ARISTON Classico4528 Electric Water Heaters Instruction Manual

: June 5, 2024
: Ariston

Table of Contents

GENERAL SAFETY INSTRUCTIONS
Symbols:
GENERAL SAFETY STANDARDS
Informative
General recommendations
TECHNICAL CHARACTERISTICS
INSTALLING NORMS (for the installer)
HYDRAULIC CONNECTION
MAINTENANCE REGULATIONS (for competent person)
USER INSTRUCTIONS
USEFUL INFORMATION
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

Electric water heaters

GENERAL SAFETY INSTRUCTIONS

CAUTION!

This manual is an integral part of the product. Keep it with
care with the appliance, and hand it on to the next user/ owner in case of change of property.
Read the instructions and warning in this manual carefully, they contain important information regarding safe installation, use and maintenance.
The appliance must be installed and commissioned by a qualified technician in accordance with local legislation and health and safety regulations. All power circuits must be shut off before you open the terminal block.
DO NOT use the appliance for any other than its specified use. The manufacturer is not liable for damage resulting from improper or incorrect use or failure to observe the instructions given in this manual.
Incorrect installation can result in damage to property and injury to persons and animals; the manufacturer is not liable for the consequences.
DO NOT leave the packaging materials (staples, plastic bags, expanded polystyrene, etc.) within the reach of children – they can cause serious injury.
The appliance may not be used by persons under 8 years of age, with reduced physical, sensory or mental capacity, or lacking the requisite experience and familiarity, unless under supervision or following instruction in the safe use of the appliance and the hazards attendant on such use. DO NOT permit children to play with the appliance. User cleaning and maintenance may not be done by unsupervised children.
DO NOT touch the appliance when barefoot or if any part of your body is wet.
Any repairs, maintenance, plumbing and electrical hookup must be done by qualified technicians using original spare parts only. Failure to observe the above instructions can compromise the safety of the appliance and relieves the manufacturer of any liability for the consequences.
The hot water temperature is regulated by a thermostat which also acts as a re-armable safety device to prevent dangerous overheating.
The electrical hookup must be done as indicated in this manual.
If the appliance is equipped with a power cord, the latter may only be replaced by an authorised service centre or professional technician.
Do not tamper with the overpressure safety device, if supplied together with the appliance; trip it from time to time to ensure that it is not jammed and to remove any scale deposits. In countries which have enacted EN 1487, the appliance’s intake pipe must be equipped with a safety device compliant with the said standard, calibrated to a maximum pressure of 0.7 MPa, including at least a cock, check valve, safety valve and hydraulic load cutout.
It is normal that water drip from the overpressure safety device and EN 1487 safety unit when the appliance is heating. For this reason one must install a drain, open to the air, with a continuously downwards sloping pipe, in an area not subject to subzero temperatures. Make sure to drain the appliance when it is out of service or in an area subject to subzero temperatures.
Make sure to drain the appliance when it is out of service or in an area subject to subzero temperatures.
Water heated to over 50° C can cause immediate serious burns if delivered directly to the taps. Children, disabled persons and the aged are particularly at risk. We recommend installing a thermostatic mixer valve on the water delivery line, marked with a red collar.
Do not leave flammable materials in contact with or in the vicinity of the appliance.

Symbols:

Symbol	Meaning
Failure to observe this warning may lead to injury – even fatal in certain

circumstances – to people.
| Failure to observe this warning can result in damage or injury, even serious in certain circumstances,to property, plants and animals
| Observe the product’s general and specific safety instructions.

