Bryant 351DAS, Installation, Start-Up & Operating Instructions

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J-BOX RELOCATION
1. Remove 2 screws holding auxiliary J-box. (See Fig. 15.)
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.
II. 24-V WIRING
Make field 24-v thermostat connections at 24-v terminal block on
control center. For proper cooling operation, Y wire from thermo-
stat MUST be connected to Y terminal on control center, as shown
in Fig. 14. The 24-v terminal board is marked for easy connection
of field wiring. (See Fig. 16.) The 24-v circuit contains a 3-amp,
automotive-type fuse located on control center. (See Fig. 17.) Any
electrical shorts of 24-v wiring during installation, service, or
maintenance may cause fuse to blow. If fuse replacement is
required, use only a fuse of identical size (3 amp).
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.
III. ACCESSORIES
1. Electronic Air Cleaner (EAC)
Two quick-connect terminals marked EAC-1 and EAC-2,
are provided for EAC connection. (See Fig. 17.) These
terminals are energized with 115v (1.5-amp maximum)
during blower motor operation.
2. Humidifier (HUM)
A quick-connect terminal (HUM) and screw terminal (C
OM
)
are provided for 24-v humidifier connection. (See Fig. 16.)
HUM terminal is energized with 24v (0.5-amp maximum)
after inducer motor prepurge period.
NOTE: A field-supplied, 115-v controlled relay connected to
EAC terminals may be added if humidifier operation is desired
during blower operation.
DIRECT VENTING
The 351DAS Furnace requires a dedicated direct-vent system. In a
direct-vent system, all air for combustion is taken directly from
outside atmosphere, and all flue products are discharged to outside
atmosphere.
I. REMOVAL OF EXISTING FURNACES FROM
COMMON VENT SYSTEMS
If furnace being replaced was connected to a common vent system
with other appliances, the following steps shall be followed with
each appliance connected to the venting system placed in opera-
tion, while any other appliances connected to the venting system
are not in operation:
1. Seal any unused openings in the venting system.
Fig. 14—Heating and Cooling Application Wiring Diagram
A98209
115-V
FIELD-SUPPLIED
DISCONNECT
AUXILIARY
J-BOX
CONTROL
BOX
24-V
TERMINAL
BLOCK
THREE-WIRE
HEATING-
ONLY
FIVE
WIRE
NOTE 1
NOTE 2
FIELD-SUPPLIED
DISCONNECT
CONDENSING
UNIT
TWO
WIRE
FURNACE
R
G
C
W C R G Y
GND
GND
FIELD 24-V WIRING
FIELD 115-, 208/230-, 460-V WIRING
FACTORY 24-V WIRING
FACTORY 115-V WIRING
208/230- OR
460-V
THREE
PHASE
208/230-V
SINGLE
PHASE
WHT
BLK
WHT
BLK
NOTES: Connect Y-terminal as shown for proper operation.
Some thermostats require a "C" terminal connection as shown.
If any of the original wire, as supplied, must be replaced, use
same type or equivalent wire.
W
Y
GND
THERMOSTAT
TERMINALS
1.
2.
3.
Fig. 15—Relocating J-Box
A99023
ALTERNATE
FIELD
LOCATION
FACTORY
INSTALLED
LOCATION
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