GEA HG44e/475-4 - Page 31

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Specialaccessoriesareonlypremountedinthefactoryiforderedspeciallybycustomer.Retrottingis
possibleinfullcompliancewiththesafetyinstructionsandrepairinstructionsenclosedwiththekits.
Informationabouttheuse,operation,maintenanceandservicingofthecomponentsisavailableinthe
printedliteratureorontheinternetunderwww.gea.com.
8| Accessories
ATTENTION Capacity-regulated operation alters the gas speeds and pressure
ratios of the refrigerating plant: Adjust the suction line routing and
dimensioning accordingly, do not set the control intervals too
close and do not let the system switch more than 12 times per
hour(refrigeratingplantmusthavereachedastateofequilibrium).
Continuous operation in the control stage is not recommended as
the gas velocity in the plant system under certain circumstances
doesnotguaranteesufcientoilreturntothecompressorwith
activated capacity regulator.
We recommend switching to unregulated operation (100% capac-
ity) for at least 5 minutes per capacity-regulated operating hour.
An assured oil return can also be realised by a 100% capacity
requirementaftereachcompressorrestart.
Electrical actuation of the solenoid valve: Normally open, (cor-
responds to 100 % compressor capacity).
WARNING Several capacity regulators cannot switch at the same time during
compressor operation! Otherwise the sudden change in load can
damage the compressor! Comply with the switching interval of 60 s.
• Complywiththeswitchingsequence:
Swichingon LR1 60s LR2
Swichingoff LR2 60s LR1
Fig.26
Forthecapacityregulatorastepprotectionis
optionalavailable,Art-Nr.81449.