5567611-BIM-B-1218
22
Johnson Controls Ducted Systems
Filters
Two-inch filters are supplied with each unit. One-inch filters may
be used with no modification to the filter racks.
Always install filters ahead of evaporator coil. Keep the filters
clean and replace them 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.
Do not operate the unit 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 must be maintained at the compressor
terminals during starting and running conditions. The voltage
tolerances are indicated on the unit rating plate and in Table 2.
The internal wiring harnesses furnished with this unit are an
integral part of the design certified unit. Field alteration to
comply with electrical codes is not 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 used for these units. Factory-installed
disconnects are available. If you install a disconnect, you must
use a field supplied or Ducted Systems supplied accessory.
See Figure 4 for the recommended mounting location.
Note:
Not all local codes allow the installation of a disconnect
on the unit. Confirm compliance with local code before
you install a disconnect on the unit.
Electrical line must be sized properly to carry the load.
Note:
Use copper conductors only.
Each unit must be wired with a separate branch circuit fed
directly from the meter panel and properly fused.
See Figures 20 and 21 for typical field wiring. Refer to the
appropriate unit wiring diagram mounted inside the control
doors for control circuit and power wiring information.
Make sure that panel latches are properly positioned on
the unit to maintain an airtight seal.
208/230-3-60 units control transformers are factory
wired for 230v power supply. Change the tap on the
transformer for 208-3-60 operation. See the unit wiring
diagram.
Avoid damage to internal components if you drill holes to
install a disconnect.
When you connect electrical power and control wiring to
the unit, you must use water-proof connectors so that
water or moisture cannot be drawn into the unit during
normal operation. These water-proofing conditions also
apply when you install a field-supplied disconnect
switch.
