Filtering Out Trouble - Carrier 58YAV Users Information Manual For The Operation And Maintenance

CAUTION
!
Although special care has been taken to minimize
sharp edges, be extremely careful when handling
parts or reaching into the furnace.

FILTERING OUT TROUBLE

A dirty filter will cause excessive stress on the furnace and
can cause it to overheat and automatically shut down. The
furnace filter should be checked every 3 or 4 weeks and
cleaned if necessary.
If installed with factory specified disposable media filter,
check or replace filter before each heating and cooling sea-
son. Replace disposable media filter at least once a year.
If your furnace filter needs replacing, be sure to use the
same size and type of filter that was originally supplied. Use
the Furnace Filter Table and match your furnace size with
the proper filter size.
CAUTION
!
Never operate your furnace without a filter in place.
Doing so may damage the furnace blower motor.
An accumulation of dust and lint on internal parts
of your furnace can cause a loss of efficiency.
The air filter is normally located in the blower compartment.
(See Fig. 2) or in the factory-supplier filter cabinet attached
to the side or bottom of the blower cabinet. If air filter has
been installed in another location, contact your dealer for
instructions. To inspect, clean and/or replace the air filter(s),
follow these steps:
1. Turn off the electrical supply to the furnace. (See
Fig. 17.)
2. Remove door/access panel
• AIR FILTER(S) LOCATED IN BLOWER COM-
PARTMENT
Remove control and blower access doors. (See Fig. 8)
• AIR FILTER LOCATED IN FILTER CABINET
Remove filter cabinet door (See Fig. 24 and 25)
NOTE: It will be necessary to remove 1 thumbscrew.
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3. Remove air filter from furnace.
• AIR FILTER LOCATED IN BLOWER COMPART-
MENT:
a. Slide filter retainer sideways until it is free of latch.
(See Fig. 20)
b. Gently remove air filter and carefully turn the dirty
side up (if dirty) to avoid spilling dirt from the filter
(see Fig. 21)
• AIR FILTER LOCATED IN FILTER CABINET:
a. Slide air filter out of furnace. Keep dirty side up (if
dirty) to avoid spilling dirt. (See Fig. 26 and 27)
4. Inspect the filter. If torn, replace it.
NOTE: If washable filter that was shipped with the furnace
has been replaced by:
a) Factory specified disposable media filter – Do not clean.
If dirty, replace only with media filter having the same
part number and size. Install with airflow direction arrow
pointing towards blower.
b) Electronic air cleaner (EAC) – Refer to EAC owner's
Manual for maintenance information.
5. Wash filter (if dirty) in sink, bathtub, or outside with a gar-
den hose. Always use cold tap water. A mild liquid deter-
gent may be used if necessary. Spray water through filter
in the opposite direction of airflow. Allow filter to dry.
6. Reinstall clean air filter
7. Reinstall filter retainer (for blower compartment locations
only)
8. Replace control and blower doors (See Fig. 13 and 22) or
filter cabinet door (Fig. 28 and 29)
9. Turn on electrical supply to furnace (see Fig 18).
NOTE: For upflow models only—if side return ducts are used,
2 filters may be required in some models.The procedure listed
above may be used to remove side filters.
UPFLOW FURNACE AIR FILTER TABLE
AIR FILTER LOCATED IN BLOWER COMPARTMENT
FURNACE
CASING
WIDTH (IN.) Side Return
14-3/16 (1) 16 x 25 x 1*
17-1/2 (1) 16 x 25 x 1*
21 (1) 16 x 25 x 1
24-1/2 (1 or 2) 16 x 25 x 1 (1) 24 x 25 x 1*
AIR FILTER LOCATED IN FILTER CABINET
FILTER
CABINET
20
HEIGHT (IN)
16
20
24
* Factory provided with the furnace. Filters may be field modified by cutting
filter material and support rods (3) in filters. Alternate sizes and additional
filters may be ordered from your dealer.
6
FILTER SIZE (IN)
Bottom Return
(1) 14 x 25 x 1
(1) 16 x 25 x 1*
(1) 20 x 25 x 1*
FILTER FILTER
SIZE (IN)
(1) 16 x 25 x 1* or (1) Cleanable
16 x 25 x 4-5/16 Disposable
(1) 20 x 25 x 1* Cleanable
or (1) 20 x 25 x 4-5/16 Disposable
(1) 24 x 25 x 1* Cleanable
or (1) 24 x 25 x 4-5/16 Disposable
21
FILTER
TYPE
Cleanable
Cleanable
Cleanable
Cleanable
TYPE