Danfoss AKA 245 Specifications download pdf (Page 5)

AK-CC 550 Manual RS8EN502 © Danfoss 02-2010 5

Thermostat bands

Thermostatbandscanbeusedbeneciallyforapplianceswhere

dierentproducttypesarestoredwhichrequiredierenttem-

peratureconditions.Itispossibletochangebetweenthetwo

dierentthermostatbandsviaacontactsignalonadigitalinput.

Separate thermostat and alarm limits can be set for each thermo-

stat band – also for the product sensor.

Night setback of thermostat value

Inrefrigerationappliancestheremaybebigloaddierences

betweentheshop’sopeningandclosinghours,especiallyifnight

lids/blindsareused.Thethermostatreferencemayberaisedhere

withoutithavinganyeectontheproducttemperature.

Change-overbetweendayandnightoperationcantakeplace,as

follows:

•viaanexternalswitchsignal.

•viaasignalfromthedatacommunicationsystem.

Product sensor

AseparateoptionalproductsensorS6,whichmaybeplaced

in the appliance, can also be used and which can register and

monitor the temperature in the warmest part of the appliance.

There are separate alarm limits and time delays for the product

sensor.

Appliance cleaning

Thisfunctionmakesiteasyfortheshop’sstatocarryouta

cleaning of the appliance according to a standard procedure.

Appliancecleaningisactivatedviaasignal–asaruleviaakey

switch placed on the appliance.

Appliancecleaningiscarriedoutviathreephases:

1-attherstactivationtherefrigerationisstopped,butthefans

keeponoperatinginordertodefrosttheevaporators.”Fan”is

shown on the display.

2-atthesecondactivationthefansarealsostoppedandthe

appliancecannowbecleaned.”OFF”isshownonthedisplay.

3-Atthethirdactivationrefrigerationisrecommenced.The

displaywillshowtheactualappliancetemperature,(o97

setting).

Whenappliancecleaningisactivatedacleaningalarmistrans-

mitted to the normal alarm recipient. A later processing of these

alarms will document that the appliance has been cleaned as

often as planned.

Alarm monitoring

There are no temperature alarms during appliance cleaning.

- + + °C

1 ÷ + Fan

2 ÷ ÷ O

3 + + °C

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Danfoss AKA 245 Specifications Page 5

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