103018
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For more information, visit www.desatech.com
For more information, visit www.desatech.com
Air For Combustion Air For Heating
THEORY OF OPERATION
The Fuel System: The hose/regulator assembly attaches to the
propane gas supply. The propane gas moves through the solenoid
valve and out the nozzle.
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 direct spark ignitor (DSI) sends voltage
to the ignitor. The ignitor ignites the fuel and air mixture.
The Safety Control System: This system causes the heater to shut
down if the flame goes out. The motor will continue to run, but no
heat is produced.
Cool
Air In
(Back)
Motor
Nozzle
Clean
Heated
Air Out
(Front)
Power
Cord
Hose/
Regulator
Assembly
Solenoid
Valve
Ignitor
Combustion
Chamber
DSI
Figure 2 - Cross Section Operational View
Fan
THEORY OF OPERATION
PROPANE/LP SUPPLY
VENTILATION
INSTALLATION
PROPANE/LP SUPPLY
Propane/LP gas and propane/LP tank(s) are to be furnished by the user.
Use this heater only with a propane/LP vapor withdrawal supply
system. See Chapter 5 of the Standard for Storage and Handling of
Liquefied Petroleum Gas, ANSI/NFPA 58 and the Propane Instal-
lation Code CAN/CGA B149.2. Your local library or fire depart-
ment will have these booklets.
The amount of propane/LP gas ready for use from propane/LP tanks
varies. Two factors decide this amount:
1. The amount of propane/LP gas in the tank(s)
2. The temperature of tank(s)
VENTILATION
Provide at least three square feet of fresh, outside air for each
100,000 Btu/Hr of rating. This heater requires a fresh air opening of
at least 11.25 square feet. Provide extra fresh air if more heaters are
being used.
WARNING: Follow the minimum fresh, outside air
ventilation requirements. If proper fresh, outside air
ventilation is not provided, carbon monoxide poison-
ing can occur. Provide proper fresh, outside air ven-
tilation before running heater.
The chart below shows the number of 100-pound tanks needed to
run this heater.
Do not operate this product with any tank smaller than 100 pounds.
Temperature (°F) At Tank
40° 32° 20° 0° -10° -20°
Number of tanks 3 (Use larger tank below 40°F)
Less gas is vaporized at lower temperatures. You may need a larger
tank in colder weather. Your local propane/LP gas dealer will help
you select the proper supply system. The minimum surrounding air
temperature rating for each heater is -20°F.
INSTALLATION
1. Provide propane/LP supply system (see Propane/LP Supply).
2. Connect POL fitting on hose/regulator assembly to propane/LP
tank(s). Turn POL fitting counterclockwise into threads on tank.
Tighten firmly using a wrench.
IMPORTANT:
Tighten regula-
tor with black adjustment knob pointing down. Pointing adjust-
ment knob down protects regulator from weather damage.
3. Connect hose to inlet connector. Tighten firmly using a wrench.
IMPORTANT:
Extra hose or piping may be used if needed.
Install extra hose or piping between hose/regulator assembly
and propane/LP tank. You must use the regulator supplied with
the heater.
WARNING: Review and understand the warnings
in the
Safety Information
section, page 2. They are
needed to safely operate this heater. Follow all local
codes when using this heater.
WARNING: Test all gas piping and connections
for leaks after installing or servicing. Never use an
open flame to check for a leak. Apply a mixture of
liquid soap and water to all joints. Bubbles forming
show a leak. Correct all leaks at once.
