9
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. The fan
motor bearings for motors up to 30 kW are lubricated for the lifecycle of the bearings, higher motor powers
require relubrication (please see motor manual for more detail). All fan motors are supplied with 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
Lubricate the fan shaft bearings every 1,000 hours of operation or every three months for induced draft units.
Lubricate the fan shaft bearings every 2,000 hours of operation or every six months for forced draft units. Use
any of the following synthetic waterproof, inhibited greases which are suitable for operation between -40°C
and 120°C. (For colder operating temperatures, contact the factory).
Chevron - Multifak Premium 3
Total - Ceran WR2 or similar
Shell Alvanias
Feed grease slowly into the bearings or the seals may be damaged. A hand grease gun is
recommended for this process. When introducing a 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.
Unit Description
Location of Lube Line Fittings
Induced Draft Units – 2,4 m wide
Located just beside the fan casing
access door
Induced Draft Units – 2,6 m wide
Located just beside the fan casing
access door
Induced Draft Units – 3 m wide and 6 m wide
Located inside the fan casing
access door
Induced Draft Units – 3,6 m wide and 7,2 m wide
Located inside the fan casing
access door
Induced Draft Units – 4,2 m wide and 8,4 m wide
Located inside the fan casing
access door
LSTE Forced Draft Units
Located on the front of the unit
LPT Forced Draft Units
Located on the front of the unit
PMTQ Forced Draft Units
Located on the front of the unit
Table 1 – Location of Grease Lube Line Fittings for Belt Driven Units
Please note, the removal of the fan screens is not necessary on forced draft units
to access the extended lube line fittings.
Summary of Contents for AT 110-112
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