F96VTN and G96VTN: Installation, Start-up, Operating and 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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2. Remove blower door.
3. All factory wires can be left connected, but field thermostat and
accessory wiring may need to be disconnected depending on their
length and routing.
4. If the vent and combustion air pipe passes through the blower
compartment, it will be necessary to remove the pipes from the
blower compartment.
Disconnect the vent and combustion air pipe by:
a. Loosen the clamps or screw on the vent couplings and
combustion air pipe external to the furnace.
b. Separate the pipes from the couplings and move them aside.
c. Loosen the clamps on the vent couplings and combustion air pipe
located on the blower shelf.
d. Separate the pipes from the blower compartment and set aside.
e. Remove the couplings from the pipe adapters and set aside.
f. After servicing the blower, reverse steps a through e, resealing
combustion air pipe per installation instructions.
g. Tighten all clamps 15 lb -in.
See
For Steps 5 through 14.
5. Remove screws securing blower assembly to blower shelf and slide
blower assembly out of furnace. Detach ground wire and
disconnect blower motor harness plugs from blower motor.
A190407
Fig. 66 – Blower Assembly on
100V21
--
221002122
NOTE:
Blower wheel is fragile. Use care.
NOTE:
On 1002122 size, the top screw securing blower to shelf must be
removed in order to remove the blower. (See
6. Clean blower wheel and motor by using a vacuum with soft brush
attachment. Be careful not to disturb balance weights (clips) on
blower wheel vanes. Do not bend wheel or blades as balance will be
affected.
7. If greasy residue is present on blower wheel, remove wheel from
the blower housing and wash it with an appropriate degreaser. To
remove wheel:
NOTE:
The DIBC composite wheel used in some models should be
cleaned with mild soapy water only. Allow wheel to dry prior to
reassembly.
a. Mark blower wheel location on shaft before disassembly to
ensure proper reassembly.
b. Loosen setscrew holding blower wheel on motor shaft.
NOTE:
Mark blower mounting arms and blower housing so each arm is
positioned at the same hole location during reassembly.
c. Mark blower wheel orientation and cutoff plate location to
ensure proper reassembly.
d. Remove screws securing cutoff plate and remove cutoff plate
from housing.
e. Remove bolts holding motor mounts to blower housing and slide
motor and mounts out of housing.
f. Remove blower wheel from housing.
g. Clean wheel per instructions on degreaser cleaner. Do not get
degreaser in motor.
8. Reassemble motor and blower wheel by reversing items 7b through
7f. Ensure wheel is positioned for proper rotation.
9. Torque motor mounting bolts to 40 +/- 10 lb-in. when reassembling.
10. Torque blower wheel set screw to 160 +/- 20 lb-in. when
reassembling.
11. 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.
12. Spin the blower wheel by hand to verify that the wheel does not rub
on the housing.
13. Reinstall blower assembly in furnace.
NOTE:
On 1002122, ensure that the blower wrapper sits on top of the
two tabs on blower sidewalls. (See
)
14. Reinstall 2 screws securing blower assembly to blower deck.
15. Reconnect blower leads to furnace control. Refer to furnace wiring
diagram, and connect thermostat leads if previously disconnected.
NOTE:
Be sure to attach ground wire and reconnect blower harness
plugs to blower motor.
16. Downflow or horizontal furnaces with vent pipe through furnace
only:
a. Install and connect short piece of vent pipe inside furnace to
existing vent.
b. Connect vent connector to vent elbow.
17. Turn on electrical supply. Manually close blower door switch. Use a
piece of tape to hold switch closed. Check for proper rotation and
speed changes between heating and cooling by jumpering R to G
and R to Y/Y2 on furnace control thermostat terminals. If outdoor
temperature is below 70
_
F, turn off circuit breaker to outdoor unit
BLOWER WHEEL SET-SCREW
SHALL BE TIGHTENED TO
160 IN.-LB. +/-20 IN. -LB.
MOTOR SHAFT FLAT
BLOWER
WHEEL
HUB
GROMMET
MOTOR
ARM
WASHER
SCREW
BRACKET
BLO HSG ASSY
BRACKET, BLO MTG (LEFT)
SCREW (2)
ENSURE THAT
WRAPPER IS OVER
TAB ON EACH SIDE
BRACKET, BLO MTG (RIGHT)
BLOWER MOTOR
SCREW
SCREW
LOCATIONS
BLO HSG ASSY
SCREW (3)
SCREW (3)
SCREW
COLLAR
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.