HF61G00027 LEW-0-PD-GB-06 HIREF · 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

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Reversible Chillers and Heat Pumps - LEW SERIES

40 - 420 kW

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Contents

CONTENTS ...................................................................................................................................................... 3

1 GENERAL DESCRIPTION .................................................................................................................. 5

1.1 LEW UNITS .............................................................................................................................................. 5 1.1.1 PRODUCT CONFIGURATIONS .................................................................................................................. 5 1.1.2 CONFIGURATION AND ACCESSORIES .................................................................................................... 6 1.1.3 FIELD OF APPLICATION ........................................................................................................................... 7 1.1.4 PRODUCT INNOVATION ......................................................................................................................... 10 1.2 STRUCTURE ............................................................................................................................................. 10 1.3 COOLING CIRCUIT ................................................................................................................................ 10 1.3.1 COMPRESSORS ...................................................................................................................................... 11 1.3.2 HEAT EXCHANGERS ............................................................................................................................... 11 1.3.3 DE-SUPERHEATER FOR PARTIAL HEAT RECOVERY (OPTIONAL) ........................................................ 12 1.3.4 UTILITY AND DISSIPATION SIDE CYCLE INVERSION VALVES (OPTIONAL) ...................................... 12 1.3.5 ELECTRONICALLY CONTROLLED ELECTRIC EXPANSION VALVE ......................................................... 13 1.3.6 OTHER COOLING COMPONENTS ........................................................................................................... 14 1.4 ELECTRIC PANEL .................................................................................................................................... 18 1.4.1 CONTROL MICROPROCESSOR ............................................................................................................... 18

2 MAIN UNITS TECHNICAL DATA ................................................................................................. 19

2.1 PERFORMANCE OF LEW C, D, H, W HEAT PUMP UNITS ............................................................ 25 2.2 NOISE EMISSION .................................................................................................................................. 28 2.3 OVERALL DIMENSIONS AND WEIGHT OF THE MAIN UNITS ........................................................ 28 2.4 OVERALL DRAWINGS OF THE MAIN UNITS ..................................................................................... 30

3 TECHNICAL DATA OF OPTIONAL HYDRONIC MODULES ............................................. 39

3.1 CHARACTERISTIC CURVES OF THE HYDRAULIC PUMPS ASSOCIATED TO THE UNITS ........... 39 3.2 OVERALL DIMENSIONS AND WEIGHT OF OPTIONAL HYDRONIC MODULES ............................ 45 3.3 OVERALL DRAWINGS OF OPTIONAL HYDRONIC MODULES ......................................................... 46

4 INSTALLATION .................................................................................................................................... 50

4.1 INSTALLATION CLEARANCE REQUIREMENTS .................................................................................. 50 4.2 VOLUME OF WATER IN THE SYSTEM ................................................................................................. 50

5 OPERATING LIMITS .......................................................................................................................... 52

5.1 WORKING LIMITS ................................................................................................................................. 53 5.2 WATER FLOW TO EVAPORATOR ......................................................................................................... 53

6 CALIBRATION OF CONTROL DEVICES ................................................................................... 54

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Declaration of conformity

The declaration of conformity is attached to each machine

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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.

1.1.1 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: 040 050 060 070 080 090 110 130 140 160 180 200 210 240 280 310 340 370 420 480

Efficiency Pack 1

F1 F1 F1 F1 F1 F1 F2 F2 F2 F2 F2

Efficiency Pack 2

F1 F1 F1 F1 F1 F1 F2 F2 F2 F2 F2

Efficiency Pack 3

F3 F3

Efficiency Pack 4

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 2 090” 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

1 2 3 4 5

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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)

1.1.2 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 2

2 - 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 = 0

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 0

6 - 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

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wooden cage 1

wooden cage 2

9 - 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 = 1.2

1.1.3 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.

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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.

DISSIPATION

UTILITY

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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

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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/m2) 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‐A @1 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.

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Table II – List and graphical representation of the layout of the components in four Efficiency Packs:

Efficiency Pack ONE:Efficiency Pack ONE:

Efficiency Pack TWO:Efficiency Pack TWO:

Efficiency Pack THREE:Efficiency Pack THREE:

Efficiency Pack FOUR:Efficiency Pack FOUR: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.

1.3.1 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 97/23.

1.3.2 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.

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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.

1.3.3 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.

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.

1.3.4 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.

TANK

DIVERTER RECIRCULATION PUMP H

EAT

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Refrigerant side cycle inversion valve Heat‐transfer fluid side cycle inversion valve

1.3.5 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.

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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

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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.

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

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Reference table for numbering used in layouts

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1.4 Electric panel The electric panel is built and wired in accordance with standard EN 60204‐1. 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.

1.4.1 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)

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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 1 2 1 2 1 2 1 2 1 2

LEW CS / CL 41 42 51 52 61 62 71 72 81 82 Cooling capacity kW 51.9 51.1 60.2 60.1 69.1 69.2 77.9 77.9 89.1 89.1

Rated absorbed power kW 9.3 8.7 11.2 11.2 12.4 12.4 14.3 14.3 15.9 15.9

Evaporator‐side pressure drops kPa 38 37 51 51 40 40 50 50 39 39

Evaporator‐side flow rate l/h 8933 8791 10360 10344 11888 11897 13406 15326 15330 15326

Condenser pressure drops kPa 7 7 9 9 12 12 15 15 18 18

Condenser‐side flow rate l/h 3483 3402 4062 4057 4637 4639 5246 5972 5974 5972

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 1594 1594 1594 1594 1594 1594 1594 1594 1594 1594

Length mm 1174 1174 1174 1174 1174 1174 1174 1174 1174 1174

Depth mm 772 772 772 772 772 772 772 772 772 772

Maximum current (FLA) A 30.0 30.0 37.0 37.0 40.0 40.0 46.0 46.0 50.0 50.0

Booster current (LRA) A 111.0 111.0 156.0 156.0 157.0 157.0 164.0 164.0 176.0 176.0

LRA with soft‐starter kit A 73.0 73.0 83.0 83.0 102.0 102.0 107.0 107.0 117.0 117.0

