935SA: Installation, Start-up, Operating and Service Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
53
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.
A11584
Fig. 64 – Blower Assembly
A190407
Fig. 65 – Blower Assembly on
66100E21
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:
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.
SET SCREW
MOTOR WHEEL HUB
MOTOR SHAFT FLAT
SCREW
MOTOR ARM
GROMMET
SCREW LOCATION
BLOWER HSG ASSY
BRACKET
BRACKET
ENGAGEMENT
SEE DETAIL
A
CAPACITOR
OR POWER CHOKE
(WHEN USED)
BRACKET
SCREW
(GND)
BLOWER HSG ASSY
MOTOR, BLOWER
WHEEL, BLOWER
CUTOFF, BLOWER
DETAIL
A
WARNING
!
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.
WARNING
!
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.
WARNING
!
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.
SET SCREW
MOTOR WHEEL HUB
MOTOR SHAFT FLAT
SCREW
MOTOR ARM
GROMMET
SCREW LOCATION
BLOWER HSG ASSY
BRACKET
BRACKET
ENGAGEMENT
SEE DETAIL
A
CAPACITOR
OR POWER CHOKE
(WHEN USED)
BRACKET
SCREW
(GND)
BLOWER HSG ASSY
MOTOR, BLOWER
WHEEL, BLOWER
CUTOFF, BLOWER
DETAIL
A