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8 | AQ453354265896en-000201
© Danfoss | Climate Solutions | 2023.07
3
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Areas of application
The compressors are factory-filled with the following oil type:
- for R134a, R404A/R507, R407C, R513A
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
50/775 N).
3.1 Refrigerants
• HFKW / HFC:
R134a, R404A/R507, R407C, R513A
• HFCKW / HCFC:
R22
3.2 Oil charge
3.3 Limits of application
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.
See Chapter 7.1.
- 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!
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