GENERAL SAFETY STANDARDS

Ref.	Warning	Type of risk	Symbol

1
‘| Do not open the appliance or remove from| its installation. Electrocution hazard due to the presence of live electrical equipment.
Personal injury – burns caused by overheated components and wounds caused by sharp edges|
2| Do not start or stop the appliance by insert- ing/pulling the power plug.| Electrocution hazard due to damage to the power cord. its plug or the socket.|
3| Do not damage the power cord.| Electrocution hazard due to bare live wires.|
4| Do not leave objects on the appliance.| Personal injury due to objects falling off the appliance as a result of vibration.|
Damage to the appliance or other property due to objects falling off the appliance as a result of vibration.|
5| Do not climb onto the appliance.| Personal injury due to falling off the appliance.|
Damage to the appliance or other property due to the appliance itself detaching from its mounting.|
6| Do not clean the appliance without having first switched it off, pulled its power plug or shut off its power switch.| Electrocution hazard due to the presence of – live electrical equipment.|
7| Install the appliance to a solid wall which is| Danger of the appliance falling off the wall due to structural collapse. or noisy operation.|
8| Make the electrical hookup with cables of adequate cross-section.| Danger of fire due to overheating of under- sized electrical wires.|
9| Restore all safety and control functions after working on the appliance and check that they are operational before returning it to service.| Damage or blocking of the appliance due to . – – appliance
improper control.|
10| Drain all components containing hot water. us in the bleed cocks, before handling them.| Danger of burns.|
11| Descale the system as given in the product’s”safety sheer; when doing so, ventilate the room, wear safety clothing, make sure not to mix products, and protect the appliance itself and any adjacent objects.| Personal injury due to contact of the skin and eyes with acid, inhalation, or ingestion of noxious chemicals.|
Damage to the appliance and adjacent objects due to corrosion by acid.|
12| Do not use insecticides, solvents or aggres- sive detergents to clean the appliance.| Damage to plastic and painted parts and assemblies.|

Anti-legionella recommendations (European standard CEN/TR 16355)

Informative

Legionella are small rod shaped bacteria which are a natural constituent of all fresh waters. Legionaries’ disease is a serious pneumonia infection caused by inhaling the bacteria Legionella pneumophilia or other Legionella species. This bacterium is frequently found in domestic, hotel and other water systems and in water used for air conditioning or air cooling system. Hence the main intervention against the condition is prevention, through control of the organism in water systems. The European standard CEN/TR 16355 gives recommendations for good practice concerning the prevention of Legio-nella growth in drinking water installations but existing national regulations remain in force.

General recommendations

“Conditions for Legionella growth”. The following conditions encourage Legionella growth:

water temperature between 25 °C and 50 °C. To restrict the growth of Legionella bacteria, the water tem-perature shall be in a range that the bacteria will not grow or have minimum growth, wherever possible. Otherwise, it is necessary to disinfect a drinking water installation by means of a thermal treatment; ·
stagnation of the water. To avoid long periods of stagnation, the water in every part of the drinking water installation should be used or flushed at least weekly; ·
nutrients, biofilm and sediment within the installation including water heaters, etc. Sediment can support the growth of Legionella bacteria and it should be removed on a regular basis from e.g. storage systems, water heaters, non-flown through expansion vessels (e.g. once a year).

Regarding to this storage water heater, if

the product is switched-off for a period of time [months] or
the water temperature is kept constant in the range 25 – 50°C and the Legionella bacteria could grow in the tank. In such circumstances, reduce the proliferation of the bacteria by running a “thermal sanitisation cycle”. Water heaters are sold with software that allows a “thermal sanitisation cycle” to be run when it is activated in order to reduce the proliferation of Legionella in the tank. This cycle is suitable for domestic hot water systems and complies with the guidelines for the prevention of Legionella stipulated in Table 2 of standard CEN/TR 16355 (see below).

Table 2 – Types of hot water system

| Separate hot and cold water| Mixed hot and cold water
---|---|---
No storage| Storage| No storage upline
of the mixer
valves| Storage upline
of the mixer
valves| No storage upline
of the mixer
valves
No
circulation
of hot water| Circulation
of hot water| No
circulation
of mixed
water| Circulation
of mixed
water| No
circulation
of mixed
water| Circulation
of mixed
I.vater| No
circulation
of mixed
water| Circulation
of mixed
water| No
circulation
of mixed
water| Circulation of mixed water
Ref. in Annex C| C.1| C.2| C.3| C.4| C.5| C.6| C.7| C.8| C.9| C.10
Temperature| –| > 50 C e| in
storage
heater’| > 50 C e| thermal
disinfection”| thermal
disinfection’| in
storage
heater| > 50 C e
thermal
disinfection’| thermal
disinfection’| thermal
disinfection’
Stagnation| –| < 3 I b| –| < 31 b| –
–| < 3 I| –| < 3 I b| –| li 3 I
Sediment| –| | remove`| remove`| | –| remove`| remove`| –|
a Temperature > 55 C all day or at least 1h a day >60’C.
b Volume of water contained in the pipes between the circulation system and the mos distant tap.
c Remove the sediment rom the storage heater as required by local conditions, but no less frequently than once a year.
d Thermal disinfection for 20 minutes at 60 C, for 10 minutes at 65t or 5 minutes at 70 C at all delivery points at least once a week.
e The water temperature in the circulation circuit may not fall below 50’C.
– Not required

