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© STULZ S.p.A. – all rights reserved EN/06.2016/i09
WSA ExplOrEr OriginAl inStructiOnS
The following sensors are installed in the chiller as standard
for each refrigerant circuit:
For each circuit:
• high and low pressure switch
to guarantee the safety
• high and low pressure transducer
to manage the compressors and the EEV
• sensor for discharge and suction gas temperature (PTC)
to manage the compressors
and the EEV
chilled water circuit:
• sensor for inlet and outlet water temperature (PTC)
to manage the set-point
• differential pressure switch
to guarantee the safety of the unit
• sensor for freezing temperature (PTC)
to guarantee the safety of the unit
Air temperatures:
• sensor for outdoor temperature (PTC)
to manage the free cooling
4.3.9 c2020
A graphical touch display is connected to the STULZ C2020 and installed in the door of the
electrical cabinet. It is able to show the information about the operation conditions, the status of
the unit and all the alarms. It is accessible from the outside. All features are password protected.
inFOrMAtiOn
To get more information about the C2020 please refer to the separate controller manual
4.4 piping diagrams
