Carrier F96CTN - Page 16

F96CTN and G96CTN (Series A): Installation, Start-up, Operating, Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
16
A11038
Fig. 23 – Horizontal Return Air Configurations
and Restrictions
Bottom Return Air Inlet
These furnaces are shipped with bottom closure panel installed in bottom
return-air opening. Remove and discard this panel when bottom return
air is used. To remove bottom closure panel, see Fig. 24.
A170123
Fig. 24 – Removing Bottom Closure Panel (2 Screws)
Side Return Air Inlet
These furnaces are shipped with bottom closure panel installed in bottom
return-air opening. This panel MUST be in place when only side return
air is used. Where required by code, seal bottom closure to furnace with
tape, mastic or other durable sealing method.
NOTE: Side return-air openings can be used in UPFLOW and some
HORIZONTAL configurations. Do not use side return-air openings in
DOWNFLOW configuration. See Fig. 21, Fig. 22, and Fig. 23.
Table 5 – Opening Dimensions - In. (mm)
* Not all families have these models.
HORIZONTAL TOP
RETURN NOT
PERMITTED FOR
ANY MODEL
1. Lay furnace on the back or side
2. Remove the two (2) screws that secure the bottom
closure panel to the furnace casing and remove the
panel
SCREWS (2)
BOTTOM
CLOSURE
Representative drawing. Models may vary.
FURNACE
CASING
WIDTH
IN. (mm)
APPLICATION
PLENUM OPENING FLOOR OPENING
A B C D
14–3/16{
(360)
Upflow Applications on Combustible or Noncombustible Flooring
(Subbase not required)
12-11/16
(322)
21-5/8
(549)
13-5/16
(338)
22-1/4
(565)
Downflow Applications on Noncombustible Flooring
(Subbase not required)
12-9/16
(319)
19
(483)
13-3/16
(335)
19-5/8
(498)
Downflow applications on combustible flooring
(Subbase required)
11-13/16
(284)
19
(483)
13-7/16
(341)
20-5/8
(600)
Downflow Applications on Combustible Flooring with coil assembly
coil or coil box (Subbase not required)
12-5/16
(319)
19
(483)
13-5/16
(338)
20
(508)
17–1/2
(445)
Upflow Applications on Combustible or Noncombustible Flooring
(Subbase not required)
16
(406)
21-5/8
(549)
16-5/8
(422)
22-1/4
(565)
Downflow Applications on Noncombustible Flooring
(Subbase not required)
15-7/8
(403)
19
(483)
16-1/2
(419)
19-5/8
(498)
Downflow applications on combustible flooring
(Subbase required)
15-1/8
(384)
19
(483)
16-3/4
(425)
20-5/8
(600)
Downflow Applications on Combustible Flooring with coil assembly
coil or coil box (Subbase not required)
15-1/2
(394)
19
(483)
16-1/2
(419)
20
(508)
21
(533)
Upflow Applications on Combustible or Noncombustible Flooring
(Subbase not required)
19-1/2
(495)
21-5/8
(549)
20-1/8
(511)
22-1/4
(565)
Downflow Applications on Noncombustible Flooring
(Subbase not required)
19-3/8
(492)
19
(483)
20
(508)
19-5/8
(498)
Downflow applications on combustible flooring
(Subbase required)
18-5/8
(473)
19
(483)
20-1/4
(514)
20-5/8
(600)
Downflow Applications on Combustible Flooring with coil assembly
coil or coil box (Subbase not required)
19
(483)
19
(483)
20
(508)
20
(508)
24-1/2
(622)
Upflow Applications on Combustible or Noncombustible Flooring
(Subbase not required)
23
(584)
21-1/8
(537)
23-5/8
(600)
22-1/4
(565)
Downflow Applications on Noncombustible Flooring
(Subbase not required)
22-7/8
(581)
19
(483)
23-1/2
(597)
19-5/8
(498)
Downflow applications on Combustible flooring
(Subbase required)
22-1/8
(562)
19
(483)
23-3/4
(603)
20-5/8
(600)
Downflow Applications on Combustible Flooring with coil assembly
coil or coil box (Subbase not required)
22-1/2
(572)
19
(483)
23-1/2
(597)
20
(508)