Form 41357040
Rev Jan 2010
7
SECTION 7: INFORMATION FOR LP GAS FLOOR MODEL HEATERS ONLY
Heaters used with LP gas must be installed in accordance with the
latest edition of the National Fuel Gas Code NFPA54, Standard for the Storage and Handling of LP Gas -
NFPA 58, all state and local codes or the authority having jurisdiction. See Section 7.1 “LP models only -
Regulator and hose assembly instructions” on page 8 for specific LP connection information.
RFPA10C Installation and Operation Instructions
The heater must be connected to the tank or cylinder by a UL Listed hose assembly or hard
piping. A 15 foot assembly of UL Listed hose is included with each heater from Space-Ray under Part No.
30522020. A single stage LP gas regulator (operation range: 10150 PSIG inlet and 11.0" W.C. outlet) having
a POL fitting with an excess flow valve is included with each hose assembly as Part No. 30524000 (LP
Cylinder Kit).
The hose assembly must be visually inspected prior to each use of the heater. If it is evident there is
excessive abrasion or wear, or the hose is cut, it must be replaced prior to the heater being
put into operation. The replacement hose must be a UL Listed hose assembly.
The volume of a given quantity of liquid LP gas in a container is directly related to its temperature. As a
result, the vaporization rate of a tank or cylinder will decrease as the temperature drops and
as the percentage of liquid in the container becomes smaller. Table 5 on page
7 shows the approximate vaporization rate of a 100 lb. cylinder.
Table 5: Maximum Continuous Flow in BTU/Hr. At Various Temperatures (Degrees F)
Lbs. of Propane in
Cylinder
20
o
F
40
o
F
60
o
F
70
o
F
100
167,000
214,000
277,000
300,000
80
137,000
180,000
214,000
236,000
60
109,000
140,000
176,000
197,000
40
**
105,000
131,000
141,000
30
**
**
107,000
118,000
** Rate of vaporization drops below the heater input rate.
WARNING: Due to the continuous length of time the heater might be in operation, a 100
lb. LP gas cylinder may not be suf-
ficient in size. Manifolding several cylinders together is a practical way of increasing the time of operation of t
hese heaters. Operation of the heater with insufficient sized cylinders or when the liquid level
becomes too low will result in poor heater performance and can cause sooting. Consult your
LP gas dealer for proper sizing of container.
Always turn the gas off at the tank or cylinder when the heater
is not in use. When in operation, keep the heater a safe dis-
tance from the LP gas container and combustible materials as indicated on the
heater and in the instructions. Fasten LP cylinders securely so they cannot be knocked over.
Summary of Contents for RFPA10C
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