EER 5.75 6.05 5.46 5.45 5.72 5.73 5.54 5.54 5.76 5.76

Refrigerant load kg 6 5 6 5 6 6 7 7 7 7


Efficiency pack 1 2 1 2 1 2 1 2 4

LEW CS / CL 91 92 111 112 131 132 141 142 144

Cooling capacity kW 99.3 99.3 118.9 118.9 135.6 135.5 157.2 157.3 156.9

Rated absorbed power kW 18.0 18.0 21.3 21.3 24.6 24.6 27.9 27.9 28.8

Evaporator‐side pressure drops kPa 48 48 39 39 50 50 47 47 47

Evaporator‐side flow rate l/h 17075 17077 20448 20454 23326 23309 27039 27061 26983

Condenser pressure drops kPa 22 22 30 30 38 38 19 19 19

Condenser‐side flow rate l/h 6674 6675 7978 7980 9118 9112 10532 10538 10563


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 1594 1594 1594 1594 1594 1594 1594 1594 1854

Length mm 1174 1174 1674 1674 1674 1674 1674 1674 2374

Depth mm 772 772 772 772 772 772 772 772 772

Maximum current (FLA) A 61.0 61.0 70.0 71.0 79.0 79.0 91.0 91.0 92.0

Booster current (LRA) A 203.0 203.0 238.0 275.0 244.0 244.0 289.0 289.0 197.0

LRA with soft‐starter kit A 137.0 137.0 176.0 210.0 182.0 182.0 224.0 224.0 140.0

EER 5.60 5.60 5.71 5.71 5.58 5.58 5.73 5.74 5.54

Refrigerant load kg 8 8 12 12 13 12 15 13 15

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Efficiency pack 1 2 4 1 2 3 4 4

LEW CS / CL 161 162 164 181 182 184 204 214

Cooling capacity kW 174.9 175.1 176.2 204.5 204.8 198.9 219.1 235.1

Rated absorbed power kW 32.1 32.1 31.9 37.9 37.9 36.4 39.3 42.7

Evaporator‐side pressure drops kPa 51 51 52 54 54 51 51 57

Evaporator‐side flow rate l/h 30076 30113 30302 35180 35218 34211 37680 40444

Condenser pressure drops kPa 23 23 23 30 31 29 28 33

Condenser‐side flow rate l/h 11771 11783 11838 13788 13803 13386 14703 15805


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 1594 1594 1854 1594 1594 1854 1854 1854

Length mm 1674 1674 2374 1674 1674 2374 2374 2374

Depth mm 772 772 772 772 772 877 877 877

Maximum current (FLA) A 102.0 102.0 100.0 116.0 116.0 122.0 132.0 142.0

Booster current (LRA) A 298.0 298.0 211.0 361.0 361.0 250.0 321.0 328.0

LRA with soft‐starter kit A 233.0 233.0 152.0 278.0 278.0 184.0 256.0 263.0

EER 5.53 5.54 5.59 5.46 5.47 5.54 5.64 5.55

Refrigerant load kg 15 15 15 16 15 22 22 22



LEW CS / CL 243 244 283 284 314 344 374 424 484









Victaulic hydraulic connections inches 2 1/2 2 1/2 3 3 3 3 3 3 3

Height mm 1854 1854 1854 1854 1854 1854 1854 1854 1854

Length mm 2374 2374 2374 2374 2374 2374 2374 2374 2374

Depth mm 877 877 877 877 877 877 877 877 877




EER 5.68 5.86 5.68 5.75 5.49 5.41 5.57 5.60 5.63


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RATED TECHNICAL DATA OF LEW WATER CHILLERS@ 12/7°C; 40/45°C 30% glyc.


LEW DS / DL 41 42 51 52 61 62 71 72 81 82 Cooling capacity kW 43.06 43.06 50.6 50.6 57.9 57.8 65.7 65.8 75.5 75.5







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


Height mm 1594 1594 1594 1594 1594 1594 1594 1594 1594 1594

Length mm 1174 1174 1174 1174 1174 1174 1174 1174 1174 1174

Depth mm 772 772 772 772 772 772 772 772 772 772




EER 3.36 3.36 3.33 3.33 3.45 3.44 3.37 3.37 3.51 3.51

ESEER 5.61 6.04 5.39 5.78 5.73 6.11 5.59 6.01 5.89 6.25

Refrigerant load kg 4 4 4 5 5 5 5 6 7 7



LEW DS / DL 91 92 111 112 131 132 141 142 144










Height mm 1594 1594 1594 1594 1594 1594 1594 1594 1854

Length mm 1174 1174 1674 1674 1674 1674 1674 1674 2374

Depth mm 772 772 772 772 772 772 772 772 772




EER 3.40 3.41 3.54 3.53 3.45 3.46 3.49 3.49 3.45

ESEER 5.81 6.25 6.05 6.48 6.00 6.43 5.90 6.17 6.09


Page 22 of 56 RG66006951‐Rev.01



LEW DS / DL 161 162 164 181 182 184 204 214

Cooling capacity kW 149.4 149.5 150 175 174.9 169.6 187 201.2

Rated absorbed power kW 42.6 42.6 75.1 50 50 48.6 52.7 57.3








Height mm 1594 1594 1854 1594 1594 1854 1854 1854

Length mm 1674 1674 2374 1674 1674 2374 2374 2374

Depth mm 772 772 772 772 772 877 877 877




EER 3.51 3.51 2.00 3.50 3.50 3.49 3.55 3.51

ESEER 5.80 6.17 6.24 5.84 6.29 6.33 6.46 6.44

Refrigerant load kg 15 13 15 16 15 22 24 27



LEW DS / DL 243 244 283 284 314 344 374 424 484










Height mm 1854 1854 1854 1854 1854 1854 1854 1854 1854

Length mm 2374 2374 2374 2374 2374 2374 2374 2374 2374

Depth mm 877 877 877 877 877 877 877 877 877




EER 3.64 3.66 3.54 3.55 3.46 3.44 3.48 3.54 3.22

ESEER 6.37 6.62 6.34 6.21 6.15 6.13 6.20 6.45 6.56


Page 23 of 56 RG66006951‐Rev.01

Table II – Technical data of LEW heat pumps in standard operating conditions

RATED TECHNICAL DATA OF LEW HEAT PUMPS @ 15/10°C; 40/45°C


LEW HS / HL – LEW WS / WL 41 42 51 52 61 62 71 72 81 82 Cooling capacity kW 43.31 42.7 50.85 50.86 58.19 58.13 66.09 66.14 75.74 75.81

