Carrier 58UHV - INSTALLATION

FILTER ARRANGEMENT
Never operate unit without a filter or with filter access door
removed. A failure to follow this warning could result in fire,
personal injury, or death.
The factory-supplied filter(s) are shipped in the blower compart-
ment. Determine location for the filter and move filter retaining
hardware, if necessary, before attaching the return-air duct. After
the return-air duct has been connected to the furnace, install the
filter(s) inside the furnace blower compartment. See Fig. 5 for side
return application and Fig. 6 for bottom return application.
A bottom closure panel is factory installed in bottom of furnace.
When bottom return inlet is desired, remove and discard enclosure
panel.
Filter retaining brackets, supports, and retainers are factory as-
sembled and shipped installed for side return application, with 1
set of all required hardware on each furnace. (See Fig. 5.)
For bottom return applications, remove front and back brackets
and supports from each side. The back bracket(s) are installed in
the rear of the furnace casing. Dimples are provided to mark
mounting screw locations.
Rotate filter side supports 180° so filter will rest on support and
reinstall. Install small U-shaped end of filter retaining rod in rear
bracket. Install front of filter retainer rod as shown in Fig. 6. Two
sets of hardware are needed for furnaces in 24-1/2 in. casings using
2 filters for bottom return. All hardware is provided for filter
installation.
INSTALLATION
Step 1—Upflow Furnace Installation
Do not install the furnace on its back. Safety control operation
will be adversely affected. Never connect return-air ducts to
the sides or back of the furnace. A failure to follow this
warning could result in fire, personal injury, or death.
NOTE: Door clip on control door may be removed for upflow
installations.
1. Position furnace in desired location.
2. Connect gas supply pipe.
3. Connect supply- and return-air ducts.
Step 2—Horizontal Furnace Attic Installation
Do not install the furnace on its back; safety control operation
will be adversely affected. Never connect return-air ducts to
back, top, or bottom of the furnace (See Figs. 7 and 8). A
failure to follow this warning could result in fire, personal
injury, or death.
The furnace can be installed horizontally with either the left-hand
(LH) or right-hand (RH) side down. A typical furnace attic
installation is shown in Fig. 7.
CONSTRUCT A WORKING PLATFORM
Construct working platform on location where all required furnace
clearances are met. (See Figs. 2 and 7.)
INSTALL FURNACE
1. Position furnace in desired location.
2. Connect gas supply pipe. See Fig. 7 for typical piping entry.
3. Connect supply- and return-air ducts.
4. Install 24 X 24-in. sheet metal shield on platform in front of
louvered control panel as shown in Fig. 7.
Step 3—Horizontal Furnace
Crawlspace Installation
The furnace can be installed horizontally with either the LH or RH
side up. In a crawlspace, furnace can either be hung from floor
joist (See Fig. 8) or installed on suitable blocks or pad. (See Fig.
9.) The furnace can be suspended from each corner by hanger bolts
(4 each 3/8-in. all-thread rod) cut to desired length, 1 X 3/8-in. flat
washer, 3/8-in. lockwasher, and 3/8-in. nut. Dimples are provided
for hole locations. (See Fig. 1.)
Fig. 5—Side Filter Arrangement
A95284
FILTER
RETAINER
WASHABLE
FILTER
Fig. 6—Bottom Filter Arrangement
A93046
WASHABLE
FILTER
FILTER
SUPPORT
FILTER
RETAINER
Table 3—Filter Information (In.)
FURNACE
CASING WIDTH
FILTER SIZE*
FILTER
TYPE
Side Return Bottom Return
14-3/16‡ (1) 16 X 25 X 1† (1) 14 X 25 X 1 Cleanable
21 (1) 16 X 25 X 1 (1) 20 X 25 X 1† Cleanable
24-1/2 (2) 16 X 25 X 1† (1) 24 X 25 X 1 Cleanable
* Filters can be field modified by cutting the frame as marked and folding to the
desired size. Alternate sizes can be ordered from your distributor or dealer.
† Factory-provided with the furnace.
‡ External side filter rack must be used for upflow right-side return.
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