Upflow Installation; N Coil Installation; Supply Air Connections; Return Air Connections - Carrier 59SC2D Installation, Start-Up, Operating And Service And Maintenance Instructions

Horizontal Orientation
1. The condensate trap outlet extends 2- -in. (51 mm) below the
furnace casing. Leave enough clearance between the furnace
and the furnace platform for the trap.
2. To allow for servicing the trap, the condensate drain elbow
in the loose parts bag can be used to make a coupler to
allow for future service of the condensate trap and drain
line.
3. Remove the knock-out for the condensate trap in the side of
the casing.
4. Install the drain trap grommet in the casing if required for
direct- -vent applications. If necessary, remove the trap,
install the grommet and re-install the trap.
5. Remove the pre-formed rubber drain elbow, and two spring
clamps from the loose parts bag.
6. Connect the full or modified elbow and/or grommet to the
outlet of the condensate trap with one spring clamp. Avoid
misalignment of the drain pipe which may cause kinks in
the elbow or grommet.
7. The remaining drain line can be constructed from field- -
supplied 1/2- -in. CPVC or 3/4- -in. PVC pipe, in compliance
with local building codes. A factory- -supplied 1/2- -in.
CPVC to 3/4- -in. PVC adapter is supplied in the loose parts
bag for use as required.
8. Install the adapter or connect the 1/2- -in. CPVC pipe by
sliding a spring clamp over the open end of the elbow or
grommet on the outside the furnace casing.
9. Open the spring clamp and insert the long end of the
adapter or the 1/2- -in. CPVC pipe into the outlet stub on the
drain tube.
10. Connect additional condensate piping to a code- -approved
drain, or to a condensate pump approved for use with acidic
furnace condensate and compatible with mineral and
vegetable oils, such as canola oil.
Allow at least 1/4-in. per foot (20 mm per meter) of slope down
and away from the furnace in horizontal sections of drain line.
Fig. 18 - - Horizontal Drain Trap Grommet
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

N Coil Installation

When a 17- -1/2- -in. wide upflow N coil is used with a 060- -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 of the N coil must point to the front of the furnace
casing. Factory accessory 4- -3/4- -in. transitions are available.
Refer to the Product Data sheet for the current accessory transition
part number.
!
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
060- -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 Fig. 19 for
proper 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 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

A11582
!
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.
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 Fig.
24.
16
CAUTION
WARNING
A11237