GEA Bock HGZ7 Series User Manual

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7| Commissioning
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
CAUTION Wear personal protective clothing such as goggles and protective
gloves!
ATTENTION Avoidoverllingthesystemwithrefrigerant!
To avoid shifts in concentration, zeotropic refrigerant blends must
alwaysonlybelledintotherefrigeratingplantinliquidform.
Donotpourliquidcoolantthroughthesuctionlinevalveon
the compressor.
It is not permissible to mix additives with the oil and
refrigerant.
7.6 Start-up
WARNING Ensure that both shut-off valves are open before starting the
compressor!
ATTENTION Iflargerquantitiesofoilhavetobetoppedup,thereisariskof
oil hammer effects.
If this is the case check the oil return!
 Checkthatthesafetyandprotectiondevices(pressureswitch,motorprotection,electricalcontact
protectionmeasures,etc.)areallfunctioningproperly.
Switch on the compressor and allow to run for a minimum of 10 min.
Check the oil level by:Theoilmustbevisibleinthesightglass.

GEA Bock HGZ7 Series Specifications

General

Brand	GEA Bock
Model	HGZ7 Series
Category	Air Compressor
Language	English