EN
9
Simple circuit for for domestic central heating
boiler with gravity fed hot water supply
This diagram is correct for mains operated
systems� The link wire L-3 must be tted by the
installer�
TOWERCHRON QM1 is ideally suited for controlling combination boilers� The following basic circuit
diagrams apply for the range indicated�
Room stat conversation chart
Wiring installation instruction (QM1)
N L
D S
neutral
room stat
D = demand
S = satisfy
neutral
220/240V
50 Hz AC
main supply
boiler pump
1 2 3 4
TOWER SS
E
E
N
4
C
O
M
1
D
E
M
2
S
A
T
TOWER SSTRS E 4 1 3
ACL TS 142 E 4 1 2
DRAYTON RTE E 4 1 2 3
HONEYWELL T 6160B 2 1 3 4
LANDIS&GYR RAD 5 4 6 2
SWITCHMASTER SRT2 5 1 3 2
SUNVIC TLX2259 E 4 3 1
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