66389-BIM-C-1208
Johnson Controls Unitary Products
15
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 15. 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.
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.
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 thermo-
stat to the unit. Refer to Table 7 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
No. 70 – Latest Edition (in U.S.A.), current Canadian Electri-
cal 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 com-
pressor terminals during starting and running conditions are
indicated on the unit Rating Plate and Table 1.
FIGURE 13 - RETURN DOWNFLOW PLENUM WITH
PANEL
FIGURE 14 - DISCHARGE PANEL IN PLACE
FIGURE 15 - CONDENSATE DRAIN
O P T I O N A L C O I L
G U A R D
3 " M i n i m u m
Do not loosen the compressor mounting bolts.
Make sure that panel latches are properly positioned
on the unit to maintain an airtight seal.
TABLE 7:
CONTROL WIRE SIZES
Wire Size
Maximum Length
1
1.
From the unit to the thermostat and back to the unit.
18 AWG
150 Feet