Utility side pressure drops kPa 26 25 36 36 36 36 35 35 27 27

Heat sink pressure drops kPa 39 38 55 55 41 41 54 54 41 41

Heating capacity kW 60.17 59 70.91 70.9 80.5 80.52 91.69 91.72 104.38 104.38







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


Height mm 1594 1594 1594 1594 1594 1594 1594 1594 1594 1594

Length mm 1174 1174 1174 1174 1174 1174 1174 1174 1174 1174

Depth mm 772 772 772 772 772 772 772 772 772 772




COP 4.79 4.93 4.63 4.63 4.76 4.76 4.71 4.71 4.94 4.93

ESEER 5.61 6.04 5.39 5.78 5.73 6.11 5.59 6.01 5.89 6.25

H version refrigerant load kg 8 6 8 7 8 7 9 8 10 9

W version refrigerant charge kg 5 4 5 4 5 4 7 6 7 6



LEW HS / HL – LEW WS / WL 91 92 111 112 131 132 141 142 144


Utility side pressure drops kPa 34 34 30 30 36 36 34 34 34

Heat sink pressure drops kPa 51 51 42 42 54 54 50 50 51

Heating capacity kW 116.87 116.89 140.29 140.31 160.24 160.28 184.3 184.18 185.49









Height mm 1594 1594 1594 1594 1594 1594 1594 1594 1854

Length mm 1174 1174 1674 1674 1674 1674 1674 1674 2374

Depth mm 772 772 772 772 772 772 772 772 772




COP 4.79 4.79 4.95 4.95 4.81 4.82 4.86 4.86 4.79

ESEER 5.81 6.25 6.05 6.48 6.00 6.43 5.90 6.17 6.09

H version refrigerant charge kg 13 12 22 21 22 21 22 21 41

W version refrigerant charge kg 7 6 10 9 12 10 12 12 24

Page 24 of 56 RG66006951‐Rev.01



LEW HS / HL – LEW WS / WL 161 162 164 181 182 184 204 214

Cooling capacity kW 149.21 149.37 149.82 177.59 177.67 172.56 187.01 204.32

Utility side pressure drops kPa 38 38 38 33 33 32 37 35

Heat sink pressure drops kPa 56 56 57 49 49 47 56 53

Heating capacity kW 206.27 206.31 207.12 244.39 244.28 237.95 257.95 281.31

Rated absorbed power kW 42.83 42.82 43.08 49.94 49.95 48.24 52.89 57








Height mm 1594 1594 1854 1594 1594 1854 1854 1854

Length mm 1674 1674 2374 1674 1674 2374 2374 2374

Depth mm 772 772 772 772 772 877 877 877




COP 4.78 4.79 4.78 4.90 4.89 4.94 4.85 4.92

ESEER 5.80 6.17 6.24 5.84 6.29 6.33 6.46 6.44

H version refrigerant charge kg 25 22 41 31 28 42 42 43

W version refrigerant charge kg 13 12 25 15 13 25 25 27



LEW HS / HL – LEW WS / WL 243 244 283 284 314 344 374 424 484


Utility side pressure drops kPa 38 25 29 30 36 35 34 33 35

Heat sink pressure drops kPa 57 33 41 43 53 51 51 50 55

Heating capacity kW 318.09 329.52 367.31 371.69 413.83 451.62 487.71 538.48 617.22









Height mm 1854 1854 1854 1854 1854 1854 1854 1854 1854

Length mm 2374 2374 2374 2374 2374 2374 2374 2374 2374

Depth mm 877 877 877 877 877 877 877 877 877




COP 4.97 5.12 4.93 4.95 4.81 4.84 4.85 4.91 4.87

ESEER 6.37 6.62 6.34 6.21 6.15 6.13 6.20 6.45 6.56

H version refrigerant charge kg 41 44 43 53 55 55 55 55 55

W version refrigerant charge kg 25 28 25 28 31 31 31 31 31

Page 25 of 56 RG66006951‐Rev.01

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.

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

Size Tev [°C]

Pf Pa Pf Pa Pf Pa Pf Pa Pf Pa Pf Pa Pf Pa Pf Pa Pf Pa

LEW 041/2

20/15 66.8 9.4 66.5 9.5 66.1 9.6 61.6 10 58.5 11.0 55.7 13 65.9 8.6 66.5 9.5 65.2 8.9

15/10 57.4 9.3 57.1 9.4 56.8 9.5 52.8 9.9 50.0 11.0 47.1 12.1 56.5 8.5 56.2 8.7 56.1 8.9

10/5 49 9.1 48.7 9.2 48.4 9.3 45.5 10.5 43.0 11.6 40.5 12.6 49.0 9.1 48.7 9.2 48.4 9.3

LEW 051/2

20/15 77.9 11.5 77.6 11.7 77 11.8 72.8 13.2 69.1 14.3 65.3 15.6 78.1 11.5 77.6 11.7 77.1 11.8

15/10 66.7 11.2 66.3 11.4 66 11.5 62.4 12.8 59.2 14.1 55.9 15.3 66.7 11.2 66.3 11.4 66.0 11.5

10/5 56.5 11 56.22 11.1 55.8 11.2 53 12.5 50.4 13.8 47.7 15 56.5 11.0 56.2 11.1 55.8 11.2

LEW 061/2

20/15 89 12.6 88.7 12.7 87.8 12.9 83.7 14.2 79.3 15.6 74.8 17.1 89.8 12.4 89.2 12.5 88.7 12.7

15/10 76.4 12.4 76.2 12.5 75.5 12.7 71.8 14 67.9 15.5 64 16.9 76.9 12.2 76.7 12.3 75.9 12.5

10/5 65.2 12.1 64.9 12.3 64.4 12.5 61.2 13.7 57.8 15.2 54.4 16.6 65.6 11.9 65.3 12.1 64.7 12.3

LEW 071/2

20/15 99.7 14.4 99 14.6 98.5 14.8 94.1 16.3 89.6 17.9 84.5 19.7 100.4 14.1 99.8 14.3 99.3 14.6

15/10 85.8 14.3 85.3 14.4 84.9 14.6 81 16.1 76.9 17.8 72.7 19.5 86.6 14.1 86.1 14.2 85.5 14.4

10/5 73.7 14 73.2 14.2 72.6 14.4 69.3 15.9 65.7 17.6 62.1 19.3 74.3 13.8 73.8 14 73.1 14.2

LEW 081/2

20/15 114.4 16.2 113.8 16.4 112.7 16.7 108.7 18 103.2 19.7 97.3 21.7 116.1 15.7 115.6 15.9 144.8 16.1

