Installation, Operation & Maintenance Manual
IM-995
19
Optional Accessories (cont.)
5. Outlet Dampers — Outlet dampers are usually provided
completely assembled like the inlet dampers. The damper is
bolted to the fan discharge for volume control.
6. Shaft Cooler — Also referred to as “heat slingers” or “cooling
impellers,” these are small, radially bladed aluminum
impellers that are split and bolted for installation between
the inboard bearing and fan housing. The cooling fins face
the bearing for grease applications and away from the
bearing for oil applications to prevent oil from being drawn
out of the bearing.
7. Anti-Rotation Clutch
operated in the wrong rotation. Run the motor uncoupled
from the fan to establish the proper rotation.
8. Oil Lubrication:
Static Oil – Warning: Some fans are supplied with oil lubricated
anti-friction bearings due to customer preference. Some fans
are supplied with oil as the fan speed exceeds that which
is acceptable for grease. Consult with the factory before
changing lubrication from oil to grease.
a. Use non-detergent turbine oil specified on the fan's
general assembly drawing.
b. Oil level should be half way up the bottom rolling element.
If leakage occurs, lower the oil level by 2-3 mm.
c. A breather should be used to equalize pressure, which
reduces oil leakage.
d. If a heat slinger is supplied, place vanes facing away from
the bearing to prevent oil from being drawn out of the
bearing.
e. Change oil regularly if automatic oilers are not being used.
Oil condition depends upon operating temperature, hours
of operation, moisture, environmental cleanliness and
overall vibration. Start at three month intervals and adjust
interval based on the condition of the used oil. Clean the
breather at this time.
f. If removing the bearing cap, prior to reinstalling, clean
the splits and apply a thin coat of Permatex in order to
minimize leakage.
g. Set up automatic lubricators according to instructions
supplied with the fan.
h. Prior to start-up, be sure that the oil has been heated to a
minimum of approximately 50° F.
Static Oil
Lubrication System
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