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www.desatech.com
FUELS
WARNING: Use only kero-
sene, #1/#2 diesel/fuel oil, JET A
or JP-8 fuels to avoid risk of fire or
explosion. Never use gasoline, oil
drained from crankcases, naph-
tha, paint thinners, alcohol or
other highly flammable fuels.
Use only kerosene, #1/#2 diesel/fuel oil, JET A or
JP-8 fuels. Heavier fuels such as No. 2 fuel oil or No.
2 diesel fuel may also be used but will result in:
• noticeable odor
• additional fuel filter maintenance
• the need for nontoxic, anti-icer additives in very
cold weather
Do not use fuels heavier than No. 2 grade or
heavy oils such as oil drained from crankcases.
These heavy oils will not ignite properly and will
contaminate the heater.
IMPORTANT: Use a KEROSENE ONLY (blue) or
DIESEL ONLY (yellow) 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 heater. Foreign matter may also require
heaterʼs fuel system to be frequently cleaned.
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 be lifted from the tank. A fine mist of fuel is sprayed into the combus-
tion 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.
Figure 5 - Cross Section Operational View
Clean
Heated
Air Out
Fuel
Filter
Air Line
To Burner
Air Output Filter
Air Pump
Air Intake Filter
Cool Air In
Fan
Combustion Chamber
Ignitor
Ignition Control
Assembly
Air For Fuel
System
Air For
Combustion
And Heating
Fuel
Nozzle
Fuel
Tank
VENTILATION
WARNING: Provide a fresh air
opening of at least three square
feet (2,800 square cm) for each
100,000 Btu/hr rating. Provide
extra fresh air if more heaters
are being used. The minimum
ventilation requirements must
be followed to avoid risks as-
sociated with carbon monoxide
poisoning. Make certain these
requirements are met prior to
operating heater.
Example: A 200,000 Btu/Hr (58.6 kw) heater
requires one of the following:
• a two-car garage door [16 feet (4.88 meter)
opening] raised 5 inches (12.7 cm)
• a single-car garage door [9 feet (2.74 meter)
opening] raised 8 inches (20.3 cm)
• two, 30 inch (76.2 cm) windows raised 15 inches
(38.1 cm)
Motor