Reversible Chillers and Heat Pumps - LEW SERIES kw

Transcription

1 LEW Technical manual GB Reversible Chillers and Heat Pumps - LEW SERIES kw

2 Page 2 of 56

3 Contents CONTENTS GENERAL DESCRIPTION LEW UNITS PRODUCT CONFIGURATIONS CONFIGURATION AND ACCESSORIES FIELD OF APPLICATION PRODUCT INNOVATION STRUCTURE COOLING CIRCUIT COMPRESSORS HEAT EXCHANGERS DE-SUPERHEATER FOR PARTIAL HEAT RECOVERY (OPTIONAL) UTILITY AND DISSIPATION SIDE CYCLE INVERSION VALVES (OPTIONAL) ELECTRONICALLY CONTROLLED ELECTRIC EXPANSION VALVE OTHER COOLING COMPONENTS ELECTRIC PANEL CONTROL MICROPROCESSOR MAIN UNITS TECHNICAL DATA PERFORMANCE OF LEW C, D, H, W HEAT PUMP UNITS NOISE EMISSION OVERALL DIMENSIONS AND WEIGHT OF THE MAIN UNITS OVERALL DRAWINGS OF THE MAIN UNITS TECHNICAL DATA OF OPTIONAL HYDRONIC MODULES CHARACTERISTIC CURVES OF THE HYDRAULIC PUMPS ASSOCIATED TO THE UNITS OVERALL DIMENSIONS AND WEIGHT OF OPTIONAL HYDRONIC MODULES OVERALL DRAWINGS OF OPTIONAL HYDRONIC MODULES INSTALLATION INSTALLATION CLEARANCE REQUIREMENTS VOLUME OF WATER IN THE SYSTEM OPERATING LIMITS WORKING LIMITS WATER FLOW TO EVAPORATOR CALIBRATION OF CONTROL DEVICES Page 3 of 56

4 Declaration of conformity The declaration of conformity is attached to each machine Page 4 of 56

5 1 General description 1.1 LEW units LEW reversible water chillers and heat pumps are air or process fluid conditioning units, designed for both domestic and industrial use and in operation 24 hours a day. They cover a thermal output range from 40 to 429 kw, guaranteeing a high level thermodynamic performance and a wide range of configuration possibilities, both in accessories and cooling circuit. LEW machines have been built in a fully faired framework to make the assembly extremely silent. They can therefore be installed in open environments without needing to be closed off. The all new new rounded off shape enhances their appearance. The exclusive use of R410A refrigerant and of high quality components in the chiller, hydraulic and electrical parts makes the LEW units state of the art chillers in terms of efficiency, reliability and emitted sound output Product configurations The series of LEW models consists in a wide range of products, meeting all system needs: LEW C water chillers cold water only LEW D water chillers cold water only (interlocked by Dry Cooler or Evaporative turret) LEW H water heat pumps chiller side reversible water LEW W water water only heating heat pumps All the above mentioned versions are available in sizes referred to in the table below. The sizes of the LEW units are expressed in the X coordinates of the table in terms of rated cooling capacity [kw], obtained in conditions with chilled water produced at 7 C and combined with the evaporative turret with dissipation circuit water at 29 inlet and 35 outlet. Table I Table summarising the range of LEW products by size and Efficiency Pack: Sizes: Efficiency Pack 1 Efficiency Pack 2 Efficiency Pack 3 Efficiency Pack 4 F1 F1 F1 F1 F1 F1 F2 F2 F2 F2 F2 F1 F1 F1 F1 F1 F1 F2 F2 F2 F2 F2 F3 F3 F3 F3 F3 F3 F3 F3 F3 F3 F3 F3 F3 F3 The first column of Table I shows the available "Efficiency Packs". These determine the configuration of the cooling circuit. For further details see paragraph 1.3 Cooling circuit. For example, the size LEW develops a 90 kw chiller output and is implemented with Efficiency Pack 2 (two compressors, one cooling circuit). The dimensions of the "Frames" of the units are listed in the cells, by means of reference symbols F1 F2 F3 (with increasing dimensions); all the information concerning the weight of the machines and the dimensions corresponding to each frame is available in paragraph 2.3 "Overall dimensions and weight". All sizes of the LEW series can be implemented with the standard "S" set up or the "L" soundproof set up, covering the compressor and outer panelling with soundproof material. The LEW units are identified with the following symbol: LEW 072 CS Page 5 of 56

6 1 Identification symbol of Hiref Model (e.g.: LEW unit) 2 Unit sizes expressed in rated chilling output x10 [kw] (e.g.: 70 kw) 3 Efficiency Pack: cooling circuit and compressor layout (e.g.: Efficiency Pack 2) 4 Machine version (e.g.: C, Chiller) 5 Machine execution (e.g.: S soundproofing not available) Configuration and accessories List of standard features R410A refrigerant Scroll compressors Galvanised and painted sheet-metal structure Flow switch included Brazed plate heat exchangers Second set point on utility side that can be activated from an external input List of options Version CMP-1 Chiller condensed with well or mains water C Chiller condensed with water from a dry-cooler or evaporative tower D Reversible heat pump H Non-reversible heat pump (hot only) W Execution CMP0 standard S low-noise L 1 - Electric power supply CMP1 400/3/50 + N 0 400/3/50 + Motor circuit breakers control microprocessor and expansion device CMP2 base + electronic expansion valve 0 base + mechanical expansion valve A programmable (LCD display 8x22) + electronic expansion valve B programmable (LCD display 8x22) + mechanical expansion valve C 3 - Partial heat recovery (mandatory condensation control) CMP3 absent 0 de-superheater (40% Pf recovered under normal circumstances) D Not available if Field 4 = Flow rate modulation on source side CMP4 absent 0 condens. control with 0-10V modulated output signal P Not available if Field 2 = 0,A 5 - Flow rate modulation on utility circuit CMP5 absent Remote communication CMP6 absent 0 RS485 serial board (Carel or Modbus protocol) 1 Serial board Lonworks 2 Not available if Field 2 = 0,A GSM modem kit 3 Not available if Field 2 = 0,A Ethernet board (SNMP or BACNET protocol) + clock board 4 Not available if Field 2 = 0,A Ethernet board + clock board + supervision software 5 Not available if Field 2 = 0,A 7 - Vibration isolation CMP7 absent 0 Rubber anti-vibration mounts at unit base G Spring anti-vibration mounts at unit base M 8 - Package CMP8 standard 0 Page 6 of 56