15/10 98.5 15.8 97.8 16.1 97.1 16.3 93.4 17.6 88.4 19.5 83.4 21.4 100.0 15.2 99.3 15.5 98.3 15.8

10/5 83.9 15.6 83.6 15.7 83 16 79.8 17.3 75.4 19.3 71 21.3 85.1 15.2 84.8 15.3 83.9 15.7

LEW 091/2

20/15 128.4 18 127.4 18.3 126.4 18.5 121.6 20.2 115.5 22.2 108.9 24.6 130.3 17.4 129.8 17.6 128.7 17.9

15/10 109.8 17.9 109.1 18.1 108.3 18.5 104.1 20 98.6 22.2 93 24.4 111.8 17.3 111.1 17.5 109.9 18.0

10/5 93.6 17.8 93 18 92 18.3 88.4 19.9 83.7 22.1 78.9 24.3 95.3 17.2 94.7 17.4 93.3 17.8

LEW 111/2

20/15 153.3 21.5 152.1 21.8 151.3 22.2 146.7 23.5 139.3 26.0 131.1 28.8 157.1 20.4 156.2 20.6 155.2 20.9

15/10 131.7 21.2 130.6 21.5 129.4 21.9 125.8 23.3 119.1 26.0 112.4 28.6 135.3 19.9 134.2 20.3 132.2 20.9

10/5 112.3 20.9 111.4 21.3 110.7 21.6 107.1 23 101.3 25.7 95.4 28.4 115.3 19.6 114.4 20.1 113.0 20.6

LEW 131/2

20/15 174.2 25 172.8 25.4 171.5 25.8 166.8 27.3 158.3 30.2 149.1 33.4 178.8 23.7 178 24 176.6 24.3

15/10 149.7 24.5 148.8 24.9 147.6 25.3 143.2 26.9 135.5 30.1 127.8 33.2 153.8 23.0 152.9 23.5 150.8 24.1

10/5 128 24.1 126.9 24.5 125.9 25 122 26.7 115.4 29.9 108.8 33 131.8 22.6 130.7 23.1 128.8 23.8

LEW 141/2

20/15 201.8 28.1 201.1 28.4 199.3 28.9 191.6 31.4 180.0 34.5 171.4 38.1 204.8 27.3 203.7 27.6 202.4 28.0

15/10 173.8 27.7 172.7 28 171.6 28.6 164.6 31 155.9 34.5 147.1 37.9 176.3 26.9 175.2 27.2 173.5 27.9

10/5 148.6 27.4 147.7 27.7 146.6 28.2 140.7 30.7 132.9 34.2 125.1 37.7 150.4 26.6 149.5 26.9 148.0 27.5

LEW 144

20/15 201.1 29 199.9 29.4 198.2 29.9 190.7 32.4 181.4 35.7 171.5 39.2 203.4 28.1 202.4 28.4 201.4 28.9

15/10 173.1 28.6 172.5 29 171 29.5 164.3 32 156.0 35.4 147.6 38.7 175.2 27.7 174.6 28.1 172.6 28.7

10/5 148.4 28.23 147.3 28.7 146.5 29 140.6 31.5 133.2 34.9 125.8 38.2 150.4 27.3 149.3 27.8 148.1 28.2

LEW 161/2

20/15 224.7 32 224 32.4 222.1 33 214.9 35.3 204.4 38.8 193.1 42.7 228.2 31.0 227.3 31.3 225.6 31.8

15/10 193.6 31.7 224.7 32.2 190.8 32.7 184.7 35 175.1 38.7 165.4 42.4 164.1 30.6 195.3 31.1 167.8 31.8

10/5 165.4 27.4 164.4 32 163.2 32.4 157.8 34.8 149.2 38.6 140.5 42.3 167.6 26.3 166.6 30.8 164.9 31.4

LEW 164

20/15 226.4 32.6 225.1 33 223.6 33.5 216.2 35.8 234.2 43.9 193.7 43.2 229.6 31.6 228.5 31.9 227.1 32.4

15/10 195.1 31.8 193.7 32.3 192.2 32.8 185.6 35.1 175.9 38.9 166.1 42.7 198.0 30.7 196.6 31.2 194.5 31.9

10/5 166.3 31.3 165.3 31.7 164.4 32 158.5 34.6 149.9 38.5 141.2 42.4 168.9 30.1 167.9 30.5 166.4 31.0

LEW 181/2

20/15 263.3 38 261.3 38.6 258.9 39.4 251.6 41.7 238.9 45.9 225.3 50.4 272.0 36.0 270.5 36.5 269.0 37.0

15/10 226.5 37.6 224.7 38.2 222.6 38.9 216.4 41.2 204.9 45.6 193.3 49.9 234.6 35.4 232.9 36.1 228.9 37.1

10/5 193.6 37.2 192.4 37.7 190.5 38.4 185.2 40.7 175.0 45.1 164.7 49.4 200.2 35.1 199.1 35.7 195.6 36.7

LEW 184

20/15 256.9 36.3 255.3 36.7 253.6 37.4 246.3 39.8 234.2 43.9 220.8 48.5 266.4 34.3 265.2 34.7 263.3 35.2

15/10 220.5 36 219.1 36.5 217.5 37.2 210.5 39.5 199.6 43.6 188.4 48.3 228.4 34.2 227.2 34.6 225.4 35.1

10/5 187.5 35.8 186.7 36.2 185.1 36.9 179.3 39.2 169.5 43.5 159.8 48.1 194.3 34 193.8 34.4 192.4 34.9

LEW 204

20/15 282.7 39.4 280.5 40.1 278.3 40.7 270.4 43.2 256.9 47.7 242.5 52.7 288.5 37.6 286.8 38.1 285.3 38.7

15/10 242.2 39 240.8 39.6 238.5 40.4 231.8 42.8 219.3 47.7 206.8 52.5 247.6 40.0 246.2 40.6 242.7 41.2

10/5 206.5 38.6 205.2 39.2 203.5 39.8 197.1 42.4 186.6 47.3 176 52.2 211.2 36.7 209.9 37.4 207.1 38.3

LEW 214

20/15 303.4 43 302.3 43.5 299.4 44.3 290.9 47 275.6 51.9 260.8 57.3 315.1 40.7 313.2 41.2 311.7 41.8

15/10 260.9 42.3 259.2 42.9 256.7 43.7 249.7 46.4 236.3 51.7 222.8 57 270.5 39.9 269 40.6 264.2 41.7

