FREE COOLING allows to automatically draw fresh air from outside and supply it in the rooms, at no cost, just by operating the fans.

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1 TECHNICAL BULLETIN Make up and purification unit with active thermodynamic recovery for indoor installation Series: CPAN-U with R134a and CPAN-U with R410A SUMMER AND WINTER ACTIVE THERMODYNAMIC RECOVERY thanks to heat pump technology, all year-round the active thermodynamic recovery multiplies the energy contained in the exhaust air and gets rid of high pressure drops common of traditional systems. ELFOFresh² FULFILLS UP TO 80% OF THE BUILDING THERMAL REQUIREMENT the produced heating or cooling capacity reduces the capacity requested to the integrated air conditioning system, increasing the seasonal efficiency. ELECTRONIC FILTERING: PM10, BACTERIA, POLLEN the electrostatic filter at high efficiency is able to get rid of fumes, fine dust, viruses and bacteria. Its characteristics allow to reduce the ventilation electric consumptions. SUMMER DEHUMIDIFICATION IDEAL FOR THE COUPLING WITH THE RADIANT COOLING is the ideal solution to complete radiant systems, thanks to its outstanding ability to control ambient humidity. FREE COOLING allows to automatically draw fresh air from outside and supply it in the rooms, at no cost, just by operating the fans with air flow from 70 to 120 m 3 /h with air flow from 200 to 650 m 3 /h

2 ELFOSystem GAIA Edition ELFOFresh is the device for the air renewal of ElfoSystem that Clivet has thought for residential installations and offices Radiant panels Connection to solar A system that looks toward the future It does not use fossil fuels. It uses renewable energy from 75 up to 100%. Substantially contributes toward reaching the European targets of by 2020 (reduction of CO 2 emissions, primary energy and use of renewable energy). Qualifying proposal Specialized solution with high value added. Single annual cycle system for total comfort. Increases the building's energy efficiency by at least 2 Classes. 2

3 ELFOSystem GAIA Edition A single smart system with all the elements that generate year-round comfort: Heating Cooling Domestic hot water Fresh air renewal and purification Humidity control ELFOControl2 centralised control device GAIA Production of heat, cool capacity and DHW ELFOFresh2 Device for the fresh air renewal and purification Radiant panels ELFORoom2 Ambient thermostat room by room Radiators Connection to the solar panels Simple to install Economically convenient Industrialized solution that permits a quick and high Thanks to its high energy efficiency, it increases the value of the property, with an average return on quality installation. investment in 3-4 years. Excludes installation and adjustment error. 60% reduction of the space in the heating room. Wirings and connections are clear and preconfigured. Complies with the minimum requirements for existing financial incentives. 3

4 ELFOSystem GAIA Edition is based on the following elements: Production GAIA High efficiency heat pump for the heat/cool and domestic hot water production Packaged unit for the comfort by using renewable energy Integrated system for the recovery of the solar Energy from thermal correctors Integrated production of domestic hot water System with the best seasonal efficiency on the market Water production up to 60 C, operating with fresh air temperature down to 22 C Air and water version ELFOControl 2 Included with GAIA Preassembled unit ENERGY EXCHANGER Draws the energy contained in the air GAIA Aria GAIA Contains all system elements In comparison to a traditional combustion system, Gaia Aria offers three essential advantages: It does not require a gas feed, flues and explosion security systems Encloses all of the system elements In a single unit it includes heating, cooling and solar thermal store TRADITIONAL SYSTEM The installation time is DRASTICALLY REDUCED to the best advantage of a QUALITY AND SAFETY result. 4

5 ELFOSystem GAIA Edition is based on the following elements: ELFOControl² Control Advanced control system to govern operation of the entire system Full management of the system Intelligent consumption Customised comfort levels A wealth of functions that are easy to manage Android platform It optimises heating and cooling with GAIA It uses the contribution of thermal solar sources to produce DHW It guarantees the availability of domestic hot water It freshes and purifies air with ELFOFresh² It communicates with the thermostats of the various rooms to control temperature and humidity levels It manages the radiant panels It manages the room terminals It manages radiators and heating furniture Complete control over comfort ELFOControl² is the brain behind your system that communicates with all the components installed. It checks the operating conditions of each individual device and allows to adjust the operation of the entire system from a single control centre, on which the setting of all desired parameters to ensure top comfort levels depends. ELFOControl² adjusts the temperature of each room, controls the humidity levels, ensures the quality of the air and the production of domestic hot water. It checks every aspect of the system in order to ensure the perfect comfort for any kind of need. 5

6 ELFOSystem GAIA Edition is based on the following elements: Fresh Air ELFOFresh² Room ventilation and purification system with energy recovery Fresh air intake Summer and winter active thermodynamic recovery With the heat pump technology, it multiplies the energy contained in the air ejected all year round and eliminates the considerable pressure drops of traditional systems. Air exhaust Fulfill up to 80% of the building thermal load It reduces the power required from the additional air-conditioning system and increases its seasonal efficiency. Electronic filtering Effective protection also against the most hazardous polluting agents (PM10, bacteria, pollen). Summer dehumidification Ideal in combination with Radiant cooling. Clean air inlet in the room FREE-COOLING It allows to draw fresh air from outside and introduce it into the rooms, at no additional cost, just by operating the fans. Stale air drawn from the rooms Air Distribution ELFOFresh Air The exclusive air distribution system Versatile installation thanks to the use of walkable flexible ducts Easy the components are easy to select and install Quality of the air guaranteed by antistatic and antibacterial ducts Guaranteed result 6

7 ELFOSystem GAIA Edition is based on the following elements: ELFORoom² Distribution Cased or uncased water terminal unit for vertical and horizontal installation Homogenous temperatures at all times Eliminates the stratifications of the air temperature thanks to the continuous modulation of the fan speed Reduced consumptions The exclusive motor enables strong reductions in consumption 100% silent operation The continuous operation of the fan allows the appliance to always operate at very low speeds, which means the noise it produces is basically imperceptible. Purifies the air while conditioning The continuous fan operating allows the unit to operate always privileging automatically the lower fan speeds in favour of the silence. Satisfies all installations Available in the cased and uncased, both vertical and horizontal version. Heat distribution ELFODistribution Heat-diffusion systems with room-by-room temperature regulation 100% guaranteed comfort The use temperature and humidity thermostats for environment guarantees optimal comfort conditions for each single room. Radiant system management From the control of the heads to the control of the dew temperature, every aspect of the system is constantly monitored and controlled. Managing systems with radiators 7

8 ELFOFresh² Requirement: air quality and energy recovery Building design is changing New building rules and regulations are changing the traditional concept of house These aspects ensure a considerable improvement in the energy performance of the building envelope in new and renovated buildings, though they lead to increasingly airtight buildings. Moreover, the sharp decrease in the required heat load transferred by transmission leads to a reduction in the building's energy demand. In this kind of environment ventilation acquires un ever increasing importance in order to ensure ideal comfort, indeed: indoor pollutants may be trapped inside homes much more dangerous outdoor pollutants introduced without any kind of filtering and purifying treatment can be even more harmful the energy transferred outside during air renewal is always the main factor in terms of the building's energy demand Fresh and clean air with efficient energy recovery There is not real comfort with out a proper air renewal rate as odours and harmful substances accumulate inside the house, too. Therefore, the new building trend illustrated above, which focuses on a considerable improvement of building envelopes, requires a controlled mechanical renewal system for ambient air to ensure the desired renewal values. However, introducing fresh air directly is not always a healthy option and involves high energy costs. Indeed, usually the air we eject has a high energy content that needs to be recovered, though without affecting the systems' overall efficiency. Indoor pollutants affect our health and buildings Indoor activities generate many pollutants, only some of which are evident as they are immediately perceivable (odours, humidity, smoke). In actual fact there are many more sources of pollution that we often do not notice straight away, such as construction materials, furnishings, dispersed dust, mould and microorganisms, cleaning products, carbon dioxide, etc. Outdoor pollutants are more dangerous than indoor ones Fresh air contains pollutants that are more dangerous, such as particulates and fine dust, pollen, bacteria and so on. These affect our health in many ways, including respiratory diseases, often chronic, increase in susceptibility to infections, problems to the cardio-circulatory system. 8

9 ELFOFresh² the Clivet solution for residential Compact unit Fresh air purification and conditioning using the recovery on exhaust air The active thermodynamic recovery amplifies the energy in the exhaust air It works with 100% of fresh air It extracts and Ejects the unhealthy air from indoors after the heat recovery Purified and air-conditioned fresh air inlet The advantages H10 Equivalent filtering efficiency Eliminates the pollution in the buildings where we live It expels unhealthy air and, at the same time, introduces purified and air-conditioned fresh air. With the electronic filters on fresh air, acting as high-efficiency electrostatic purifier, it minimises suspended pollutants such as smoke, fine dust, viruses and nanoparticles. At the same time it reduces the high ventilation consumption generated by the pressure drops common to traditional filters and it also gets rid of the need to change periodically traditional filters because electronic filters can be regenerated by washing. COP 5.9 at 5 C outside Is a high-efficiency active thermodynamic recovery unit Unlike traditional systems, the active thermodynamic circuit recovers all year-round the energy contained in the flow of exhaust air, it multiplies it thanks to heat pump technology and then provides it to the served areas of the building. In this way it minimises load for conditioning fresh air and provides additional capacity to maintain comfort conditions. - 40% Primary Energy in heat Simplifies the system and increases its efficiency Thanks to the packaged system construction, the system components and their installation are already included inside the unit. In addition, the energy generated by the active thermodynamic recovery reduces the power and therefore the cost of the additional air-conditioning system. This comprehensive high-efficiency reduces the user's primary energy consumption even up to 40%. 9

10 ELFOFresh² the Clivet solution A compact air renewal and purification unit for houses from 50 to 90 m 2 Thanks to the new automatic speed control in relation to the pressure drops of the system, the centrifugal fans, which are directly coupled to a DC motor, ensure a constant air flow rate. The benefits deriving from this design solution are featured along the three development and management stages of the system, indeed: It simplifies the design of the air distribution system, as it is not necessary to take into account extremely small tolerances when calculating the pressure drops of the system itself. It makes it easier to install and activate the unit in the event of system configurations carried out during installation that differ from the ones reported on the project. In the event of soiled filters or incorrect cleaning of the system, it prevents the machine from going in stand-by or from less than optimal operation due to a drop in the flow rate. A. Air intake filter It purifies external renewal air before it is introduced in rooms with a standard filter (G3). It can be fitted with an optional high efficiency electrostatic filter (H10). B. "Standard" exhaust air filter These units with reduced power are fitted with the internal G2 filter as standard. C. Supply fan The new control allows to maintain a constant rotation speed as the system's pressure drops vary, with 60% less power absorbed compared to traditional fans. D. Compressor R134a airtight rotary compressor chosen to optimise the reduced power unit with higher performance levels. E. Exhaust fan The new control allows to maintain a constant rotation speed as the system's pressure drops vary, with 60% less power absorbed. R-134a C H M Indoor environment I D A Outdoor environment M. User terminal block The user terminal block is separate from the electrical panel to make operations associated with the unit's electrical connection easier. B L F E G F. Electrical panel Easy to access in order to conduct maintenance and take it out through the designated slots. G. White prepainted aluminium unit H. DN150 air ducts Air distribution system size designed in relation to the unit size. I. Internal exchanger Direct expansion finned coil exchanger with copper pipes and aluminium fins. Reduced pressure drops compared to passive recovery units. L. External exchanger Direct expansion finned coil exchanger with copper pipes and aluminium fins. Reduced pressure drops compared to passive recovery units. Air renewal in relation to the surface of the house: Model Room surface [m 2 ] Volume of a room with h=2,7m [m 3 ] Nominal air flow rate [m 3 /h] Renewal rate [vol/h] 0,65 0,52 0,43 0,37 0,32 0,56 0,49 0,44 0,40 0,37 0,32 0,30 10

