SYSTEMP brochure
Technological innovations
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Indirect free cooling
The indirect Free Cooling system is characterised by a hy-
brid unit, consisting of a primary water circuit and a sec-
ondary direct expansion or chilled water circuit. The pri-
mary water circuit is connected to a dry cooler that uses
outside air - a source of renewable energy - to cool water.
The secondary circuit on the other hand exploits the me-
chanical cooling.
Optimized operating procedures
Depending on the outside air temperatures, three possi-
ble operating procedures are possible.
Total free cooling
The unit completely operates in Free Cooling without trig-
gering mechanical cooling (1).
Partial free cooling
In addition to operating the Free Cooling circuit, mechani-
cal cooling can be triggered for the time strictly necessary
to meet the demand for cooling (2).
No free cooling
Regulation is completely entrusted to mechanical cooling,
excluding the Free Cooling circuit.
Self-adaptive set-point of the dry cooler
In order to maximise the efciency of the Free Cooling
system, the unit can handle the regulation of the dry
cooler coupled to it directly. Thanks to the self-adaptive
set-point function, the fan speed can be regulated so that
the water always has a temperature consistent with the
outside air conditions.
This leads to an increase in the system efciency, allowing
you to maximise the performance of both the Free Cool-
ing circuit and the direct expansion circuit, ensuring low
condensing temperatures. In addition, the fans of the dry
cooler will partially operate even with high temperatures,
thereby increasing the energy savings of the system (3).
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