ERACS2-WQ. Climaveneta Technical Bulletin ERACS2_WQ_0802_3202_201110_EN. Units for 4 pipes-systems water source kw

Transcription

1 Climaveneta Technical Bulletin ERACS2_WQ_0802_3202_201110_EN kw Units for 4 pipes-systems water source (The photo of the unit is indicative and may change depending on the model) Unique proposal Energy saving Extensive range of operation Integrated condensing control

2 SUMMARY 1. roduct presentation 1.1 Unique proposal 1.2 Energy saving 1.3 Extensive range of operation 1.4 Integrated condensing control 1.5 Tests 2. Unit description 2.1 Units for 4 pipes-systems water source 2.2 Standard unit composition 2.3 Certifi cation 2.4 Unit s tests 2.5 Electronic control W3000SE Large 2.6 Accessories 2.7 Operating principle 2.8 Group regulation device 2.9 Supervisory device 3. Technical data 3.1 General technical data 4. Operating range 5. Hydraulic data 5.1 Water fl ow and pressure drop 6. Electrical data 7. Full load sound level 8. Dimensional drawings 9. Legend of pipe connections 10. Condensation control devices 11. Variable fl ow system (optional) 12. Hydraulic connections recommended pg. n III pg. n III pg. n III pg. n III pg. n III pg. n IV pg. n 1 pg. n 1 pg. n 1 pg. n 2 pg. n 2 pg. n 2 pg. n 3 pg. n 4 pg. n 5 pg. n 5 pg. n 6 pg. n 6 pg. n 8 pg. n 9 pg. n 9 pg. n 10 pg. n 11 pg. n A1 pg. n A6 pg. n B1 pg. n C1 pg. n D1 Company quality system certifi ed to UNI EN ISO 9001 and environmental certifi cation UNI EN ISO Liability disclaimer This bulletin is not exhaustive about: installation, use, safety precautions, handling and transport. Refer to General Manual for Installation for further informations. This bulletin refers to standard executions, in particular for dimension, weight, electric, hydraulic, aeraulic and refrigerant connections (whereas applicable). Contact Climaveneta Commercial Offi ce for further drawings and schemes. Climaveneta declines any liability derived from the bulletin s use. This bulletin is of exclusive property of Climaveneta, and all forms of copy are prohibited. The data contained herein are subject to variation without notice. II ERACS2_WQ_0802_3202_201110_EN

3 1. RODUCT RESENTATION The series multi-use units are able to simultaneously meet hot and cold water production requests and are thus a valid alternative to traditional systems based on chillers and boilers for applications such as offi ce blocks, pools and shopping centres. The advanced control logic, developed by Climaveneta, ensures that heating and cooling loads are perfectly met. When these are simultaneous, the unit exchanges evaporation and condensation heat with the system cooling and heating circuits respectively. When heat loads are not balanced or one of the two are missing, the unit automatically switches to a third heat source which can be air or water according to the model. The units are ideal for indoor installation. For these products, heat is exchanged on the source side by a shell & tube exchanger that acts as a condenser or evaporator according to machine conditions. The heat source is made up of natural resources such as surface water basins or bore hole water associated with geothermal systems. 1.1 Unique proposal Unit designed to satisfy the cold and the hot side requirements simultaneously, for 4-pipe systems without any particular operation mode setting. 1.2 Energy saving Energy saving guaranteed by the advanced operation s logic. The best operation mode is set completely automatically and independently by the unit s controller, in order to minimize the absorbed energy whatever the cooling and/or heating demand might be. 1.3 Extensive range of operation Supply of hot water in use up to 55 C, offering maximum versatility with respect to different plant engineering solutions. 1.4 Integrated condensing control A pressostatic valve is supplied as standard for the condensation control. Under request is available even a 3-way valve option, for all the applications in which a constant waterflow is assumed to be on the condenser. III ERACS2_WQ_0802_3202_201110_EN

4 1.5 Tests erfect functionality of Climaveneta units is guaranteed by accurate tests carried out along the productive process, and by fi nal test of every unit at the end of the work cycle, as imposed by ISO9001. Climaveneta also offers clients the chance to require and witness additional performance and sound level tests be performed; highly skilled technical crew follow these operations in detail, to ensure maximum satisfaction of the customer. For units of the ERACS series Climaveneta offers the possibility to conduct visionati or presenziati tests. Running tests are standard tests similar to those normally conducted at the productive unit that the client can observe without participation. Witness tests are extra tests that the client can observe and during which can request clarifi cations upon modalities or work conditions of the unit, receiving test reports at the end. Witness tests can include sound level and performance tests. Acoustical tests allow to verify levels of sound emissions of the unit; tests are performed repeating measurements of sound pressure in determined points, positioned on an ideal grid with walls 1 meter distance from the unit panels. For every measuring point a spectrum in octave band for sound pressure and the average value is supplied to the customer. Then the average global values for pressure at 1 meter, according to ISO3744, and the average sound power, referred to the whole unit, are counted. erformance tests are based on the measurement of electric data, water fl ow, working temperature, electric power absorbed, and capacity delivered. Measurements can be made at one or three work points while varying the outlet temperatures of the evaporator and condenser conditions. At the clients discretion, performance tests can be conducted under full or part load conditions for every operating mode possible for the unit. Full load tests conducted in one or three work points permit two further personalized versions: with a mixture of ethyl glycol water in the heat exchanger; up to the maximum working temperature of the heat exchanger on the source side. art load tests can be conducted using two different load partialization methods: the fi rst one requires to reduce the active resources number, while second one requires to modulate load on each resource. At part load the unit can be tested just in one working point. The following two tests can always be requested during fi nal testing: Simulation of the most common alarm states Measurement of pressure drop of exchanger on hydraulic circuit side IV ERACS2_WQ_0802_3202_201110_EN

