WHISPER Enthalpy. Climaveneta Technical Bulletin. Packaged reversible Rooftop unit, air cooled, high efficiency with Enthalpic heat recovery

Transcription

1 Climaveneta Technical Bulletin WHISPER_ENTHALPY_0102_0604_201203_EN r HFC R-410A kw Packaged reversible Rooftop unit, air cooled, high efficiency with Enthalpic heat recovery (The photo of the unit is purely indicative and may vary depending on the model) High energy efficiency Variable flow-rate Thermodynamic effect Plug fans Enthalpic heat recovery

2 SUMMARY 1. : LEED RELEVANT PRODUCT p PRODUCT PRESENTATION 5 3. MAIN COMPONENTS 6 4. DESCRIPTION OF THE UNIT 9 5. STANDARD UNIT CONFIGURATIONS OPERATING MODES ACCESSORIES GENERAL TECHNICAL SPECIFICATIONS GAS-FIRED HEATING MODULE OPERATING LIMITS SOUND LEVELS DIMENSIONAL DRAWINGS 32 Company quality system certified to UNI EN ISO 9001 and environmental certification UNI EN ISO Waiver of liability This publication represents a preliminary document, and is the sole property of Climaveneta. Any reproduction or disclosure of such is strictly prohibited without the written authorisation of Climaveneta. This document has been prepared with maximum care and attention paid to the content shown. Nonetheless, Climaveneta waives all liability deriving from the use of such document. Read this document carefully. All work must be performed, components selected and materials used professionally and in complete accordance with the legislation in force in material in the country concerned, and considering the operating conditions and intended uses of the system, by qualified personnel. The data contained in this publication may be changed without prior notice. 2 WHISPER_ENTHALPY_0102_0604_201203_EN

3 : LEED RELEVANT PRODUCT The LEED protocol is the most known protocol of sustainability to define and measure green buildings all around the world. Based on existing and proven technology, it evaluates environmental performance from a whole building perspective over a building s life cycle, providing a definitive standard for what constitutes a green building in design, construction and operation. The LEED rating systems are designed for rating new and existing commercial, institutional and residential buildings. They are based on accepted energy and environmental principle and strike a balance between known, established practices and emerging concepts. Each rating system is organized into 7 environmental categories: Sustainable Sites, Water Efficiency, Energy and Atmosphere, Materials and Resources, Indoor Environmental Quality, Innovation in Design and Regional Bonus. units are compliant with the performance standard contained in the protocol of sustainability LEED. In detail, units contribute to the following points: prerequisite 2 in ENERGY & ATMOSPHERE topic units, upon check of the commercial office, are ASHRAE compliant. The Minimum Efficiency Requirements detailed in the table 6.8.1A/B of the American standard are guaranteed. TABLE 6.8.1A Electrically Operated Unitary Air Conditioners and Condensing Units Minimum Efficiency Requirements Equipment Type Size Category Heating Section Type Sub-Category or Rating Condition Minimum Efficiency a Test Procedure b 65,000 Btu/h and <135,000 Btu/h Electric Resistance (or None) All other Split System and Single Package Split System and Single Package 10.3 EER (before 1/1/2010) 11.2 EER (as of 1/1/2010) 11.4 IEER (as of 1/1/2010) 10.1 EER (before 1/1/2010) 11.0 EER (as of 1/1/2010) 11.2 IEER (as of 1/1/2010) 135,000 Btu/h and <240,000 Btu/h Electric Resistance (or None) All other Split System and Single Package Split System and Single Package 9.7 EER (before 1/1/2010) 11.0 EER (as of 1/1/2010) 11.2 IEER (as of 1/1/2010) 9.5 EER (before 1/1/2010) 10.8 EER (as of 1/1/2010) 11.0 IEER (as of 1/1/2010) Air Conditioners, Air Cooled 240,000 Btu/h and <760,000 Btu/h Electric Resistance (or None) All other Split System and Single Package Split System and Single Package 9.5 EER (before 1/1/2010) 10.0 EER (as of 1/1/2010) 9.7 IPLV (before 1/1/2010) 10.1 IEER (as of 1/1/2010) 9.3 EER (before 1/1/2010) 9.8 EER (as of 1/1/2010) 9.5 IPLV (before 1/1/2010) 9.9 IEER (as of 1/1/2010) ARI 340/ ,000 Btu/h Electric Resistance (or None) All other Split System and Single Package Split System and Single Package 9.2 EER (before 1/1/2010) 9.7 EER (as of 1/1/2010) 9.4 IPLV (before 1/1/2010) 9.8 IEER (as of 1/1/2010) 9.0 EER (before 1/1/2010) 9.5 EER (as of 1/1/2010) 9.2 IPLV (before 1/1/2010) 9.6 IEER (as of 1/1/2010) 3 WHISPER_ENTHALPY_0102_0604_201203_EN

4 prerequisite 3 in ENERGY & ATMOSPHERE topic units use the refrigerant R410A, which is compliant with the GWP limitations set by the protocol. In detail, this refrigerant isn t a (CFC)-based refrigerant as moreover prescribed by the most of the national legislation around the world. credit 1 in INDOOR ENVIRONMENTAL QUALITY topic units may be provided with a CO 2 probe to constantly monitor the indoor air quality and therefore set the optimum ventilation conditions. This characteristic, together with the measurement of the fresh air flow to be injected into the room (at customer care), is considered in the OUTDOOR AIR DELIVERY MONITORING credit, which weights for 1 point in the LEED protocol. credit 2 in INDOOR ENVIRONMENTAL QUALITY topic LEED protocol rewarded with 1 point the buildings with an air treatment plant designed to grant the maximum IAQ. In detail, if the air treatment units can assure an additional fresh air injection, a smart management of the recovery of the rejected heat for the air renewal and the capability to implement free cooling mode when convenient, 1 point can be gained. units can all be provided with these optional on request credit 5 in INDOOR ENVIRONMENTAL QUALITY topic units are available with high performing filters, F7 and electronic ones, that assure an advanced air filtration minimizing the building occupant exposure to potentially hazardous particulates and chemical pollutants. This credit INDOOR CHEMICAL AND POLLUTANT SOURCE CONTROL weights for 1 point in the scoring system credit 7 in INDOOR ENVIRONMENTAL QUALITY topic This credit implies up to 1 point for the buildings characterized by a comfortable thermal environment that promotes occupant productivity and well-being. All the units, thanks to the advanced thermoregulation logics, the adoption of well-sized humidifiers and post-heating coils, grant a precise and fine regulation of the most important variables, ensuring the highest indoor air quality Other points can be gained as indirect consequence of an high efficient air conditioning system choice. In particular: credit 1 in ENERGY & ATMOSPHERE topic units, especially the CA and CA-E versions, contribute to OPTIMIZE ENERGY PERFORMANCE of the building. As known, air-conditioning and ventilation systems are responsible for approximately a third of the total energy consumption in a modern building. The proper size and design of each component involved in comfort creation determine a relevant energy saving, prize by LEED protocol with up to 19 points. The amount of points assigned to the building depend to the percentage of energy saving calculated compared with the baseline building performance rating: 1 point for an improvement in energy performance of 12% and 19 points for energy improvement higher than 48%. The baseline building performance are defined according to Appendix G of ASHRAE standard credit 1 in INNOVATION IN DESIGN topic 5 more points can be gained by design teams and projects that achieve exceptional performance above the requirements set by the LEED Green Building Rating System and/or adopt innovative solution not specifically addressed by the LEED Green Building Rating System. All units use the thermodynamic effect of the exhaust air on the external coil, to recover the heat rejected for the air renewal and improve the working conditions of the cooling circuit. Moreover the units are all capable to operate with variable air flow according to the thermal load and are suitable to be provided with latest generation filters: these advanced design techniques could be classified as innovative and therefore contribute to achieve some points in this topic. Climaveneta is a Green Building Council Italy and actively supports the diffusion of LEED practice all around the world There are already several buildings LEED certified also tank to Climaveneta HVAC systems. For more information, browse the project reference list at GLOSSARY GWP: Global Warming Potential Index that express the contribution given by a greenhouse effect gas emission into the atmosphere. All the molecules have a potential defined in relation to the CO 2 molecule, which has a potential of 1 and acts as a reference. CFC: ChloroFluoroCarbon LCGWP: Life Cycle Global Warming Potential Index that define a threshold for the global warming potential estimated for the product life-cycle. It is a function of the following variables: - refrigerant GWP - refrigerant leakage rate and end-of-life refrigerant loss - estimated equipment life - refrigerant charge IAQ: Indoor air quality 4 WHISPER_ENTHALPY_0102_0604_201203_EN