7 wooden cage 1 wooden cage Remote control CMP9 absent 0 Simplified remote control panel 1 Remote display for standard microprocessor 2 Not available if Field 2 = B,C Remote display for programmable microprocessor 3 Not available if Field 2 = 0,A 10 - External insulated hydraulic module separated from the main unit CMP10 No hydraulic module 0 LP utility pump + LP dissipation 1 LP utility pump + modulating LP dissipation 2 Not available if Field 2 = 0,A LP utility pump + HP dissipation 3 LP utility pump + modulating HP dissipation 4 Not available if Field 2 = 0,A HP utility pump + LP dissipation 5 HP utility pump + modulating LP dissipation 6 Not available if Field 2 = 0,A HP utility pump + HP dissipation 7 HP utility pump + modulating HP dissipation 8 Not available if Field 2 = 0,A List of accessories Shunt condensers A Soft-starter kit B Service kit (probe kit for quick diagnostics) C Not available if Field 2 = 0,A Clock board D Not available if Field 2 = 0,A ON-OFF status of compressors E Remote contact for (step-based= power limitation F Not available if Field 2 = 0,A Configurable digital alarms board G Not available if Field 2 = 0,A Pressure gauges H Not available if Field 2 = 0,A G - Four Vic-Taulic joints for quick water IN-OUT connection I Filter cut-off kit (solenoid and cock on liquid line) L Outdoor temperature sensor for set-point compensation M Not available if Field 2 = 0,A Dissipation side water temp. probe for Version = "H" or "W" N Not available if Field 10 = Field of application LEW units are designed for cooling heating water and solutions containing up to 30% glycol (percentage by weight) in civil, industrial and technological air conditioning systems. The units cannot operate outdoors, as the metalwork provides an IP43 insulation. Please contact the technical office for these applications. LEW series units must be used within the operating limits shown in this document or the warranty required by the sales contract will be voided. LEW multifunction machines have 4 water connections associated with two different water circuits for 2 pipe systems: Circuit 1, production of cold or hot water for utility; Circuit 2, production of hot or cold water for dissipation in opposition to the utility; Accordingly, the multifunction units have 2 heat exchangers: Plate heat exchanger 1 with both evaporation and condensation function, intended for the utility circuit; Plate heat exchanger 2 with both evaporation and condensation function, intended for the dissipation circuit; Cooling LEW machine: view of the water connections and of the thermodynamic circuit For the correct direction of the connections, always refer to the dimensional drawing attached with the documentation. Page 7 of 56

8 DISSIPATION UTILITY LEW C machines are designed for cold only production: in the utility circuit only the production of chilled water is envisaged. The LEW H machines are reversible heat pumps: in the utility circuit hot water and chilled water can be produced alternatively. The following points briefly illustrate the operating functions of the LEW C, D, H, W units: Chilling LEW C, D, H units in Chiller mode cool the water to cool down the environment on the utility side, thereby dissipating condensation heat with the water cooled by the dissipation heat exchanger. Heating LEW H, W units in Heat Pump mode heat the water in the condenser to heat the utility side, thereby dissipating the evaporation cooling capacity by means of the water which is heated in the dissipation heat exchanger. In other words, a certain amount of heat is drawn from a thermal source and is then transferred to the utility after it has reached a sufficient thermal level that is suitable for its needs. Page 8 of 56

9 Air conditioning applications often need to be able to dispose of heat to heat up domestic hot water or for post heating control in air treatment facilities where an autonomous Temperature and humidity control will be implemented. The heat required can be drawn from the condensing section of the thermodynamic unit, which is at a higher temperature. If only part of the heat is drawn, a de superheater sends gas sensitive heat to the delivery pipe towards the third thermal source at a higher temperature. Upon specific demand, all cold only units of the LEW series can be equipped with a de superheater for partial heat recovery. The available thermal output that can be used for domestic hot water, for example, depends on the unit's operating conditions. Layout of partial heat recovery circuit Page 9 of 56

