GEA Bock HGZ Series - Refrigerant Charge; Start-Up

D
GB
F
E
29
09726-09.2013-DGbF
7| Commissioning
CAUTION! Wear personal protective clothing such as goggles and
protective gloves!
Makesurethatthesuctionandpressurelineshut-offvalvesareopen.
 Withthecompressorswitchedoff,addtheliquidrefrigerantdirectlytothecondenserorreceiver,
breakingthevacuum.
Payattentiontoadequaterefrigerantllbeforestartingupthecompressor.
Duringoperation,refrigerantmustbefreeofbubblesinsightglasses1and2oftheliquid
subcooler.
 Iftherefrigerantneedstoppingupafterstartingthecompressor,itcanbetoppedupinvapour
formonthesuctionside,or,takingsuitableprecautions,alsoinliquidformattheinlettothe
evaporator.
7.5 Refrigerant charge
7.6 Start-up
WARNING! Ensure that both shut-off valves are open before starting the
compressor!
 Checkthatthesafetyandprotectiondevices(pressureswitch,motorprotection,electricalcon-
tactprotectionmeasures,etc.)arefunctioningproperly.
 Switchonthecompressorandletitrunforatleast10minutes.
 Checktheoil level:Theoilmustbevisibleinthesightglass.
ATTENTION!Iflargerquantitiesofoilhavetobetoppedup,thereisariskofoil
impacteffects.Ifthisisthecase,checktheoilreturn!
INFO! Avoidoverllingthesystemwithrefrigerant!
In orderto preventshifts in concentration,zeotropic refrigerant
blends (e.g. R407C) must always only be added to the refrigerating
systeminliquidform.
Donotpourliquidrefrigerantthroughthesuctionlineshut-offval-
ve on the compressor.
It is not permissible to mix additives with the oil and refrigerant.