Galletti LEW CD User manual
GB
Technical manual
LEW
Reversible Chillers and Heat Pumps - LEW SERIES
40 - 420 kW
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RG66006951‐Rev.01
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RG66006951‐Rev.01
Contents
CONTENTS......................................................................................................................................................3
1GENERAL DESCRIPTION..................................................................................................................5
1.1LEW UNITS ..............................................................................................................................................5
1.1.1PRODUCT CONFIGURATIONS..................................................................................................................5
1.1.2CONFIGURATION AND ACCESSORIES....................................................................................................6
1.1.3FIELD OF APPLICATION...........................................................................................................................7
1.1.4PRODUCT INNOVATION.........................................................................................................................10
1.2STRUCTURE.............................................................................................................................................10
1.3COOLING CIRCUIT ................................................................................................................................10
1.3.1COMPRESSORS......................................................................................................................................11
1.3.2HEAT EXCHANGERS...............................................................................................................................11
1.3.3DE-SUPERHEATER FOR PARTIAL HEAT RECOVERY (OPTIONAL)........................................................12
1.3.4UTILITY AND DISSIPATION SIDE CYCLE INVERSION VALVES (OPTIONAL)......................................12
1.3.5ELECTRONICALLY CONTROLLED ELECTRIC EXPANSION VALVE .........................................................13
1.3.6OTHER COOLING COMPONENTS...........................................................................................................14
1.4ELECTRIC PANEL....................................................................................................................................18
1.4.1CONTROL MICROPROCESSOR...............................................................................................................18
2MAIN UNITS TECHNICAL DATA.................................................................................................19
2.1PERFORMANCE OF LEW C, D, H, WHEAT PUMP UNITS............................................................25
2.2NOISE EMISSION ..................................................................................................................................28
2.3OVERALL DIMENSIONS AND WEIGHT OF THE MAIN UNITS........................................................28
2.4OVERALL DRAWINGS OF THE MAIN UNITS .....................................................................................30
3TECHNICAL DATA OF OPTIONAL HYDRONIC MODULES .............................................39
3.1CHARACTERISTIC CURVES OF THE HYDRAULIC PUMPS ASSOCIATED TO THE UNITS...........39
3.2OVERALL DIMENSIONS AND WEIGHT OF OPTIONAL HYDRONIC MODULES............................45
3.3OVERALL DRAWINGS OF OPTIONAL HYDRONIC MODULES.........................................................46
4INSTALLATION....................................................................................................................................50
4.1INSTALLATION CLEARANCE REQUIREMENTS..................................................................................50
4.2VOLUME OF WATER IN THE SYSTEM .................................................................................................50
5OPERATING LIMITS..........................................................................................................................52
5.1WORKING LIMITS.................................................................................................................................53
5.2WATER FLOW TO EVAPORATOR.........................................................................................................53
6CALIBRATION OF CONTROL DEVICES...................................................................................54
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Declaration of conformity
The declaration of conformity is attached to each machine
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1Generaldescription
1.1 LEW units
LEWreversiblewaterchillersandheatpumpsareairorprocessfluidconditioningunits,designedforbothdomesticand
industrialuseandinoperation24hoursaday.Theycoverathermaloutputrangefrom40to429kW,guaranteeinga
highlevelthermodynamicperformanceandawiderangeofconfigurationpossibilities,bothinaccessoriesandcooling
circuit.
LEWmachineshavebeenbuiltinafullyfairedframeworktomaketheassemblyextremelysilent.Theycanthereforebe
installedinopenenvironmentswithoutneedingtobeclosedoff.Theall‐newnewrounded‐offshapeenhancestheir
appearance.TheexclusiveuseofR410Arefrigerantandofhigh‐qualitycomponentsinthechiller,hydraulicand
electricalpartsmakestheLEWunitsstate‐of‐the‐artchillersintermsofefficiency,reliabilityandemittedsoundoutput.
1.1.1 Product configurations
TheseriesofLEWmodelsconsistsinawiderangeofproducts,meetingallsystemneeds:
LEWCwaterchillers‐coldwateronly
LEWDwaterchillers‐coldwateronly(interlockedbyDry‐CoolerorEvaporativeturret)
LEWHwaterheatpumps‐chillersidereversiblewater
LEWWwater‐wateronlyheatingheatpumps
Alltheabove‐mentionedversionsareavailableinsizesreferredtointhetablebelow.ThesizesoftheLEWunitsare
expressedintheX‐coordinatesofthetableintermsofratedcoolingcapacity[kW],obtainedinconditionswithchilled
waterproducedat7°Candcombinedwiththeevaporativeturretwithdissipationcircuitwaterat29°inletand35°
outlet.
