GEA HGX4 R134a User Manual

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GB
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6| Commissioning
6.1 Preparations for start-up
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!
6.2 Pressure strength test
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.
Carry out the leak test of the refrigerating system in accordance with EN 378-2 or a corresponding
safety standard without including the compressor.

GEA HGX4 R134a Specifications

General

Brand	GEA
Model	HGX4 R134a
Category	Air Compressor
Language	English