10/5 222.7 47 221.3 42.4 219 43.2 212.6 46 200.8 51.4 189 56.8 230.6 44.3 229.4 40.1 225.2 41.2

LEW 243

20/15 344.1 47.7 356 49.5 339.5 49.2 332.3 52.7 316.1 57.9 298.5 63.7 353.9 45.8 352.4 46.3 350.2 47.0

15/10 295.9 47.4 294.2 48 292 48.8 285.8 52.3 271.0 57.9 256.1 63.4 305.0 45.3 303.4 46 299.1 47.1

10/5 252.7 47 251.3 47.6 249.4 48.4 244.2 51.9 231.1 57.5 218 63 260.7 44.9 259.4 45.6 255.6 46.7

Page 26 of 56 RG66006951‐Rev.01

LEW 244

20/15 358.8 48.7 402.9 57.6 353.6 50.4 344.8 54 327.5 59.6 309.1 65.9 370.3 46.9 368.1 47.4 365.3 48.1

15/10 308.2 47.8 307 48.4 304 49.3 296.7 53.1 281.1 59.3 265.5 65.4 318.0 45.6 317 46.3 311.7 47.5

10/5 263.8 47 262 47.6 259.5 48.6 253.5 52.5 239.8 58.8 226 65 272.5 44.8 270.8 45.5 266.2 46.8

LEW 283

20/15 400.7 56.6 445.4 65.6 394.9 58.5 381.8 62.8 362.6 69.1 341.8 76 408.6 53.9 406.5 54.7 403.6 55.6

15/10 345.3 56.1 343.2 56.8 340.4 57.9 328.9 62.1 311.4 68.6 293.8 75.1 352.5 53.4 350.4 54.2 346.0 55.7

10/5 295.7 55.4 293.9 56.2 291.5 57.1 281.5 61.3 266.2 67.9 250.8 74.4 301.8 52.7 300 53.6 296.2 54.9

LEW 284

20/15 405.9 56.7 480 71.4 399.2 58.6 386.9 62.7 367.9 69.0 347 76.1 413.7 54.3 411.4 54.9 408.9 55.9

15/10 350.1 55.9 347.4 56.8 344.2 57.8 333.3 62 315.5 68.8 297.7 75.6 357.5 53.2 354.8 54.2 349.9 55.6

10/5 298.5 55.4 297.2 56.1 294.4 57.2 284.8 61.3 269.3 68.3 253.8 75.2 304.8 52.8 303.5 53.6 299.3 55.1

LEW 314

20/15 448.7 64.6 521.5 76.7 441.5 66.8 428.4 71.4 407.1 78.5 384.1 86.3 457.0 61.8 454.6 62.6 451.9 63.7

15/10 386.5 64.1 383.6 65 381.1 66.2 368.3 70.9 349.1 78.4 329.9 85.8 394.1 61.2 391.2 62.2 387.0 63.8

10/5 330.7 63.8 328.7 64.5 325.6 65.7 314.9 70.4 297.9 77.9 280.9 85.3 337.4 60.9 335.4 61.7 330.8 63.3

LEW 344

20/15 482.4 70.3 480 71.4 475.7 72.7 460.9 77.6 438.0 85.4 414.3 93.9 498.8 66.9 496.9 67.9 492.9 69.0

15/10 416.6 69.8 414 70.7 410.2 72 397.8 76.9 376.6 85.0 355.3 93.1 430.4 66.2 428 67.3 420.9 69.1

10/5 357.1 69.1 355 69.9 351.6 71.2 340 76 321.3 84.2 302.5 92.4 368.1 65.8 366.2 66.7 360.2 68.5

LEW 374

20/15 524.7 75.8 521.5 76.7 518 78.2 500.5 83.8 474.7 92.4 448.2 101.6 541.9 72.2 538.1 73.1 534.9 74.3

15/10 453.6 74.9 450.1 76.1 446.6 77.3 432 82.9 408.4 91.7 384.8 100.4 467.6 71.0 464.3 72.4 457.5 74.1

10/5 388.4 74 385.4 75.1 382.3 76.3 369.2 81.9 349.3 90.7 329.3 99.4 400.3 70.5 397.5 71.7 391.6 73.4

LEW 424

20/15 578.5 84.6 574.1 85.8 568.8 87.2 550.3 93 522.4 101.8 492.9 111.8 599.9 81.1 597.8 82.1 592.5 83.4

15/10 498.8 82.1 496.1 83.3 491.4 84.7 475.5 90.4 450.5 100.0 425.4 109.6 517.8 78.5 515.5 79.8 506.2 81.7

10/5 428.3 79.6 426.4 80.6 423.2 82 407.9 88 385.8 98.0 363.6 107.9 444.5 76.1 443 77.2 435.9 79.1

LEW 484

20/15 657.9 92.9 654.7 94.3 650.5 96.0 628.3 103.7 596.5 115.0 560.6 128.1 685.6 88.2 683.5 89.3 677.8 90.9

15/10 571.7 91.9 568.8 93.3 564.9 95.0 545.5 102.3 515.9 113.9 485.3 126.8 594.5 87.4 592.6 88.5 588.0 90.0

10/5 494.5 90.8 490.9 92.1 486.4 93.8 468.9 101.1 443.8 112.5 416.7 125.3 512.1 86.5 510.2 87.6 507.6 88.9

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.

LEW H ‐ LEW W

Tcond [°C]