TableI‐TablesummarisingtherangeofLEWproductsbysizeandEfficiencyPack:
Sizes:040050060070080090110130140160180200210240280310340370420480
Efficiency
Pack1F1F1F1F1F1F1F2F2F2F2F2
Efficiency
Pack2F1F1F1F1F1F1F2F2F2F2F2
Efficiency
Pack3F3F3
Efficiency
Pack4F3F3F3F3F3F3F3F3F3F3F3F3
ThefirstcolumnofTableIshowstheavailable"EfficiencyPacks".Thesedeterminetheconfigurationofthecooling
circuit.Forfurtherdetailsseeparagraph1.3“Coolingcircuit”.Forexample,thesize“LEW2090”developsa90kW
chilleroutputandisimplementedwithEfficiencyPack2(twocompressors,onecoolingcircuit).Thedimensionsofthe
"Frames"oftheunitsarelistedinthecells,bymeansofreferencesymbolsF1F2F3(withincreasingdimensions);allthe
informationconcerningtheweightofthemachinesandthedimensionscorrespondingtoeachframeisavailablein
paragraph2.3"Overalldimensionsandweight".AllsizesoftheLEWseriescanbeimplementedwiththestandard"S"
set‐uporthe"L"soundproofset‐up,coveringthecompressorandouterpanellingwithsoundproofmaterial.
TheLEWunitsareidentifiedwiththefollowingsymbol:
LEW072CS
12 3 4 5
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1‐IdentificationsymbolofHirefModel(e.g.:“LEW”unit)
2‐Unitsizesexpressedinratedchillingoutputx10[kW](e.g.:70kW)
3‐EfficiencyPack:coolingcircuitandcompressorlayout(e.g.:EfficiencyPack2)
4‐Machineversion(e.g.:“C”,Chiller)
5‐Machineexecution(e.g.:“S”soundproofingnotavailable)
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
LEWunitsaredesignedforcooling‐heatingwaterandsolutionscontainingupto30%glycol(percentagebyweight)in
civil,industrialandtechnologicalair‐conditioningsystems.Theunitscannotoperateoutdoors,asthemetalwork
providesanIP43insulation.Pleasecontactthetechnicalofficefortheseapplications.
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.
LEWmultifunctionmachineshave4waterconnectionsassociatedwithtwodifferentwatercircuitsfor2‐pipesystems:
Circuit1,productionofcoldorhotwaterforutility;
Circuit2,productionofhotorcoldwaterfordissipationinoppositiontotheutility;
Accordingly,themultifunctionunitshave2heatexchangers:
Plateheatexchanger1withbothevaporationandcondensationfunction,intendedfortheutilitycircuit;
Plateheatexchanger2withbothevaporationandcondensationfunction,intendedforthedissipationcircuit;
CoolingLEWmachine:viewofthewaterconnectionsandofthethermodynamiccircuit
Forthecorrectdirectionoftheconnections,alwaysrefertothedimensionaldrawingattachedwiththedocumentation.
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LEWCmachinesaredesignedforcold‐onlyproduction:intheutilitycircuitonlytheproductionofchilledwateris
envisaged.TheLEWHmachinesarereversibleheatpumps:intheutilitycircuithotwaterandchilledwatercanbe
producedalternatively.
ThefollowingpointsbrieflyillustratetheoperatingfunctionsoftheLEWC,D,H,Wunits:
Chilling
LEWC,D,Hunitsin“Chiller”modecoolthewatertocooldowntheenvironmentontheutilityside,therebydissipating
condensationheatwiththewatercooledbythedissipationheatexchanger.
Heating
LEWH,Wunitsin“HeatPump”modeheatthewaterinthecondensertoheattheutilityside,therebydissipatingthe
evaporationcoolingcapacitybymeansofthewaterwhichisheatedinthedissipationheatexchanger.Inotherwords,a
certainamountofheatisdrawnfromathermalsourceandisthentransferredtotheutilityafterithasreacheda
sufficientthermallevelthatissuitableforitsneeds.
