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6| Commissioning
6.8 Avoid slugging
ATTENTION Slugging can result in damage to the compressor and cause
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 15 K. (Check the setting
of the expansion valve).
Regard oil temperature and pressure gas temperature. (The pressure gas temperature has to be
high enough min. 50°C, so the oil temperature is > 30°C).
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.
6.9 Filter dryer
Gaseous CO
has a significantly lower solubility in water than other refrigerants. At low temperatures
2
it can therefore cause blocking of valves and filters due to ice or hydrate. For this reason we recom-
mend the use of an adequately sized filter drier and a sight glass with a moisture indicator.
6.10 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.
refrigerant to leak.
D
GB
F
E
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