Siemens SINAMICS S120 Equipment Manual page 271

Examples of the coolant temperature setpoint depending on the ambient temperature
This method is based on a high humidity (95%). The advantage is that only the ambient
temperature and the coolant temperature are required as actual values for the coolant
temperature control. A sensor for the humidity is not required.
③
④
Figure 9-18
The temperature difference ΔT
humidity up to 95%.
SIEMENS cooling units
Cooling units with a cooling capacity of 32, 48, 72 and 120 kW can be ordered from
SIEMENS.
Please contact your local Siemens office.
The cooling units in a Siemens control cabinet have a closed-control unit with a bypass valve
as protection against condensation. The risk of condensation can be minimized by manually
setting the coolant temperature using the Siemens control. Recognition of the danger of
condensation due to too high an ambient temperature in relation to the coolant temperature
is integrated as a warning to be issued.
Water-cooled chassis power units for common cooling circuits
Manual, 08/2017, 6SL3097-4AM10-0BP0
Cooling circuit, coolant properties and protection against condensation
Actual ambient temperature value
Adder for temperatures
Formation of the setpoint depending on the ambient temperature
should be 3° C. Condensation is therefore excluded for a
L
9.5 Examples of coolant control
271