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
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Note:Occasionalbubblinginasightglassmayoccuratatimewhenloadconditionsarechangingandthe
expansionvalveisadjustingtothenewconditions.Thismomentaryoccurrenceisaresultofnormalchiller
operation.
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Anotheruseforthesightglassischeckifthereismoistureintherefrigerationcircuit.
Y‐Strainer
AY‐Strainerwitha20‐meshscreenisintheenteringchilledwaterlinetohelpprotectthe
evaporatorpassagesfromclogging.
AutomaticWaterMake‐Up(Optional)
Withthisoption,awatersupplycanbeconnectedtothechillersothatthewaterlevelinthe
reservoirisautomaticallymaintained.Whenthewaterlevelinthereservoirdropsbelowthe
lowlevelonthefloatswitch,asolenoidvalvewillbeopenedtoallowfreshwaterintothe
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system.Whenthewaterlevelreachesthehighlevelonthefloatswitch,thesolenoidvalveis
closed.
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Note:Thisoptionisnotnormallyrecommendedforsystemsthatdependonaglycolsolutiontopreventfreeze‐
ups.Automaticwatermake‐upmaycausereductionoftheglycolconcentration,whichmayresultinan
evaporatorfreeze‐up.
CoolantPump
Theclose‐coupledcentrifugalpumpisequippedwithamechanicalsealandisconstructedof
stainlesssteel.Thepumpisfactorytestedforthespecifiedoperatingconditions.Thepump
motormeetsNEMAspecificationsandindustrystandards.
UpgradedPumps(Optional)
Thestandardpumpsthathavebeenselectedforeachsizechillerwillmeettherequirementsof
mostapplications;however,incertaininstances,largerpumpsmayberequiredtoprovidethe
desiredflowandpressureforaspecificapplication.Thehorsepowerofthepumpwillbe
indicatedonthechillernameplate.
PressureGauge
Apressuregaugeismountedonthebackpanelofthechiller.Thisgaugedisplaysthepressure
ofthecoolantatthedischargeofthepump.Itcanbeusedtodeterminetheapproximatepoint
onthepumpcurveinwhichthepumpisoperating.
Reservoir
Thereservoirismountedinsidethecabinet.Thereservoirismadeofpolyethyleneandisfully
insulated.Alevelsighttubeisincludedsothecoolantlevelcanbeobserved.Thereisa
removablecoveronthetopofthereservoir.Duringchilleroperationthereservoirshouldbeat
leasthalffull.Formostinstallationsthereservoirhassufficientcapacitytohandlecoolant
drainbackfromtheprocessequipmentwhichoccursduringchillershutdown.Forinstallations
withoverheadpipingrunsofover90feet,(27M)specialprecautionswillhavetobemade
duringinstallation(seeFigure3,onpage
9).