GEA Bock F18 - Manual (Page 16)

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5| Commissioning
5.2 Pressure strength test
5.1 Preparations for start-up
5.3 Leak test
5.4 Evacuation
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 To protect the compressor against inadmissible operating conditions,
high pressure and low pressure pressostats are mandatory on the
installation side.
DANGER Risk of 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.
DANGER Risk of bursting!
Do not mix any refrigerant with the nitrogen (N
2
) as this could cau-
se the ignition limit to shift into the critical range.
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.
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.
Carry out the leak test of the refrigerating system in accordance with EN 378-2 or a corresponding
safety standard without including the compressor.
ATTENTION If the capacity regulator is mounted at the factory, the control com-
ponent (pilot valve) is mounted and connected subsequently by the
customer. If the control component is not connected, the cylinder bank
is switched off permanently. Damage to the compressor is possible!
See chapter 7.