Supply Air Connections; Upflow And Horizontal Furnaces; Downflow Furnaces - Carrier 58CVA 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.)
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.
UPFLOW
90
120
MIN
NOTE: For horizontal applications, the top most flange may be
bent past 90_
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
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.
DOWNFLOW
YES
YES
120
MIN
NO
Fig. 14 - - Duct Flanges
14
to allow the evaporator coil to hang on the flange
the factory- -approved
HORIZONTAL
90
YES
YES
120
MIN
NO
accessory subbase, or a
YES
YES
NO
A02020