York P2DP Series Installation Instructions Manual Download Page 7

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Supply Plenum Connection

Attach the supply plenum to the furnace
outlet duct connection flanges. This is
typically through the use of "S" cleat
material when a metal plenum is used.
The use of an approved flexible duct
connector is recommended on all instal-
lations. This connection should be
sealed to prevent air leakage.

If a matching cooling coil is used, it may
be placed directly on the furnace outlet
and sealed to prevent leakage. Follow

the coil instructions for installing the supply plenum.

On all installations a removable access panel should be pro-
vided in the outlet duct such that smoke or reflected light would
be observable inside the casing to indicate the presence of
leaks in the heat exchanger. This access cover shall be at-
tached in such a manner as to prevent leaks.

Return Duct Connection

Return air may enter the furnace through the side(s) or bottom
depending on the type of application. See the specific type
application installation for details. Be sure to see the "Filters"
section of this instruction.

FILTERS (UPFLOW/HORIZONTAL)

All applications require the use of a filter. This may be through the
use of any of the following accessory or field supplied methods:

Internal Side Filter With Retainer - 1BF0302 (Upflow)

This provides a cleanable, high velocity type filter and
retainer hardware for mounting inside the furnace cabinet.

External Side Return Filter Rack - 1SR0301. (Upflow)

This provides a 16x25 cleanable, high velocity type filter
and attaches to the furnace side panel and the return air
duct. The filter may be easily replaced.

Internal Mount Bottom Return Filter Accessory (Upflow) -

1BF0301-304 This provides a cleanable, high velocity type
filter and retainer hardware for mounting inside the furnace
cabinet. This type filter requires removing the furnace
blower compartment cover to change the filter.

External Bottom Return/End Return Horizontal, Filter Rack

Accessory - 1HF0301-304 Provides a cleanable, high
velocity type filter and rack. Attaches to the end of the
furnace and provides duct flanges.

Field Supplied Filter and Mounting System.

A return air filter grille or duct mounted filter may be
provided. The following minimum sizes are recom-
mended.

NOTE: Air velocity through throw-away type filters may not

exceed 300 feet per minute. All velocities over this require
the use of high velocity filters.

Side Return

Locate and knock out the square corner locaters. These indi-
cate the size of the cutoff to be made in the furnace side panel
(see Figure 4).

Install the side filter rack following the instructions provided with
that accessory. If a filter(s) is provided at another location in the
return air system, the ductwork may be directly attached to the
furnace side panel.

NOTE: Some accessories such as electronic air cleaners and

pleated media may require a larger side opening.

CAUTION: All installations must have a filter installed.

The return duct may be attached to the furnace by "S-cleat",
bend tabs or other approved methods. Be sure to seal the duct
to the furnace to prevent air leakage.

Those applications over 1800 CFM require either return from
two sides, or bottom. For bottom only application, see data and
notes on page 21.

Where the return duct system is not complete, the return
connection must run full size to a location outside the utility
room or basement. For further details, consult Section 5.3 (Air
for Combustion and Ventilation) of the National Fuel Gas Code,
ANSI Z223.1, or CAN/CGA B149.1 or .2, Installation Code -
latest editions.

Bottom Return

Converting the furnace to open bottom return requires remov-
ing the bottom closure plate. Use the following steps.

1. Remove the upper access door and blower compart-

ment door.

FIGURE 4 - SIDE RETURN CUTOUT MARKINGS

IAMON

RECOMMENDED SIZE FOR FIELD SUPPLIED

HIGH VELOCITY FILTERS

Furnace CFM

FILTER

Size

Sq. inches