11 ELFOFresh² the Clivet solution A compact air renewal and purification unit for houses from 150 to 800 m 2 The heat pump components compressor, thermostatic valve, fans and coils are perfectly integrated into the unit and can be easily accessed for routine maintenance. The electrical panel can be easily controlled remotely. The intake section and the air extraction and exhaust section are clearly separated by a steel panel that prevents contamination between the flows. A. Air intake filter It purifies external renewal air before it is introduced in rooms with a standard G3 intake filter. It can be fitted with an optional high efficiency electrostatic filter (H10). B. "Optional" exhaust air filter When purchasing the unit, it can be fitted with an external return air filter. C. Supply fan It introduces treated air into the room: centrifugal DC electric fan coupled directly to an electric motor. D. Compressor It allows to transfer heat from exhaust air to renewal air. Airtight rotary compressor with R410A. E. Exhaust fan It ejects stale air outdoors: centrifugal DC electric fan coupled directly to an electric motor. C H Indoor environment I D A B Outdoor environment L E G F G F. Remote electrical panel The electrical panel can be controlled remotely to make installation easier. G. Aluzink unit H. DN air ducts Air distribution system size designed in relation to the unit size. I. Internal exchanger Direct expansion finned coil exchanger with copper pipes and aluminium fins. Reduced pressure drops compared to passive recovery units. L. External exchanger Direct expansion finned coil exchanger with copper pipes and aluminium fins. Reduced pressure drops compared to passive recovery units. Air renewal in relation to the surface of the house: Model Room surface [m 2 ] Volume of a room with h=2,7m [m 3 ] Nominal air flow rate [m 3 /h] Renewal rate [vol/h] 0,49 0,37 0,30 0,44 0,37 0,32 0,53 0,37 0,31 0,40 0,34 0,30 11

12 ELFOFresh² The principle of cooling and heating operation The active recovery that does not penalize ventilation The controlled mechanical ventilation system with active recovery consists in a unit equipped with an efficient refrigerant circuit with low pressure drops on the air side and a considerable reduction of the energy for ventilation, respect to the traditional static. The active recovery heat exchangers have high-efficiency finned coils, therefore they have pressure drops absolutely modest during the entire operational cycle. Heating operation The indoor air (A), at a temperature of 20 C, before being released outside (C) becomes the thermal source of the heat pump passing through the evaporation coil (B) so that the heat can be recovered. The cooling fluid of the heat pump, after withdrawing the heat from the exhaust air, through evaporation, releases it to the fresh air (D) through the condensation coil (E) before to be released into the rooms (F). Cooling operation Through the 4-way valve, for sizes from 200 to 650, and the capillaries with the non return valves, for sizes from 70 to 120, the cooling cycle is inverted so that the cold contained in the exhaust air flow (A), is used in the condensation coil (B) before being exhausted (C). The fresh air (D), viene filtrata, is filtered, cooled and subsequently dehumidified passing through the evaporator (E) before being released into the rooms (F). Intermediate season operation (FREE COOLING/FREE HEATING) The fresh air conditions, especially at night, may be more agreeable than the indoor ones, at least in terms of temperature. Houses, in fact, accumulate the heat during the central hours of the day and then let it during the night. In similar conditions, the technology allows the air supply in the room at cost zero, FREE-COOLING, only with the fan operating. The contrary phenomenon, the FREE-HEATING, occurs in particular climatic conditions, e.g. in the South of Italy. Thanks to modulating fans, is possible to introduce in the room an air flow higher than the one strectly necessary to the normal renewal. Outdoor Outdoor Outdoor Indoor Indoor Indoor 12

13 ELFOFresh² improves comfort It renews air which increases well-being The need of fresh air in the rooms where we live is, a question of hygiene as well as comfort. Air renewal must take place in controlled conditions so that the air coming from outside is filtered and suited to the ideal conditions of temperature and humidity. Temperature in heating allows the intake of fresh air into the rooms at a temperature always higher than any other system; particularly in extreme climate conditions, this avoid for the air intake the low temperatures to compromise the comfort. Through the natural ventilation, the air intake temperature corresponds to the outside air temperature. By using a passive recovery, the intake temperature is always lower than 20 C and decreases as the outside temperature decreases. Intake temperature into the room [ C], guarantees the comfort down to a temperature of 5 C; at lower temperatures, however, the intake temperature is maintained at around 17 C. Fresh air temperature [ C] Temperature in cooling The natural ventilation has the air intake temperature corresponding to the outside temperature. By using a passive recovery during specific hours, the risk is that the intake air has higher temperature than the outside one. By using an active recovery, the comfort is always guaranteed: at outdoor temperature higher than 30 C, the intake temperature is maintained at 16 C. Intake temperature into the room [ C] Fresh air temperature [ C] Humidity control During summer operations, the active thermodynamic recovery cools and dehumidifies the fresh air. can be used combined with cooling systems that use radiant panels (wall, floor, or ceiling), with no need of other dehumidifiers installed in the rooms. The passive recovery do not perform the fresh air dehumidification, while the enthalpy rotating recovery are only able to perform a partial dehumidification. The automatic adjustment of the air flow rate (A) of the direct current fans, controls the delivery air humidity (C) and the internal room humidity (B). Relative humidity [g/ Fresh air temperature [ C] Portata [m 3 /h] Air quality rejects the unhealthy air from bathrooms and kitchen, or from rooms with the higher concentration of pollutants. It also pre-treats the fresh air, released into the living rooms and the bedrooms, by filtering, humidifying or dehumidifying it and taking it at the correct temperature. The fresh and healthy air can be always guaranteed in our houses. All this, with minimum electrical consumption. 13

14 ELFOFresh² reduces consumptions and increases the value of your house Maximum seasonal efficiency Unlike traditional systems, the active thermodynamic circuit recovers the energy contained in the flow of exhaust air, it multiplies it using heat pump technology and then provides it to the served building with high efficiency. Heating: - 40% The energy efficiency is very high because the heat source, with which such heat pump operates, is the exhaust air, having favourable conditions. During winter operation, for example, with fresh air temperature 5 C and extracted air at 20 C, the COP is higher than 5.5. The heating capacity minimizes the fresh air load, providing further power to maintain the comfort conditions. The result for TRADITIONAL SOLUTION: - BOILER = 98% - CROSSOVER FLOW RECOVERY, EFFICIENCY 70% Total of electrical energy Total of heat energy Total of primary energy Delivered energy ENERGY REQUIRE- MENT OF THE BUILDING Primary energy in heat ELFOSystem SOLUTION: - GAIA - ELFOFresh² Recovery energy Delivered energy Total of primary energy users is a reduction up to 40% of the heat primary energy consumption than a traditional system. Electrical energy Electrical energy CLASS A Cooling: -30% Besides recovering the exhaust air heat that, unlike the traditional system also takes place during summer operation, the active recovery generates a quantity of energy supplied to the building also during summer. In this way, the active recovery compensate the heat loss through walls and roof of the building. TRADITIONAL SOLUTION: - SPLIT - CROSSOVER FLOW RECOVERY, EFFICIENCY 70% Total of electrical energy Total of electrical energy Recovery energy Delivered energy ENERGY REQUIREMENT OF THE BUILDING ELFOSystem SOLUTION: - GAIA - ELFOFresh² Recovery energy Delivered energy Electrical energy Electrical energy Therefore, is able to reduce the 30% of cooling primary energy versus a traditional system with a passive recovery and direct expansion system. Total of primary energy Primary energy in heat Total of primary energy 14

15 ELFOFresh² reduces consumptions and increases the value of your house Multiplies the energy recovered from exhaust air Passive cross-flow recovery unit and 70% efficiency rate The passive recovery unit is able to supply, by recovering it from exhaust air, only a small percentage of the energy required by the building. Therefore, the residual demand needs to be provided by a generator, which in the illustrated case is a traditional boiler. The system's seasonal efficiency drops considerably due to the poor contribution of the recovery unit. Delivered heat energy [kwh] 30% Building needs Crossover flow recovery Fresh air temperature [ C] thermodynamic recovery unit The graph shows how under the same ambient conditions and in the same building, the part of energy that is recovered and supplied in the room can be as high as 80% of the overall energy demand. The favourable conditions operates in and the important contribution in terms of energy supplied ensure a relevant input to the seasonal efficiency of the whole system. Delivered heat energy [kwh] 80% Building needs ELFOFresh² Fresh air temperature [ C] Miglioramenti della Classe Energetica dell edificio ELFOFresh² s efficiency reduces the absorbed primary energy in comparison to a traditional system. The example shows that, having the same building features (insulation, doors and windows, etc.), replacing the crossover flows recovery with ELFOFresh² unit, the class of energy efficiency increases from C to B. Also, considering the use of Gaia as a primary generator, the building energy class becomes A, thus remarkably increasing the building value. 20,8 Heat pump + active recovery + photovoltaic sources Heat pump + active recovery Boiler + active recovery Boiler 98% + passive recovery 70% Boiler 98% NOTES: This ex. refers to the energy efficiency classification according to the Italian guidelines, as per Law Decree dated 26 June, 2009, for a single house in Milan, with climate class E, and with the following features: Floor surface: 200m2; heated gross volume: 600m3; dispersing surface: 440m2; S/V ratio: 0.73m-1. Walls and roof insulation: compared to the limit U- value as per law (Uwalls: 0.34; Uroof 0.30; Ubasement 0.33; Uwindows: 2.2 W/m2K). 15

16 ELFOFresh² air flow modulation The new fans in direct current gave saving 60% for the absorbed capacity The energetic consumption for the ventilation represents the main cost for the fresh air units. In order to reduce the operating costs and obtain the highest energy saving, all units have high-efficiency fans with electric control in direct current: an energy saving 60% than traditional fans is guaranteed. The electronic control the automatic modulation of the air flow that, according to the requirements, can increase, in case of FREE-COOLING, or decrease for the dehumidification, extending the functional limits, and limiting the optional use of modular electric heaters from 0,7 or 3 kw (optional) only for exceptional situations. Another feature of the new fans is the possibility to change the available pressure (according to the pressure drop of the ducts). The unit is configurated for 40 Pa available head; by changing some parameters it is possible to reach up to 120 Pa. The air flow reduction guarantees the comfort during winter operation In correspondence to the low temperature values of the fresh air (lower than 5 C), the intake temperature is fixed (I), approximately equal to the indoor air (20 C) using the air flow reduction (A). This reduction is performed in order to avoid the intake of fresh air in the rooms that might cause the risk of uncomfortable cold draughts. In this conditions, the active thermodynamic recovery can completely satisfy the ventilation load. Nominal air flow operating: fulfill of the building load in addition of the ventilation In the range of fresh air temperature between 5 C and + 20 C, the fresh air flow rate keeps constant (B): the intake temperature in the room (II) increases as the fresh air temperature increases;, besides compensating the ventilation dispersions, is able to fulfil, either completely or partially, the building load for heating of building. Increase of air flow rate for cooling the rooms in middle season In the range between + 20 C and + 25 C the building might need being cooled, though without relevant need, it is also possible to perform the free-cooling, by simply allowing a higher air flow rate into the rooms and leaving the compressor deactivated (C). In this case, the efficiency is defined as the ratio between the cooling capacity delivered to the room by the fresh air (directly proportional to the temperature difference between outdoor and indoor, according to the fresh air flow rate) and the absorbed electric capacity (in such case, only by the fans). Due to the reduced absorption of the fans, it is possible to reach a very high efficiency in this operating condition. The intake temperature in the room is exactly equal to the outside one (III). Reducing the air flow rate to dehumidify For a more efficient dehumidification of the fresh air, reduces the flow rate by modulating the fan speed (D); in this way, it is possible to cool the rooms by using radiant panels with a subsequent efficient dehumidification. Air flow [m 3 /h] Intake air temperature [ C] Fresh air temperature [ C] Fresh air temperature [ C] 16

