Greenheck QEI-L - Optional Features; Sure-Aire Flow Monitoring and Sound Vault

8
Optional Features
TheSure-Aire™flowmonitoringsystemmeasuresfan
flowwithina3%accuracy.Unliketraditionalflowprobes
mountedinthefanventurithatcreateasystemeffect
hinderingfanperformance,Sure-Aire™doesnotinterfere
withairflowandwillnotimpactthefan’sairorsound
performance.Thisoptionisavailableonallmixedflowfan
modelsandshipscompletelyassembledfromourfactory.
Anelectronicspackagewithpressuretransmitterand
digitalreadoutisavailablewiththeSure-Aire™system.The
electronickitsareavailablefor50or60Hzpowersupplies
andprovidea4-20mAoutputthatcanbetiedintothe
building’sautomationsystem.
Sound Vault Housing - Radiated Sound Enclosure
Thesoundvaulthousingisanexcellentproductforfansthatwillbepositionedadjacenttoanoccupiedwork
spaceorinsoundcriticalapplications.Itlocksinradiatedsoundfromthefancasing,motoranddrives,and
minimizesvibrationtransmission.Standardconstructionincludesanacousticallylinedhousing,integralspring
isolators,andinternalflexibleconnectionsatthefan’sinletandoutlettoeffectivelyisolatethefanfromthe
system.Verticalorhorizontalmountingconfigurationsareavailable.
Why use a Sound Vault?
• Soundpowerattenuationlevelsdeterminedby
soundintensitytestsonactualunits
• Shipsfullyassembledwithfan
• Internalisolationtolimitbreakoutnoise
• Accesspanelsforinspectionoffanandmotor
• Bearinglubricationlinesextendedtooutsideof
enclosure
• Formedmountingrailswithprepunchedholes
foreasyinstallation
• AvailableonbothQEI-IandQEIDthrough
size27fans
Thistableliststheradiatedsound
reductionsfromtotalsoundpower
levelsforeachoctavebandwith
thesoundvaulthousing.
Sound Sensitive Areas
Sure-Aire™
CenterFrequencies[Hz] 63 125 250 500 1000 2000 4000 8000
AttenuationValue(dB) 13 20 25 31 34 35 36 36