Payne PG92ESA Installation, Start-Up, Operating And Service And Maintenance Instructions page 22

N Coil Installation
When a 17- -1/2- -in. wide upflow N coil is used with a 42060
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.
NOTE: The furnace must be pitched as shown in Fig. 21 for
proper condensate drainage.
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
PERFORATED
DISCHARGE DUCT
FLANGE
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 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. 22, 23, and 24.
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.
27 and 28.
Side Return Air Inlet
These furnaces are shipped with bottom closure panel installed in
bottom return- -air opening. This panel MUST be in place when
only side return air is used. Where required by code, seal bottom
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. 19.
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.
UPFLOW
90°
YES
YES
120°
MIN
NO
Fig. 19 - - Duct Flanges
closure to furnace with tape, mastic or other durable sealing
method.
NOTE: Side return- -air openings can only be used in UPFLOW
configurations. Do not use side return- -air openings in
DOWNFLOW or HORIZONTAL configurations. See Fig. 22, 23,
and 24.
Leveling Legs (If Desired)
In upflow position with side return inlet(s), leveling legs may be
used. See Fig. 20. Install field- -supplied, 5/16 x 1- -1/2 in. (8 x 38
mm) (max) corrosion- -resistant machine bolts, washers and nuts.
NOTE: Bottom closure must be used when leveling legs are used.
It may be necessary to remove and reinstall bottom closure panel to
install leveling legs. To remove bottom closure panel, see Fig. 27
and 28.
To install leveling legs:
22
DOWNFLOW
YES
YES
120°
MIN
NO
1. Position furnace on its back. Locate and drill a hole in each
bottom corner of furnace.
2. For each leg, install nut on bolt and then install bolt with
nut in hole. (Install flat washer if desired.)
3. Install another nut on other side of furnace base. (Install flat
washer if desired.)
4. Adjust outside nut to provide desired height, and tighten in-
side nut to secure arrangement.
5. Reinstall bottom closure panel if removed.
HORIZONTAL
90°
YES
YES
120°
MIN
NO
A10493