GEA Bock HGZ7 Series User Manual

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7| Commissioning
ATTENTION ToavoidliquidshocksontheHPstage,theexpansionvalvemay
only be opened approx. 15-20 seconds after the compressor is
switched on (full load operation).
At compressor shut-down:
Close the solenoid valve approx. 15 - 20 seconds before the com-
pressor is switched off.
7.7 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. 7 - 10 K.(checkthesetting
oftheexpansionvalve).
 Thesystemmustreachastateofequilibrium.
When selecting the evaporator expansion valve, pay attention to correction factors for liquid
subcooling. Avoid transfer of refrigerant into the compressor when the system is at a
standstill.
Theuseofaliquidseparatorisrecommended.
ATTENTION Slugging can damage the compressor and cause refrigerant to
leak.

GEA Bock HGZ7 Series Specifications

General

Brand	GEA Bock
Model	HGZ7 Series
Category	Air Compressor
Language	English