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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5. Chargethechillerwithrefrigerant.ForEP2R
chillers,pleaserefertotheEP2RSeriesChiller
RemoteAir‐CooledCondenserInstallation
GuidelinesManualtodeterminetherequired
refrigerantcharge.EP2AandEP2Wchillers
comefactorychargedandshouldrequireno
additionalrefrigerant.
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6. (EP2RModelsOnly)Checktheremote
condensermainpowerandcontrolwiringto
ensureallconnectionsaresecure.
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7. Verifythatallrefrigerantvalvesareopen.
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8. MakesuretheFreezestatissetappropriately
fortheoperatingconditionsofthechiller.TheFreezestatsettingisinapasswordprotected
menuofthechillercontroller.Referto
theControllerOperationSectionforinstructionon
howtoaccessthismenu,Itshouldbesetat10°F(5°C)belowtheminimumchilledwater
temperaturesettingthatthechillerwillbeoperating.ReferenceTable3tobesurethe
coolantsolutionhassufficientfreezeprotection(glycol)tohandleatleast5°F
(2.8°C)below
theFreezestatsetting.AllchillersareshippedfromthefactorywiththeFreezestatsetat
38°F(3°C).Thisisdonetoprotectagainstapossiblefreeze‐upifnoglycolhasbeenadded
tothecoolant.Oncetheproperglycolsolutionhasbeenadded,theFreezestatcanbe
adjustedtotheappropriatesetting.
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Note:Themanufacturer’swarrantydoesnotcovertheevaporatorfromfreezing.Itisvitalthatthe
Freezestatissetproperly.
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9. Turnonthecontrolpowerby turningthecontrolpowerswitchto"On".Thepaneldisplays
shouldnowbeilluminated.
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10. Duetoextremeambienttemperaturesthattheunitmaybeexposedtoduringshipment,
theHighRefrigerantPressureswitchmayhavetripped.Ifthisisthecase,disconnect
the
mainpowerandresettheHighRefrigerantPressurebydepressingthemanualresetbutton
locatedontheswitch.Reconnectthemainpowerandturnthecontrolpoweronby
pressingthePowerbutton.ClearthealarmconditionbypressingtheAlarmResetbutton.
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11. Establishflowthroughtheevaporator.Standardunitsareprovidedwithaninternalpump
thatcanbeenergizedbypressingtheStartbutton.Iftheunithasbeencustomizedand
doesnothaveaninternalpump,theexternalpumpshouldbeenergizedtoestablishflow
throughtheevaporator.
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Note:Thecompressorwillnotstartaslongastheflowswitchisopen.Apositiveflowmustbeestablished
throughtheevaporatorbeforethecompressorcanoperate.
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Table 3 - Recommended Glycol Solutions
ChilledWater
Temperature
PercentGlycol
ByVolume
50°F(10°C) Notrequired
45°F(7.2°C) 5%
40°F(4.4°C) 10%
35°F(1.7°C) 15%
30°F(‐1.1°C) 20%
25°F(‐3.9°C) 25%
20°F(‐6.7°C) 30%
15°F(‐9.4°C) 35%
10°F(‐12.2°C) 35%
5°F(‐15°C) 40%
0°F(‐17.8°C) 40%