Deltawillnotguaranteetheperformanceoftheproductsiftheapplicationcondition
fallsoutsidetheparameterssetforthinthespecification.
thisspecificationisrequired.
Pleaseexercisecautionwhenhandlingfans.Damagemaybecausedwhenpressureis
appliedtotheimpeller,ifthefansarehandledbytheleadwires,orifthefanwas
hard-droppedtotheproductionfloor.
Exceptaspertainstosomespecialdesigns,thereisnoguaranteethattheproductswill
befreefromanysuchsafetyproblemsorfailuresascausedbytheintroductionof
powder,dropletsofwaterorencroachmentofinsectintothehub.
Theabove-mentionedconditionsarerepresentativeofsomeuniqueexamplesandviewed
asthefirstpointofreferencepriortoallotherinformation.
6.
tisveryimportanttoestablishthecorrectpolaritybeforeconnectingthefantothe
powersource.Positive(+)andNegative(-).Damagemaybecausedtothefansif
connectioniswithreversepolarity,ifthereisnofoolproofmethodtoprotectagainst
sucherrorspecificallymentionedinthisspec.
Deltafanswithoutspecialprotectionarenotsuitablewhereanycorrosivefluidsare
introducedtotheirenvironment.
Pleaseensureallfansarestoredaccordingtothestoragetemperaturelimitsspecified.
Donotstorefansinahighhumidityenvironment.Wehighlyrecommendperformance
testingisconductedbeforeshipping,ifthefanshavebeenstoredover6months.
NotallfansareprovidedwiththeLockRotorProtectionfeature.Ifyouimpairthe
rotationoftheimpellerforthefansthatdonothavethisfunction,theperformance
ofthosefanswillleadtofailure.
10.Pleasebecautiouswhenmountingthefan.Incorrectmountingoffansmaycause
excessresonance,vibrationandsubsequentnoise.
Itisimportanttoconsidersafetywhentestingthefans.Asuitablefanguardshouldbe
fittedtothefantoguardagainstanypotentialforpersonalinjury.
Exceptwherespecificallystated,alltestsarecarriedoutatroom(ambient)temperature
andrelativehumidityconditionsof25oC,65%RH.Thetestvalueisonlyforfan
performanceitself.
Becertaintoconnectan“4.7µForgreater”capacitortothefanexternallywhen
theapplicationcallsforusingmultiplefansinparallel,toavoidanyunstablepower.
Application Notice
2.AwrittenrequestshouldbesubmittedtoDeltapriortoapprovalifdeviationfrom
Doc. No: FMBG-ES Form 001 Rev. 0001 Date: June 24, 2009