10 1.1.4 Product innovation LEW units provide excellent thermodynamic performance and maximum flexibility of use thanks to constant product research. The joint application of scroll compressors, advanced control systems and R410A refrigerant gas achieves compact circuits and high COPs. The possibility of keeping the evaporator on the inside allows you not to add glycol to the water in the system, with clear advantages in terms of thermodynamic performance, preservation from corrosion and respect for the environment. It also makes it possible for all the components requiring maintenance to be installed in an easily accessible space. Chiller units can be applied even when no dissipation source other than air is available: a water Dry Cooler provides thermal exchange with the atmosphere while maintaining a compact sized circuit. For large buildings, air conditioning can be implemented as the floors/zones are sold or rented by installing a LEW unit for each floor in a small size technical room, thus spreading the investment over time. The overall dimensions of the units (less than 90 cm depth in the higher output sizes) make them easy to be installed since they fit through any door. The main innovations which this product presents are summarised in the following list: Option of using water without glycol in the utility circuit Heat pump mode with chiller side cycle inversion Option of even heat pump versions using condensation control Electronically controlled electric expansion valve High COP (Coefficient of performance) of thermodynamic cycle Reduced refrigerant load Option of applying chiller mode even when air is used as dissipation source It occupies less space on the floor plan (specific powers up to 153 kw/m 2 ) Innovative aesthetic features and full safety since units are completely closed No noise on the outside, less noise on the inside due to dual soundproofing in low noise versions. 1.2 Structure All LEW series units have the load bearing base and panelling in galvanised sheet metal painted with polyester powders and polymerised in the oven at 180 C. The unit has an attractive design and when closed all the components are inaccessible. This, along with the extensive use of soundproofing material inside the compartment and around the compressors (available for the low noise version), reduces sound to exceptionally low levels (Lp < 67 db metre for bigger sizes). The hydraulic/chiller connections are envisioned on the right side, when looking at the electrical control board, to reduce the technical space required for installation. All the panels are removable (except for the one on the right, upon which all the hydraulic connections are fitted) making the unit fully accessible even though routine maintenance only needs accessing from the front. 1.3 Cooling circuit The cooling circuit is manufactured in our factory, with top brand components and operators trained, according to Directive 97/23, on all the brazing operations. The range can be configured in the cooling circuit mode (Efficiency Pack) which, depending on the size, can be a dual compressor on a double circuit (Efficiency Pack 1) for a highly redundant system, dual compressor (tandem) on single circuit (Efficiency Pack 2) for greater efficiency in partial loads, three compressors (trio) on single circuit (Efficiency Pack 3) combining economical implementation and partial load efficiency and four compressors (two tandems) on a double circuit (Efficiency Pack 4) for a system which is both redundant and efficient with the reduced load. Page 10 of 56

11 Table II List and graphical representation of the layout of the components in four Efficiency Packs: Efficiency Pack ONE: Efficiency Pack TWO: Efficiency Pack THREE: Efficiency Pack FOUR: Solutions with more than one circuit provide the utmost reliability thanks to redundancy, while those with more than one compressor on a circuit provide partial loads with ideal efficiency, also thanks to increased heat exchange surfaces Compressors Only top international brand Scroll compressors are used on LEW units. Scroll compressors, up to a power output of 182 kw for single circuit, are the best solution in terms of reliability and efficiency. They also provide the lowest amount of sound emissions. Process optimisation, along with a carefully selected intrinsic volumetric compression ratio (RVI), clearly improves the isentropic compression performance and reduces energy losses. The use of a scroll compressor allows low viscosity oils to be used. This, in comparison to higher viscosity oils, reduces thermal resistance at the evaporator. It also increases the evaporation temperature by more than 1.5 C (EER increases by more than 5.5%) compared to other solutions. Compressor motors are protected against overheating, overloads and high delivery gas temperatures. They are mounted on rubber anti vibration mounts, complete with oil charge and inserted in a soundproof compartment with sound absorbing material. Also complete with automatic oil heater to prevent the oil from being diluted by the refrigerant when the compressor stops. NOTE: Scroll compressors, like all air tight compressors, are classified as pressurised containers. The low pressure section, referred to by the PS on the data plate, complies with PED CE 97/ Heat exchangers Only brazed plate heat exchangers are used, made of austenitic stainless steel AISI 316, with AISI 316L connections. These feature a reduced carbon content that favours brazing operations. The brazed plate heat exchanger represents the state of the art in terms of thermal exchange efficiency and allows a strong reduction of the refrigerant load compared to standard solutions. The high level of turbulence generated by internal plate corrugation, along with plate smoothness, makes it difficult for dirt to accumulate or for limescale to build up on the condenser circuit. These heat exchangers also make it possible to use R410A fluid which, thanks to the high level thermal conductivity of its liquid phase and to its azeotropic behaviour, enhances thermal exchange during evaporation. The performances are improved over other methane derivative fluids of the HFC group. Page 11 of 56

12 NOTE: due to thermal insulation the data plate (in compliance with PED CE 97/23) is not legible. However, the serial number of the heat exchanger and the declaration of conformity are both recorded during production and are an integral part of Hiref's archive De-superheater for partial heat recovery (optional) The option of partial heat recovery is implemented with a braze welded plate heat exchanger placed in series on the finned pack condenser and its size limits pressure drops on the refrigerant side to a minimum. All machines configured with heat recovery use as per standard modulating condensation control. To prevent a lack of balance in the cooling circuit, if the water temperature is too low when the recovery starts, the hydraulic recovery circuit is implemented as indicated in the following figure: a low water temperature at recovery would cause a drop in the condensation temperature and therefore an insufficient pressure jump on the expansion valve with the ensuing risk of the safety devices being triggered. TANK DIVERTER RECIRCULAT ION PUMP HEAT The bulb of the 3 way mixer valve is placed at the de superheater exchanger inlet, which by mixing the hot water produced with colder water from the tank allows you to limit the time needed for the system to reach full operating capacity to a few moments. A buffer tank must be placed between the unit and the utility since the demand for hot water and its availability are not simultaneous, because it needs the compressors to be running. It should be pointed out that the heat recovery output is linked to the dispensed cooling output and that, therefore, in partial load situations it is also reduced just the same; this aspect must be taken into consideration for the dimensions of the buffer tank. The partial heat recovery option is supplied only with the de superheater exchanger. The other components of the circuit laid out in the previous figure are not included in the supply Utility and dissipation side cycle inversion valves (optional) When LEW H reversible chillers switch from chiller to heat pump, and vice versa, they perform two cycle inversions: one on the coolant circuit and one on the water circuit. The inversion valve of the water side cycle switches from position A to position B and vice versa by means of an electrical driver without changing the direction of travel for the outside utilities. This allows you to invert the direction of the flow in the heat exchangers, keeping them against the flow in relation to the refrigerant fluid in every operating mode. The water side cycle inversion valve is an optional component. Page 12 of 56

