Theory Of Operation; To Start Heater; To Stop Heater - Desa D20H Owner's Manual

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 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 control assembly provides
power to the ignitor. This ignites the fuel/air
mixture in the combustion chamber.
The Flame-Out Control System
This system causes the heater to shut down
if the flame goes out.
Combustion Chamber
Clean
Heated
Air Out
Nozzle
Fuel
Tank
Air For Fuel System
Figure 4 - Cross Section Operational View
105843
OPERATION
WARNING: Review and un-
derstand the warnings in the
Safety Information section, page
2. They are needed to safely op-
erate this heater. Follow all local
codes when using this heater.

TO START HEATER

1. Follow all ventilation and safety infor-
mation.
2. Fill fuel tank with kerosene or No. 1
fuel oil.
3. Attach fuel cap.
4. Plug power cord of heater into standard
230 volt/50 hertz, grounded (earthed)
outlet. Use an extension cord if needed.
Use only a three-prong, grounded
(earthed) extension cord.
Motor
Ignitor
Fan
Fuel
Air Line
Filter
To Burner
Air For Combustion
And Heating
OWNER'S MANUAL
Extension Cord Wire Size
Requirements
Up to 30.5 meters (100 feet) long, use 1.0
mm
30.6 to 61 meters (101 to 200 feet) long, use
1.5 mm
Push ON/OFF switch to ON (|) position and
heater should start in 5 seconds. If heater
does not start, see Troubleshooting (page 7).

TO STOP HEATER

1.
TO RESET HEATER
1.
2. Repeat steps under To Start Heater.
Air Pump
Air Intake
Filter
Cool
Air
In
Figure 5 - ON/OFF Switch, D20H Model
Air
Output
Filter
Ignition Control
Assembly
Fuel
Figure 6 - ON/OFF Switch, D30H and
D44H Models
5
2
(16 AWG) conductor
2
(14 AWG) conductor
Push ON/OFF switch to OFF (O)
position.
Push ON/OFF switch to OFF (O) posi-
tion and wait 10 seconds (2 minutes if
heater has been running).
|
ON/OFF Switch
O
|
ON/OFF Switch
O