18
5
Key:
B3-2 - Zone 2 mixed flow probe
E7-2 - Low Temperature safety thermostat
M10-2 - Zone 2 pump
M31-2 - Zone 2 mixing valve
1 - Close
2 - Common
3 - Open
4 - Main panel
Colour code key:
BK - Black
BL - Blue
BR - Brown
G/Y - Green/Yellow
GY - Grey
OR - Orange
W - White
Y - Yellow
4
1
2
3
WIRING DIAGRAM.