9
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 cold water basin 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 le open.
5
. The fan sha bearings and motor base adjusting screws should be lubricated. This should also be performed if the unit
is going to sit idle prior to initial start-up.
6. The make-up water supply, overflow and drain lines, as well as the recirculating pump and pump piping up to the
overflow level must be heat traced and insulated to account for any residual water.
7. The finish of the unit should be inspected. Clean and refinish as required.
8. The fan, motor and pump bearings need to be turned at least once a month by hand. This can be accomplished by
making sure the unit’s disconnect is tagged and locked out, and grasping the fan assembly, rotating it several turns.
9. Energize fan motor space heaters.
10. Closed Circuit Coolers only - If the recommended minimum fluid flows through the heat transfer coil cannot be
maintained, and an anti-freeze solution is not in the coil, the coil must be drained immediately whenever the system
pumps are shut down or flow stops during freezing conditions. This is accomplished by having automatic drain valves
and air vents in the piping to and from the cooler. Care must be taken to ensure that the piping is adequately insulated
and sized to allow the water to flow quickly from the coil. This method of protection should be used only in emergency
situations and is neither a practical nor recommended method of freeze protection. Coils should not be drained for an
extended period of time, as internal corrosion may occur. See Cold Weather Operation section of this document for
more details.
See fan and pump manufacturer maintenance and long term storage instructions for more detailed instructions.
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