Electrical Connections; 115-V Wiring - Bryant 352MAV Installation, Start-Up, And Operating Instructions Manual

GAS
SUPPLY
MANUAL
SHUTOFF
VALVE
(REQUIRED)
SEDIMENT
TRAP
UNION
Fig. 26—Typical Gas Pipe Arrangement
→
WARNING: FIRE OR EXPLOSION HAZARD
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, per-
sonal injury or loss of life.
An accessible manual shutoff valve MUST be installed external to
furnace casing and within 6 ft of furnace. A 1/8-in. NPT plugged
tapping, accessible for test gage connection, MUST be installed
immediately upstream of gas supply connection to furnace and
downstream of manual shutoff valve.
Piping should be pressure and leak tested in accordance with local
and NFGC, national plumbing and gas codes before the furnace
has been connected. In Canada, refer to current edition of
NSCNGPIC. If the pressure exceeds 0.5 psig (14-in. wc), 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 located on gas valve
before test. 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.
NOTE: The gas valve inlet press tap connection is suitable to use
as test gage connection providing test pressure DOES NOT exceed
maximum 0.5 psig (14-in. wc) stated on gas valve. (See Fig. 53.)
Piping should be pressure tested in accordance with NFGC local
and national plumbing and gas codes before furnace is attached. In
Canada, refer to current edition of NSCNGPIC.
→
The gas supply pressure shall be within the maximum and
minimum inlet supply pressures marked on the rating plate with
the furnace burners ON at HI-HEAT and OFF.
VIII. ELECTRICAL CONNECTIONS
See Fig. 27 and 28 for field wiring diagram showing typical field
115-v and 24-v wiring. Check all factory and field electrical
connections for tightness.
WARNING: Blower access door switch opens 115-v
power to furnace control. No component operation can
occur. Do not bypass or close switch with panel removed.
Failure to follow this warning could result in personal
injury or death.
→
Field-supplied wiring shall conform with the limitations of 63
degrees F rise.
CAUTION: Furnace control must be grounded for
proper operation or control will lock out. Control is
grounded through green/yellow wire routed to gas valve
C-terminal and burner box screw.
A. 115-V Wiring
A93324
Before proceeding with electrical connections, make certain that
voltage, frequency, and phase correspond to that specified on the
furnace rating plate. Also, check to be sure that service provided
by utility is sufficient to handle load imposed by this equipment.
Refer to rating plate or Table 4 for equipment electrical specifi-
cations.
For U.S. installations, make all electrical connections in accor-
dance with National Electrical Code (NEC) ANSI/NFPA 70-2002
and any local codes or ordinances that might apply. For Canadian
installations, all electrical connections must be made in accordance
with Canadian Electrical Code CSA C22.1 or authorities having
jurisdiction.
Use a separate branch electrical circuit containing a properly sized
fuse or circuit breaker for this furnace. See Table 4 for wire size
and fuse specifications. A disconnecting means must be located
within sight from and readily accessible to furnace.
NOTE: Proper polarity must be maintained for 115-v wiring. If
polarity is incorrect, control LED status indicator light will flash
rapidly and furnace will NOT operate.
CAUTION: Do not connect aluminum wire between
disconnect switch and furnace. Use only copper wire.
(See Fig. 29.)
WARNING: The furnace casing MUST have an unin-
terrupted or unbroken ground according to NEC
ANSI/NFPA 70-2002 and Canadian Electrical Code CSA
C22.1 or local codes to minimize personal injury if an
electrical fault should occur. This may consist of electri-
cal wire or conduit approved for electrical ground when
installed in accordance with existing electrical codes. Do
not use gas piping as an electrical ground. Failure to
follow this warning could result in electrical shock, fire,
or death.
J-BOX RELOCATION
1. Remove 2 screws holding auxiliary J-box. (See Fig. 30.)
2. Rotate J-box 180° and attach box to left side, using holes
provided.
CAUTION: If manual disconnect switch is to be
mounted on furnace, select a location where a drill or
fastener will not contact electrical or gas components.
—19—