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The hose/regulator assembly attaches to the propane gas supply. The propane gas
The Fuel System:
moves through the solenoid valve and out the nozzle.
The motor turns the fan. The fan pushes air into and around the combustion chamber.
The Air System:
This air is heated and provides a stream of clean, hot air.
The direct spark ignitor (DSI) sends voltage to the ignitor. The ignitor ignites
The Ignition System:
the fuel and air mixture.
The Safety Control System:
motor will continue to run, but no heat is produced.
Combustion Chamber
Figure 2 - Cross Section Operational View
PROPANE 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
Installation Code CAN/CGA B149.2. Your lo-
cal library or fire department 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)
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
at tank location
40° F (5° C) and above
Below 40° F (5° C)
4
THEORY OF OPERATION
This system causes the heater to shut down if the flame goes out. The
DSI
Solenoid Valve
Nozzle
Air For Combustion
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 sur-
rounding air temperature rating for each heater
is -20°F (-7° C).
Provide a fresh air opening of at least three square
feet for each 100,000 Btu/Hr (105,500 k/j) rating.
Number
This heater requires a fresh air opening of at least
of tanks
11.25 square feet (1.05 m
2
if more heaters are being used.
(Use larger tank)
www.desatech.com
Ignitor
Fan
Motor
Air For Heating
VENTILATION
WARNING: Follow the mini-
mum fresh, outside air ventila-
tion requirements. If proper
fresh, outside air ventilation is
not provided, carbon monoxide
poisoning can occur. Provide
proper fresh, outside air ventila-
tion before running heater.
). Provide extra fresh air
2
Cool
Air In
(Back)
Power Cord
Hose/
Regulator
Assembly
116699-01B
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