Electromechanical water heaters are sold with the thermal sanitisation cycle disabled (default setting). If, for some reason, any of the above “conditions in favour of the proliferation of Legionella” occurs, it is strongly recommended to enable this function according to the instructions found in this manual [see <<Activating the “thermal disinfection cycle” (anti- legionella)>>]. However, the thermal disinfection cycle does not kill all Legionella bacteria in the storage tank. It follows that if the function is disabled, the Legionella bacteria may reoccur.
Note: when the software performs the thermal sanitisation treatment, it is likely that the power consumption of the water heaters increases.
Electromechanical water heaters are sold with the thermal sanitisation cycle disabled (default setting). If, for some reason, any of the above “conditions in favour of the proliferation of Legionella” occurs, it is strongly recommended to enable this function according to the instructions found in this manual [see <<Activating the “thermal disinfection cycle” (anti- legionella)>>]. However, the thermal disinfection cycle does not kill all Legionella bacteria in the storage tank. It follows that if the function is disabled, the Legionella bacteria may reoccur.
Note: when the software performs the thermal sanitisation treatment, it is likely that the power consumption of the water heaters increases.

Caution: the water temperature in the tank can cause immediate serious burns when the software runs the thermal disinfection treatment. Children, disabled persons and the aged are particularly at risk of burns. Check the water temperature before taking a bath or shower.

TECHNICAL CHARACTERISTICS

For the technical specifications, refer to the nameplate (the nameplate is located next to the water intake/ outlet pipes).

Table 3 – Product information

Range| 30| 50| 80| 100
Weight (kg)| 16| 21| 27| 32
Installation| Vertical| I Horizontal| Vertical| I Horizontal| Vertical I| Horizontal| Vertical I| Horizontal
Model| Refer to the nameplate
aelec (kWh)| 3,096| 3,736| 7,290| 7,478| 7,527| 8,559| 7,714| 8,403
Clelec’ week’ smart (kWh)| 13,016| 14,417| 25,234| 26,631| 26,045| 28,656| 25,981| 28,316
Clelac’ week
(kWh)| 18,561| 22,882| 32,166| 37,027| 34,922| 41,815| 36,489| 42,196
Load profile| S| S| M| M| M| M| M| M
L wa| 15 dB
II wh| 39,0%| 36,6%| 40,0%| 40,0%| 40,0%| 39,9%| 40,0%| 40,0%
V40 (I)| –| –| 77| 65| 90| 90| 130| 102
Capacity (I)| 25| _ 25| –| –| –| –| –|

The power consumption data in the table and the other information given in the Product Data Sheet (Enclosure A to this manual) are defined in relation to EU Directives 812/2013 and 814/2013. The products without the label and the data sheet for water heaters and solar devices, stipulated in regulation 812/2013, are not intended to be used in such assemblies. The device is equipped with a smart function that allows you to adapt the consumption to the user profiles. If operated correctly, the device has a daily consumption of “Qelec*(Qelec,week,smart/Qelec,week)”less than that of an equivalent product with no smart function”. The data shown in the energy label refer to the product installed vertically.
This appliance is conforming with the international electrical safety standards IEC 60335-1 and IEC 60335-2-21. The CE marking of the appliances attests its conformity to the following EC Directives, of which it satisfies the essential requisites:

LVD Low Voltage Directive: EN 60335-1, EN 60335-2-21, EN 60529, EN 62233, EN 50106.
EMC Electro-Magnetic Compatibility: EN 55014-1, EN 55014-2, EN 61000-3-2, EN 61000-3-3.
RoHS2 Risk of Hazardous Substances: EN 50581.
ErP Energy related Products: EN 50440.

INSTALLING NORMS (for the installer)

CAUTION Observe all general warnings and safety standards listed at the beginning of this text in full; all such instructions are obligatory.
The appliance must be installed and commissioned by a qualified technician in accordance with established regulations and local health and safety regulations. The appliance heats water to a temperature below boiling point. It must be linked up to a mains water supply according to the appliance performance levels and capacity. Before connecting the appliance, it is first necessary to:

Check whether the characteristics (please refer to the data plate) meet the customer’s requirements.
Make sure the installation conforms to the IP degree (of protection against the penetration of liquids) of the appliance according to the applicable norms in force.
Read the instructions provided on the packaging label and on the appliance data plate.

