Cooling Water - Siemens SIMOTICS T-1FW3 Configuration Manual

3.1.3

Cooling water

Table 3- 6
Chloride ions
Sulfate ions
Nitrate ions
pH value
Electrical conductivity
Total hardness
Dissolved solids
Size of entrained particles
Corrosion protection
Anti-freeze protection
Biocide
The risk of corrosion caused by microbes is virtually non-existent in chlorinated drinking
water systems.
Closed cooling circuits with soft water are susceptible to microbes.
The following types of microbes are encountered in practice:
● Slime-forming bacteria
● Corrosive bacteria
● Iron-depositing bacteria
The suitability of a biocide depends on the type of microbe.
● Analyze the cooling water for microbes at least once a year.
Necessary biocides can be obtained from the manufacturer, e.g. Nalco. Ask the
manufacturer for compatibility with an inhibitor used in your system.
● Dose the biocide as recommended by the manufacturer.
Antifrogen N already acts like a biocide at the minimum concentration of > 20%.
Note
Compatibility of coolant additives
Biocides and Antifrogen N must not be mixed.
There are other manufacturers of chemical additives in the market. You can use equivalent
products from other manufacturers. Have the suitability of the third-party products
determined.
1FW3 complete torque motors
Configuration Manual, 08/2020, A5E46027705B AA
Water specification as coolant
Quality of the water used as coolant for motors with alumi-
num, stainless steel tubes + cast iron or steel jacket
< 40 ppm, can be achieved by adding deionized water.
< 50 ppm
< 50 ppm
6 ... 9 (with aluminum 6 ... 8)
< 500 μS/cm
< 170 ppm
< 340 ppm
< 100 μm
0.2 ... 0.25% inhibitor Nalco TRAC100 (previously 0GE056)
If necessary 20 ... 30% Antifrogen N (manufacturer Clariant)
Mechanical properties
3.1 Cooling
47