Daikin EWAD220TZ-XLB1 [8/104] General characteristics

Refrigerant circuit

Eachunithasoneortwoindependentrefrigerantcircuitsandeachoneincludes:

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•CompressorInverterdrivenwithintegratedoilseparator

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•Refrigerant

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•Dischargelineshutoffvalve

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•Liquidlineshutoffvalve

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•Sightglasswithmoistureindicator

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•Filterdrier

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•Economizercircuitwithelectronicexpansionvalve

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•Lowpressuretransducers

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•Oilpressuretransducer

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•Suctiontemperaturesensor

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Electrical control panel Power and control are located in the main panel that is manufactured to ensure

protectionagainstallweatherconditions.TheelectricalpanelisIP54and(whenopeningthedoors)internally

protected against possible accidental contact with live parts. The main panel is fitted with a main switch

interlockeddoorthatshutsoffpowersupplywhenopening.

pressures of water, refrigerant and air, programmable values, set-points. A sophisticated software with

predictive logic, selects the most energy efficient combination of compressors, EEXV and condenser fans to

keep stableoperating conditionstomaximizechillerenergy efficiencyandreliability.MicroTechIIIisable to

protectcriticalcomponentsbasedonexternalsignalsfromitssystem(suchasmotortemperatures,refrigerant

gasandoilpressures,correctphasesequence,pressureswitchesandevaporator).Theinputcomingfromthe

highpressureswitchcutsalldigitaloutputfromthecontrollerinlessthan50ms,thisisanadditionalsecurity

for the equipment. Fast program cycle (200ms) for a precise monitoring of the system. Floating point

calculationssupportedforincreasedaccuracyinPressure/Temperatureconversions.

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Control section - main features

-highevaporatorenteringwatertemperature(start-up)

•Displayofevaporatorentering/leavingwatertemperature.

•DisplayofOutdoorAmbientTemperature.

 • Display of condensing-evaporating temperature and pressure, suction and discharge superheat for each

circuit.

•Leavingwaterevaporatortemperatureregulation.

•Compressorandevaporatorpumpshourscounter.

•DisplayofStatusSafetyDevices.

•Numberofstartsandcompressorworkinghours.

•Optimizedmanagementofcompressorload.

GENERAL CHARACTERISTICS