5 2. UNIT DESCRITION 2.1 Units for 4 pipes-systems water source Multi-purpose indoor unit for use in 4-pipe systems for the simultaneous production of chilled and hot water by means of two independent water circuits. These units are able to satisfy the demand for hot and cold water simultaneously through a system that does not require seasonal switching. Each circuit works with a semi-hermetic screw compressor using R134a, and three tube nest heat exchangers, a cold exchanger on the user side shared by both circuits that acts as an evaporator in the production of cold water, a heat exchanger on the user side that words as a condenser in the production of hot water, and a source side exchanger that works as either condenser or evaporator as required by the loads. 2.2 Standard unit composition Frame Frame in polyester-painted galvanized steel. The self-supporting frame is built to guarantee maximum accessibility for servicing and maintenance operations. Refrigerant circuit The unit has two completely independent cooling circuits in order to ensure continuous operation, limited pollution, and easy maintenance. Each cooling circuit is fi tted as standard with: externally equalised thermostat valve safety valves and high and low pressure transducers check valve on the compressor delivery line on-off cock on the compressor delivery line and refrigerant line solenoid valve on the refrigerant line dryer fi lter with replaceable cartridge refrigerant line sight glass with humidity indicator high-pressure safety pressure-switch. Screw compressors Semi-hermetic screw compressors with 2 fi ve- and six-lobe rotors: the fi ve-lobe rotor is splined directly onto the motor without the use of interposed overgears. The use of the two rotors permits elevated volumetric output, uniform gas fl ow without pulsation, and reduced vibration and dimensions. The bearings provided along the rotor axis in a separate chamber isolated from the compression chamber are made in carbon steel. The insertion of an economiser between the source-side heat exchanger and the cold exchanger on the user side permits increased cooling output and EER. Each compressor is provided with an inlet for the injection of refrigerant (for the extension of operating limits) and the use of the economiser. Lubrication is forced without using an oil pump; the built-in oil separator has 3 stages of separation, and a 10 mm stainless steel mesh fi lter ensures the constant presence of oil inside. Cooling power is partialised by a slide valve, which depending on the position assumed, permits compression chamber reduction by steps; each compressor can therefore deliver 100%, 75% and 50% of its capacity. The two pole motors with 2950 rpm rotation speed are fi tted with electric devices that limit the current absorbed during compressor start-up and empty start-up, both of which are preset as standard. Each compressor is fi tted with manual-reset motor thermal protection, delivery gas temperature control, oil level check, and an electric resistance for the heating of the sump when the compressor is stopped. A check valve fi tted on the refrigerant delivery line prevents the rotors from reversing after stopping. On-off cocks on the delivery line of each compressor can cut off the supply of refrigerant gas to the exchangers when required. lant -side cold heat exchanger The direct expansion type tube nest exchanger acts as an evaporator with refrigerant fl ow on the tube nest side and water fl ow on the shell side. The tubes have asymmetrical fl ows that maintain the correct speed of the refrigerant in the tubes when passing from the liquid phase into steam. The water fl ow on the shell side is fi tted with baffl es to increase turbulence and therefore the effi ciency of exchange. The steel shell has external foamed closed-cell elastomer insulating lining 10 mm thick and thermal conductivity of W/mK at 0 C. The tube nest is manufactured using copper tubes with internal grooves for favouring heat exchange and mechanically expanded onto the tube plates. The heat exchanger is fi tted with a differential pressure switch which controls the fl ow of water when the unit is working, in this way preventing the formation of ice inside. The heat exchanger is made in compliance with ED standard work pressure requisites. lant -side hot heat exchanger The tube nest heat exchanger acts as a condenser with refrigerant fl ow on the tube nest side and water fl ow on the shell side. The tubes have asymmetrical fl ows that maintain the correct speed of the refrigerant in the tubes when passing from the liquid phase into steam. The water fl ow on the steel shell side is fi tted with baffl es to increase turbulence and therefore the effi ciency of exchange. The tube nest is manufactured using copper tubes with internal grooves for favouring heat exchange and mechanically expanded onto the tube plates. The heat exchanger is fi tted with a differential pressure switch which controls the fl ow of water when the unit is working, in this way preventing anomalies and overheating. The heat exchanger is made in compliance with ED standard requisites for work pressure. Source -side heat exchanger The tube nest heat exchanger guarantees the energy balance in the circuit whenever the heat and cold loads have different values and therefore acts as either evaporator or condenser as required, with refrigerant fl ow on the tube nest side and water fl ow on the shell side. The tubes have asymmetrical fl ows that maintain the correct speed of the refrigerant in the tubes when passing from the liquid phase into steam. The steel shell has external foamed closed-cell elastomer insulating lining 10 mm thick and thermal conductivity of W/mK at 0 C. The tube nest is manufactured using copper tubes with internal grooves for favouring heat exchange and mechanically expanded onto the tube plates. The heat exchanger is fi tted with a differential pressure switch which controls the fl ow of water when the unit is working, in this way preventing the formation of ice inside. Condensation control is ensured by a 2-way modulation valve that adjusts the fl ow of water inside the exchanger (see dedicate section). Electric power and control power Electric power and control panel compliant with EN / IEC 204-1, complete with: electronic controller transformer for control circuit general door lock isolator power circuit with bar distribution system fuses and contactors for compressors terminals for cumulative alarm block remote ON/OFF terminals spring-type control circuit terminal boards phase sequence relays. 1 ERACS2_WQ_0802_3202_201110_EN

6 2.3 Certification CE - roduct quality certifi cate for the European Union GOST - roduct quality certifi cate for Russian Federation SAFETY QUALITY LICENCE - roduct quality certifi cate for opular Republic of China M&I - roduct quality certifi cate for Australia and New Zealand Machine directive 2006/42/CE ED directive 97/23/EC Low Voltage directive 2006/95/EC ElectroMagnetic compatibility directive 2004/108/EC ISO Company s Quality Management System certifi cation ISO Company s Environmental Management System certifi cation 2.4 Unit s tests Testing is conducted throughout the productive process using the procedures specifi ed in ISO9001. Both performance and sound tests can be performed in the presence of the client upon payment. erformance tests consist in the measurement of electric data, water fl ows, work temperature, absorbed power and power output under both full and partial load conditions. During performance tests, the main alarm states can be simulated and the pressure drops in the exchangers can be measured. Sound tests permit the verifi cation of the sound power level radiated by the unit and provide the client with the sound pressure spectrum in octave bands, the average sound pressure level, and its average global sound pressure values at a distance of 1 meter, and the sound power produced by the entire unit. 2.5 Electronic control W3000SE Large The controller W3000 large offers the latest control and functions specially developed for these units. The keypad is generously sized with full operating status display. The controls and detailed LCD make access to machine settings easy and safe. These resources permit to diirectly act on the unit settings through a multilevel menu, available in several languages. The diagnostics includes full management of alarms with blackbox functions and alarm record for better analysis of unit performance. For multi-units plants a special device to coordinate and manage all the resources is available as an option; energy metering device is even possible as an option. Supervision is easy through Climaveneta devices or with various options for interfacing to ModBus, Bacnet, Echelon LonTalk protocols. Compatibility with remote keyboard (management up to 10 units). Clock available with programming of operation (standard 4 days and 10 time bands). Temperature regulation managed on the two water circuits, with a proportional logic referred to the return water temperatures. This allows to satisfy simultaneously the different heating- and cooling requests, with no need of mode changeover. 2 ERACS2_WQ_0802_3202_201110_EN

