Carrier 58MTB Installation, Start-Up, And Operating Instructions Manual page 22

3-IN. MINIMUM CLEARANCE TO
COMBUSTION-AIR INTAKE IS REQUIRED
(NON-DIRECT VENT/1-PIPE
APPLICATION,SIZES 040
THROUGH 120 ONLY)
ANGLE
IRON OR
EQUIVALENT
(B)
(A) ROD LOCATION
USING DIMPLE
LOCATORS
(SEE DIMENSIONAL
DWG FOR
LOCATIONS)
(A) PREFERRED ROD LOCATION
(B) ALTERNATE ROD LOCATION
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Fig. 25—Crawlspace Horizontal Application for Direct Vent/2-Pipe Installation
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 4 to determine correct filter size for desired
filter location. Table 4 indicates filter size, location, and quantity
shipped with this furnace. See Fig. 2 for location and size of
bottom and side return-air openings.
COMBUSTION-AIR INTAKE
(NON-DIRECT VENT/1-PIPE
APPLICATION,SIZES 040
THROUGH 120 ONLY)
(B)
(A)
3
/ -IN. HEX NUT (A)
8
& WASHER (4)
REQD PER ROD
NOTES:
1. A 1 In. clearance minimum between top of
furnace and combustible material.
2. The entire length of furnace must be
supported when furnace is used in horizontal
position to ensure proper drainage.
3. For non-direct vent/1-pipe application,
bottom side combustion-air entry cannot be
used when furnace is installed with hangers
as shown.
and for Non-Direct Vent/1-Pipe Installation
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22
COMBUSTION-AIR PIPE
(DIRECT VENT/2-PIPE
APPLICATION,ALL SIZES)
"
3
5 ⁄
4
DRAIN
(A)
(B)
13
/ -IN. MAX
16
(B)
ALTERNATE SUPPORT
LOCATION FROM BACK
Table 4—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
* 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 distributor or dealer.
† Upflow only. Alternate sizes and additional filters may be ordered from your
dealer.
VENT
3
⁄
8 -IN. ROD
ALTERNATE SUPPORT
LOCATION 4-IN. MIN
8-IN. MAX
A05054
FILTER
TYPE
Bottom Return*
(1) 16 X 25 X 1 Cleanable
(1) 20 X 25 X 1 Cleanable