NUOS PRIMO - Water heater ARISTON - Free user manual and instructions

USER MANUAL NUOS PRIMO ARISTON

Dear Customer: We wish to thank you for having purchased the heat pump water heater. We hope that it meets your expectations and may offer you optimal service coupled with maximum energy saving for many years to come. Our group invests a lot of time, energy and economic resources in creating innovative solutions aimed at reducing the energy consumption of its products. Your choice shows sensibility and awareness towards reducing energy consumption, an issue directly related to environmental protection. Our constant commitment to creating innovative and efficient products coupled with your responsible behaviour in the rational use of energy both actively contribute to safeguarding the environment and natural resources. Store this manual with care; it is intended to provide information, warnings and suggestions on the correct use and maintenance of the appliance, so that you may fully appreciate all its qualities. Our technical assistance centre closest to you is at your complete disposal for answering any of your queries. INTRODUCTION This manual is intended for final users of the heat pump water heater and plumbers responsible for the latter installation. Failure to observe the indications contained in this manual shall void the warranty. This manual is an integral and essential part of the appliance. It must be stored with care by the user and should always be passed on to new owners or users of the appliance, and/or when the latter is transferred to another system. In order to ensure correct and safe use of the appliance, both installer and user, each for his/her respective requirements, must read the instructions and precautions contained in this manual carefully, as they provide important safety indications concerning installation, use and maintenance of the appliance. This manual is divided into four distinct sections:

SAFETY INFORMATION This section contains all the safety precautions to be observed according to International Standard IEC 60335-221.

GENERAL INFORMATION This section contains useful general information relating to the description of the appliance and its technical features, besides information on the symbols, units of measurement and technical terms used. This section includes the water heater’s technical data and dimensions.

This section is intended for installers. It contains all the indications and instructions that professionally qualified personnel must observe in order to ensure optimal installation of the appliance.

OPERATING AND MAINTENANCE INSTRUCTIONS FOR THE USER This section is intended for final users and contains all the information necessary for operating the appliance correctly and for assisting the user in carrying out regular checks and maintenance operations on the appliance. The manufacturer reserves the right to modify the data and contents of this manual without prior notice, with the aim of improving the quality of the relative products. To facilitate understanding of the contents herein, given that the manual is published in multiple languages and is valid for use in several countries, all the illustrations are grouped in the final pages and are common to the various languages.

SAFETY INFORMATION GENERAL INFORMATION GENERAL INFORMATION Description of the symbols used Field of application Instructions and technical norms Certifications – CE marking Packaging and supplied accessories Transport and handling Identification of the appliance TECHNICAL FEATURES Operating principle Construction features Overall dimensions Electrical diagram Technical data table

WARNINGS Installer qualification Implementing the instructions Safety regulations INSTALLATION Location of the appliance Positioning on the ground Air supply connections Hydraulic connections Electrical connections

WARNINGS Initial start-up Recommendations Safety regulations

INSTRUCTIONS FOR USE

Control panel description Turning the water heater on/off Setting the temperature Mode of operation Time setting Information menu Installer menu Anti-legionnaire’s disease protection Default settings Operation with two-tier electricity rate Anti-frost function Faults MAINTENANCE Draining the appliance Routine maintenance Troubleshooting Routine maintenance performed by users Water heater disposal ILLUSTRATIONS

Heat pump water heater – SAFETY INFORMATION SAFETY INFORMATION

• WARNING! This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the appliance in a safe way and understand the hazards involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be made by children without supervision.
• WARNING! Keep the packaging elements out of the reach of children, as they are potentially dangerous.
• WARNING! The installation and initial start-up of the appliance must be performed by qualified personnel in compliance with the national regulations in force regarding installation, and in conformity with any regulations issued by local authorities and public health bodies. At all events, disconnect all power supply circuits before intervening on the terminals.
• WARNING! Unqualified personnel must not remove covers nor perform maintenance operations and/or electrical connections.
• WARNING! If the appliance includes a power cord, contact an authorised technical assistance centre or qualified personnel whenever it needs to be replaced.
• WARNING! Incorrect installation can harm persons or animals and damage possessions; the manufacturer shall not be held liable for any damage in such cases.
• WARNING! It is mandatory to fit a safety valve onto the appliance’s water inlet pipe. The device must comply with the EN 1487:2002 standard and must have a maximum pressure of 0.7 Mpa (7 bar). Moreover, it must at least include the following components: 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.
• WARNING! The pressure safety device must be operated regularly to verify that it is not clogged and to remove any limescale deposits.

Heat pump water heater – SAFETY INFORMATION

• WARNING! It is normal for water to trickle from the pressure safety device during the heating phase; for this reason, it is necessary to connect the outlet, which must always be left exposed to the atmosphere, to a drainage pipe that slopes downwards and towards an area not subject to frost. It is advisable to also connect the condensate outlet to the same pipe, through the connection located on the back side of the water heater.
• WARNING! The appliance must be drained if left inactive in a room subject to frost. When necessary, empty the appliance as follows: - Permanently disconnect the appliance form the mains electricity; - Close the shut-off valve, if installed, or the central tap of the domestic water supply network; - Open the hot water tap (washbasin or bathtub); - Open the tap located on the safety valve.
• WARNING! Hot water at temperatures above 50°C running from taps may immediately cause serious burns. Children, the disabled and the elderly run a greater risk in this regard. Therefore, it is advisable to use a thermostatic mixing valve connected to the appliance’s water outlet pipe, which is identified by a red collar.
• WARNING! If the appliance includes rechargeable batteries, these must be removed before disposing of the appliance and placed in specific disposal containers. Before removing the batteries, the appliance must be disconnected from the power supply.

