Carrier 58DXT - Page 3

Never operate unit without a filter(s) or with filter access door
removed. A failure to follow this warning could result in fire,
personal injury, or death.
1. Downflow
Each furnace requires 2 filters which are installed in the
return-air duct. (See Fig. 4.) To remove filters for cleaning or
replacement, proceed as follows:
a. Turn off electrical supply before removing blower access
door.
b. Remove blower access door.
c. Reach up behind top plate, tilt filters toward center of
return-air plenum, remove filters. Replace filters if torn or
damaged.
d. Furnaces are equipped with permanent, washable filters.
e. Clean filters by spraying tap water through filter from
opposite direction of airflow.
f. Rinse and let dry. Oiling or coating of filters is not
recommended or required.
g. Reinstall filters.
h. Replace blower access door and turn on electrical supply to
furnace.
2. Upflow/Horizontal.
Each furnace requires 1 or 2 filters which are installed in the
blower compartment. (See Fig. 5.) To remove filters for
cleaning or replacement, proceed as follows:
a. Turn off electrical supply before removing blower and
control access doors.
b. Release filter retainer from clip at front of furnace casing.
(See Fig. 5.) For side return, clips may be used on either or
both sides of the furnace.
c. Slide filter out.
d. Clean filters by spraying tap water through filter from
opposite direction of airflow.
e. Rinse and let dry. Oiling or coating of filter is not
recommended or required.
f. Place filter in furnace.
g. Replace blower and control access doors and turn on
electrical supply to furnace.
BLOWER MOTOR AND WHEEL
The following items should be performed by a qualified service
technician:
To ensure long life, economy, and high efficiency, clean accumu-
lated 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. Remove blower access door.
3. Downflow only.
a. Disconnect vent connector from furnace flue collar. (See
Fig. 6.)
b. Remove internal vent pipe enclosure cover.
c. Disconnect and remove short piece of internal vent pipe
from within furnace.
d. Disconnect and remove vent pipe enclosure. Push bottom
side backward to release tabs.
NOTE: Vent pipe is SCREWED and RTV sealed to relief box.
4. Disconnect blower leads from furnace control. Note wire color
and location for reassembly. Also, disconnect auxiliary limit
switch leads (downflow only, if present).
Fig. 4—Downflow Filter Arrangement
A88486
RETURN-AIR
PLENUM
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AIRFLOW
ACCESS DOOR
INSTALLATION
POSITION
OF FILTERS
Fig. 5—Model 330JAV Upflow
A95386
MOUNTING
SCREWS
RELIEF
BOX
MAIN
LIMIT
SWITCH
MANUAL
RESET
LIMIT
SWITCHES
CONTROL
FILTER
RETAINER
WASHABLE
FILTER
PRESSURE
SWITCHES
DRAFT
SAFEGUARD
SWITCH
3
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