5 2. PRODUCT PRESENTATION The rooftop units are high efficiency packaged air-to-air reverse-cycle units, for complete air temperature and humidity control. Filtration, ventilation and air renewal are guaranteed by a packaged solution that s ideal for large spaces, such as supermarkets and shopping centres. The cooling section comes as standard with two refrigerant circuits, scroll compressors, R410A refrigerant and heat exchange coils with intertwined circuits; the air handling section uses plug fans as standard for the supply and return air, thermodymanic effect of the exhaust air on the external coila nd rotary enthalpic heat recovery. Efficiency, reliability, versatility and simple maintenance are the result of precise technological decisions, meaning the WHIS- PER Enthalpy unit can ensure maximum design and operating freedom. 2.4 Simplified installation and maintenance The rooftop units simplify and reduce the costs of maintenance and work on site, through: Compact dimensions for simplified transport, handling and positioning on site, making these operations make more economical compared to traditional units. Sturdy and perfectly insulated structure that guarantees resistance to the elements and mechanical stress Easy access to the inside sections and the components that require periodical cleaning, for fast and economical routine maintenance. PLUG and PLAY construction that ensures, once the unit has been positioned, simpler and faster electrical and air connections. Automatic calibration of air flow-rates, with consequent savings in technical service and greater comfort. 2.2 Energy efficiency The units stand out in the Climaveneta range of packaged units for the choice of components and solutions aimed at energy efficiency. The AIR 3000 SE controller optimises unit operation in all conditions, through intelligent management of the devices available. High efficiency plug fans to simplify installation and maintenance operations and reduce power consumption required for ventilation; Enthalpic wheel heat recovery, making a significant contribution to overall unit performance; Heat exchange coils with intertwined circuits, to achieve greater heat transfer efficiency during operation at part load; Thermodynamic heat transfer between the exhaust air and the outdoor coil, allowing the unit to operate with more advantageous condensing temperatures Freecooling to reduce the use of the refrigerant circuit by exploiting favourable outside air conditions. 2.3 Complete range The Whisper Enthalpy range consists of thirteen sizes, available in a single configuration to satisfy all system requirements, being supplied with a complete set of standard components and a vast selection of accessories. The units use plug fans on both the air supply and return. Based on innovative control logic developed by Climaveneta, these ensure ventilation remains constant over time while reducing unit power consumption by 30%. The availability of different filtering options (mechanical or electronic) ensures the best response to the specific requirements of each installation: maximum air quality can be obtained with G3 filters combined with F7 (mechanical bag filters) or H10 (electronic filters), as required. Reversing of the refrigerant circuit and freecooling/freeheating operation allow continuous service within the wide range of operating limits, achieved through careful sizing of the components and specific design choices. 5 WHISPER_ENTHALPY_0102_0604_201203_EN

6 3. MAIN COMPONENTS 3.1 Plug fans Ventilation on all Whisper Enthalpy units is managed using plug fans with backward inclined blades. These differ from traditional centrifugal fans due to absence of the scroll and direct coupling to the motor, thus eliminating energy loss from the belt and pulley transmission. Depending on the air flow-rate, EC brushless or asynchronous motors with inverter control are used, allowing electronic speed control via a 0-10 V signal. This type of technology ensures clear advantages, with installation being simplified based on the parameters set by the user, without needing any flow-rate adjustment during calibration. In addition, fan speed adapts to the characteristics of the system even when the unit is operating, for example compensating for any variations in flow-rate due to progressive fouling of the filters. The low power consumption of these types of fans can be further reduced by applying the exclusive control logic developed by Climaveneta. All this means high operating efficiency even for the part involving the fans, traditionally a critical area in terms of running costs. 3.2 Variable flow-rate On rooftop units, that directly serve the air-conditioned environment and represent the main source of ventilation, the supply and return fans work continuously at a fixed flow-rate (constant speed), in all operating conditions, even during freecooling and at part loads, which together account for the majority of operating hours. Consequently, power consumption from fan operation on rooftop units represents over 50% of total annual unit power consumption, which is why Climaveneta decided to develop a system for controlling fans that could reduce fan power consumption. The most effective way to reduce power consumption is to decrease fan speed, and consequently flow-rate, whenever system operating conditions allow. 6 WHISPER_ENTHALPY_0102_0604_201203_EN

