Desa RLP155AT - Manual (Page 4)

www.desatech.com 113855-01A 4
INSTALLATION
WARNING: Review and under-
stand 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
installation 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.
1. Provide propane supply system (see Propane
Supply).
2. Connect POL fitting on hose/regulator as-
sembly to propane tank(s). Turn POL fitting
counterclockwise into threads on tank. Tighten
firmly using wrench. IMPORTANT: Position
regulator so that hose leaving the regulator is
in a horizontal position (see Figure 3, page 5).
This places the regulator vent in the proper
position to protect it from the weather.
Figure 2 - Cross Section Operational View
Air For Combustion Air For Heating
Clean Heated
Air Out (Front)
Fan
Motor
Cool
Air In
(Back)
Combustion
Chamber
Hose/Regulator
Assembly
THEORY OF OPERATION
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.
PROPANE SUPPLY
Propane gas and propane tank(s) are to be fur-
nished 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 (9 kg) propane tank. You may need two
or more tanks or one larger tank in colder weather.
It is recommended you use a 100-pound (45 kg)
tank for longer operation. See chart below. Less
gas is vaporized at lower temperatures. Your local
propane gas dealer will help you select the proper
supply system. The minimum surrounding air tem-
perature rating for each heater is -0°F (-18°C).
Average Temp °F (°C)
No. Of Tanks
At Tank Location 100-pound (45 kg)
0°(-18°) to 40°(4°) 1
Below 0°(-18°) 2