12
A
HD-Patronendruckschalter ACB 36-29bar
M74360
HD-Patronendruckschalter ACB 36-29bar
M74360
ND-Schalter
Patronendruckschalter-ACB-3-6bar
M74358
Frostschutzthermostat TR-1-F-U
M26386
Expansionsventil E3V65SSS10
1104804
Schauglas Parker SA-17s
1103757
Filtertrockner DML 417s 22mm Löt
1106182
A (1 : 5)
ND-Schalter
Patronendruckschalter-ACB-3-6bar
M74358
EN/09.2017/G44 © STULZ GmbH – all rights reserved
cybercool indoor chiller original instructions
3.4 Refrigeration circuit
Filter dryer
Sightglass
HP switch
Oil sight glass
Version A/G
In units of the A version, an external air-cooled condenser must be connected to the open refrigeration circuit
of the unit.
Version A/G:
The unit is eqipped with an electronically controlled hotgas bypass for the proportional capacity control in the
range of 40 to 100% of the nominal cooling capacity. The hotgas bypass valve is commanded and propor-
tionally controlled by the C7000 controller.
Version GE:
The above described capacity control by an HGBP valve can be obtained as an option.
Monitoring devices
The refrigeration circuit is equipped with various safety devices to avoid malfunctions. In the liquid line there
is a filter drier to separate humidity and a sight glass to check the sufficient charge of refrigerant. An oil sight
glass can be consulted to check the state and quantity of the ester oil charge in the compressor.
Safety devices
The refrigerant circuit is protected against insufficient evaporation pressure by a safety pressure limiter
(low-pressure switch). If the operating pressure is fallen below, a warning signal appears on the display and
the unit is put out of operation. A safety pressure cut-out (high-pressure switch) is triggered at 36 bar, switch-
es off the compressor and protects the refrigeration circuit against excessive operating pressure. Simultane-
ously a warning signal on the display of the controller appears.
A safety valve, which releases refrigerant at 40 bar, is fitted on A-units as further protection.
