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

5.2

Coolant for the internal deionized water circuit

5.2.1

Coolant properties

The coolant must fulfill the following requirements over the long term.
The coolant comprises a coolant basis and antifreeze, seeAntifreeze + biocide (Page 118).
Table 5- 3 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 for analyzing 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 mould spores,
the cooling circuit must be cleaned and refilled.
To better explain the coolant recommendations in this document, a number of problems
which can be encountered if the recommendations are ignored are listed in the table below.
Cabinet Modules liquid cooled
Manual, 10/2015, A5E37067587A
ISO 3696 water for analytical purposes, quality 3 with the following properties:
5.0 ... 7.3
< 5 µS/cm
< 0.4 mg/l
< 2 mg/kg
Commissioning the cooling circuit
5.2 Coolant for the internal deionized water circuit
117