GEA Bock HG66e HC Series, Руководство по сборке

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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)