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ELECTRICAL CONNECTIONS
WARNING!
Before you get access to terminals, all supply circuits must be dis-
connected.
The appliance is supplied with a power supply cable (should the lat-
ter need to be replaced, use only original spare parts supplied by the
manufacturer).
It is advisable to carry out a check on the electrical system to ver-
ify conformity to the regulations in force. Verify that the electrical
system can suitably withstand the water heater's maximum power
consumption values (refer to the data plate), in terms of the size of
the cables and their conformity to the regulations in force.
It is forbidden to use multiple outlet sockets, extension cables or
adaptors. It is forbidden to use piping from the water, heating and gas
systems for earthing the appliance. Prior to operating the machine,
make sure that the electricity mains voltage conforms to the value
indicated on the appliance's data plate. The manufacturer of the ap-
pliance shall not be held liable for any damage caused by failure to
earth the system or due to anomalies in the electric power supply.
To disconnect the appliance from the mains, use a bipolar switch
complying with all applicable CEI-EN regulations in force (minimum
distance between contacts 3 mm, switch preferably equipped with
fuses). The appliance must be connected in compliance with Europe-
an and national standards (NFC 15-100 for France). The main circuit
board on the appliance is fitted with an earth contact for operating
purposes only, not for safety purposes.
Open the cover to access the connection board located on the right,
rear side of the product and carry out the connections according to
the chosen configuration:
PERMANENT ELECTRICAL CONNECTION (24h/24h)
Use this configuration whenever users do not have a two-tier elec-
tricity rate. The water heater will always be connected to the power
supply network to ensure 24h operation.
AUX
SG2
SG1
ELECTRICAL CONNECTION WITH DUAL POWER SUPPLY AND
HC-HP SIGNAL (power supply 24h/24h)
It offers the same cost advantages as the two-tier rate configuration
but, additionally, it provides rapid heating thanks to the BOOST mode
that activates the heating even with the HP rate.
1) Connect a bipolar cable to the appropriate signal contacts on the
meter.
2) Connect the signal bipolar cable (B) to the appropriate EDF con-
nector "SG1" which is inside the connection box (make a hole in
the rubber plugs to create a suitable passage section).
WARNING: The EDF signal has a 230V voltage.
Permanent power supply (cable supplied with the appliance)
Signal HC-HP (cable not supplied with the appliance)
Signal AUX/PV/SG (cable not supplied with the appliance)
Signal BUS* (cable not supplied with the appliance)
* IMPORTANT: in the bus connection, to avoid interference problems, use a shielded cable or twisted pair cable.
28 /EN
N
A
L
3) Activate the HC-HP function through the P1 parameter in the in-
staller menu.
AUX
AUXILIARY CONNECTION
If you have a PV system to be connected or an SG signal available,
you can connect a bipolar cable from the inverter or the SG signal
cable (alternatively, not both) to the connection box (secure the cable
into the dedicated cabling sheath).
Connect this cable (C) to the connector called "SG2" and activate the
PV (P11) or SG (P13) function via the installer menu.
WARNING: signal 230 V.
Only for SYS or TWIN SYS models, if you have an auxiliary heat gen-
erator (e.g. boiler) and you would like to use it instead of the integra-
tion carried out by the heating element, you can connect a bipolar
cable (D) from the heat generator (if provided) to the product connec-
tion box (secure the cable into the dedicated cabling sheath).
Connect the cable to the connector called "AUX" and set the P14
parameter to 1 via the installer menu.
AUX
N
16 A
If you connect the SYS version to the boiler/stove, it is advisable to
use upper sensor slot S3.
If you connect the TWIN SYS version to the boiler/stove, it is advis-
able to use sensor slot S4 for the lower heat exchanger and S3 for
the upper one).
If you connect the SYS or TWIN SYS versions to the solar control unit
(lower heat exchanger), you can use the lower sensor slot on its own
(S2) or both sensor slots (S2) and (S3/S4).
CABLE
3G ø min. 1.5 mm²
2G ø min. 1 mm²
2G ø min. 1 mm²
max. 50 m - 2G ø min. 1 mm²
SG2
SG1
N
L
D
C
SG2
SG1
N
A
L
H05VV-F
H05VV-F
H05VV-F
EDF
N
N
2 A
16 A
B
N
16 A
FUSE
B 16A
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