7 2.6 Accessories ACCESSORIES DESCRITION BENEFIT Soft start Electronic expansion valve (only cooling) Integral acoustic enclosure basic Integral acoustic enclosure plus 3 way-valve for the condensing pressure control (see dedicate section) VF system (see dedicate section) Compressors' on/off signal ModBUS connectivity BACnet connectivity Echelon connectivity Auxiliary signal 4-20mA Automatic circuit breakers Input remote Demand Limit Numbered cables on electrical board Remote signal double set-point Evaporator flowswitch (water side) Container packing Rubber anti vibration device DEMETRA (see dedicated manual) Group regulation device Supervisory device Electronic device adopted to manage the inrush current. Electronic lamination device wtih step motor. It is designed for the continuous and precise control of refrigerant fl ow entering in the evaporator. This solution permits extremely short times for reaction to variation in load, optimising power consumption. Enclosure realized with peraluman panels lined with an acoustic insulation made by polyester fi ber of thickness 30 mm. The sound power level reduction achieved with this accessory is 14 db(a). Enclosure realized with peraluman panels lined with a special acoustic insulation composed by 5 alternating layers of polyurethane and gaiter of total thickness 50 mm. The sound power level reduction achieved with this accessory is 18 db(a). 3 way modulating valve in grey cast iron with diverting function. The valve is selected and tested by Climaveneta during the unit's test. Recommended for geo-thermal applications, in which constant waterfl ow is necessary. (Separately supplied, not mounted) redisposition for the variable fl ow pumps' control on the primary circuit/s. The system comprises: extensions on the controller to read the system's pressure transducer signals (4-20 ma) and the consequent management of pumps and bypass valve (0-10 V signal), additional pressure transducer as extra safety device. [ressure transducer, pumps and bypass valve at client responsability] Auxiliary contacts providing a voltage-free signal Interface module for ModBUS protocols Interface module for BACnet protocols Interface module for Echelon systems 4..20mA analogue input. Allows to change the operating set-point according to the value of current applied to the analogue input Over-current switch on the major electrical loads. Digital input (voltage free) Allows to activate the Energy Saving set-point Software to monitor capacity and energy absorbed by the units. (see dedicate section) (see dedicate section) Break down of the inrush current as soon as the electrical motor is switch on, lower motor's mechanical wear, favourable sizing for the electrical system. Energy consumption associated with fl uid circulation drops signifi cantly, very often over 50%. Beyond the energy saving and the consequent lower operating costs, this new approach enables simplifi cation in the plant's design that ensures substantial savings in initial investment costs. The integration of variable fl ow pumps on board, permits signifi cant savings in overall dimensions, circuit components and in the system's commissioning. Allows remote signalling of compressor's activation or remote control of any auxiliary loads. Allows integration with BMS operating with ModBUS protocol Allows integration with BMS operating with BACnet protocol Allows integration with BMS operating with LonWorks procotls Enforce Energy Saving policies It protects compressors and/or fans from possible current peaks. It permits to limit the unit's power absorption for safety reasons or in temporary situation. Enforce Energy Saving policy Allows a dynamic monitoring of the installed units and therefore a data (hourly based) downloading to support the current needs of energy management. 3 ERACS2_WQ_0802_3202_201110_EN

8 2.7 Operating principle The units are especially designed for 4 pipes systems. Their hydraulic circuits are therefore divided into two separated sections: one hot (condenser side) and one cold (evaporator side). [See picture below]. These units can produce hot and chilled water at the same time and totally indipendently, adapting to the various temperatures requests inside the building. There are three basic operating confi gurations which are totally independent from external temperature conditions: - only chilled water production (the unit works as a simple chiller); - only hot water production (the unit works as an heat pump); - combined production of hot and chilled water (the unit produces simultaneously and autonomously cold and hot water for the two plant s sections). The above working confi gurations are selected automatically (on-board microprocessor) in order to minimize the absorbed energy and satisfy each thermal building s requests. compressor Hot primary circuit compressor condenser condenser circuit 1 circuit 2 liquid separator liquid separator liquid receiver evaporator liquid receiver ONLY CHILLED WATER RODUCTION The unit works like a simple chiller water condensed. The cold primary circuit water is cooled thanks to the heat exchange on the evaporator, while the condensation heat is rejected in the external water source through a shell and tube heat exchanger which works like a condenser. ONLY HOT WATER RODUCTION In this case, the unit works exactly like a heat pump. The hot primary circuit water is heated thanks to the heat exchange on the condenser, while the evaporation heat is obtained from the external water source through a shell and tube heat exchanger which, in this case, works like an evaporator. The main difference with traditional heat pumps is that the hot water is produced in a heat exchanger which is not the same of the one previously used to produce chilled water. This is necessary in order to keep the hot and cold plant s sections separate as required by 4-pipes systems. Cold primary circuit COMBINED RODUCTION OF HOT AND CHILLED WATER If users required hot and chilled water at the same time, the unit behaves like a water-water unit, managing condensation and evaporation on two separate heat exchangers connected with the two separate circuits (hot and cold) of the 4-pipes plant. The cooling and heating energy are provided respectively to evaporator and condenser. These heat exchangers are then hydraulically coupled to the two circuits (cold and heat) of the 4-pipes plant. The multi-purpose units are designed with two separate refrigerant circuits. Thanks to the advanced control logic specifi cally developed for these units, this solution ensures the units are always able to respond to building climate control requirements. The two refrigerant circuits are intelligently managed by the unit s controller and are able to adopt independently one from the other the most convenient operation mode to satisfy the building s requirements with the highest effi ciency. The use of suitable thermal accumulations, both on the cold and hot sides, offers effective system operating modularity and optimises running costs. 4 ERACS2_WQ_0802_3202_201110_EN

