26
Instruction for the installer
3.13 - ELECTRICAL CONNECTIONS
The appliance’s electrical safety is guaranteed only when the
same appliance has been correctly earthed in compliance with
the regulations in force. The gas and water feeding pipes and
the CH system pipes cannot be used as ground plates.
Ensure that the above safety electrical requirements subsist;
in case of doubt, ask for a professionally qualified technician
to check the appliance’s electrical system.
UNICAL refuses responsibility for any damages arising from
failure to earth the boiler correctly.
It is necessary that a qualified technician verifies that the
electrical system is adequate to the appliance’s maximum
absorbed power, indicated on the data plate, verifying in
particular that the section of the system’s cables is suitable to
the appliance’s maximum absorbed power.
For the appliance’s general electrical supply the use of
adaptors, multiple sockets and/or extension cords is strictly
forbidden.
The use of any power supplied equipment implies the
observance of several fundamental rules, such as:
-
Do not touch the appliance with any wet part of your body
and/or barefooted;
-
Do not pull the supply cables;
-
Do not expose the boiler to sunlight, rain, etc., unless it is
explicitly foreseen;
-
Do not permit children or inexpert people to use the ap-
pliance.
Connection to mains supply 230V
The boiler is provided complete with a 1,5 m long, mains supply
cable, with a cross section area of 3x0,75 mm2.
The boiler’s electrical connections are shown in the section
named “WIRING DIAGRAMS” (paragraph 3.14 pages 30 and
31)
A mains supply of 230 V – 50 Hz is required. The wiring to the
boiler must be in accordance with the current CEI regulations.
DANGER!
The electrical connections must be carried
out only by a qualified engineer.
Before carrying out the connections or any
other operation on the electrical parts,
always switch off and disconnect the
electricity supply and ensure yourself that
it cannot be accidentally turned on.
Note: It is necessary to fit a double pole switch on
the electrical supply line, having a 3 mm contact
separation in both poles, in an easy accessible
position so as to ensure quick and safe servicing.
The replacement of the supply cable as to be carried out by a
qualified authorized UNICAL engineer, using
only original spare parts. The non-observance
of the above could compromise the appliance’s
safety.
Access to the electrical terminal block and external
connections
DANGER!
Switch off and disconnect the electricity
supply before carrying out any operations
on the electrical parts.
-
Remove the front panel.
-
To gain direct access to the connection areas remove the 4
screws
“A”
and remove the cover
“B”
.
Y1
Y2
1L 2N
1
2
3
4
5
6
7
3
4
View of the terminal board after having removed the front
cover
