User guide

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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
5
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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
2
),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
2
).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)