Typical Electronic Thermostat Field Wiring - York ZH078 Installation Manual

5167515-YIM-H-0518
THERMOSTAT
TERMINALS
W1
W2
1
Y1
Y2
G
R
3
C
RC
4
OCC
5
X
TERMINALS ON A
LIMITED NUMBER
OF THERMOSTATS
Second stage ot required on single stage he
1
Jumper is required if there is no Smoke Detector circuit.
2
Jumper is required for any co
3
OCC is an output from the thermostat to indicate the Occupied
4
X is an input to the thermostat to display Error Status condi ons.
5
Figure 24: Typical Electronic Thermostat Field Wiring
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.
20
CONTROL
TERMINAL
BLOCK
W1
W2
Y1
G
Y2
OCC
X
R
SD-24
C
g units.
of R, RC, or RH.
on.
C
24V
SD-24
Jumper Located on Harness
(If No Smoke Detector)
SD-R
24V Output
R
Smoke
Detector
24 VAC
Class 2
2
(If Smoke Detector Is Used)
Johnson Controls Ducted Systems