DISSIPATION
UTILITY
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Air‐conditioningapplicationsoftenneedtobeabletodisposeofheattoheatupdomestichotwaterorforpost‐heating
controlinairtreatmentfacilitieswhereanautonomousTemperatureandhumiditycontrolwillbeimplemented.The
heatrequiredcanbedrawnfromthecondensingsectionofthethermodynamicunit,whichisatahighertemperature.
Ifonlypartoftheheatisdrawn,ade‐superheatersendsgas‐sensitiveheattothedeliverypipetowardsthethird
thermalsourceatahighertemperature.
Uponspecificdemand,allcold‐onlyunitsoftheLEWseriescanbeequippedwithade‐superheaterforpartialheat
recovery.Theavailablethermaloutputthatcanbeusedfordomestichotwater,forexample,dependsontheunit's
operatingconditions.
Layoutofpartialheatrecoverycircuit
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1.1.4 Product innovation
LEWunitsprovideexcellentthermodynamicperformanceandmaximumflexibilityofusethankstoconstantproduct
research.Thejointapplicationofscrollcompressors,advancedcontrolsystemsandR410Arefrigerantgasachieves
compactcircuitsandhighCOPs.
Thepossibilityofkeepingtheevaporatorontheinsideallowsyounottoaddglycoltothewaterinthesystem,with
clearadvantagesintermsofthermodynamicperformance,preservationfromcorrosionandrespectforthe
environment.Italsomakesitpossibleforallthecomponentsrequiringmaintenancetobeinstalledinaneasily
accessiblespace.
Chillerunitscanbeappliedevenwhennodissipationsourceotherthanairisavailable:awaterDry‐Coolerprovides
thermalexchangewiththeatmospherewhilemaintainingacompact‐sizedcircuit.
Forlargebuildings,air‐conditioningcanbeimplementedasthefloors/zonesaresoldorrentedbyinstallingaLEWunit
foreachfloorinasmallsizetechnicalroom,thusspreadingtheinvestmentovertime.Theoveralldimensionsofthe
units(lessthan90cmdepthinthehigheroutputsizes)makethemeasytobeinstalledsincetheyfitthroughanydoor.
Themaininnovationswhichthisproductpresentsaresummarisedinthefollowinglist:
Optionofusingwaterwithoutglycolintheutilitycircuit
Heatpumpmodewithchillersidecycleinversion
Optionofevenheatpumpversionsusingcondensationcontrol
Electronicallycontrolledelectricexpansionvalve
HighCOP(Coefficientofperformance)ofthermodynamiccycle
Reducedrefrigerantload
Optionofapplyingchillermodeevenwhenairisusedasdissipationsource
Itoccupieslessspaceonthefloor‐plan(specificpowersupto153kW/m2)
Innovativeaestheticfeaturesandfullsafetysinceunitsarecompletelyclosed
Nonoiseontheoutside,lessnoiseontheinsideduetodual‐soundproofinginlow‐noiseversions.
1.2 Structure
AllLEWseriesunitshavetheloadbearingbaseandpanellingingalvanisedsheetmetalpaintedwithpolyesterpowders
andpolymerisedintheovenat180°C.Theunithasanattractivedesignandwhenclosedallthecomponentsare
inaccessible.This,alongwiththeextensiveuseofsoundproofingmaterialinsidethecompartmentandaroundthe
compressors(availableforthelow‐noiseversion),reducessoundtoexceptionallylowlevels(Lp<67dB‐A@1metrefor
biggersizes).
Thehydraulic/chillerconnectionsareenvisionedontherightside,whenlookingattheelectricalcontrolboard,to
reducethetechnicalspacerequiredforinstallation.Allthepanelsareremovable(exceptfortheoneontheright,upon
whichallthehydraulicconnectionsarefitted)makingtheunitfullyaccessibleeventhoughroutinemaintenanceonly
needsaccessingfromthefront.
1.3 Cooling circuit
Thecoolingcircuitismanufacturedinourfactory,withtopbrandcomponentsandoperatorstrained,accordingto
Directive97/23,onallthebrazingoperations.
Therangecanbeconfiguredinthecoolingcircuitmode(EfficiencyPack)which,dependingonthesize,canbeadual
compressoronadoublecircuit(EfficiencyPack1)forahighlyredundantsystem,dualcompressor(tandem)onsingle
circuit(EfficiencyPack2)forgreaterefficiencyinpartialloads,threecompressors(trio)onsinglecircuit(EfficiencyPack
3)combiningeconomicalimplementationandpartialloadefficiencyandfourcompressors(twotandems)onadouble
circuit(EfficiencyPack4)forasystemwhichisbothredundantandefficientwiththereducedload.
