Carrier 59MN7B Installation, Start-Up, Operating And Service And Maintenance Instructions page 20

Upflow Installation
NOTE: The furnace must be pitched as shown in Fig. 18 for
proper condensate drainage.
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.
PERFORATED
DISCHARGE DUCT
FLANGE
SCREWS (2)
Representative drawing only,
some models may vary in appearance.
1 Lay furnace on the back or side
2 Remove the two (2) screws that secure the bottom
closure panel to the furnace casing and remove the
panel
Fig. 20 - - Removing Bottom Closure Panel (2 Screws)
Connect supply- -air duct to flanges on furnace supply- -air outlet.
Bend flange upward to 90_ with wide duct pliers. See Fig. 19.
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.
UPFLOW
90°
YES
YES
120°
MIN
NO
Fig. 19 - - Duct Flanges
BOTTOM
CLOSURE
A170123
20
DOWNFLOW
YES
YES
120°
MIN
NO
SCREWS (4)
BOTTOM
PLATE
Representative drawing only,
some models may vary in appearance.
1 Lay furnace on the back or side
2 Remove the four (4) screws that secure the bottom
plate to the furnace casing
3 Remove the bottom closure from the casing
4 Re--install the bottom plate to the furnace casing and
re--install the four (4) screws
Fig. 21 - - Removing Bottom Closure Panel (4 Screws)
HORIZONTAL
90°
YES
YES
120°
MIN
NO
A10493
A170124