Esco Ascent max - Contaminated Lab; Excessive Fan Noise

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DuctlessFumeHoods
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Motorfailure
• Checkthemotor.Ifmotorisnotrunning,referto‘Blowerdoesn’tfunction’problem.
• Ifmotorisworkingproperly,proceedtonextstep.
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Problem4:ContaminatedLab
Cause  CorrectiveAction
Lowairflow
• Adjustthemotorspeedcontrollertogettheoptimumairflow.
Leakingfilters
• Changethefilters.
• Re‐certifythecabinetafterthenewfilterhasbeeninstalled.
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Problem5:ExcessiveFanNoise
Cause  CorrectiveAction
Resonance
• SeeComponentLayoutAorBtolocatethemotorspeedcontroller.
• Increasethemotorspeedby5–10VAC.Checkwhetherthenoisedisappears.Ifthe
noiseisalreadygone,measuretheactualairflowvelocity.
o Ifthevelocityisstillintheacceptablerange,maintain
it.
o Ifvelocityisoutofacceptablerange,orifnoisepersists,gotonextstep.
Loosedmotoror
impellerwheel
mounting
• RefertoProblem2‐FaultyCapacitorsection,tocheckthecapacitor,andreplaceif
necessary.
• Openthebloweraccesspanel(seefigure5‐1)andcheckiftheblowermounting
boltshavebeenfullytightened.
• Alsocheckwhetherthemotorcanrotate
properlyandnotloosed(seefigure5‐2).
• Ifmotorisphysicallydamaged,replaceit.
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Figure3‐2SensorBackPanelAccess
Figure3‐3
Figure5‐1
Figure5‐2