9 2.8 Group regulation device MANAGER 3000 Manager3000 allows the regulation within a group of hydronic units. The controller features high-level algorithms and user interface. The controller is suitable for the management of 2- or 4-pipe systems, with regulation on one water circuit, for chiller- or heat pump units and relevant mode change-over, and also with regulation on two circuits, with independent set-points and parameters, thus exploiting the simultaneous supply of chilled- and hot water. The controller manages up to 8 units, with activation logic focused at the balancing of operation times and at the achievement of the highest energy effi ciency. It is possible to defi ne conditions of dynamic stand-by and priority as regards the units activation. It is also feasible the rotation among the system s units, also in cases of constant load. The alarm management is featured, with plain text descriptions and possible notifi cation to remote recipients. Two relay outputs are available, associated to unit- and device alarms. The user interface allows a safe and easy use, thanks to its touch-screen display, back-lit 8.4 type. The multi-level menu features the language selection and differentiated access profiles(user and maintenance).the circuit temperatures and the status of both system- and unit- operation are displayed, via one overview page plus detailed pages. The regulation can be based on proportional- or proportional+integral logics, or also on a dead-band algorithm with dynamic adjustment, with relevant temperature inputs managed by the device. Features as set-point offset, also referred to the outdoor temperature, and demand limit are included, with relevant analog inputs. The device is integrated in the best way with the units, preventing simultaneous activations or resources and optimizing effi ciency, overall inrush current values and also operation of water pumps possibly associated to the units. The WebManager option allows the access to the device and its settings, via any computer, with direct- or LANbased connection, therefore also via internet resources; this is associated to the availability of historical charts for the main operating variables. The Variable rimary Flow option represents a unique regulation dedicated to hydronic systems with variable water fl ow. This represents a crucial contribution to the reduction of the costs related to the hydraulic plant and its operation. It is available as option the interface with the Demetra metering device: thus it is possible to acquire and log the values of the system units electric consumption, together with their operating status; this allows therefore to analyze the system s operating performances throughout time, in terms of both absorbed energy and cooling / heating capacities, consistently with the implementation of enhanced energy management policies for the building. 2.9 Supervisory device FWS 3000 Supervisory device for a system composed of Climaveneta units. Supervision can be operated via any computer, with direct- or LAN-based connection. It is therefore achieved the internet-based management of the resources, thanks to the built-in web-server and to the availability of web pages specifi cally defi ned both for the overall system monitoring and the access to detailed information about each unit. The supervision achieved by this way does not require the installation of any additional software on the computer and utilizes the most common browsers. This allows the use of any computer connected to the network or web. A RS-485 serial connection is available for the communication with the slave devices, up to 15 connected units. FWS3000 is particularly effective for the supervision of systems composed of packaged or WET units. The access to the supervision is easy and safe, thanks to the use of password. It is possible to visualize a complete list of unit operational variables: temperatures, humidity, indoor air quality, status of the unit. This is associated to the availability of historical charts for the main operating variables. It is also available the display of alarms, with plain text descriptions and possible notifi cation to remote recipient. The setting of the main operational parameters, for each unit, is also allowed: unit status, mode, set-point, time scheduling (based on 4 days, 10 time belts per day). Various levels of customization are offered, for both the web pages and connectivity-related functions. It is available as option the interface with the Demetra metering device: thus it is possible to acquire and log the values of the system units electric consumption, together with their operating status; this allows therefore to analyze the system s operating performances throughout time, in terms of both absorbed energy and cooling / heating capacities, consistently with the implementation of enhanced energy management policies for the building. 5 ERACS2_WQ_0802_3202_201110_EN

10 3.1 GENERAL TECHNICAL DATA SIZE COOLING (1) Cooling capacity kw Total power input (unit) kw 34,2 43,0 48,5 57,1 65,8 76,9 86,0 EER 5,68 5,58 5,66 5,71 5,66 5,65 5,58 ESEER Heat exchanger water flow m³/h 33,4 41,3 47,3 56,1 64,1 74,8 82,6 Heat exchanger pressure drop ka 29,0 36,7 49,2 42,5 38,4 49,5 28,6 Source (side) heat exchanger water flow Source (side) heat exchanger pressure drop m³/h ka HEATING (2) Heating capacity kw Total power input (unit) kw CO Heat exchanger water flow m³/h Heat exchanger pressure drop ka /R REFRIGERATION AND HEATING (3) Cooling capacity kw Total power input (unit) kw 45,7 56,9 65,8 76,3 86, Heat exchanger water flow m³/h 33,4 41,3 47,3 56,1 64,1 74,8 82,6 Heat exchanger pressure drop ka 29,0 36,7 49,2 42,5 38,4 49,5 28,6 Heat recovery thermal capacity kw CUE - Coefficient of useful effect 8,04 8,01 7,91 8,08 8,10 7,94 7,88 Heat exchanger recovery water flow m³/h 35,7 44,3 50,6 59,8 68,3 79,8 89,2 lant side heat exchanger recovery pressure drop ka 33,1 42,1 56,3 48,3 43,5 56,3 33,4 COMRESSORS Number N Number of capacity N Number of circuits N Type of regulation STES STES STES STES STES STES STES Minimum capacity steps % Type of refrigerant R134a R134a R134a R134a R134a R134a R134a Refrigerant charge kg Oil charge kg NOISE LEVELS (4) Total sound power db(a) Total sound pressure db(a) ,2 3, ,7 4,49 35,7 33,1 15,1 4, ,9 4,48 44,3 42,1 17,3 6, ,8 4,42 50,6 56,3 20,5 5, ,3 4,51 59,8 48,3 23,4 5, ,9 4,52 68,3 43,5 27,4 6, ,44 79,8 56,3 30,2 3, ,41 89,2 33,4 DIMENSIONS AND WEIGHTS (5) Length mm. Width mm. Height mm. Weight kg lant (side) cooling exchanger water (in/out) 12/7 C Source (side) heat exchanger water (in/out) 14/30 C 2 lant (side) heating exchanger water (in/out) 40/45 C Source (side) heat exchanger water (in/out) 14/7 C 3 lant (side) cooling exchanger water (in/out) 12/7 C Source (side) heat exchanger water (in/out) 30/35 C lant (side) heating exchanger water (in/out) 40/45 C Source (side) heat exchanger water (in/out) 12/7 C 4 Sound power on the basis of measurements made in compliance with ISO 9614 and Eurovent 8/1 for Eurovent certif ed units; in compliance with ISO 3744 for non-certif ed units Average sound pressure level, at 10 (m.) distance, unit in a free f eld on a ref ective surface; non-binding value obtained from the sound power level 5 Standard configuration - Not available 6 ELCADOC - Ver ERACS2_WQ_0802_3202_201110_EN Ref.: R134a

11 GENERAL TECHNICAL DATA SIZE COOLING (1) Cooling capacity kw Total power input (unit) kw 94, EER 5,87 5,84 5,87 5,82 5,82 ESEER Heat exchanger water flow m³/h 95, Heat exchanger pressure drop ka 26,8 36,6 30,5 37,8 49,1 Source (side) heat exchanger water flow Source (side) heat exchanger pressure drop m³/h ka HEATING (2) Heating capacity kw Total power input (unit) kw CO Heat exchanger water flow m³/h Heat exchanger pressure drop ka /R REFRIGERATION AND HEATING (3) Cooling capacity kw Total power input (unit) kw Heat exchanger water flow m³/h 95, Heat exchanger pressure drop ka 26,8 36,6 30,5 37,8 49,1 Heat recovery thermal capacity kw CUE - Coefficient of useful effect 8,25 8,31 8,42 8,32 8,26 Heat exchanger recovery water flow m³/h lant side heat exchanger recovery pressure drop ka 30,7 41,6 34,2 43,4 55,6 COMRESSORS Number N Number of capacity N Number of circuits N Type of regulation STES STES STES STES STES Minimum capacity steps % Type of refrigerant R134a R134a R134a R134a R134a Refrigerant charge kg Oil charge kg NOISE LEVELS (4) Total sound power db(a) Total sound pressure db(a) ,8 3, , ,7 40,7 4, , ,6 44,0 4, , ,2 49,0 5, , ,4 55,9 6, , ,6 DIMENSIONS AND WEIGHTS (5) Length mm. Width mm. Height mm. Weight kg lant (side) cooling exchanger water (in/out) 12/7 C Source (side) heat exchanger water (in/out) 14/30 C 2 lant (side) heating exchanger water (in/out) 40/45 C Source (side) heat exchanger water (in/out) 14/7 C 3 lant (side) cooling exchanger water (in/out) 12/7 C Source (side) heat exchanger water (in/out) 30/35 C lant (side) heating exchanger water (in/out) 40/45 C Source (side) heat exchanger water (in/out) 12/7 C 4 Sound power on the basis of measurements made in compliance with ISO 9614 and Eurovent 8/1 for Eurovent certif ed units; in compliance with ISO 3744 for non-certif ed units Average sound pressure level, at 10 (m.) distance, unit in a free f eld on a ref ective surface; non-binding value obtained from the sound power level 5 Standard configuration - Not available 7 ELCADOC - Ver ERACS2_WQ_0802_3202_201110_EN Ref.: R134a