Installing the appliance
This appliance was designed to be installed only inside buildings in compliance with the applicable norms in force. Furthermore, installers are requested to keep to the following advice in the presence of:

Damp: do not install the appliance in closed (unventilated) and damp rooms.
Frost: do not install the appliance in areas where the temperature may drop critically and there may be a risk that ice may form.
Sunlight: do not expose the appliance to direct sunrays, even in the presence of windows.
Dust/vapours/gas: do not install the appliance in the presence of particularly dangerous substances such as acidic vapours, dust or those saturated with gas. –
Electrical discharges: do not install the appliance directly on electrical supplies that aren’t protected against sudden voltage jumps.

In the case of walls made of bricks or perforated blocks, partition walls featuring limited static, or masonry different in some way from those stated, you first need to carry out a preliminary static check of the supporting system. The wall-mounting fastening hooks must be designed to support a weight that is three times higher than the weight of the water heater filled with water. Fastening hooks with a diameter of at least 12 mm (Fig. 3) are recommended. We recommend installing the appliance (A Fig. 1) as close as possible to the delivery points to minimise heat loss along the pipes. Local regulations may provide for restrictions on installation in bathrooms; observe any regulatory minimum distances. To facilitate maintenance, make sure there is a clearance of at least 50 cm inside the enclosure for access to the electrical equipment.

Multi-position installation
The product can be installed both vertically and horizontally (Fig. 2). During horizontal installation, rotate the appliance clockwise so that the water pipes are located to the left (cold water pipe at the bottom).

HYDRAULIC CONNECTION

Connect the water heater’s inlet and outlet with pipes or fittings that are able to withstand temperature in excees of 90 °C at a pressure exceeding that of the working pressure. Therefore, we advise against the use of any materials which cannot resist such high temperatures. Screw a “T” piece union to the water inlet pipe with the blue-collar. On one side of the “T” piece union, screw a tap for draining the appliance that can only be opened with the use of a tool (B fig. 2). On the other side of the “T” piece union screw the safety valve supplied (A fig. 2).
CAUTION! For those nations that have taken on European norm EN 1487, the pressure safety device pro- vided with the product does not comply with that norms. According to the norm, the device must have a maximum pressure of 0.7 MPa (7 bar) and have at least: a cut-off valve, a non-return valve, a control mechanism for the non-return valve, a safety valve, and a water pressure shut- off device.
Some countries may require the use of alternative safety devices, as required by local law; the installer must check the suitability of the safety device he tends to use. Do not install any shut-off device (valve, cock, etc.) between the safety unit and the heater itself. The device relief must be connected to a relief pipe that has a diameter at least identical to the one of the equipment connection. Use a funnel that creates an air gap of at least 20 mm and allows visual checks so that no personal injury, property damage or damage to animals will occur in case of safety device enabling. The manufacturer will not be held responsible for such damage. Connect the inlet of the pressure safety device to the cold water system using a flexible pipe, using a cut-off valve if necessary (D fig. 2). In addition, a water discharge tube on the outlet C fig. 2 is necessary if the emptying tap is opened. When tightening the pressure safety device, do not over-tighten and do not tamper with it. It is normal for water to trickle from the tap during the heating phase; for this reason, it is necessary to connect the drain, which must always be left exposed to the atmosphere, with a drainage pipe that is installed sloping downwards in a place with no ice. If the network pressure is closed to the calibrated valve pressure, it will be necessary to apply a pressure reducer far away from the appliance. To avoid any possible damage to the mixer units (taps or shower) it is necessary to drain any impurities from the pipes. The appliance must not be supplied with water of hardness less than 1 2°F, nor with especially hard water (greater than 25 °F); we recommend installing a water softener, properly calibrated and controlled – do not allow the residual hardness to fall below 15°F. Before using the appliance, we recommend filling its tank with water and draining it completely so as to remove any residual.