Heat pump water heater – GENERAL INFORMATION GENERAL INFORMATION

1.1 Description of the symbols used

In terms of installation and operation safety, the symbols described in the table below are used in order to stress the importance of the relative risk warnings: Symbol Description Failure to comply with this warning may result in injury to persons or, in some cases, death. Failure to comply with this warning may result in serious damage to property and plants or injury to animals. It is mandatory to comply with the general and appliance-specific safety measures.

1.2 Field of application

This appliance is intended for hot water production for domestic use or similar, at temperatures below boiling point. The appliance must be hydraulically connected to a domestic water supply line and to a power supply network. Exhaust ducts may be used for the entry and discharge of processed air. It is forbidden to use of the appliance for uses other than those specified. Any alternative use of the appliance constitutes improper use and is prohibited; in particular, the appliance may not be used in industrial cycles and/or installed in environments exposed to corrosive or explosive materials. The manufacturer shall not be held liable for any damage due to faulty installation, improper use or uses deriving from behaviour that is are not reasonably predictable, and incomplete or careless implementation of the instructions contained in this manual. This appliance should not be operated by individuals (including children) with reduced physical or sensory abilities, or by inexperienced or unskilled individuals, unless adequately supervised and trained regarding use of the appliance by persons responsible for their own safety. Children must be supervised by persons responsible for their safety so as to ensure that they do not use the appliance as a toy.

1.3 Instructions and technical norms

The purchaser pays for the appliance’s installation, which must be carried out by qualified personnel only, in conformity with national regulations in force and any provisions emitted by local authorities or bodies responsible for public health, and in accordance with the specific manufacturer indications contained in this manual. The manufacturer is responsible for the product’s conformity to the relevant construction directives, laws and regulations in force at the time the product is first commercialised. The designer, installer and user are each exclusively responsible, in their respective fields, for knowing and observing the legal requirements and technical regulations concerning the design, installation, operation and maintenance of the appliance. Any reference to laws, regulations or technical specifications contained in this manual is purely for information purposes; any new laws introduced or modifications to existing laws are not in any way binding on the manufacturer towards third parties. It is necessary to ensure that the power supply network to which the product is connected complies with the EN 50160 norm (under penalty of warranty invalidation). Relative to France, ensure that installation complies with the NFC 15100 norm. The tampering of product integral parts and/or supplied accessories invalidates the warranty.

Heat pump water heater – GENERAL INFORMATION

1.4 Certifications - CE marking

The CE marking applied to the appliance certifies that the latter conforms to the essential requirements of the following European Directives: - 2006/95/EC concerning the safety of electrical equipment. - 2004/108/EC concerning electromagnetic compatibility. The inspection is carried out according to the following technical standards: EN 255-3; EN 60335-1; EN/IEC 60335-2-21; EN 60335-2-40; EN 55014-1; EN 61000-3-2; EN 61000-3-3; EN 50366; EN 16147. CAHIER DE CHARGE_ 103-15/B__2011)Chauffe-eau Thermodynamiques POUR LA MARQUE NF elettricitè performance.

1.5 Packaging and supplied accessories

The appliance is anchored to a wooden pallet and is protected with polystyrene edge protectors, cardboard and a plastic transparent film on the outside; all the materials are recyclable and eco-compatible. The following accessories are included: - Belt for handling the water heater (to be removed once the product is installed). - Connection pipe for condensation water. - Instruction manual and warranty documents. - Two 3/4” dielectric coupling and joints

1.6 Transport and handling

Upon delivery of the product, check that the latter has not been damaged during transport and that no signs of damage appear on the packaging. In the event of damages, immediately notify any claims to the forwarder. WARNING! The appliance should be handled and stored in a vertical position. The product may be handled in a horizontal position only for short distances, while resting on the rear end indicated; in this case, wait at least 3 hours before starting the appliance once it has been correctly repositioned in a vertical position and/or installed; this is to ensure that the lubricating oil inside the refrigeration circuit is suitably distributed and to avoid damages to the compressor. The packaged appliance may be handled either manually or with the aid of a forklift truck, while ensuring that the above indications are observed. It is advisable to keep the appliance in its original packaging until installing it in its chosen location, particularly when construction work is under way on-site. Upon removing the packaging, check whether the appliance is intact and that no parts are missing. In the event of defects or missing components, notify the dealer within the time limits specified by the law. WARNING! Keep the packaging elements out of the reach of children, as they are potentially dangerous. When transporting or handling the appliance after the initial start-up, observe the aforementioned indication concerning the allowed tilt angle and ensure that all water has been drained from the tank. Should the original packaging be missing, provide an adequate protection for the appliance to prevent any damages, for which the manufacturer shall not be held liable.

Heat pump water heater – GENERAL INFORMATION Allowed positions Non-allowed positions

1.7 Identification of the appliance

The main information for identifying the appliance is contained on the adhesive data plate located on the water heater casing.

model tank capacity serial no. power supply voltage. frequency. maximum absorbed power max./min. pressure of the refrigeration circuit tank protection absorbed power – heating element mode marks and symbols thermal power yielded in heat pump mode max./min. power in heat pump mode type of refrigerant and charge maximum tank pressure

2. TECHNICAL FEATURES

2.1 Operating principle

The efficiency of a heat pump cycle is measured by the Coefficient of Performance (COP), i.e. the ratio between the energy supplied to the appliance (in this case, the heat transferred to the water to be heated) and the electrical energy used (by the compressor and the appliance's auxiliary devices). The COP varies according to the type of heat pump and to its relative conditions of operation. For example, a COP value equal to 3 indicates that for every 1 kWh of electrical energy used, the heat pump supplies 3 kWh of heat to the medium to be heated, of which 2 kWh are extracted from the free source.

