EN
To disconnect the unit from the electrical supply use a bipolar, switch conforming to CEI-EN standards (contact
opening at least 3 mm, better if equipped with fuses).
The appliance must be earthed and the earth cable (which must be yellow-green and longer than that of the
phases) is xed to the terminal marked by the symbol
(G Fig. 7 and 8).
Before starting up the appliance, check that the power rating matches that given on the appliance nameplate. If
the appliance is not supplied with a power supply cable, choose one of the following installation modes:
- connection to mains with a rigid pipe (if the appliance has no cable clamp); use a cable with a minimum 3x1.5
mm2 section;
- with a exible cable (type H05VV-F 3x1.5mm2, 8.5 mm in diameter) if the appliance is supplied with a cable
clamp.
For proper operation at 50Hz or 60Hz, the product does not require any modication.
Startup and commissioning
Before powering up the appliance, ll the heater with mains water.
To do so, open the mains cock and the hot water tap until all the air has been vented from the boiler. Check for
water leaks from the anges, from the by-pass pipe, tighten down the bolts not too much, if necessary (C Fig. 5)
and/or the rings (W Fig. 7 and 8).
Power the appliance by actuating the switch.
NB: for models equipped with user interface shown in gure 10, if you carry out horizontal installation you need
to congure the correct display of the display by pressing the “mode” button and the “eco” button simultane
-
ously for 5 seconds.
MAINTENANCE REGULATIONS (for competent person)
CAUTION Observe all general warnings and safety standards listed at the beginning of
this text in full; all such instructions are obligatory.
All maintenance operations and service visits should be performed by a competent person (who have
the skills required by the applicable norms in force).
Before calling your Technical Servicing Centre, check that the fault is not due to lack of water or power failure.
Emptying the appliance
The appliance must be emptied if it is to be left unused in premises subject to frost.
When necessary, empty the appliance as follows:
- disconnect the appliance from the electricity mains;
- turn o the domestic mains tap;
- turn on the hot water tap (wash basin or bathtub);
- open the drain valve B (g. 2).
Replacing parts
The electrical parts may be accessed by removing the cover (Fig. 7 and 8).
Intervene on the power board (Ref. Z) by disconnecting the cables (Ref. C, Y and P) and remove the screws.
Intervene on the control panel by rst removing the power board (Ref. Z). The display board is attached to the
product through two xing side aps (A Fig. 4a) accessible from inside the lower cover.
Release the control panel xing aps using a at screwdriver to pry upon the same (A Fig. 4b) and release them
from the pins, simultaneously push it outwards to free it from the seat. Repeat for both xing aps. Pay special
attention not to damage the plastic aps as breaking them will not allow for correct assembly of the panel in its
seat, resulting in possible aesthetic defects. After removing the control panel, you can disconnect the connec
-
tors of the rod carrying sensors and power board. Intervene on the rod carrying sensors (Ref. K) by disconnecting
the wires (Ref. F) from the control panel and remove it from its seat, taking care not to excessively bend them.
During reassembly, make sure that all components are put back in their original positions.
To work on the heating elements and anodes, rst drain the appliance (refer to the related paragraph). Remove
the bolts (C Fig. 5) and remove the anges (F Fig. 5). The anges are coupled to the heating elements and ano
-
des. During reassembly, make sure to restore the rod carrying sensors and the heating elements to the original
positions (Fig. 5, 7 and 8). Make sure that the ange plate with the coloured writing H.E.1 or H.E.2, is mounted in
its position marked by the same writing.
We recommend replacing the ange gasket (Z Fig. 6) every time it is disassembled.
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