Conair MPW Guide de l'utilisateur télécharger pdf (Page 10)

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

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foulingbycontaminantsinthecondenserwaterstreamoccurs,performanceisnegatively

affected.Inordertoreducemaintenancecostsandchillerdowntime,awatertreatment

programishighlyrecommendedforthecondensercoolingwater.Ifcondenserpluggingoccurs,

contactourCustomerServiceDepartmentforassistanceintheproperprocedurefor

cleaning

outthecondenser.

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Caution:Theuseofuntreatedorimproperlytreatedwaterinachillercanresultinscaling,erosion,

algae,orslimebuildup.Thiscanleadtopoorsystemperformanceorprematurefailure.

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Thestandardcoolingcapacityassumes85°F(29°C)condensercoolingwatersupply.Under

normaloperatingconditions,therewillbeapproximately10°F(6°C)risethroughthecondenser

resultingin95°F(35°C)exitingwatertemperaturefromthecondenser.Toensureproperwater

flowthroughthecondenser,thecondenserwaterpumpmustbeabletosupplythepressure

dropgiven(seeFigure1orFigure2onthefollowingpages)whenprovidingtherequired

condenserwaterflowasshowninTable1.Whilethedesignpressurelossismuchlowerthan

25PSI(1.75Kg/cm

),werecommendthepumpingsystembesizedforthislosstoensurethere

willbesufficientsupplypressuretothecondensers.Topreventdamagetothecondenseror

regulatingvalve,thecondenserwaterpressureshouldnotexceed150PSIG(10.5Kg/cm

).The

condenserwaterregulatingvalvecontrolsthecondenserwaterflow.Thechillerloadingand

condenserwaterinlettemperaturedeterminetheactualflow.Thecondenserwatersupply

temperaturerangeisfrom70°F(21°C)to90°F(32°C).Supplytemperaturesoutsidethisrange

arenotrecommendedandmayleadtoimproperchilleroperation.

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Thewaterregulating

valvewillmodulatethe

flowrateofcondenser

waterthroughthe

condenserinorderto

maintainthedischarge

pressuresetpoint.Ifthe

dischargepressureis

abovethesetpoint,the

water‐regulatingvalve

willopentoincrease

thewaterflowattemptingtoprovidemorecooling.Thecondenserwater

flowcanexceed

nominalflowratesduringtheseconditionsandreducetheavailablewaterflowthroughother

processesifsharingthesamepump.

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Warning:Ifthecondenserwaterpumpisfeedingothersourcesinadditiontothechiller,itishighly

recommendedtoinstallanappropriatebalancevalveinlinewiththechillerinordertolimitthe

maximumflowthroughthechiller.

Table 1 – Water Cooled Condenser Water Flow Rate Requirements

ChillerModel

NominalFlow

gpm(lpm) psid(kPA)

EP2W‐05 16.5(62.5) 15.4(106.1)

EP2W‐08 24.1(91.2) 13.6(93.7)

EP2W‐10 35.8(135.5) 29.4(202.6)

EP2W‐15 48(181.7) 23.2(159.8)

EP2W‐20 64.9(245.7) 11.1(76.5)

EP2W‐25 81.7(309.3) 9.5(65.5)

EP2W‐30 96.4(365) 18.2(125.4)

EP2W‐35 111.6(422.5) 27.3(188.1)

EP2W‐40 124.3(470.6) 30.6(210.8)

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 59 60

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Conair MPW Guide de l'utilisateur Page 10

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