19
EN
5.12
Wiring diagram
230 V
50 Hz
L
N
VD
SS
TPA
SM1
SIA
SM2
SR
TRA
EAR
EV
F1
PI
V
FLM
CN6
CN5
CN3
CN17
CN4
CN1
CN15
CN14
CN13
CN12
CN11
2
3
VC
C
GND
IN
5V
GND
OUT
CN2
3 2
1
4
5
6
SE
TA
PA
CR
EXP
F2
3
1
C
R
CP
S
F3
BROWN
BLUE
BL
UE
BLA
CK
BLA
CK
BL
UE
RED
RED
RED
BLACK
GREEN
RED
ARANCIO
GREEN
WHITE
RED
RED
BLUE
BL
UE
BLA
CK
BROWN
BLA
CK
BL
UE
BROWN
BLUE
BRO
WN
GREEN
GREEN
BLA
CK
BLA
CK
BL
UE
BL
UE
GREEN
GREEN
BLA
CK
BLA
CK
L
Line
N
Neutral
F1
Fuse (3.15AT - 250V)
F2
Fuse (4AT)
F3
Fuse (2AT)
TRA
Ignition transformer
PI
System pump
V
Fan
EAR
Ignition / Detection electrode
EV
Gas solenoid valve
SS
Domestic hot water sensor
SM1-2
Dual sensor (thermal safety/
delivery)
FLM
Flow meter
VD
Diverter valve
TPA
Pressure transducer
TA
Air thermostat
PA
High pressure switch
SE
External sensor
SR
Return Probe
SIA
Air inlet probe
APS
Air pressure switch
EXP
Expansion card
CP
Compressor
CR
Remote control (instead of air
thermostat)
To connect the "Air Thermostat" or, alternatively the "Remote Control", remove the bridge between ter-
minals 5-6.
Fig. 14
m
CAUTION
Users must:
– Use an omnipolar cut-off switch, disconnect switch
in compliance with EN Standards
which ensures
complete cut-off in overvoltage category III conditions
(i.e. where there is at least 3 mm between the open
contacts)
.
– Respect the connections L (Live) - N (Neutral).
– Ensure that the special power cable is only replaced
with a cable ordered as a spare part and connected
by professionally qualified personnel.
m
CAUTION
Users must:
– Connect the earth wire to an effective earthing sys-
tem.
The manufacturer is not responsible for any dam-
age caused by failure to earth the appliance or failure
to observe the information provided in the wiring dia-
grams
.
d
IT IS FORBIDDEN
To use water pipes for earthing the appliance.
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