Cleaning And/Or Replacing Air Filter; Blower Motor And Wheel - Carrier 58CTA Installation And Service Instructions Manual

ELECTRICAL SHOCK AND FIRE HAZARD
Failure to follow this warning could result in personal injury,
death or property damage.
Turn off the gas and electrical supplies to the unit before
performing any maintenance or service. Follow the operating
instructions on the label attached to the furnace.
CARBON MONOXIDE POISONING AND FIRE
HAZARD
Failure to follow this warning could result in fire, personal
injury, or death.
Never operate unit without a filter or with filter access door
removed.
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CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care and
wear appropriate protective clothing, safety glasses and
gloves when handling parts and servicing furnaces.
The minimum maintenance on this furnace is as follows:
1. Check and clean air filter each month or more frequently if
required. Replace if torn.
2. Check blower motor and wheel for cleanliness each heating
and cooling season. Clean as necessary.
3. Check electrical connections for tightness and controls for
proper operation each heating season. Service as necessary.
4. Inspect burner compartment before each heating season for
rust, corrosion, soot or excessive dust. If necessary, have
furnace and burner serviced by a qualified service agency.
5. Inspect the vent pipe/vent system before each heating season
for rust, corrosion, water leakage, sagging pipes or broken
fittings. Have vent pipes/vent system serviced by a qualified
service agency.
6. Inspect any accessories attached to the furnace such as a
humidifier or electronic air cleaner. Perform any service or
maintenance to the accessories as recommended in the acces-
sory instructions.

CLEANING AND/OR REPLACING AIR FILTER

The air filter arrangement will vary depending on the application.
NOTE: If the filter has an airflow direction arrow, the arrow must
point towards the blower.
→
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care and
wear appropriate protective clothing, safety glasses and
gloves when handling parts and servicing furnaces.
Media cabinet filter procedures:
NOTE: Media Cabinet is included with two-stage furnace.
1. Turn off electrical supply to furnace before removing filter
access door.
2. Remove filter cabinet door.
3. Slide filter out of cabinet.
Table 15—FILTER SIZE INFORMATION (IN.)
FURNACE
CASING WIDTH
Side Return
14-1/2 16 X 25 X 1
17-1/2 16 X 25 X 1
21 16 X 25 X 1
24 16 X 25 X 1
* Recommended
4. If equipped with permanent, washable 1-in filter, clean filter
by spraying cold tap water through filter in opposite direction
of airflow. Rinse filter and let dry. Oiling or coating of the
filter is not recommended. See Table 15 for size information.
5. If equipped with factory-specified disposable media filter,
replace only with media filter having the same part number
and size. For expandable replacement media, refer to the
instructions included with the replacement media. If equipped
with accessory KGAFR0301ALL external filter rack, See
Table 15.
6. Slide filter into cabinet.
7. Replace filter cabinet door.
8. Turn on electrical supply to furnace.

BLOWER MOTOR AND WHEEL

ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Blower access 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.
NOTE: The blower wheel should not be dropped or bent as
balance will be affected.
The following steps should be performed by a qualified service
agency.
To ensure long life and high efficiency, clean accumulated dirt and
grease from blower wheel and motor annually.
The inducer and blower motors are pre-lubricated and require no
additional lubrication. These motors can be identified by the
absence of oil ports on each end of the motor.
Clean blower motor and wheel as follows:
1. Turn off electrical supply to furnace.
2. Loosen the thumbscrew from outer door and remove outer
door.
3. For downflow or horizontal furnaces having vent pipes within
the furnace that pass in front of the blower access door:
a. Disconnect vent connector from furnace vent elbow.
b. Disconnect and remove short piece of vent pipe from
within furnace.
4. Remove 2 screws from blower access door and remove blower
access door.
5. Disconnect blower leads from furnace control. Record wire
color and location for reassembly. All other factory wires can
be left connected, but field thermostat connections may need
to be disconnected depending on their length and routing.
6. Remove 2 screws holding control box to blower shelf.
46
FILTER SIZE
FILTER
TYPE
Bottom Return
14 X 25 X 1 Cleanable*
16 X 25 X 1 Cleanable*
20 X 25 X 1 Cleanable*
24 X 25 X 1 Cleanable*