30/35 40/45 50/55

Size Tev [°C] Pf Pa Pf Pa Pf Pa

LEW 041/2

15/10 63.9 10.7 60.2 12.8 55.3 14.9

10/5 54.5 9.9 51.75 12.4 49 14.9

5/0 47.2 9.8 45.2 12.4 43.2 15

0/‐5 40.6 9.8 39.25 12.45 37.9 15.1

LEW 051/2

15/10 75 12.8 70.9 15.3 66.5 18.4

10/5 65.3 12.5 62.25 15.4 59.2 18.3

5/0 56.4 12.2 54.4 15.15 52.4 18.1

0/‐5 48.2 11.9 47.15 14.9 46.1 17.9

LEW 061/2

15/10 85.5 14 80.5 16.9 75.3 20.5

10/5 74.6 13.7 70.65 17 66.7 20.3

5/0 64.6 13.4 61.7 16.75 58.8 20.1

0/‐5 55.4 13.1 53.45 16.45 51.5 19.8

LEW 071/2

15/10 96.8 16.1 91.7 19.5 86.2 23.7

10/5 84.8 15.9 80.65 19.7 76.5 23.5

5/0 73.9 15.6 70.75 19.45 67.6 23.3

0/‐5 63.7 15.3 61.6 19.15 59.5 23

LEW 081/2

15/10 110.8 17.6 104.4 21.4 97.5 26.4

10/5 96.7 17.3 91.65 21.85 86.6 26.4

5/0 84 17 80.3 21.65 76.6 26.3

0/‐5 72.2 16.9 69.8 21.55 67.4 26.2

LEW 091/2

15/10 123.5 20 116.9 24.4 109.6 30

10/5 107.9 19.9 102.55 25 97.2 30.1

5/0 93.6 19.8 89.75 25 85.9 30.2

0/‐5 80.5 19.7 77.95 25 75.4 30.3

LEW 111/2

15/10 148.6 23.3 140.3 28.6 131.6 35.3

10/5 129.7 23 123.15 29.15 116.6 35.3

5/0 112.5 22.9 107.75 29.15 103 35.4

0/‐5 96.7 22.8 93.5 29.05 90.3 35.3

LEW 131/2 15/10 169.4 26.9 160.3 33.2 150.7 41.2

10/5 148.2 26.6 140.95 33.9 133.7 41.2

Page 27 of 56 RG66006951‐Rev.01

5/0 128.7 26.4 123.45 33.75 118.2 41.1

0/‐5 110.8 26.2 107.3 33.5 103.8 40.8

LEW 141/2

15/10 194.9 31 184.3 37.9 172.4 46.5

10/5 170.5 30.8 161.65 38.65 152.8 46.5

5/0 148.1 30.5 141.55 38.45 135 46.4

0/‐5 127.6 30.2 123.05 38.1 118.5 46

LEW 144

15/10 195.6 32 185.5 38.7 174.1 47.1

10/5 171.4 31.5 162.9 39.1 154.4 46.7

5/0 149.2 31 142.85 38.65 136.5 46.3

0/‐5 128.7 30.5 124.3 38.1 119.9 45.7

LEW 161/2

15/10 218.6 35.3 206.3 42.8 192.5 52.1

10/5 191.2 35.1 181 43.65 170.8 52.2

5/0 166.2 34.8 158.65 43.5 151.1 52.2

0/‐5 143.3 34.5 138.1 43.25 132.9 52

LEW 164

15/10 219.8 35.4 207.1 43.1 193.9 53

10/5 192.2 34.9 182.1 43.95 172 53

5/0 166.7 34.4 159.45 43.65 152.2 52.9

0/‐5 143.5 33.9 138.8 43.3 134.1 52.7

LEW 181/2

15/10 259.1 41.2 244.4 49.9 227.7 60.7

10/5 226.9 40.8 214.4 50.6 201.9 60.4

5/0 197.2 40.2 187.85 50.2 178.5 60.2

0/‐5 169.9 39.7 163.45 49.7 157 59.7

LEW 184

15/10 252 39.6 238 48.2 222.7 59.3

10/5 219.5 39.3 208.35 49.35 197.2 59.4

5/0 190.2 39 182 49.35 173.8 59.7

0/‐5 163.6 39 158.05 49.45 152.5 59.9

LEW 204

15/10 272.9 43.1 258 52.9 241.7 65.2

10/5 238.5 42.8 226.45 54 214.4 65.2

5/0 206.6 42.6 197.9 54 189.2 65.4

0/‐5 177.5 42.4 171.75 53.95 166 65.5

LEW 214

15/10 297.5 46.4 281.3 57 263.7 70.5

10/5 259.9 46 246.8 58.3 233.7 70.6

5/0 225.5 45.7 215.85 58.15 206.2 70.6

0/‐5 193.8 45.5 187.4 58 181 70.5

LEW 243

15/10 337 52.3 318.1 63.4 296.4 77.3

10/5 294.9 51.9 278.65 64.5 262.4 77.1

5/0 256.4 51.5 243.95 64.2 231.5 76.9

0/‐5 221.2 51 212.2 63.65 203.2 76.3

LEW 244

15/10 348.7 53.1 329.5 65.4 309 81.2

10/5 304.9 52.5 289.25 66.8 273.6 81.1

5/0 264.6 51.9 253.1 66.5 241.6 81.1

0/‐5 228 51.6 220.05 66.1 212.1 80.6

LEW 283

15/10 389.7 62 367.3 75.1 342.4 91.3

10/5 341.5 61.3 322.7 76.05 303.9 90.8

5/0 297.2 60.5 283.05 75.45 268.9 90.4

0/‐5 256.7 59.7 246.8 74.7 236.9 89.7

LEW 284

15/10 393.9 62 371.7 75.6 348 92.9

10/5 344.8 61.3 326.65 77.05 308.5 92.8

5/0 299.4 60.8 286.1 76.65 272.8 92.5

0/‐5 258.8 60.3 249.2 76.05 239.6 91.8

LEW 314

15/10 437.6 70.9 413.8 85.8 386.3 104.3

10/5 383.7 70.4 363.35 87.5 343 104.6

5/0 334.6 69.7 319.15 87.2 303.7 104.7

0/‐5 288.5 69 278.05 86.6 267.6 104.2

LEW 344

15/10 477.7 76.9 451.6 93.1 420.6 113.2

10/5 418.8 76.1 395.9 94.55 373 113

5/0 364.7 75.3 346.7 93.9 328.7 112.5

0/‐5 315.7 74.4 301.75 92.95 287.8 111.5

LEW 374

15/10 517.2 82.9 487.7 100.4 454.8 122.2

10/5 453.3 81.9 428.55 101.7 403.8 121.5

5/0 394.8 80.9 376.1 100.85 357.4 120.8

0/‐5 341 79.7 328 99.8 315 119.9

LEW 424

15/10 571.4 90.7 538.5 109.7 505.6 134.7

10/5 499.8 88.1 474.35 109.7 448.9 131.3

5/0 435.8 85.9 416.45 106.7 397.1 127.5

0/‐5 377.5 84 363.95 104.1 350.4 124.2

LEW 484

15/10 655.3 102.5 617.2 126.8 578.1 157.9

10/5 576.3 101.2 546.1 125.3 514.8 156.5

5/0 502.2 99.7 479.0 124.1 456.6 155.4

0/‐5 438.0 98.5 421.7 122.8 406.9 154.8

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2.2 Noise emission Table V: sound emissions for LEW ‐ Lw models: Sound power ‐ Lp: Sound pressure

