Heat pump water heater - TECHNICAL INFORMATION FOR INSTALLERS
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The SYS and TWIN SYS versions have a ¾”G coupling for recirculation of the hydraulic system (if present).
The SYS version coil has two ¾”G couplings, upper (inlet) and lower (outlet), on which to connect an auxiliary source.
The TWIN SYS version has two coils on which to connect two different auxiliary generators (fig.15).
For the TWIN SYS version we recommend you connect any solar heating systems to the lower coil and the other heat
generator to the upper one.
WARNING! It is advisable to carefully wash the system’s pipes in order to remove any residues of screw
thread, welding or dirt which may hamper the correct operation of the appliance.
4.5 Electrical connections
Cable
Max current
Permanent power supply (cable supplied with the appliance)
3G 1.5mm
2
16A
EDF signal (cable not supplied with the appliance)
H05V2V2-F 2G min. 0.75mm
2
2A
PV/SG signal (cable not supplied with the appliance)
H05V2V2-F 2G min. 0.75mm
2
2A
AUX signal (cable not supplied with the appliance)
H05V2V2-F 2G min. 0.75mm
2
2A
WARNING:
Before you get access to terminals, all supply circuits must be disconnected
WARNING:
Is forbidden remove covers and do maintenance and / or electrical connections by unqualified personnel
The appliance is supplied with a power supply cable (should the latter 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 verify 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 appliance 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 comply with the European and national standards, and must be protected by a 30mA RCD.
The main circuit board on the appliance is fitted with an earth contact for operating purposes only, not for safety
purposes.
