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Water Treatment
including Legionella, which could be harmful if inhaled or ingested. Personnel exposed directly to the
discharge airstream and the associated drift mists, generated during operation of the water distribution
system and/or fans, or mists produced by high pressure water jets or compressed air (if used to clean
components of the recirculating water system), must wear respiratory protection equipment approved for
such use by governmental occupational safety and health authorities.
NOTE: Since the quality of the ambient air and make-up water varies significantly from job site
to job site, BAC strongly recommends obtaining the services of a qualified water treatment
specialist prior to the initial start-up of the evaporative cooling equipment. Additionally, to protect
against the risk of Legionella contamination, never operate the cooling equipment without
adequate biological control.
A proper water treatment program, administered under the supervision of a competent water treatment specialist, is an
essential part of routine maintenance to ensure the safe operation and longevity of evaporative cooling equipment, as well as
other system components.
In evaporative cooling products, cooling is accomplished by evaporating a small portion of the recirculating water as it flows
through the unit. As the water evaporates, the dissolved solids originally present in the water remain behind and if not
controlled, the concentration of dissolved solids will increase rapidly. This can lead to corrosion, scale or biological fouling
which may negatively affect heat transfer as well as the longevity of system components.
•
Corrosion – Red rust on steel components and white rust on galvanized surfaces may affect the longevity of system
components.
•
Scale Formation – Scale, typically a calcium or magnesium based build-up, not only reduces heat transfer and system
efficiency, but also may lead to under deposit corrosion. If scale is not controlled, it may continue building on critical
components such as the fill and severely impact thermal performance.
•
Biological Fouling – Slime and algae formations may reduce heat transfer, promote corrosion, and harbor pathogens
such as Legionella.
Vertex™ Evaporative Condenser Operation & Maintenance Manual – Corrosion Protection
: The recirculating water system may contain chemicals or biological contaminants,
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