Commissioning; Coolant Requirements; Coolant Properties - Siemens SINAMICS S120 Manual

Cooling circuit and coolant properties

13.2 Coolant requirements

13.1.6

Commissioning

Danger to life through electric shock due leaking coolant
Death or serious injury can result when coolant is touched that is at a specific voltage (i.e.
is live).
• Before venting, switch the plant or system into a no-voltage condition.
When commissioning the cooling water circuit, the following sequence must be observed:
1. Ventilate the heat sink the first time the devices are filled.
2. Remove the fixing glands located in front of the vent valve.
3. Perform ventilation.
4. Close the vent valve.
5. Screw the fixing glands tight again.
6. Check the seals.
7. Set the operating pressure according to the flow conditions of the cooling water system in
the supply and return lines.
8. Set the required cooling water flow rate per time unit.
13.2 Coolant requirements
13.2.1

Coolant properties

Properties of the cooling medium
Water or a water/anti-freeze mixture that meets the relevant requirements can be used as a
cooling medium. The cooling medium must be chemically neutral, clean, and not contain any
solids.
The cooling water must fulfill the following requirements over the long term:
Table 13- 2 Cooling water specifications
Properties
Max. Intake temperature (in operation)
Max. Coolant temperature
Operating pressure
778
WARNING
Liquid Cooled
Chemically neutral, clean,
free of solids
° C 45 (55 with derating)
° C 55
kPa 100 ... 600
Manual, (GH2), 07/2016, 6SL3097-4AC00-0BP8
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