International comfort products R8MXL, Installation Instructions Manual

Page: 14 / 48

Specifications are subject to change without notice.
14
441 01 6100 02
Upflow and Horizontal Furnaces
Connect supply − air duct to flanges on furnace supply − air outlet.
Bend flange upward to 90
_
with wide duct pliers. (See Fig. 14.)
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 accessories
MUST be connected to duct external to furnace main casing.
NOTE : For horizontal applications, the top − most flange may be
bent past 90 degrees to allow the evaporator coil to hang on the
flange temporarily while the remaining attachment and sealing of
the coil are performed.
Downflow Furnaces
Connect supply
− air duct to supply − air outlet on furnace. Bend
flange inward past 90 _ with wide duct pliers. (See Fig. 14.) The
supply − air duct must be connected to ONLY the furnace supply
outlet or air conditioning coil casing (when used). When installed
on combustible material, supply − air duct must be connected to
ONLY the factory − approved accessory subbase or a factory −
approved air conditioning coil casing. DO NOT cut main furnace
casing to attach supply side air duct, humidifier, or other
accessories. All accessories MUST be connected to duct external
to furnace casing.
UPFLOW DOWNFLOW HORIZONTAL
YES
NO
NO
YES
YES
YES
NO
120

MIN
YES
120

MIN
YES
120

MIN
90

90

A02020
Fig. 14 − Duct Flanges
1 /
4
" (6mm) THREADED ROD
4 REQ.
SECURE ANGLE
IRON TO BOTTOM
OF FURNACE WITH
3 #8 x 3 /
4
" (19mm) SCREWS
TYPICAL FOR 2 SUPPORTS
1” (25mm) SQUARE, 1-1/4”x1-1/4”x1/8” (32x32x3mm)
ANGLE IRON OR UNI-STRUT MAY BE USED
(2) HEX NUTS, (2) WASHERS & (2) LOCK WASHERS
REQ. PER ROD
8" (203mm) MIN
FOR DOOR REMOVAL
OUTER DOOR
A S SEMBLY
A10130
Fig. 15 − Horizontal Unit Suspension