17 ELFOFresh² fresh air with the new H10 electronic filters Increase of the filtration efficiency and decrease of the operating costs Simply providing fresh air to dilute external pollutants is not a solution, additional polluting agents contained in fresh air. The new electronic filters available for make fresh air even more efficient and at the same time they reduce costs for ventilation and maintenance compared with traditional systems. High efficiency filters (F7 category) of a traditional system increase the energy spent on ventilation, because of greater loss of pressure and also require more frequent maintenance, with a significant cost at the end of each year to replace the filters. The efficiency of electronic filter on is equivalent to classification H10 used in traditional filters, that is the category indicated as "absolute filter". These are effective even against: Smoke Fine dust Particulates PM10, PM2,5, PM1 Bacteria Germs and viruses Nano-particle 1000 μm 100 μm 10 μm 1 μm 0,1 μm RAIN POLLEN DUST FINE DUST MOULD BACTERIA SMOG VIRUS CLEAN AIR G4 F7 G4 ELECTRONIC The ventilation energy is reduced The very high efficiency of filtration is achieved with virtually negligible loss of pressure. Indeed mechanical filtering is replaced by electronic filtering, which does not prevent air from passing through and ensures negligible pressure drops. Air quality Always under control Air filtering is an essential function for ensure proper wellbeing and hygiene conditions are maintained in the areas served. Moreover, 's control reports when it is necessary to clean the electronic filter to always ensure it is used correctly. 17

18 ELFOFresh Air ideal system for the air distribution Clivet s modular solution The modular solution to distribute air through manifolds Issues related to the selection, size and installation of the air distribution and the elements fitted on a traditional system are eliminated thanks to ELFOFresh Air. A clever mix of functionality and reliability, ELFOFresh Air is the exclusive system that is perfectly combined with ELFOFresh2 to provide fresh air in domestic settings. ANF Fixing loop BD12CX Distribution Box HSE3LX EHPCX Heaters (optional) TFI200X Insulated hose GR200 External air gille ANT Seal ring ADV Valve adapter TFP50X Flat flexible pipe ANT Seal ring FAEX Intake air filter ADV Valve adapter VIMM Air supply valve GIUN Joint for flat hose TAP Closure plug REGP Flow controller CO90 Horizontal curve VEST Extraction valve CV90 Vertical curve GRIVE/GRINO Outlet grille Suited to all needs ADGP Grille adapter ANT Seal ring Simple to install Minimum space requirement Antistatic and Antibacterial Underfloor, false-ceiling and wall installation In new buildings and redevelopment works on existing buildings ELFOFresh Air is the best solution to fully enjoy the benefits of the ELFOFresh2 ventilation system thanks to its stepped flexible ducts. These are ideal for underfloor applications, as well as for installations in attics and false ceilings. Specially designed grids and outlets can also be fitted and can be perfectly integrated in any kind of architectural context. Simple to install ELFOFresh Air is the plug&play distribution system that reduces installation times by 50%. The simple and user-friendly connection between its elements guarantees a perfect seal and reliability of the distribution system. Minimum Size The choice to only use flat flexible ducts allows to contain the space required for installation and leaves the designer and installer full freedom both in terms of design and installation of the air distribution system. Antistatic and Antibacterial The inner surface of the flexible ducts is lined with a special plastic film treated with silver ions that provides excellent antistatic and antibacterial properties and guarantees top hygiene levels of the treated air

19 ELFOFresh Air ideal system for the air distribution Air renewal in the room La corretta distribuzione dell aria negli ambienti domestici. ELFOFresh Air is the modular air distribution system with manifolds that consists of an air distribution box, flat flexible ducts, horizontal and vertical moulded curves, seal and joint rings, diffusers and accessories made with plastic material and is ideal to guarantee the correct distribution of air in different environments. The manifold distribution ensures the self-balancing of the system and therefore guarantees maximum flexibility in positioning the supply/return grids and outlets and the correct air speed inside the ducts. Minimum radius 400mm The flow rate of the individual ducts is set using specific flow regulation device positioned at the outlet of the distribution box. The setting is conducted after completing the installation of all the elements when the ventilation system is turned on. The flexible duct is easy to install and can be connected to all the other components of the system without the need for special equipment. The insulation of the channelling removes the risk of condensation forming on the external surfaces of the ducts themselves. Minimum radius 200mm The ELFOFresh Air system includes a comprehensive series of accessories that are essential to ensure the installation and the perfect operation of the aeraulic distribution of ELFOFresh². ELFOFresh Air Configurator Thanks to ELFOFresh Air Configurator, the selection and dimensioning software, the ELFOFresh Air solution is designed in little time and with no errors. A simple and powerful tool, available from that provides an essential support for all professionals to install the air renewal system. ducts ELFOFresh²'s connection to the distribution system of the internal and fresh air is conducted by using flexible insulated circular ducts that guarantee the thermal and acoustic insulation of the ducts. The antibacterial treatment of the inner surfaces ensures the quality of the fresh air. The reduced pitch of the spiral ensures a greater mechanical strength compared to traditional solutions and does not alter the duct's crosssection, even if there is a large radius of curvature. 19

20 ELFOFresh² MAKE UP AND PURIFICATION UNIT WITH ACTIVE THERMODYNAMIC RECOVERY FOR INDOOR INSTALLATION. Technical section index: Standard specifications Pag. 21 Unit configuration Pag. 22 Sound levels Pag. 22 General Technical specifications Pag. 23 Electrical data Pag Operation range Pag. 25 Design criteria Pag operation and performance criteria Pag accessories Pag ELFOFresh Air System design criteria Pag ELFOFresh Air accessories Pag ELFOFresh Air accessory pressure drops tables Pag. 51 Dimensional drawings and Functional clearances Pag

21 STANDARD UNIT SPECIFICATIONS COMPRESSOR hermetic rotary compressor with gas compression in the crankcase, direct suction, no oil heater. It is mounted on antivibration rubber pads. Includes oil feed. Fitted on rubber antivibration mounts and complete with oil charge and suction filter. STRUCTURE Sizes : Supporting structure made with RAL 9001 prepainted sheet metal that ensures excellent mechanical features and high long-term resilience against corrosion. The entire ventilating area is covered with anti-condensation and sound-proof material. Sizes : Structure made entirely from "aluzink" plate that guarantees excellent mechanical characteristics and high corrosion strength over time. The ventilating section is completely lined with anti-condensate and soundproofing material. INTERNAL EXCHANGER Exchanger for the fresh air handling Direct expansion finned exchanger, made from copper pipes in staggered rows and mechanically expanded to the fin collars. The fins are made from aluminium with a corrugated surface and adequately distanced to ensure the maximum heat exchange efficiency. The surface of the fins of the coils has been subjected to a hydrophilic treatment to make it easier to discharge condensation and reduce frost. EXTERNAL EXCHANGER Exchanger for the energy recovery of the extract air Direct expansion finned exchanger, made from copper pipes in staggered rows and mechanically expanded to the fin collars. The fins are made from aluminium with a corrugated surface and adequately distanced to ensure the maximum heat exchange efficiency. The surface of the fins of the coils has been subjected to an hydrophilic treatment to make it easier to discharge condensation and reduce frost. REFRIGERANT CIRCUIT The circuit is complete with: - refrigerant charge - high pressure switch - pressure probes - 4-way reverse cycle valve - capillary as a laminating device (size ) - thermostatic valve like expansion device (size ) - liquid receiver TRAY Sizes : Thermoformed ABS condensate collection tray fitted with drain pipe. Sizes : Condensate collecting tray in aluminium alloy 1050 H24 with anticondensate insulation, welded and equipped with discharge coupling. FAN Sizes : Brushless centrifugal fan in supplì and expulsion at high energy efficiency with single intake directly coupled to the electric motor with scroll and pallets of metal. Sizes : Brushless centrifugal fan in supplì and expulsion at high energy efficiency with double intake directly coupled to the electric motor with plastic scroll diameter 146 mm and pallets of metal. FILTRATION Pleated filter, made up of a galvanized plate frame with galvanized and electric-welded protective mesh and 100% regenerable polyester filtering media with PVC resin. G3 efficiency according to CEN-EN 779 standard (Eurovent class EU3 - average efficiency 84% ASHRAE Atm). Self-extinguishing (resistance to fire class 1 - DIN 53438). (size ) Metal mesh pre-filter with G1 efficiency level (size ) Flat filter used for the return of fresh air and ambient air, consisting of a galvanized sheet metal frame with galvanized electrowelded protective meshes and 100% polyester renewable filtering septum with G2 efficiency level in accordance with the CEN-EN 779 standard (size ). ELECTRICAL PANEL Sizes : Electrical panel located inside the unit and can be easily accessed from the bottom or sides via the removable panels. Sizes : The electrical panel assembled outside the unit is connected to it by a fast- connect cable (2 m) its remotization in positions where the maintenance/control of the parameters is easier. Sizes : The power section includes: - Fuses, compressor and fan - Fan control contactors. - Compressor control contactor. The control section is made up of a card with microprocessor control that allows the unit control according to the different air input conditions. The control section includes: - Probe of the fresh air temperature. - Probe to measure the temperature and supply air humidity of the room - Temperature probe of the air return from the ambient (thermostat) - Remote ON/OFF THERMOSTAT The HID-P1 local room control allows to control just one ElfoFresh2 unit - Setting the desired temperature and humidity On/Off Summer / Winter change Setting the ventilation-only mode - Diagnostics management with specific code according to the type of error Dimensions: 184X82X27 mm. The thermostat is connected to the unit through a shielded pair at a distance of max 15 m FRESH AIR BYPASS DAMPER Damper that draws air from the fresh air intake and brings it up to the exhaust coil. the damper, by means of an on-off actuator, is opened in summer operating, with the compressor in operation and with exhaust fan at max. speed, so as to increase the air flow to the condensing coil: in this way, cooling efficiency is increased without creating negative pressure in the room. ANTIVIBRATION MOUNTS Ceiling and floor spring antivibration mounts kit. The anti-vibration kit consists of 4 base spring vibration isolators, 4 m8 nuts, 4 m8 screws ACCESSORIES SEPARATELY SUPPLIED - CDPX : condensate discharge pump (size ) - EHPCX : electric heaters 0,7 kw in duct (size ) electric heaters 1,5/3 kw in duct (size ) - FSEX : Electronic filter (size ) - HSE3LX: Immersed electrode humidifier DN200 (size ) - HSE3MX: Immersed electrode humidifier DN250 (size ) - FAEX : Exhaust air filter (size ) - ELFOFresh Air, AIR DISTRIBUTION ELFOFresh Air Option list at page 45 21

22 UNIT CONFIGURATIONS (1) FILTRATION FAS = Pleated filter G3 (Standard) FES = Electronic filter (2) CONTROL SYSTEMS CHIDP1 = HID-P1 thermostat (Standard) PRELF = Setup to ELFOSystem with RS485 Modbus HIDRS = HID-P1 thermostat and RS485 Modbus serial port (3) FILTER DIFFERENTIAL PRESSURE SWITCH - = without pressure switch (Standard) PSAE = filter differential pressure switch on fresh air SOUND LEVELS Sound levels refer to the unit at full load installed on the ceiling, ducted, with nominal fan air flow rate. Available static pressure 40 Pa. SIZE Sound Power Level (db) Octave band (Hz) Sound pressure level Sound power level Il In accordance with the UNI-EN ISO 3744 regulation, the average sound pressure level refers to a distance of 1 m from the outer surface of a unit operating in open field db(a) db(a) The power measurements are taken in accordance with the UNI EN ISO standard, with a ducted unit installed near a reflective surface If the unit is installed in conditions other than the nominal ones(for instance, near walls or obstacles in generally) the sound levels may undergo substantial variations. 22

