Filling The Cooling Circuit - Siemens SINAMICS S120 Operating Instructions Manual

Observe the technical data in Chapter: "Converter ambient conditions".
NOTICE
Risk of short-circuit
Condensation in the converter circuit caused by condensate can cause short-circuits in the
converter and damage parts of the converter.
Only change the factory setting of the coolant temperature when absolutely necessary. You
must always maintain the permitted temperature ranges.
NOTICE
Risk of short-circuit
If you operate the cooling system without converters, the temperature of the cooling liquid
can fall below the ambient temperature. The cooling liquid can condense at electrical
components and cause a short-circuit.
Always operate the converters and the cooling system together.
Note
If the temperature of the coolant exceeds 45° C, this can result in derating of the converter.
6.2.2

Filling the cooling circuit

Observe the five safety rules (Page 93).
The commissioning requires a drum pump and a 1/2" hose. Because the coolant is delivered
in 50 l drums, we recommend the use of a drum pump that produces a pressure of 3 bar.
Note
The drum pump is not included in the scope of delivery.
A filling set (consisting of a drum pump, hoses and ball cocks) can be ordered from the
manufacturer of the cooling unit.
For additional information, refer to the operating instructions of the cooling unit.
1. Close all vent cocks and drain cocks.
2. Connect the drum pump with the hose to the filling connections of the cooling unit.
3. Open all ball cocks in the cooling unit.
4. Using the drum pump, pump the coolant into the cooling circuit until the pressure
manometer shows approx. 2.5 bar. To observe the pressure manometer on the expansion
vessel, depending on the version, swivel the pressure manometer from the switch box as
appropriate for the cooling unit version.
Siemens Drives & PLCs
Applications for Cabinet Modules, liquid cooled
Operating Instructions, 04/2015, A5E35974555A
Commissioning
6.2 Commissioning the cooling unit
95