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TableII–ListandgraphicalrepresentationofthelayoutofthecomponentsinfourEfficiencyPacks:
EfficiencyPackONE:EfficiencyPackONE:
EfficiencyPackTWO:EfficiencyPackTWO:
EfficiencyPackTHREE:EfficiencyPackTHREE:
EfficiencyPackFOUR:EfficiencyPackFOUR:EfficiencyPackFOUR:
Solutionswithmorethanonecircuitprovidetheutmostreliabilitythankstoredundancy,whilethosewithmorethan
onecompressoronacircuitprovidepartialloadswithidealefficiency,alsothankstoincreasedheatexchangesurfaces.
1.3.1 Compressors
OnlytopinternationalbrandScrollcompressorsareusedonLEWunits.Scrollcompressors,uptoapoweroutputof182
kWforsinglecircuit,arethebestsolutionintermsofreliabilityandefficiency.Theyalsoprovidethelowestamountof
soundemissions.Processoptimisation,alongwithacarefullyselectedintrinsicvolumetriccompressionratio(RVI),
clearlyimprovestheisentropiccompressionperformanceandreducesenergylosses.Theuseofascrollcompressor
allowslowviscosityoilstobeused.This,incomparisontohigherviscosityoils,reducesthermalresistanceatthe
evaporator.Italsoincreasestheevaporationtemperaturebymorethan1.5°C(EERincreasesbymorethan5.5%)
comparedtoothersolutions.
Compressormotorsareprotectedagainstoverheating,overloadsandhighdeliverygastemperatures.Theyare
mountedonrubberanti‐vibrationmounts,completewithoilchargeandinsertedinasoundproofcompartmentwith
sound‐absorbingmaterial.Alsocompletewithautomaticoilheatertopreventtheoilfrombeingdilutedbythe
refrigerantwhenthecompressorstops.
NOTE:Scrollcompressors,likeallair‐tightcompressors,areclassifiedaspressurisedcontainers.Thelowpressure
section,referredtobythePSonthedataplate,complieswithPEDCE97/23.
1.3.2 Heat exchangers
Onlybrazedplateheatexchangersareused,madeofausteniticstainlesssteelAISI316,withAISI316Lconnections.
Thesefeatureareducedcarboncontentthatfavoursbrazingoperations.Thebrazedplateheatexchangerrepresents
thestate‐of‐the‐artintermsofthermalexchangeefficiencyandallowsastrongreductionoftherefrigerantload
comparedtostandardsolutions.Thehighlevelofturbulencegeneratedbyinternalplatecorrugation,alongwithplate
smoothness,makesitdifficultfordirttoaccumulateorforlimescaletobuilduponthecondensercircuit.Theseheat
exchangersalsomakeitpossibletouseR410Afluidwhich,thankstothehigh‐levelthermalconductivityofitsliquid
phaseandtoitsazeotropicbehaviour,enhancesthermalexchangeduringevaporation.Theperformancesareimproved
overothermethane‐derivativefluidsoftheHFCgroup.
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NOTE:duetothermalinsulationthedataplate(incompliancewithPEDCE97/23)isnotlegible.However,theserial
numberoftheheatexchangerandthedeclarationofconformityarebothrecordedduringproductionandarean
integralpartofHiref'sarchive.
1.3.3 De-superheater for partial heat recovery (optional)
Theoptionofpartialheatrecoveryisimplementedwithabraze‐weldedplateheatexchangerplacedinseriesonthe
finnedpackcondenseranditssizelimitspressuredropsontherefrigerantsidetoaminimum.
Allmachinesconfiguredwithheatrecoveryuseasperstandardmodulatingcondensationcontrol.Topreventalackof
balanceinthecoolingcircuit,ifthewatertemperatureistoolowwhentherecoverystarts,thehydraulicrecovery
circuitisimplementedasindicatedinthefollowingfigure:alowwatertemperatureatrecoverywouldcauseadropin
thecondensationtemperatureandthereforeaninsufficientpressurejumpontheexpansionvalvewiththeensuingrisk
ofthesafetydevicesbeingtriggered.