23 GENERAL TECHNICAL SPECIFICATIONS SIZES COOLING AE 30 C Cooling capacity 1 kw 0,429 0,813 1,57 2,10 3,01 4,03 Compressor power input 1 kw 0,164 0,279 0,498 0,640 0,916 1,29 Total power input 1 kw 0,189 0,315 0,542 0,700 1,04 1,48 EER (EN ) 1 2,27 2,58 2,90 3,00 2,91 2,72 COOLING AE 35 C Cooling capacity 2 kw 0,446 0,846 1,63 2,17 3,13 4,23 Compressor power input 2 kw 0,174 0,297 0,523 0,674 0,976 1,33 Total power input 2 kw 0,199 0,333 0,567 0,734 1,096 1,519 EER (EN ) 2 2,24 2,54 2,87 2,96 2,86 2,78 HEATING AE 7 C Heating capacity 3 kw 0,517 0,984 1,81 2,33 3,58 5,00 Compressor power input 3 kw 0,139 0,235 0,401 0,541 0,748 1,12 Total power input 3 kw 0,153 0,252 0,441 0,593 0,838 1,27 COP (EN ) 3 3,38 3,90 4,10 3,93 4,27 3,94 HEATING AE 5 C Heating capacity 4 kw 0,517 0,971 1,86 2,35 3,74 5,10 Compressor power input 4 kw 0,110 0,188 0,320 0,379 0,582 0,846 Total power input 4 kw 0,124 0,205 0,360 0,431 0,672 0,996 COP (EN ) 4 4,17 4,74 5,17 5,45 5,57 5,12 COMPRESSOR Type of compressors ROT ROT ROT ROT ROT ROT No. of Compressors Nr Type of refrigerant R134a R134a R410A R410A R410A R410A FANS Type of fans CFG CFG CFG CFG CFG CFG Number of fans Nr Air flow mch Fan input power 5 kw 0,014 0,017 0,040 0,052 0,090 0,150 Available nominal pressure Pa Max external static pressure Pa CONNECTIONS Condensate discharge mm POWER SUPPLY Standard power supply V 230/1/50 230/1/50 230/1/50 230/1/50 230/1/50 230/1/50 SOUND LEVELS Sound pressure level (1m) 6 db(a) (1) AE 30 C: Data referred to the following conditions: fresh air temperature : 30 C BS/ 22.0 C BU indoor air temperature : 27 C BS/ 19 C BU nominal air flow (2) AE 35 C : Data referred to the following conditions: fresh air temperature : 35 C BS/ 24.0 C BU indoor air temperature : 27 C BS/ 19 C BU nominal air flow (3) AE 7 C :Data referred to the following conditions: fresh air temperature : 7 C BS/ 6 C BU indoor air temperature : 20 C BS/ 15 C BU nominal air flow (4) AE 5 C :Data referred to the following conditions: fresh air temperature : -5 C BS/ -5.4 C BU indoor air temperature : 20 C BS/ 15 C BU nominal air flow (5) the fan absorptions refer to the air flows of the heating operation (conditions as indicated in note (3)) and 40Pa of available pressure (6) The sound levels are referred to units working at full load in nominal conditions. The sound pressure level is referred at a distance of 1 m. from the ducted unit surface operating in free field conditions. ELECTRICAL DATA VOLTAGE: 230/1/50 SIZES F.L.A. FULL LOAD CURRENT AT MAX ADMISSIBLE CONDITIONS F.L.A. - Compressor 1 A 0,87 1,62 2,2 3,1 4,7 6,8 F.L.A. - Single Outlet fan A 0,3 0,9 1,2 1,2 1,2 1,2 F.L.A. - Single exhaust air fan A 0,3 0,9 1,2 1,2 1,2 1,2 F.L.A. - Total A 1,47 3,42 5,6 6,5 8,1 10,2 L.R.A. LOCKED ROTOR AMPERES L.R.A. - Compressor 1 A 4,35 8, , F.L.I. FULL LOAD POWER INPUT AT MAX ADMISSIBLE CONDITION F.L.I. - Compressor 1 kw 0,19 0,34 0,47 0,69 1,03 1,52 F.L.I. - Single Outlet fan kw 0,037 0,115 0,165 0,165 0,165 0,165 F.L.I. - Single exhaust air fan kw 0,037 0,115 0,165 0,165 0,165 0,165 F.L.I. - Total kw 0,264 0,57 1,03 1,25 1,59 2,08 M.I.C. MAXIMUM INRUSH CURRENT M.I.C. - Value A 4,95 9,9 14,4 18,9 23,4 39,4 Power supply 230/1/50Hz +/- 6% 23

24 ELECTRICAL INPUT OF THE OPTIONAL COMPONENTS To obtain the electrical input of the unit including accessories, add the standard data in Electrical Data table to those for the selected accessories. SIZES F.L.A. FULL LOAD CURRENT AT MAX ADMISSIBLE CONDITIONS F.L.A. EHPCX - Preheating electric heaters from 0.7 kw A 3,04 3, F.L.A. EHPCX - Preheating electric heaters from 1.5 kw A F.L.A. EHPCX - Preheating electric heaters from 3 kw A F.L.A. HSE3MX/HSE3LX - Electrode boiler steam humidifier from 3 kg/h A F.L.A. FES/FESX - Electronic filter A F.L.A. CDP - Condensate discharge pump A F.L.I. FULL LOAD POWER INPUT F.L.I. EHPCX - Preheating electric heaters from 0.7 kw kw F.L.I. EHPCX - Preheating electric heaters from 1.5 kw kw F.L.I. EHPCX - Preheating electric heaters from 3 kw kw F.L.I. HSE3MX/HSE3LX - Electrode boiler steam humidifier from 3 kg/h kw F.L.I. FES/FESX - Electronic filter kw F.L.I. CDP - Condensate discharge pump kw ELECTRICAL INPUT OF THE FAN Fan electrical input (W) Available pressure (Pa) Electrical input of the single fan in conditions of standard flow in heating. - Fresh air 7 C, - Air inlet 20 C, 50%. PRESSURE DROPS OF OPTIONAL COMPONENTS The value of static pressure available on the supply and return duct is obtained by subtracting from the available net maximum pressure (see general table of technical data) the pressure drops of any accessories. SIZES PRESSURE DROPS EHPCX - Preheating electric heaters from 0.7 kw Pa EHPCX - Preheating electric heaters from 1.5 kw Pa EHPCX - Preheating electric heaters from 3 kw Pa HSE3MX/HSE3LX - Electrode boiler steam humidifier from 3 kg/h Pa FES/FESX - Electronic filter 1 Pa FAEX - Exaust air filter 2 Pa The values shown are to be considered approximate for units operating power in normal use with standard air flow rate. (1) Pressure drop difference in comparison with pleated filter standard G3 (2) Pressure drops with filters with average dirtiness 24

25 OPERATING RANGE (COOLING) FRESH AIR TEMPERATURE [ C] (1) The limits are indicative and have been calculated considering: - values general and not specifications, - clean filters and coils - non-critical positioning and correct use and maintenance of the unit, - operation at full load (1) operation field with relative outdoor Humidity < 40% (2) zone of possible operation in Free Cooling (2) INDOOR RETURN AIR TEMPERATURE [ C] OPERATING RANGE (HEATING) FRESH AIR TEMPERATURE [ C] (1) (2) (3) The limits are indicative and have been calculated considering: - values general and not specifications, - clean filters and coils - non-critical positioning and correct use and maintenance of the unit, - relative humidity of the return air > 50% (1) zone of possible operation in Free Heating (2) the broken line identifies the operation limit of the standard unit with internal relative humidity < 40% (3) operating range with return air flow modulation. In case of a long permanence in this zone it is recommended the use of the electrical resistance of modulating pre-heating accessory. INDOOR RETURN AIR TEMPERATURE [ C] 25

26 DESIGN CRITERIA SIZE SELECTION is available in the four traditional sizes, with air flow rate respectively of m 3 /h and from today in the new sizes with air flow rate respectively of 70 e 120 m 3 /h. The recovery size is selected according to the air exchange volumes. In the framework of residential ventilation, the calculation of the necessary air flow rate according to the type of house can be performed through the air renewal method, i.e. the number of times that it is necessary to integrally change the air in the room over a specific period (generally, it is considered as no. of changes/hour or volumes/hour). As for houses, it is a good habit to perform air renewals of 0.5 volumes/hour, max. 1 volume/hour. It is also necessary to consider that the calculation of the hourly volumes must be performed by considering the volume of the rooms into which the air is released, thus excluding the volume of the room where the air is withdrawn. Typically, the air is released into living rooms, bedrooms, studios, etc. while it is withdrawn from service rooms, in which the presence of smells and humidity is higher, e.g. bathroom and kitchen. The selection is performed by only considering the noble rooms (intake volumes), since the rooms making the house are considered as in series: SUPPLY AIR EXHAUST AIR Bedroom Daytime area Bathroom Kitchen CASE STUDY To illustrate the design criteria of follows is a typical example of an application that looks at a house of 180 m 2 consists of 9 rooms. In the table below is indicated the subdivision of the fresh air flow in the main rooms and the subdivision of the exhaust air flow of the service rooms. Room Surface Height Volume of main rooms volume of service rooms Supply air quantity Return air quantity m 2 m m 3 m 3 m 3 /h m 3 /h 1 Kitchen 24 64,8 72,7 2 Corridor 13 35,1 39,4 3 Bathroom 15 40,5 45,5 4 Bedroom 12 32,4 21,1 5 Bedroom 13 2,7 35,1 22,8 6 Bedroom 25 67,5 43,9 7 Bathroom 14 37,8 42,4 8 Study room 14 37,8 24,6 9 Livingroom ,7 TOTAL ,8 178, Air renewals (Vol/h) 0,65 1,12 Considering a request of 0,5 Volumes/Hour of air renewal, the air flow necessary will be of 307,8 x 0,5 = 153,9 m3/h. The size to use will be therefore ELFOFresh2 200 with an air flow of 200m3/h. The actual air change will be therefore 200 / 307,8 = 0,65 Vol./h. 26

27 In the last two columns of the table are the air flow necessary for each individual room in order to ensure the proper fresh air. The supply air flow for each room shall be equal to the rate of renewal in main room multiplied by the volume of the main room considered. In the case of the study (8), the scope of the required air flow will be equal to: Q supply,8 = 0,65 * 37,8 = 24,6 m 3 /h Similarly, return air flow rate for the single room will be equal to the rate of renewal service rooms multiplied by the volume of the service room in question. For example, in the Kitchen (room 1) has: Q return,1 = 1,12 * 64,8 = 72,7 m 3 /h In the following house map there are the different room numbers and there are indicated the positioning of the unit. They have also been indicated for each room the positions of the exhaust air outlet vents and those of the supply fresh air, according to the principle should be sent to the main rooms (Kitchen,rooms, study, etc. ) and the returns in the rooms where the production of moisture and odours is greatest (kitchen, bathroom, laundry, lockers, etc. ). Q=21,1 m 3 /h ELFO Fresh 2 Q=45,5 m 3 /h 5 Q=22,8 m 3 /h 3 Q=72,7 m 3 /h Q=39,4 m 3 /h Q=43,9 m 3 /h Q=24,6 m 3 /h Q=42,4 m 3 /h 9 Q=87,7 m 3 /h Note: where the designer would follow the UNI EN technical regulations, he must consider the overcrowding respecting the requested parameters of 11 l/s (40m 3 /h) of air renewal per person and at least 4 volumes per hour of air renewal in the bathroom. 27

