Supply Air Connections; Upflow And Horizontal Furnaces - Carrier 140/E Series Installation, Start-Up, Operating And Service And Maintenance Instructions

Supply Air Connections

For a furnace not equipped with a cooling coil, the outlet duct
shall be provided with a removable access panel. This opening
shall be accessible when the furnace is installed and shall be of
such a size that the heat exchanger can be viewed for possible
openings using light assistance or a probe can be inserted for
sampling the air stream. The cover attachment shall prevent leaks.

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.)
UPFLOW
90û
120û
MIN
OUTER DOOR
ASSEMBLY
8" (203 mm) MIN FOR
DOOR REMOVAL
(2) HEX NUTS, (2) WASHERS & (2) LOCK WASHERS
REQ. PER ROD
D OWNFLOW
YES
YES
120û
MIN
NOT
RECOMMENDED
Fig. 14 - - Duct Flanges
Fig. 15 - - Horizontal Unit Suspension
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_ to allow the evaporator coil to hang on the flange
temporarily while the remaining attachment and sealing of the
coil are performed.
HORIZONTAL
90û
YES
YES
120û
MIN
NOT
RECOMMENDED
1 " (6 mm) THREADED ROD
/
4
4 REQ.
SECURE ANGLE
IRON TO BOTTOM
OF FURNACE WITH
3 #8 x
TYPICAL FOR 2 SUPPORTS
1" (25 mm) SQUARE, 1 1 " x 1 1 " x
/ /
4 4
(32 x 32 x 6 mm) ANGLE IRON
OR UNI-STRUT MAY BE USED
14
YES
YES
NOT
RECOMMENDED
A02329
3 " (19 mm) SCREWS
/
4
1 "
/
4
A02345