Electrical connection
Before performing any operations, disconnect the appliance from the electricity mains using the external switch.
Before installing the appliance it is recommended to thoroughly check the electrical system to verify compliance with established regulations; the manufacturer is not liable for damage caused by lack of grounding or anomalous power supply. Check that the system is suitable for the maximum power absorbed by the water heater (please refer to the data plate) and that the cross- section of the electrical connection cables is suitable and complies with current laws. The use of multiplugs, extensions, or adaptors is strictly prohibited. It is strictly forbidden to use the piping from the plumbing, heating, and gas systems for the appliance earthing connection. If the appliance is supplied with a power supply cable, should the latter need replacing, use a cable featuring the same characteristics (type H05VV-F 3×1.5 mm2, 8.5 mm in diameter. The power cord (H05 V VF 3×1.5 mm2 diameter 8.5 mm) must be positioned in the special seat in the back of the appliance until it reaches the terminal (M Fig. 7) then lock the individual wires, tightening the appropriate screws. Secure the power cord with the included cable clamp. 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 fixed to the terminal marked by the symbol (G Fig. 7).
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 3×1.5 mm2 section;
with a flexible cable (type H05VV-F 3×1.5mm2, 8.5 mm in diameter) if the appliance is supplied with a cable clamp.

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 necessary (C Fig. 5) and/or the rings (W Fig. 7). Power the appliance by actuating the switch.
NB: for models equipped with user interface shown in figure 9, if you carry out horizontal installation you need to configure the correct display of the display by pressing the “mode” button and the “eco” button simultaneously 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 off the domestic mains tap;
turn on the hot water tap (wash basin or bathtub);
open the drain valve B (fig. 2).

Replacing parts
The electrical parts may be accessed by removing the cover (Fig. 7). 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 first removing the power board (Ref. Z). The display board is attached to the product through two fixing side flaps (A Fig. 4a) accessible from inside the lower cover. Release the control panel fixing flaps using a flat 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 fixing flaps. Pay special attention not to damage the plastic flaps 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 connectors 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, first drain the appliance (refer to the related paragraph). Remove the bolts (C Fig. 5) and remove the flanges (F Fig. 5). 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 flange 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 flange gasket (Z Fig. 6) every time it is disassembled.
CAUTION! The reversal of the heating elements involves malfunction of the appliance. Work on one heating element at a time and remove the second only after replacing the first. Use only original spare parts.

Periodical maintenance
The heating element (R fig. 6) should be descaled every two years to ensure it works properly (R Fig. 6) approximately every two years (the frequency must be increased, if water is very hard). If you pre- fer not to use special liquids for this operation, simply crumble away the lime deposit without damaging the heating element. The magnesium anodes (N Fig. 6) must be replaced every two years (this does not apply to appliances with stainless steel boilers); however, the anode should be checked every year if the water is corrosive or chloride rich. To replace them, remove the heating elements and unscrew them from the brackets. The bypass pipe (X Fig. 7) is inspected in the event of fault due to its obstruction. To inspect it remove the two rings (W Fig. 7).
After routine or extraordinary maintenance, we recommend filling its tank with water and draining it completely so as to remove any residual impurities. Use only original spare parts supplied by the manufacturer’s authorised service centres.

Safety valve
Regularly check that the overpressure device is not jammed or damaged; if it is, remove any scale or replace it. If the device has a lever or knob, operate it to:

drain the appliance, if necessary
check its operation from time to time.

USER INSTRUCTIONS

CAUTION Observe all general warnings and safety standards listed at the beginning of this text in full; all such instructions are obligatory.

Advice for user

Avoid positioning any objects and/or appliances that could be damaged by water leaks beneath the water heater.
Should you not use any water for an extended period of time, you should:
➣ disconnect the appliance from the electrical supply by switching the external switch to “OFF”;
➣ turn off the plumbing circuit taps.
Hot water at above 50°C flowing out of the taps at the point of use could cause serious scalds or even death from burns. Children, the disabled and the elderly are more exposed to the risk of burns. It is strictly forbidden for the user to perform any routine or extraordinary maintenance. To clean the external parts use a damp cloth soaked in soap and water.

Adjusting the temperature and activating the functions
The product is set to “Manual” by default, with a temperature set to 70 °C and the function “ECO EVO” is active. In case of a power failure or if the product is switched off using the button ON/OFF (Ref. A), the last temperature set remains saved. Slight noise may occur during the heating phase due to the water being heated.

