Manual

D
GB
F
E
19
09917-02.2015-DGbFEI
6| Commissioning
Make sure that the suction and pressure line shut-off valves are open.
Fillingtheliquidrefrigerant:Itisrecommendedthatthesystemrstbelled
at standstill with gas on the high-pressure side up to a system pressure of at
least5.2bar(ifitislledbelow5.2barwithliquid,thereisariskofdryice
formation).Furtherllingaccordingtosystem.
To eliminate the possibility of dry ice formation when the system is operating
(duringand after thellingprocess),the shut-off point of the low-pressure
switch should be set to a value of at least 5.2 bar.
•Arefrigerantsupplement,whichmaybecomenecessaryafterstart-up,canbe
topped up in vapour form on the suction side.
INFO! Depending upon design of the CO
2
refrigerantllingbottle 
    (with/withouttubing)CO
2
canbelledinliquidafterweightor 
gaseously.
Use only high-dried CO
2
quality!
ATTENTION!
Avoid overfilling the machine with refrigerant!
Donotchargeliquidrefrigerantintothesuction-sideonthe 
compressor.
Do not mix additives with the oil and refrigerant.
WARNING! Never exceed the max. permissible pressures while charging.
Precautionsmustbetakenintime(eg.operatingauxiliaryconden-
sing unit for standstill pressure control or high pressure stage of
the cascade).
First evacuate the system and then include the compressor in the evacuation process.
Relieve the compressor pressure.
Open the suction and pressure line shut-off valves.
Evacuate the suction and discharge pressure sides using the vacuum pump.
At the end of the evacuation process, the vacuum should be < 1.5 mbar when the pump is switched off.
 Repeatthisprocessasoftenasisrequired.
CAUTION! Wear personal protective clothing such as goggles and protective
gloves!
6.5 Refrigerant charge