115-V Wiring - Bryant 345MAV Installation, Start-Up, And Operating Instructions Manual

VOLTS—
UNIT
HERTZ—
SIZE
PHASE
024040 115—60—1
036040 115—60—1
024060 115—60—1
036060 115—60—1
048060 115—60—1
036080 115—60—1
048080 115—60—1
060080 115—60—1
048100 115—60—1
060100 115—60—1
060120 115—60—1
* Permissible limits of voltage range at which unit will operate satisfactorily.
† Unit ampacity = 125 percent of largest operating component's full load amps plus 100 percent of all other potential operating components' (EAC, humidifier, etc.) full load
amps.
‡ Length shown is as measured 1 way along wire path between unit and service panel for maximum 2 percent voltage drop.
** Time-delay type is recommended.
WARNING: Blower access door switch opens 115-v
power to control center. 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.
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
and burner box screw. Failure to follow this caution will
result in intermittent unit operation.
A. 115-v Wiring
Before proceeding with electrical connections, make certain that
voltage, frequency, and phase correspond to that specified on
furnace rating plate. Also, check to be sure that service provided
by power supply is sufficient to handle load imposed by this
equipment. Refer to rating plate or Table 4 for equipment electrical
specifications.
Make all electrical connections in accordance 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.
ELECTRIC
DISCONNECT
SWITCH
Fig. 29—Disconnect Switch and Furnace
CAUTION: Do not connect aluminum wire between
disconnect switch and furnace. Use only copper wire.
(See Fig. 29.) Failure to follow this caution will result in
intermittent unit operation or performance satisfaction.
TABLE 4—ELECTRICAL DATA
OPERATING
VOLTAGE RANGE
Max* Min*
127 104
127 104
127 104
127 104
127 104
127 104
127 104
127 104
127 104
127 104
127 104
COPPER
WIRE ONLY
ALUMINUM
WIRE
A93033
MAX
UNIT
UNIT WIRE
AMPACITY†
AMPS
6.1 8.4
7.3 10.0
6.1 8.4
7.1 9.8
9.5 12.8
7.6 10.4
10.0 13.4
14.1 18.4
10.2 13.5
14.8 19.3
14.6 19.1
Use a separate, fused 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 center fault code indicator light will
flash rapidly and furnace will NOT operate.
WARNING: The cabinet MUST have an uninterrupted
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 electrical 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. 31.)
2. Rotate J-box 180° and attach box to right 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.
Failure to follow this caution will result in intermittent
unit operation or performance satisfaction.
B. 24-v Wiring
Make field 24-v thermostat connections at 24-v terminal block on
furnace control. For proper cooling operation, Y wire from
thermostat MUST be connected to Y terminal on furnace control,
as shown in Fig. 30. The 24-v terminal block is marked for easy
connection of field wiring. (See Fig. 32.) The 24-v circuit contains
a 3-amp, automotive-type fuse located on furnace control. (See
Fig. 33.) Any electrical shorts of 24-v wiring during installation,
service, or maintenance may cause fuse to blow. If fuse replace-
ment is required, use only a fuse of identical size (3 amp) and type.
The control will flash code 24 when fuse needs replacement.
NOTE: Use AWG No. 18 color-coded copper thermostat wire for
lengths up to 100 ft. For wire lengths over 100 ft, use AWG No.
16 wire.
—21—
MIN
MAX WIRE
LENGTH (FT)‡
SIZE
14 44
14 37
14 44
14 38
14 29
14 36
14 28
12 31
14 27
12 30
12 30
MAX FUSE OR
CKT BKR AMPS**
15
15
15
15
15
15
15
20
15
20
20