York R-410A manual W1 W2 Y1 Y2 G R C, W1 W2 Y1 G OCC P P1 Y2 X R SD C

251934-YTG-G-0708

ZF180-300 Typical Control Diagram

THERMOSTAT

TERMINALS

CONTROL TERMINAL BLOCK

W1

W2

Y1

Y2

G

R

C

4

RC

1

2

5

W1

W2

Y1

G

OCC

P

P1

Y2

X

R

SD

C

Smoke

Detector

RJumper 3

SD

OCC

SD

24 VAC

6

X

TERMINALS ON

ALIMITED NUMBER OF

THERMOSTATS

1Second stage heating not required on single stage heating units.

2Second stage cooling not required on single stage cooling units.

3Jumper is required if there is no Smoke Detector circuit.

4Jumper is required for any combination of R, RC, or RH.

5OCC is an output from the thermostat to indicate the Occupied condition.

6X is an input to the thermostat to display Error Status conditions.

C

Class 2

Johnson Controls Unitary Products 95