Figure 47: Power wiring bottom entry location
Item Description
A Bottom entry patch plate
B Open control box door
Thermostat wiring
Install the thermostat on an inside wall
approximately 56 in. above the floor. The
thermostat must not be subject to drafts, sun
exposure, or heat from electrical fixtures or
appliances.
Follow the manufacturer's instructions enclosed
with thermostat for the general installation
procedure. Use color-coded, insulated wires
to connect the thermostat to the unit. See the
following table for control wire sizing and maximum
length.
Table 6: Control wire sizes
Wire size
1
Maximum length
1
18 AWG 150 ft
1 From the unit to the thermostat and back to the unit.
CAUTION
The control transformers in 208/230-3-60 units are
factory wired for 230 V and 415 V power supply
respectively. Change the tap on the transformer for
208-3-60 operation. See the unit wiring diagram.
Installation Manual: YORK
®
Sun
™
Select YV28 to YV50
33
Johnson Controls Ducted Systems
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