7 The advanced logic featured on the AIR 3000 SE controller and the use of plug fans with electronic speed control have allowed the variable flow-rate function to be developed. This involves changing the supply and return air flow-rate based on effective demand from the system, considering the activation percentage of each device - compressors, heaters or burners, freecooling or freeheating; for example, progressive shutdown of the compressors will bring a reduction in air flow-rate, defined within the limits set by the user. This means flow-rates are managed based on the actual conditions in the air-conditioned space, while still observing any limits defined on the components and the type of system. In addition to benefits in terms of comfort, there are also economic advantages, as reducing fan speed cuts total unit power consumption by 30% compared to the traditional fixed flow-rate solution. 3.3 Rotary enthalpy recovery This is the most efficient recovery system, with efficiency ranging from 60% to 90% depending on operating conditions, thanks to the exchange surface, which is very high compared to volume. The main component is the enthalpic wheel made with alternating flat and corrugated aluminium sheets. As a series of paths are created, along which renewal and discharge air flows run in opposite directions, it recovers latent heat as well as sensible heat. This makes it possible to reduce the inflow of humidity during summer operation and to reduce or even eliminate any winter humidification device, considerably increasing overall unit efficiency. The rotor is powered by a constant-speed electric motor with a very low power input. Operating principle In the rotary heat recovery, heat transfer is realized thanks to heat store in the wheel. While the wheel is slowly turning, the exhaust air flows through one half of the wheel and transfers heat at the rotor that stores it. The fresh air, which flows through the other half, absorbs the stored heat. As the wheel continues to rotate, the parts that absorb and give up the heat swap over continuously. Summer operating Winter operating EXHAU XHAU EXHAU XHAU EXHAU EXHAU FRESH AIR FRESH AIR 7 WHISPER_ENTHALPY_0102_0604_201203_EN

8 3.4 Thermodynamic effect Thermodynamic heat transfer allows efficient use of the remaining energy contained in the exhaust air, by forcing this through the outside section of the refrigerant circuit. This consequently increases unit performance, allowing operation at a condensing temperature that s more advantageous than the outside temperature, meaning lower power consumption and higher overall efficiency. 3.5 Intertwined circuits All units in the Whisper Enthalpy range feature two refrigerant circuits and heat exchange coils with intertwined circuits: both circuits run through both the indoor and outdoor coils, with pipes that criss-cross the entire surface area. This constructional solution allows the unit to work at part load over a heat transfer surface - represented by the area of the fins - that is larger than the solution with two independent coils for each circuit. This implies greater overall unit efficiency at part load and is available on the indoor coil for all models, and on the outdoor coil for models 0102 to AIR 3000 SE advanced controller All units are fitted with the AIR 3000 SE controller, especially developed by Climaveneta for rooftop units, featuring a liquid crystal display (LCD). This keypad accesses a user interface with seven European languages available; users can choose between Italian, English, French, German, Spanish, Swedish and Russian. This allows an interface that s specific for the country where the unit is installed, or alternatively, by setting English, completely independent for all other regions. Temperature control is performed using algorithms that control available devices (compressors, hot gas reheating coil, heating devices) based on the unit configuration; control is applied using the return air temperature probe reading, based on proportional or proportional + integral logic. Interfacing to commercially-available BMS systems is provided thanks to compatibility with BACnet, BACnet OverIP, ModBus and LonWorks protocols. The built-in clock provides a daily scheduler function, organised into time bands so as to optimise unit operation, minimising system energy consumption. In fact, several time bands (up to 10) of different types (4) can be activated throughout the day, with each band being assigned: temperature set point for cooling and heating humidity set point unit operating modes: control on, off, purging, start-up. constant pressure/flow: as pressure drop varies, the fans change speed so as to maintain pressure/flow-rate at the design value for the system, regardless of filter clogging and the actual static pressure of the ducting; variable flow-rate: as the percentage of unit device activation changes, the flow-rate varies within limits set by the user. Other available functions include: room humidity control in cooling and heating mode automatic temperature- and enthalpy-based freecooling management self-adaptive defrost management using algorithms that reduce defrost duration or prevent unnecessary or wasteful cycles demand limit on compressors to reduce mains power consumption set point compensation based on outside temperature, in both cooling and heating operation. Also available are display and acquisition of the last 200 alarm events (user level), as well as recording of operating variables in the 10 minutes prior to each alarm event (Black Box) with display via PC. Compatibility with remote keypad (management of up to 10 units). The fan section can be managed in the following modes: ON/OFF: the fans are on at maximum rotation speed or off, depending on whether or not the heating-cooling devices are operating; constant speed: the supply and return fans maintain a constant rotation speed; 8 WHISPER_ENTHALPY_0102_0604_201203_EN

9 4. DESCRIPTION OF THE UNIT Packaged autonomous Rooftop unit, reversible air cooled, for air temperature-humidity control, filtering and air change in large spaces. Operates in both winter and summer seasons, two refrigerant circuits, scroll compressors with R410A refrigerant, finned coil outdoor heat exchangers with thermodynamic effect of the exhaust air, axial-flow fans. Air handling section with plug fans on supply and return, rotary enthalpic heat recovery, finned coil indoor heat exchanger and motorised outside air, mixing and exhaust dampers. Air flow-rate management by constant pressure/flow-rate or variable flow-rate based on heating or cooling demand. Structure Outdoor structure with base made from hot galvanised steel sections, painted with epoxy powder coat, and Peraluman aluminium alloy panelling. Air handling section (indoor) completely separated from the refrigerant circuit control devices by double chamber, made from aluminium alloy sections and double wall sandwich panelling with 42 mm thick polyurethane foam insulation in between, inner surface made from hot galvanised sheet metal and outer surface from Peraluman aluminium alloy. The panels can be removed for complete access to the inside components. Compressors Hermetic rotary scroll compressors, R410A refrigerant, housed in a separate compartment; each compressor is fitted with crankcase heater and a two-pole electric motor with direct starting, internally protected against excess temperature. Indoor heat exchanger Direct expansion air handling coil for heat exchange with the refrigerant gas, made from a coil of mechanically expanded copper tubes and corrugated aluminium fins. Aluminium basin for collecting condensate, with sloping bottom and complete with drain attachment. Both refrigerant circuits use the entire heat exchange surface available (intertwined circuits), so as to achieve high energy efficiency with the unit operating at part load. The speed of the air through the coil is kept below the limit value of 2.7 m/s, even at full flow, to avoid entraining condensate, including in the most extreme temperature-humidity conditions. Outdoor heat exchanger Direct expansion outdoor coil for heat exchange between the refrigerant gas and the outside air, made from a coil of mechanically expanded copper tubes and corrugated aluminium. On sizes from 0102 to 0404, both refrigerant circuits use the entire heat exchange surface available (intertwined circuits), so as to achieve high energy efficiency with the unit operating at part load. Sizes from 0454 to 0604 have separate coils on each circuit. Refrigerant circuit The unit has two refrigerant circuits to ensure reliability, easy maintenance and repairs in the event of faults. Each circuit is also complete with the following: R410A refrigerant charge filter-drier liquid flow indicator thermostatic expansion valve with external equaliser liquid separator charge and pressure control valves high and low pressure safety valves non-return valve four-way valve for reversing the cycle. Indoor fans The supply and return fans are plug fans, with statically and dynamically balanced impellers according to DIN ISO 1940, quality grade G2.5 and G6.3. The motors are standard size with IP55 protection, class F insulation, directly coupled EC brushless motors for sizes 0102 to 0302, and three-phase asynchronous motors with inverter control for sizes 0352 to The fans are fitted with differential pressure transducers. Outdoor fans Wing shaped axial fans in die-cast aluminium, with external rotor. The electric motor is fitted with built-in thermal protector and self-supporting protective mesh on the outside. Motor index of protection IP55, insulation class F. Filtering section Filtering section made by G3 synthetic fibres plated filter for air treatment section, G1 metallic mesh filter and G3 synthetic fibres plated filter for fresh air section, G3 synthetic fibres plated filter for return air section. Placed on steel guides easily accessible for ordinary maintenance and replacement. Heat recovery Energy recovery system on the exhaust air, made up of a high efficiency enthalpy wheel consisting of alternating flat and corrugated aluminium sheets, with hygroscopic treatment, so as to create a series of passageways in the opposing directions to the flows of fresh and exhaust air. The wheel is driven by an electric motor at constant speed with very low power consumption. Both sensible and latent energy is recovered: this limits the introduction of moisture into the room during summer and increases humidity in winter. Rainproof hood Metal rain grill fitted on the external air damper for models from 0102 to 0404, to avoid suction of water inside the chamber, and anti-intrusion net on the expulsion damper. Metal rain grill fitted on the external air damper and rainproof hood on the free cooling external air damper for models from 0454 to 0604, to avoid suction of water inside the chambers; anti-intrusion net on the expulsion damper and rainproof with net on the free cooling expulsion damper Power and control electrical panel Power and control electrical panel built in compliance with EN and IEC204-1, complete with: control circuit transformer main door lock disconnect switch power section with busbars fuses and contactors for compressors and fans spring-loaded terminals on the control circuits (cage clamp) microprocessor electronic controller with supply temperature control. Protected by a removable Peraluman panel and two hinged doors with gaskets. Unit power supply voltage: 400V~ ±10% - 50Hz - 3N 9 WHISPER_ENTHALPY_0102_0604_201203_EN

