998659-YIM-C-0614
Johnson Controls Unitary Products
17
Figure 22: Field Wiring Disconnect - Cooling Unit With/Without Electric Heat
Thermostat Wiring
The thermostat should be located on an inside wall
approximately 56 inch above the floor where it will not be
subject to drafts, sun exposure or heat from electrical fixtures or
appliances. Follow the manufacturer's instructions enclosed
with thermostat for general installation procedure. Seven (7)
color-coded, insulated wires should be used to connect the
thermostat to the unit. Refer to Table 7 for control wire sizing
and maximum length.
THREE
PHASE
POWER
SUPPLY
FACTORY OR FIELD
SUPPLIED DISCONNECT
GROUND
LUG
TERMINAL BLOCK TB1
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
208/230-3-60 and 380/415-3-50 units control
transformers are factory wired for 230v and 415v power
supply respectively. Change tap on transformer for 208-
3-60 or 380-3-50 operation. See unit wiring diagram.
