York 251934-YTG-J-0910 Technical Manual page 93

ZJ/ZR/ZF180-300 Wiring Diagrams
ZJ180-300 Typical Control Diagram
THERMOSTAT
TERMINALS
W1
W2
1
Y1
Y2
Y3
Y4
G
R
C
3
RC
4
OCC
5
X
TERMINALS ON
A LIMITED
NUMBER OF
THERMOSTATS
Johnson Controls Unitary Products
1 Second stage heating not required on single stage heating units.
2
Jumper is required if there is no Smoke Detector circuit.
3
Jumper is required for any combination of R, RC, or RH.
4
OCC is an output from the thermostat to indicate the Occupied condition.
5
X is an input to the thermostat to display Error Status conditions.
CONTROL
TERMINAL
BLOCK
W1
W2
Y1
G
OCC
P
P1
Y2
X
R
SD
R
C
SD
EXPANSION
SD
BOARD
TERMINAL
C
BLOCK
Y3
Y4
251934-YTG-J-0910
Smoke
Detector
2
Jumper
24 VAC
Class 2
93