GEA HG44e/475-4 - 6 Commissioning; Preparations For Start-Up; Pressure Integrity Test; Leak Test

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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.
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!
6.3 Leak test
CarryouttheleaktestontherefrigeratingplantinaccordancewithEN378-2oracorresponding
safetystandard,whilealwaysobservingthemaximumpermissibleoverpressureforthecompressor.
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.
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.
6.2 Pressure integrity test
Thecompressorhasbeentestedinthefactoryforpressureintegrity.Ifhowevertheentiresystemis
tobesubjectedtoapressureintegritytest,thisshouldbecarriedoutinaccordancewithEN378-2
oracorrespondingsafetystandardwithout the inclusion of the compressor.