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Revised 1-8-2007
3
Water Treatment
• The Delta Cooling Towers are manufactured from corrosion-resistant plastics which are resistant to water
treatment chemicals including common fungicides and bactericides.
• Follow appropriate water treatment practices as required and take frequent sample tests to avoid possible
water contamination. We also recommend water treatment maintenance as a measure of protection of the
environment in the vicinity of any cooling tower or other equipment open to atmosphere.
• To determine the appropriate water treatment practices for your particular application, it is suggested that
you contact a water treatment firm for their recommendation. A list of water treatment firms is available for
your reference. It is not necessarily complete nor do we recommend a specific firm. The list will be mailed to
you on request or consult your local yellow pages.
• Bleed-off is also important to water quality. Evaporation of the recirculated water does not remove the
dissolved solids that are present in the water. Without bleed-off, the continual buildup of these solids will
impair the proper functioning of the piping and other equipment in the system.
• A bleed line can be connected in any part of the system for routing to the sewer. Normally, it is most
desirable to make this connection in the hot water line at the cooling tower. A petcock type valve, installed in
the bleed line is recommended. Normally, bleed-off of 1% to 2% of the recirculation water flow is
satisfactory. The required amount of bleed-off water must be substituted with properly controlled amounts of
make-up water.
General Information
Safety
When handling, lifting, installing or operating the cooling tower, always employ safe work procedures,
according to best practices of the trade and according to applicable construction, electrical and safety standards,
regulations and codes.
Follow all safety practices described in these instructions.