Page 49 - 233423 - Exhaust Fans_Neat

Operation and Maintenance Manual Efficient Silent Inline Fan - ESI

aligned. Shimming of bearings may be
required to attain proper bearing and
shaft alignment. Also, the straightedge
should be laid across the full-length of
the bearing mounting plate to determine
if a crown exists. Shim each bearing
accordingly. Wheel clearances and split
housed bearing assembly tolerances must
be adhered to. PennBarry requires that for
any rotating assembly replacements, the
fan should be rebalanced.
Vibration Tolerances
All fans are dynamically balanced at the
factory before shipment. The dynamic
balance is made utilizing a PMC, IRD or
Schenck analyzer at the operating speed
if known, or the maximum RPM of the
unit. Measurements are taken off both
bearings in mil readings of displacement.
The readings will meet or exceed the
guidelines as established in AMCA Std.
204-96, "Balance Quality and Vibration
Levels for Fans." Final measurements
are recorded on PennBarry's inspection
copies. When motors and drives are not
provided by PennBarry, it will be necessary
for the customer to provide a trim balance
in the field.
Ordering Replacement Parts
When ordering replacement parts it is
necessary to provide PennBarry with the
serial number of the unit and/or the original
shop order number on which the fan was
ordered. Typical replacement parts are as
follows:
1. Wheel
2. Housing
3. Shaft
4. Bearings
5. Motor
6. Drives
When ordering replacement parts, specify
any required accessories, such as special
material, flanges and coatings. This will
assure that the replacement parts are
correct.

1401 North Plano Road, Richardson, Texas 75081
6 PENNBARRY Phone: 972.234.3202 ■ Fax: 972.497.0468