Fuels; Ventilation; Theory Of Operation; Operation - Desa H.S.I. Series Owner's Manual

• FUELS

• VENTILATION

• THEORY OF OPERATION

• OPERATION

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 a clogged fuel filter and/or nozzle.
IMPORTANT: Use a KEROSENE ONLY
storage container. Be sure storage container is
clean. Foreign matter such as rust, dirt, or
water will cause the ignition control assembly
to shut down the heater. Foreign matter may
also require you to clean fuel system often.
VENTILATION
Follow the minimum fresh, out-
side 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.
Provide at least a three-square-foot opening
of fresh, outside air for each 100,000 Btu/Hr
rating. Provide extra fresh air if more heat-
ers are being used.
Example: A 200,000 Btu/Hr heater re-
quires one of the following:
• a two-car garage door (16 feet wide open-
ing) raised 5 inches
• a single-car garage door (9 feet wide
opening) raised 8 inches
• two 30 inch wide windows raised 15
inches
For more information, visit www.desatech.com
THEORY OF OPERATION
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.
Combustion Chamber
Clean
Heated
Air Out
Nozzle
Fuel
Tank
Air For Fuel System
Figure 3 - Cross Section Operational View
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
information.
2. Fill fuel tank with kerosene or No. 1
fuel oil.
3. Attach fuel cap.
4. Turn thermostat knob clockwise to the
HIGH position.
5. Plug power cord of heater into three-
prong, grounded extension cord. Exten-
sion cord must be at least six feet long.
4
The Ignition System:
assembly provides power to the ignitor.
This ignites the fuel/air mixture in the com-
bustion chamber.
The Flame-Out Control System:
tem causes the heater to shut down if the
flame goes out.
Motor
Ignitor
Fan
Fuel
Air Line
Filter
To Burner
Air For Combustion
And Heating
Extension Cord Wire Size
Requirements
• 6 to 10 feet long, use 18 AWG rated
cord
• 11 to 100 feet long, use 16 AWG
rated cord
• 101 to 200 feet long, use 14 AWG
rated cord
6. Plug extension cord into standard 120
volt/60 hertz, three-hole, grounded out-
let. Note: Ignitor will preheat for five
seconds then heater will start.
7. Adjust thermostat knob to the desired
setting.
Note: A cold heater may affect the thermo-
stat setting. This thermostat is a general-
heating control. It is not intended for preci-
sion temperature control. Adjust thermostat
until heater cycles at the desired setting.
The ignition control
This sys-
Air Pump
Air Intake
Filter
Cool
Air
In
Air
Output
Filter
Ignition Control
Assembly
Fuel
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