
Diagrams
6
3.2
Circuit voltages
Electrical voltages with burner on
during c.h. or d.h.w. operation
only during
c.h.
operation
only during
d.h.w.
operation
230~
Safety
thermostat
0
Fan
0
Main circuit
LD1
LD2
LD3
F1
F2
F3
K1
K2
K3
K4
LD4
P6
T3
X1
X2
X3
X5
X6
X7
X10
X11
X12
X1
3
X17
X23
X24
P3
X14
X15
SB1
X16
X2
2
X9
Supply network
230~
Pump
230~
0
230~
0
3 way
diverter valve
230~
Gas valve
24~
Transformer
24=
230~
0
5=
D.h.w.
Flow switch
pressure switch