12 4. OERATING RANGE lant (side) cold heat exchanger Source (side) heat exchanger lant (side) hot heat exchanger min max min max min max Exch. water (in) ( C) 8 (1) 23 (1) 10 (2) 51 (2) 10 (2) 51 (2) Exch. water (out) ( C) 5 (1) (3) 15 (1) 5 (1) (3) 55 (4) 26 (2) 55 (4) Thermal difference ( C) Limits to exchanger water temperature are valid within the minimum - maximum water f ow range indicated in the Hydraulic Data section. (1) Condenser water temp. 30/35 C (2) Evaporator water (in/out) 12/7 C (3) With temperatures down to -8 C use anti-freeze mixtures. In case of lower temperatures, please contact our Sales Department. (4) Valid for temperature of f uid the evaporator >= -3 C. In case of lower temperatures, please contact our Sales Department. ETHYLENE GLYCOL MIXTURE Ethylene glycol and water mixtures, used as a heat-conveying f uid, cause a variation in unit performance. For correct data, use the factors indicated in the following table. Freezing point ( C) Ethylene glycol percentage by weight 0 12% 20% 30% 35% 40% 45% 50% cf 1 0,985 0,98 0,974 0,97 0,965 0,964 0,96 cq 1 1,02 1,04 1,075 1,11 1,14 1,17 1,2 cdp 1 1,07 1,11 1,18 1,22 1,24 1,27 1,3 cf: cooling capacity correction factor cq: f ow correction factor cdp: pressure drop correction factor For data concerning other kind of anti-freeze solutions (e.g. propylene glycol) please contact our Sales Department. FOULING FACTORS erformances are based on clean condition of tubes (fouling factor =1). For different fouling values, performance should be adjusted using the correction factors shown in the following table. Fouling factors lant (side) cold heat exchanger Source (side) heat exchanger f1 fk1 fx1 f2 fk2 fx2 (m 2 C/W) 4,4 x ,99 1,03 1,03 (m 2 C/W) 0,86 x ,96 0,99 0,99 0,98 1,04 1,04 (m 2 C/W) 1,72 x ,93 0,98 0,98 0,97 1,06 1,06 f1 - f2 : capacity correction factors fk1 - fk2 : compressor power input correction factors fx1 - fx2 : total power input correction factors 8 ERACS2_WQ_0802_3202_201110_GB

13 5. HYDRAULIC DATA 5.1 Water f ow and pressure drop Water f ow in the heat exchangers is given by: Q=x0,86/Dt Q: water f ow (m³/h) Dt: difference between inlet and outlet water temp. ( C) : heat exchanger capacity (kw) ressure drop is given by: Dp=K x Q² /1000 Q: water f ow (m³/h) Dp: pressure drop (ka) K: unit size coeff cient SIZE K Evaporator Condenser Auxiliary heat exchanger With Q min Q max W.c. Q min Q max Q min Q max 2 way K K m 3 /h m 3 /h min m 3 m 3 /h m 3 /h m 3 /h m 3 /h valve With 3 way valve Q min: minimum water f ow admitted to the heat exchanger. Q max: maximum water f ow admitted to the heat exchanger. W.c min: minimum water content admitted in the plant. 9 ERACS2_WQ_0802_3202_201110_GB

14 6. ELECTRICAL DATA Maximum values Size n F.L.I. [kw] C ompres s or F.L.A. [A] L.R.A. [A] F.L.I. [kw] Total unit (1) x32.6 2x55.4 2x x40.5 2x67.1 2x x48.7 2x80.4 2x x51.7 2x91.7 2x x64.3 2x x x70.2 2x x x82.1 2x x x82.1+1x x x x423+1x x x x x x300+1x x x x x x208 2x x x235 2x F.L.A. [A] S.A. [A] F.L.I. Full load power input at max admissible condition F.L.A. Full load current at max admissible condition L.R.A. Locked rotor amperes for single compressor S.A. Inrush current (1) Safety values to be considered when cabling the unit for power supply and line-protections ower supply: 400/3/50 Voltage tolerance: 10% Maximum voltage unbalance: 3% Given the typical operating conditions of units designed for indoor installation, which can be associated (according to reference document IEC 60721) to the following classes: - climatic conditions class AA4: air temperature range from 5 up to 42 C (*) - special climatic conditions negligible - presence of water class AD2: possibility of water dripping inside the technical room - biological conditions class 4B1 and 4C2: negligible presence of corrosive and polluting substances - mechanically active substances class 4S2: locations in areas with sand or dust sources The required protection level for safe operation, according to reference document IEC 60529, is I21 BW (protection against access of external devices with diameter larger than 12 mm and water falling vertically). The unit can be considered I21 CW protected, thus fulfilling the above operating conditions. (*) for the unit s operating limits, see selection limits section 10 ERACS2_WQ_0802_3202_201110_EN

15 7. FULL LOAD SOUND LEVEL SIZE SOUND OWER Octave band [Hz] Total sound level Sound power level db(a) Working conditions lant (side) cooling exchanger water (in/out) 12/7 C Source (side) heat exchanger water (in/out) 14/30 C Sound power on the basis of measurements made in compliance with ISO 9614 and Eurovent 8/1 for Eurovent certif ed units; in compliance with ISO 3744 for non-certif ed units Such certification refers specifically to the sound ower Level in db(a). This is therefore the only acoustic data to be considered as binding. SOUND RESSURE LEVEL SIZE Octave band [Hz] at 10 m Total sound level Sound pressure level db(a) Working conditions lant (side) cooling exchanger water (in/out) 12/7 C Source (side) heat exchanger water (in/out) 14/30 C Average sound pressure level, at 10 (m.) distance, unit in a free f eld on a ref ective surface; non-binding value obtained from the sound power level. Additional soundproofing The sound power and pressure levels are reduced of 14 db(a) when present the accessory integral acoustical enclosure basic and of 18 db(a) when present the accessory integral acoustical enclosure plus. 11 ELCADOC - Ver ERACS2_WQ_0802_3202_201110_EN Ref.: R134a

