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Fan Related:
Fan speed/rpm is too high or too low to perform
properly – Incorrect wheel – Wheel rotating in reverse
direction – Motor undersized – Fan possibly damaged.

EXCESSIVE VIBRATION
Peerless Blowers
NOTICE 172 South Andrews Ave.
Hot Springs, NC 28743
Vibration occurs while the fan is running and is the Phone: 828-622-7500
most common problem during start-up. Excessive Fax: 828-622-3309
vibration is a serious issue and should not be
Email: salesteam@peerlessblowers.com
ignored. It can lead to structural and/or component
failure. If excessive vibration is apparent, shut down
the unit and attempt to pinpoint the source of the
vibration.

Possible Causes of Vibration:
Wheel imbalance - Bearing and drive misalignments –
Incorrect belt tension - Bent shaft - Mismatched or
damaged belts - Wheel or sheaves loose on shaft -
Loose mounting hardware - Loose or worn bearings
Motor out of balance - Sheaves eccentric or out of
balance – Worn or corroded wheel – Build-up of
material on wheel.
Centrifugal Fan Nomenclature:
Weather
Cover
Fan
Sheave
Bearings

Fan Shaft
Wheel
Impeller
Inlet Cove

Motor
Sheave Belt
Motor
Motor
Base
Inlet Ring
Pedestal
Upright Housing

PBOIPM-V05
REVISED 12/2018