Siemens Sinamics S120 Manual page 806

Cooling circuit and coolant properties
13.2 Coolant requirements
The type of bacteria determines the suitability of a biocide. A water analysis must be carried
out once a year to determine the number of bacterial colonies. Suitable biocides are
available, for example, from Nalco.
Recommendation
Twice a month Nalco N 77352 is added intermittently. The dosing quantity is 5 to 15 mg/100
liters of cooling water. This product has no adverse effect on Nalco 00GE056 corrosion
inhibitor.
Note
The type of bacteria determines the biocide.
The manufacturer's recommendations must be followed regarding the dosage and
compatibility with any inhibitor used.
It is not permissible that biocides and Antifrogen N are mixed.
Antifrogen N has a biocidal effect even at the minimum required concentration of > 20%.
806
Booksize Power Units
Manual, (GH2), 04/2014, 6SL3097-4AC00-0BP6