GEA HG34P Series - Refrigerant Charge; Start-Up

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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 charge
6.6 Start-up
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 coolant whatsoever while the compressor is at a
standstill.