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111167-01C
4
For more information, visit www.desatech.com
For more information, visit www.desatech.com
Figure 4 - Cross Section Operational View
THEORY OF OPERATION
FUELS
VENTILATION
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 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 combus-
tion chamber.
The Flame-Out Control System: This system causes the heater to
shut down if the flame goes out.
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 require-
ments must be followed to avoid risks associated
with carbon monoxide poisoning. Make certain these
requirements are met prior to operating heater.
Example:
A 58.6kw (200,000 Btu/Hr) heater requires one of the
following:
• a two-car garage door [4.88 meter (16 feet) opening] raised
12.7 cm (5 inches)
• a single-car garage door [2.74 meter (9 feet) opening] raised
20.3 cm (8 inches)
• two, 76.2 cm (30 inch) windows raised 38.1 cm (15 inches)
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
Motor
Ignition Control
Assembly
Air For Fuel System
Air For Combustion
And Heating
Fuel
Nozzle
Fuel
Tank
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. For-
eign matter such as rust, dirt, or water will cause the ignition control
assembly to shut down heater. Foreign matter may also require
heater's fuel system to be frequently cleaned.
WARNING: Use only kerosene, #1/#2 diesel/fuel
oil, JET A or JP-8 fuels to avoid risk of fire or explo-
sion. Never use gasoline, oil drained from crank-
cases, naphtha, paint thinners, alcohol or other highly
flammable fuels.