Conair MPW Uživatelská příručka stáhnout pdf (Strana 52)



Corporate Office: 724.584.5500  Instant Access 24/7 (Parts and Service): 800.458.1960  Parts and Service: 814.437.6861

47



HumanMachineInterface(HMI)

Thehumanmachineinterface(HMI)providesauserinterfacewiththePLC,whichcontrolsthe

operationofthechiller.TheHMIallowsdataentryforchillersetup,acceptscommandsto

operatechiller,anddisplayschillerstatus.

PressureReliefValve

Apressurereliefvalveisinstalledonallpressurevesselstosafelyrelievepressureduetofireor

otherabnormaloperatingconditions.EP2Wchillershaveapressurereliefvalveinstalledonthe

water‐cooledcondenser,EP2Achillershaveoneontheliquidline,andEP2Rchillershaveone

installedonthereceiver.Replacethisvalveifitopens.



Note:VentrefrigerantreliefvalvesinaccordancetoANSI/ASHRAEStandard15,SafetyCodeforMechanical

Refrigeration.

Receiver

ThereceiverisstandardonEP2RunitsandoptionalonEP2AandEP2Wunits.Itisprimarilya

liquidstoragetanktoholdliquidrefrigerantwhennotincirculation.Sinceanair‐cooled

condenserlocatedoutdoorsprovidestherefrigerationcyclecooling,therefrigerantchargewill

varyfromwintertosummeroperation.Duringthesummermonths,thereceiverholdsthe

excessrefrigerantchargerequiredinthewinter.Thereceiveralsoaidsinholdingthe

refrigerantchargewhileinpumpdown.

RefrigerantFilter/Drier

Thefilter/drierislocatedintheliquidlineafterthecondenser.Itremovesanymoistureand/or

foreignmatterthatmayhavegottenintotherefrigerantstream.Moistureandforeignmatter

cancauseseriousdamagetothecomponentsofarefrigerationsystem.Forthisreason,itis

importantthatthechillerbeequippedwithacleanfilter/drier.Replacethefilter/driercoreif

anyofthefollowingconditionsoccur.



• Openingtherefrigerationsystemtotheatmosphereforrepairsormaintenance

• Indicationofmoistureinthesightglass

• Anexcessivepressuredropdevelopsacrossthefilter/drier(Asignificanttemperature

differencebetweenthefilterinletandoutletindicatesthis.)

RefrigerantServiceValve

Amanualtwo‐wayballvalveisprovidedintherefrigerantliquidlinejustdownstreamofthe

condenserorreceiver.

RefrigerantSightGlass

Therefrigerantsightglassislocatedontheliquidline.Itallowstheoperatororservice

techniciantoobservetheflowofliquidrefrigerantinthecircuit.Prolongedperiodsoffoaming

inthesightglassmayindicatealowrefrigerantconditionorarestrictionintheliquidline.



1 2 ... 47 48 49 50 51 52 53 54 55 56 57 58 59 60

Žádné komentáře

Conair MPW Uživatelská příručka Strana 52