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5 | commissioning – GEA Bock FK20 User Manual

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5| Commissioning

5.7 Avoiding liquid shocks

ATTENTION! Slugging can damage the compressor and cause refrigerant to

leak.

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.