Theory Of Operation; Propane Supply - Desa BLP155AT Owner's Manual

THEORY OF
OPERATION
PROPANE
SUPPLY
100585
The Fuel System: The hose/regulator assembly attaches to the propane gas
supply. This provides fuel to the heater.
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 piezo ignitor lights the burner.
The Automatic Control System: This system causes the heater to shut down
if the flame goes out.
Clean
Heated
Air Out
(Front)
Air For Combustion
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 and or CAN/CGA B149.2. 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)
This heater is designed to operate with a minimum 20-pound propane tank. You
may need two or more tanks or one larger tank in colder weather. Use a 100-pound
tank for longer operation or in very cold weather. Less gas is vaporized at lower
temperatures. Your local propane gas dealer will help you select the proper supply
system. The minimum surrounding air temperature rating for each heater is -20 F
(-29 C).
Average Temperature ( F)
At Tank Location
Number Of Tanks
(100-pound)
Combustion
Chamber
Figure 2 - Cross Section Operational View
40 32
1 1
Fan
Motor
Hose/Regulator
Assembly
Air For Heating
20 10 0 -10
1 1 1 2
Cool Air In
(Back)
-20
2
5