For models equipped with user interface shown in figure 8:
Switch the appliance on by pressing the ON/OFF button (Ref. A). Set the desired temperature by selecting a level between 40°C and 80°C using the ” + ” and ” – “. buttons. During the heating phase, the LEDs (Ref. 1-5) related to the temperature reached by the water remain on; the subsequent ones, until the temperature is set, flash progressively. If the temperature drops, for example due to water being drawn, the heating is automatically reactivated and the LEDs between the last one on (steady) and that related to the set temperature start to flash progressively again.
For models equipped with user interface shown in figure 9:
Switch the appliance on by pressing the ON/OFF button (Ref. A) During the heating phase, the lines on both sides of the display (Ref. C) remain on.
On first installation, the display must be oriented according to the installation of the product.
If vertical no action is required; if horizontal, the display must be oriented accordingly by pressing the “MODE” + “ECO” simultaneously for 5 seconds. Setting- changing local time.
To change local time, when the machine is first switched on, the product automatically prompts you to set the correct time; during subsequent use the “set” button must be held down for 3 seconds. To change current time, turn the knob and press the “set” button to confirm.
Repeat the operation to set minutes. Programming mode (Manual, Program 1, Program 2, Program 1 and 2).
On each touch of the “Mode” button a different operating mode is selected (indicated by the corresponding flashing writing: P1, P2, Man).
The selection of the functions is cyclical and follows this order: P1, P2, P1 and P2 together, manual, P1 new, etc. The programs “P1” and “P2” are set by default for the time bands 07:00 and 19:00 and at a temperature of 70 °C. “Manual” mode (symbol “Man” on).
Allows the user to set the desired temperature simply by turning the knob until the desired temperature is displayed (Ref. E) (the adjustment range is 40 °C – 80 °C) and in the display, you can see the number of showers available based on the related on icons . By clicking the set button, the setting is saved. Both during the temperature selection phase and in the heating phase you can display the waiting time (Ref. F) that the product will take to reach the temperature (Ref. E). The “Program 1” (writing “P1” on), “Program 2” (writing “P2” on), and “Program 1 and 2” (writing “P1” and “P2” on) allow you to program up to two-time bands of the day when you want to have hot water. Press the “mode” button until the writing related to the desired program starts flashing. Now set the time at which hot water is desired by turning the knob (select the time by 30 minutes increments). By pressing the “set” button, the time is saved. To set the water temperature to the desired level, turn the knob and press the “set” button to save the setting.
Press the “set” button to start appliance operation in “P1” or “P2” mode. If “P1 and P2” have been selected repeat the time and temperature setting for the second program. During the periods for which the use of hot water is not explicitly required, water heating is disabled. The individual programs “P1” or “P2” are equivalent and can be configured independently for greater flexibility. When one of the programming functions (“P1” or “P2” or “P1 and P2”) is enabled, the knob is disabled. If you want to change the parameters, you must press the “set” button. If one of the programming functions (“P1” or “P2” or “P1 and P2”) is used in combination with the “ECO” function (see paragraph “ECO EVO function”), the temperature is set automatically by the appliance and only the desired time bands for hot water availability can be set
NB: for any setting, if the user takes no action for 5 seconds, the system saves the last setting.

ECO EVO Function
The “ECO EVO” function is a software program that automatically “learns” user consumption levels, reducing heat loss to a minimum and maximising energy savings. The “ECO EVO” software consists of an initial saving period of a week, when the product begins to operate at the temperature set. At the end of this “learning” week, the software adjusts water heating according to the user’s real needs which are automatically identified by the appliance. The product guarantees a minimum reserve of hot water even during periods in which water is not withdrawn. The hot water demand learning process, continues even after the first week. The process achieves maximum efficiency after four weeks of learning. Activate the function by pressing the corresponding button, which will light up. In this mode, the manual selection of the temperature is possible, however changing it disables the “ECO EVO” function. Reactivate it by pressing the “ECO” button. Whenever the “ECO EVO” function or the product is turned off and on again, the function will continue to learn the levels of consumption. In order to guarantee proper operation of the program, it is recommended not to disconnect the appliance from the mains. An internal memory ensures data storage for up to four hours without electricity, after which all acquired data is cancelled and the learning process will begin from the start. Each time the knob is rotated to set the temperature, the “ECO EVO” function is automatically disabled and the relative writing turns off. The product continues to operate with the program selected, the ECO function is not active. To voluntarily cancel the acquired data, hold down the “ECO” button for more than 5 seconds. When the reset process is completed, “ECO” flashes quickly to confirm data cancellation

“Shower Ready” Display

For models equipped with user interface type shown in figure 8.
The product is equipped with an intelligent function to minimise water heating time. Regardless of the temperature set by the user, the icon “shower ready” will turn on as soon as there is enough hot water for at least one shower (40 litres of mixed hot water at 40 °C).
For models equipped with user interface type shown in figure 9.
The product is equipped with an intelligent function to minimise water heating time. Regardless of the temperature set by the user, the icon “shower ready” will turn on as soon as there is enough hot water for at least one shower (40 litres of mixed hot water at 40 °C). Upon reaching sufficient hot water for a second shower a second “shower ready” icon will light up and so on (the maximum number of showers depends on the ability of the model purchased).

