Instruction Manual

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GB
F
E
I
Ru
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09637-11.2014-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 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.