Daikin EWAD610TZ-SSB2 [5/104] General characteristics

Single screw compressor with integrated Inverter and Variable Volume Ratio technology

The EWAD~TZ B is equipped with the latest technology of screw single compressors. Thanks to the careful

design, result of years of experience, the single screw compressors by DAIKIN are characterized by highly

balancedloadresultinginreducedstressforthecomponentsextendingtheusefullifeandimprovingreliability.

Vibration and sound emission are also reduced. The high volumetric efficiency of single screw compressors

makes them an ideal solution forvariable speed applications. Thanks to the Variable Frequency Drive (VFD)

technologytheEWAD~TZBisabletomatchtheactualloadrequiredfromtheplantineverycircumstances

continuouslymodulatingthespeedofthecompressor'smotor,whichisthemostefficientwaytoperformthe

capacitycontrolofthecompressor.



The VFD provides lower starting current compared to typicalstarters such that the inrush current does not

exceedthefullloadoperatingcurrent.Thisfeaturecanhelptoreduceelectricalinstallationcosts,andallowsto

meeteventuallocalrequirementsonmaximumpossibleinrushcurrent.

TheVFDdriveisinstalleddirectlyonthecompressorandcontainedinaspecificallydesignedsealedhousing.

Thetemperatureoftheelectroniccircuitiskeptconstantthankstotherefrigerantcoolingsystemresultingin:



morecompactelectricalpanel



extendedlife



improvedreliability



The compressors for Gold and Platinum series of EWAD~TZ B are equipped with the new brushless DC

motors.Thismotorsarechacterizedbyevenhigherefficiencyandimprovedreliability.



Variable Volume Ratio Technology

Screwcompressorsincreasestherefrigerantpressurebyforcingitintoaprogressivesmallervolume,fromthe

suction to the discharge port. Once thatthe geometry of thecompressor is defined the volume ratio of the

compressorisalsodefined.ThepressureratioandtheVolumeratioaredefinedasfollowandlinkedthrough

theequationofstateofthegas.



Asresultthegeometryofthecompressordefinethecharacteristicpressureratio.Onthemarketareavailable

compressors optimized for different pressure ratios to be used according to the application. A compressor

optimized for low compression ratio will not be efficient in operations with high compression ratio and vice

versa.

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GENERAL CHARACTERISTICS