York ZR SERIES Specifications download pdf (Page 17)

567040-YIM-B-1210

Johnson Controls Unitary Products 17

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.

Figure 23: Typical Low Voltage Field Wiring

Table 7: Control Wire Sizes

Wire Size Maximum Length

1. From the unit to the thermostat and back to the unit.

18 AWG 150 Feet

THERMOSTAT

TERMINALS

( RCB )

REHEAT

CONTROL BOARD

OCC

HUM

TERMINAL BLOCK

Electronic programmable Thermostat 2ET0770010024

( includes subbase).

Terminals A1 and A2 provide a relay output to close the

outdoor economizer dampers when the thermostat

switches to the set-back position.

TO REMOTE SENSOR

2ET04701324 IF USED

DEHUMIDISTAT

Dehumidistat closes on rise in humidity.

OCC

( RCB )

REHEAT

CONTROL

BOARD

HUM

TERMINAL

BLOCK

DEHUMIDISTAT

Dehumidistat closes on rise in humidity.

TYPICAL

THERMOSTAT

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.

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York ZR SERIES Specifications Page 17

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