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Installation instructions 0020140122_04
4.3
Electrical Installation
e
Danger!
Incorrect installation can cause electric
shock or appliance damage.
The electrical connection of the appliance
must be made only by a qualified engineer.
>
Ensure system is electrically isolated.
Protect the electrical installation by fol-
lowing the guidance indicated in the
“Technical data” chapter.
e
Danger!
>
The length of the power supply cable
must not exceed 10 metres.
>
The electrical installation in the dwelling must permit the
power supply to the equipment to be isolated by a dou-
ble pole isolation switch and be fused. The double pole
isolation switch must incorporate a gap of 3 mm between
the contacts.
>
Use a power cable suitable for the main connection, min-
imum 1.5 mm. If the cable is damaged, it must be
replaced by a qualified engineer.
The external wiring must be earthed, with correct polarity
and in accordance with current standards.
The manufacturer declines any responsibility for damages
to persons or others caused by the incorrect installation of
the appliance earthing. This includes failure to comply with
current standards.
b
Caution!
These pipes can become very hot which
will damage the cables or the system.
>
The electrical cables must not be
attached to or in contact with the hydrau-
lic pipes.
4.3.1 Description of connections
All of the internal connections are made directly to the cir-
cuit board.
2
3
1
Key
1
Cable clamp
2
Divisible wire grommet
3
Separating high and low voltage
The circuit board connectors are divided into two parts. The
left part accepts a 230 V power supply whereas the right
part is used for 24 V power.
230V connectors (High voltage)
230V~
CYL.
2
1
DHW
CH1
CH2
ON
DHW
OFF
1
2
-
+
BUS
NTC
230V~
CYL.
2
1
DHW
CH1
CH2
ON
DHW
OFF
1
2
3
4
5
Key
1
230 V supply connector (3 pins: earth / neutral / live)
2
Cylinder thermostat connector (2 pins)
3
Heating zone 1 valve (3 pins: earth/neutral/ live)
4
DHW valve ON (3 pins: earth / neutral / live)
5
DHW valve OFF - Heating zone 2 valve (3 pins: earth/neu-
tral/ live)
24V connectors (low voltage)
230V~
CYL.
2
1
DHW
CH1
CH2
ON
DHW
OFF
1
2
-
+
BUS
NTC
1
2
-
+
BUS
NTC
1
2
Key
1
eBUS connector (2 pins)
2
NTC connector (2 pins)
