926SB: Installation, Start-up, Operating, Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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11. Connect field power and neutral leads to furnace power leads inside
the external electrical box as shown in Fig. 32.
For a top panel-mounted external electrical box,
complete the following:
1. Drill two (2) 1/8-in. (3 mm) pilot holes through the dimples in the
furnace casing near the 7/8-in. knockout or plug on the side of the
casing. Do not remove the knockout or plug in the side of the
casing.
2. Align the J-Box bracket with the pilot holes inside the furnace
casing.
3. Install 2 screws through the outside of the casing to secure the
J-Box bracket to the furnace casing.
4. Route field power wiring into external electrical box.
5. Pull furnace line voltage power wires through strain-relief bushing
of the external electrical box.
6. Pull the ground wire of the field line voltage wiring through the
strain-relief bushing into the furnace casing.
7. Install the green ground screw to the J-Box bracket and attach both
ground wires to the green ground screw.
8. Connect any code required external disconnect(s) to field power
wiring.
9. Connect field power and neutral leads to furnace power leads inside
the external electrical box as shown in Fig. 34.
Power Cord Installation in Furnace J-Box
NOTE: Power cords must be able to handle the electrical requirements
listed in Table 12. Refer to power cord manufacturer’s listings.
1. Install J-Box mounting bracket to inside of furnace casing. See
Fig. 35.
2. Route listed power cord through 7/8-in. (22 mm) diameter hole in
casing and J-Box bracket.
3. Secure power cord to J-Box bracket with a strain relief bushing or a
connector approved for the type of cord used.
4. Pull furnace power wires through 1/2-in. (12 mm) diameter hole in
J-Box. If necessary, loosen power wires from strain—relief wire-tie
on furnace wiring harness.
5. Connect field ground wire and factory ground wire to green ground
screw on J-Box mounting bracket as shown in Fig. 35.
6. Connect power cord power and neutral leads to furnace power leads
as shown in Fig. 33.
7. Attach furnace J-Box cover to mounting bracket with screws
supplied in loose parts bag. Do not pinch wires between cover and
bracket. See Fig. 35.
BX Cable Installation in Furnace J-Box
1. Install J-Box mounting bracket to inside of furnace casing. See
Fig. 35.
2. Route BX connector through 7/8-in. (22 mm) diameter hole in
casing and J-Box bracket.
3. Secure BX cable to J-Box bracket with connectors approved for the
type of cable used.
4. Connect field ground wire and factory ground wire to green ground
screw on J-Box mounting bracket as shown in Fig. 35.
5. Connect field power and neutral leads to furnace power leads. as
shown in Fig. 33.
6. Attach furnace J-Box cover to mounting bracket with screws
supplied in loose parts bag. Do not pinch wires between cover and
bracket.
24-V Wiring
Make field 24-V connections at the 24-V terminal strip. See Fig. 38.
Connect terminal Y/Y2 as shown in Fig. 33 for proper cooling operation.
Use only AWG No. 18, color-coded, copper thermostat wire.
NOTE: Use AWG No. 18 color-coded copper thermostat wire for
lengths up to 100 ft. (30 M). For wire lengths over 100 ft., use AWG No.
16 wire.
The 24-V circuit contains an automotive-type, 3-amp. fuse located on
the control. 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. See Fig. 38.
INTELISENSE™ TECHNOLOGY
This furnace is InteliSense capable when used with an ecobee for Bryant
smart thermostat with InteliSense technology. InteliSense technology
allows for the collection of performance data to be sent to the cloud.
Utilizing Bryant’s digital tools, dealers can gather system settings and
equipment data, with homeowner opt-in, to provide quicker and more
efficient service. The furnace comes with a Return Air Temperature
(RAT) sensor installed on the control board and a Supply Air
Temperature (SAT) for installation in the field.
Install Supply Air Temperature (SAT) Sensor
1. Locate SAT sensor in main supply trunk after furnace and cooling
coil. Placing the SAT sensor after the first bend in main supply
trunk will yield the best readings. If this is not possible, further
down the main trunk will allow for more mixing and better results.
2. Drill a 1/4-in. hole at location in supply trunk where sensor will be
installed.
3. Insert sensor in hole and use as a template to mark the two (2)
mounting holes.
4. Drill two (2) 1/16-in. holes to accept No. 8 screws through
pre-drilled holes in duct temperature sensor back plate.
5. Use two (2) provided No. 8 sheet metal screws to mount the supply
air temperature sensor to the system.
6. Route SAT wire leads into furnace blower compartment along with
the thermostat wires. Use provided grommet to protect the wires
through the furnace casing.
7. Connect sensor wire leads to furnace control at the screw terminal
marked SAT. If additional wire length is needed, thermostat wire
and wire nuts can be used to extend the wires.
Refer to the thermostat advanced installation and configuration
instructions found at Bryant.hvacpartners.com/InteliSense for system
setup.
NOTE: When InteliSense communications with the thermostat is
present, the green COMM light on the furnace control will be on. If the
COMM light is not on when expected, check the steps under fault code
19.1 in the trouble shooting guide (Fig. 71). Fault code 19.1 will not be
displayed until after InteliSense communication has been established for
the first time.
WARNING
!
FIRE, EXPLOSION, ELECTRICAL SHOCK, AND
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in dangerous operation,
personal injury, death, or property damage.
Do not drill into blower shelf of furnace to route control wiring. Route
any control or accessory wiring to the blower compartment through
external holes provided on the casing.
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