WIRING DIAGRAM 2 x 2 Port zone valves (Typically Honeywell ‘S’ Plan)
W = White G = Grey Bl = Black O = Orange G/Y = Green/Yellow Br = Brown
L = Live N = Neutral C = Common SL = Switched Live E = Earth
2 Port (Heating)
Cutout (combined) duostat
2 Port (DHW)
WIRING DIAGRAM 3 Port + 2 Port (Typically Honeywell ‘Y’ Plan)
W = White G = Grey Bl = Black O = Orange G/Y = Green/Yellow Br = Brown
L = Live N = Neutral C = Common SL = Switched Live E = Earth
3 Port
mid position
Cutout (combined) duostat
2 Port (DHW)
C E 2 1
B r G B l O
G Y
1 2
3
B r G B l O
G Y
1 2
3
C
E 2
4
2
Wiring centre
3
1
3
5 6 7 8 9 10
1 2 3 4 5 6 7 8 9 10
E
L
Pump
N
2
Room stat
Boiler
Programmer
SL L
1 2
N
L N E
L N E
B r G B l O
G Y
2
3
C
E 2
C E 2 1
B r G B l O
G Y
1 2
3
4
2
Wiring centre
3
1
3
5 6 7 8 9 10
1 2 3 4 5 6 7 8 9 10
E
L
Pump
N
2
Room stat
Boiler
Programmer
SL L
1 2
N
L N E
L N E
1
