Maintaining The Cooling Circuit; General Information - Siemens SINAMICS S120 Manual
Cabinet modules liquid cooled
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- Function manual (1094 pages) ,
- Diagnostic manual (947 pages) ,
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Maintenance and servicing
7.4 Maintaining the cooling circuit
7.4
Maintaining the cooling circuit
7.4.1
General information
Note
Recommended cooling circuit service
The following service is recommended for the cooling circuit:
• 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.
• It is recommended that you contact the coolant additive manufacturer to analyze the
liquid coolant.
• If the coolant level has dropped, the loss should be corrected on closed or semi-open
circuits with a prepared mixture of coolant basis and antifreeze, see Chapters Coolant
properties (Page 122) and Antifreeze, biocides, inhibitors (Page 124). For Heat
Exchanger Modules and the cooling unit, the same specifications apply for the coolant
and antifreeze.
Note
Flushing the cooling circuit
"Flushing the cooling circuit" involves the following process:
1. Drain the old coolant from the cooling circuit
2. Fill the cooling circuit with fresh coolant
3. Operate the cooling circuit for some time (up to approximately 1/2 hour)
4. Drain the coolant again and clean the filter
5. Fill the cooling circuit with fresh coolant
Note
The operating instructions of the component manufacturer must be observed when
maintaining the cooling circuit.
238
Cabinet Modules liquid cooled
Equipment Manual, 04/2020, A5E37067587A
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