13 Refrigerant side cycle inversion valve Heat transfer fluid side cycle inversion valve Electronically controlled electric expansion valve The electronically controlled valve with external equalisation and built in MOP function is managed by the software and therefore makes cooling circuit operation very efficient, stabilising and decreasing the power absorbed by the system when a sudden thermal load variation occurs. The shutter in the central part of the valve can always slide vertically with an ample stroke allowing variation of the degree of opening of the orifice of the fluid passage. Using this valve reduces compressor energy consumption when the surrounding conditions bring the pressure difference between the evaporator and the air conditioner below 5 bar, thus improving performance. Page 13 of 56

14 1.3.6 Other cooling components Molecular sieve filter dryer Sight glass with humidity indicator One way valves (only reversible heat pump) Liquid receiver marked in compliance with EC Directive 97/23 PED (only reversible heat pumps or units with remote condenser) High and low pressure switches Schrader valves for control and/or maintenance Page 14 of 56

15 Diagram of the dual circuit cold only version (please note: this is a standard layout, refer to the layout enclosed with the unit). To consult the layouts, please refer to the symbols in the following table. Page 15 of 56

16 Diagram of the dual circuit reversible heat pump version (please note: this is a standard layout, refer to the layout enclosed with the unit). Page 16 of 56

17 Reference table for numbering used in layouts Page 17 of 56

18 1.4 Electric panel The electric panel is built and wired in accordance with standard EN The electric panel is accessed from the front of the machine. Before it can be accessed, the unit must be disconnected from the power supply using the main switch, which functions as a door lock. All the remote controls are implemented with low voltage signals at 24 V, powered by an isolation transformer positioned inside the control board. All the control boards have an air circulation system with auxiliary fans. The position of the main switch makes wiring operations in the work site easier. This avoids several difficult operations as well as having to twist the power cords. All the utilities are protected against surges and short circuits. The circuit breaker set up can be configured for any load (optional). Thermal protection, however, is carried out by thermistor chains. These are set in the windings of each electric motor and are controlled by onboard electronics. All machines are standard equipped with a phase sequence relay which inhibits compressor operation if the phase sequence is not carried out: only one direction of rotation is possible for scroll compressors, as well as for the screw and Rotary compressors. The unit is rated IP43 which makes it suitable for outdoor installation. The control board with the open panel maintains an IP20 rating. Inside the electrical control board of the Basic control there are two manual selectors to enable remote switching on off, seasonal changeover (only heat pumps) and to select local or remote control: remote consents are implemented by very low voltage contacts placed on the terminal board Control microprocessor LEW series units have two different microprocessor control levels: Basic Carel µchiller Advanced Carel series pco The latter, in addition to the functions described below, can customise the software to meet all system requests. These include cascade management of the units with step control or cascade logic. The microprocessor on board the unit controls the various operating parameters with an electric panel keypad; Compressor connection/disconnection to maintain the set point of the chiller inlet water T; Alarm management: High / low pressure; Antifreeze / Flow switch; Pump alarm Alarm signals Display of operating parameters Evaporator anti freeze protection Control of maximum number of compressor starts RS232, RS485 serial output control (optional) Incorrect phase sequence (not viewed on display, prevents the compressor from starting) As for remote communication, the controls can be connected to advanced BMS systems. The HSD (HiRef Software Department) structure is capable of assisting customers in integration operations. System interconnectivity capabilities are summarised below: Available serial ports RS232 RS485 Ethernet ( HiWeb board) GSM Modem: with prepaid card and relative antenna on board the machine for autonomous two way control of alarms and/or set point variations Protocols Carel [Built In] Modbus [Built In with Advanced controls] Modbus [With external gateway with Basic controls] LonWorks [Dedicated serial board to be requested when ordering the machine] BACnet [With external gateway] TCP IP [With external gateway] TREND [Dedicated serial board to be requested when ordering the machine] (ref. Microprocessor control manual for further details) Page 18 of 56

