29
3-2
2
1
3
4
5
6
4
5
7
INSTALLERUSER
MAINTENANCE TECHNICIAN
For safety reasons the P.C.B. envisions a fuse
that cannot be restored in series with the electric
power supply of the gas valve.
3.2 230 V CIRCUIT WIRING DIAGRAM.
Key:
A2 - P.C.B.
A4 - Display board
E1 - Ignition electrode
E2 - Detection electrode
G2 - Igniter
M1 - Boiler circulator pump
M20 - Fan
M30 - ree-way valve (optional)
S1 - Main switch
X90 - Boiler conguration jumper
Y1 - Gas valve
Congure the corresponding parameters when
connecting in “simple cascade”, or when con-
necting in “system side ow probe”, or “D.H.W.
p u m p”.
1 - External reset (optional)
2 - Alarm.
Free contact Max. 230 Vac - 0,8 A Max. cosφ ≥ 0,6
3 - System side pump Potential.
Free contact Max. 230 Vac - 0,8 A Max. cosφ ≥ 0,6
4 - External relay (optional)
5 - Coil 230 Vac - Max. 0.1 A
6 - External pump (Driven by M1 pump)
7 - D.H.W. pump
Colour key:
BK - Black
BL - Blue
BR - Brown
G - Green
GY - Grey
OR - Orange
P - Purple
PK - Pink
R - Red
Y - Yellow
Y/G - Yellow / Green
W - White
W/BK - White / Black