Condensate Drain; Compressors; Filters; Side Panels With Hole Plugs - York DM090 Installation Manual

127408-YIM-B-0606
When fastening ductwork to side duct flanges on
unit, insert screws through duct flanges only. DO
NOT insert screws through casing. Outdoor duct-
work must be insulated and water-proofed.
FIGURE 13 - SIDE PANELS WITH HOLE PLUGS
Note orientation. Panel is "insulation" side up.
FIGURE 14 - RETURN DOWNFLOW PLENUM WITH
PANEL
FIGURE 15 - DISCHARGE PANEL IN PLACE
Unitary Products Group

CONDENSATE DRAIN

The side condensate drain is reversible and maybe re-ori-
ented to the rear of the cabinet to facilitate condensate pip-
ing. A condensate drain connection is available through the
base pan for piping inside the roof curb. Trap the connection
per Figure 16: Condensate Drain. The trap and drain lines
should be protected from freezing.
Plumbing must conform to local codes. Use a sealing com-
pound on male pipe threads. Install condensate drain line
from the 3/4 inch (19 mm) NPT female connection on the unit
to an open drain.
FIGURE 16 - CONDENSATE DRAIN

COMPRESSORS

The compressors are mounted on elastomer insulators. The
mounting bolts have been fully tightened for shipping.
Do not loosen the compressor mounting bolts.

FILTERS

Two-inch filters are supplied with each unit. One-inch filters
may be used with no modification to the filter racks. Filters
must always be installed ahead of evaporator coil and must
be kept clean or replaced with same size and type. Dirty fil-
ters reduce the capacity of the unit and result in frosted coils
or safety shutdown. All units use four (4) 20"x25"x2" filters.
The unit should not be operated without filters properly
installed.
Make sure that panel latches are properly positioned
on the unit to maintain an airtight seal.
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