Heat pump water heater – GENERAL INFORMATION

2.2 Construction features

fan 4 Ways defrost valve (only on EXT models) safety pressure switch hermetic rotary compressor electronic control panel feet with adjustable height electric heating element titanium impressed cu+rrent anode functional and safety NTC sensor condenser outlet water NTC temperature sensor disposable magnesium anode electrolytic condenser for compressor condensate drainage pipe thermostatic expansion valve evaporator

Inlet cold water ¾” pipe Outlet hot water ¾” pipe Condensate drainage connection Auxiliary circuit ¾” inlet pipe (SYS version only) Auxiliary circuit ¾” outlet pipe (SYS version only) Sheath for upper probe (S3) (SYS version only) Sheath for bottom probe (S3) (SYS version only) Recirculation ¾” pipe (SYS version only)

EDF Power supply (220-230V 50Hz) Batteries (3x1,2V AA rechargeable) Interface board Electric heating element (2000W) NTC sensor for heating element zone Impressed current anode Water tank earth connection Serial connection board Mainboard Operation condenser (15µF 450V) Compressor Fan 4-ways defrost valve Safety pressure switch NTC sensor for hot water pipe zone NTC sensor for evaporator and inlet air HCHP signal (EDP) - cable not supplied with the product

Heat pump water heater – GENERAL INFORMATION

2.5 Technical data table

Rated tank capacity Unit of measurement

Insulation thickness

Diameter of hydraulic connections G 3/4 M Diameter of condensate drainage connection

Diameter of air exhaust/intake pipes

150-200 Minimum water hardness Minimum conductivity of the water

Heating circuit exchange surface

0,65 Heat pump Average electrical power consumption

Max. electrical power consumption

2,8 Heating time (A) h:min 7:58 8:50 8:50 Heating energy consumption (A) Max. amount of hot water in a single intake V40 (A), Delivered at 55°C Qpr (over 24h) kWh 3,20 3,98 3,98

COP (B) Heating time (B) h:min 6:05 7:17 7:17 Heating energy consumption (B) Max. amount of hot water in a single intake V40 (B), Delivered at 55°C Qpr (over 24h) kWh 2,77 3,56 3,56

Tapping Max. water temperature with heat pump

0,9 Max. pressure of refrigerating circuit (low-pressure side) MPa

Max. pressure of refrigerating circuit (high-pressure side) MPa 2,4

Heat pump water heater – GENERAL INFORMATION Unit of measurement Description

240 SYS Heating element Heating element power

Max. water temperature with heating element

75 (65 factory default setting) Max. current consumption

Minimum volume of room of installation (D)

Minimum ceiling height of room of installation (D)

Max. temperature of room of installation

(A) (B) (C) (D) (E) (F) Values obtained with air temperature of 7°C, 85% relative humidity and input water temperature of 15°C exit 55°C (in conformity with EN255-3). Values obtained with air temperature of 20°C, 37% relative humidity and input water temperature of 15°C exit 55°C (in conformity with EN255-3). Values obtained with air temperature of 7°C, 87% relative humidity and input water temperature of 10°C and exit 55°C (in conformity with the NF Cahier de Charge standard 103-15/B_2011). In the event of installation without ducting. Outside of the heat pump’s interval of operation, heating of the water is ensured by the heating element. Tested in reverberant chamber according to regulation UNI EN ISO 3741 (exhaust air ducted with rigid pipe D200 length 2m, T air = 25±2°C, H.r. 55±5 %, T hot water = 45±2°C). Average value obtained on a significant number of products.

3.1 Installer qualification

WARNING! The installation and initial start-up of the appliance must be performed by qualified personnel in compliance with the national regulations in force regarding installation, and in conformity with any regulations issued by local authorities and public health bodies. The water heater is supplied with a sufficient amount of R134a refrigerant for its operation. This refrigerant fluid does not damage the atmosphere’s ozone layer, is not flammable and does not cause explosions; however any maintenance activities or work on the refrigerant circuit must exclusively be carried out by authorised personnel with the suitable equipment.

3.2 Implementing the instructions

WARNING! Incorrect installation can harm persons or animals and damage possessions; the manufacturer shall not be held liable for any damage in such cases. The installer is required to observe the instructions outlined in this manual. Once installation is complete, it is the installer’s duty to inform and instruct the user on how to operate the water heater and carry out the main operations correctly.

3.3 Safety regulations

Refer to Paragraph 1.1 under the section GENERAL INFORMATION for the description of the symbols used in the table below. Ref. Warning Type of risk

Electrocution caused by exposure to live Protect connection piping and cables so as to wires. avoid them being damaged. Flooding due to water leaking from damaged pipes. Electrocution from contact with live wires that have been incorrectly installed.

Make sure the installation site and any systems to which the appliance must be connected fully comply with the regulations in force. Use manual tools and equipment that are suitable for the intended use (in particular, ensure that the tool is not worn and that the handle is intact and securely fixed); use them correctly and prevent them falling from a height. Put them safely back in place after use. Personal injury caused by flying splinters or fragments, inhalation of dust, knocks, cuts, puncture wounds and abrasions. Use electrical equipment that is suitable for the intended use; use the equipment correctly, keep passages clear of the power supply cable, prevent the equipment falling from a height, disconnect and put back in place after use. Personal injury caused by flying splinters or fragments, inhalation of dust, knocks, cuts, puncture wounds and abrasions.

Damage to the appliance caused by improper operating conditions. Damage to the appliance or surrounding objects caused by falling splinters, knocks and incisions. Damage to the appliance or surrounding objects caused by falling splinters, knocks and incisions.

Descale the components, in accordance with the instructions of the safety data sheet included with the product used, while ventilating the room and wearing protective clothing; avoid mixing different products and protect the appliance and surrounding objects. Personal injury caused by acidic substances coming into contact with skin or eyes; inhaling or swallowing harmful chemical agents. Damage to the appliance or surrounding objects due to corrosion caused by acidic substances.

Make sure that any portable ladders are securely positioned, that they are sufficiently Personal injury caused by falling from a resistant, that the steps are intact and not height or cuts (stepladders shutting slippery, that these do not move around when accidentally). someone climbs on them and that someone supervises at all times.

