CAUTION:
If a flexible connector is required or al-
lowed by the authority having jurisdiction, black iron
pipe shall be installed at the gas valve and extend a
minimum of 2 in. outside the furnace casing.
Piping should be pressure tested in accordance with local and
national plumbing and gas codes before the furnace has been
attached. If the pressure exceeds 0.5 psig (14-in. wc), the gas
supply pipe must be disconnected from the furnace and capped
before the pressure test. If the test pressure is equal to or less than
0.5 psig (14-in. wc), close the manual shut-off valve located on the
gas valve before the test. It is recommended that the ground joint
union be loosened before pressure testing.
WARNING:
Never purge a line into a combustion
chamber. Never use matches, candles, flame, or other
sources of ignition to check for gas leakage. Use a
soap-and-water solution to check for gas leaks. Failure to
follow this warning could result in fire, explosion, per-
sonal injury, or death.
After all connections have been made, purge the lines and check
for gas leakage.
Install a sediment trap in the riser leading to the furnace. Connect
a capped nipple into the lower end of the tee. The capped nipple
should extend below the level of the gas controls. (See Fig. 8.)
Joint compounds (pipe dope) should be applied sparingly and only
to the male threads of the joints. This pipe dope must be resistant
to the action of propane gas.
Install an accessible manual shut-off valve upstream of the furnace
gas controls and within 72 in. of the furnace. A 1/8-in. NPT
plugged tapping, accessible for test gage connection, must be
installed immediately upstream of the gas supply connection to the
furnace and downstream of the manual shut-off valve. Place a
ground joint union between the gas control manifold and the
manual shut-off valve.
WARNING:
Use the proper length of pipes to avoid
stress on the gas control manifold. Failure to follow this
warning could result in a gas leak causing fire, explosion,
personal injury, or death.
CAUTION:
Connecting the gas pipe to the furnace using
a backup wrench to avoid damaging gas controls.
VI.
ELECTRICAL CONNECTIONS
A.
115-v Wiring
Refer to the unit rating plate or Table 5 for equipment electrical
requirements. The control system requires an earth ground for
proper operation.
CAUTION:
Do not connect aluminum wire between
disconnect switch and furnace. Use only copper wire.
WARNING:
The cabinet MUST have an uninterrupted
or unbroken ground according to National Electrical
Code ANSI/NFPA 70-1993 and Canadian Electrical
Code CSA C22.1 or local codes to minimize personal
injury if an electrical fault should occur. This may consist
of electrical wire or conduit approved for electrical
ground when installed in accordance with existing elec-
trical codes. Do not use gas piping as an electrical ground.
Make all electrical connections in accordance with the current
edition of the National Electrical Code ANSI/NFPA 70-1993 and
any local codes or ordinances that might apply. For Canadian
Fig. 7—Filter Positions
A88486
RETURN-AIR
PLENUM
AIRFLOW
ACCESS DOOR
INSTALLATION
POSITION
OF FILTERS
Fig. 8—Typical Gas Pipe Arrangement
A89414
GAS
SUPPLY
MANUAL
SHUTOFF
VALVE
SEDIMENT
TRAP
UNION
—6—
