Bryant 355BAV Installation, Start-Up, And Operating Instructions Manual page 15

WARNING
!
FIRE OR EXPLOSION HAZARD
Failure to follow this warning could result in fire, explosion,
personal injury, or death.
- - Connect gas pipe to furnace using a backup wrench to
avoid damaging gas controls.
- - Gas valve shutoff switch MUST be facing forward or
tilted upward.
- - Never purge a gas line into a combustion chamber.
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.
- - Use proper length of pipe to avoid stress on gas
control manifold.
- - If a flexible connector is required or allowed by
authority having jurisdiction, black iron pipe shall be
installed at furnace gas valve and extend a minimum
of 2 in. (51 mm) outside furnace casing.
- -Protect gas valve from water and debris. Gas valve
inlet and/or inlet piping must remain capped until gas
supply line is permanently installed to protect the valve
from moisture and debris. Also, install a sediment trap
in the gas supply piping at the inlet to the gas valve.
Install a sediment trap in riser leading to furnace. Trap can be
installed by connecting a tee to riser leading to furnace so
straight- -through section of tee is vertical. Then connect a capped
nipple into lower end of tee. Capped nipple should extend below
level of gas controls. Place a ground joint union between gas
control manifold and manual gas shutoff valve. (See Fig. 17.)
An accessible manual shutoff valve MUST be installed external to
furnace casing and within 6 ft. (1.8 M) of furnace. A 1/8 in. (3
mm). NPT plugged tapping, accessible for test gauge connection,
MUST be installed immediately upstream of gas supply connection
to furnace and downstream of manual shutoff valve.
Gas line grommet (factory- -supplied loose parts bag) should be
used when installing gas piping. Gas line entry hole filler plug
should be installed in unused gas line entry hole. (See Fig. 18.)
COMBUSTION
-AIR PIPE
VENT PIPE
COMBUSTION-AIR PIPE GROMMET
GAS LINE
GAS LINE GROMMET
VENT PIPE GROMMET
NOTE: PIPE GROMMETS AND ENTRY HOLE FILLER
PLUGS ARE INCLUDED IN FACTORY-SUPPLIED
LOOSE PARTS BAG
Fig. 18 - - Casing Pipe Grommets
FRONT FILLER
PANEL
Fig. 16 - - Removing Bottom Closure Panel
GAS
SUPPLY
MANUAL
SHUTOFF
VALVE
(REQUIRED)
SEDIMENT
TRAP
UNION
Fig. 17 - - Typical Gas Pipe Arrangement
UNUSED 1-3/4 -IN. (44 mm)
DIAMETER GAS
CONN. HOLE
GAS LINE ENTRY
HOLE FILLER PLUG
15
BOTTOM
CLOSURE
PANEL
A93047
A93324
A05057