Carrier 59SU5A Manual page 17

59SU5A: Installation, Start-up, Operating and Service Maintenance Instructions
Furnace
Coil
20--- 1/2"
Furnace
Representative drawing only, some models may vary.
Cabinet Size
17-in.
21-in.
Fig. 26 – Dimensions of 8-in. Tall Metal Spacer
NOTE: The allowable use of the 8-in. spacer demonstration
and Fig. 26). The spacer may taper to accommodate different
coil/furnace width combinations but must always keep an 8-in.
minimum height if used. Space between the top of the furnace casing
and the bottom of the coil.
NOTE: When the indoor coil is placed in an unconditioned space,
insulation should be applied and wrapped around the outside of coil
casing, 8-in. adapter and supply duct contact point.
1. Create field fabricated adapter (if needed,
2. If adapter is needed, place field fabricated adapter on furnace.
Adapter should be tapered to fit coil/furnace combination when one
of them is larger than the other.
3. Set coil on adapter.
4. Ensure coil is level for proper condensate drainage. In upflow
application, do not tip coil toward condensate drain. In the
horizontal application, ensure coil cabinet is level side to side and
front to back. It is allowable to add up to 1/2-in additional slope
over length and depth of coil cabinet in the direction of drain pan
connection.
5. Attach coil casing to furnace using sheet metal screws. If 8-in.
spacer is required, attach coil casing to spacer and attach spacer to
furnace using sheet metal screws.
6. Seal joints between coil casing, adapter (if needed,
furnace to create an air tight seal using locally approved materials.
Upflow Installation
NOTE: The furnace must be pitched for proper condensate drainage
(see Fig. 31).
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.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
8
"
Coil Spacer
B
A190301
Dimension "B"
17-1/2-in.
21-in.
(Table 6
Table 6).
Table 6), and
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.
PERFORATED
DISCHARGE DUCT
FLANGE
UPFLOW
90°
120°
MIN
Fig. 27 – Duct Flanges
NOTE: Coil offset kits do not meet the 8-in. separation between the coil
pan and furnace if required
extension to achieve an 8-in. total separation is required.
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. 28 and Fig.
17
Fig. 27). The supply-air
HORIZONTAL
90°
YES
YES
YES
YES
120°
MIN
NO
NO
(Table 6). Additional metal shield or an
WARNING
29).
A190216