Ariston VELIS WiFi 30 Instrucciones Para La Instalación, El Uso, La Manutención página 29

Startup and commissioning
Before powering up the appliance, fill 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 flanges, from the by-pass pipe, tighten down the bolts not too much, if neces-
sary ( Fig.5, Rif.C) and/or the rings (Fig.5).
Power the appliance by actuating the switch.
MAINTENANCE (FOR QUALIFIED PERSONNEL)
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.
WARNING: disconnect the appliance from the mains before conducting any maintenance work.
Emptying the appliance
The appliance must be emptied if it is to be left unused for a long period and/or in premises subject to frost.
To drain the appliance, proceed as follows:
- disconnect the appliance from the electricity mains;
- close the cut-off valve, if installed (Fig. 2, Ref. D), or the main household water valve, if not;
- turn on the hot water tap (wash basin or bathtub);
- open the drain valve (Fig. 2, Ref.B).
Replacing parts (when necessary)
The electrical parts may be accessed by removing the cover (Fig. 7).
Intervene on the power board (Fig. 7, Ref. Z) by disconnecting the cables (Fig. 7, Ref. C,Y and P) and remove
the screws. Intervene on the controlpanel by f irst removing the power board (Fig. 7, Ref.Z). The display board
is attached to the product through two fixing side flaps (Fig.4a, Ref. A ) accessible from inside the lower cover.
Release the control panel fixing f laps using a flat screwdriver to pry upon the same (Fig.4b, Ref. A) and release
them from the pins, simultaneously push it outwards to free it from the seat. Repeat for both fixing f laps.
Pay special attention not to damage the plastic flaps as breaking them will not allow for correct assembly of the
panel inits seat, resulting in possible aesthetic defects. After removing the control panel, you can disconnect
the connectors of the rod carrying sensors and power board. Intervene on the rod carrying sensors (Fig. 7,
Ref. K) by disconnecting the wires (Fig. 7, 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, first drain the appliance (refer to the related paragraph).
Remove the bolts (Fig. 5, Ref. C) and remove the flanges (Fig. 5, Ref. F). The flanges are coupled to the
heating elements and anodes. During reassembly, make sure to restore the rod carrying sensors and the
heating elements to the original positions (Fig. 7 and 5). Make sure that the f lange 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 f lange gasket (Fig. 6, Ref. Z) every time it is disassembled.
CAUTION! Swapping the heating elements will cause the appliance to malfunction. Work on one element
at a time, and only disassemble the second one after the first one has been reinstalled.
Use only original parts from authorized service centres authorized by the manufacturer.
29 / EN