International comfort products A Series Installation Instructions Manual page 18

Connect supply- -air duct to flanges on furnace supply- -air outlet.
Bend flange upward to 90_ with wide duct pliers (Fig. 27). The
supply- -air duct must be connected to ONLY the furnace
supply- -outlet- -air duct flanges or air conditioning coil casing
(when used). DO NOT cut main furnace casing side to attach
supply air duct, humidifier, or other accessories. All supply- -side
accessories MUST be connected to duct external to furnace main
casing.
Representative drawing only, some models may vary.
Fig. 27 - - Duct Flanges
Representative drawing only, some models may vary.
Fig. 27 Duct Flanges (continued)
NOTE: Coil offset kits do not meet the 8 ---in. separation between the coil
pan and furnace if required (Table 6). Additional metal shield or an
extension to achieve an 8 ---in. total separation is required.
Return Air Connections
WARNING
!
FIRE HAZARD
A failure to follow this warning could cause personal injury,
death and/or property damage.
Never connect return- -air ducts to the back of the furnace.
Follow instructions below.
The return- -air duct must be connected to bottom, sides (left or
right), or a combination of bottom and side(s) of main furnace
18
casing. Bypass humidifier may be attached into unused return air
side of the furnace casing (Fig. 30 and Fig. 31).
Bottom Return Air
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 (Fig.
34).
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: For allowable side returns in horizontal configurations
(Fig. 31).
Leveling Legs (If Desired)
In upflow position with side return inlet(s), leveling legs may be
used. (Fig. 28). Install field- -supplied, 5/16 x 1- -1/2 in. (8 x 38 mm)
(max) corrosion- -resistant machine bolts, washers and nuts.
NOTE: Bottom closure must be used when leveling legs are used.
It may be necessary to remove and reinstall bottom closure panel to
install leveling legs. To remove bottom closure panel (Fig. 34).
To install leveling legs:
1. Position furnace on its back. Locate and drill a hole in each
bottom corner of furnace.
2. For each leg, install nut on bolt and then install bolt with
nut in hole. (Install flat washer if desired.)
3. Install another nut on other side of furnace base. (Install flat
washer if desired.)
4. Adjust outside nut to provide desired height, and tighten in-
side nut to secure arrangement.
5. Reinstall bottom closure panel if removed.
A190216
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care
and wear appropriate protective clothing, safety glasses and
gloves when handling parts, and servicing furnaces.
Specifications subject to change without notice.
Inlet
5/ 16

(8mm)
(8mm)
5/ 16

1 3 /

4
(44mm)
1 3 /

4
(44mm)
(8mm)
5 /

16
(8mm)
5/ 16

(44mm) 1 3/ 4

3/ 4
1

(44mm)
Fig. 28 - - Leveling Legs
CAUTION
!
A89014
440 01 4601 01