28 READING OF GRAPHICS ABOUT OPERATION AND PERFORMANCES CRITERIA HEATING COOLING AIR FLOW MODULATION COMPRESSOR ON-OFF FREE COOLING AIR FLOW MODULATION FOR DEUMIDIFICATION Fresh air temperature [ C] The graphic refers to size 300 and to standard set-point for a residential application and represents the trend of three variables at the fresh air temperature changing: A COP/EER of the unit B Set-point temperature C Supply air temperature in the room The variation of the air supply temperature in the room is usefull to understand the unit operating. In the first stretch from 15 C to 5 C in heating the return temperature is mainteined to a comfort value (in the example 17 C) by the modulation of the return air flow in the room. To maintain the nominal air renewal it is possible to use the pre-heating mudulating electrical heater option in duct. In the stretch from 5 C to +13 C, where the unit operates with a nominal air flow and with the compressor still operating, the supply air temperature increases at the outside temperature increasing. Typically in the range of temperatures between +13 C and +20 C the compressor operates in an on-off operating (satisfied thermoregulation) and the actual supply temperature is represented by the broken line that is the average between the one that occurs when the compressor is on and the one when the compressor is off that is equal to outside temperature(the unit operates automatically in ventilation only). In the stretch from 20 C to 24 C, assuming an ambient set-point higher than the outdoor temperature, the compressor is always off and the unit operates in free-cooling, i.e. in ventilation only. In this operating mode the COP is maximum, in fact the only absorbed capacity is that of EC fans and the input, although low, increases with the increasing of the temperature difference between outdoor and indoor. In the next stretch from 24 C to 30 C the compressor is activated in cooling and the supply temperature is around C to satisfy the thermoregulation. In general, the in cooling will adjust the fan speed whenever is necessary to decrease the humidity level in the room, according to the set value. This behaviour is shown in the example from 30 C to 38 C with an inner set of 26 C with 50% of humidity. At 38 C outside the maintains in supply a specific humidity of 10,5 g/kg with a flow reduction of 50% from nominal 300 mch to

29 OPERATION AND PERFORMANCE CRITERIA HEATING COOLING AIR FLOW MODULATION COMPRESSOR ON-OFF FREE COOLING AIR FLOW MODULATION FOR DEUMIDIFICATION Fresh air temperature [ C] In the graph are represented the following variables: D Cooling/Heating performance (W) E Power input (W) F Inner specific humidity (g/kg) G External specific humidity (g/kg) H Supply specific humidity (g/kg) I Input air flow (mch) As indicated in the graph of the previous page hereinafter are highlighted the 6 standard operating range: Heating with modulation of air flow in the room: the performance decreases due to the reduction of the air flow necessary to maintain to a comfort level the supply temperature (in the example it is supposed 17 C). By the use of the modulating electrical resistances (optional) the comfort remains at the highest levels without penalizing the air renewals in the room. Heating: the heating performance is constant and independent from the outside temperature and therefore, at its decreasing, the colder air temperature on the handling coil decreases the condensation reducing the compressor absorbed capacity. This behaviour is highlighted by the COP increasing. Compressor on-off in heating: depending on the room set satisfaction, compressor on periods will alternate with ventilation only periods, their period will increase at the outside temperature increasing. FREE-COOLING the air flow increases to utilize at maximum the free energy of the FREE-COOLING. Cooling: modulating the air flow, the unit tries to keep the input air temperature at optimal comfort levels. Air flow modulation for dehumidification in cooling: the reduction of the air flow in cooling allows to have an input air with an humidity equal to the humidity set in the room. Introducing fresh air with controlled humidity in rooms as the daytime area and the bedrooms and rejecting air from rooms that produce humidity (kitchen and bathrooms) means to avoid the increasing of the humidity in the room. 29

30 SIZE 70 OPERATION AND PERFORMANCE CRITERIA HEATING COOLING Fresh air temperature [ C] In the graph are represented the following variables: A Performance coefficient in heating (COP) and in cooling (EER): it is the ratio between the delivered capacity and the capacity absorbed by the compressor, the auxiliary circuit and from fans considering an available pressure of 50 Pa; B Desired temperature in the room ( C) C supply air temperature in the room ( C) HEATING COOLING Fresh air temperature [ C] In the graph are represented the following variables: D Cooling/Heating performance (W) E Power input (W) F Inner specific humidity (g/kg) G External specific humidity(g/kg) H Supply specific humidity (g/kg) I Input air flow (mch) In places where the fresh air temperature falls down -5 C for many hours a year it is recommended to use the EHPCX accessory - electric heater kit in duct. 30

31 SIZE 120 OPERATION AND PERFORMANCE CRITERIA HEATING COOLING Fresh air temperature [ C] In the graph are represented the following variables: A Performance coefficient in heating (COP) and in cooling (EER): it is the ratio between the delivered capacity and the capacity absorbed by the compressor, the auxiliary circuit and from fans considering an available pressure of 50 Pa; B Desired temperature in the room ( C) C supply air temperature in the room ( C) HEATING COOLING In the graph are represented the following variables: D Cooling/Heating performance (W) E Power input (W) F Inner specific humidity (g/kg) G External specific humidity(g/kg) H Supply specific humidity (g/kg) I Input air flow (mch) Fresh air temperature [ C] In places where the fresh air temperature falls down -5 C for many hours a year it is recommended to use the EHPCX accessory - electric heater kit in duct. 31

32 SIZE 200 OPERATION AND PERFORMANCE CRITERIA HEATING COOLING Temperatura Aria Esterna [ C] Fresh air temperature [ C] In the graph are represented the following variables: A Performance coefficient in heating (COP) and in cooling (EER): it is the ratio between the delivered capacity and the capacity absorbed by the compressor, the auxiliary circuit and from fans considering an available pressure of 50 Pa; B Desired temperature in the room ( C) C supply air temperature in the room ( C) HEATING COOLING In the graph are represented the following variables: D Cooling/Heating performance (W) E Power input (W) F Inner specific humidity (g/kg) G External specific humidity(g/kg) H Supply specific humidity (g/kg) I Input air flow (mch) Fresh air temperature [ C] In places where the fresh air temperature falls down -5 C for many hours a year it is recommended to use the EHPCX accessory - electric heater kit in duct. 32

33 SIZE 300 OPERATION AND PERFORMANCE CRITERIA HEATING COOLING Temperatura Aria Esterna [ C] Fresh air temperature [ C] In the graph are represented the following variables: A Performance coefficient in heating (COP) and in cooling (EER): it is the ratio between the delivered capacity and the capacity absorbed by the compressor, the auxiliary circuit and from fans considering an available pressure of 50 Pa; B Desired temperature in the room ( C) C supply air temperature in the room ( C) HEATING COOLING In the graph are represented the following variables: D Cooling/Heating performance (W) E Power input (W) F Inner specific humidity (g/kg) G External specific humidity(g/kg) H Supply specific humidity (g/kg) I Input air flow (mch) Temperatura Aria Esterna [ C] Fresh air temperature [ C] In places where the fresh air temperature falls down -5 C for many hours a year it is recommended to use the EHPCX accessory - electric heater kit in duct. 33

34 SIZE 500 OPERATION AND PERFORMANCE CRITERIA HEATING COOLING Fresh air temperature [ C] In the graph are represented the following variables: A Performance coefficient in heating (COP) and in cooling (EER): it is the ratio between the delivered capacity and the capacity absorbed by the compressor, the auxiliary circuit and from fans considering an available pressure of 50 Pa; B Desired temperature in the room ( C) C supply air temperature in the room ( C) HEATING COOLING In the graph are represented the following variables: D Cooling/Heating performance (W) E Power input (W) F Inner specific humidity (g/kg) G External specific humidity(g/kg) H Supply specific humidity (g/kg) I Input air flow (mch) Temperatura Aria Esterna [ C] Fresh air temperature [ C] In places where the fresh air temperature falls down -5 C for many hours a year it is recommended to use the EHPCX accessory - electric heater kit in duct. 34

35 SIZE 650 OPERATION AND PERFORMANCE CRITERIA HEATING COOLING Temperatura Aria Esterna [ C] Fresh air temperature [ C] In the graph are represented the following variables: A Performance coefficient in heating (COP) and in cooling (EER): it is the ratio between the delivered capacity and the capacity absorbed by the compressor, the auxiliary circuit and from fans considering an available pressure of 50 Pa; B Desired temperature in the room ( C) C supply air temperature in the room ( C) HEATING COOLING Fresh air temperature [ C] In the graph are represented the following variables: D Cooling/Heating performance (W) E Power input (W) F Inner specific humidity (g/kg) G External specific humidity(g/kg) H Supply specific humidity (g/kg) I Input air flow (mch) In places where the fresh air temperature falls down -5 C for many hours a year it is recommended to use the EHPCX accessory - electric heater kit in duct. 35

36 ACCESSORIES EHPCX - Kit of modulating pre-heating electric heaters in duct for fresh air low temperatures In places where the fresh air temperature falls down 5 C for many hours per year it is recommended to use the electric heaters in duct. The standard unit, to maintain an adequate level of comfort in the rooms, at low temperatures, operates in modulation of inlet air flow. With this kit is no more necessary the air flow modulation and therefore it does not penalize the air renewal in the rooms. The resistance is equipped with an electronic control to modulate the capacity depending on the outside temperature variations to maintain a correct supply air temperature. Consumptions are at minimum necessary. (AE) FRESH AIR INLET (ES) EXHAUST AIR (M) AMBIENT AIR SUPPLY (R) AMBIENT AIR RETURN SEPARATELY SUPPLIED ACCESSORIES Install the resistances (A) on the fresh air return. Install an air filter upstream (B). This should be at least a G2 class filter to protect the heating elements (provided by the customer) L = 1,5 mt max. distance between resistances and electrical panel. PSAE - Differential pressure switch for dirty air filters It allows to detect and signal (by an appropriate warning) the reaching of the max. level of air filter fouling. The unit handler receives an indication when to perform the necessary maintenance of the filters. The detecting device is installed in the unit and it is already connected to the unit electrical panel and pre-calibrated in the factory. The calibration can be modified by the qualified assistance centre during the start-up. This device is not applicable to the electronic air filter option, already equipped with the integrated fouling signalling and therefore not compatible with the differential pressure switch. CONFIGURATION DETAIL CDPX- Condensate discharge pump Centrifugal condensate discharge pump that guarantees an optimal condensate down flow every time it is not possible to have a proper down flow by gravity. The capacity is 7 litres per hour, with a prevalence of 6 meters. The packaged structure includes a floating chambre with two levels of operation: the first level starts up itself the pump while the second level is a safety level, that intervenes in case of difficulty of the pump in the down flow stopping the unit. The pump is assembled outside in sizes 70 and 120 and inside in sizes SEPARATELY SUPPLIED ACCESSORY Condensate discharge pump 36

37 FES /FESX - Electronic air filter The filter is made up of an electronic cell with filtering capacity no lower than H10 specifically suitable against fine dust, microbe loads and allergenic elements. The cell is easily accessible for cleaning from both underneath and the side through special doors. The cell is equipped with an integrated control electronic card and it can also be supplied as an accessory delivered separately, replacing the standard air filter G3. CONFIGURATION DETAIL FAEX - Kit of exhaust air filter The filter is positioned on the ambient air inlet and it allows the compressor and exhaust coil to protect from the clogging when there are no filters on the return grilles. This option is available only for sizes from 200 to 650, since there is an exhaust air filter standard assembled inside the unit in sizes (AE) FRESH AIR INLET (ES) EXHAUST AIR (M) AMBIENT AIR SUPPLY (R) AMBIENT AIR RETURN SEPARATELY SUPPLIED ACCESSORY HSE3LX - DN200 Immersed electrode humidifier (size ) HSE3MX - DN250 Immersed electrode humidifier (size ) For the ambient air humidifcation it is possible to mount in the outlet duct a humidifier with steam distributor. The regulation of steam production, realized from the electronic of Elfofresh 2 unit, can be modulated according to setpoint and relative humidity from the ambient thermostat probe (necessary in presence of humidifier). The humidifer is equipped with power supply and water inlet/outlet and it needs only the replacemnet of the cylinder boiler when the limestone deposits exceed the available limits. They are available in two versions, always with maximum production of 3 kg / h: DN 200 with the nozzle of 200 mm for the and DN250 with nozzle 250mm for sizes Steam distribution (AE) FRESH AIR INLET (ES) EXHAUST AIR (M) AMBIENT AIR SUPPLY (R) AMBIENT AIR RETURN Steam production In the event of limited space, the steam production module can be separated from the steam distribution module and installed in another position, for example, wall-mounted, up to 4 meters away. The steam tube rising segment must maintain a gradient no lower than 20. SEPARATELY SUPPLIED ACCESSORY 37

