Pentair EASYTOUCH PL4 User Manual

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EASYTOUCH
®
PL4/PSL4 Control Systems User’s Guide
SAT INDEX:TheSaturationIndex(SI),alsocalledtheLangelierIndex,isachemicalequationorformulaused
todiagnosethewaterbalanceinthepool.TheSaturationIndexformulaisSI=pH+TF+CF+AF-12.1.To
calculatetheSaturationIndex,youmustrsttestthepoolwaterforpH,temperature,calciumhardness,andtotal
alkalinity.Refertoachartforassignedvaluesforyourhardness,andalkalinityreadingsthenaddthesetoyourpH
value.Subtract12.1,whichistheconstantvalueassignedtoTotalDissolvedSolidsandaresultantnumberwill
beproduced.Aresultbetween-0.3and+0.5indicatesbalancedwater.Testresultsnotwithinthesevaluesrequire
chemicaladjustmentstoachievebalance.Thisformulaismoreorlessreliablebutnotguaranteed.Insomecases,
individualreadingsforpH,calcium,andalkalinitymightbebeyondnormalrecommendations,however,combined
withintheformulacanproduce“balancedwater.”TheSIisusefultopinpointpotentialwaterbalanceproblems.
pH:pHproducedbytheIntelliChlor(SC)isclosetoNeutralpH.However,otherfactorsusuallycausethepH
ofthepoolwatertorise.Therefore,thepHinapoolchlorinatedbytheIntelliChlor(SC)tendstostabilizeat
approximately7.8.ThisiswithinAPSPstandards.IfthepoolpHrisesabove7.8,haveapoolprofessionaltestto
seeifotherfactorssuchashighCalciumHardnessorTotalAlkalinityarethecauseandthenbalanceaccordingly.
pH Level Test: TestthepHlevelofyourpoolwaterwithareliabletestmethod.Ifnecessary,adjustaccordingto
yourpoolprofessional’srecommendations.APSP’srecommendedidealrangeforpHis7.4to7.6.Note:Neveruse
dryacid(sodiumbisulfate)toadjustpHinaridgeographicareaswithexcessiveevaporationandminimaldilution
ofpoolwaterwithfreshwater.AbuildupofbyproductscandamagetheIntelliChlor(SC).
Calcium Hardness: Recommendedrangeforcalciumhardnessis200-400ppm.CalciumHardnesslevels
shouldbetestedweekly.Calciumhardnessisthecalciumcarbonatescaledepositedonpoolsurfaces.The
testforCalciumHardnessisameasureofhow“hard”or“soft”thewateristesting.“Hard”watercanhavehigh
levelsofcalciumandmagnesium.Iftheselevelsaretoohighthewaterbecomessaturatedandwillleave
calciumcarbonatescaledeposits(a“white-ish,”crystallizedroughspot)onanysurfaceinsidethepool.Ifthe
levelsaretoolow,thewaterbecomes“soft”andwillcorrodesurfacesinsidethepool.UseTSPorHydroquest
100tolowerCalciumHardnesslevelsthataretoohighoraddwatertothepoolwhichhasalowercalcium
hardnesscontent.Levelswhicharetoolowrequiretheadditionofcalciumchloride.
Total Dissolved Solids (TDS):AddingsalttopoolwaterwillraisetheTDSlevel.Whilethisdoesnotadversely
affectthepoolwaterchemistryorclarity,thepoolwaterprofessionaltestingforTDSmustbemadeawaresalthas
beenaddedtotheIntelliChlorsystem.TheindividualperformingtheTDStestmaythensubtractthesalinitylevel
toarriveataTDSlevelthatwouldbecompatibletoaTDSreadingforanon-saltwaterpool.
Total Alkalinity: APSP’srecommendedidealrangefortotalalkalinityis80to120ppmfor“gunite”and
concretepoolsand125-170ppmforpainted,vinyl,andberglasspools.Testlevelsweeklyandadjust
accordingtoyourpoolprofessional’srecommendations.Alkalinitycanbedescribedasabufferthatkeeps
pHinorder.pHdependsontheabilityofthealkalinityinthewatertowithstandthechangesinpH.Ifthe
alkalinityistoohigh,addingacid(similartopH)lowersthelevel.Addingabase(e.gsodiumbicarbonate)
whenalkalinityislow,raisesthelevel.Thelevelofalkalinityinthewaterisameasurementofallcarbonates,
bicarbonates,hydroxides,andotheralkalinesubstancesfoundinthepoolwater.
Cyanuric Acid:Cyanuricacidisneededinoutdoorpoolstohelptostabilizeandmaintainproperlevelsof
chlorine.90%ofunstabilizedchlorineisdestroyedbytheUVradiationfromthesunwithintwohours.Cyanuric
acidstabilizeschlorineinwaterfromUVdegradation.WhenusingtheIntelliChlor(SC),thecyanuricacidlevel
shouldbemaintainedbetween30-50ppm(50ppmmaximum).

Pentair EASYTOUCH PL4 Specifications

General

Brand	Pentair
Model	EASYTOUCH PL4
Category	Control Systems
Language	English