GEA Bock HG44e Series - Commissioning; Preparations for start-up; Pressure integrity test; Leak test

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8 | Commissioning
8.1 Preparations for start-up
8.4 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.
ForHCandLGcompressorssuitableequipmentapprovedforammablerefrigerants
mustbeused.
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!
8.3 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.
8.2 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.