Ardesto EWH-100ACWMI - Инструкция по эксплуатации - Страница 14

EN

14

MAINTENANCE REGULATIONS (for qualified personnel) 

Before calling your Technical Servicing Centre, check that the fault is not due to lack of water or power failure. 
Caution: disconnect the appliance from the mains before conducting any maintenance work.

Setting the operating temperature  

For models without knob, temperature adjustment can be done removing the cap and using a screwdriver on the 

thermostat adjustment pin, following the drawing instructions. 

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: 

-   close the tap, if installed (

D Fig. 2), otherwise the central tap domestic power supply; 

-   turn on the hot water tap (wash basin or bathtub); 

-   open the drain valve 

B (Fig. 2). 

Replacing parts  

Remove the enclosure to access the electrical equipment.

To act on the thermostat it is necessary to disconnect it from the power cord and remove it from its holder.

Before handling the heating element and anode, empty the appliance.

Undo the 5 bolts (

C fig. 3) and remove the flange (F fig. 3). The heating element and anode are attached to the 

flange. During reassembly, make sure that the flange gasket, the thermostat and the heating element are put 

back in their original positions (Fig. 3).

We recommend replacing the flange gasket (

Z Fig. 4) every time it is disassembled.

Use only original parts from authorized service centres authorized by the manufacturer.

Periodical maintenance 

The heating element (

R fig. 4) should be descaled every two years (the frequency must be increased, if water 

is very hard) to ensure it works properly. If you do not wish to use a liquid descaler (in this case please read the 

safety data sheets of descaling), you can simply break off the deposit, taking care not to damage the heating 

element's cladding. The magnesium anode (

N fig. 4) must be replaced every two years, otherwise the decay of 

the warranty. In the presence of aggressive or waters rich in chloride it is recommended to check the status of 

the anode annually.

To remove this, disassemble the heating element and unscrew from the support bracket.

Bipolar safety device 

If the water overheats excessively, a safety circuit breaker (compliant with applicable national regulations) trips 

to cut off electricity to the heating element (both power supply phases); contact the Service Centre if this occurs. 

Thermoelectrical models 

All the instructions in the booklet are also valid for the thermoelectrical models. The only additional for these ap-

pliances is the connection to the central heating piping.

Connect the top thermal attachment of the heater to the rising column of the thermosiphon and the bottom at-

tachment to the descending column, fitting two taps between the same. The more accessible bottom tap, is used 

to disactivate the appliance from the system when the central heating is not used.  

USER INSTRUCTIONS

Operation and Regulation of the operating temperature 

On/Off

To the heater turn on and off use the external two-pole switch, do not turn on and off introducing or removing the 

power cord plug in/from the electrical power. 

The indicator light remains ON during heating.

Adjusting the operating temperature

For the models with knob, temperature adjustment can be done using it (as in the drawing instructions). 

For models without knob, temperature adjustment can only be done by qualified personnel.