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SERIES 3000 COOLING TOWER

Cold Weather Operation

Inspection & Maintenance

BACproductscanbeoperatedatsubfreezingambienttemperaturesprovidedproper

operatingmethodsareestablishedanddiligentlyfollowed.

• Carryoutfrequentvisualinspectionsandroutinemaintenanceservicesduring

operationinsubfreezingweather.

• Ensureallcontrolsforcapacityandfreezeprotectionaresetproperlyandfunctioning

normally.

• Preventexcessivelyhighwaterlevelsandpossibleoverowofthecoldwaterbasindue

tooverpumping,cloggedstrainers,ormake-upvalvemalfunction.

• Someuniticingcanbeexpectedinverycoldweather.Usuallythiswillnoteffect

theoperationoftheunit.Resolveanyicingconditionsthatmaydamagetheunit

orthesupports,impairthesystemperformance,orcreateasafetyhazard.

Fan Section Icing Protection

Therearetwobasicoperationalmethodswhichcanbeusedtoprovidethesystem’s

requiredcooling:temperaturesettingandfancontrol.Themethodofcontrolemployedon

agivenapplicationdependsupontheclimaticextremeswhichareexpected,thevariations

inheatloadthatwillbeencountered,andthecompatibilityofthecontrolsystemwith

otherportionsoftheinstallation.

Insubfreezingambienttemperatures,effectiveicingcontrolmayrequireacombinationof

thesetwomethods.Operateeachunitwiththehighestthermalloaditcanhandle,rather

thanevenlydividingthetotalheatloadacrossallcells.Duringprolongedcoldweather

periods,bypasstheidleunitsanddrainthebasins.

Temperature Setting

Lowleavinguidtemperaturespromoteiceformation.Duringoperationinsubfreezing

ambienttemperatures,maintaintheleavingwatertemperatureashighaspossible.Ensure

theunitoperateswiththemaximumpossibleheatload.Therecommendedminimum

processuidtemperatureis43°F(6.1°C).

BAC 3872C User Manual

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