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96019-05.2012-DGbFEI
6
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Commissioning
Make sure that the suction and pressure line shut-off valves are open.
INFO!
Depending upon design of the CO
2
refrigerant filling bottle
(with/without tubing) CO
2
can be filled in liquid after weight or
gaseously.
Use only high-dried CO
2
quality!
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
Filling the liquid refrigerant: It is recommend that the system first be filled
at standstill with gas on the high-pressure side up to a system pressure of at
least 5.2 bar (if it is filled below 5.2 bar with liquid, there is a risk of dry ice
formation. Further filling by system.
To eliminate the possibility of dry ice formation when the system is operating
(during and after the filling process), the shut-off point of the low-pressure
switch should be set to a value of at least 5.2 bar.
•
One after start-up necessarily becoming refrigerant addition can be filled
gaseously into the suction face.
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!
Max. permissible pressure at filling under any circumstances do
not exceed. In time suitable measures meet (e.g. Printing retaining
refrigerant plant or high pressure stage of the cascade operate).
