5
104042
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 Flame-Out 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.
Fan
Combustion
Chamber
Spark
Plug
Burner
Head
Solenoid
Valve
Motor
Cool
Air In
Fuel
Filter
Fuel
Pickup
Line
Electronic Ignitor
Fuel Tank
Nozzle
Fuel Pump/
Fuel Filter
Fuel
Air for Combustion
and Heating
Figure 2 - Cross Section Operational View
Fuel Line To
Solenoid Valve
!
WARNING
Follow the minimum fresh, outside air ventilation requirements.
If proper fresh, outside air ventilation is not provided, carbon
monoxide poisoning can occur. Provide proper fresh, outside air
ventilation before running heater.
VENTILATION
Fresh Air Opening Requirements
Heater Size
Square Feet Opening
350,000 Btu/Hr
10.5
Note:
If you use more than one heater, provide extra fresh air. Provide a fresh air
opening of at least three square feet for each 100,000 Btu/Hr rating.
Clean
Heated
Air Out
