GEA pluscom Bock EX-HG12P, Руководство по сборке, Страница: 14 / 44

14
D
GB
F
E
I
09691-08.2019-DGbFEIRu
3 | Areas of application
3.4 Limits of application
ATTENTION Compressor operation is possible within the operating limits.
These can be found in GEA Bock compressor selection tool (VAP)
under vap.gea.com. Observe the information given there.
- Max. permissible discharge end temperature 140 °C.
- Max. permissible switching frequency 8 x / h.
- A minimum running time of 3 min. steady-state condition
(continuous operation) must be achieved.
Suction gas overheating
∆ t
oh
:
The correct setting of the suction gas overheating temperature
∆ t
oh
at the compressor entrance is of decisive importance:
Too low
∆ t
oh
=> danger of liquid operation
Too high
∆ t
oh
=> danger of compressor overheating
∆
t
oh
min = 7 - 10 K, individual adjustment required.
Permissible ambient temperature range −20 °C to +60 °C.
Avoid continuous operation near the limits.
For operation with frequency converter:
- the maximum current and power consumption may not
be exceeded. During operation above the mains frequency
the application limit can be restricted.
Variable frequency range: 30 - 70 Hz
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!