Danfoss AK-CC 550 - Communication and Output Connections; Installation Considerations

AK-CC550 Manual RS8EN502 © Danfoss 02-2010 33
Coordinateddefrostvia
data communication
Coordinateddefrostvia
cable connections
The following controllers can be connected
up in this way:
EKC204A,AK-CC210,AK-CC250,
AK-CC450,AK-CC550,
Refrigeration is resumed when all
controllershave“released”thesignalfor
defrost.
The setting of controllers to coordinate
theirdefrostingtakesplaceinthe
gateway/systemmanager.
Refrigeration is resumed when all
controllershave“released”thesignalfor
defrost.
DO1
ConnectionofexpansionvalvetypeAKVorAKVA.Thecoilmust
be a 230 V a.c. coil.
DO2
Alarm
Thereisaconnectionbetweenterminal7and8inalarm
situations and when the controller is without power.
Rail heat and heating element in drip tray
Thereisconnectionbetweenterminal7and9whenheating
takesplace.
Night blind
Thereisconnectionbetweenterminal7and9whenthenight
blind is up.
Suction line valve
Thereisconnectionbetweenterminal7and9whenthe
suction line must be open.
DO3
Refrigeration, Rail heat, Heat function, Defrost 2
There is connection between terminal 10 and 11 when the
functionmustbeactive.
Heating element in drip tray
There is connection between terminal 10 and 11 when heating
takesplace.
DO4
Defrost
Thereisconnectionbetweenterminal12and14when
defrostingtakesplace.
Hotgas/drainvalve
Thereisconnectionbetweenterminal13and14duringnormal
operation.
Thereisconnectionbetweenterminal12and14whenthehot
gasvalvesmustopen.
DO5
Fan
Thereisconnectionbetweenterminal15and16whenthefan
is on.
DO6
Light relay
Thereisconnectionbetweenterminal17and18whenthe
light must be on.
Rail heat, Compressor 2
Thereisconnectionbetweenterminal17and19whenthe
functionmustbeactive.
DI3
Digital input signal.
Thesignalmusthaveavoltageof0/230VAC.
Thefunctionisdenedino84.
Data communication
Ifdatacommunicationisused,itisimportantthattheinstallation
of the data communication cable is performed correctly.
See separate literature No. RC8AC…
Electric noise
Cablesforsensors,DIinputsanddatacommunicationmust be
keptseparatefromotherelectriccables:
-Useseparatecabletrays
- Keep a distance between cables of at least 10 cm
-LongcablesattheDIinputshouldbeavoided
Installation considerations
Accidentaldamage,poorinstallation,orsiteconditions,cangive
rise to malfunctions of the control system, and ultimately lead to a
plantbreakdown.
Everypossiblesafeguardisincorporatedintoourproductsto
preventthis.However,awronginstallation,forexample,couldstill
present problems. Electronic controls are no substitute for normal,
good engineering practice.
Danfoss will not be responsible for any goods, or plant compo-
nents,damagedasaresultoftheabovedefects.Itistheinstaller's
responsibilitytochecktheinstallationthoroughly,andtotthe
necessarysafetydevices.
Special reference is made to the necessity of signals to the
controller when the compressor is stopped and to the need of
liquidreceiversbeforethecompressors.
YourlocalDanfossagentwillbepleasedtoassistwithfurther
advice,etc.
Max. 10