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Commissioning
6.2 Pressure strength test
WARNING! The compressor must never be pressurised using oxygen or other
technical gases!
The maximum permissible overpressure of the compressor must not
be exceeded at any time during the testing process (see name plate
data)!
6.1 Preparations for start-up
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.
The pressure strength test is best carried out using dry nitrogen (N
2
).
Do not mix any refrigerant with the testing medium (N
2
) as this could cause the ignition limit to
shift into the critical range.
6.3 Leak test
Carry out the leak test of the refrigerating system in accordance with EN 378-2 or a corresponding
safety standard
without including the compressor
.
Do not mix any refrigerant with the testing medium, as this could cause the ignition limit to shift into
the critical range.
6.4 Evacuation
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.
ATTENTION! Do not start the compressor if it is under vacuum. Do not apply
any voltage - even for test purposes (must only be operated with
refrigerant).
Under vacuum, the spark-over and creepage current distances of the
terminal board connection bolts shorten; this can result in winding and
terminal board damage.
INFO!
In order to protect the compressor against inadmissible operating
conditions, high-pressure and low-pressure pressostats controls are
mandatory on the installation side.
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!
