GEA Bock HGX46 CO2 T - Manual (Page 28)

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6| Commissioning
6.2 Pressure strength test
6.1 Preparations for start-up
Carry out the leak test of the refrigerating system in accordance with EN 378-2 or a corresponding
safety standard without including the compressor.
The compressor has undergone trials in the factory and all functions have been tested. There are
therefore no special running-in instructions.
Check the compressor for transport damage!
INFO In order to protect the compressor against inadmissible opera-
ting conditions, high-pressure and low-pressure pressostats
controls are mandatory on the installation side.
WARNING When the compressor is not running, depending on ambient
temperature and amount of refrigerant charge, it is possible
that the pressure may rise and exceed permitted levels for the
compressor. Adequate precautions must be taken to prevent this
happening (e.g. using a cold storage medium, a receiver tank, a
secondary refrigerant system, or pressure relief devices).
DANGER Bursting!
The compressor must only be pressurised using nitrogen (N
2
).
Never pressurise with oxygen or other gases!
The maximum permissible overpressure of the compressor must
not be exceeded at any time during the testing process (see
name plate data)! Do not mix any refrigerant with the nitrogen as
this could cause the ignition limit to shift into the critical range.
The compressor has been factory-tested for pressure resistance. The following must be observed if
the entire plant is subjected to an additional pressure strength test:
Test the refrigeration circuit according to EN 378-2 or a corresponding safety standard.
6.3 Leak test
DANGER Bursting! Do not mix any refrigerant with the nitrogen (N
2
) as this
could cause the ignition limit to shift into the critical range.