Make sure that the work area has adequate hygiene and health conditions in terms of Personal injury caused by knocks, lighting, ventilation and the solidity of stumbling etc. relevant structures.

Personal injury caused by electrocution, Wear individual protective clothing and falling splinters or fragments, inhalation of equipment during all work phases. dust, shocks, cuts, puncture wounds, abrasions, noise and vibration.

All operations inside the appliance must be performed with the necessary caution in Personal injury caused by cuts, puncture order to avoid sudden contact with sharp wounds and abrasions. parts.

Before handling, empty all components which may contain hot water and perform bleeding Personal injury caused by burns. where necessary.

Make all electrical connections suitably-sized conductors.

Protect the appliance and all areas in the Damage to the appliance or surrounding vicinity of the work area using suitable objects caused by falling splinters, material. knocks and incisions.

Handle the appliance with care, while using Damage to the appliance or surrounding suitable protection equipment. Use the objects caused by shocks, knocks, appropriate handling belt. incisions and crushing.

Arrange materials and equipment in such a Damage to the appliance or surrounding way as to make handling easy and safe, and objects caused by shocks, knocks, avoid the formation of any piles which could incisions and crushing. give way or collapse.

Reset all safety and control functions affected by any work performed on the appliance and Damage or shutdown of the appliance make sure that they operate correctly before caused by out-of-control operation. restarting the appliance. using Fire caused by overheating due to electrical current passing through undersized cables.

WARNING! Observe the general warnings and safety instructions listed in the previous paragraphs and strictly adhere to the indications therein contained.

4.1 Location of the appliance

WARNING! Prior to starting any installation activities, ensure that the location where the water heater is to be installed satisfies the following requirements:

In the event of water heaters without an air exhaust duct, the room of installation should have a volume of no less than 20 m3 and must be adequately ventilated. Avoid installing the appliance in rooms which may favour frost build-up. Do not install the product in a room containing an appliance that requires air to function (e.g. an openchamber gas boiler, open-chamber gas water heater, etc.). The product’s safety and performance levels are not guaranteed in the event of outdoor installation. The appliance’s air exhaust and/or extraction duct (if present) must have access to the outside from the point where the appliance is installed. The connections for the air exhaust and aspiration ducts are located on the upper part of the appliance. Ensure that the installation site and the electrical and hydraulic systems to which the appliance must be connected fully comply with the regulations in force. The chosen site must have, or must be suitable to house, a single-phase 220-230 V ~ 50 Hz power supply socket. The chosen site must be suitable to house a condensate drainage outlet connected to the back of the appliance with a suitable siphon. The chosen site must ensure that the appropriate safety distances from the wall and ceiling can be observed, for the appliance to operate properly and to facilitate maintenance operations. The support surface must ensure a perfectly horizontal operating position (Refer to fig. 2). The chosen site must conform to the appliance’s IP protection rating (protection against the penetration of liquids) as specified by the regulations in force. The appliance must not be exposed to direct sunlight, even when windows are present. The appliance must not be exposed to particularly aggressive substances such as acidic vapours, dust or gasfilled environments. The appliance must not be directly installed on telephone lines that are unprotected against overvoltage. The appliance must be installed as close as possible to the points of use to limit heat dispersion along the piping. The air aspirated by the product must be free of dust, acicid vapours and solvents. In the event of non-ducted installation, observe the distances from the walls as indicated in Fig. 4.

4.2 Positioning on the ground

Refer to Fig. 5 Once the suitable installation position has been located, remove the packaging and remove the fixings visible on the pallet where the product is based. Using the appropriate belt, remove the product from the pallet. Fix the feet on the ground (through the appropriate holes) using suitable screws and rawlplugs; after positioning the appliance, remove the fabric belt by loosening the relative bolts.

Heat pump water heater - TECHNICAL INFORMATION FOR INSTALLERS

4.3 Air supply connections

Please bear in mind that using air from heated environments may hamper the building’s thermal performance. There is one connection for the air intake and one for the air exhaust on the rear side of the appliance. It is important to not remove or tamper the two grilles. The outlet air may reach temperatures that are 5-10°C lower compared to that of the inlet air and, if not ducted, the temperature of the room of installation may drop sensibly. If the water heater is intended to function by externally (or through another room) expelling or intaking the air processed by the heat pump, pipes specifically designed for the passage of air may be used. Make sure that the pipes are securely connected and fixed to the product so as to avoid any accidental detachments (for example, use suitable silicone). Do not in any way manipulate or break the air intake/exhaust grilles. Even if the product is not ducted it is advisable to install a curve in the suction line to prevent by-pass between the air inlet and outlet (fig. 4). In the case of product ducted with rigid tubes adopt during installation all the precautions necessary to ensure the maintenance operations (fig.4)

WARNING: Do not use outdoor grills resulting in high losses, such as anti-insect grilles. The grids used should

allow good air flow, the distance between the inlet and outlet air should not be less than 50cm. Protect pipes from the external wind. The expulsion of air in the chimney is allowed only if the draft is appropriate, is also required periodic maintenance of the barrel, and chimney accessories. The total static pressure loss due to installation is calculated by adding the loss of the single installed components; this sum must be lower than the static pressure of the fan which is equal to (55 Pa). See diagram on the last page. WARNING! A type of canalization not suitable affects product performance and significantly increases the heating time! EXAMPLES Figure 6 Figure 7 Figure 8 Figure 9 Inlet air: Not ducted / Outlet air: externally ducted Inlet air: internally ducted / Outlet air: externally ducted Inlet air: externally ducted / Outlet air: externally ducted Installation without ducting

4.4 Hydraulic connections

Connect the water heater inlet and outlet to pipes or pipe fittings that can withstand the operating pressure and temperature of the hot water, which may reach 75°C. It is not advisable to use materials that cannot withstand such temperatures. The dielectric union fitting (with joint supplied with the product) must be applied to the hot water outlet pipe, prior to performing the connection. Screw a “T” fitting identified by a blue collar onto the appliance’s water inlet pipe. See Figure 10. It is mandatory to fit a safety valve onto the appliance’s water inlet pipe. The device must comply with the EN 1487:2002 standard and must have a maximum pressure of 0.7 Mpa (7 bar). Moreover, it must at least include the following components: a cutoff valve, a non-return valve, a control mechanism for the non-return valve, a safety valve and a water pressure shut-off device.

