Internal Liquid Cooling; Cooling System Requirements - Siemens SINAMICS S120 Equipment Manual

Internal Liquid Cooling

9.1

Cooling system requirements

9.1
Open cooling systems must never be used. Only closed cooling systems - preferably with a
mechanism for monitoring the quality of the cooling water - must be installed.
The electrochemical processes that take place in a cooling system must be minimized by
choosing the right materials. For this reason, mixed installations (i.e. a combination of
different materials, such as copper, brass, iron, or halogenated plastic (PVC hoses and
seals)) should not be used.
The fittings and connections required in the cooling system must be made of stainless steel
(V2A or V4A steel; NIROSTA austenite).
The following materials can be used for the cooling system piping:
• Pipes and corrugated piping made of stainless steel (V2A or V4A steel; NIROSTA
• Hoses made of EPDM/EPDM with an electrical conductivity >109 ohm (e.g. Semperflex
• DEMITEL® hoses made of PE/EPDM (Telle; http://www.telle.de)
Equipment Manual Booksize Cold-Plate Power Sections
Manual, (GH4), Edition 06.2005, 6SL3097-2AJ00-0BP2
austenite)
FKD; Semperit; http://www.semperit.at)
Note
When non-conductive hoses are used, particular attention must be paid to the
equipotential bonding of all the components. See Corrosion Inhibitor Additive (Inhibiting).
Notice
The sealing materials must be free of chloride, graphite, and carbon particulate (Viton®
or EPDM).
Note
Once installed, the cooling system must be checked to ensure that it is properly sealed.
9
9-1