7
Operation and Maintenance Instructions
Seasonal Shut-Down Checklist
When the system is to be shut down for an extended period of time, the following services should be performed.
1. The evaporative cooling unit should be drained.
2. The cold water basin should be flushed and cleaned with the suction strainer screens in place.
3. The suction strainer screens should be cleaned and re-installed.
4. The cold water basin drain should be left open.
5. The fan shaft bearings and motor base adjusting screws should be lubricated.
6. The water make up valve needs to be closed. All water make-up piping needs to be drained, if not heat traced and
insulated.
7. The finish of the unit should be inspected. Clean and refinish as required.
8. The fan bearings and motor bearings need to be turned at least once a month by hand. This can be accomplished by
making sure the unitʼs disconnect is locked and tagged out, and grasping the fan assembly, rotating it several turns.
9. Energize motor space heaters.
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
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, polyurea inhibited greases which are suitable for operation between -20°F and 350°F. (For colder operating
temperatures, contact the factory).
Mobil – Polyrex EM Chevron - SRI
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.
All EVAPCO units are supplied with extended grease lines to allow easy lubrication of the fan shaft bearings.
To Next Page
Loading...
Need help?
General
