York Sun Select YV28 - Power Wiring Detail

A disconnect must be used with these units. Factory
and field installed disconnects are available.
CAUTION
Avoid damage to internal components if you drill holes
to install a disconnect.
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 correctly 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 the following figures for typical field wiring.
Refer to the appropriate unit wiring diagram
mounted inside the control doors for control circuit
and power wiring information.
CAUTION
When you connect electrical power and control wiring
to the unit, you must use waterproof connectors
so that water or moisture cannot be drawn into the
unit during normal operation. These waterproofing
conditions also apply when you install a field-supplied
disconnect switch.
Power wiring detail
Units are factory wired for the voltage shown on
the unit nameplate. See the electrical data tables to
size power wiring, fuses, and the disconnect switch.
Power wiring is brought into the unit through the
side of the unit or the basepan inside the curb.
Figure 45: Field wiring disconnect
Units ship with a patch plate covering the power
wire entry locations on the unit side and unit base.
Figure 46 shows the side entry location and Figure
47 shows the base entry location. Remove the patch
plate for the desired entry location and route power
wires to the unit's main power terminal block.
Use caulk, gasket, and/or other means to create
a watertight seal around the power wires as they
enter the unit.
Figure 46: Power wiring side entry location
Item Description
A Side entry patch plate
B Control box door
Installation Manual: YORK
®
Sun
™
Select YV28 to YV50
32
Johnson Controls Ducted Systems