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18 | AQ450736920607en-000201
© Danfoss | Climate Solutions | 2023.07
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Accessories
7.1 Capacity regulation
For a description, see technical information "Capacity regulation" (Item No. 097B09900*)
If the capacity regulator is factory-fitted, it is integrated into an extra, dedicated cylinder cover. For
retrofits, it is supplied with the cylinder cover. The regulator closes one cylinder bank (capacity regula
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tion approx. 50%).
FK40 / ...
... K
Designation
Art.-Nr.
Capacity regulator 12 V
097B40510*
Capacity regulator 24 V
097B40511*
ATTENTION
Capacity-regulated operation alters the gas speeds and pressure
ratios of the refrigerating plant: Adjust the suction line routing and
dimensioning accordingly, do not set the control intervals too close and
do not let the system switch more than 12 times per hour (refriger-
ating plant must have reached a state of equilibrium). Continuous
operation in the control stage is not recommended as the gas
velocity in the plant system under certain circumstances does not
guarantee sufficient oil return to the compressor with activated
capacity regulator for a compressor speed below 1200 - 1500 rpm.
We recommend switching to unregulated operation (100% capacity)
for at least 5 minutes per capacity-regulated operating hour. An
assured oil return can also be realised by a 100% capacity require-
ment after each compressor restart as otherwise the compressor
can also be shut down in the regulated operating time by the
thermostat.
Electrical actuation of the solenoid valve: Normally open, (cor-
responds to 100 % compressor capacity).
Cylinder covers for capacity regulation are marked with the
designation "CR" (Capacity Regulator).
6.7 Decommissioning
Close the shut-off valve on the compressor. Drain the refrigerant (it must not be discharged directly
into the environment) and dispose of it according to the regulations. When the compressor is depres
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surised, undo the fastening screws of the shut-off valves. Remove the compressor using an appropri-
ate hoist. Dispose of the oil inside in accordance with the valid national regulations.
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Maintenance
* Please note that the legacy BOCK code numbers are without 097B
