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OUTER DOOR
ASSEMBLY
8" MIN FOR DOOR
REMOVAL
(2) HEX NUTS, (2) WASHERS & (2) LOCK WASHERS
REQ. PER ROD
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 accessory subbase KGASB0201ALL or a factory
approved air conditioning coil casing. DO NOT cut main furnace
casing to attach supply side air duct, humidifier, or other accesso-
ries. All accessories MUST be connected to duct external to
furnace casing.
Fig. 15—Horizontal Unit Suspension
14
" THREADED ROD
1
/
4
4 REQ.
SECURE ANGLE
IRON TO BOTTOM
OF FURNACE WITH
3 #8 x
3
TYPICAL FOR 2 SUPPORTS
1" SQUARE, 1
1
" x 1
1
" x
1
" ANGLE IRON
/
/
/
4
4
8
OR UNI-STRUT MAY BE USED
Return Air Connections
FIRE HAZARD
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.
Downflow Furnaces
The return-air duct must be connected to return-air opening
(bottom inlet) as shown in Fig. 19. DO NOT cut into casing sides
(left or right). Side opening is permitted for only upflow and most
horizontal furnaces. (See Fig. 19.) Bypass humidifier connections
should be made at ductwork or coil casing sides exterior to
furnace.
Upflow and Horizontal Furnaces
The return-air duct must be connected to bottom, sides (left or
right), or a combination of bottom and side(s) of main furnace
casing as shown in Fig. 18 and 20. Bypass humidifier may be
attached into unused return air side of the furnace casing. (See Fig.
18 and 20.)
Not all horizontal furnaces are approved for side return air
connections. (See Fig. 20.)
" SCREWS
/
4
A05027
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