Thebulbofthe3‐waymixervalveisplacedatthede‐superheaterexchangerinlet,whichbymixingthehotwater
producedwithcolderwaterfromthetankallowsyoutolimitthetimeneededforthesystemtoreachfulloperating
capacitytoafewmoments.Abuffertankmustbeplacedbetweentheunitandtheutilitysincethedemandforhot
wateranditsavailabilityarenotsimultaneous,becauseitneedsthecompressorstoberunning.
Itshouldbepointedoutthattheheatrecoveryoutputislinkedtothedispensedcoolingoutputandthat,therefore,in
partialloadsituationsitisalsoreducedjustthesame;thisaspectmustbetakenintoconsiderationforthedimensions
ofthebuffertank.Thepartialheatrecoveryoptionissuppliedonlywiththede‐superheaterexchanger.Theother
componentsofthecircuitlaidoutinthepreviousfigurearenotincludedinthesupply.
1.3.4 Utility and dissipation side cycle inversion valves (optional)
WhenLEWHreversiblechillersswitchfromchillertoheatpump,andviceversa,theyperformtwocycleinversions:one
onthecoolantcircuitandoneonthewatercircuit.Theinversionvalveofthewater‐sidecycleswitchesfrompositionA
topositionBandviceversabymeansofanelectricaldriverwithoutchangingthedirectionoftravelfortheoutside
utilities.Thisallowsyoutoinvertthedirectionoftheflowintheheatexchangers,keepingthemagainsttheflowin
relationtotherefrigerantfluidineveryoperatingmode.Thewater‐sidecycleinversionvalveisanoptionalcomponent.
TANK
DIVERTER RECIRCULA
T
IONPUMP
HEAT
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Refrigerantsidecycleinversionvalve Heat‐transferfluidsidecycleinversionvalve
1.3.5 Electronically controlled electric expansion valve
Theelectronicallycontrolledvalvewithexternalequalisationandbuilt‐inMOPfunctionismanagedbythesoftwareand
thereforemakescoolingcircuitoperationveryefficient,stabilisinganddecreasingthepowerabsorbedbythesystem
whenasuddenthermalloadvariationoccurs.Theshutterinthecentralpartofthevalvecanalwaysslideverticallywith
anamplestrokeallowingvariationofthedegreeofopeningoftheorificeofthefluidpassage.Usingthisvalvereduces
compressorenergyconsumptionwhenthesurroundingconditionsbringthepressuredifferencebetweenthe
evaporatorandtheairconditionerbelow5bar,thusimprovingperformance.
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1.3.6 Other cooling components
‐Molecularsievefilterdryer
‐Sightglasswithhumidityindicator
‐One‐wayvalves(onlyreversibleheatpump)
‐LiquidreceivermarkedincompliancewithECDirective97/23PED(onlyreversibleheatpumpsorunitswithremote
condenser)
‐Highandlowpressureswitches
Schradervalvesforcontroland/ormaintenance
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Diagramofthedual‐circuitcold‐onlyversion(pleasenote:thisisastandardlayout,refertothelayoutenclosedwiththe
unit).Toconsultthelayouts,pleaserefertothesymbolsinthefollowingtable.
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Diagramofthedual‐circuitreversibleheatpumpversion(pleasenote:thisisastandardlayout,refertothelayout
enclosedwiththeunit).
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Referencetablefornumberingusedinlayouts
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1.4 Electric panel
TheelectricpanelisbuiltandwiredinaccordancewithstandardEN60204‐1.Theelectricpanelisaccessedfromthe
frontofthemachine.Beforeitcanbeaccessed,theunitmustbedisconnectedfromthepowersupplyusingthemain
switch,whichfunctionsasadoor‐lock.Alltheremotecontrolsareimplementedwithlowvoltagesignalsat24V,
poweredbyanisolationtransformerpositionedinsidethecontrolboard.Allthecontrolboardshaveanaircirculation
systemwithauxiliaryfans.Thepositionofthemainswitchmakeswiringoperationsintheworksiteeasier.Thisavoids
severaldifficultoperationsaswellashavingtotwistthepowercords.Alltheutilitiesareprotectedagainstsurgesand
shortcircuits.Thecircuitbreakerset‐upcanbeconfiguredforanyload(optional).Thermalprotection,however,is
carriedoutbythermistorchains.Thesearesetinthewindingsofeachelectricmotorandarecontrolledbyonboard
electronics.Allmachinesarestandard‐equippedwithaphasesequencerelaywhichinhibitscompressoroperationif
thephasesequenceisnotcarriedout:onlyonedirectionofrotationispossibleforscrollcompressors,aswellasforthe
screwandRotarycompressors.TheunitisratedIP43whichmakesitsuitableforoutdoorinstallation.Thecontrol
boardwiththeopenpanelmaintainsanIP20rating.InsidetheelectricalcontrolboardoftheBasiccontrolthereare
twomanualselectorstoenableremoteswitchingon‐off,seasonalchangeover(onlyheatpumps)andtoselectlocalor
remotecontrol:remoteconsentsareimplementedbyverylowvoltagecontactsplacedontheterminalboard.
