ABB ACS880-304LC Series Hardware Manual page 117

Note: PVC hoses are not suitable for use with antifreeze.
• rubber gasketing NBR (nitrile rubber).
WARNING!
If you connect external piping to the internal cooling circuit, use only
materials that are specified above. Other materials can cause galvanic
corrosion. If the external piping contains other materials, use a cooling
unit with a heat exchanger (for example, ACS880-1007LC) to keep the
external piping separate from the internal cooling circuit.
Internal cooling circuit 117