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Fan System
The fan systems of both centrifugal and axial driven units are rugged; however, the fan system must be checked regularly and lubricated at
the proper intervals. The following maintenance schedule is recommended.
Fan Motor Bearings
EVAPCO evaporative cooling units use either a T.E.A.O. (Totally Enclosed Air Over) or a T.E.F.C. (Totally Enclosed Fan Cooled) fan motor.
These motors are built to "Cooling Tower Duty" specifications. They are supplied with permanently lubricated bearings and special
moisture protection on the bearings, shaft and windings. After extended shut-downs, the motor should be checked with an insulation
tester prior to restarting the motor.
Fan Shaft Ball Bearings
For induced draft units, lubricate the fan shaft bearings every 1,000 hours of operation or every three months. For forced draft units,
lubricate the fan shaft bearings every 2,000 hours of operation or every six months. Use any of the following synthetic waterproof, polyurea
inhibited greases which are suitable for operation between -20°F and 350°F. (For colder operating temperatures, contact the factory).
Feed grease slowly into the bearings or the seals may be damaged. A hand grease gun is recommended for this process.
When introducing new grease, all grease should be purged from the bearings.
Most EVAPCO units are supplied with extended grease lines to allow easy lubrication of the fan shaft bearings as shown in Table 1.
Unit Description
Induced Draft Units:
3', 4', 8', 8.5', 17' wide
Induced Draft Units:
10', 12', 14', 24', 28' wide
Forced Draft Units
PHC Units
Mobil – Polyrex EM
Table 1 – Location of Grease Lube Line Fittings for Belt Driven Units
Chevron - SRI
Timken Pillowblock Grease
Location of Lube Line Fittings
Located just beside the fan casing
access door
Located inside the fan casing
access door
Located on the bearing support or
on the side of the unit
Located inside access door at bottom of
casing/above the field seam
11
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