Specifications

035-17377-000 (0201) REV A
16 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 13. 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 NPT female connection on the unit to an
open 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
THERMOSTAT WIRING
The thermostat should be located on an inside wall approxi-
mately 56 inch above the floor where it will not be subject to
drafts, sun exposure or heat from electrical fixtures or appli-
ances. Follow the manufacturer's instructions enclosed with
thermostat for general installation procedure. Seven (7)
color-coded, insulated wires should be used to connect the
thermostat to the unit. Refer to Table 11 for control wire sizing
and maximum length.
POWER AND CONTROL WIRING
Field wiring to the unit, fuses, and disconnects must conform
to provisions of National Electrical Code (NEC), ANSI/NFPA
70 – Latest Edition, and/or local ordinances. The unit must
be electrically grounded in accordance with NEC ANSI/NFPA
– Latest Edition and/or local codes. In Canada, the unit must
conform to CSA C22.1.
Voltage tolerances which must be maintained at the com-
pressor terminals during starting and running conditions are
indicated on the unit Rating Plate and Table 5.
The internal wiring harnesses furnished with this unit are an
integral part of the design certified unit. Field alteration to
comply with electrical codes should not be required. If any of
the wire supplied with the unit must be replaced, replacement
wire must be of the type shown on the wiring diagram and the
same minimum gauge as the replaced wire.
A disconnect must be utilized for these units. Factory
installed disconnects are available. If installing a disconnect
(field supplied or York International

supplied accessory),
refer to Figure 4 for the recommended mounting location.
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 : CONDENSATE DRAIN
Make sure that panel latches are properly posi-
tioned on the unit to maintain an airtight seal.
TABLE 11: CONTROL WIRE SIZES
Wire Size
Maximum Length
*
*.
From the unit to the thermostat and back to the unit.
18 AWG
150 Feet
Avoid damage to internal components if drilling
holes for disconnect mounting.