Electrical Connections; 115-V Wiring - Bryant 330AAV B Series Installation, Start-Up, And Operating Instructions Manual

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Fig. 7—Leveling Leg Installation
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.
TABLE 4—MAXIMUM CAPACITY OF PIPE*
NOMINAL INTERNAL
IRON PIPE DIAMETER
SIZE (IN.) (IN.)
1/2 0.622
3/4 0.824
1 1.049
1-1/4 1.380 1400
1-1/2 1.610 2100
* Cubic ft of gas per hr for gas pressures of 0.5 psig (14-in. wc) or less, and a
supply line pressure drop of 0.5-in. wc (based on a 0.60 specific gravity gas).
Ref: Table 10-2, NFPA 54-1996.
Piping should be pressure tested in accordance with local and
national plumbing and gas codes before furnace has been attached.
If test pressure exceeds 0.5 psig (14-in. wc), the gas supply pipe
must be disconnected from the furnace and capped before pressure
test. If test pressure is equal to or less than 0.5 psig (14-in. wc),
turn OFF electric shutoff switch before test. (See Fig. 7.) It is
recommended that the ground joint union be loosened before
pressure testing. After all connections have been made, purge lines
and check for leakage with regulated gas supply pressure.
Install a sediment trap in riser leading to furnace. The trap can be
installed by connecting a tee to riser leading from the furnace.
Connect a capped nipple into lower end of the tee. The capped
nipple should extend below level of gas controls. (See Fig. 8.)
Apply joint compound (pipe dope) sparingly and only to male
threads of each joint. The compound must be resistant to action of
propane gas.
Install an accessible manual shutoff valve upstream of furnace gas
controls and within 72 in. of furnace. A 1/8-in. NPT plugged
tapping is provided on the gas valve for test gage connection.
Installation of an additional 1/8-in. NPT plugged tapping, acces-
sible for test gage connection, installed immediately upstream of
gas supply connection to furnace and downstream of manual
shutoff valve, is not required. Place ground joint union between
gas control manifold and manual shutoff valve.
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LENGTH OF PIPE (FT)
10 20 30 40 50
175 120 97 82 73
360 250 200 170 151
680 465 375 320 285
950 770 660 580
1460 1180 990 900
GAS
SUPPLY
MANUAL
SHUTOFF
VALVE
(REQUIRED)
SEDIMENT
TRAP
UNION
Fig. 8—Typical Gas Pipe Arrangement
WARNING: Use the proper length of pipes to avoid
stress on the gas control manifold. A failure to follow this
warning can cause a gas leak resulting in a fire, explosion,
personal injury, or death.
CAUTION: Use a backup wrench at the furnace gas
control when connecting the gas pipe to the furnace to
avoid damaging gas controls or manifold.
WARNING: Never purge a line into a combustion
chamber. Never use matches, candles, flame, or other
sources of ignition for the purpose of checking leakage.
Use a soap-and-water solution to check for leakage. A
failure to follow this warning can cause a fire, explosion,
personal injury, or death.
VI. ELECTRICAL CONNECTIONS
A. 115-v Wiring
Refer to 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.
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Make all electrical connections in accordance with the National
Electrical Code (NEC) ANSI/NFPA 70-1996 and local codes or
ordinances that might apply. For Canadian installations, all elec-
trical connections must be made in accordance with CSA C22.1
Canadian Electrical Code, or authorities having jurisdiction.
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