38 PROJECT CRITERIA FOR THE ELFOFresh Air SYSTEM ELFOFresh Air is the aeraulic distribution system that Clivet designed to complete their range of fresh air solutions with active thermodynamic recovery. Drawing up a project and building the aeraulic distribution system correctly is a fundamental premise to benefitting fully from the fresh air produced by with thermodynamic recovery. Incorrect choices in defining the parts and their positions can jeopardise the level of comfort in the house and even jeopardise the correct operation of the unit itself. The ELFOFresh Air system is the means through which provides fresh air inside houses, to guarantee the perfect operation of the distribution system ELFOFresh Air was designed to offer complete compatibility with all of the units using the least possible number of elements to offer a complete solution that is simple to select and install at the same time. The ELFOFresh Air system must satisfy the following criteria: reduce the air speed: high air speed in the ducting can cause noise, in order to avoid this from happening it is advisable to maintain the air speed below 3 m/s in order to ensure to total absence of noise, even at night, at a time when background ambient noises are particularly low. low pressure drops: the lower the drops in pressure, the lower the energy consumption for ventilation. In the lay-out project for the ducts it is also advisable to take into account the following solutions: it is necessary to try and reduce their extension as much as possible, as well as the use of parts such as curves, which increase drops in pressure; plan to install the correct return filter accessory (FAEX) in sizes from 200 to 650 to avoid dust and other forms of dirt from fouling the recovery heat exchanger To select the parts of the system correctly simply follow the check list below step by step: 1. Positioning the unit. 2. Positioning the fresh air intake/exhaust outlets 3. Defining the fresh air ducting 4. Defining the supply/extraction outlets and dumpers 5. Defining the distribution in the venue 6. Checking the drops in pressure in the system 1) POSITIONING THE UNIT The active thermodynamic recovery of can be set up anywhere inside the house, nevertheless it is preferable to opt for installation in utility rooms, laundry rooms or bath anterooms. It is not advisable to install it in bedrooms and adjacent rooms, as the reduction in background noise at night, even with extremely quiet units such as, could diminish the quality of sleep. It is advisable to install it near the fresh air outlets in order to reduce the length of the relative ducts and in a position that is central to all of the rooms provided with ventilation. 2) POSITIONING THE FRESH AIR INTAKE/EXHAUST OUTLETS The fresh air intake must be positioned in a zone where the concentration of impurities (dirt, odours, exhaust, etc..) in the air is low enough, not too close to the ground to protect it from dust and other volatile impurities that could be sucked up by. The air exhaust outlet must be positioned outside the house avoiding areas that are against the wind and must be placed away from terraces, balconies, bordering properties. The intake and exhaust outlets must be positioned at a minimum distance of at least 2 meters from each other to avoid the "short-circuit" phenomena between the two air flows. If possible, it is a good idea to arrange them on two different sides of the house (Ex.: a wall-mounted air intake with dumper and roof mounted exhaust fan). When it is not possible to observe these indications it is nevertheless possible to install the dumpers close to each other taking care to orient the outlets so that the two air flows travel in opposite directions. 38

39 3) DEFINITION OF THE FRESH AIR DUCTS The ELFOFresh Air system uses flexible insulated tubes to channel fresh air to and from, with a diameter of 150mm for sizes , with a diameter of 200mm for sizes and a diameter of 250mm for sizes In order to reduce the drops in pressure it is good practice to try and reduce the extension of the ducts and the number of curves to a minimum in the project., thanks to the anti-intrusion dumpers on the fresh air outlets, the metal pre-filter and the efficient filtering section, does not require the installation of additional filters on the fresh air intake duct. 4) DEFINITION OF THE SUPPLY/EXTRACTION OUTLETS AND DUMPERS To ensure the correct cleaning of the rooms, it is necessary to first of all position the supply and return outlets taking into account that the fresh air supplies are arranged in the noble rooms, the extraction of exhausted air is carried out in service rooms and that the outlets need to be installed preferably on the wall opposite the door (or the transit area). Air extraction must always be carried out from high up, by positioning one or more return outlets in all rooms that have a greater presence of humidity and polluting agents. This category includes the following rooms: kitchen, bathroom, laundry room, pantries; other rooms that may require return outlets are large walk-in closets and mezzanines where the phenomena of air stratification generally occurs. The return air must be preferably brought in from a low height (on the floor or on the wall, at the height of the Supply from below electrical sockets) in all of the rooms that are used for prolonged periods of time, i.e. the noble rooms. The rooms that make up this category are: the living room, the bedrooms and studies. In each of these rooms it is essential to set up one or more outlets to bring in fresh air. If the furnishing of the room is not known in advance, or if nevertheless it is impossible to position the supply outlets down low, it is in any case possible to use the supply outlets for correct cleaning by having the Supply from above fresh air coming in from up high. The ELFOFresh Air system uses a circular outlet for extraction, designed especially for wall/ceiling installation. For air supply it can be installed on the wall and on the floor using supply outlets that are resistant to foot-traffic, whereas air supply installed up high can be set up using the circular supply outlet. Note: It is of fundamental importance that you make sure that there are no objects in front of the outlets/grilles (pieces of furniture, wardrobes, etc..) that could interfere with the normal air circulation in the rooms. The supply air flows (extraction) must therefore be determined for each single room, in the following manner: the fresh air supply rate (extraction) is determined as a ratio between the total volume of the rooms where the supply is carried out (extraction) and the rated air flow of, and is multiplied by the volume of the room. Based on the air flow of each room you can determine the number of outlets/grilles required for each one, considering that the maximum air flow allowed for each single outlet is 50 m 3 /h (Ex.: for a room requiring an extraction of 57.1 m 3 /h it is necessary to set up 2 extraction outlets). SUPPLY GRILLE SUPPLY OUTLET VENT Note: It is good practice to make sure the rooms are set up with a fresh air flow of at least 20 m 3 /h per person. EXTRACTION OUTLET VENT 39

40 5) DEFINITION OF THE AMBIENT DISTRIBUTION The air distribution in ELFOFresh is a "manifold" type of system, and is therefore comprised of one or more distribution boxes (manifolds) with flexible ducts "attached" to it to supply the outlets/ dumpers of the ventilation system. This type of solution offers 2 great advantages: distribution is practically self-balanced regardless of the sizing of the cross-section of the tubes The available distribution boxes are two : the first one has 6 fittings with max air flow of 150 m 3 /h (max 25 m 3 /h for each fitting) and rhe second one has 12 fittings with a max air flow of 300 m 3 /h (max 25 m 3 /h for each fitting). This means that by using the ELFOFresh2 unit size it is possible to use only 2 boxes of 150 m 3 /h (1 for supply and 1 for extraction), using sizes will be used 2 boxes of 300 m 3 /h (1 for supply and 1 for extraction), while with sizes it is necessary to use at least 4 boxes of 300 m 3 /h (2 for supply and 2 for extraction). To ensure optimally balanced distribution, it is preferable to install the distribution boxes in a central position with respect to the outlets that supply them (see the figure to the side). With each box are provided the air flow controllers for each fitting, which must be installed with each flexible duct attached to the box. The controller is a small plastic DISTRIBUZIONE BILANCIATA diaphragm fitted with four removable rings to control the required volume of air. The number of rings that need to be removed is determined by the ELFOFresh Air Configurator selection software. The flat flexible ducts used by the ELFOFresh Air system are suitable up to a maximum air flow of 25m 3 /h. For greater air flow it is necessary to use two ducts on the same line. As each outlet/grille can be supplied by 1 or 2 ducts for a maximum air flow of 50 m 3 /h, the number of flexible tubes that needs to be used is determined by the air flow of each outlet (1 duct for outlets with an air flow of up to 25m 3 /h and 2 for those with an air flow of up to 50 RADIANT IMPIANTO HEATING RADIANTE m 3 SYSTEM /h). The length of each duct is established based on the route that connects the box to the outlet. If the route from the distribution box to TUBI PIPE the outlet requires sharp changes in direction, it is necessary to use IMPIANTO SYSTEM PAVIMENTO FLOOR one or more moulded curves. Given that pressure drops for each curve VENTILATION CONDOTTO VENTILAZIONE DUCT are equal to that of approximately 3 metres of tubing, it is good practice SOLAIO to avoid using them whenever possible. The flexible ducts in the ELFOFresh Air system are resistant to foot traffic and suitable for under MASSETTO LIGHTENED ALLEGGERITO SCREED floor installation (see figure to the side) in the screed under the radiant circuits. If it is not possible to install them in this manner, the reduced overall dimensions of the ducts makes them suitable for installation in false ceilings or attics. 6) CHECKING PRESSURE DROPS IN THE SYSTEM SUPPLY SECTION EXHAUST SECTION Once the layout for distribution has been determined it is Return external Exhaust air outlet vent necessary to make sure that the pressure drops in the supply and extraction sections do not exceed the maximum air outlet vent Return external Exhaust air duct air duct available pressure of the ELFOFresh2 fresh air unit. Duct to This verification of the distribution system must take into distribution box Ducts from distribution consideration all of the elements that cause drops in pressure. Fresh air ducts and Extraction ducts and or the supply section: fresh air intake dumper, fresh air ducts, preheating resistance (only if included), ducts leading to the distribution box, humidifier (only if included), air flow Intake outlet vents return outlet vents controllers, flexible extraction ducts and supply outlets/grilles. For the extraction section: fresh air exhaust dumper, fresh air ducts, return air filter (if included), ducts towards the distribution box, air flow controllers, flexible extraction ducts and extraction outlets. Note: the use of the electrostatic FES filter in place of the standard folded FAS filter allows you to reduce the pressure drops in the supply section by up to 11 Pa and therefore save energy on ventilation. 40

41 The pressure drops of every single element varies according to the air flow. The pressure drops of the ducts also changes in according to the length of the duct. In the next «accessory section» are shown the pressure drops of each element of the system ELFOFresh Air. Since ELFOFresh Air, a system of distribution manifolds, the analysis of total pressure drops is greatly simplified. The pressure drops that the must win downstream of each box of distribution coincide with the loss of load higher among all those of the individual ducts to it connected. It is therefore sufficient to identify the inlet and extraction duct characterized by loss of load higher (Normally it is the duct more extended or the one with the greatest number of curves) The drop in pressure in the supply/extraction section is therefore equal to the sum of the drops in pressure of its parts (outlets, ducts), considering the duct with the greatest drop in pressure for the supply/extraction ducts. If the total drop in pressure of the single sections is greater than the maximum available pressure, the distribution layout will need to be revised in order to fall within this limit. To reduce excessive drops in pressure it is possible to adopt one or more of the following strategies: Reducing the air flow of the ducts: it is possible to divide the duct into two (Ex.: instead of using 1 flat duct with an air flow of 24 m 3 /h it is possible to use 2 flat parallel ducts, each of which has an air flow of only 12 m 3 /h) Reducing the width of the ducts: the drops in pressure of the ducts increase as the linear length of the ducts increases. Therefore, during the project phase and within the limits set by the house, it is desirable to always minimise the lengths of each section of ducting. Reducing the number of curves in the ducts: each curve introduces a drop in pressure in the aeraulic distribution comparable to that of approximately 3 metres of ducting. If possible, it is always therefore preferable to choose solutions with wide curve radii so as to reduce the number of moulded curves required. ELFOFresh Air Configurator SELECTION SOFTWARE Sizing and checking the ELFOFresh Air system are operations that, if performed manually, require an excellent knowledge of fluid dynamics. ELFOFresh Air Configurator is an essential work tool that Clivet has put at the disposal of all professionals in order to make these operations simple, quick and absolutely reliable. It only requires a small amount of data regarding the house and the ELFOFresh Air distribution and the software will automatically and rapidly: Calculate the drops in pressure on both sections; Perform the sizing of the air flow controllers for each duct; Generate a complete bill of materials for the ELFOFresh Air system. 41

