Specifications

Appendix-b Cooling System Help
November 11, 2013
b‐4
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Repairsforaleakoriginatingatathreadedjointmaybeinitiallyattemptedbytighteningtheaff ectedjointwithout
drainingthesystem.Ifthistighteningeffortdoesnotcorrecttheproblem,thenthesystemmustbedrained,the
problemareaopenedandreplumbedasnecessary,followedbyasystemrefilland
test.
b. Probablythesinglemostimportantmaintenancestep:Inspectthebottomoftheheatexchangerbi‐
monthly.Inspectthecoilitselfforanydebristhatmayhavebecometrappedonthecoilface.Thiswould
blockairflowand decreasecoolingefficiencyoftheheatexchanger.Debriscanberemovedusinga
hose
andpressurizedwatersystem.Industyenvironmentsorareaswhereanabundanceofvegetationispresent
thisinspectionwillberequiredweekly
c. Toachieveevenusagetimeperunitandascertainthatback‐upintegrityexists,itisrecommendedthatthe
pumpsinthepumpmoduleareoperatedalternatelyonemonthatatime.
d. Checkthepumpmodulepressuregaugetoensurethataconsistentstablepressureisindicated.
e. Inspectandcleanthefiltrationloop.
f. Checkflowrate.
g. Perthecommentincludedinb.2.3StandardCoolantPlumbingPracticessection,mandateacontinualdisci‐
plineofNOTallowingplumbingpipe,fittings,etc.,tobewalkedon.
h. Thesystemmustbeanalyzedforglycolconcentration,annually.Analysiscanbeprovidedbytheglycol
manufacturerorviauseofananalyticaltestkitsuppliedthroughthemanufacturer.
i. Seedocumentationfordetailedmaintenanceinstructions.
b.3.1 Reserve Coolant Supply
Asufficientreservesupplyofcoolantandcorrespondingdeionizedwatershouldbekeptonhandtorefilltheentire
systemintheeventofamajorleak.
b.3.2 Clean-Up Plan
Aplanforcontainmentandspillclean‐upacceptabletolocalenvironmentalregulationsshouldbeconsidered.
b.3.3 Operating Environment
Ambientairtemperaturesneartheheatex changerdrycoolershouldnotriseabove45°Cfortypicalinstallations.
b.3.4 Measuring Specific Gravity
SpecificgravitycanbemeasuredwithaconventionalfloathydrometerandjaroraMISCODFR200(orequivalent)
digitalrefractometertoverifythe50/50mixture.
b.4 Heat Transfer Solutions
b.4.1 Ethylene Glycol
CommercialGrade"DowthermSR‐1InhibitedEthyleneGlycol‐basedHeatTransferFluid"istherecommendedheat
transferfluidtobeusedfortheliquidportionofthecoolingsystem.SR‐1canbepurchasedfromHarrisin55Gallon
lotsusingthefollowingpartnumber:
051‐1010‐002‐SR‐1,100%concentrate
Automotivegradeantifreezeisnotrecommendedduetothesiliconadditiveswhichcancauseincompatibility
problemswithpumpsealsandothercomponentswithinasystem.
Duetoatendencyoftheglycoltobreakdownovertimewhenmixedwithchlorinatedwater,itisrecommendedthat
distilledwaterbeusedforthesolution.
Thelifeexpectancyofa“SR‐1”systemcanbeaslongas10‐15yearsforacleansysteminstalledandmonitoredper
therecommendedprocedures.
Glycolsareexcellentpenetrants.Systemstestedwithwaterandcheckedtobetightsometimeswillleakwhenglycol
solutionsarethenadded.Recheckthesystemforleaksafterinstallingthe glycolmixture.