16 8. DIMENSIONAL DRAWINGS H B A EVAORATOR WATER INLET EVAORATOR WATER OUTLET Size REMARKS: A [mm] DIMENSIONS AND WEIGHTS B [mm] H [mm] [kg] R1 [mm] CLEARANCES (See fol. page) R2 [mm] R3 [mm] R4 [mm] RECOVERY WATER INLET RECOVERY WATER OUTLET WELL/TOWER WATER INLET WELL/TOWER WATER OUTLET MAIN ISOLATOR HANDLER OWER INLET For installation purposes, please refer to the documentation sent after the purchase-contract. This technical data should be considered as indicative. CLIMAVENETA may modify them at any moment. A1 ERACS2_WQ_0802_3202_201002_GB

17 H A B EVAORATOR WATER INLET EVAORATOR WATER OUTLET RECOVERY WATER INLET RECOVERY WATER OUTLET Size REMARKS: A [mm] Dimensions and weights B [mm] H [mm] [kg] R1 [mm] Clearances (See fol. page) R2 [mm] R3 [mm] R4 [mm] WELL/TOWER WATER INLET WELL/TOWER WATER OUTLET LIFTING OINTS MAIN ISOLATOR OWER INLET 3 WAY VALVE For installation purposes, please refer to the documentation sent after the purchase-contract. This technical data should be considered as indicative. CLIMAVENETA may modify them at any moment. A2 ERACS2_WQ_0802_3202_201002_GB

18 SUORTING BASEMENT R1 R2 R4 Warning: Electrical power! R3 INSTRUCTIONS: - Make sure that all the panels are f rmly f xed in place before moving the unit. - Before lifting it, check the weight on the CE label. - Use all, and only, the lifting points provided, - Use slings of equal length, - Use a spread-bar (not included) - Move the unit carefully and avoid abrupt movements. A3 ERACS2_WQ_0802_3202_201002_GB

19 SREADER BAR R4 SUORTING BASEMENT R3 Warning: Electrical power! R1 R2 INSTRUCTIONS: - Make sure that all the panels are f rmly f xed in place before moving the unit. - Before lifting it, check the weight on the CE label. - Use all, and only, the lifting points provided, - Use slings of equal length, - Use a spread-bar (not included) - Move the unit carefully and avoid abrupt movements. A4 ERACS2_WQ_0802_3202_201002_GB

20 EVAORATOR CONDENSER RECOVERY WATER INLET WATER OUTLET WATER INLET WATER OUTLET WATER INLET WATER OUTLET ø ø WITHOUT VALVES 2 WAY VALVE ø 3 WAY VALVE ø WITHOUT VALVES 2 WAY VALVE ø 3 WAY VALVE ø ø ø 0802 UNI ISO 228/1 G 4 B (#) UNI ISO 228/1 G 4 B (#) - DN 50 DN 80 - DN 50 DN 80 UNI ISO 228/1 G 4 B (#) UNI ISO 228/1 G 4 B (#) 1002 UNI ISO 228/1 G 4 B (#) UNI ISO 228/1 G 4 B (#) - DN 50 DN 80 - DN 50 DN 80 UNI ISO 228/1 G 4 B (#) UNI ISO 228/1 G 4 B (#) 1102 UNI ISO 228/1 G 4 B (#) UNI ISO 228/1 G 4 B (#) - DN 65 DN 80 - DN 65 DN 80 UNI ISO 228/1 G 4 B (#) UNI ISO 228/1 G 4 B (#) 1302 FLEXIBLE JOINT 6 (4) FLEXIBLE JOINT 6 (4) - DN 65 N 16 DN100 N 16 - DN 65 N 16 DN100 N 16 FLEXIBLE JOINT 6 (4) FLEXIBLE JOINT 6 (4) 1502 FLEXIBLE JOINT 6 (4) FLEXIBLE JOINT 6 (4) - DN 65 N 16 DN100 N 16 - DN 65 N 16 DN100 N 16 FLEXIBLE JOINT 6 (4) FLEXIBLE JOINT 6 (4) 1702 FLEXIBLE JOINT 6 (4) FLEXIBLE JOINT 6 (4) - DN 65 N 16 DN100 N 16 - DN 65 N 16 DN100 N 16 FLEXIBLE JOINT 6 (4) FLEXIBLE JOINT 6 (4) 1902 FLEXIBLE JOINT 6 (4) FLEXIBLE JOINT 6 (4) FLEXIBLE JOINT 6 (4) FLEXIBLE JOINT 3 (1) FLEXIBLE JOINT 4 (2) FLEXIBLE JOINT 6 (4) FLEXIBLE JOINT 3 (1) FLEXIBLE JOINT 4 (2) FLEXIBLE JOINT 6 (4) FLEXIBLE JOINT 6 (4) 2152 FLEXIBLE JOINT 6 (4) FLEXIBLE JOINT 6 (4) FLEXIBLE JOINT 6 (4) FLEXIBLE JOINT 3 (1) FLEXIBLE JOINT 4 (2) FLEXIBLE JOINT 6 (4) FLEXIBLE JOINT 3 (1) FLEXIBLE JOINT 4 (2) FLEXIBLE JOINT 6 (4) FLEXIBLE JOINT 6 (4) 2502 FLEXIBLE JOINT 6 (4) FLEXIBLE JOINT 6 (4) FLEXIBLE JOINT 6 (4) FLEXIBLE JOINT 4 (2) FLEXIBLE JOINT 5 (3) FLEXIBLE JOINT 6 (4) FLEXIBLE JOINT 4 (2) FLEXIBLE JOINT 5 (3) FLEXIBLE JOINT 6 (4) FLEXIBLE JOINT 6 (4) 2602 FLEXIBLE JOINT 8 (5) FLEXIBLE JOINT 8 (5) FLEXIBLE JOINT 8 (5) FLEXIBLE JOINT 4 (2) FLEXIBLE JOINT 5 (3) FLEXIBLE JOINT 8 (5) FLEXIBLE JOINT 4 (2) FLEXIBLE JOINT 5 (3) FLEXIBLE JOINT 8 (5) FLEXIBLE JOINT 8 (5) 2702 FLEXIBLE JOINT 8 (5) FLEXIBLE JOINT 8 (5) FLEXIBLE JOINT 8 (5) FLEXIBLE JOINT 4 (2) FLEXIBLE JOINT 5 (3) FLEXIBLE JOINT 8 (5) FLEXIBLE JOINT 4 (2) FLEXIBLE JOINT 5 (3) FLEXIBLE JOINT 8 (5) FLEXIBLE JOINT 8 (5) 3202 FLEXIBLE JOINT 8 (5) FLEXIBLE JOINT 8 (5) FLEXIBLE JOINT 8 (5) FLEXIBLE JOINT 4 (2) FLEXIBLE JOINT 5 (4) FLEXIBLE JOINT 8 (5) FLEXIBLE JOINT 4 (2) FLEXIBLE JOINT 5 (4) FLEXIBLE JOINT 8 (5) FLEXIBLE JOINT 8 (5) (#) OTIONAL FLANGED CONNECTIONS DN 100 N16 (1) OTIONAL FLANGED CONNECTIONS DN80 N16 (2) OTIONAL FLANGED CONNECTIONS DN100 N16 (3) OTIONAL FLANGED CONNECTIONS DN125 N 16 (4) OTIONAL FLANGED CONNECTIONS DN 150 N 16 (5) OTIONAL FLANGED CONNECTIONS DN200 N16 A5 ERACS2_WQ_0802_3202_201002_GB

