Commissioning The Cooling Unit; Anti-Condensation Measures - Siemens SINAMICS S120 Operating Instructions Manual

Commissioning

6.2 Commissioning the cooling unit

6.2 Commissioning the cooling unit
Note
Operating Instructions
For commissioning the cooling unit, observe its operating instructions. For cooling units
supplied by Siemens, the operating instructions can be found in the terminal box.
Note
Deviating values
When values in the associated operating instructions (e.g. pressure values) deviate from those
of the cooling unit, the values of the associated operating instructions apply.
Note
Requirements placed on the cooling water of the inner cooling circuit
You can find the requirements relating to the cooling water for the inner cooling circuit
(converter cooling water) in the "SINAMICS S120 Power Units Chassis Liquid cooled" Manual
in Chapter "Cooling circuit and cooling properties and condensation protection".
Note
Requirements placed on the cooling water of the outer cooling circuit
Requirements placed on the cooling water of the outer cooling circuit (raw water) of the cooling
unit supplied from Siemens is provided in Chapter "Technical data in Section "Specification of
the untreated water (Page 143)"
6.2.1

Anti-condensation measures

Warm air can condense for liquid-cooled converters. This condensation depends on the air
humidity and the temperature difference between the ambient air and the coolant. If converters
and the cooling system are operated together, the temperature of the system ensures that no
condensation occurs on electrical components.
Factory setting of the coolant temperature
The coolant temperature is set at the factory to 40° C with 60 seconds overrun. The cooling
system continues to run when the converter is switched off. The overrun of the cooling system
prevents condensation in the converter circuit and ensures a control range without derating.
Changes to the coolant temperature
To prevent condensation in the converter circuit, the following requirement must be satisfied:
ambient temperature ≤ coolant temperature < 45° C
94
Applications for Cabinet Modules, liquid cooled
Operating Instructions, 04/2015, A5E35974555A