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Commissioning
The compressor shaft is sealed to outside using a shaft seal. The sealing element rotates with the
shaft.
The following is especially important to ensuring fault-free operation:
The complete refrigerant circuit must be correctly executed and clean inside.
Heavy shocks and vibrations to the shaft as well as continuous cyclic operation are to be
avoided.
The sealing surfaces can stick together during prolonged downtimes (e.g. winter). Therefore, run
the system every 4 weeks for 10 minutes.
5.8 Avoiding liquid shocks
To prevent liquid shocks:
The complete refrigeration plant must be correctly designed and executed.
The capacities of all components must be compatible (particularly evaporator and expansion
valve).
Suction gas superheating at the evaporator output should be at least 7 – 10 K (check setting
of the expansion valve).
The system must reach a state of equilibrium.
Particularly in critical systems (e.g. several evaporator points), suitable measures, e.g.
use of liquid traps, solenoid valve in the liquid line, etc. are recommended.
ATTENTION
Slugging can damage the compressor and cause refrigerant to leak.