Heat pump water heater - TECHNICAL INFORMATION FOR INSTALLERS The device’s relief outlet must be connected to a relief pipe with a diameter no less than that of the appliance’s connection (3/4”), with the aid of a siphon creating an air gap of at least 20 mm to allow for visual inspection; this is to prevent any harm to persons and animals or damage to objects should the device activate and for which the manufacturer shall not be held liable. Use a flexible pipe to connect the pressure safety device inlet to the cold water system pipe, using a cut-off valve if necessary. Additionally, a water discharge pipe must be fitted to the outlet in case the drainage tap is opened. Avoid overtightening the pressure safety device and do not tamper with it. It is normal for water to trickle from the pressure safety device during the heating phase; for this reason, it is necessary to connect the outlet, which must always be left exposed to the atmosphere, to a drainage pipe that slopes downwards and towards an area not subject to frost. It is advisable to also connect the condensate outlet to the same pipe, through the connection located on the back side of the water heater. The appliance must not operate with water hardness levels below 12°F; on the other hand (>25°F), it is advisable to use a suitably calibrated and monitored water softener in the event of particularly hard water; in this event, the residual hardness must not fall below 15°F. If the mains pressure is close to the calibrated valve values, a pressure reducer must be installed as far as possible from the appliance. The SYS version is provided with a connection G3/4” for recirculation circuit (if present in hydraulic circuit). WARNING! It is advisable to carefully wash the system’s pipes in order to remove any residues of screw thread, welding or dirt which may hamper the correct operation of the appliance.

4.5 Electrical connections

Cable Permanent power supply (cable supplied with the appliance)

EDF signal (cable not supplied with the appliance) 1.5mm2 H05V2V2-F 2G 0.75mm2 Protection 16A

The batteries ensure that the product is protected against corrosion, when the appliance is not powered.

Is forbidden remove covers and do maintenance and / or electrical connections by unqualified personnel The appliance is supplied with a power supply cable (should the latter need to be replaced, use only original spare parts supplied by the manufacturer). It is advisable to carry out a check on the electrical system to verify conformity to the regulations in force. Verify that the electrical system can suitably withstand the water heater’s maximum power consumption values (refer to the data plate), in terms of the size of the cables and their conformity to the regulations in force. It is forbidden to use multiple outlet sockets, extension cables or adaptors. It is forbidden to use piping from the water, heating and gas systems for earthing the appliance. Prior to operating the machine, make sure that the electricity mains voltage conforms to the value indicated on the appliance’s data plate. The manufacturer of the appliance shall not be held liable for any damage caused by failure to earth the system or due to anomalies in the electric power supply. To disconnect the appliance from the mains, use a bipolar switch complying with all applicable CEI-EN regulations in force (minimum distance between contacts 3 mm, switch preferably equipped with fuses). The appliance must comply with the European and national standards, and must be protected by a 30mA RCD.

Use this configuration whenever users do not have a two-tier electricity rate. The water heater will always be connected to the power supply network to ensure 24h operation. Remove the 3 NI-MH batteries if you do not use the two-rate time-of-day tariff with HC/HP signal (see Fig. 14).

ELECTRICAL CONNECTION WITH TWO-TIER ELECTRICITY RATE

If users have a two-tier electricity rate and a suitable meter, the product may be powered only while the lowest rate applies. During the period in which the appliance is not powered, protection against corrosion through the impressed current anode is ensured by the rechargeable batteries. To put them into service, open the battery cover (see Fig. 14) and remove the battery protection tab ELECTRIC CONNECTION WITH TWO-TIER RATE AND HC-HP SIGNAL Offers the same cost advantages compared to the two-tier rate configuration but, additionally, it allows for obtaining rapid heating thanks to the BOOST mode that activates heating even with the HP rate.

1) Connect a bipolar cable to the appropriate signal contacts on the meter.

2) Connect the signal bipolar cable to the terminal “EDF” which is located inside the electric box at

right side of the product.

WARNING: the signal cable must be inserted in the hole beneath the power supply cable then

anchored with suitable cable clips located inside the product and tightened in the cable glands near the appropriate terminal; make a suitably-sized hole in the rubber rings for the passage of the cable. Fig. 15

3) Activate the HC-HP function through the installer menu (see Paragraph 7.7).

In case of connection of boiler/heater to 240SYS heating pump version is recommended to use upper shealt (S3) In case of connection of solar panel to 240SYS heating pump version is recommended to use both upper and bottom shealt (S3) and (S2)

Once the appliance is connected to the hydraulic and electric systems, the water heater must be filled with water from the domestic water supply network. In order to fill the water heater, it is necessary to open the central tap of the domestic network supply and the nearest hot water tap, while making sure that all the air in the tank is gradually expelled. Remove the tab (C) from the batteries, the battery housing is located beneath the cover (B) on the lower side of the product – refer to the picture 14.

6.1 Initial start-up

WARNING! The installation and initial start-up of the appliance must be performed by qualified personnel in compliance with the national regulations in force regarding installation, and in conformity with any regulations issued by local authorities and public health bodies. In all cases, the company performing the work must carry out checks to verify the safety and correct operation of the entire system. Before starting up the water heater, verify whether the installer has completed all the relative installation operations. Make sure to have clearly understood the installer's indications on how to operate the water heater and perform the main operations on the appliance. The heat pump requires 5 minutes to become fully operational when starting it for the first time.

