L.B. White 400 Tradesman Portable Forced Air - Manual (Page 9)

Assemble handle to four holes at barrel top as shown
in Fig.1. Tighten screws securely. FIG. 1
HANDLE ASSEMBLY
8
13. The heater must be installed so as not to interfere
with or obstruct normal exits, emergency exits, doors
and walkways.
14. Railing, fencing or suitable substitute materials must
be used to keep the heating equipment from any
people using and visiting the structure.
15 . Eventually, like all electrical/mechanical devices, the
thermostat can fail. Thermostat failure may result in
an underheating condition. The thermostat should be
tested to make sure it turns the heater on and off
within a temperature differential of ±3°F.
16. Take time to understand how to operate and maintain
the heater by using this Owner’s Manual. Make sure
you know how to shut off the gas supply to the
building and also to the individual heater. Contact
your fuel gas supplier if you have any questions.
17. Any defects found in performing any of the service or
maintenance procedures must be eliminated and
defective parts replaced immediately. The heater
must be retested by properly qualified ser vice
personnel before placing the heater back into use.
PROPANE GAS SUPPLY SIZING
The vaporization of propane is affected by several factors:
the sur face area of the container, the liquid level of
propane, temperature surrounding the container, and the
relative humidity. All of these factors are specific to a site.
Therefore, a degree of experience and judgement is
required to select the proper propane supply.
Although experience is the best guide, the following
recommendations can be used as a starting point. The
table is based on experience in northern climates where
cold weather and high humidity are prevalent in the winter.
If more or less favorable conditions prevail at a specific site,
adjustments can be made on the basis of experience.
Recommended Gas Supply
Propane Supply Tank: Heater(s)/Container(s):
500 gallon 1 heater per tank
1,000 gallon 2 heaters per tank
If more than one gas supply container is used per heater,
the containers must be manifolded together to allow vapor
withdrawal simultaneously from multiple containers.
Manifold system shall be in accordance with NFPA 58.