Desa B70D - Manual (Page 3)

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OWNER’S MANUAL
Figure 2 - Cross Section Operational View
Clean
Heated
Air Out
Figure 1 - 70,000 Btu/Hr
Handle
Fuel Cap
Lower Shell
Power Cord
Fuel Tank
Hot Air Outlet
Air Filter
End Cover
Fan Guard
Upper Shell
Side Cover
Ignition Control Assembly
(assembly on inside of side cover)
UNPACKING
1. Remove all packing items applied to
heater for shipment.
2. Remove all items from carton.
3. Check items for shipping damage. If
heater is damaged, promptly inform
dealer where you bought heater.
PRODUCT IDENTIFICATION
The Fuel System: The air pump forces
air through the air line. The air is then
pushed through the 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.
The Ignition System: The ignition con-
trol assembly provides power to the ignitor.
This ignites the fuel/air mixture in the com-
bustion chamber.
The Flame-Out Control System: This
system causes the heater to shut down if the
flame goes out.
Fuel
Filter Air Line
To Burner
Air
Output
Filter
Air Pump
Air Intake
Filter
Cool
Air In
Fan
Combustion Chamber
Ignitor
Motor
Ignition Control
Assembly
Air For Fuel System
Air For Combustion
And Heating
Fuel
Nozzle Fuel
Tank
THEORY OF OPERATION