In the event of a malfunction and/or faulty operation, turn the appliance off and do not attempt any repairs, but contact qualified personnel. Only original spare parts must be used and any repairs must be carried out exclusively by qualified personnel. Failure to comply with the above-mentioned recommendations may jeopardise the appliance’s safety and void the manufacturer’s liability. In the event of prolonged inactivity of the water heater, it is advisable to carry out the following: - Disconnect the appliance from the power supply or, if a switch is mounted upstream from the appliance, turn the switch itself to the “OFF” position. - Close all taps of the domestic water supply system. WARNING! Hot water at temperatures above 50°C running from taps may immediately cause serious burns. Children, the disabled and the elderly run a greater risk in this regard. Therefore, it is advisable to use a thermostatic mixing valve connected to the appliance’s water outlet pipe, which is identified by a red collar. The mixing valve is compulsory on SYS models. WARNING! (SYS version only) Make sure the temperature detected by the control unit probes S2 and S3 does not exceed 75°C Fig. 15.

Heat pump water heater - OPERATING AND MAINTENANCE INSTRUCTIONS FOR THE USER

6.3 Safety regulations

Refer to paragraph 1.1 for the description of the symbols used in the table below. Ref. Warning

Type of risk Electrocution due to exposure to live components. Do not perform operations that involve removing the appliance from its housing. Flooding caused by water leaking from disconnected piping. Personal injury caused by the object falling off the appliance as a result of vibrations.

Do not leave objects lying on the Damage to the appliance or any underlying items appliance. caused by the object falling off as a result of vibrations. Personal injury caused by the appliance falling down.

Do not climb onto the appliance.

Electrocution due to exposure to live components. Do not perform any operations that involve Personal injury caused by burns due to overheated opening the appliance. components, or wounds caused by sharp edges or protrusions.

Do not damage the power supply cable.

Do not climb onto chairs, stools, ladders or Personal injury caused by falling from a height or cuts unstable supports to clean the appliance. (stepladders shutting accidentally).

Do not attempt to clean the appliance without first switching it off, removing the Electrocution due to exposure to live components. plug or turning the external switch to the OFF position.

Do not use the appliance for any purpose Damage to the appliance caused by operation other than normal household operation. overload. Damage to objects caused by improper use.

Do not allow children or inexperienced Damage to the appliance caused by improper use. persons to operate the appliance.

Do not use insecticides, solvents or aggressive detergents to clean the Damage to plastic or painted parts. appliance.

Avoid placing any objects and/or appliance Damage due to possible water leakage. beneath the water heater

Do not drink the water of condensation Damage to the appliance or any underlying objects caused by the appliance detaching from its fixing brackets and falling. Electrocution from non-insulated live wires. Injury from positioning

The control panel, constructed in a simple and rational way, comprises two buttons and a central knob. In the upper section, a DISPLAY shows the set temperature or the detected temperature, besides other specific indications such as the operation mode signal, fault codes, settings and information of the product’s condition.

7.2 Turning the water heater on/off

Turning the appliance on: simply press the ON/OFF button to turn the water heater on. Now you can set the current time (see section 7.5) The DISPLAY visualises the “set” temperature and operation mode, while the HP symbol and/or heating element symbol indicate the operation of the heat pump and/or heating element respectively. Turning the appliance off: simply press the ON/OFF button to turn the water heater off, only “OFF” appears on the display. The protection against corrosion is still ensured, while the product will automatically ensure that the temperature of the water in the tank does not fall below 5°C.

7.3 Setting the temperature

The desired temperature for the hot water can be set by turning the knob clockwise or anti-clockwise (the visualised temperature will flash temporarily). To visualise the current temperature of the water in the tank, press and release the knob; the relative value will appear for 8 seconds then the set temperature will reappear once again. The temperatures that can be obtained in the heat pump mode vary between 50°C and 55°C, by factory default setting, and 40°C-55°C, by varying the setting on the installer menu. The maximum temperature that can be obtained with the heating element is 65°C, by factory default setting, and 75°C, by varying the setting on the installer menu.

Heat pump water heater - OPERATING AND MAINTENANCE INSTRUCTIONS FOR THE USER

7.4 Mode of operation

In normal operating conditions, the “mode” button can be used to vary the operating mode through which the water heater reaches the set temperature. The selected mode will be visualised on the line below the temperature. If the heat pump is active, the following symbol will appear: If the heating element is active, the following symbol will appear:

AUTO mode: the water heater understands how to reach the desired temperature in a few hours, through the rational use of the heat pump and, only if necessary, of the heating element. The maximum number of hours it takes depends on the P9 – TIME_W parameter (see Paragraph 7.7), which is set to 8 hours by default. (recommended for winter).

BOOST mode: by activating this mode, the water heater simultaneously uses the heat pump and heating element to reach the desired temperature in the shortest possible time. Once this temperature is reached, the AUTO operating mode is restored.

GREEN mode: the water heater will use the heat pump, thereby ensuring maximum energy saving! The maximum temperature that can be reached is 55°C. The heating element may also turn in case of errors or anti-legionnaire’s disease. This function is recommended for air temperatures above 0°C during the hours of heating.

PROGRAM mode: You have two programs P1 and P2, which may act either individually or in combination with each other during the day (P1 + P2). The device will be able to activate the heating phase to reach the selected temperature set in the timetable, giving priority to heating by heat pump and, if necessary, through the heating element. Press the mode button to select the desired Program mode (P1/P2/P1+P2), turn the knob to set the desired temperature, press it again to confirm, turn the knob to set the desired time and press to confirm; mode P1 + P2 can set the information for both programs. In the case of electrical connection with two-tier price signal HC / HP, you still possible program the water heater at any time of day. For this function is required the setting of the current time, see the next paragraph. Note: To ensure comfort, in the case of P1 + P2 mode operation with very close times between them, it is possible that the temperature of water is higher than the temperature set.

