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506488-01 Page 7Issue 1008
The gas supply line should be routed through the grommet
on the side of the unit. Refer to Figure 7 to locate this access
opening.
If local codes allow the use of a flexible gas appliance
connector, always use a new listed connector. Do not use a
connector which has previously serviced another gas
appliance.
The furnace must be isolated from the gas supply piping
system by closing the individual manual shutoff valve during
any pressure testing of the gas supply piping system at test
pressure equal to or less than 1/2 psig (3.5 kPa) or 14" W.C.
If the piping system is to be tested at pressures in excess of
1/2 psig (3.5 kPa), the furnace and its appliance main gas
valve must be disconnected from the gas supply piping
system.
After gas piping is complete, carefully check all piping
connections (factory and field) for gas leaks. Use a leak
detecting solution or other preferred means. Some soaps
used for leak detection are corrosive to certain metals.
Carefully rinse piping thoroughly after leak detection has
been completed.
Pipe connections must be tight, and a non-hardening pipe
compound resistant to liquefied petroleum gases should be
used.
Install a manual shutoff valve in the gas connection to the
unit, external to the casing, in accordance with local codes.
An 1/8" NPT plugged tapping, accessible for test gauge
connection, must be installed immediately upstream of the
gas supply connection to the unit. A sediment trap (drip leg)
shall be installed as close as practical to the gas supply inlet
of the unit.
LPG/Propane Units, Tanks, and Piping
Units are shipped equipped for natural gas, but can be
converted to LPG/propane in the field by an approved
licensed technician.
All LPG/propane gas equipment must conform to the safety
standards of the National Fire Protection Association.
For satisfactory operation, LPG/propane gas pressure must
be a minimum of 11" W.C. at the unit under full load.
Complete information regarding tank sizing for vaporization,
recommended regulator settings, and pipe sizing is available
from most regulator manufacturers and LPG/propane gas
suppliers.
Table 2
Minimum Required Surface Area
for Disposable Filters
gnilooClanimoN
aerAretliF
).tf.qs(
000,4276.2
000,03 33.3
000,6300.4
000,24 76.4
000,8433.5
000,06 76.6
Figure 7
Gas Line Entry
Thermostat
Entry
Line Voltage
Entry
Gas and Electrical Access
The gas valve supplied with this furnace is rated at 1/2
psig maximum. Any higher pressure may rupture the
pressure regulator diaphragm and may cause overfiring
of the burners and improper burner operation. The
overfiring may result in the creation of carbon monoxide
which could cause asphyxiation.
WARNING
Failure to follow the safety warnings exactly could result
in serious injury, death, or property damage.
Never test for gas leaks with an open flame. Use a
commercially available soap solution made specifically
for the detection of leaks to check all connections. A fire
or explosion may result causing property damage,
personal injury, or loss of life.
WARNING
FIRE OR EXPLOSION HAZARD