10 AIR 3000 SE controller The AIR3000 SE controller stands out for its advanced functions and proprietary control strategies. The keypad features function controls and a complete LCD display for viewing data and activating the unit, via a multilevel menu, with settable display language. It can be used to set the unit start-up and indoor air purging stages, as well as to set unit the operating mode (manual heating or cooling, automatic changeover). Temperature control is based on proportional or proportional + integral logic using the return air temperature probe reading; the set point can also be adjusted based on the outside temperature, in both cooling and heating mode. Defrosts use proprietary self-adaptive logic involving monitoring of multiple operating and climate parameters. This reduces the number and duration of defrosts, consequently increasing overall energy efficiency. Supervision is available with different options, using proprietary devices or by integration into third party systems using ModBus, BACnet, BACnet-over-IP and Echelon LonWorks protocols. Compatibility with remote keypad (management of up to 10 units). The timer can be used to create an operating profile with up to 4 typical days and 10 different time bands. Certification Unit compliant with the following directives and amendments: Machinery directive 2006/42/EC. EMC 89/336/EEC /108/EC. Low voltage directive 2006/95/EC. Pressure equipment directive 97/23/EC. Form A1. TÜV Italia WHISPER_ENTHALPY_0102_0604_201203_EN

11 5. STANDARD UNIT CONFIGURATION 5.1 FCC Freecooling with plug fans on supply and return The units are available in one single configuration with three motorised dampers managed by the AIR 3000 SE controller on the unit, and allows automatic management of air supply, return, change, exhaust and recirculation. The unit works completely autonomously, without the need to extract air from the air-conditioned space using other devices: the supply air plug fan ensures the design air flow-rate, while the return air plug fan ensures recirculation and exhaust from the air-conditioned space. The control AIR 3000 SE controller also manages the freecooling function, as well as washing and start-up. 6. OPERATING MODES 6.1 Normal operation with mixing During normal operation the unit creates a mixture of return air from inside the space and outside air, in a fixed percentage set by the user, or managed automatically by the optional CO 2 probe or based on an external signal. The exhaust and outside air dampers are opened to a proportion such as to maintain pressure balance, based on the user settings, while recirculation damper management is complementary. 6.2 Freecooling / Freeheating operation This function is enabled when the temperature or enthalpy (optional) conditions of the outside air allow. The outside air and exhaust dampers are opened completely and the mixing damper is closed during 100% freecooling, the recovery wheel is stopped and for models it is bypassed. The device.s are progressively deactivated until they shut down completely; the percentage of freecooling is progressively reduced and the mixing damper opens as a consequence when the outside temperature falls. 11 WHISPER_ENTHALPY_0102_0604_201203_EN

12 6.3 Washing This optional function cleans the space with fresh outside air, without any additional process, and can be used after an extended period of closing or whenever the air inside the space needs to be changed quickly. During this procedure the compressors are off, the mixing damper is closed, while the exhaust and outside air dampers are fully open. 6.4 Start-up This optional function quickly brings the space to the desired temperature, when unoccupied, by completely recirculating the air, and can be used after the washing function. During this procedure the compressors are on, the outside air and exhaust dampers are closed, while the mixing damper is fully open. 12 WHISPER_ENTHALPY_0102_0604_201203_EN

13 7. ACCESSORIES CODE ACCESSORY NAME DESCRIPTION ADVANTAGES 411 Electrical Panel with forced ventilation 3301 Power factor correction 3412 Automatic circuit breakers Condensators on the compressors' power inlet line. Over-current switch on the major electrical loads ModBUS connectivity Interface module for ModBUS protocols 4182 Echelon connectivity Interface module for Echelon systems 4184 BACnet connectivity Interface module for BACnet protocols 1401 HP AND LP GAUGES High and low pressure gauges. 881 Cu/Cu condensing coils Condensing coils with epoxy-coated fins Condensing coils with Fin Guard Silver treatment 971 Cu/Cu internal coil Internal coil with Fin Guard Silver treatment Internal coil with pre-painted fins External coils Anti-intrusions grills 1300 Water heating coil 1310 Electrical heating coil Pressostatic condensing control for low ambient Variable step speed condensing control device Continuous variable speed condensing control Air-refrigerant heat exchanger with copper fins and tubes. Painted air-refrigerant heat exchanger. Air-refrigerant heat exchanger with epoxidic treatment on coils and fins. Internal air treatment coil with copper fins and tubes. Internal air treatment coil with epoxidic treatment on coils and fins. Internal air treatment coil with prepainted fins Water heating coil installed after the internal treatment coil Electrical heater installed after the internal treatment coil Step management of the axial fans on the base of the condensing pressure Electrical transformer to manage the air flow at 3 fixed speed values according to the condensing temperature. Continuous fans speed control on the base of the condensing pressure, cutting phase device The unit's average cos(phi) increases to a value (average) of 0,92. It protects compressors and/or fans from possible current peaks. Allows integration with BMS operating with ModBUS protocol Allows integration with BMS operating with LonWorks procotls Allows integration with BMS operating with BACnet protocol Allows immediate reading of the pressure values on both low and high pressure circuits. Recommended for applications in corrosive atmospheres Recommended for applications in medium level pollution atmospheres. Recommended for marine exposure conditions, with an high level of pollution or other aggressive atmospheres. Recommended for applications in corrosive atmospheres Recommended for marine exposure conditions, with an high level of pollution or other aggressive atmospheres. Recommended for applications in medium level pollution atmospheres. Avoid the intrusion of solid bodies into the unit's structure The coil is a heating source which can be used as integration or sobstitution in heat pump working. The electrical heating coil is a heating source which can be used as integration in heat pump working. When the unit is working at low external air temperatures, the device stops one or more fans in sequence in order to maintain control over condensing pressure When the unit is working at low external air temperatures, the uniform reduction of airflow over the entire surface of the coil offers accurate control of condensing pressure and decreases the overall noise level of the unit. When the unit is working at low external air temperatures, the uniform reduction of airflow over the entire surface of the coil offers accurate control of condensing pressure. 13 WHISPER_ENTHALPY_0102_0604_201203_EN