1.4.1 Control microprocessor
LEWseriesunitshavetwodifferentmicroprocessorcontrollevels:
‐Basic–CarelµChiller
‐Advanced–CarelseriespCO
Thelatter,inadditiontothefunctionsdescribedbelow,cancustomisethesoftwaretomeetallsystemrequests.These
includecascademanagementoftheunitswithstep‐controlorcascadelogic.Themicroprocessoronboardtheunit
controlsthevariousoperatingparameterswithanelectricpanelkeypad;
‐Compressorconnection/disconnectiontomaintaintheset‐pointofthechillerinletwaterT;
‐Alarmmanagement:High/lowpressure;Antifreeze/Flowswitch;Pumpalarm
‐Alarmsignals
‐Displayofoperatingparameters
‐Evaporatoranti‐freezeprotection
‐Controlofmaximumnumberofcompressorstarts
‐RS232,RS485serialoutputcontrol(optional)
‐Incorrectphasesequence(notviewedondisplay,preventsthecompressorfromstarting)
Asforremotecommunication,thecontrolscanbeconnectedtoadvancedBMSsystems.TheHSD(HiRefSoftware
Department)structureiscapableofassistingcustomersinintegrationoperations.Systeminterconnectivitycapabilities
aresummarisedbelow:
‐Availableserialports
‐RS232
‐RS485
‐Ethernet(“HiWeb”board)
‐GSMModem:withprepaidcardandrelativeantennaonboardthemachineforautonomoustwo‐waycontrolof
alarmsand/orset‐pointvariations
‐Protocols
‐Carel [Built‐In]
‐Modbus®[BuiltInwithAdvancedcontrols]
‐Modbus®[WithexternalgatewaywithBasiccontrols]
‐LonWorks®[Dedicatedserialboardtoberequestedwhenorderingthemachine]
‐BACnet™[Withexternalgateway]
‐TCP‐IP[Withexternalgateway]
‐TREND®[Dedicatedserialboardtoberequestedwhenorderingthemachine]
(ref.Microprocessorcontrolmanualforfurtherdetails)
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2Mainunitstechnicaldata
ThefollowingchapterprovidesthetechnicaldatafortheLEWunit.Performancevaluesareaccuratelyreportedandcan
beinterpolatedtoknowspecificoperatingconditions.
TableI–TechnicaldataofLEWchillersinstandardoperatingconditions
RATEDTECHNICALDATAOFLEWWATERCHILLERS@12/7°C;15/30°C
Efficiencypack1212121212
LEWCS/CL 41425152616271728182
CoolingcapacitykW51.951.160.260.169.169.277.977.989.189.1
RatedabsorbedpowerkW9.38.711.211.212.412.414.314.315.915.9
Evaporator‐sidepressuredropskPa38375151404050503939
Evaporator‐sideflowratel/h8933879110360 10344 11888 11897 13406153261533015326
CondenserpressuredropskPa7799121215151818
Condenser‐sideflowratel/h3483340240624057463746395246597259745972
ElectricalpowersupplyV/ph/Hz400‐3N‐50Hz
Scrollcompressors/coolingcircuitsNo.2/22/12/22/12/22/12/22/12/22/1
Victaulichydraulicconnectionsinches21/221/221/221/221/221/221/221/221/221/2
Heightmm1594159415941594159415941594159415941594
Lengthmm1174117411741174117411741174117411741174
Depthmm772772772772772772772772772772
Maximumcurrent(FLA)A30.030.037.037.040.040.046.046.050.050.0
Boostercurrent(LRA)A111.0111.0156.0156.0157.0157.0164.0164.0176.0176.0
LRAwithsoft‐starterkitA73.073.083.083.0102.0102.0107.0107.0117.0117.0
EER 5.756.055.465.455.725.735.545.545.765.76
Refrigerantload kg6565667777
RATEDTECHNICALDATAOFLEWWATERCHILLERS@12/7°C;15/30°C
Efficiencypack121212124
LEWCS/CL 9192111112131132141142144