19 2 Main units technical data The following chapter provides the technical data for the LEW unit. Performance values are accurately reported and can be interpolated to know specific operating conditions. Table I Technical data of LEW chillers in standard operating conditions RATED TECHNICAL DATA OF LEW WATER CHILLERS@ 12/7 C; 15/30 C Efficiency pack LEW CS / CL Cooling capacity kw Rated absorbed power kw Evaporator side pressure drops kpa Evaporator side flow rate l/h Condenser pressure drops kpa Condenser side flow rate l/h Electrical power supply V/ph/Hz 400 3N 50Hz Scroll compressors / cooling circuits No. 2/2 2/1 2/2 2/1 2/2 2/1 2/2 2/1 2/2 2/1 Victaulic hydraulic connections inches 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 Height mm Length mm Depth mm Maximum current (FLA) A Booster current (LRA) A LRA with soft starter kit A EER Refrigerant load kg RATED TECHNICAL DATA OF LEW WATER CHILLERS@ 12/7 C; 15/30 C Efficiency pack LEW CS / CL Cooling capacity kw Rated absorbed power kw Evaporator side pressure drops kpa Evaporator side flow rate l/h Condenser pressure drops kpa Condenser side flow rate l/h Electrical power supply V/ph/Hz 400 3N 50Hz Scroll compressors / cooling circuits No. 2 / 2 2 / 1 2 / 2 2 / 1 2 / 2 2 / 1 2 / 2 2 / 1 4 / 2 Victaulic hydraulic connections inches 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 Height mm Length mm Depth mm Maximum current (FLA) A Booster current (LRA) A LRA with soft starter kit A EER Refrigerant load kg Page 19 of 56

20 RATED TECHNICAL DATA OF LEW WATER 12/7 C; 15/30 C Efficiency pack LEW CS / CL Cooling capacity kw Rated absorbed power kw Evaporator side pressure drops kpa Evaporator side flow rate l/h Condenser pressure drops kpa Condenser side flow rate l/h Electrical power supply V/ph/Hz 400 3N 50Hz Scroll compressors / cooling circuits No. 2 / 2 2 / 1 4 / 2 2 / 2 2 / 1 4 / 2 4 / 2 4 / 2 Victaulic hydraulic connections inches 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 Height mm Length mm Depth mm Maximum current (FLA) A Booster current (LRA) A LRA with soft starter kit A EER Refrigerant load kg RATED TECHNICAL DATA OF LEW WATER CHILLERS@ 12/7 C; 15/30 C Efficiency pack LEW CS / CL Cooling capacity kw Rated absorbed power kw Evaporator side pressure drops kpa Evaporator side flow rate l/h Condenser pressure drops kpa Condenser side flow rate l/h Electrical power supply V/ph/Hz 400 3N 50Hz Scroll compressors / cooling circuits No. 3 / 1 4 / 2 3 / 1 4 / 2 4 / 2 4 / 2 4 / 2 4 / 2 4 / 2 Victaulic hydraulic connections inches 2 1/2 2 1/ Height mm Length mm Depth mm Maximum current (FLA) A Booster current (LRA) A LRA with soft starter kit A EER Refrigerant load kg Page 20 of 56

21 RATED TECHNICAL DATA OF LEW WATER 12/7 C; 40/45 C 30% glyc. Efficiency pack LEW DS / DL Cooling capacity kw Rated absorbed power kw Evaporator side pressure drops kpa Evaporator side flow rate l/h Condenser pressure drops kpa Condenser side flow rate l/h Electrical power supply V/ph/Hz 400 3N 50Hz Scroll compressors / cooling circuits No. 2 / 2 2 / 1 2 / 2 2 / 1 2 / 2 2 / 1 2 / 2 2 / 1 2 / 2 2 / 1 Victaulic hydraulic connections inches 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 Height mm Length mm Depth mm Maximum current (FLA) A Booster current (LRA) A LRA with soft starter kit A EER ESEER Refrigerant load kg RATED TECHNICAL DATA OF LEW WATER CHILLERS@ 12/7 C; 40/45 C 30% glyc. Efficiency pack LEW DS / DL Cooling capacity kw Rated absorbed power kw Evaporator side pressure drops kpa Evaporator side flow rate l/h Condenser pressure drops kpa Condenser side flow rate l/h Electrical power supply V/ph/Hz 400 3N 50Hz Scroll compressors / cooling circuits No. 2 / 2 2 / 1 2 / 2 2 / 1 2 / 2 2 / 1 2 / 2 2 / 1 4 / 2 Victaulic hydraulic connections inches 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 Height mm Length mm Depth mm Maximum current (FLA) A Booster current (LRA) A LRA with soft starter kit A EER ESEER Refrigerant load kg Page 21 of 56

22 RATED TECHNICAL DATA OF LEW WATER 12/7 C; 40/45 C 30% glyc. Efficiency pack LEW DS / DL Cooling capacity kw Rated absorbed power kw Evaporator side pressure drops kpa Evaporator side flow rate l/h Condenser pressure drops kpa Condenser side flow rate l/h Electrical power supply V/ph/Hz 400 3N 50Hz Scroll compressors / cooling circuits No. 2 / 2 2 / 1 4 / 2 2 / 2 2 / 1 4 / 2 4 / 2 4 / 2 Victaulic hydraulic connections inches 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 Height mm Length mm Depth mm Maximum current (FLA) A Booster current (LRA) A LRA with soft starter kit A EER ESEER Refrigerant load kg RATED TECHNICAL DATA OF LEW WATER CHILLERS@ 12/7 C; 40/45 C 30% glyc. Efficiency pack LEW DS / DL Cooling capacity kw Rated absorbed power kw Evaporator side pressure drops kpa Evaporator side flow rate l/h Condenser pressure drops kpa Condenser side flow rate l/h Electrical power supply V/ph/Hz 400 3N 50Hz Scroll compressors / cooling circuits No. 3 / 1 4 / 2 3 / 1 4 / 2 4 / 2 4 / 2 4 / 2 4 / 2 4 / 2 Victaulic hydraulic connections inches 2 1/2 2 1/ Height mm Length mm Depth mm Maximum current (FLA) A Booster current (LRA) A LRA with soft starter kit A EER ESEER Refrigerant load kg Page 22 of 56