14 CODE ACCESSORY NAME DESCRIPTION ADVANTAGES 1337 Hot gas Post heating way valve Modulating gas fired heating module Rubber anti vibration device 2062 Right return air direction 2065 Left return air direction 2521 High efficiency bag filters, F Electronic filters 4121 Forced shut down Condensing finned coil, installed dowstream the treatment coil, fed by hot gas coming from the compressor's supply. For a correct functioning, this option is supplied with a humidity probe. Modulating mixing valve installed dowstream the water heatign coil, supplied mounted and with modulating drive. The heat module features an additional section inside the unit holding the condensation heating module, comprises a modulating premix gas burner and a stainless steel air/fumes exchanger. The heating module heats the air and discharges it into the room in such a way that it blows over the outer surface of the combustion chamber and the tubes of the exchanger. Return air on the right side, as regards of the air flow direction, to be specified in the order Return air on the left side, as regards of the air flow direction to be specified in the order Available in addition to standard filters, they are made from F7 efficiency fibreglass paper and are Class 1 fire resistant. The large inspection panels and steel guides make them easy to remove for cleaning or replacement. Fitted at the coil inlet and used instead of mechanical filtration F7. The electrostatic precipitation process, lying at the heart of the operating principle, comprises three main stages: electrically charging the airborne particles; capturing the particles; removing the captured particles. The particles are electrified by a discharge ionising device. Digital inlet to switch off the unit from remote Enthalpic control to bring the ambient humidity back to wellbeing values. Initial de-humidification phase made by the evaporating coil, that reduces humidity content in the air; final phase with post heating made by hot gas coil to correct supply air temperature The natural gas-fired heating module is ideal for particularly cold climates. In the heat pump versions, the module can be used to integrate the heat pump, while of course it replaces the heat pump in the cooling-only units.the gas-fired condensation heat module offers: high heating power with a very compact heating module; elevated efficiency (up to 105%) due to the exploitation of the condensation heat; practically zero CO emissions and Nox levels < 35 ppm thanks to the use of a premix burner. Mounted on the treatment coil inlet, they ensure that the air effectively introduced into the room is filtered. Used in high-efficiency applications (yields of 99%) to trap dust particles as small as one micrometre in diameter. Featuring very low pressure drops, they also save ventilating power. Electrostatic filters are designed for long service life and very low maintenance requirements, apart from routine cleaning which is automatically indicated by the filters. They also remove harmful pathogenic agents. High efficiency combined with a long service life allows the initial cost of the investment to be amortised by the extremely low management and running costs. 14 WHISPER_ENTHALPY_0102_0604_201203_EN

15 CODE ACCESSORY NAME DESCRIPTION ADVANTAGES 4141 CO 2 air quality probe 4142 External forcing 4-20 ma 4171 Remote forcing for air estraction 4172 Remote room washing 4173 Washing and running up 4132 Enthalpic Free cooling 4131 Ambient humidity probe 4271 Ambient air probe 4272 Return air probe 4300 Steam humidifier 1852 Filters differential pressure switch 4240 Return fan uprated motor 4250 Supply fan uprated motor Used to manage air quality inside the building. The signal is processed by the control unit in order to adjust the external air intake Remote forcing with 4-20 ma signal to manage the dampers for air renewal Digital input that manage the closing of the recirculation damper, the opening of the outlet and inlet dampers, the switching off of the compressors and the start of he supply and return fans Digital input for the complete renewal of air in the empty room. Estraction and expulsion of the ambient air, introduction of renewal external air with switched off compressors Function to be activated when the room is empty, first washing of the air in the room and then start-up in total air recirculation. Function manged by temperature and humidity probes, installed in a position allowing them to check and compare the energy status of both the ambient and the external air. The control manages the opening/closing of the dampers in order to exploit more favourable external conditions. Probe to measure relative humidity percentage in the ambient, intalled on the return Return air temperature probe supplied loose for ambient installation Return air temperature probe supplied loose for return duct installation Humidification takes place directly inside the unit using a steam diffuser immersed in the flow of treated air. The steam is generated inside an immersed electrode humidifier. Differential air presure switch to detect filters' obstruction, with warning Increment of the motor electrical power of the return fans Increment of the motor electrical power of the supply fans The automatic management of the air renewal allows to treat the external air only when necessary, granting compliance with personal wellbeing regulations Renewal of ambient air when the room has not been used for a long time or whenever all the ambient air requires rapid changing During Free cooling functioning, the resources are progressively disconnected, till complete switch off, keeping the requried termohygrometric ambient condition, thanks to the external favourable conditions. Adjustment of relative humidity in winter mode Increment of the static available pressure at the return fans intlet Increment of the static available pressure at the supply fans outlet 15 WHISPER_ENTHALPY_0102_0604_201203_EN

