26
Instructions for the installer
Y1
Y2
1L
2N 123456734
3.11 - ELECTRICAL CONNECTIONS
General Warnings
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 par-
ticular 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 adap-
tors, multiple sockets and/or extension cords is strictly forbid-
den.
The use of any power supplied equipment implies the obser-
vance 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 sup-
ply cable, with a cross section area of 3x0,75 mm
2
.
The boiler’s electrical connections are shown in the section
“WIRING DIAGRAMS” (paragraph 3.13 pages 31-32)
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 electri-
city supply and ensure yourself that it cannot
be accidentally turned on.
Access to the electrical terminal strip and ex-
ternal connections
DANGER!
Switch off and disconnect the electricity sup-
ply before carrying out any operations on the
electrical parts.
- Remove the front panel.
- To gain direct access to the connection areas remove the
8 screws and remove the upper and lower covers.
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 servi-
cing.
The replacement of the supply cable has to be
carried out by a qualified authorized UNICAL
engineer, using only original spare parts. The
non-observance of the above could compro-
mise the appliance’s safety.
View of the terminal strip after having removed the covers.
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