Air PreciseAIR PCA Series, Инструкция по установке, эксплуатации и обслуживанию

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IOM-PreciseAIR
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IMPORTANT
!!!
The proper amount of tension to apply to belts is the minimum necessary
to transmit the required power without slippage. To apply more tension
than necessary shortens the life of the belts and bearings.
4.7. Blower Bearings
For instructions covering, bearing assembly or disassembly, or installation details, contact AIR
Engineering. Any bearing which is disassembled should be kept separate from other bearing parts,
as components may not be interchangeable. Maintain cleanliness of components and bearings to
prevent bearing contamination.
Lubrication
Proper lubrication of bearings helps assure maximum bearing life. Fans are equipped with decals
indicating relubrication intervals for normal operating conditions. However, every installation is
different. The frequency of lubrication should be established accordingly.
Experience has shown that airborne moisture and heavy dust will dramatically reduce the life of
the bearing lubricant. If any of these adverse conditions exist, it is recommended that bearings be
regreased after several days of operation. Lubrication intervals can then be adjusted based on the
condition of the purged grease.
The figure below illustrates the decal for ball bearings, attached to the blower. Observation of the
condition of the grease expelled from unit ball or roller bearings at the time of relubrication is the
best guide as to whether regreasing intervals and the amount of grease added should be altered.
This observation is particularly important when bearings operate continuously over 160°F.
Greases are made with different bases. There are synthetic base greases, lithium base, sodium
base, etc. Avoid mixing greases with different bases. They could be incompatible and result in
rapid deterioration or breakdown of the grease.
All bearings are filled with grease before leaving the factory. When the fans are started, the
bearings may discharge excess grease through the seals for a short period of time. Do not replace
the initial discharge because leakage will cease when the excess grease has worked out.
Sometimes the bearing has a tendency to run hotter during this period and one should not get
alarmed unless it lasts over 48 hours or gets above 220ºF. When relubricating, use a sufficient
amount of grease to purge the seals.
Rotate bearings during relubrication where good safety practice permits.
Refer to technical bulletin TB-33 for bearings maintenance.