Desa BV125EDI - Manual (Page 6)

6
THEORY CUTAWAY 125 EURO
THEORY OF
OPERATION
WARNING !
FUELS
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.
Clean
Heated
Air Out
Cool
Air
In
Output
Air
Filter
Figure 3 - Cross Section Operational View
Spark
Plug
Burner
Head
Fan
Motor Air Pump
Intake
Air Filter
Nozzle
Heat Exchanger
Outer Shell
Exhaust Gases
Outlet
Exhaust gases cross over
from combustion chamber
to heat exchanger
Fuel
Tank Air line
To Burner Electronic
Ignitor
Exhaust
Gases Air For Fuel
System Air For Combustion
And Heating Fuel
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.
Exhaust gases are ducted out of the heater through a vent pipe. The user must
supply the vent pipe.
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.
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
• the need of non-toxic anti-icer in fuel during 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 flame-
out control to shut down heater. Foreign matter may also require you to clean fuel
system often.