31
Instruction for the installer
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 37)
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.
Reset button with calibration function
WARNING!
Function reserved exclusively to the
Authorized Service Centres!
Operation at the maximum output
Rotate the HEATING temperature adjustment knob “B” to its
maximum setting and
subsequently push the reset
button for 3 s. (release
when the steady wrench
appears on the display).
The symbols (M) and (F) are ON. The boiler is forced in
operation at its maximum output so that the calibration
operations and the combustion analysis can be performed.
Maximum output:
(symbol wrench = steady and symbol
radiator = steady)
MAX
M
I
N
MAX
M
I
N
°C
°C
3.15 - 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.
Operation at the minimum output
Rotate the HEATING temperature adjustment knob “B”
between the sun and its minimum setting:
the boiler operates at minimum output.
Minimum output:
(symbol wrench =
steady and symbol
radiator = flashing)
The function calibration remains active for 15 s.
To deactivate the function CALIBRATION before 15 s are
elapsed, push again the reset button for 3 s.
Warning:
If the rest button “D” is kept depressed for more
than 6 s the symbol wrench disappears
and, when released, it is not possible to enter
the special function mode.
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