21 09. LEGEND OF IE CONNECTIONS UNI ISO 228/1 UNI ISO 7/1 ipe threads where pressure-tight joints are not made on the threads - Designation, dimensions and tolerances Used terminology: G: ipe threads where pressure-tight joints are not made on the threads A: Close tolerance class for external pipe threads where pressure tight joints are not made on the threads B: Wider tolerance class for external pipe threads where pressure tight joints are not made on the threads Internal threads: G letter followed by thread mark (only tolerance class) External threads: G letter followed by thread mark and by A letter for A class external threads or by B letter for B class external threads ipe threads where pressure-tight joints are made on the threads - Designation, dimensions and tolerances Used terminology: Rp: Internal cylindrical threads where pressure-tight joints are made on the threads Rc: Internal conical threads where pressure-tight joints are made on the threads R: External conical threads where pressure-tight joints are made on the threads Internal cylindrical threads: R letter followed by p letter Internal conical threads: R letter followed by c letter External conical threads: R letter Designation UNI ISO 7/1 - Rp 1 1/2 UNI ISO 7/1 - Rp 2 1/2 UNI ISO 7/1 - Rp 3 UNI ISO 7/1 - R 3 UNI ISO 228/1 - G 4 B DN 80 N 16 Description Internal cylindrical threads where pressure-tight joints are made on the threads, def ned by standard UNI ISO 7/1 Conventional ø: 1 1/2 Internal cylindrical threads where pressure-tight joints are made on the threads, def ned by standard UNI ISO 7/1 Conventional ø: 2 1/2 Internal cylindrical threads where pressure-tight joints are made on the threads, def ned by standard UNI ISO 7/1 Conventional ø: 3 External conical threads where pressure-tight joints are made on the threads, def ned by standard UNI ISO 7/1 Conventional ø: 3 Internal cylindrical threads where pressure-tight joints are not made on the treads, def ned by standard UNI 228/1 B tolerance class for external pipe threads Conventional ø: 4 Flange Nominal Diameter: 80 mm Nominal ressure: 16 bar Note: Conventional diameter value [in inches] identif es short thread designation, based upon the relative standard. All relative values are def ned by standards. As example, here below some values: UNI ISO 7/1 UNI ISO 228/1 Conventional ø 1 1 itch mm mm External ø mm mm Core ø mm mm Thread height mm mm A6 ERACS2_WQ_0802_3202_201110_GB

22 10. CONDENSATION CONTROL DEVICES 2 WAY VALVE Two way servo-motorized valve with steel body. The valve is selected for a thermical drop of 15 C and tested by Climaveneta during the unit s test. recommended for applications with underground and superf cial water, where it s better to work with inverter pumps and modulation of the extracted water f ow. ressure drop is given by: Dp= K x Q 2 /1000 Q: water f ow (m 3 /h) Dp: pressure drop (ka) K: unit size ratio DT 15 C Size K , , , , , , , , , ,50 3 WAY VALVE 3 way modulating valve in grey cast iron with diverting function. The valve is selected for a thermic drop of 5 C and tested by Climaveneta during the unit s test. Recommended for geo-thermal applications, in which constant waterf ow is necessary. ressure drop is given by: Dp= K x Q 2 /1000 Q: water f ow (m 3 /h) Dp: pressure drop (ka) K: unit size ratio DT 5 C Size K , , , , , , , , , , , ,11 B1 ERACS2_WQ_0802_3202_201110_GB

23 11. VARIABLE FLOW SYSTEM (optional) The energy consumption associated with fl uid circulation weighs heavily on the total operating costs of a large installation, especially when the units work at part load, and even more, when they are in stand-by. Under these conditions, although the power absorbed by the compressors and fans is reduced, the power consumed for water circulation remains high. The units permit reduction in system power consumption using inverter driven pumps. Energy savings are considerable and immediately evident, since a Δx reduction on the waterfl ow means an energy saving up to an amount of (Δx) 3. In the most advanced systems (see the simplifi ed model shown in the diagram below), the pumps insisting on the units become the pumps for the entire hydraulic circuit, and this eliminates the need to detach a primary circuit (constant fl ow) on the units and a secondary circuit (variable fl ow) on the plant. This hydraulic separation was forced in the past, since the units weren t designed to properly work with variable fl ow. Now, thanks to the units, plant designers need no longer worry about this limitation. The units have been designed to work with maximum effi ciency even with variable fl ow on the main heat exchangers; all the resources independently adjusts themselves in order to keep the outlet water temperature constant. This important feature simplifi es the systems design and offers advantages in terms of both reductions in consumption and hydraulic circuit sizing. The integration of pumps + inverters in the unit permits signifi cant savings in space, circuit components, and system start-up times. To conclude, this innovative solution gives, beyond energy saving and running cost reduction, even advantages in the initial capital cost of the plant. The plant itself infact, is simplifi ed. Example of a 2-pipe plant with a single hydraulic variable fl ow circuit (pressure transducer and by-pass valve at costumer care) C1 ERACS2_WQ_1602_3222_201110_EN

24 VARIABLE FLOW SYSTEM (optional) 11.1 VF systems: plants designed with a single variable flow hydraulic circuit Traditional plant The two hydraulic circuits of the plant can be recognized: the hot and the cold one. In the traditional solution, both of them are hydraulically splitted in a primary constant fl ow circuit (insisting on the units) and a secondary variable fl ow circuit dedicated to the plant s fi nal utilities. An element of the plant works to decouple the two circuits: when pumps user-side partialize according to the building s requestes, it balances the all system by-passing the exceding fl ow to the unit. The unit manages its own pumps as a function of its state (on/ off) balancing the operating hours between them. On the other side, the plant s inverter-pumps are managed through a differential pressure transducer: it reads the pressure drops variation on the circuit and traduce them in a power signal; this signal reports the percentage of load on the building and determines the pumps modulation. Smart plant In this advanced solution for plant s design, both the cold and hot circuits are variable fl ow circuits. The inverter-pumps insist on the cold and hot heat exchangers and are controlled directly by the unit s W3000 controller. The sophisticated algorithms developed by Climaveneta allow the direct power signals coming from the plant s pressure transducer to be elaborated; this elaboration s result is the pumps and by-pass valves control through voltage signals. The complete control of all resources (compressors, fans, pumps and by-pass valves) ensures the maximum system s effi - ciency together with the highest reliability on the units. Example of a 4-pipe plant with two single hydraulic variable fl ow circuits (pressure transducers and by-pass valves at costumer care) C2 ERACS2_WQ_1602_3222_201110_EN

