8
Figure 2: Schematic wiring diagram - basic 2 x 2 port valve system
Figure 3: Schematic wiring diagram - 3 port mid position system
3.3 Electrical diagram(s)
L
1
N
2 3
HTG
ON
DHW
ON
L N
2 3
1
L
2
N
3 4 5 6 7 8 9 10
1 2 3 4 5 6 7 8 9 10
(Supply)
1 2 3
G W Bl
2
0
GY
3
G
1
Br Bl
2
0
L
N
Programmer
Boiler
Pump
Zone valve (HTG)
Terminal block
1 3 2
2
Room stat
Zone valve (DHW)
(supplied)
Junction box
NOTES: Control terminal numbering may differ from those shown.
Refer to instructions with controls selected.
A double pole isolating switch must be installed in the mains supply.
All earth connections must be connected back to the mains earth supply.
3
DHW
OFF
2
3
L
1
N
2 3
HTG
ON
DHW
ON
L N
2 3
1
L
2
N
3 4 5 6 7 8 9 10
1 2 3 4 5 6 7 8 9 10
(Supply)
1 2 3
G
1
Br Bl
2
0
GY
3
G
1
Br Bl
2
0
1 3 2
2
L
N
Programmer
Boiler
Pump
Zone valve (HTG)
Terminal block
Room stat
Zone valve (DHW)
(supplied)
Junction box
NOTES: Control terminal numbering may differ from those shown.
Refer to instructions with controls selected.
A double pole isolating switch must be installed in the mains supply.
All earth connections must be connected back to the mains earth supply.
3
2
3