23 Table II Technical data of LEW heat pumps in standard operating conditions RATED TECHNICAL DATA OF LEW HEAT 15/10 C; 40/45 C Efficiency pack LEW HS / HL LEW WS / WL Cooling capacity kw Utility side pressure drops kpa Heat sink pressure drops kpa Heating capacity kw Rated absorbed power kw Evaporator side pressure drops kpa Evaporator side flow rate l/h Condenser pressure drops kpa Condenser side flow rate l/h Electrical power supply V/ph/Hz 400 3N 50Hz Scroll compressors / cooling circuits No. 2/2 2/1 2/2 2/1 2/2 2/1 2/2 2/1 2/2 2/1 Victaulic hydraulic connections inches 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 Height mm Length mm Depth mm Maximum current (FLA) A Booster current (LRA) A LRA with soft starter kit A COP ESEER H version refrigerant load kg W version refrigerant charge kg RATED TECHNICAL DATA OF LEW HEAT 15/10 C; 40/45 C Efficiency pack LEW HS / HL LEW WS / WL Cooling capacity kw Utility side pressure drops kpa Heat sink pressure drops kpa Heating capacity kw Rated absorbed power kw Evaporator side pressure drops kpa Evaporator side flow rate l/h Condenser pressure drops kpa Condenser side flow rate l/h Electrical power supply V/ph/Hz 400 3N 50Hz Scroll compressors / cooling circuits No. 2 / 2 2 / 1 2 / 2 2 / 1 2 / 2 2 / 1 2 / 2 2 / 1 4 / 2 Victaulic hydraulic connections inches 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 Height mm Length mm Depth mm Maximum current (FLA) A Booster current (LRA) A LRA with soft starter kit A COP ESEER H version refrigerant charge kg W version refrigerant charge kg Page 23 of 56

24 RATED TECHNICAL DATA OF LEW HEAT 15/10 C; 40/45 C Efficiency pack LEW HS / HL LEW WS / WL Cooling capacity kw Utility side pressure drops kpa Heat sink pressure drops kpa Heating capacity kw Rated absorbed power kw Evaporator side pressure drops kpa Evaporator side flow rate l/h Condenser pressure drops kpa Condenser side flow rate l/h Electrical power supply V/ph/Hz 400 3N 50Hz Scroll compressors / cooling circuits No. 2 / 2 2 / 1 4 / 2 2 / 2 2 / 1 4 / 2 4 / 2 4 / 2 Victaulic hydraulic connections inches 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 Height mm Length mm Depth mm Maximum current (FLA) A Booster current (LRA) A LRA with soft starter kit A COP ESEER H version refrigerant charge kg W version refrigerant charge kg RATED TECHNICAL DATA OF LEW HEAT 15/10 C; 40/45 C Efficiency pack LEW HS / HL LEW WS / WL Cooling capacity kw Utility side pressure drops kpa Heat sink pressure drops kpa Heating capacity kw Rated absorbed power kw Evaporator side pressure drops kpa Evaporator side flow rate l/h Condenser pressure drops kpa Condenser side flow rate l/h Electrical power supply V/ph/Hz 400 3N 50Hz Scroll compressors / cooling circuits No. 3 / 1 4 / 2 3 / 1 4 / 2 4 / 2 4 / 2 4 / 2 4 / 2 4 / 2 Victaulic hydraulic connections inches 2 1/2 2 1/ Height mm Length mm Depth mm Maximum current (FLA) A Booster current (LRA) A LRA with soft starter kit A COP ESEER H version refrigerant charge kg W version refrigerant charge kg Page 24 of 56

25 2.1 Performance of LEW C, D, H, W heat pump units All the data in the paragraph refers to ΔT = 5 C on the evaporation and condensation side. Pf = chiller power [kw] ; Pa = absorbed power [kw]. In order to calculate the thermodynamic EER and COP factors, take the Pf / Pa ratio. The performance was calculated with different glycol percentages in a solution, even though from a thermodynamic point of view, with up to 30% of glycol in a solution, there is a minor performance drop: nonetheless refer to paragraph 4.1 Use of glycol solutions for further information. Table III: performance of LEW C D H units with cold water production mode. Size LEW 041/2 LEW 051/2 LEW 061/2 LEW 071/2 LEW 081/2 LEW 091/2 LEW 111/2 LEW 131/2 LEW 141/2 LEW 144 LEW 161/2 LEW 164 LEW 181/2 LEW 184 LEW 204 LEW 214 LEW 243 LEW C LEW D LEW H Tcond [ C] 10/30 15/30 20/30 30/35 35/40 40/45 10/30 15/30 20/30 Tev [ C] Pf Pa Pf Pa Pf Pa Pf Pa Pf Pa Pf Pa Pf Pa Pf Pa Pf Pa 20/ / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / Page 25 of 56

