5703827-XIM-A-0319
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Johnson Controls Ducted Systems
Procedures that risk oil leakage include, but are not limited to, compressor replacement, repairing refrigerant leaks, and replacing
refrigerant components such as a filter drier, pressure switch, metering device, or coil.
Units are shipped with compressor mountings that are factory-adjusted and ready for operation.
Filters
Two-inch filters are supplied with each unit. Four-inch filters may be used with no modification to the filter racks. Filters must always
be installed ahead of the evaporator coil and must be kept clean or replaced with filters of the same size and type. Dirty filters reduce
the capacity of the unit and result in frosted coils or safety shutdown. See the physical data tables, for the number and size of filters
needed for the unit. The unit must 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.
Means for disconnection must be incorporated in the fixed wiring according to the wiring rules. The disconnect incorporated in the
fixed wiring must be provided and field installed by the installer.
Voltage tolerances which must be maintained at the compressor terminals during starting and running conditions are indicated on
the unit rating plate and in Table 1.
The internal wiring harnesses provided 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, the 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 used for these units.
NOTE:
Not all local codes allow the mounting of a disconnect on the unit. Confirm compliance with the applicable local code before
you mount 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.
CAUTION
Do not loosen compressor mounting bolts.
CAUTION
380/415-3-50 units control transformers are factory wired for 415v. Change the tap
on the transformer for 380v operation. See the unit wiring diagram.
CAUTION
Avoid damage to the internal components if you drill holes for the disconnect
mounting.
CAUTION
When you connect 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 also apply when you
install a field supplied disconnect switch.
