Diagrams
7
3.4
Circuit voltages
LD1
LD2
LD3
F1
F2
K1
K3
K4
LD4
P4
X6
X1
X7
P5
SB1
X5
K2
X3
X2
X4
Electrical voltages with burner on
during c.h. or d.h.w. operation
only during
c.h.
operation
only during
d.h.w.
operation
Supply network
230~
230~
0
230~
230~
0
Pump
3 way
230~
Modulating
Gas valve
diverter valve
Safety
thermostat
0
Fan
230~
0
Air
pressure
switch