THEORY OF OPERATION

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 fi ne 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:

if the fl ame goes out.

Exhaust Gases

Outlet

Heat Exchanger

Outer Shell

This system causes the heater to shut down

Spark

 

 

 

Plug

Motor

Air Pump

Burner

Fan

Intake

 

Head

 

Air Filter

 

 

 

6

Clean

 

 

 

 

Cool

Heated

 

 

 

 

Air

Air Out

 

 

 

 

In

 

 

 

 

 

Output

Exhaust gases cross over

 

 

 

Air

 

 

 

Filter

from combustion chamber

 

 

 

 

 

 

 

to heat exchanger

 

 

 

 

 

Fuel

 

Air line

 

Electronic

 

Tank

Nozzle

To Burner

Ignitor

Exhaust

Air For Fuel

Air For Combustion

Fuel

 

 

THEORY CUTAWAY 125 EURO

 

 

 

Gases

System

And Heating

 

 

 

 

Figure 3 - Cross Section Operational View

 

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 fi lter 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.

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Desa BV125EDI owner manual Theory of Operation, Fuels