Filter Arrangement - Carrier 58MXA Installation, Start-Up, And Operating Instructions Manual

Step 5—Filter Arrangement
Never operate unit without a filter or with filter access door
removed. Failure to follow this warning can cause fire,
personal injury, or death
→
The air filter arrangement will vary due to application, furnace
orientation, and filter type. The filter may be installed in an
external Filter/Media cabinet (if provided) or the furnace blower
compartment. Factory supplied washable filters are shipped in the
blower compartment.
→
If a factory-supplied external Filter/Media cabinet is provided,
instructions for its application, assembly, and installation are
packaged with the cabinet. The Filter/Media cabinet can be used
with the factory-supplied washable filter or a factory-specified
high-efficiency disposable filter (see cabinet instructions).
→
If installing the filter in the furnace blower compartment, deter-
mine location for filter and relocate filter retaining wire if
necessary. See Table 2 to determine correct filter size for desired
filter location. Table 2 indicates filter size, location, and quantity
shipped with this furnace. See Fig. 2 for location and size of
bottom and side return-air openings.
Table 2—FILTER INFORMATION
AIR FILTER LOCATED IN BLOWER COMPARTMENT
FURNACE
FILTER SIZE (IN.)*
CASING
Side Return
WIDTH (IN.)
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† Cleanable
* 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.
† Factory-provided with furnace.
Use care when cutting support rods in filters to protect against
flying pieces and sharp rod ends. Wear safety glasses, gloves,
and appropriate protective clothing. Failure to follow this
caution could result in personal injury.
For airflow requirements above 1800 CFM, see Air Delivery
table in Product Data literature for specific use of single side
inlets. The use of both side inlets, a combination of 1 side and
the bottom, or the bottom only will ensure adequate return air
openings for airflow requirements above 1800 CFM.
NOTE: Side return-air openings can ONLY be used in UPFLOW
configurations. Install filter(s) as shown in Fig. 18. Bottom
return-air opening may be used with all 4 orientations. Filter may
need to be cut to fit some furnace widths. Install filter as shown in
Fig. 19.
FILTER
TYPE
Bottom Return
(1) 16 X 25 X 1† Cleanable
(1) 20 X 25 X 1† Cleanable
WASHABLE
FILTER
Fig. 18—Filter Installed for Side Inlet
⁄
1
17 -IN. WIDE
2
CASINGS ONLY:
INSTALL FIELD-SUPPLIED
FILTER FILLER STRIP
UNDER FILTER.
3 "
"
1
24 /
2
1 "
Fig. 19—Bottom Filter Arrangement
17
FILTER
RETAINER
WASHABLE
FILTER
FILTER
FILTER
RETAINER
SUPPORT
A93045
A00213