GEA HGX4 CO2 Series - 3 Areas of Application; Refrigerants; Oil Charge; Limits of Application

8
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GB
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96020-09.2013-DGbFEI
3| Areas of application
ATTENTION! Compressor operation is possible within the operating limits
shown in the diagrams. Please note the signicance
of the shaded areas. Thresholds should not be selected as design
or continuous operation points.
- Max. permissible discharge end temperature 140 °C
    -Max.permissibleswitchingfrequency12x/h.
- A minimum running time of 3 min. steady-state condition
(continuous operation) must be achieved.
Foroperationwithfrequencyconverter:
- The maximum current and power consumption must not be
exceeded.Inthecaseofoperationabovethemainsfrequency,
the application limit can therefore be limited.
 Thecompressorsarelledatthefactorywiththefollowingoiltype:
BockC85E(onlythisoilmaybeused)
3.1 Refrigerants
• CO
2
: R744
3.2 Oil charge
3.3 Limits of application
Evaporation temperature (°C)
Condensing temperature (°C)
Suction gas superheat (K)
Fig. 5
R744
1
2
Max. permissible operating
pressure (LP/HP)
1)
: 27/55 bar
1)
LP = Low pressure
HP = High pressure
Unlimited
application range
1
HGX4/385-4 CO
2
Maximum condensing
temperature t
c
= 0°C
2
HGX4/555-4 CO
2
Maximum condensing
temperature t
c
= -7,5°C
The oil level must be in the visible
part of the sight glass; damage
to the compressor is possible if
overfilled or underfilled!
ATTENTION!
Fig. 4
max. oil level
min. oil level