19
CONNECTION TO THE MAINS ELECTRICAL SYSTEM
For safe installation of the boiler it must also be
correctly connected to the mains electrical
supply in accordance with all applicable
regulations, and in particular it must be
connected to a suitable protective earthing
system.
The device is fitted with a three-core electrical
cable supplied without a plug. It must be
connected to the mains with a dedicated
connection via a dual-pole switch whose
contacts have an opening of at least 3 mm.
It is important to respect the correct polarity
(LIVE: brown cable / NEUTRAL: blue cable /
EARTH: yellow-green cable) when wiring in
the boiler. When installing or replacing the
power-supply cable, the earth conductor
must be left 2 cm longer than the others. If it
is necessary to completely replace the pre-
wired power-supply cable, it will be necessary
to access the PCB compartment:
For connecting or replacing conductors, use H05VV -F, H05VVH2-F CEI EN 60228 or better
rated cable.
• Cut power to the boiler using the power
switch installed before it.
• Remove the lower cover by removing the
four screws; turn the instrument panel to the
open position.
• Remove the rear case cover by unscrewing
the 4 screws.
• Identify the terminals next to the PCB (Pict.
25) and disconnect the live, neutral and
earth poles of the pre-wired cable; remove
the cable.
Connect the new cable in the same position
• Close the rear cover and screw it closed
• Return the panel to its operational position
and reposition the lower protection.
A qualified electrician should
check the suitability of the
protective earthing system. The
manufacturer is not responsible
for any damage caused by the
lack of a suitable earthing system.
Check that the electrical
connection is sufficient to satisfy
the boiler’s maximum power
consumption, indicated on the
boiler plate.
Extensions, adaptors or gang
sockets must not be used when
connecting the device to the
mains electrical system.
Before accessing the internal
components of the control panel,
make sure that the boiler is turned
off.
Fig. 25
