Biocide Additive (If Required); Equipotential Bonding; Water-To-Water Heat Exchanger - Siemens SINAMICS S120 Equipment Manual

Internal Liquid Cooling

10.5 Biocide Additive (If Required)

10.5 Biocide Additive (If Required)
● Adding Nalco N 77352 (ONDEO Nalco; http://www.ondeonalco.com) intermittently is
● When Antifrogen N anti-freeze is used with a concentration of 20% and higher, it can be
10.6

Equipotential Bonding

Equipotential bonding between the components in the cooling system is required (SINAMICS
S120, heat exchanger, piping, pump, etc.). This must be effected using a copper bar or
stranded copper with the appropriate conductor cross-sections to prevent the
electrochemical processes.
All cabinets must be bolted together in such a way as to ensure good conductivity (e.g.
cabinet beams directly connected to ensure conductivity) to prevent potential differences
and, in turn, avoid the risk of electrochemical corrosion. For this reason, a PE bar must also
be installed in all the cabinets, including the re-cooling system.
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recommended twice a month.
Required amount: 5 – 15 mg / 100 liter of cooling water. This product does not impair the
effectiveness of the corrosion inhibitor with Nalco 00GE056.
assumed that there is an adequate biocide effect.
Booksize cold-plate power units
Manual, (GH4), 03.2007, 6SL3097-2AJ00-0BP4