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3| Areas of application
3.1
Refrigerants
HFC + blends
HFC/HFO blends
More informations about approved refrigerants on Bock compressor selection tool VAP (vap.bock.de).
3.2
Oil charge
The compressors are filled at the factory with the following oil type: BOCK lub E55
US
3.3
Limits of application
Maximum admissible frequency: 60 Hz
Maximum admissible operating pressure (LP/HP)
19/28 barg (276/406 psig)
8
R134a, R404A/R507
R448A, R449A, R450A, R513A
For refilling, we recommend the above oil types.
See also section 7.4.
The oil level must be in the
visible part of the sight glass;
damage to the compressor is
possible if overfilled or under-
filled!
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.
- Permissible ambient temperature: -20°C...+60°C (-4°F...140°F)
- Max. permissible discharge end temperature 140°C (284°F).
- Max. permissible switching frequency 12x /h.
- A minimum running time of 3 min. steady-state condition
(continuous operation) must be achieved.
For operation with supplementary cooling:
- Use only oils with high thermal stability.
- Avoid continuous operation near the threshold.
- The suction gas superheat temperature may need to be reduced
or set individually when operating near to the threshold.
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 (max. 60 Hz)
When operating in the vacuum range, there is a danger of air
entering on the suction side. This can cause chemical reactions,
a pressure rise in the condenser and an elevated compressed-gas
temperature. Prevent the ingress of air at all costs!
Max.
Oil level
Min.
(max. 60 Hz).
:
1)
LP = Low pressure
1)
HP = High pressure
~
1.9 ltr
~
67 fl.oz
Fig. 3
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