CAUTION
Danger of injury caused by spray water
The coolant is harmful to eyes and skin and can damage surfaces.
If the air escapes intermittently, coolant spray can reach your skin or eyes.
Therefore,
wear appropriate protective clothing for all work on the converter. However, if your
eyes or skin do come into contact with coolant, rinse the affected area thoroughly with tap
water as soon as possible. If coolant has escaped, remove the liquid from the affected
surfaces.
Please refer to the EU safety data sheet of the coolant manufacturer.
Note
You can find additional notes in the "SINAMICS S120 Power Units Chassis Liquid Cooled/
Cooling
Circuit and Coolant Properties and Condensation Protection/Commissioning" Manual.
Checking the system standstill pressure
The system standstill pressure falls significantly when the system is vented. Continue filling
coolant
into the system via the drum pump until the system standstill pressure is approx. 2.5 bar.
Completing venting
● Vent the pumps and components and refill with short pauses several times.
● Allow the system to stabilize a short time after each venting so that the air can collect at
the highest points. Because the coolant is viscous, the air bubbles only gather at the highest
points slowly and with difficulty.
6.2.3 Commissioning
Proceed as follows to commission the cooler:
1. Switch on the cooling unit power supply.
2. Commission the cooling unit in accordance with the manufacturer's operating instructions.
Note
Please always read the operating instructions of the cooling unit.
3. Switch the cooling unit from automatic operation to manual operation.
Commissioning
6.2 Commissioning the cooling unit
Applications for Cabinet Modules, liquid cooled
Operating Instructions, 04/2015, A5E35974555A 99
Siemens Drives & PLCs
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