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THEORY OF
OPERATION
The Fuel System: The motor turns the fuel pump. The fuel pump pulls fuel from
the fuel tank. The fuel pump pushes fuel through a filter and a solenoid valve and out
the burner head nozzle. 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 Safety Control System: This system causes the heater to shut down if the
flame goes out. It also allows the fan to continue running after normal shutdown of
heater. This cools the combustion chamber.
Cool
Air In
Combustion
Chamber
Clean
Heated
Air Out
Burner
Head
Fuel
Filter
Air for Combustion
and Heating
Fuel
Figure 3 - Cross Section Operational View
Spark
Plug
Solenoid
Valve
Fan
Fuel Pump/
Fuel Filter
Motor
Fuel
Pickup
Line
Electronic
Ignitor
Nozzle
Fuel Tank
Fuel Line To
Solenoid Valve