16 8. GENERAL TECHNICAL SPECIFICATIONS SIZE Cooling Cooling capacity kw 47,4 58,3 66,6 77,5 96,7 121,8 132,9 Cooling capacity recovery kw 13,6 15,7 17,0 19,7 27,7 32,0 35,3 Sensible capacity kw 31,3 38,0 43,6 52,2 64,2 79,1 87,6 Compressor power input kw 8,6 11,7 13,4 16,2 16,9 21,9 26,0 Heating Heating capacity kw 40,82 53,3 60,7 70,7 83,2 108,2 118 Heating capacity recovery kw 9,1 10,6 11,5 13,4 18,6 21,5 23,8 Compressor power input kw 7,2 9,9 10,8 12,8 13,7 17,6 20,6 Supply fan Type Plug fan (EC) Quantity no Supply air flow-rate m 3 /h Available static pressure Pa Unit power consumption kw 0,67 0,91 1,07 1,60 1,37 1,84 2,33 Return/exhaust fans Type Plug fan (EC) Quantity no Return air flow-rate m 3 /h Available static pressure Pa Unit power consumption kw 0,54 0,76 0,93 1,44 1,00 1,34 1,99 Outdoor fans Type Axial-flow Quantity no Outside air flow-rate m 3 /h Unit power consumption kw 0,48 0,48 0,48 0,48 2,00 2,00 2,00 Compressors Type Scroll Number of compressors no Number of circuits no Capacity steps no Charge Refrigerant kg 11,6 12,5 13,2 18,4 19,1 20,3 28,1 Oil kg 3,9 6,5 6,5 6,5 6,5 8,0 13,2 Standard unit dimensions Length mm Width mm Height mm Std. unit weight in operation kg Total sound power (1) Supply db(a) Return db(a) Outside db(a) Reference conditions Cooling: Outside 35 C 50% RH - Inside 27 C 47% RH - Mixture 30% Heating: Outside 7 C 87% RH - Inside 20 C 50% RH - Mixture 30% (1) Sound power Sound power values are taken from the supplier s technical documents and refer to individual fans with ducted outlet and open intake 16 WHISPER_ENTHALPY_0102_0604_201203_EN

17 8. GENERAL TECHNICAL SPECIFICATIONS SIZE Cooling Cooling capacity kw 156,9 160,1 175,8 195,3 224,9 242,7 Cooling capacity recovery kw 40,6 40,6 43, ,6 55,3 Sensible capacity kw 105,1 106,5 118,2 133,4 148,9 163,1 Compressor power input kw 31,4 33,0 36,9 40,5 44,0 52,2 Heating Heating capacity kw 139,6 142,5 158,8 173,4 206,5 223,6 Heating capacity recovery kw 27,6 27,6 29,6 33,4 35,3 37,9 Compressor power input kw 23,2 24,2 26,9 33,2 36,8 43,2 Supply fan Type Plug fan (inverter) Quantity no Supply air flow-rate m 3 /h Available static pressure Pa Unit power consumption kw 2,61 2,61 3,19 3,92 4,53 5,66 Return/exhaust fans Type Plug fan (inverter) Quantity no Return air flow-rate m 3 /h Available static pressure Pa Unit power consumption kw 1,83 1,83 2,25 2,21 2,58 3,41 Outdoor fans Type Axial-flow Quantity no Outside air flow-rate m 3 /h Unit power consumption kw 2,00 2,00 2,00 2,00 2,00 2,00 Compressors Type Scroll Number of compressors no Number of circuits no Capacity steps no Charge Refrigerant kg 29,0 29,3 41,1 45,7 53,7 69,9 Oil kg 13,0 13,0 13,0 15,6 16,0 26,4 Standard unit dimensions Length mm Width mm Height mm Std. unit weight in operation kg Total sound power (1) Supply db(a) Return db(a) Outside db(a) Reference conditions Cooling: Outside 35 C 50% RH - Inside 27 C 47% RH - Mixture 30% Heating: Outside 7 C 87% RH - Inside 20 C 50% RH - Mixture 30% (1) Sound power Sound power values are taken from the supplier s technical documents and refer to individual fans with ducted outlet and open intake 17 WHISPER_ENTHALPY_0102_0604_201203_EN

18 SUPPLY FAN MOTOR SPECIFICATIONS Size Air flow-rate Standard Large (MM1) Extralarge (MM2) m 3 /h Pa (1) rpm kw cons. kw inst. Pa (1) rpm kw cons. kw inst. Pa (1) rpm kw cons. Min ,22 5, Std ,76 5, Max ,84 5, Min ,82 5, Std ,94 5, Max ,86 5, Min ,98 5, Std ,94 5, Max ,88 5, Min ,40 5, Std ,74 5, Max ,50 5, Min ,50 7, Std ,16 7, Max ,62 7, Min ,88 7, Std ,52 7, Max ,58 7, Min ,22 7, Std ,58 7, Max ,48 7, Min ,92 8, ,5 15, Std ,32 8, ,0 15, Max ,96 8, ,8 15, Min ,92 8, ,5 15, Std ,32 8, ,0 15, Max ,96 8, ,8 15, Min ,24 15, Std ,92 15, Max ,92 15, Min ,90 15, ,1 22, Std ,86 15, ,9 22, Max ,92 15, ,8 22, Min ,88 15, ,7 22, Std ,86 15, ,9 22, Max ,90 15, ,8 22, Min ,86 15, ,7 22, Std ,88 15, ,8 22, Max ,84 15, ,8 22, kw inst. (1) Pa: Maximum available static pressure, unit in basic configuration 18 WHISPER_ENTHALPY_0102_0604_201203_EN

19 RETURN FAN MOTOR SPECIFICATIONS Size Air flow-rate Standard Large (MM1) Extralarge (MM2) m 3 /h Pa (1) rpm kw cons. kw inst. Pa (1) rpm kw cons. kw inst. Pa (1) rpm kw cons. Min ,22 5, Std ,76 5, Max ,84 5, Min ,82 5, Std ,94 5, Max ,86 5, Min ,98 5, Std ,94 5, Max ,88 5, Min ,40 5, Std ,74 5, Max ,50 5, Min ,50 7, Std ,16 7, Max ,62 7, Min ,88 7, Std ,52 7, Max ,58 7, Min ,22 7, Std ,58 7, Max ,48 7, Min ,92 8, ,5 15, Std ,32 8, ,0 15, Max ,96 8, ,9 15, Min ,92 8, ,5 15, Std ,32 8, ,0 15, Max ,96 8, ,9 15, Min ,98 8, ,2 15, Std ,92 8, ,9 15, Max ,92 8, ,9 15, Min ,92 8, ,9 15, Std ,90 8, ,9 15, Max ,80 8, ,9 15, Min ,92 8, ,9 15, Std ,82 8, ,9 15, Max ,84 8, ,9 15, Min ,86 15, Std ,88 15, Max ,84 15, kw inst. (1) Pa: Maximum available static pressure, unit in basic configuration 19 WHISPER_ENTHALPY_0102_0604_201203_EN