The time setting is required: At initial start-up; Occur simultaneously absence of power from the mains and battery (the product will restart in Auto mode). You can also change the current time through the parameter P1 (paragraph 7.7). The display flashes up showing hours and minutes. Turn the knob until you find the current time and confirm by pressing the knob. Repeat the procedure to set the minutes.

Name T W1 T W2 TW3 T AIR T EVAP HP h HE h SW MB SW HMI Parameter description Temperature recorded by the heating element unit sensor 1. Temperature recorded by the heating element unit sensor 2. Temperature recorded by the hot water pipe sensor. Temperature recorded by the inlet air sensor. Temperature recorded by the evaporator sensor. Meter for internal parameter 1. Meter for internal parameter 2. Mainboard software version. Interface board software version.

DEFROS Parameter Parameter description Time setting Adjustment of the maximum obtainable temperature (from 65°C to 75°C). A higher temperature value allows for using a greater amount of hot water. Activation/deactivation of the Anti-Legionnaire’s Disease function (on/off). See Paragraph Maximum number of hours of daily heating (from 5h to 24h). Activation/deactivation of the two-tier rate operation mode. See Paragraph 7.10 Resetting of all factory default settings. Adjustment of the minimum obtainable temperature (from 50°C to 40°C). A lower temperature setting allows for more energy-efficient operation in the event of limited hot water consumption. Activation/deactivation of the defrost mode (on/off). If activated, this mode allows the heat pump to function at air temperatures as low as 5°C.

If activated, the water heater automatically carries out the anti-legionnaire’s disease protection function. The water is brought to a temperature of 65°C on a monthly basis and for a maximum time of 15 minutes, so as to avoid germs from developing in the water tank and piping (provided the water has not been brought to T>57°C at least once for at least 15 minutes). The first heating cycle is performed 3 days after the function has been activated. As these temperatures may cause burns, it is advisable to use a thermostatic mixer. During the cycle of antilegionella will be displayed “ANTI_B” alternately to the mode of operation, once the cycle is done the set temperature remains the original one. In the event that is enabled the two-tier rate signal HC-HP, the function will take place during the economic tariff. To stop press "on/off".

7.9 Default settings

The appliance is manufactured with a series of default modes, functions or values, as indicated in the table below:

TIME_W (no. of accepted hours of powering) HC-HP (two-tier rate operation mode)

7.10 Operation with two-tier electricity rate

To be able to operate also on appliances with a two-tier rate system, the control logic calculates the number of average hours a day during which the power supply is available in the economy mode (HC). A self-learning function ensures that the appliance reaches the pre-set temperature in the time range during which the economy rate applies; the maximum limit of hours is determined by the P9 TIME_W parameter; after the initial start-up (or after switching off the hardware), the default setting is 8 hours.

7.11 Anti-frost function

In any event, if the temperature of the water in the tank falls below 5°C while the appliance is powered, the heating element (2000 W) will be automatically activated to heat the water up to 16°C.

As soon as a fault occurs, the appliance enters into the fault mode while the display emits flashing signals and visualises the error code. The water heater will continue supplying hot water provided the fault affects only one of two the heating units, by activating the heat pump or heating element. If the fault involves the heat pump, the symbol "HP" will flash on the screen, while the heating element symbol will flash if the fault involves this component. If both components are affected, both symbols will flash. Error code Cause Heating element operation Heat pump operation What to do

Heating occurs without any water in the water tank OFF OFF Verify the causes of the lack of water (leakage, faulty hydraulic connections, etc.).

Excessive temperature of the water in the tank OFF OFF Turn the appliance off then on again; if the problem persists, contact the technical assistance service.

OFF Try restarting the machine; if the error persists, contact the technical assistance service.

Excessive difference between the temperatures of the heating element zone sensors Excessive pressure in the refrigeration circuit, or faulty reading on the pressure switch

Evaporator obstructed

Turn off the appliance. Check that the fan is not broken and that the evaporator is not obstructed. Check whether the 4 ways valve functions properly and replace it if necessary. Check the evaporator sensor. Turn off the appliance. Verify whether the compressor functions properly and/or check for any refrigerant gas leakages. Verify whether the evaporator sensor is properly connected and positioned, and replace it if necessary. Check the perfect cleaning of grids and ducts Turn off the appliance. Verify that there are no physical impediments to the movement of fan blades, check the wiring of connection with circuit boards. Check the evaporator sensor. Verify whether the sensor is properly connected and positioned, and replace it if necessary

OFF Verify whether the sensor is properly connected and positioned, and replace it if necessary

Hot water pipe sensor fault

OFF Verify whether the sensor is properly connected and positioned, and replace it if necessary

OFF (if T air <5°C) Check that the fan is not broken and that the evaporator is not obstructed. Check whether the 4way valve functions properly and replace it if necessary. Check the perfect cleaning of grids and ducts

PCB fault Excessive number of ON/OFF (RESET) Lack of communication between the PCB and interface Empty tank (EMPTY), impressed current anode circuit open Short-circuit on the impressed current anode circuit OFF OFF OFF OFF OFF OFF OFF OFF

Try turning the appliance off then on again and verify the operation of the control boards, if necessary Temporarily disconnect the product and the batteries Try turning the appliance off then on again and verify the operation of the control boards or replace them, if necessary Verify whether there is any water in the tank, check or replace the impressed current anode, if necessary Check or replace the impressed current anode if necessary

8. MAINTENANCE (for authorized personnel)

WARNING! Observe the general warnings and safety instructions listed in the previous paragraphs and strictly adhere to the indications therein contained. All maintenance operations and interventions should be performed by qualified personnel (i.e. with the necessary requirements as outlined in the applicable norms in force). During maintenance it is advisable to wash the tank in order to remove any remaining impurities.