26 LEW 244 LEW 283 LEW 284 LEW 314 LEW 344 LEW 374 LEW 424 LEW / / / / / / / / / / / / / / / / / / / / / / / / In the heat pump performance calculation, in 5/0 evaporator conditions, a 10% glycol mixture was used on the dissipation side; in 0/ 5 conditions, a 25% glycol mixture was used. Table IV: performance of LEW H W units in heat pump mode. Tcond [ C] LEW H LEW W 30/35 40/45 50/55 Size Tev [ C] Pf Pa Pf Pa Pf Pa LEW 041/2 LEW 051/2 LEW 061/2 LEW 071/2 LEW 081/2 LEW 091/2 LEW 111/2 LEW 131/2 15/ / / / / / / / / / / / / / / / / / / / / / / / / / / / / / Page 26 of 56

27 LEW 141/2 LEW 144 LEW 161/2 LEW 164 LEW 181/2 LEW 184 LEW 204 LEW 214 LEW 243 LEW 244 LEW 283 LEW 284 LEW 314 LEW 344 LEW 374 LEW 424 LEW 484 5/ / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / Page 27 of 56

28 2.2 Noise emission Table V: sound emissions for LEW Lw models: Sound power Lp: Sound pressure Sizes: Lw [db(a)] Lp 10 m Lp 5 m Standard Version Low Noise Version Standard Version Low Noise Version Standard Version Low Noise Version Overall dimensions and weight of the main units The LEW product range consists of different frames. The overall drawings of the LEW models are reported in the following paragraph. They can be referred to by consulting the identification codes reported in the tables in this paragraph. The tables below report the weights, reference drawings and overall dimensions of all the LEW models. Table VI: weight and reference drawings of the main units of the LEW range with reference to their frames Frame F1 F2 F3 Model Weigh t [kg] CS Chiller Overall Drawing DS Dry Cooler Chiller Weig ht [kg] Overall Drawing HS Heat Pump Weig ht [kg] Overall Drawing WS Hot only Weigh t [kg] Overall Drawing LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF LEW HF HF HF HF Page 28 of 56

29 Table VII: overall dimensions of the frames of the main units (F_) Frame of the main unit Height (H) Width (L) Depth (D) F F F Page 29 of 56

30 2.4 Overall drawings of the main units HF overall drawing Page 30 of 56

31 HF overall drawing Page 31 of 56

32 HF overall drawing Page 32 of 56

33 HF overall drawing Page 33 of 56

34 HF overall drawing Page 34 of 56

35 HF overall drawing Page 35 of 56

36 HF overall drawing Page 36 of 56

37 HF overall drawing Page 37 of 56

38 HF overall drawing Page 38 of 56

39 3 Technical data of optional hydronic modules Hydronic modules, recommended as an optional feature for LEW units, bring together, in just a single, compact and silent solution, the main components of the primary circuit of the hydraulic system served by LEW machines. Each hydraulic module contains both circuits: ON/OFF hydraulic pump Blade type flow switch to prevent ice from forming, which is caused by the evaporation of the refrigerant in the plate heat exchanger. (LEW C D units have a flow switch on the utility side, LEW W H units have a flow switch both on the utility and the source side) Expansion vessel to manage changes in volume affecting the amount of water contained in the LEW unit and the module itself Safety valve (set to 3 bar as standard) The module has its own electric panel, which powers the pumps, protects them with motor overload protections and receives the consent from the LEW units. The power is not supplied by the LEW unit, but directly by the external line. The module is insulated to reduce the sound emissions of the pumps. 3.1 Characteristic curves of the hydraulic pumps associated to the units The graphics displayed in this paragraph show the useful head (net with the internal losses of the units) of the HP pumps and LP pumps in the optional hydronic module. At the nominal flow rates listed in this chapter in Tables I and II, the low pressure LP pumps provide 60 kpa of useful head on the utility side and 70 kpa on the dissipation side. The high pressure HP pumps provide a useful head equal to 140 kpa for both hydraulic circuits. Useful head for LEW 041, 042 pumps on utility side Useful head for LEW 051, 052 pumps on utility side Useful head for LEW 061, 062, 071, 072 pumps on utility side Useful head for LEW 081, 082 pumps on utility side Page 39 of 56

40 Useful head for LEW 091, 092 pumps on utility side Useful head for LEW 111, 112, 131, 132 pumps on utility side Useful head for LEW 141, 142, 144 pumps on utility side Useful head for LEW 161, 162, 164 pumps on utility side Useful head for LEW 181; 182; 184 pumps on utility side Useful head for LEW 204 pumps on utility side Useful head for LEW 214 pumps on utility side Useful head for LEW 243, 244 pumps on utility side Page 40 of 56

41 Useful head for LEW 283, 284 pumps on utility side Useful head for LEW 314 pumps on utility side Useful head for LEW 344 pumps on utility side Useful head for LEW 374 pumps on utility side Useful head for LEW 424 pumps on utility side Useful head for LEW 484 pumps on utility side Useful head for LEW 041, 042 pumps on dissipation side Useful head for LEW 051, 052 pumps on dissipation side Page 41 of 56

42 Useful head for LEW 061, 062 pumps on dissipation side Useful head for LEW 071, 072 pumps on dissipation side Useful head for LEW 081, 082 pumps on dissipation side Useful head for LEW 091, 092 pumps on dissipation side Useful head for LEW 111, 112 pumps on dissipation side Useful head for LEW 131, 132 pumps on dissipation side Useful head for LEW 141, 142 pumps on dissipation side Useful head for LEW 144 pumps on dissipation side Page 42 of 56

