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8 | AQ450736920607en-000201
© Danfoss | Climate Solutions | 2023.07
3
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Areas of application
3.1 Refrigerants
• HFKW / HFC:
R134a, R404A/R507, R407C
• (H)FCKW / (H)CFC:
R22
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.
- Max. permissible discharge end temperature: 140°C
- Permissible ambient temperature: (-20°C) - (+100°C)
- Max. permissible switching frequency: 12 x /h
- A minimum running time of 2 min. at equilibrium (continuous
operation) must be achieved.
Avoid continuous operation near the threshold. Should the com-
pressor happen to be used near the thresholds, we recommend the
use of a thermal protection thermostat (Accessories, Chap. 7).
For operation with capacity regulator:
- Continuous operation, when the capacity regulator is activated,
is not permissible and can cause damage to the compressor.
- The suction gas superheat temperature may need to be reduced
or set individually when operating near to the threshold.
- When the capacity regulator is activated, the gas velocity in the
system can not under certain circumstances ensure that suffi
-
cient oil is transported back to the compressor.
When operating in the vacuum range, there is a danger of air en-
tering 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!
The compressors are factory-filled with the following oil type:
- for R134a, R404A/R507, R407C
BOCK
lub E55
- for R22
BOCK
lub
A46
Compressors with ester oil charge (
BOCK
lub E55
) are marked with an X in the type
designation (e.g. FK
X
40/655).
3.2 Oil charge
3.3 Limits of application
INFO
For recharging, we recommend the above oil types:
see chapter 6.6.
Maximum admissible
operating pressure (g)
(LP/HP)
1)
: 19/28 bar
1)
LP = Low pressure
HP = High pressure