Reset/Diagnostics

For models equipped with user interface type shown in figure 8.
When one of the malfunctions described above occurs, the appliance will enter its “fault status” and all LEDs on the control panel will flash simultaneously. Diagnostics: to enable the diagnostic function, hold the ON/OFF button (ref. A) for 5 seconds. The type of fault is indicated by five LEDs (Ref. 1-5) according to the following scheme:
LED. Ref. 1 – internal malfunction of the circuit board
LED Ref. 1 and 3 – internal malfunction of the circuit board (NFC communication or NFC data)
LED Ref. 3 – broken temperature probes (open or short-circuited) – boiler outlet
LED Ref. 5 – excessive water temperature detected by single sensor – boiler outlet
LED Ref. 4 and 5 – general excessive water temperature (circuit board fault) – boiler outlet
LED Ref. 3 and 4 – Failure to heat water with powered heating element – boiler outlet
LED Ref. 3, 4, and 5 – overheating caused by lack of water – boiler outlet
LED Ref. 2 and 3 – broken temperature probes (open or short-circuited) – boiler inlet
LED Ref. 2 and 5 – excessive water temperature detected by single sensor – boiler inlet
LED Ref. 2, 4 and 5 – general excessive water temperature (circuit board fault) – boiler inlet
LED Ref. 2, 3 and 4 – failure to heat water with powered heating element – boiler inlet
LED Ref. 2, 3, 4 and 5 – overheating caused by lack of water – boiler inlet Exit the diagnostic function by pressing the ON/OFF button (Ref. A) or wait for 25 seconds.
For models equipped with a user interface type shown in figure 9.
When any of the operation problems occur, the appliance goes into “fault status” and the corresponding error code flashes on the display (for example, E01). The error codes are the following:
E01 – internal error of the board
E04 – impressed current anode malfunction (corrosion protection is not guaranteed)
E09 – excessive number of resets in fifteen minutes
E10 – broken temperature probes (open or short-circuited) – boiler outlet
E11 – excessive water temperature detected by single sensor – boiler outlet
E12 – general excessive water temperature (circuit board fault) – boiler outlet
E14 – Failure to heat water with powered heating element – boiler outlet
E15 – overheating caused by lack of water – boiler outlet
E20 – broken temperature probes (open or short circuited) – boiler inlet
E21 – excessive water temperature detected by single sensor – boiler inlet
E22 – general excessive water temperature (circuit board fault) – boiler inlet
E24 – failure to heat water with powered heating element – boiler inlet
E25 – overheating caused by lack of water – boiler inlet
E61 – internal malfunction of the circuit board (NFC communication)
E62 – internal malfunction of the circuit board (NFC data damaged)
E70 – Limescale detected – Limited mode on
Error reset: reset the appliance by switching it off and on from the ON/OFF button (Ref. A). If the cause of the malfunction disappears immediately when reset, the appliance resumes its regular operation. On the contrary, if the error code continues to appear on the display: contact the Technical Service Centre.

Additional Functions
Time remaining
For models equipped with user interface type shown in figure 9.
The time remaining to reach the temperature set by the user (Ref. E) is shown in the centre of the display (Ref. F).
The value is indicative and is an estimate of the “time remaining” parameter. The value is automatically updated during the heating phase.

Anti-freeze function
The anti-freeze function is the appliances automatic protection to avoid damages caused by very low temperatures below 5 °C, in the event in which the product is turned off during winter. It is recommended that the product remains plugged in to the mains power, even if it is inactive for a long time.

For models equipped with user interface type shown in figure 8: the function is enabled, but not recommended if activated.
For models equipped with a user interface type shown in figure 9: the function is enabled; activation is displayed on the display with “AF”. For all models, once the temperature rises to a safer level such as to avoid damage from ice and frost, the water heating is switched off again.

