Desa BC40 Guide Du Propriétaire page 5

THEORY OF OPERATION
The air pump forces air through
The Fuel System:
the air line. The air is then pushed through the
nozzle. This air causes fuel to be lifted from the
tank. A fine mist of fuel is sprayed into the com-
bustion chamber.
The motor turns the fan. The
The Air System:
fan pushes air into and around the combustion
Combustion Chamber
Clean
Heated
Air Out
Fuel Tank
FUELS
WARNING: Use only kero-
sene, #1/#2 diesel/fuel oil, JET
A or JP-8 fuels to avoid risk
of fire or explosion. Never
use gasoline, oil drained from
crankcases, naphtha, paint
thinners, alcohol or other highly
flammable fuels.
Use only kerosene, #1/#2 diesel/fuel oil, JET A
or JP-8 fuels. Heavier fuels such as No. 2 fuel
oil or No. 2 diesel fuel may also be used but will
result in:
• noticeable odor
• additional fuel filter maintenance
• the need for nontoxic, anti-icer additives in very
cold weather
111168-01A
Nozzle
Air For Fuel
System
Figure 6 - Cross Section Operational View
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chamber. This air is heated and provides a stream
of clean, hot air.
The ignition control assembly provides power to
the ignitor. This ignites the fuel/air mixture in the
combustion chamber.
The Flame-Out Control System:
the heater to shut down if the flame goes out.
Ignitor
Air Line
Fuel
To Burner
Filter
Air For Combustion
And Heating
Do not use fuels heavier than No. 2 grade or
heavy oils such as oil drained from crankcases.
These heavy oils will not ignite properly and will
contaminate the heater.
IMPORTANT: Use a KEROSENE ONLY (blue)
or DIESEL ONLY (yellow) 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 heater. Foreign
matter may also require heater's fuel system to be
frequently cleaned.
This system causes
Air Pump
Motor
Air Intake
Fan
Filter
Cool
Air In
Ignition Control
Assembly
Fuel
Air
Output
Filter
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