GEA HGX7 R134a - Refrigerant Charge; Start-Up

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INFO! Avoidoverllingthesystemwithrefrigerant!
Donotpourliquidrefrigerantthroughthesuctionlineshut-offval-
ve on the compressor.
It is not permissible to mix additives with the oil and refrigerant.
6| Commissioning
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.
CAUTION! Wear personal protective clothing such as goggles and protective
gloves!
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 refrigerant in the compressor while the system is at a
standstill.