Grasslin Towerchron QM1 Installation And User Instructions Manual page 17

Gravity Hot Water / Pumped Heating System - Two Port Valve in D�H�W� with Room and
Cylinder Stats
Note: Only valves with "change over" end switches are suitable�
TOWERCHRON QM2
N L 1 2 3 4
EARTH
NEUTRAL
LINE
CYLINDER STAT
EARTH
COMMON
DEMAND
VALVE
GREEN/YELLOW
BLUE
N
BROWN
GREY
WHITE
ORANGE
EN
ROOMSTAT
EARTH
N NEUTRAL
COMMON
DEMAND
PUMP
EARTH
N
NEUTRAL
LINE
BOILER
SWITCHED LIVE
REFER TO BOILER
MANUFACTURER
17