20 ELECTRICAL DATA Maximum values Size no. Compressors Each supply fan (1) F.L.I. F.L.A. F.L.I. F.L.A. F.L.I. F.L.A. F.L.I. F.L.A. L.R.A. no. F.L.I. [kw] [A] [kw] [A] [kw] [A] [kw] [A] [A] [kw] Each return fan (1) F.L.A. no. F.L.I. [A] [kw] Outdoor fans Total (1) F.L.A. no. F.L.I. F.L.A. F.L.I. [A] [kw] [A] [kw] ,55 13,79 6,55 13, ,00 2 2,50 4,00 2 2,50 4,00 2 0,48 0,93 24,06 45,44 118, ,73 16,86 7,73 16, ,00 2 2,50 4,00 2 2,50 4,00 2 0,48 0,93 26,42 51,58 134, ,99 15,15 8,99 15, ,00 2 2,50 4,00 2 2,50 4,00 2 0,48 0,93 28,94 48,16 133, ,53 18,36 10,53 18, ,00 2 2,50 4,00 2 2,50 4,00 2 0,48 0,93 32,02 54,58 178, ,82 19,93 11,82 19, ,00 2 3,60 5,70 2 3,60 5,70 2 2,00 4,00 42,04 70,66 192, ,48 25,22 15,48 25, ,00 2 3,60 5,70 2 3,60 5,70 2 2,00 4,00 49,36 81,24 214, ,44 30,62 17,44 30, ,00 2 3,60 5,70 2 3,60 5,70 2 2,00 4,00 53,28 92,04 221, ,44 30,62 24,04 40, ,00 2 4,71 8,40 2 4,71 8,40 2 2,00 4,00 64,32 112,22 287, ,53 18,36 10,53 18,36 10,53 18,36 10,53 18,36 142,00 2 4,71 8,40 2 4,71 8,40 2 2,00 4,00 64,96 115,04 238, ,82 19,93 11,82 19,93 11,82 19,93 11,82 19,93 142,00 2 8,53 14,80 2 4,71 8,40 2 2,00 4,00 77,76 134,12 256, ,82 19,93 11,82 19,93 15,48 25,22 15,48 25,22 158,00 2 8,53 14,80 2 4,71 8,40 4 2,00 4,00 89,08 152,70 285, ,48 25,22 15,48 25,22 15,48 25,22 15,48 25,22 158,00 2 8,53 14,80 2 4,71 8,40 4 2,00 4,00 96,40 163,28 296, ,44 30,62 17,44 30,62 17,44 30,62 17,44 30,62 160,00 2 8,53 14,80 2 8,53 14,80 4 2,00 4,00 111,88197,68 327,06 F.L.A. [A] S.A. [A] (1) Standard motors F.L.I. Power consumption at max. conditions allowed. F.L.A. Current draw at max. conditions allowed. L.R.A. Peak current of individual compressor. S.A. Peak current of unit with standard motors. Power supply: - 400/3/50 WITHOUT NEUTRAL - Allowable variation in voltage 10% - Maximum unbalance between phase voltages 3% 20 WHISPER_ENTHALPY_0102_0604_201203_EN

21 Two-row hot water coil performance (water C) Model Ret. air C Reduced air flow-rate Rated air flow-rate Higher air flow-rate kwt m 3 /h Water kpa 10 42,2 1,86 19,8 Air Pa (1) kwt m 3 /h Water kpa 64,8 2,86 42,9 Air Pa (1) kwt m 3 /h Water 15 38,8 1,71 17,0 5 59,5 2,63 36, ,2 2,79 41,0 kpa 68,9 3,04 47, ,3 1,56 14,4 54,2 2,39 31,0 57,6 2,54 34, ,1 2,08 24,1 72,2 3,19 52,1 75,9 3,35 56, ,2 1,91 20,7 7 66,3 2,93 44, ,6 3,08 48, ,4 1,74 17,5 60,3 2,66 37,6 63,4 2,80 41, ,1 2,21 27,0 76,4 3,38 57,6 79,9 3,53 62, ,1 2,03 23,2 8 70,1 3,10 49, ,3 3,24 53, ,0 1,85 19,6 63,8 2,82 41,7 66,7 2,95 45, ,2 2,53 34,2 85,5 3,78 70,6 88,6 3,92 75, ,5 2,32 29, ,5 3,46 60, ,3 3,59 64, ,8 2,11 24,8 71,4 3,15 51,0 74,0 3,27 54, ,9 3,79 14,3 134,0 5,92 31,9 164,0 7,23 45, ,9 3,48 12, ,0 5,40 27, ,0 6,63 39, ,9 3,18 10,4 112,0 4,95 23,1 137,0 6,03 33, ,9 4,28 17,8 149,0 6,58 38,6 176,0 7,78 52, ,0 3,93 15, ,0 6,04 33, ,0 7,13 44, ,1 3,58 12,9 124,0 5,50 27,9 147,0 6,49 37, ,0 4,63 20,5 160,0 7,06 43,8 182,0 8,05 55, ,3 4,25 17, ,0 6,48 37, ,0 7,38 7, ,7 3,87 14,9 134,0 5,90 31,7 152,0 6,72 40, ,0 5,18 25,1 178,0 7,84 52,9 185,0 8,15 56, ,0 4,76 21, ,0 7,19 45, ,0 7,48 48, ,1 4,34 18,2 148,0 6,54 38,2 154,0 6,80 41, ,0 5,57 28,6 187,0 8,25 57,9 187,0 8,25 57, ,0 5,12 24, ,0 7,56 49, ,0 7,56 49, ,0 4,66 20,7 156,0 6,88 41,8 156,0 6,88 41, ,0 7,23 24,2 251,0 11,10 52,8 375,0 12,15 62, ,0 6,64 20, ,0 10,19 45, ,0 11,15 53, ,0 6,05 17,7 210,0 9,27 38,2 230,0 10,15 45, ,0 7,57 26,5 262,0 11,57 56,9 285,0 12,59 66, ,0 6,96 22, ,0 10,62 48, ,0 11,55 56, ,0 6,34 19,3 219,0 9,66 41,1 238,0 10,51 47, ,0 8,06 29,7 277,0 12,24 63,0 299,0 13,20 72, ,0 7,41 25, ,0 11,23 53, ,0 12,12 61, ,0 6,75 21,5 231,0 10,23 45,6 249,0 11,02 52,1 Air Pa (1) (1) For correct calculation of the available static pressure, subtract this value from the data for the basic unit. kwt = Heating capacity m 3 /h = Water coil flow-rate Pa = Air coil pressure drop kpa = Water coil pressure drop 21 WHISPER_ENTHALPY_0102_0604_201203_EN

