Areas Of Application On Hc And Lg Compressors; Refrigerants; Oil Charge - BOCK HG44e Assembly Instructions Manual

5 | Areas of application at HC and LG compressors

5.1 Refrigerants

• Hydrocarbons:
• HFO refrigerants:
5.2 Oil charge
The compressors are factory-charged with the following oil type:
• HC compressors:
• LG compressors:
5.3 Operating limits
ATTENTION Compressor operation is possible within the operating limits.
D
GB
F
E
Maximum permissible operating
pressure (LP/HP)
12
R290, R1270 (Recommendation quality 2.5 (< 50 ppm H
R1234ze, R1234yf, R455A, R454C
BOCK lub G68
BOCK lub E55
BOCK lub E85 (from t
These can be found in Bock compressor selection tool (VAP) under
vap.bock.de. Observe the information given there and the follo-
wing notes:
- The final compression temperature must be at least 20K above
the condensing temperature (dew point). If necessary, an inter-
nal heat exchanger IHX must be provided for this purpose.
- 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!
: 19/28 bar
1)
> 15°C, must be specified in the order)
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1) LP = Low pressure HP = High pressure
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2