43 Useful head for LEW 161, 162, 164 pumps on dissipation side Useful head for LEW 181, 182, 184 pumps on dissipation side Useful head for LEW 204 pumps on dissipation side Useful head for LEW 214 pumps on dissipation side Useful head for LEW 243 pumps on dissipation side Useful head for LEW 244, 283, 284 pumps on dissipation side Useful head for LEW 314 pumps on dissipation side Useful head for LEW 344 pumps on dissipation side Page 43 of 56

44 Useful head for LEW 374 pumps on dissipation side Useful head for LEW 424 pumps on dissipation side Useful head for LEW 484 pumps on dissipation side Page 44 of 56

45 3.2 Overall dimensions and weight of optional hydronic modules The tables below list the weights, reference drawings and overall dimensions of all optional hydronic modules. The overall drawings of the optional modules are reported in the following paragraph. They can be referred to by consulting the identification codes reported the tables in this paragraph. Table VIII: weight and reference drawings of optional modules with reference to the dimensions of the relative main unit and whether or not there is a water side cycle inversion valve. Optional hydronic module with pumps Model Optional module frame Weight [kg] Overall Drawing LEW 041 M1 391 HF LEW 042 M1 391 HF LEW 051 M1 400 HF LEW 052 M1 400 HF LEW 061 M1 400 HF LEW 062 M1 400 HF LEW 071 M1 395 HF LEW 072 M1 395 HF LEW 081 M1 395 HF LEW 082 M1 395 HF LEW 091 M1 399 HF LEW 092 M1 399 HF LEW 111 M1 399 HF LEW 112 M1 399 HF LEW 131 M1 412 HF LEW 132 M1 412 HF LEW 141 M1 412 HF LEW 142 M1 412 HF LEW 161 M1 433 HF LEW 162 M1 433 HF LEW 181 M1 543 HF LEW 182 M1 543 HF LEW 144 M3 423 HF LEW 164 M3 433 HF LEW 184 M3 543 HF LEW 204 M3 559 HF LEW 214 M3 559 HF LEW 243 M3 576 HF LEW 244 M3 587 HF LEW 283 M3 587 HF LEW 284 M3 587 HF LEW 314 M3 614 HF LEW 344 M3 614 HF LEW 374 M3 626 HF LEW 424 M3 626 HF LEW 484 M3 626 HF Table VII: overall dimensions of the frames of the main units (F_) and optional hydraulic modules (M_) used in the LEW range Optional module frame Height (H) Width (L) Depth (D) M M M M Page 45 of 56

46 3.3 Overall drawings of optional hydronic modules HF overall drawing Page 46 of 56

47 HF overall drawing Page 47 of 56

48 HF overall drawing for LEW C units Page 48 of 56

49 HF overall drawing for LEW D W H units Page 49 of 56

50 4 Installation 4.1 Installation clearance requirements The hydraulic connections are all foreseen on the right side of the unit, when looking at the front panel. This way the back of the unit can be against the wall. It is essential to ensure the following service spaces: rear side: min. 0 m electric panel side: at least 1 m to guarantee access for inspections and/or for maintenance of cooling components right side: 1 m to be able to connect the hydraulic piping properly top side: min. 1 m left side: 0.5 m These distances refer to standard versions of LEW units; the same considerations apply to the optional hydronic modules. When installing the unit, for safety purposes, make sure that the room temperature does not exceed 50 C (with unit on or off). 4.2 Volume of water in the system The ON/OFF type compressors work intermittently, since the cooling power required by the utility is not generally the same as that supplied by the compressor. In systems containing little water, in which the thermal inertia is low, verify that the water content of the delivery section (to users) satisfies the equation below: V Cc Sh Ns V = water content in user section [m3] Sh = specific heat of fluid [J/(kg/ C)] e.g [J/(kg/ C)] for water = density of fluid [kg/m3] e.g [kg/m3] for water D = minimum time between 2 compressor restarts [s] e.g. 120 [s] DT = admissible differential on water T [ C] e.g. 4 [ C] Cc = Cooling Capacity [W] Ns = N of capacity control steps Page 50 of 56

51 Inlet water T Inertial Tank Ts C Outlet water T A standard feature of LEW units is a device to control the water flow rate (blade-type flow switch supplied). Any tampering with this device will immediately invalidate the warranty. We recommend installing a metal net filter on the water inlet piping. Warning: Never perform hydraulic connection operations with open flames near or inside the unit. Page 51 of 56

52 5 Operating limits This paragraph reports a list of operating limits for the LEW chillers relating to the water outlet temperature on the utility side and water inlet temperature at the dissipation exchanger. Applications with water T exceeding the limits indicated they must run with R134a refrigerant (available upon request). You can contact your local Agent for related details. Operating range of LEW units in cooling mode and heat pump mode: Water can be produced at temperatures below 5 C (up to 10 C) using glycol solutions. This lowers the freezing point as shown in the following table: Minimum temperature of produced water Percentage in weight of ethylene glycol Freezing temperature of mixture 5 C 2 C 1 C 5 C 10 C 0 % 10 % 15% 25 % 30 % 0 C 4 C 8 C 14 C 18 C If the water produced is below 0 C, a special insulation needs to be applied to the cold pipes to prevent ice from forming. This is why applications with temperatures produced below 0 C must be considered as special applications. The useful head supplied by the pump, at the same volumetric water flow, depends on the glycol percentage as shown in the following table: Percentage in weight of ethylene glycol Reduction percentage of useful flow rate 0 % 10 % 15% 25 % 30 % 0 % 5 % 8 % 12 % 15 % Performance loss of the thermodynamic circuit is negligible up to concentrations of 30% glycol, in weight. Page 52 of 56