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Pos: 3 1.44 / Übers chrifte n/1. 1/Frost -, Korrosionsschutz @ 54\ mod_120 72963 1997 3_18. docx @ 6081 85 @ 2 @ 1
5.7
Antifreeze and anti-corrosion agents
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Setting Up
If aluminium is used in the external water circuit, there is a risk of corrosion. In order to
avoid electrochemical corrosion, it must be checked whether the materials that are used
in the cooling module are compatible with the materials of the external cooling circuit.
The type and dose of a suitable anti-corrosion or anti-freeze agent depends on the
situation on site and also on the external re-cooling system. It must be determined by the
system planner.
The following materials are used in the cooling module.
•
copper
•
bras
•
stainless steel
•
gunmetal
In order to protect the components in the system circuit against corrosion and frost
damage, the system circuit must be filled with an anti-corrosion and anti-freeze agent.
Frost damage may be caused by contamination, air that is trapped inside the system, or by
a pump malfunction.
Notice
Damage to components
If the concentration of anti-corrosion or anti-freeze agents is too high or too low in the
circuit, components may be damaged (e.g. the seals). If the concentration is too low, the
corrosion may actually be stimulated.
When using anti-corrosion or antifreeze agents, please comply with the information
provided by the manufacturers concerning the area of application, the compatibility with
other materials, and the minimum/maximum mixing ratio, etc.
When using monoethylene glycol as the anti-corrosion and anti-freezing agent, please
observe the following points:
•
Do not mix anti-corrosion and anti-freezing agents of different manufacturers.
Document the name and type of the anti-corrosion and anti-freezing agent that is
used.
•
For filling the system control circuit with anti-corrosion and anti-freezing agents,
we recommend mixing the liquids in advance with the aid of a filling pump.
Note
In order to ensure the trouble-free operation of the unit, the water quality requirements
as stated in the "Technical data" section must be fulfilled.
VARISTAR Cooling unit SHX 30
39
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