User Manual

D
GB
F
E
19
96031-02.2015-DGbF
6| Commissioning
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.
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).
CAUTION! Wear personal protective clothing such as goggles and protective
gloves!
6.5 Refrigerant charge