10
Fig: 05. Schematic Wiring Diagram - Basic 2 x 2 port valve system
Fig: 06: Schematic Wiring Diagram - 2 port valve in conjunction with 3 port mid position valve system. (Y plan).
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.
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)
Cylinder terminal block
Room stat
Zone valve (DHW)
Junction box
3
2
3
L
N
Bl
GY
W G O
1 2 3
HTG
ON
DHW
ON
Pump
Boiler
3-port mid position valve
(DHW) 2-port
Programmer
Cylinder terminal block
(supplied fitted)
1
Room stat
3
NOTES:
1. A double pole isolating switch must be installed in the mains supply.
2. All earth connections must be linked back to the mains earth supply.
3. Assumes basic boiler with external pump.
4. Use copper links supplied to make connections between terminals.
5. Do not mount wiring centre on cylinder.
6. The above diagram is for guidance only.
KEY
Bl Blue
Br Brown
G Grey
O Orange
GY Green/Yellow
DHW Domestic Hot Water
HTG Heating
DHW
OFF
1 2 3 4 5 6 7 8 9
10
11 12 13 14 15 16
Bl Br G O GY
2
L
N
L
N
L N