42 EXAMPLES OF AIR DISTRIBUTION Let us use the above application example used for the sizing of the ELFOFresh2 unit, to carry out the sizing of the ELFOFresh Air system. Room Surface Height Volume of main rooms volume of service rooms Supply air quantity Return air quantity m 2 m m 3 m 3 m 3 /h m 3 /h 1 Kitchen 24 64,8 72,7 2 Corridor 13 35,1 39,4 3 Bathroom 15 40,5 45,5 4 Bedroom 12 32,4 21,1 5 Bedroom 13 2,7 35,1 22,8 6 Bedroom 25 67,5 43,9 7 Bathroom 14 37,8 42,4 8 Study room 14 37,8 24,6 9 Livingroom ,7 TOTAL ,8 178, Air renewals (Vol/h) 0,65 1,12 Having already defined the necessary supply and return air flow for each room to achieve the correct amount for fresh air, based on the previously illustrated sizing rules, the number of outlets required for each room is determined: number of outlet vents, room = Air flow, room / Max air flow, outlet vents, followed by the number of ducts for each room number ducts, room = Air flow, room / Max air flow, duct. Taking into consideration the kitchen, for example (room 1) we obtain: number outlet vents, kitchen = Air flow, kitchen / Max air flow, duct = 72.7 / 50 = 1.45 > 2 outlets number ducts, kitchen = Air flow, kitchen / Max air flow, duct = 72.7 / 25 = 2.91 > 3 outlets The analysis must therefore be repeated for all of the rooms in the house where at least one outlet vent is installed In the drawing above are highlighted ducts and outlets necessary for the system ELFOFresh Air. Section Delivery: 6 jets and 9 flexible ducts Section of expulsion: 5 and 9 vents flexible ducts 42

43 Once the distribution layout has been defined, proceed with checking the total drops in pressure of the unit, for both the supply and the exhaust section. In the accessories section below, the pressure drops are provided for the parts of the system based on the air flow. In order to proceed with an analysis of the whole distribution it is necessary to check every component for its relative pressure drop. The selection software checks the pressure drops automatically, thus reducing the possibility of making mistakes and the time required for sizing to a minimum, and checks the project. Below they are the verification details of the application example proposed. Supply section Extraction section Exhausted air exhaust outlet: the wall-mounted terminal with a rated air flow of 200 m 3/ h leads to a pressure drop of 11 Pa. Fresh air exhaust duct: 2 meters of 200 mm flexible duct with an air flow of 200 m 3 /h have a pressure drop of 0.5 Pa.for a total of 1 Pa. Ducts from the distribution box: 3 meters of 200 mm flexible duct with an air flow of 200 m 3 /h have a pressure drop of 1,5 Pa. Extraction ducts and relative intake outlet vents: the duct with the greatest pressure drops is the one that intake fesh air in the badroom (room 5) with an air flow of approximately 23 m 3 /h. It is composed of a fully open air flow controller (0.7 Pa), 12 meters of flexible duct (25 Pa) a vertical curve (2Pa) and a supplì grille (2,6 Pa) for a total of 30.3 Pa. The supply section is therefore characterised by a pressure drop of = 43.8 Pa Extraction section exhaust outlet vent : the wall-mounted terminal with a rated air flow of 200 m 3 /h leads to a pressure drop of 11 Pa. Fresh air exhaust duct: 5 meters of 200 mm flexible duct with an air flow of 200 m 3 /h have a pressure drop of 2.5 Pa. Ducts from the distribution box: 2 meters of 200 mm flexible duct with an air flow of 200 m3/h have a pressure drop of 1 Pa Extraction ducts and relative intake grilles: the duct with the greatest pressure drops is the one that extracts air from the top left hand corner of the Kitchen (room 1) with an air flow of approximately 48 m 3 /h. It is composed of a fully open air flow controller (0.7 Pa), 8 meters of flexible duct (16 Pa) and an extraction outlet (25 pa) for a total of 41.7 Pa. The extraction section is therefore characterised by a pressure drop of = 56.2 Pa The pressure drops for both of the supply and extraction sections are less than the maximum available pressure of the unit (120 Pa). The distribution defined in this way is therefore correctly sized to be used with the selected 200. Based on the calculated pressure drops it is also possible to define the settings for the parameters of the fans that need to be used when the unit starts (for more details please refer to the operating and maintenance manual). Fan parameters Pressure drops [Pa] LOW HEAD 40 MEDIUM HEAD 80 HIGH HEAD 120 In the example in question it is necessary to set: the LOW HEAD setting for the supply fan. the MEDIUM HEAD setting for the return fan. 43

44 AIR DISTRIBUTION EXAMPLES Here are two typical examples of ELFOFresh² air distribution depending on the size of the unit Air distribution with 1 box input and 1 box of fresh air for the extraction of the air from the room Air distribution with 2 box input and 2 box of fresh air for the extraction of the air from the room. 44

45 ELFOFresh Air COMPATIBILITY OPTIONS RIF. DESCRIPTION FLEXIBLE FLAT SYSTEM TFPSX Flat hose 50x100mm in 50m reel insulation ISO26X Insulation for flat hose (13 pieces of 2m for a total of 26m) ANFX ADVX ANTX CV90X CO90X TAPX GIUNX ADGPX CONBDX REGPX Fixing loop for plate hose Valve adapter Seal ring for flat hose Vertical 90 curve for flat hose Horizontal 90 curve for flat hose Closure plug Joint for flat hose Adapter for level grid Connector for distribution box Flow controller BD6CX Distribution box with 6 connections - - BD12CX GRIVEX GRINOX VESTX VIMMX Distribution box with 12 connections Painted metal grid RAL9010 for wall/floor Stainless steel grid for wall/floor DN125 ABS Extraction valve DN125 ABS intake valve INPUT / OUTPUT SYSTEM - GR 150X Exhaust / return square wall grille with circular coupling DN GR200X Exhaust / return square wall grille with circular coupling DN200 - GR250X Exhaust / return square wall grille with circular coupling DN250 - TFI150X Insulated hose DN150 (length 6m) - - TFI200X Insulated hose DN200 (length 6m) TFI250X Insulated hose DN250 (length 6m) - DY200X DN200-DN200-DN200 Y-joint - DY250X DN250-DN200-DN200 Y-joint - R2520X DN250-DN200 Reducer GF150X F/F DN150 Joint - - GF200X F/F DN200 Joint GF250X F/F DN250 Joint Separately supplied accessory * Air ELFOFresh kit consists of a single package containing selected codes 45

46 ELFOFRESH AIR AERAULIC DISTRIBUTION ACCESSORIES - SEPARATELY SUPPLIED ACCESSORY TFPSX - Flat hose 50x100 mm in 50 without insulation ISO26X - Insulation for flat hose (13 pieces of 2m for a total of 26m) The delivery of air to the outlets or intake grids and the extraction of air from the return outlets is realised through an appropriate semi-oval shaped hose with a flat base and with reduced overall size (50 mm), internally covered with antibacterial and antistatic material. It can be cut with a simple cutting utensil and may be connected without special equipment to all other system components. The flexible duct is suitable for a nominal air capacity of 25 m³/h. To channel greater quantities of air to a grid or to a valve it is necessary to use two flexible ducts. The adapter for the grid and the valve adapter are already equipped with a double inlet. It is necessary to always install the flexible duct with the flat side towards the wall or floor. The flexible piping allows a minimum vertical curve radius of 200 mm and minimum horizontal curve radius of 400 mm. The hose is supplied in 50 m reels with the 9 mm anti-condensate insulation which must be applied before the layout of the ducts. The anti-condensate thermal insulation is supplied in two packs of 26m, made up of 13 pieces of 2m each one, for each coil of 50m. ANFX - Fixing loop for plate hose The hose can be blocked to the wall through an appropriate fixing loop made up of two parts: the first is for vertical anchorage, horizontal or to the ceiling, the second is for blockage of the flexible duct. It is possible to connect more fixing loops side by side while guaranteeing the same track of the distribution box sleeves, valve or flat grid adapters CO90X - Horizontal 90 curve for flat hose The flat hoses may be bent horizontally with a minimum curve radius of 400 mm. In case it is necessary to make a horizontal curve with a smaller radius, horizontal curves may be used moulded at 90. It is possible to set the flexible duct exclusively through use of the sealing loops on both sides of the curves CV90X - Vertical 90 curve for flat hose The flat hoses may be bent vertically with a minimum curve radius of 200 mm. In case it is necessary to make a horizontal curve with a smaller radius, 90 vertically moulded curves may be used. It is possible to set the flexible duct exclusively through the use of sealing rings on both sides of the curve ANTX - Seal ring for flat hose To unlock the flat hose to any other system element and ensure air sealing it is necessary to use quick-setting sealing loops. Therefore to connect the flat hose to the box of distribution, to the adapters for valves and grids, to the joints and the horizontal and vertical curves, one must always use this part. 46

47 GIUNX - Joint for flat hose The connection between two pieces of flat hose must be carried out through the appropriate joint. The connection is made on both sides of the joint with the use of 2 sealing rings. 61 REGPX - Flow controller 118 To be able to adjust the quantity of air conveyed to a grid or to an intake/extraction grid it is necessary to install the flow regulation device (removable loop diaphragm). It is blocked on the sealing sing and set together with the flexible duct in the distribution box sleeves. The capacity regulator is equipped with four removable loops to adjust the necessary air volume. The number of rings to remove is determined automatically by the ELFOFresh Air Configurator selection software. TAPX - Closure plug The plug may be applied to the inlet/outlet not used by the distribution box, to the valve adapters and flat grids. To mount the plug, no sealing loop is necessary. BD6CX - Distribution box with 6 connections, 3 plugs and 6 flow regulation devices BD12CX - Distribution box with 12 connections, 6 plugs and 12 flow regulation devices To be able to distribute air to the intake grids and to the valves and collect 12 CONNECTION BOX DISTRIBUTION the air coming from the extraction grids and valves, it is necessary a box through which one may interconnect the insulated flexible piping (DN150, DN200 and DN250) from the Elfofresh2 with the various 50x100m flat hoses. The distribution box (identical for introduction and extraction air) is equipped with 6 or 12 input/output sleeves. For each input/output outlet, maximum air capacity is 25 m³/h=, therefore with a single 6 connection distribution box the maximum permitted air capacity is 150 m³/h while for a 12 connection distribution box is of 300 m³/h ; therefore for the Elfofresh sizes is sufficient a 6 connection box, one intake and one in extraction, for the for the Elfofresh sizes, a 12 connection box, one intake and one extraction while INSULATING TAPE for the Elfofresh sizes at least two boxes with 12 connections in intake and two in extraction. The inside of the box is covered with sound-insulating material, while the structure is made of 1 mm thick galvanised sheet metal, externally coated with 5 mm anti-condensate material. The box may be installed in horizontal or vertical position and also has the possibility to mount the nozzle of 200 mm both at the back or at the side based on necessity (removing 8 screws and inverting the position). The package includes 6 plugs, 12 capacity regulators and one 10 m roll of adhesive insulating tape. The anti-condensate material insulating tape must be used to cover joints, reductions and brunchs. 12 CONN. BOX WITH SIDE NOZZLE 12 CONN. BOX WITH BACK NOZZLE

