GEA Bock HG66e Series - 5 Areas of Application on HC and LG Compressors; Refrigerants; Oil Charge

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4 | Areas of application
Maximumadmissibleoperating
pressure(LP/HP)
1)
:19/28bar
Maximumadmissibleoperating
pressure(LP/HP)
1)
:19/28bar
Maximumadmissible
frequency:60Hz
Maximumadmissible
frequency:60Hz
1)
LP = Low pressure
HP = High pressure
1)
LP = Low pressure
HP = High pressure
5 | Areas of application at HC and LG compressors
5.3 Operatinglimits
ATTENTION Compressor operation is possible within the operating limits.
ThesecanbefoundinBockcompressorselectiontool (VAP)under
vap.bock.de. Observethe information giventhere andthefollo-
wingnotes:
-Minimumsuperheating∆t
Oh
=20K(onlyatHCcompressors)
Inordertoguaranteetherequiredminimumsuperheatingof∆t
Oh
=20K,aninternalheatexchangerIHXmayhavetobeinstalled.
(onlyatHCcompressors)
- Min.pressuregastemperature≥50°C(min.20Kovercondens-
ingtemperature). Suctiongassuperheatingoncompressorent-
ranceshouldbemin.7-10K,mustbeincreasedifnecessary
(onlyatLGcompressors)
-Min.oiltemperature≥ 30°C.
-Operationinthevacuumrangeisnotpermitted.
During operation in the vacuum range, there is a danger of air
entering on the suction side.This cancausechemical reactions,
pressureriseinthecondenserandanexcessivepressuregastem-
peratureaswellasshiftingoftherefrigerantignitionlimitintothe
criticalrange.Avoidabsolutelyanyentryofair!
Usealowpressureswitch!Selectashut-offpointmin.50Pahigher
thantheprevailingsurroundingpressure!
5.1 Refrigerants
• Hydrocarbons: R290,R1270(Recommendationquality2.5(<50ppmH
2
O))
• HFO refrigerants: R1234ze, R1234yf, R455A, R454C
5.2Oilcharge
The compressors are factory-charged with the following oil type:
• HC compressors: FUCHS Reniso Synth 68
• LG compressors: FUCHS Reniso Triton SE 55
FUCHS Reniso C 85 E (from t
O
> 15°C, must be specified in the order)