Sizes: 040 050 060 070 080 090 110 130 140 160 180 200 210 240 280 310 340 370 420 484

Lw [db(A)]

Standard Version

72 72 73 73 74 76 76 77 80 80 81 81 81 82 82 82 83 83 83 86

Low‐Noise Version

68 68 69 69 70 72 72 73 76 76 77 77 77 78 78 78 79 79 79 82

Lp [db(A)] @ 10 m

Standard Version

44 44 45 45 46 48 48 49 52 52 53 53 53 54 54 54 55 55 55 58

Low‐Noise Version

40 40 41 41 42 44 44 45 48 48 49 49 49 50 50 50 51 51 51 54

Lp [db(A)] @ 5 m

Standard Version

50 50 51 51 52 54 54 55 58 58 59 59 59 60 60 60 61 61 61 64

Low‐Noise Version

46 46 47 47 48 50 50 51 54 54 55 55 55 56 56 56 57 57 57 60

2.3 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

CS ‐ Chiller DS Dry Cooler

Chiller HS – Heat Pump WS – Hot only

Frame Model Weight [kg]

Overall Drawing

Weight [kg]

Overall Drawing

Weight [kg]

Overall Drawing

Weight [kg]

Overall Drawing

F1

LEW 041 370 HF64000737 370 HF64000737 415 HF64000737 370 HF64000614

LEW 042 360 HF64000737 360 HF64000737 385 HF64000737 360 HF64000614

LEW 051 430 HF64000737 430 HF64000737 475 HF64000737 430 HF64000614

LEW 052 420 HF64000737 420 HF64000737 445 HF64000737 420 HF64000614

LEW 061 440 HF64000737 447 HF64000737 502 HF64000737 447 HF64000614

LEW 062 430 HF64000737 437 HF64000737 467 HF64000737 437 HF64000614

LEW 071 450 HF64000737 457 HF64000737 512 HF64000737 457 HF64000614

LEW 072 440 HF64000737 447 HF64000737 482 HF64000737 447 HF64000614

LEW 081 470 HF64000737 485 HF64000737 530 HF64000737 485 HF64000614

LEW 082 460 HF64000737 475 HF64000737 510 HF64000737 475 HF64000614

LEW 091 510 HF64000737 525 HF64000737 575 HF64000737 525 HF64000614

LEW 092 490 HF64000737 505 HF64000737 540 HF64000737 505 HF64000614

F2

LEW 111 560 HF64000592 585 HF64000592 645 HF64000592 585 HF64000608

LEW 112 550 HF64000592 575 HF64000592 605 HF64000592 575 HF64000608

LEW 131 570 HF64000592 595 HF64000592 660 HF64000592 595 HF64000608

LEW 132 560 HF64000592 585 HF64000592 625 HF64000592 585 HF64000608

LEW 141 630 HF64000592 650 HF64000592 720 HF64000592 650 HF64000608

LEW 142 615 HF64000592 635 HF64000592 685 HF64000592 635 HF64000608

LEW 161 670 HF64000592 705 HF64000592 775 HF64000592 705 HF64000608

LEW 162 650 HF64000592 685 HF64000592 740 HF64000592 685 HF64000608

LEW 181 710 HF64000592 750 HF64000592 825 HF64000592 750 HF64000608

LEW 182 690 HF64000592 730 HF64000592 780 HF64000592 730 HF64000608

F3

LEW 144 720 HF64000581 740 HF64000581 830 HF64000581 740 HF64001344

LEW 164 740 HF64000581 775 HF64000581 865 HF64000581 775 HF64001344

LEW 184 850 HF64000581 890 HF64000581 985 HF64000581 890 HF64001344

LEW 204 870 HF64000581 915 HF64000581 1110 HF64000581 915 HF64001344

LEW 214 920 HF64000581 965 HF64000581 1065 HF64000581 965 HF64001344

LEW 243 950 HF64000581 1060 HF64000609 1120 HF64000609 1060 HF64000627

LEW 244 980 HF64000581 1090 HF64000609 1270 HF64000609 1090 HF64000627

LEW 283 1050 HF64000803 1120 HF64000609 1180 HF64000609 1120 HF64000627

LEW 284 1090 HF64000803 1260 HF64000609 1340 HF64000609 1260 HF64000627

LEW 314 1250 HF64000803 1330 HF64000609 1420 HF64000609 1330 HF64000627

LEW 344 1290 HF64000803 1380 HF64000609 1470 HF64000609 1380 HF64000627

LEW 374 1330 HF64000803 1440 HF64000609 1540 HF64000609 1440 HF64000627

LEW 424 1410 HF64000803 1530 HF64000609 1650 HF64000609 1530 HF64000627

LEW 484 1510 HF64000803 1520 HF64000609 1710 HF64000609 1710 HF64000627

Page 29 of 56 RG66006951‐Rev.01

Table VII: overall dimensions of the frames of the main units (F_)

Frame of the main unit

Height (H) Width (L) Depth (D)

F1 1594 1174 772

F2 1594 1644 772

F3 1854 2374 877

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2.4 Overall drawings of the main units HF64000737 overall drawing

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HF64000614 overall drawing

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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 40 of 56 RG66006951‐Rev.01

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

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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

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Useful head for LEW 141, 142 pumps on dissipation side Useful head for LEW 144 pumps on dissipation side

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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


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Useful head for LEW 484 pumps on dissipation side

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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 HF64000799

LEW 042 M1 391 HF64000799

LEW 051 M1 400 HF64000799

LEW 052 M1 400 HF64000799

LEW 061 M1 400 HF64000799

LEW 062 M1 400 HF64000799

LEW 071 M1 395 HF64000799

LEW 072 M1 395 HF64000799

LEW 081 M1 395 HF64000799

LEW 082 M1 395 HF64000799

LEW 091 M1 399 HF64000799

LEW 092 M1 399 HF64000799

LEW 111 M1 399 HF64000799

LEW 112 M1 399 HF64000799

LEW 131 M1 412 HF64000799

LEW 132 M1 412 HF64000799

LEW 141 M1 412 HF64000799

LEW 142 M1 412 HF64000799

LEW 161 M1 433 HF64000799

LEW 162 M1 433 HF64000799

LEW 181 M1 543 HF64000799

LEW 182 M1 543 HF64000799

LEW 144 M3 423 HF64000906

LEW 164 M3 433 HF64000906

LEW 184 M3 543 HF64000906

LEW 204 M3 559 HF64000906

LEW 214 M3 559 HF64000906

LEW 243 M3 576 HF64000908

LEW 244 M3 587 HF64000908

LEW 283 M3 587 HF64000908

LEW 284 M3 587 HF64000908

LEW 314 M3 614 HF64000908

LEW 344 M3 614 HF64000908

LEW 374 M3 626 HF64000908

LEW 424 M3 626 HF64000908

LEW 484 M3 626 HF64000908

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)