Activating the “thermal disinfection cycle” (anti-legionella)
The anti-legionella function (disabled by default) consists of a water heating cycle at 65 °C which carries out a thermal disinfection action against the bacteria in question. If enabled, the appliance performs a heating cycle at 60 °C for 1 hour, every day. When the product is off, the anti-legionella function is not active. If the appliance is switched off during the anti- legionella cycle, the product turns off and the function is not completed. If the product is turned on again, the anti-legionella function is reactivated. At the end of each cycle, the operating temperature returns to the value set previously by the user.

For models equipped with user interface type shown in figure 8:
the activation of the anti-legionella cycle appears as a normal temperature adjustment 60 °C. Activate this function by pressing and holding both the “ECO” and “+” buttons for 4 s.; once activation is confirmed, LED 60°C (Rif.

will flash quickly for 4 s. Permanently deactivate the function by repeating the above steps; once the deactivation is confirmed, LED 40°C (Rif.
will flash quickly for 4 s.

For models equipped with a user interface type shown in figure 9:
during the “thermal disinfection cycle”, the display alternately shows the water temperature and “-AB-“. To activate/deactivate the function, with the working product, hold the “mode” button for 3 s. Set “Ab 1” (to activate the function) or “Ab 0” (to disable the function) using the knob and confirm by pressing the “set” button. To confirm activation/deactivation, the product returns to normal operation status.

Anti-limescale Function

The formation of limescale (calcium carbonate) inside the appliance (in particular on the heating elements) is linked to the characteristics of the water which may be more or less rich in calcium. It may cause increased noise in the heating phases and change the sensitivity of the sensors making the control performed by the electronic control unit more difficult. To decrease this phenomenon first check that the appliance installation conditions are those recommended (see paragraph “Hydraulic Connections”). The latter is therefore equipped with an “antilimescale function”: it is an automatic protection of the appliance to prevent excessive heating cycles caused by limestone on the heating element. Once the anti-limescale function starts to work, the temperature is lowered to 60 °C (if the temperature set was higher). If the anti-limescale function is activated, the ECO EVO function is disabled.

For models equipped with a user interface type shown in figure 8: the active status of the function is shown by flashing LEDs 1, 2 and 3.
For models equipped with a user interface type shown in figure 9: the active status of the function is shown on the display with E70 and “remaining time” that alternate every 3 seconds. The anti-limescale function cannot be disabled by the user, the product automatically resets the status once the problem is resolved (see paragraph “Scheduled maintenance”).

USEFUL INFORMATION

If the water comes out cold, have the following checked:

the presence of voltage on the power terminal block (M Fig. 7);
the circuit board;
the heating parts of the heating element;
inspect the bypass pipe (X Fig. 7);
the sensor holder rods (K Fig. 7).

If the water comes out boiling hot (steam in the taps)
Disconnect the appliance from the electricity supply and have the following checked:

the circuit board;
the amount of scale on the boiler and components;
the sensor holder rods (K Fig. 7).

If the hot water delivery is insufficient:
Have the following checked:

the pressure of the water mains;
the condition of the deflector on the cold water intake pipe;
the condition of the hot water pipe;
the electrical components.

Water trickling from the pressure safety device
During the heating phase, some water may trickle from the tap. This is normal. To prevent the water trickling, a suitable expansion vessel must be installed on the flow system. If the trickling continues even after the heating phase, have the following checked:

device calibration;
the pressure of the water mains.
Caution: Never obstruct the appliance outlet!

NEVER ATTEMPT TO REPAIR THE APPLIANCE YOURSELF – ALWAYS HAVE THIS DONE BY A QUALIFIED TECHNICIAN.
The indicated data and specifications are not binding; the manufacturer reserves the right to modify them at his own discretion notification or replacement. This product is in conformity with REACH regulations.

This product conforms to Directive WEEE 2012/19/EU.
The symbol of the crossed waste paper basket on the appliance and its packaging indicates that the product must be scrapped separately from other waste at the end of its service life. The user must therefore hand the equipment over to a sorted waste disposal facility for electro-technical and electronic equipment at the end of its service life.
Alternatively, he may return the equipment to the retailer at the time of purchase of a new equivalent type of appliance. Electronic equipment of size less than 25 cm can be handed over to any electronics equipment retailer whose sales area is at least 400 m2 for disposal free of charge and without any obligation to purchase new product.

Installation scheme