Carrier 59SC2E Installation, Start-Up, Operating And Service And Maintenance Instructions page 16

59SC2E: Installation, Start-up, Operating and Service and Maintenance Instructions
CAUTION
!
FURNACE RELIABILITY HAZARD
Failure to follow this caution may result in nuisance limit switch
cycling and unit component damage.
When a 17-1/2-in. wide upflow N coil is used with a 060M17--14
furnace, the N coil must either be raised using a transition piece at least
3-in. (76 mm) high or if a transition piece is not used, the refrigerant
lines must point to the front of the furnace casing.
NOTE: The furnace must be pitched as shown in
condensate drainage.
Fig. 19 – Furnace Pitch Requirements
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
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
PERFORATED
DISCHARGE DUCT
90°
FLANGE
120°
MIN
Fig. 20 – Duct Flanges
Return Air Connections
WARNING
!
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 can only be connected to bottom of the furnace. sides
(left or right), or a combination of bottom and side(s) of main furnace
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Fig. 19 for proper
Fig. 20. The supply-air
DOWNFLOW HORIZONTAL
90°
YES
YES
YES YES
120°
120°
MIN MIN
NO NO
casing. Bypass humidifier may be attached into unused return air
side of the furnace casing. See
Bottom Return Air Inlet
These furnaces are shipped with bottom closure panel installed in bottom
return-air opening. Remove and discard this panel when bottom return
air is used. To remove bottom closure panel, see
A11237
Fig. 21 – Upflow Return Air Configurations and Restrictions
YES
YES
Fig. 22 – Downflow Return Air Configurations
NO
A10493
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Fig. 22, Fig. 23, and Fig. 24.
Fig. 24.
and Restrictions
A11036
A11037