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Start-Up
EXCESSIVE VIBRATION MUST BE CORRECTED TO
PREVENT BEARING AND SHAFT DAMAGE. SEE THE
SECTION TITLED “TROBLESHOOTING” FOR DETAILS
ON THE COMMON CAUSE FOR VIBRATION.
Fan RPM can be determined by using a strobe-type
tachometer, or revolution counter.
Align the fan motor sheaves by using a straightedge. The
straightedge must be long enough to span the distance
between the outside edges of the sheaves. For more details,
refer to maintenance section.
Excessive Vibration
Determine Fan RPM
Sheave Alignment
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