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96182-09.2013-DGbFEI

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.

GEA HGX7 R134a User Manual

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