BOCK FK40 Series - Preventing Liquid Shocks

16
09716-01.2021-DGbFEPtITrRu
D
GB
F
E
PT
I
TR
Ru
5| 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avoidliquidshocks,thefollowingpointsshouldbeobserved:
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.