Installation In Horizontal Applications - Carrier 58MXA 170 Series Installation, Start-Up, And Operating Instructions Manual

FURNACE
CASING
WIDTH
Downflow Applications on Non-Combustible Flooring
Downflow Applications on Combustible Flooring Using
Furnace with or without CD5 or CK5 Coil Assembly or
17-1/2
Downflow Applications on Combustible Flooring NOT Using
Furnace with or without CD5 or CK5 Coil Assembly or
Downflow Applications on Non-Combustible Flooring
Downflow Applications on Combustible Flooring Using
Furnace with or without CD5 or CK5 Coil Assembly or
21
Downflow Applications on Combustible Flooring NOT Using
Furnace with or without CD5 or CK5 Coil Assembly or
Downflow Applications on Non-Combustible Flooring
Downflow Applications on Combustible Flooring Using
Furnace with or without CD5 or CK5 Coil Assembly or
24-1/2
Downflow Applications on Combustible Flooring NOT Using
Furnace with or without CD5 or CK5 Coil Assembly or
FURNACE
CD5 OR CK5
COIL ASSEMBLY
OR KCAKC
COIL BOX
COMBUSTIBLE
FLOORING
SHEET METAL
PLENUM
FLOOR
OPENING
Fig. 20—Furnace, Plenum, and Coil Assembly or
Coil Box Installed on a Combustible Floor
duct pliers or duct flange tool or hand seamers to bend flange back
and forth until it breaks off. Be careful of sharp edges. (See Fig.
21.)
Table 1—Opening Dimensions (in.)
APPLICATION
Upflow Applications
KGASB Subbase
KCAKC Coil Box
KGASB Subbase
KCAKC Coil Box
Upflow Applications
KGASB Subbase
KCAKC Coil Box
KGASB Subbase
KCAKC Coil Box
Upflow Applications
KGASB Subbase
KCAKC Coil Box
KGASB Subbase
KCAKC Coil Box
A96284
16
PLENUM OPENING
A
16 24–1/8
15-7/8
15-1/8
15-1/2
19-1/2 24-1/8
19-3/8
18-5/8
19
23 24-1/8
22-7/8
22-1/8
22-1/2
→
UNIT MAY NOT OPERATE
Failure to follow this caution may result in intermittent unit
operation.
Do not bend duct flanges inward as shown in Fig. 21. This
will affect airflow across heat exchangers and may cause limit
cycling or premature heat exchanger failure. Remove duct
flange completely or bend it inward a minimum of 210° as
shown in Fig. 21.
NOTE: For 140 size unit when installed in downflow orientation,
cut the white jumper wire off between terminals PL1-7 and PL1-9.
Do not cut white jumper between terminals PL1-7 and PLI-11.
Refer to Fig. 30 for location of jumper. Cut jumper close to
connector and remove wire to avoid a short circuit.
Step 3—Installation in Horizontal Applications
UNIT MAY NOT OPERATE
Failure to follow this caution may result in intermittent unit
operation.
The entire length of furnace 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 from the ground,
blocks or pad should support sides and center blower shelf
area.
These furnaces can be installed horizontally in either horizontal
left or right discharge position. In a crawlspace, furnace can either
be hung from floor joist or installed on suitable blocks or pad.
Furnace can be suspended from each corner by hanger bolts and
FLOOR OPENING
B C
16–5/8 24–3/4
19 16-1/2 19-5/8
19 16-3/4 20-3/8
19 16-1/2 20
20-1/8 24-3/4
19 20 19-5/8
19 20-1/4 20-3/8
19 20 20
23-5/8 24-3/4
19 23-1/2 19-5/8
19 23-3/4 20-3/8
19 23-1/2 20
D