Electrical Connections; 115-V Wiring; Accessories; Venting - Bryant 395CAV Series Installation, Start-Up, And Operating Instructions Manual

TABLE 4—MAXIMUM CAPACITY OF PIPE*
NOMINAL IRON INTERNAL
PIPE SIZE DIAMETER
(IN.) (IN.)
1/2 0.622
3/4 0.824
1 1.049
1-1/4 1.380
1-1/2 1.610
* Cubic ft of gas per hr for gas pressures of 0.5 psig (14-in. wc) or less, and a
pressure drop of 0.5-in. wc (based on a 0.60 specific gravity gas). Ref: Table
10-2 NFPA 54-1999.
WARNING: Use the proper length of pipes to avoid
stress on the gas control manifold. Failure to follow this
warning can result in a gas leak, causing fire, explosion,
personal injury, or death.
CAUTION: Connect the gas pipe to the furnace using a
backup wrench to avoid damaging gas controls.
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.
Failure to follow this warning can cause a fire, explosion,
personal injury, or death.
gas valve before the test. It is recommended that the ground joint
union be loosened before pressure testing. After all connections
have been made, purge the lines and check for leakage with
regulated gas supply pressure.
GAS
SUPPLY
MANUAL
SHUTOFF
VALVE
(REQUIRED)
SEDIMENT
TRAP
UNION
Fig. 8—Typical Gas Pipe Arrangement
VIII. 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.
LENGTH OF PIPE (FT)
10 20 30 40 50
175 120 97 82 73
360 250 200 170 151
680 465 375 320 285
1400 950 770 660 580
2100 1460 1180 990 900
A89417
CAUTION: Do not connect aluminum wire between
disconnect switch and furnace. Use only copper wire.
Make all electrical connections in accordance with the National
Electrical Code (NEC) ANSI/NFPA 70-1999 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.
WARNING: The cabinet MUST have an uninterrupted
or unbroken ground according to NEC, ANSI/NFPA
70-1999 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.
The auxiliary junction box (J-box) can be moved to the left-hand
side of the furnace when a left-side power supply is desired.
Remove the 2 screws holding the auxiliary J-box. Mount the J-box
on the left-hand side of the furnace (holes have been pre-drilled in
casing). When moved, tuck the wiring harness behind the clip
provided to keep extra wire lengths out of the way.
NOTE: Proper polarity must be maintained for 115-v wiring. If
polarity is incorrect, control board status code indicator light will
flash rapidly and the furnace will not operate.
B. 24-v Wiring
Make field 24-v connections at the 24-v terminal strip. (See Fig.
15.) Connect terminal Y/Y2 as shown in Fig. 9 for proper cooling
operation. Use only AWG No. 18, color-coded, copper thermostat
wire.
The 24-v circuit contains an automotive-type, 3-amp fuse located
on the main control board. Any direct shorts during installation,
service, or maintenance could cause this fuse to blow. If fuse
replacement is required, use ONLY a 3-amp fuse of identical size.
C. Accessories
1. Electronic Air Cleaner (EAC)
Two quick-connect terminals, marked EAC-1 and EAC-2,
are provided for EAC connection (See Fig. 15). These
terminals are energized with 115-v (1.0-amp maximum)
during blower motor operation.
2. Humidifier (HUM)
Quick-connect terminal (HUM) and screw terminal (C
24V) are provided for 24-v humidifier connection. The
terminals are energized with 24-v 0.5-amp maximum after
inducer motor prepurge period.
WARNING: DO NOT connect furnace control HUM
terminal to HUM (humidifier) terminal on Thermidi-
stat™, Zone Controller or similar device. See Thermidis-
tat, Zone Controller, thermostat, or controller manufac-
turer's instructions for proper connection. A failure to
follow this warning could result in fire.
NOTE: A field-supplied, 115-v controlled relay connected to
EAC terminals may be added if humidifier operation is desired
during blower operation.
IX. VENTING
Refer to the national or local installation code such as NFGC in the
United States, or the NSCNGPIC in Canada for proper vent sizing
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