System Cleaning - BAC HXV Operation & Maintenance Manual

NOTE: Contact your local water
treatment specialist for assistance.
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• If the iron chips are not removed with the Scotch-Brite™ Products,
electro-chemical cleaning may be required. BAC uses commercially available
equipment for electro-chemical cleaning in the field.

System Cleaning

System Cleaning
With proper precautions, prior to start-up circulate an alkaline solution which can be used
to clean condenser or process water systems through a closed circuit cooling tower.
The necessary precautions include:
• Limit the duration of the cleaning to one day or at the most two days.
• The temperature of the solution should never exceed 100ºF (37.8°C).
• The maximum concentration of chemicals in the circulation solution should not
exceed any of the following:
–– 5% Sodium Hydroxide
–– 5% Sodium Metasilicate
–– 2% Sodium Carbonate
–– 2% Tetra Sodium Pyrophosphate
–– 0.5% Trisodium Phosphate
–– 0.5% Sodium Nitrate
–– 5-10% Butyl Cellosolve
Coil Cleaning for HXV Hybrid Coolers
The outside of the coils may require occasional cleaning. The chemicals used must
be compatible with the materials being cleaned. For example, the prime surface coil
is galvanized steel on the outside. The inside of the coil is black carbon steel. The dry
finned coil is copper with aluminum fins. The coil cleaning process and chemicals
must be selected to prevent damaging and corroding the coils. Damaged dry coil fins
may be straightened using a fin comb. Follow safe access procedures. For specific
recommendations on coil cleaning, contact a qualified consultant.