95
230 V connections
L
N
PE
STB
PE
STB
N
L
LHS
NHS
1
2
PE
1
2
PE
1
3
2
1
3
2
L
N
PE
MAX
250VAC/5A
N
PE
Y1Y2 PE
N
PE
2
1
L
PE N
N
PE
STB
HS
Y1Y2 PE
MAX
250VAC/5A
M
1 ~
N
N
M
1 ~
Fig. 62
sL
Boiler circ pump
fÖ
Power supply 230 V, 50 Hz
gÖ
A Central fault message
gF
Ignition
jL
Enable additional heat source
a-Ö
Flue gas fan
aBÖ
High limit safety cut-out and ON/OFF switch
aBS
Low water indicator
aBD
Water pressure switch
a;A
Cylinder valve
a;S
Boiler valve
Connectors
a;A
and
a;S
a;A
buffer cylinder control valve
Valve connection
Plug connection
Colour
Description
N
N
Blue
Neutral conductor
Y2
L2
White
Actuating signal CLOSE (230 V AC)
Y1
L1
Black
Actuating signal OPEN (230 V AC)
Connection and wiring diagram
Connection and wiring diagram
(cont.)
5777 985 GB
Appendix