M1 1594 1174 772

M2 1594 1644 772

M3 1854 1644 877

M4 1854 2374 877

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3.3 Overall drawings of optional hydronic modules HF64000799 overall drawing

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HF64000908 overall drawing for LEW C units

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HF64000908 overall drawing for LEW D W H units

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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:

NsSh

CcV

V = water content in user section [m3] Sh = specific heat of fluid [J/(kg/°C)] e.g. 2090 [J/(kg/°C)] for water = density of fluid [kg/m3] e.g. 1000 [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 51 of 56 RG66006951‐Rev.01

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.

Inertial Tank Ts °C

Inlet water T

Outlet water T

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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

5 °C 2°C ‐1 °C ‐5°C ‐10 °C

Percentage in weight of ethylene glycol

0 % 10 % 15% 25 % 30 %

Freezing temperature of mixture

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

0 % 10 % 15% 25 % 30 %

Reduction percentage of useful flow rate

0 % ‐5 % ‐8 % ‐12 % ‐15 %

Performance loss of the thermodynamic circuit is negligible up to concentrations of 30% glycol, in weight.

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The machines' performance can be calculated with the selection software.

5.1 Working limits ‐ Heat transfer fluid: water or mixture of water and max 30% glycol antifreeze ‐ Maximum water side pressure: = 3 bar ‐ Maximum pressure on high pressure side = 45 bar‐r (**) ‐ Maximum ambient T = 45 °C ‐ Minimum ambient T= ‐10 °C ‐ Maximum pressure on low pressure side = 29 bar‐r (*) ‐ Power supply voltage: = +/‐ 10% compared to plate voltage ‐ Maximum storage T = + 50 °C ‐ Minimum storage Temp = ‐ 20 °C (limit set by on‐board electronics) (*) this value can only be reached during storage and determines the saturation pressure of 30 bar‐r of the refrigerant on the low pressure side of the circuit (value which determines its limits). (**) for units with power outputs higher than 140 kW per circuit, a second pressure switch sets the threshold to 40.5 bar.

5.2 Water flow to evaporator The nominal flow rate is based on a temperature differential of 5° C between inlet and outlet water, in relation to the cooling capacity provided at the nominal water (12/7 °C) temperatures. The maximum allowable flow rate is associated with a temperature differential of 3 °C. Higher flow rates cause unacceptable drops in pressure. The minimum allowable flow rate is achieved with a temperature differential of 8 °C. Lower flow rates may result in low evaporation temperatures, which could trigger the safety devices and stop the unit. They may also cause an incorrect distribution or heat transfer in a non‐turbulent or not fully turbulent flow.

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6 Calibration of control devices

All the control devices are set and tested in the factory before the unit is dispatched. However, after the unit has been in service for a reasonable period of time you can perform a check on the operating and safety devices. The calibration values are reported in Tables I and II.

All the servicing operations performed on the control equipment are considered as extraordinary maintenance and must be carried out EXCLUSIVELY BY QUALIFIED PERSONNEL: incorrect calibration values can cause serious damage to the unit and serious injury to people.

Many of the functioning parameters and calibrations of the control systems that affect the integrity of the unit are set by the microprocessor control and are protected by passwords. Table I ‐ Calibration of control devices

Control device Set Point °C Differential °C

Service thermostat ‐ C 12 2

Service thermostat ‐ H 40 2

Table II ‐ Calibration of safety devices

Control device Unit of

measurement Switching it on Differential Resetting

Antifreeze thermostat °C +4 2 Automatic

Maximum pressure switch cat. IV PED

bar 40.5 ‐ Manual

Low pressure safety valve cat. IV PED

bar 29.0 ‐0 / +10% ‐

Minimum pressure switch bar 1.5 1.0 Automatic

Modulating condensation control [optional]

bar 18 10 ‐

Time between two start‐ups of the same compressor

s 480 ‐ ‐

Flow switch alarm delay s 20 ‐ ‐

Low pressure alarm delay s 1 ‐ ‐

Calibration of the maximum pressure switch The high pressure switch stops the compressor when delivery pressure exceeds the calibration value. For power outputs greater than 140 kW per circuit (namely LER162 in single circuit and LEW304 in dual circuit) there are two maximum pressure switches, one set at 40.5 bar and the other at 45 bar. For smaller sizes, there is just one pressure switch set to 45 bar.

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Attention: do not modify the calibration of the maximum pressure switch. Should the latter fail to work, rising pressure causes the high pressure safety valve to open.

The high pressure switch must be reset manually; this is possible only when the pressure drops below the value indicated by the set differential (see Table II). Calibration of the minimum pressure switch The low pressure switch stops the compressor when the intake pressure falls below the set value for more than 120 seconds. It is reset automatically only when the pressure rises above the value indicated by the set differential (see Table II). Calibration of the service thermostat function This function starts and stops the compressors according to the water temperature reading at the chiller unit inlet [water returning from the system]. Refer to the section of the document on the microprocessor control for further details. Calibration of the antifreeze thermostat function The antifreeze probe is located at the evaporator outlet and stops the compressor if the water temperature drops below the preset limit. Together with the flow switch and low pressure switch, this device protects the evaporator from the risk of freezing as a result of faults in the water circuit. Refer to the microprocessor control manual for further details Calibration of the anti‐recycle timer function The timer function prevents excessively frequent compressor starts and stops. It imposes a minimum time lapse of 480 seconds between two successive starts. Refer to the microprocessor control manual for further details.

Never change the delay time set by the manufacturer: incorrect values could cause serious damage to the unit.

40010 Bentivoglio (BO)Via Romagnoli 12/aTel. 051/8908111Fax. 051/8908122

www.galletti.itAzienda certificata UNI EN ISO 9001 e OHSAS 18001

Documents

HF61G00027 LEW-0-PD-GB-06 HIREF · 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