5188236-BIM-A-0316
Johnson Controls Unitary Products
13
Figure 12: Compressor Restraining Bracket
Filters
One or two-inch filters can be 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 filters
reduce the capacity of the unit and result in frosted coils or
safety shutdown. Refer to physical data tables, for the number
and size of filters needed for the unit. The unit should not be
operated without filters properly installed.
Power And Control Wiring
Field wiring to the unit, fuses, and disconnects must conform to
provisions of National Electrical Code (NEC), ANSI/NFPA No.
70 – Latest Edition (in U.S.A.), current Canadian Electrical
Code C221, and/or local ordinances. The unit must be
electrically grounded in accordance with NEC and CEC as
specified above and/or local codes.
Voltage tolerances which must be maintained at the
compressor terminals during starting and running conditions are
indicated on the unit Rating Plate and Table 1.
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 8 for the recommended mounting location.
NOTE:
Since not all local codes allow the mounting of a
disconnect on the unit, please confirm compliance with
local code before mounting a disconnect on the unit.
Electrical line must be sized properly to carry the load. USE
COPPER CONDUCTORS ONLY. Each unit must be wired with
a separate branch circuit fed directly from the meter panel and
properly fused.
Refer to Figure 13 for typical field wiring and to the appropriate
unit wiring diagram mounted inside control doors for control
circuit and power wiring information.
Do not loosen compressor mounting bolts.
Make sure that panel latches are properly positioned on
the unit to maintain an airtight seal.
Wire tie
(cut and remove)
Mounting bracket
top (remove)
Mounting bracket
base
Remove these
screws (2)
Compressor
208/230-3-60 and 380/415-3-50 units control
transformers are factory wired for 230v and 415v power
supply respectively. Change tap on transformer for 208-
3-60 or 380-3-50 operation. See unit wiring diagram.
Avoid damage to internal components if drilling holes for
disconnect mounting.
When connecting electrical power and control wiring to
the unit, water-proof connectors must be used so that
water or moisture cannot be drawn into the unit during
normal operation. The above water-proofing conditions
will also apply when installing a field supplied disconnect
switch.
