Zone Valve Wiring Diagrams
Wiring for 3 Wire Zone Valve
Low Voltage
120 Volts
Boiler
Connections
T
T
|
|
| 24v |
1 | 2 | 3 |
|
| Zone Valve | Hot Neutral | |
|
|
| 120v |
Wiring for 4 Zone Valve
® | ® |
20°160°
150°
15°140°
10° 
130° 120°
5°110°
Differential 
Temperature
LED
flashing green = calling for heat
solid green = at temperature
Pump/TT red = error | 24v |
Probe |
|
® | ® |
20°160°
150°
15°140°
10° 
130° 120°
5°110°
Differential 
Temperature
Motor
4 Wire Zone Valve
End Switch
24v
Hot 
Neutral 120v
LED
flashing green = calling for heat
solid green = at temperature
Pump/TT red = error | 24v |
Probe |
|
T T
To Boiler Connections/Circulator
15