Carrier 58MXA Installation, Start-Up, And Operating Instructions Manual page 16

FURNACE
CASBNG
WIDTH
Table 1--OpeNng Dimensions (in.)
APPLICATION
FLOOR OPENING
D
24-3/4
19-5/8
PLENUM OPENING
A B
16 24-1/8
15-7/8 19
15-1/8 19
15-1/2 19
19-1/2 24-1/8
19-3/8 19
18-5/8 19
19 19
23 24-1/8
22-7/8 19
22-1/8 19
22-1/2 19
C
Upflow Applications 16-5/8
Downflow Applications on Non-Combustible Flooring 16-1/2
Downflow Applications on Combustible Flooring Using
KGASB Subbase 16-3/4 20-3/8
17-112 Furnace with or without CD5 or CK5 Coil Assembly or
KCAKC Coil Box
Downflow Applications on Combustible Flooring NOT Using
KGASB Subbase
Furnace with or without CD5 or CK5 Coil Assembly or 16-1/2 20
KCAKC Coil Box
Upflow Applications 20-1/8 24-3/4
Downflow AppIications on Non-Combustible Flooring 20 1%5/8
Downflow Applications on Combustible Flooring Using
KGASB Subbase 20-1/4 20-3/8
21 Furnace with or without CD5 or CK5 Coil Assembly or
KCAKC Coil Box
Downflow Applications on Combustible Flooring NOT Using
KGASB Subbase
Furnace with or without CD5 or CK5 Coil Assembly or 20 20
KCAKC Coil Box
Upflow Applications 23-5/8 24-3/4
Downflow Applications on Non-Combustible Flooring 23-1/2 1%5/8
Downflow Applications on Combustible Flooring Using
KGASB Subbase 23-3/4 20-3/8
24-112 Furnace with or without CD5 or CK5 Coil Assembly or
KCAKC Coil Box
Downflow Applications on Combustible Flooring NOT Using
KGASB Subbase
Furnace with or without CD5 or CK5 Coil Assembly or 23-1/2 20
KCAKC Coil Box
FURNACE
CD5 OR CK5
COIL ASSEMBLY
OR KCAKC
COIL BOX
/_ COMBUSTIBLE
FLOORING "k
SHEET METAL ._,.
PLENUM
__
FLOOR
__
OPENING
A96284
Fig. 20--Furnace, Plenum, and Coil AssemNy or
Coil Box Installed on a Combustib{e Floor
16
[TNIT MAY NOT OPERATE
Failure to %ltow this caution may result in intem_ittent unit
operation.
Do not bend duct flanges inward as shown in Fig 2! This
will affect airflow across heat exchangers and may cause limit
cycling or premature heat exchanger _itilure, Remove duct
flange completely or bend it inward a minimum of 2!0 ° as
shown in Fig, 21
NOTE: For 140 size unit when installed in downflow orientation,
cut the white jumper wire offbetween terminals PL]-7 and PLI=9.
Do not cut white jumper between tem_inals PLI=7 and PLI-11.
Refer to Fig. 30 _br location of jumper (ut jumper close to
connector and remove wire to avoid a short circuit
Step a--installation in Horizontal Applications
UNIT MAY NOT OPERATE
Failure to _bltow this caution may result in intem_ittent unit
operation.
The entire length of _i/rnace MUST be supported when
furnace is used in a horizontal position to ensure proper
draining. When suspended, bottom brace supports sides and
center blower shelf When unit is supported fi'om the ground,
blocks or pad should support sides and center blower shelf
area.
These fmnaces can be installed horizontally in either horizontal
te_ or right discharge position. In a crawlspace, t'm'nace can either
be hung from floor joist or installed on suitable blocks or pad.
Furnace can be suspended flora each corner by hanger bolts and