CoolingcapacitykW99.399.3118.9118.9135.6135.5157.2157.3156.9
RatedabsorbedpowerkW18.018.021.321.324.624.627.927.928.8
Evaporator‐sidepressuredropskPa484839395050474747
Evaporator‐sideflowratel/h17075 17077 20448 20454 23326 23309270392706126983
CondenserpressuredropskPa222230303838191919
Condenser‐sideflowratel/h667466757978798091189112105321053810563
ElectricalpowersupplyV/ph/Hz 400‐3N‐50Hz
Scrollcompressors/coolingcircuitsNo.2/22/12/22/12/22/12/22/14/2
Victaulichydraulicconnectionsinches21/221/221/221/221/221/221/221/221/2
Heightmm159415941594159415941594159415941854
Lengthmm117411741674167416741674167416742374
Depthmm772772772772772772772772772
Maximumcurrent(FLA)A61.061.070.071.079.079.091.091.092.0
Boostercurrent(LRA)A203.0203.0238.0275.0244.0244.0289.0289.0197.0
LRAwithsoft‐starterkitA137.0137.0176.0210.0182.0182.0224.0224.0140.0
EER 5.605.605.715.715.585.585.735.745.54
Refrigerantload kg8812121312151315
Page20of56
RG66006951‐Rev.01
RATEDTECHNICALDATAOFLEWWATERCHILLERS@12/7°C;15/30°C
Efficiencypack12412344
LEWCS/CL 161162164181182184204214
CoolingcapacitykW174.9175.1176.2204.5204.8198.9219.1235.1
RatedabsorbedpowerkW32.132.131.937.937.936.439.342.7
Evaporator‐sidepressuredropskPa5151525454515157
Evaporator‐sideflowratel/h30076 30113 30302 35180 35218 342113768040444
CondenserpressuredropskPa2323233031292833
Condenser‐sideflowratel/h11771 11783 11838 13788 13803 133861470315805
ElectricalpowersupplyV/ph/Hz 400‐3N‐50Hz
Scrollcompressors/coolingcircuitsNo.2/22/14/22/22/14/24/24/2
Victaulichydraulicconnectionsinches21/221/221/221/221/221/221/221/2
Heightmm15941594185415941594185418541854
Lengthmm16741674237416741674237423742374
Depthmm772772772772772877877877
Maximumcurrent(FLA)A102.0102.0100.0116.0116.0122.0132.0142.0
Boostercurrent(LRA)A298.0298.0211.0361.0361.0250.0321.0328.0
LRAwithsoft‐starterkitA233.0233.0152.0278.0278.0184.0256.0263.0
EER 5.535.545.595.465.475.545.645.55
Refrigerantload kg1515151615222222
RATEDTECHNICALDATAOFLEWWATERCHILLERS@12/7°C;15/30°C
Efficiencypack343444444
LEWCS/CL 243244283284314344374424484
CoolingcapacitykW267.9279.0313.0316.4349.7377.4410.6453.5520.7
RatedabsorbedpowerkW47.847.956.456.364.770.474.581.692.5
Evaporator‐sidepressuredropskPa515540414956545653
Evaporator‐sideflowratel/h46080 47979 53828 54419 60144 64905706237800389412
CondenserpressuredropskPa212328283536333339
Condenser‐sideflowratel/h17961 18601 21017 21207 23571 25469276523044635016
ElectricalpowersupplyV/ph/Hz 400‐3N‐50Hz
Scrollcompressors/coolingcircuitsNo.3/14/23/14/24/24/24/24/24/2
Victaulichydraulicconnectionsinches21/221/23333333
Heightmm185418541854185418541854185418541854
Lengthmm237423742374237423742374237423742374
Depthmm877 877 877 877 877 877877877877
Maximumcurrent(FLA)A153.0159.0174.0182.0204.0218.0232.0281.0302.0
Boostercurrent(LRA)A336.0301.0401.0355.0374.0437.0442.0490.0525.0
LRAwithsoft‐starterkitA271.0239.0318.0290.0309.0354.0359.0420.0454.0
EER 5.685.865.685.755.495.415.575.605.63
Refrigerantload kg213028353535404040
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