Operation
Fluid Cooler Cleaning:
Any 
Warningregular basis to minimize the growth of bacteria, including Legionella Pneumophila, to avoid the risk of sickness or death. Service personnel must wear proper personal protective equipment during decontami- nation. Do NOT attempt any service unless the fan motor is locked
out.
Operators of evaporative cooling equipment, such as closed circuit fluid coolers, should follow maintenance programs which will reduce to an ab- solute minimum the opportunity for bacteriological contamination. Public Health Service officials have recommended that “good housekeeping” procedures be followed, such as: regular inspections for concentrations of dirt, scale, and algae; periodic flushing and cleaning; and the following of a complete water treatment program including biocidal treatment.
The visual inspection should take place at least once a week during the operating season. The periodic flushing and cleaning should be done before and after each cooling season, but in any event at least twice a year. The drift eliminators, easily accessible surfaces and the coil should be flushed by use of a
Blowdown:
A fluid cooler cools water by continuously causing a portion of it to evaporate. Although the water lost by evaporation is replenished by the makeup system, it exits the tower as pure
In order to achieve water quality which is acceptable to the fluid cooler, the selected water treatment company must work from a relatively constant level of concentrations. This stabilization of contaminant concentrations is usually accomplished by blowdown, which is the constant discharge of a portion of the circulating water to waste. As a rule, acceptable levels on which to base a treatment schedule will be in the range of
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