foreign matter such as rust, dirt, or water will cause the flame-out control to
shut down heater. Foreign matter may also require you to clean fuel system often.
Spark
Plug
Fuel
Filter
Figure 5 - Cross Section Operational View
WARNING
WARNING ICON G 001
Motor
Burner
Fan
Head
Air line
To Burner
Air For Combustion
And Heating
Air Pump
Intake
Air
Filter
Cool
Air
In
Output
Air
Filter
Electronic
Ignitor
Fuel
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