8.1 Draining the appliance

The appliance must be drained if left inactive in a room subject to frost. When necessary, empty the appliance as follows: Permanently disconnect the appliance form the mains electricity. Close the shut-off valve, if installed, or the central tap of the domestic water supply network. Open the hot water tap (washbasin or bathtub). Open the tap located on the safety valve.

8.2 Routine maintenance

It is advisable to clean the evaporator on an annual basis in order to remove any dust or obstructions. To access the evaporator, placed on the external unit, it is necessary to remove the fixing screws of the frontal and top cover. Verify that the external terminal of the air exhaust duct, and the duct itself, are not obstructed or have not deteriorated. Clean the evaporator with a flexible brush taking care not damage it. In the case you found some bended fins, straighten them with a special comb, according to the fins spacing (1.6mm). ). Carry out the same check for the intake duct, if present. Ensure that the condensate water runs out in a suitable drain and make sure the discharge is made without hindrance. Check and clean canalizations and grills. Use only original spare parts. After each removal is advisable to replace the gasket flange.

Problem Possible reason Low temperature set Malfunctioning of the timer for two-tier rate (if the product is installed in this configuration) Insufficient air flow to the evaporator. What to do Increase the temperature set for the outlet water. Check for errors on the display and act in the way specified on the chart "Faults". Check the voltage at the supply terminals, verify the integrity and connections of the cables. Try to put the product in “Boost” mode, if is ok in this way, check the connection of the meter, check the integrity of the HC/HP cable. Check the operation of the contactor day / night and that the set time is enough to heat water. Clean the grilles and ducts regularly. Product off Check availability of electricity, turn on the product. Device functioning errors No electrical connection, disconnected or damaged wirings Water comes out cold or insufficiently warm Absence of HC/HP signal (if the product is installed with the HC/HP signal cable) Usage of a large amount of hot water when the product is heating up phase. Probe error The water is boiling (with the possible presence of steam from the taps) Reduced functioning of the heat pump, semipermanent operation of the electrical resistance Insufficient flow of hot water Overflowing water by the the safety valve Increase of the noise Problems of visualization or display off Control the presence, even if occasional E5. High level of scaling of the boiler and components Probe error Turn off the power, drain the unit, remove the sheath of the resistance and remove lime scale inside the boiler, be careful not to damage the enamel of the boiler and the sheath resistance. Repackage the product as in the original configuration, it is recommended to replace the flange gasket. Control the presence, even if occasional E5. Air temperature out of range Depending from the climatic conditions. “Time W” value too low Set a parameter for lower temperature or a longer unit of “Time W". Installation done not in accordance with electric voltage (too low) Evaporator clogged or frozen Problems with the heat pump circuit Provide a proper Electric voltage. Check the cleaning of the evaporator. Make sure that there are no errors on the display. Are not yet past 8 days by: -First Time instalation. -Change of the parameter Time-W. -No power from mains in absence of batteries or exhausted batteries. Verify that there are no leaks along the circuit, check Leaks or obstructions by the water circuit the integrity of the the deflector pipe, the integrity of incoming cold water pipe and hot water pipe. If you want to avoid the drip, install an expansion vessel on the plant supply. If leakage continues during the period of no heating, check A drip of water by the device should be the calibration of the device and the pressure of the water considered normal during the heating network. Caution: Do not obstruct the hole for evacuation of the device! Damage or disconnection of the wiring connecting electronic board and interface board Check the components in movement, clean the fan and the other parts who can generate noise or vibrations. Check the components fixed with screws, be sure that the screws are tight. Check the integrity of the connection, check the operation of electronic boards. No power from mains in absence of batteries or exhausted batteries. Check if there is electric mains supply and check the conditions of the batteries. Presence of obstructive elements inside Components vibration

Heat pump water heater - OPERATING AND MAINTENANCE INSTRUCTIONS FOR THE USER Bad odor coming from the the product Abnormal or excessive consumption than expected Absence of a siphon or siphon empty Provide a siphon, with the proper quantity of water. Loss or partial obstructions of the refrigerant circuit Start your product in heat pump mode, use a leak detector for R134a to verify that there are no leaks. Bad environmental conditions or improper installation Partially clogged evaporator Check the cleanliness of the evaporator grid and ducts. Incorrect installation Other Contact the technical support.

8.4 Routine maintenance performed by users

It is advisable to rinse out the appliance after each routine or extraordinary maintenance intervention. The pressure safety device must be operated regularly to verify that it is not clogged and to remove any limescale deposits. Check that the condensate drainage pipe is not obstructed. Check the perfect cleaning of grids and ducts. Check that the condensate drainage pipe is not obstructed. The batteries must be replaced every 2 years or in case of losses. Make sure that they are correctly disposed of and exclusively replace them with 3 AA-type rechargeable batteries (minimum 2100 mAh); observe the polarities as illustrated in the battery housing. See fig. 14. The appliance should be unplugged when you remove the batteries.

8.5 Water heater disposal

The appliance contains R134a-type refrigerant gas which must not be released into the atmosphere. In case of permanent decommissioning of the water heater, ensure that disposal procedures are carried out by qualified personnel only. This product conforms to EU Directive 2002/96/EC. The barred dustbin symbol appearing on the appliance’s data plate indicates that the product must be disposed of separately from household waste once it reaches the end of its lifespan, and transferred to a waste disposal site for electric and electronic equipment, or returned to the dealer when purchasing a new appliance of the same kind. The user is responsible for delivering the decommissioned appliance to a suitable waste disposal site. Proper separated collection of the decommissioned appliance and its successive eco-compatible recycling, treatment and disposal contributes to preventing negative effects on the environment and health and favours the reuse of the materials comprising the product. For further details on the available waste collection systems, contact your local waste disposal office, or the dealer from which the product was purchased. This appliance includes rechargeable batteries: these must be removed before disposing of the appliance and placed in specific disposal containers. The battery housing is located beneath the cover on the lower side of the product.