User Manual

24
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GB
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Ru
09911-01.2015-DGbFEIRu
6| Commissioning
CAUTION! Wear personal protective clothing such as goggles and protective
gloves!
Make sure that the suction and pressure line shut-off valves are open.
 Withthecompressorswitchedoff,addtheliquidrefrigerantdirectlytothecondenserorreceiver,
breaking the vacuum.
If the refrigerant needs topping up after starting the compressor, it can be topped up in vapour
formonthesuctionside,or,takingsuitableprecautions,alsoinliquidformattheinlettothe
evaporator.
INFO!
Avoidoverllingthesystemwithrefrigerant!
In order to prevent shifts in concentration, zeotropic refrigerant
blends(e.g.R407C)mustalwaysonlybeaddedtotherefrigerating
systeminliquidform.
Do not pour liquid refrigerant through the suction line shut-off
valveonthecompressor.
Itisnotpermissibletomixadditiveswiththeoilandrefrigerant.
6.5 Refrigerantlling
6.6 Commissioning
  WARNING! Ensure that both shut-off valves are open before starting the
compressor!
Check that the safety and protection devices (pressure switch, motor protection, electrical con-
tact protection measures, etc.) are functioning properly.
Switch on the compressor and let it run for at least 10 minutes.
Check the oil level : The oil must be visible in the sight glass.
 ATTENTION!Iflargerquantitiesofoilhavetobetoppedup,thereisariskofoil
impacteffects.Ifthisisthecase,checktheoilreturn!
6.7 Avoid slugging
ATTENTION!Slugging can result in damage to the compressor and cause
  refrigeranttoleak.
Topreventslugging:
The complete refrigeration plant 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 superheating 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.
 Particularlyincriticalsystems(e.g.severalevaporatorpoints),measuressuchastheuseofliquid
traps,solenoidvalveintheliquidline,etc.arerecommended.
Thereshouldbenomovementofrefrigerantinthecompressorwhilethesystemisata
standstill.