48 ADVX - Valve adapter Allows to connect the extraction and intake valves to the air distribution system. It is equipped with two air inlets for a maximum capacity of 50 m³/h. If the air capacity crossing the valve is less than 25 m³/h, one single inlet is sufficient and the other will have to be closed with the appropriate plug for closure, equipped with each adapter. If the air capacity crossing the valve is included between 25 and 50 m³/h, it is necessary to connect a second hose. If necessary it is possible to shorten the cylinder trunk to a desired size with a cutting utensil, to ease this operation the trunk shows referential markings. The valve adapter is equipped with a white circular plug which may be used during distribution system installation to prevent incoming dust and dirt inside the hoses O 135 VESTX - DN125 ABS Extraction valve Extraction of the air from the environment may be carried out on the wall or ceiling with this valve, for a maximum capacity of 50 m³/h. The valve is suitable for humid environments, the valve body is plastic (ABS), and for simple installation, the valve has been equipped with three stainless steel hook springs. The valve cone may be adjusted in various steps. O 125 VIMMX - DN125 ABS Intake valve The air intake in the environment may be carried out on the wall or on the ceiling with this valve up to a maximum capacity of 50 m³/h. The introduction valve was designed to avoid recirculation phenomena which may leave dirt on the installation surface. To facilitate assembly it has been equipped with three stainless steel hook springs and one rubber fixing loop. The intake valve may be adjusted with an internal screw. O 125 ADGPX - Adapter for level grille To connect the flat 350 x 130 mm grid to the air distribution system. If the outlet air capacity is less than 25 m³/h, a single inlet is sufficient and the other one must be closed with the appropriate supplied closing plug. If the outlet air capacity is included between 25 and 50 m³/h, it is necessary to connect a second hose. If the available space for the adapter is not sufficient, it is possible to shorten its height with a cutting utensil. On the back part there are two eyelets for fixing. The grid adapter is supplied with a white rectangular plug which may be used during installation of the distribution system to prevent the incoming dust and dirt inside the hoses

49 GRIVEX - Painted metal grid RAL9010 for wall/floor GRINOX - Stainless steel grid for wall/floor Serves to diffuse air to the wall or floor up to a maximum capacity of 50 m³/h and must be coupled with the adapter for flat grid. The metallic grid may be walked on and is available in two versions: stainless steel or painted white. The grid is fixed with two springs on the adapter TFI150X - Insulated hose DN150 (length 6m) TFI200X - Insulated hose DN200 (length 6m) TFI250X : Insulated hose DN250 (length 6m) To connect ELFOFresh2 to the air distribution boxes and the return and expulsion grids an insulated flexible piping is used which allows ample installation flexibility, effective noise reduction and avoids condensation occurrences. The flexibility allowed by the reduced pitch spiral allows for 180 curves without crushing. Two diameters are available: - DN150 for sizes - DN200 for sizes - DN250 for sizes Technical data of the pipe used: - internal wall in reticular antibacterial Polyester PVC-spread material on both sides. - the internal armour of the hose is made up of a harmonious steel wire spiral with reduced pitch, incorporated by two thermal-sealed PVC layers. - insulation spread polyester fibre 30 mm. and d. 17 Kg/m³ - external coating on Polyolefin resin coat - FIRE-PROOF class 1 (I) GR150X - Exhaust / return square wall grille with circular coupling DN150 GR200X - Exhaust / return square wall grille with circular coupling DN200 GR250X - Exhaust / return square wall grille with circular coupling DN250 Fresh air return and expulsion may be carried out on the wall by reaching this expulsion/return grid with the insulated hose. There are two available grids: - DN150 for sizes - DN200 for sizes - DN250 for sizes The grid is square and equipped with slits for installation on external walls, and may be used both in supply and in return. It is equipped with a circular back connection with sealing washer and anti-volatile netting. A A B O 6 Dimension grid A [mm] B [mm] C [mm] Weight [kg] B

50 DY200X - DN200-DN200-DN200 Y-joint DY250X - DN250-DN200-DN200 Y-joint In the sizes ELFOFresh two air distribution in intake boxes are used and two in extraction, for which it is necessary to separate the DN250 flexible piping coming from the ELFOFresh2 in two DN200 pipes. The Y junction with DN250-DN200-DN angle allows this separation in two. If instead I need to bring air to distant locations, I can have more distribution boxes also with sizes ELFOFresh , and in this case it is necessary to use the Y junction DN200-DN200- DN200. O B L The junction is realised with galvanised sheet metal, the connections are male and equipped with sealing washers. 45 O A A mm B mm B mm L mm Weight kg O B R2520X - DN250-DN200 Reducer There are some cases in which it is necessary to switch from a DN250 diameter to a DN200 diameter. The preheating electrical resistance kit has a diameter of DN 200 for which, to be able to connect it to the ELFOFresh requires this reduction plus joint F/F 200. The reduction is realised in moulded galvanised sheet metal female-male, with 45 angle for installations, with reduced overall dimensions, reduced pressure drops and low noise F mm M mm L mm Weight kg O M O F GF150X - F/F DN150 Joint GF200X - F/F DN200 Joint GF250X - F/F DN250 Joint Joint to use to connect to the unit the pieces of DN200 and DN250 insulated flexible piping and components such as humidifier and heaters. L F mm L mm Weight kg O F

51 TABLE OF FLEXIBLE FLAT PRESSURE DROPS Air flow in m3/h Pressure drop in Pa Flat hose L = 1000 mm 0,1 0,3 0,8 1,3 2, Vertical 90 curve 0,1 0,3 0,7 1,2 1, Horizontal 90 curve 0,1 0,4 0,9 1,5 2, Adapter complete with grid 0,1 0,4 0,9 1,7 2,6 3,3 3,8 4,3 5,4 6,7 Intake valve with adapter (opening 100%) 0,2 0,9 2,1 3,8 5,9 8,5 9,0 11,8 14,8 18,4 Extraction valve with adapter (opening 100%) 0,6 2,2 5,0 8,9 13,9 15, ,9 25,2 31,1 Flow regulation device with all the loops 2,4 9,5 21,3 37,8 59, Flow regulation device without 1 loop 0,6 2,5 5,7 10,1 15, Flow regulation device without 2 loop 0,2 0,7 1,7 3,0 4, Flow regulation device without 3 loop 0,1 0,2 0,5 0,9 1, Flow regulation device without 4 loop 0 0,1 0,3 0,4 0, TABLE OF INPUT AND OUTPUT PIPING PRESSURE DROPS Air flow in m3/h Pressure drop in Pa Insulated hose DN150 L = 1000 mm 0,1 0,3 0,5 0,7 1,0 1,9 2,5 3, Insulated hose DN150 curve at 90 r=150mm - 0,1 0,2 0,8 1,8 2,9 4,7 6, Insulated hose DN200 L = 1000 mm ,2 0,4 0,6 0,9 1,2 1,5 1,8 2,2 2, Insulated hose DN200 curve at 90 r=200mm ,1 0,8 1,2 2,4 2,9 3,8 4,9 6,0 7, Insulated hose DN250 L = 1000 mm ,1 0,2 0,3 0,4 0,4 0,5 0,6 0,8 1,0 1,2 1,3 1,4 1,5 Insulated hose DN250 curve at 90 r=250mm ,1 0,5 1,0 1,7 2,0 2,5 2,8 3,4 3,9 4,8 5,1 6,1 DN250-DN200 reducer ,1 0,3 0,5 0,6 0,8 0,9 1,3 1,5 1,8 2,0 2,4 2,7 3,0 3,3 Wall return grid DN150 1,2 2,4 4,2 5,9 9,1 16, Wall return grid DN ,6 6,3 9,9 14,8 19,1 25,2 32,5 39,9 49, Wall return grid DN ,5 2,5 4,2 6,2 8,2 11,1 13,5 17,2 22,3 24,9 29,8 34,4 39,8 45,1 Wall exhaust grid DN150 0,8 1,7 3,3 4,7 7,1 13, Wall exhaust grid DN ,8 5,2 8,3 12,5 17,1 22,4 26,7 34,9 39, Wall exhaust grid DN ,4 1,6 3,3 4,7 6,6 8,5 10,9 13,8 16,7 19,1 22,2 26,4 30,1 34,8 51

52 15 15 DIMENSIONAL DRAWINGS SIZES Dimensional drawing nr Length mm Depth mm Height mm DIMENSIONAL DRAWING M R ** ** 500 AE ES ** 20 M R ** AE 4 ES O ** ** ** (A) ** ** MIN. SPACE FOR MAINTENANCE A(20) : only for ceiling installation (1) REMOVABLE PANEL FOR LOWER ACCESS TO THE EXHAUST AIR FILTER (2) REMOVABLE PANEL FOR LOWER ACCESS TO THE ELECTRICAL PANEL (3) REMOVABLE PANEL FOR LOWER ACCESS TO THE TREATMENT AIR FILTER (4) REMOVABLE PANEL FOR LOWER ACCESS TO THE FRESH AIR FILTER (5) REMOVABLE PANEL FOR LATERAL ACCESS TO THE ELCTRICAL PANEL (6) CONDENSATE DISCHARGE PIPE (7) REMOVABLE PANEL FOR ACCESS TO CUSTOMER TERMINAL BLOCK (8) FIXING POINTS (AE) FRESH AIR RETURN (ES) AIR EXHAUST (M) AMBIENT AIR SUPPLY (R) AMBIENT AIR RETURN 52

53 DIMENSIONAL DRAWINGS DIMENSIONAL DRAWING M R AE ES ** min 20 ** O 200 ** **(A) min: a) - ceiling installation, filter access from below, electrical panel that can be controlled remotely at a distance of at least 200 ** min ** AE M ES R ** 20 b) -ceiling installation, filter access from below, electrical panel that cannot be controlled remotely, minimum distance of 700 c) -floor installation, lateral filter access, electrical panel that can be controlled remotely at a distance of at least 400 d) -floor installation, lateral filter access, electrical panel that cannot be controlled remotely, minimum distance ** ** MIN. SPACE FOR MAINTENANCE A(20) : only for ceiling installation (1) REMOVABLE PANEL FOR ACCESS TO COMPONENTS OF TREATMENT SECTION (2) REMOVABLE PANEL FOR ACCESS TO COMPONENTS OF RECOVERY SECTION (3) REMOVABLE PANEL FOR LOWER ACCESS TO THE AIR FILTER (4) ELECTRICAL PANEL (5) FIXING POINTS (6) POWER INPUT (7) CONDENSATE DISCHARGE PIPE (8) REMOVABLE PANEL FOR LATERAL ACCESS TO THE AIR FILTER (AE) FRESH AIR RETURN (ES) AIR EXHAUST (M) AMBIENT AIR SUPPLY (R) AMBIENT AIR RETURN Size A - Length mm B - Depth mm C - Height mm Length mm Depth mm Height mm Operating weight kg Shipping weight kg

54 DIMENSIONAL DRAWINGS DIMENSIONAL DRAWING M R AE ES ** min 20 O ** ** 20 7 ** (A) ** min ** 300 ** 300 AE M ES R min: a) - ceiling installation, filter access from below, electrical panel that can be controlled remotely at a distance of at least 200 b) -ceiling installation, filter access from below, electrical panel that cannot be controlled remotely, minimum distance of ** c) -floor installation, lateral filter access, electrical panel that can be controlled remotely at a distance of at least 400 d) -floor installation, lateral filter access, electrical panel that cannot be controlled remotely, minimum distance 700 ** MIN. SPACE FOR MAINTENANCE A(20) : only for ceiling installation (1) REMOVABLE PANEL FOR ACCESS TO COMPONENTS OF TREATMENT SECTION (2) REMOVABLE PANEL FOR ACCESS TO COMPONENTS OF RECOVERY SECTION (3) REMOVABLE PANEL FOR LOWER ACCESS TO THE AIR FILTER (4) ELECTRICAL PANEL (5) FIXING POINTS (6) POWER INPUT (7) CONDENSATE DISCHARGE PIPE (8) REMOVABLE PANEL FOR LATERAL ACCESS TO THE AIR FILTER (AE) FRESH AIR RETURN (ES) AIR EXHAUST (M) AMBIENT AIR SUPPLY (R) AMBIENT AIR RETURN Size A - Length mm B - Depth mm C - Height mm Length mm Depth mm Height mm Operating weight kg Shipping weight kg

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