Coolant For The Internal Deionized Water Circuit; Coolant Properties - Siemens SINAMICS S120 Manual

Commissioning the cooling circuit

5.3 Coolant for the internal deionized water circuit

5.3 Coolant for the internal deionized water circuit
5.3.1

Coolant properties

The coolant must fulfill the following requirements over the long term.
The coolant comprises a coolant basis and antifreeze, see Antifreeze, biocides, inhibitors
(Page 124).
Table 5- 4 Coolant requirements
Basis coolant
pH value
Electrical conductivity
Components that can be oxidized
as oxygen content
Residue after vaporization and
drying at 110 °C
Note
Analyzing the liquid coolant
It is recommended that you contact the coolant manufacturer to analyze the liquid coolant.
The coolant should be checked 3 months after the cooling circuit is filled for the first time
and, subsequently, once a year.
If the cooling water becomes cloudy, is colored, or becomes contaminated by mold spores,
the cooling circuit must be cleaned and refilled.
122
Distilled, demineralized water (completely desalinated water) or deionized water with
reduced electrical conductivity according to ISO 3696, quality 3
or based on IEC 60993 with the following values:
5.0 ... 8.0
≤ 30 µS/cm (3 mS/m)
< 30 mg/l
< 10 mg/kg
Cabinet Modules liquid cooled
Equipment Manual, 04/2020, A5E37067587A