Bryant 935SA Manual page 53

935SA: Installation, Start-up, Operating and Service Maintenance Instructions
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury, or death.
Blower access door switch opens 115-v power to furnace control. No
component operation can occur unless switch is closed. Exercise
caution to avoid electrical shock from exposed electrical components
when manually closing this switch for service purposes.
b. Manually close blower access door switch.
c. Verify blower is rotating in the correct direction.
15. If furnace is operating properly, RELEASE BLOWER ACCESS
DOOR SWITCH. Remove any jumpers or reconnect any
disconnected thermostat leads.
16. Replace blower access door.
17. Cycle furnace through one complete heating and cooling cycle.
Verify the furnace temperature rise as shown in "Adjustments"
Section. Adjust temperature rise as shown in "Adjustments"
Section. If outdoor temperature is below 70_F, (21_C) turn off
circuit breaker to outdoor unit before running furnace in the cooling
cycle. Turn outdoor circuit breaker on after completing cooling
cycle.
MOTOR SHAFT FLAT
SET SCREW
SEE DETAIL
SCREW LOCATION
BLOWER HSG ASSY
BRACKET
BRACKET
ENGAGEMENT
A
DETAIL
BRACKET
CAPACITOR
OR POWER CHOKE
(WHEN USED)
SCREW
Fig. 64 – Blower Assembly
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
GROMMET
MOTOR ARM
MOTOR WHEEL HUB
A
CUTOFF, BLOWER
WHEEL, BLOWER
BLOWER HSG ASSY
MOTOR, BLOWER
(GND)
MOTOR SHAFT FLAT
SET SCREW
SCREW LOCATION
BLOWER HSG ASSY
BRACKET
BRACKET
ENGAGEMENT
DETAIL
BRACKET
CAPACITOR
OR POWER CHOKE
(WHEN USED)
SCREW
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal injury or death.
Blower door switch opens 115-v power to control. No component
operation can occur unless switch is closed. Caution must be taken
when manually closing this switch for service purposes.
Cleaning Flame Sensor
The following items must be performed by a qualified service
technician. If the Flame Sensor develops an accumulation of light dirt or
dust, it may be cleaned by using the following procedure:
ELECTRICAL SHOCK AND FIRE HAZARD
Failure to follow this warning could result in personal injury, death,
and/or property damage.
Turn off the gas and electrical supplies to the furnace and install lockout
tag before performing any maintenance or service. Follow the operating
instructions on the label attached to the furnace.
A11584
FIRE OR EXPLOSION HAZARD
Failure to follow this warning could result in personal injury, death,
and/or property damage.
When servicing the flame sensor, only use the factory-provided 1/4-in.
length screws. Use of alternate screws will damage unit components.
53
MOTOR WHEEL HUB
A
SEE DETAIL
A
CUTOFF, BLOWER
WHEEL, BLOWER
BLOWER HSG ASSY
MOTOR, BLOWER
SCREW
(GND)
Fig. 65 – Blower Assembly on
66100E21
WARNING
!
WARNING
!
WARNING
!
GROMMET
MOTOR ARM
SCREW
A190407