Air PreciseAIR PCA Series, Инструкция по установке, эксплуатации и обслуживанию

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IOM-PreciseAIR
Page 41 of 50
4.4. Water Cooled Condensers
Water cooled condensers are designed for maintenance-free operation. However, it is advisable
to clean the condenser cooling fluid tubes regularly. The contamination depends directly on the
quality of the cooling fluid used.
•
Materials in the cooling fluid in dissolved or solid form can be deposited inside the
condenser tubes (e.g. lime, sand, algae or silt).
•
Organic materials such as algae can build up local elements.
•
When seawater is used as cooling fluid, shells can also grow on the inner walls of the
tubes.
The accumulation of materials in the inner walls of the condenser tubes inhibits heat transfer
causing decline in performance and raising the system head pressure.
Cleaning
Suitable condenser tubes cleaning methods and cleaning intervals depend on the type and extent
of contamination.
Carefully brush off soft deposits such as algae or silt. Use a cleaning agent if necessary. Rinse well
afterwards.
Rinse solid coatings, such as lime or shell, with suitable solvent. The use of citric acid is very
effective and environmentally friendly. Fill the condenser tubes with 25% citric acid/ water
solution. Allow to react for 24 hours. During this period, occasional circulation by pumping
increases the effect. Afterwards, flush the released materials out of the pressure vessel.
Dispose all contaminants properly per local regulations.
Heads Removal
When a head is removed for cleaning, it is recommended to replace the sealing gasket. Consult
AIR for required gasket.
Observe the gasket orientation during assembly. Wrong gasket orientation will cause the
condenser not to perform properly due to improper cooling fluid flow.
Refer to technical bulletin TB-64 for information about the proper torque for the head bolts.
WARNING
Cleaning agents must not react with the tube material.
Cleaning should be performed by qualified personnel.
Biological hazard. May cause disease.