Siemens SIMOTICS DC 1HS7 Operating Instructions Manual page 34

Preparations for use
4.9 Transport and storage
Protecting the cooling circuit against corrosion
You protect the cooling circuit against corrosion when the machine has already been in
operation and is then placed in storage or put out of operation. Also observe the information
in the operating instructions supplied by the manufacturer of the cooler.
1. Completely drain the cooling ducts. To be completely certain, use compressed air to clean
2. Flush the cooling water ducts with a corrosion-protection emulsion to avoid the buildup of
34
the cooling water ducts so that they are completely empty.
rust.
SIMOTICS DC 1HS7
Operating Instructions 02/2016