Daikin EWAD495TZ-SSB2 [102/104] Technical specifications

refrigerantisalsoreducedcomparedtoCu/Alcondenser.Specialtreatmentsensureresistancetothe

corrosionbyatmosphericagentsextendingthelifetime(availableonrequest).

Condenser fansThecondenserfansusedinconjunctionwiththecondensercoils,shallbepropellertypeor

Brushlesswithglassreinforcedresinbladesforhigherefficienciesandlowersound.Eachfanshallbe

protectedbyafanguard.

•Theairdischargeshallbeverticalandeachfanmustbecoupledtotheelectricalmotor,suppliedasstandard

toIP54andcapabletoworktoambienttemperaturesof-20°Cto+65°C.

compressorsuctionanddischargeshut-offvalves,liquidlineshut-offvalve,economizercircuitwithelectronic

expansionvalve,sightglasswithmoistureindicator,replaceablefilterdrier,chargingvalves,highpressure

switch,highandlowpressuretransducers,oilpressuretransducerandinsulatedsuctionline.Condensation

controlTheunitswillbeprovidedwithanautomaticcontrolforcondensingpressurewhichensuresthe

workingatlowexternaltemperaturesdownto-……………°C,tomaintaincondensingpressure.

•Thecompressorautomaticallyunloadswhenabnormalhighcondensingpressureisdetected.Thistoprevent

theshutdownoftherefrigerantcircuit(shutdownoftheunit)duetoahigh-pressurefault.

ReducedSoundunitconfigurations(onrequest)Thecompressorshallbeconnectedwithunit’smetalbase

framebyrubberantivibrationsupportstopreventthetransmissionofvibrationstoallmetalunitstructure,in

ordertolimittheunitnoiseemissions.Thechillershallbeprovidedwithanacousticalcompressorenclosure

circuitbreakerinstalledincontrolpanel,waterfillingsystemwithpressuregauge,safetyvalve,drainvalve.

•Thehydronicmoduleshallbeassembledandwiredtothecontrolpanel.

•Thewaterpipingshallbeprotectedagainstcorrosionandfreezingandinsulatedtopreventcondensation.

•Achoiceoftwopumptypesshallbeavailable:

-in-linesinglepump

-in-linetwinpumps.

TheunitshouldbeabletooperateinPrimaryonlysystemwithtwo-waysvalveonterminalswith

VariablePrimaryFlowcontrolstrategy(availableasoptiononrequest).

Master/SlavetheunitshellbeabletooperateinMaster/Slavemodeinordertobeconnectedwithother

accidentalcontactwithliveparts.

•Themainpanelshallbefittedwithamainswitchinterlockeddoorthatshutsoffpowersupplywhenopening.

•Thepowersectionwillincludecompressorsandfansprotectiondevices,fansstartersandcontrolcircuit

powersupply.

ControllerThecontrollerwillbeinstalledasstandardanditwillbeusedtomodifyunitset-pointsandcheck

controlparameters.

•Abuilt-indisplaywillshowschilleroperatingstatusplustemperaturesandpressuresofwater,refrigerant

andair,programmablevalues,set-points.

•Asophisticatedsoftwarewithpredictivelogic,willselectthemostenergyefficientcombinationof

compressors, EEXV and condenser fans to keep stable operating conditions to maximize chiller energy

•FloatingpointcalculationssupportedforincreasedaccuracyinP/Tconversions.

Controllermainfeatures

Controllershallbeguaranteefollowingminimumfunctions:

•Managementofthecompressorsteplesscapacityandfansmodulation.

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TECHNICAL SPECIFICATIONS