International comfort products F8MVL Installation Instructions Manual page 15

LINE CONT A CT ONL Y PERMISSIBLE BETWEEN
LINES FORMED BY INTERSECTIONS OF
THE T OP AND TW O SIDES OF THE FURNA CE
JA CKET AND BUILDING JOISTS ,
STUDS , OR FRAMING.
EQUIPMENT MANU AL
SHUT -OFF GAS VA LV E
SEDIMENT
TRAP
Downflow Furnaces
Connect supply−air duct to supply−air outlet on furnace. Bend
flange inward past 90_ with wide duct pliers (See Figure 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
441 01 2122 01
Figure 17 − Typical Attic Installation
GAS
ENTR Y
17
SHEET
MET AL
22 "
UNION
Figure 18 − Upflow Return Air Configurations and Restrictions
UPFLOW RETURN AIR CONFIGURATIONS AND RESTRICTIONS
5 TONS AND
GREATER *
* 2000 CFM AND GREATER AT .6 ESP HI COOLING SPEED
Specifications are subject to change without notice.
TYPE-B
VENT
m m )
( 1 5 2
I N *
6 " M
30-IN . (762mm)
MIN WORK AREA
"
3 (451mm)
/
4
connected to ONLY the 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.
" (451mm)OVERALL
3
17 /
4
" (121mm) UNDER DOOR
3
4 /
4
1 " (25mm) UNDER FURNACE
EXTEND OUT 12 " (305mm)
FR OM FA CE OF DOOR
* WHEN USED W ITH
SINGLE W ALL VEN T
CONNECTIONS
A10164
15