International comfort products A Series Installation Instructions Manual page 55

7. If a greasy residue is present on blower wheel, remove
wheel from the blower housing and wash it with an appro-
priate degreaser. To remove wheel:
NOTE:
Before disassembly, mark blower motor, and blower
housing so motor and each arm is positioned at the same location
during reassembly.
a. Disconnect ground wire attached to blower housing.
b. Remove screws securing cutoff plate and remove cutoff
plate from housing.
c. Loosen set screw holding blower wheel on motor shaft
(160+/- -20 in.- -lb. when reassembling).
d. Remove bolts holding motor to blower housing and slide
motor out of wheel (40+/- -10 in.- -lb. when reassembling).
e. Remove blower wheel from housing.
f. Clean wheel and housing.
8. Reassemble motor and blower by reversing steps 7.d.
finishing with 7.a. Be sure to reattach ground wire to the
blower housing.
NOTE: On 1002122, ensure that the the blower wrapper sits on
top of the two tabs on blower sidewalls. (Fig 65)
9. Verify that blower wheel is centered in blower housing and
set screw contacts the flat portion of the motor shaft. Loosen
set screw on blower wheel and reposition if necessary.
10. Spin the blower wheel by hand to verify that the wheel does
not rub on the housing.
11. Reinstall blower assembly in furnace.
12. Reinstall two screws securing blower assembly to blower
deck.
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in shortened heat
exchanger life.
Heating fan speed(s) MUST be adjusted to provide proper
air temperature rise as specified on the rating plate.
Recommended operation is at the midpoint of the rise range
or slightly above. Refer to "SET TEMPERATURE RISE"
under START- -UP, ADJUSTMENT,
CHECK.
NOTE: Refer to motor speed lead relocation if leads were not
identified before disconnection (Table 11).
13. Refer to furnace wiring diagram, and connect thermostat
leads if previously disconnected.
14. To check blower for proper rotation:
a. Turn on electrical supply.
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.
440 01 4601 01
and SAFETY
Specifications subject to change without notice.
17. Cycle furnace through one complete heating and cooling
cycle. Verify the furnace temperature rise as shown in "Ad-
justments" 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
MOTOR WHEEL HUB
A
SEE DETAIL
SCREW LOCATION
BLOWER HSG ASSY
BRACKET
BRACKET
ENGAGEMENT
A
DETAIL
CUTOFF, BLOWER
BRACKET
CAPACITOR
OR POWER CHOKE
(WHEN USED)
SCREW
(GND)
Representative drawing only, some models may vary in appearance.
Fig. 64 - - Blower Assembly
Fig. 65 - - Blower Assembly on 1002122
GROMMET
MOTOR ARM
SCREW
WHEEL, BLOWER
BLOWER HSG ASSY
MOTOR, BLOWER
A11584
A190407
55