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INSTALLATION
NOTICE
This furnace is certified to leak 2% or less of nominal air
conditioning CFM delivered when pressurized to 1- -in. water
column with all present air inlets, including bottom closure in
upflow and horizontal applications, air outlets, and plumbing
and electrical ports sealed.
Upflow Installation
NOTE: The furnace must be pitched as shown in Fig. 19 for
proper condensate drainage.
Fig. 19 - - Furnace Pitch Requirements
Representative drawing only, some models may vary.
Fig. 20 - - Duct Flanges
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.
Connect supply- -air duct to flanges on furnace supply- -air outlet.
Bend flange upward to 90_ with wide duct pliers. See Fig. 20. 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.
Return Air Connections
!
FIRE HAZARD
A 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.
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. Bypass humidifier may be attached into unused return air
side of the furnace casing. See Fig. 21, 22, and 23.
A11237
Fig. 21 - - Upflow Return Air Configurations and Restrictions
Fig. 22 - - Downflow Return Air Configurations
A10493
Fig. 23 - - Horizontal Return Air Configurations
16
WARNING
and Restrictions
and Restrictions
A11036
A11037
A11038
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