GEA Bock HG12e CO2 - Manual (Page 21)

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6| Commissioning
6.8 Avoiding slugging
To prevent slugging:
The complete refrigeration system must be properly designed.
All components must be compatibly rated with each other with regard to output
(particularly the evaporator and expansion valves).
Suction gas superheat at the compressor input should be min. 15 - 25 K. (Check the setting
of the expansion valve).
The system must reach a state of equilibrium.
Particularly in critical systems (e.g. several evaporator points), measures are recommended such
as replacement of liquid traps, solenoid valve in the liquid line, etc.
There should be no movement of coolant whatsoever while the compressor is at a standstill.
ATTENTION Slugging can damage the compressor and cause refrigerant to
leak.
6.9 Connection of oil level regulator
The connection "O" is provided for installing an oil level regulator. A corresponding adapter must be
obtained from the trade.