22 Three-row hot water coil performance (water C) Model Ret. air C kwt Reduced air flow-rate Rated air flow-rate Higher air flow-rate m 3 /h Water kpa 10 55,1 2,43 15,4 Air Pa (1) kwt m 3 /h Water kpa 87,5 3,87 35,5 Air Pa (1) kwt m 3 /h Water 15 50,7 2,24 13,2 8 80,4 3,55 30, ,9 3,79 34,3 kpa 93,5 4,13 39, ,2 2,04 11,2 73,3 3,24 25,8 78,2 3,46 29, ,0 2,74 19,1 98,3 4,35 43,8 104,0 4,58 48, ,0 2,52 16, ,3 3,99 37, ,3 4,21 41, ,0 2,30 13,9 82,3 3,63 31,7 86,8 3,83 34, ,4 2,93 21,6 105,0 4,62 48,8 110,0 4,84 53, ,0 2,70 18, ,0 4,24 41, ,0 4,45 45, ,7 2,46 15,7 87,4 3,86 35,4 91,7 4,05 38, ,5 3,38 27,8 118,0 5,21 60,7 123,0 5,41 65, ,3 3,11 23, ,0 4,79 52, ,0 4,97 55, ,1 2,83 20,3 98,6 4,36 44,0 102,0 4,52 47, ,0 4,93 12,1 180,0 7,97 28,7 224,0 9,88 42, ,0 4,53 10, ,0 7,32 24, ,0 9,08 36, ,7 4,14 8,8 151,0 6,68 20,8 187,0 8,27 30, ,0 5,62 15,3 202,0 8,93 35,2 242,0 10,70 48, ,0 5,17 13, ,0 8,20 30, ,0 9,82 41, ,0 4,72 11,1 169,0 7,84 25,5 202,0 8,94 35, ,0 6,12 17,8 218,0 9,64 40,4 251,0 11,09 52, ,0 5,63 15, ,0 8,85 34, ,0 10,19 44, ,0 5,13 13,0 183,0 8,07 29,3 210,0 9,27 37, ,0 6,91 22,2 244,0 10,78 49,4 255,0 11,24 53, ,0 6,35 19, ,0 9,90 42, ,0 10,32 45, ,0 5,79 16,1 204,0 9,02 35,8 213,0 9,40 38, ,0 7,48 25,5 258,0 11,39 54,5 258,0 11,39 54, ,0 6,87 21, ,0 10,46 46, ,0 10,46 46, ,0 6,26 18,6 216,0 9,52 39,5 216,0 9,52 39, ,0 9,49 12,4 341,0 15,06 28,5 376,0 16,60 34, ,0 8,72 10, ,0 13,83 24, ,0 15,23 29, ,0 7,96 9,0 285,0 12,59 20,7 314,0 13,88 24, ,0 9,98 13,6 356,0 15,75 30,9 390,0 17,22 36, ,0 9,18 11, ,0 14,46 26, ,0 15,82 31, ,0 8,37 9,9 298,0 13,17 22,4 326,0 14,41 26, ,0 10,68 15,4 349,0 16,73 34,4 411,0 18,13 39, ,0 9,81 13, ,0 15,36 29, ,0 16,66 34, ,0 8,95 11,2 317,0 13,99 25,0 343,0 15,17 28,9 Air Pa (1) (1) For correct calculation of the available static pressure, subtract this value from the data for the basic unit. kwt = Heating capacity m 3 /h = Water coil flow-rate Pa = Air coil pressure drop kpa = Water coil pressure drop 22 WHISPER_ENTHALPY_0102_0604_201203_EN

23 ELECTRIC COIL (optional) Unit/electric coil combinations UNIT SIZE Heating capacity Steps ELECTRIC COIL SIZE [kw] [no] 7 7,2 1 X X X X 12 12,0 2 X X X X X X X 18 18,0 2 X X X X X X X 27 27,0 2 X X X 36 36, ,0 2 UNIT SIZE Heating capacity Steps ELECTRIC COIL SIZE [kw] [no] 7 7, , ,0 2 X X X 27 27,0 2 X X X X X X 36 36,0 2 X X X X X X 45 45,0 2 X X X Three-phase power supply with star connection, no neutral 23 WHISPER_ENTHALPY_0102_0604_201203_EN

24 STEAM HUMIDIFIER (optional) Unit/humidifier combinations UNIT SIZE Power consumption Steam production HUMIDIFIER SIZE [kw] [kg/h] UM 03 2,3 3 X X UM 05 3,8 5 X X X X X X X UM X X X X X X X UM 10 7,5 10 X X X X X X X UM 15 11,2 15 X X X UM 25 18,8 25 X X X UM 35 26,3 35 UM 45 33,8 45 UNIT SIZE Power consumption Steam production HUMIDIFIER SIZE [kw] [kg/h] UM 03 2,3 3 UM 05 3,8 5 UM UM 10 7,5 10 X X X X X X UM 15 11,2 15 X X X X X X UM 25 18,8 25 X X X X X X UM 35 26,3 35 X X X X X X UM 45 33,8 45 X X X X X X 24 WHISPER_ENTHALPY_0102_0604_201203_EN

25 9. GAS-FIRED HEATING MODULE units can be fitted with systems for heating air before discharging it into the room as a results of our company s decision to supply a highly reliable product capable of completely conditioning a room and offering a constant level of comfort. The traditional techniques used for this purpose, hot water or electric heaters, can be replaced by a gas-fired heat module, that is a purpose-built air heater incorporated into the Roof Top unit. This solution is useful where there is no hot fluid, water or steam. Furthermore, the use of hot water coils causes greater heat dispersion due to the distribution of the fluid and the risk of the system freezing if it is not used during winter. Electric coils also reduce heat capacity, require high rated power inputs and generate high running costs. The WHISPER Enthalpy units can be fitted with a gas-fired heat module. In the heat pump versions, the module can be used to provide additional heat or as an alternative to the heat pump itself. Innovative technologies The innovative fumes condensation and modulating gas air premixing technologies offer heating modules featuring unprecedented energy saving. They allow gas consumption to be reduced by over 12% compared with conventional air heaters and drastically reduce polluting emissions. Condensation technology To reduce energy losses due to the heat dispersed by fumes into the atmosphere, the discharge temperature is lowered by exploiting sensitive and latent heat (condensation heat of vapour). The use of this technology offers heating modules featuring elevated efficiency values: between 105% and 93.1% (min. and max. load) and very low emissions of pollutants: no carbon monoxide; NOx emissions less than 30 ppm. With reduced loads, an optimal air/gas ratio maximises the exploitation of the fumes condensation heat. The combustion chamber is totally made of AISI 430 stainless steel; the exchanger tubes and fumes manifolds are made of AISI 304L stainless steel in order to offer enhanced resistance to the products of condensation and relative acid compounds. Modulating gas-air pre-mixing technology Conventional heat modules (the on/off type) alternate on and off periods to adapt their efficiency to the effective heat loads required. This causes: - thermal shock; - ignition transients featuring low efficiency and high pollution; - elevated energy losses from the flue when the burner is off. CLIMAVENETA uses modules fitted with modulating gas air premix burners. In these burners, suitable servo motors, governed by an electronic controller, premix air and gas according to optimal ratios and adjust the total flow of the blend so as to obtain infinite heating output values within a wide operating range (1:3 / 1:5). With reduced loads, an optimal air/ gas ratio maximises exploitation of fumes condensation heat. Adjustment and control The heat module is fitted with an electronic card for controlling all management and adjustment functions. A second control card is used to adjust the heating output and modulates according to a Vdc input signal from the Roof Top unit controller. 25 WHISPER_ENTHALPY_0102_0604_201203_EN