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3 | areas of application, R744 – GEA Bock HG4 CO2 User Manual

Page 8

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8

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96020-02.2015-DGbFEI

3| Areas of application

The compressors are filled at the factory with the following oil type:

GEA 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

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

= -5°C

R744

1

2

ATTENTION The correct oil level is shown

in figure 4.
Damage to the compressor
is possible if overfilled or
underfilled!

max.

min.

1,8 Ltr.

oil level

Fig. 4

~

~

ATTENTION Compressor operation is possible within the operating limits

shown in the diagrams. Please note the significance
of the shaded areas. Thresholds should not be selected as
design or continuous operation points.
- Permissible ambient temperature (-20°C) - (+60°C)
- 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.