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© STULZ S.p.A. – all rights reserved EN/06.2016/i01
WPA ExPlOrEr OrIGINAl INSTrUCTIONS
ized in V-shape modules. With having this type of condenser you avoid high pressure drops,
increase the heat transfer coefficient and reduce the amount of refrigerant needed.
For the free cooling model the MircoChannel is treated with a cataphoresis treatment which is
available for the base version as option.
4.3.7 Electrical Cabinet
The electrical cabinet is divided into a load section and a control section. In the door in front of
the control section you will find a touch display with a transparent protection panel. The load
section contains a power switch operable from the outside which locks the cabinet door when
switched on.
The protection degree of the electrical cabinet is IP54.
4.3.8 Sensors
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, EEV and fans
• 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
• sensor for free cooling inlet water temperature (PTC)
to manage the free cooling
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
