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Operating and Maintenance Instructions – Preparation and maintenance of the water in recooling systems
Rittal Liquid Cooling Package Plus
Appendix 2
Preparation and
maintenance of the water in
recooling systems
Depending on the type of installation to be cooled, certain purity requirements
are placed on the cooling water in a recooling system. According to the level of
contamination and the size and design of the recooling systems, a suitable pro-
cess is used to prepare and/or maintain the water. The most common types of
contamination and frequently used techniques to eliminate them in industrial
cooling are:
Tab. 18: Cooling water contaminants and treatment procedures
Type of impurity
Procedure
Mechanical contamination
Filter the water using:
Mesh filter, sand filter, cartridge filter, precoated
filter, magnetic filter
Excessive hardness
Soften the water via ion exchange
Moderate content of mechani-
cal contaminants and harde-
ners
Treat the water with stabilisers and/or dispersing
agents
Moderate content of chemical
contaminants
Treat the water with passivators and/or inhibitors
Biological contaminants, slime
bacteria and algae
Treat the water with biocides
Note:
For the proper operation of a recooling system that uses water on at least
one side, the composition of any additive used or system water should not
deviate substantially from hydrological data presented in Chapter 14.1, "Hy-
drological information".
