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WIRING DIAGRAMS
CONNECTED TO BOILER WITH PUMP OVER-RUN FACILITY
Programmable
Room Stat
E
N
L
1
1
2
BL BR GR OR
Red Plug - Heating 1
Table 5: Instruction for connection to a boiler with pump over-run facility.
1. Disconnect brown pre-wired pump flex from position 10
2. Reconnect brown pre-wired pump flex to position 12
3. Connect 5 core cables between boiler and wiring control centre to following positions:
Wiring Centre
Boiler
Terminal 1
Permanent Live
Terminal 3
Permanent Neutral
Terminal 5
Permanent Earth
Terminal 10
Switched Live To Boiler
Terminal 12
Switched Live To Pump
(CONTINUED)
Two Channel Programmable
Room Stat With DHW Control
2
3
E
N
L
3
4
5
3
4
5
6
7
BL BR GR OR
Yellow Plug - Heating 2
Wiring Diagram for Twin Zone Heating and Hot Water
systems using boiler to control pump
L
N
E
SL B
L P
Green Plug
0
W
Y
G/Y
8
9
10
11
12
L
N
Boiler with over run
B1
Br Gr Or
Blue Plug - Water
Green Storage WB Range
Installation & Maintenance Instructions
G/Y
B1
Br
Pump
E SLB LP
17
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