21
Instructions for the installer
3.11 - ELECTRICAL CONNECTIONS
General Warnings
The appliance’s electrical safety is guaranteed only when the
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 have been
implemented; in case of doubt, ask for a professionally qualified
engineer 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 elec-
trical system is adequate to the appliance’s maximum absorbed
power, indicated on the data plate, checking in particular that
the section of the system’s cables is suitable to the appliance’s
maximum absorbed power.
The use of adaptors, multiple sockets and/or extension cords
for the appliance’s general electrical supply is strictly forbidden.
The use of any power supplied equipment implies the observance
of he following fundamental rules:
• Do not touch the appliance with any wet part of your body
and/or barefooted;
• Do not pull the supply cables
• Do not permit children or inexpert people to use the appliance
Connection to mains electrical supply 230V
The general wiring diagrams are shown on page 23 and the
actual wiring diagrams on pages 24 & 25.
A mains supply of 230 V – 50 Hz is required. The wiring to the
boiler must be in accordance with the current IEC 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.
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.
WARNING!
- Before opening the control panel, position the switch
(11) in the “0”pos.
- Do not connect the control panel to loads that together
absorb more than 4A!
Approvals
The UNICAL panel board, code 36749 has
been CE approved, according to the EN 60335-1
Standard.
Data plate and Serial number
The panel board identification data plate is glued
on the base.
Use
This panel board must be used for operation of a
boiler destined to heating water to a temperature
that does not exceed boiling point when installed.
