Theory Of Operation; Propane Supply; Installation - Desa 55-F Manuel D'utilisation

tHeory oF oPeration

The hose/regulator assem-
The Fuel System:
bly attaches to the propane gas supply. The
propane gas moves through the automatic
control valve and out the nozzle.
The motor turns the fan. The
The Air System:
fan pushes air into and around the combus-
tion chamber. This air is heated and provides
a stream of clean, hot air.
Combustion Chamber
Clean
Heated
Air Out
(Front)
Figure 2 - Cross Section Operational View (Heater may vary from illustration)

ProPane suPPLy

Propane gas and propane tank(s) are to be
furnished by the user.
Use this heater only with a propane vapor
withdrawal supply system. See Chapter 5
of the Standard for Storage and Handling of
Liquefied Petroleum Gas, ANSI/NFPA 58.
Your local library or fire department will have
this booklet.
The amount of propane gas ready for use
from propane tanks varies. Two factors decide
this amount:
1. The amount of propane gas in tank(s)
2. The temperature of tank(s)
The chart below shows the number of 100 lb
(45 kg) tanks needed to run this heater.
Temperature
at tank location
above 20° F (-7° C)
20° F (-7° C) to -0 (-18° C) 1
below -0° F (-18° C)
Smaller tanks can be used for limited run
times but it is recommended to use larger
tanks for optimum performance.
4
Air For Combustion
And Heating
Number of tanks
Models
55 85 125
1 1 2
2 3
2 2 (Use larger
tank)
www.desatech.com
The Ignition System:
and spark plug lights the main burner
The Safety Control System:
causes the heater to shut down if the flame
goes out.
Note: Some parts are located differently on
some models.
Nozzle
Fan
Fuel
Less gas is vaporized at lower temperatures.
You may need two or more 100 pound (45 kg)
tanks or one larger tank in colder weather. Your
local propane gas dealer will help you select
the proper supply system. The minimum sur-
rounding-air temperature rating for each heater
is -20° F (-29° C).

instaLLation

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.
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.
The spark transformer
This system
Motor
Cool
Air In
(Back)
Power Cord
Hose/Regulator
Assembly
113893-01C