25 VARIABLE FLOW SYSTEM (optional) The system VF option comprises: - extensions on the controller to read the system s pressure transducer signals (4-20 ma) and the consequent management of pumps and bypass valve (0-10 V signal) - additional pressure transducer as extra safety device. umps, differential pressure transducer on the farest pipe of the plant and by-pass valve are at customer charge. Climaveneta provides only some indications for the plants design, as a function of the minimum waterfl ow on the primary heat exchanger. Minimum waterflow to technical bulletin [m3/h] Kvs Recommended valve Valve Valve motor Byass 19 to VVG41.50 DN50 SKB60 DN50 (2 ) up to VVF31.65 DN65 SKB60 DN65 (2"½) up to VVF31.80 DN80 SKB60 DN80 (3 ) up to VVF31.90 DN100 SKC60 DN100 (4 ) up to VVF31.91 DN125 SKC60 DN125 (5 ) up to VVF31.92 DN150 SKC60 DN150 (6 ) 2-way valve and minimum recommended bypass pipe diameter as a function of the minimum waterfl ow. C3 ERACS2_WQ_1602_3222_201110_EN

26 VARIABLE FLOW SYSTEM (optional) 11.2 VF.D systems: plants designed for variable flow, decoupled, primary and secondary circuits Even in that cases in which is not possible to work with a single variable primary fl ow circuits, or in that situations in which is preferible to mantain decoupled the primary circuits (to the units) and the secondary circuit (to the plants), it s possible the primary fl ow on pumps controlled by the unit. The energy savings are lower than the solution with a unique VF system, but still important expecially when the units are in stand-by and it s possible to reduce the waterfl ow through the unit up to 50%. The VF.D systems can be easily adopted in retrofi tt application, where the chiller is supposed to be replaced but not the plant. Traditional plant The regulation is up to the unit s controller, detecting the delta temperature at the primary heat exchanger: when the building s load decreases, waterfl ow is reduced in order to mantain a fi - xed delta T between the exchangers inlet and outlet. The VF.D system by Climaveneta assures even the waterfl ow balancing between primary and secondary circuit, in order to avoid the fl ow inversion in the decoupling pipe. Smart plant T2 T2 T1 T1 Example of a 4-pipe plant with cold and hot circuits hydraulically separated in a primary and a secondary ones, both of them featuring variable fl ow The system VF.D option comprises: - extensions on the controller to read the temperature probes and to drive properly the inverter-pumps (0-10 V signal) - additional pressure transducer on the heat exchangers as extra safety device. The variable fl ow pumps are at customer care. C4 ERACS2_WQ_1602_3222_201110_EN

27 VARIABLE FLOW SYSTEM (optional) Climaveneta provides in the table below some indications for the plants design, as a function of the nominal waterfl ow on the primary heat exchanger. NOTE: temperature probes are separately supplied Minimum waterflow to technical bulletin [m3/h] Decoupling pipe 25 to 40 2"½ up to 60 3" up to 100 4" up to 150 5" up to 225 6" up to 375 8" Minimum decoupling pipe diameter as a function of the minimum waterfl ow C5 ERACS2_WQ_1602_3222_201110_EN

28 12. HYDRAULIC CONNECTIONS RECOMMENDED rotect the hydraulic circuit with antifreeze when shutting down a charged system for winter. If necessary, drain the water inside the exchangers. It is absolutely essential that, in the presence of dirty and/or aggressive water, an intermediate heat exchanger is placed upstream of the refrigeration system heat exchangers. The connecting pipes must be properly supported so as not to weigh on the unit Hydraulic connections with hot and cold heat exchanger plant side The following must be installed on the heat exchanger hydraulic circuit (see Fig.): Two pressure gauges with a suitable range (inlet - outlet) Two service cocks for the pressure gauges. Air bleed valves to be fi tted to the highest points of the circuit. Two vibration damping joints (inlet - outlet) positioned horizontally. One fl ow switch to be fi tted at the unit outlet in a linear stretch of a length of about 7 times the diameter of the pipe itself. The fl ow switch must be calibrated so as to guarantee a minimum water fl ow to the heat exchangers, not less than the value indicated in the unit bulletin or declared by the supplier. If this value is not available, calibrate the fl ow switch to 70% of the rated water fl ow of the unit (not envisaged for desuperheaters). A calibration valve at the outlet. Two shut-off valves (inlet - outlet). A mechanical fi lter with a maximum mesh size of 1 mm to be fi tted as near as possible to the heat exchanger inlet A drain cock to be fi tted in the lowest point of the hydraulic system. A circulation pump. All other equipment listed in Fig. The directions for installation set out above represent a necessary condition for the validity of the guarantee. However, Climaveneta is willing to examine any different needs, which must in any case be approved before the refrigeration system is started up. A Unit B Tank C Reintegration D Use ressure gauge Shut-off valve Automatic air valve Vibration damping joint 5. Flow switch 6. Calibration valve 7. Shut-off valve 8. Filter 9. Drain valve 10. rimary circuit circulation pump 11. Safety valve 12. Expansion tank D1 ERACS2_WQ_0802_3202_201110_EN

29 Climaveneta S.p.A. Via Sarson 57/c Bassano del Grappa (VI) Italy Tel Fax Climaveneta France 3, Village d Entreprises ZA de la Couronne des rés Avenue de la Mauldre Epone France Tel +33 (0) Fax +33 (0) info@climaveneta.fr Climaveneta Deutschland Rhenus latz, Holzwickede Germany Tel Fax info@climaveneta.de Climaveneta Espana - Top Clima Londres 67, Barcelona Spain Tel Fax topclima@topclima.com Climaveneta Chat Union Refrig. Equipment Co Ltd 88 Bai Yun Rd, udong Xinghuo New dev. zone Shanghai China Tel Fax Climaveneta olska Sp. z o.o. Ul. Sienkiewicza 13A Legionowo oland Tel Fax info@climaveneta.pl Climaveneta India Climate Technologies () LTD #3487, 14th Main, HAL 2nd stage, Indiranagar, Bangalore India Tel Fax sales@climaveneta.in Climaveneta UK LTD Highlands Road, Shirley Solihull West Midlands B90 4NL Tel: +44 (0) Fax: +44 (0) Freephone: response@climaveneta.co.uk