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AQ453249013813en-000201| 19

7| Accessories

7.1 Capacity regulation

Foradescription,seetechnicalinformation"Capacityregulation"(ItemNo.09900)

Ifthecapacityregulatorisfactory-tted,itisintegratedintoanextra,dedicatedcylindercover.For

retrots,itissuppliedwiththecylindercover.Theregulatorclosesonecylinderbank(capacityregula-

tionapprox.50%).

FK40 / ... ... N + TK ... K

Designation Ref. No.* Ref. No.*

Special accessory 12 V 097B08703 097B08708

Special accessory 24 V 097B08704 097B08709

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sufcient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).

* Please note that the legacy BOCK ref. numbers are without 097B

Danfoss BOCK FK40 User Manual

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