Danfoss AKA 245 Especificaciones descargar pdf (Pagina 15)

AK-CC 550 Manual RS8EN502 © Danfoss 02-2010 15

Survey of functions

Function Para-

meter

Parameter by operation via data

communication

Normal display

NormallythetemperaturevaluefromoneofthetwothermostatsensorsS3orS4ora

mixture of the two measurements is displayed.

Ino17theratioisdetermined.

Displayair(u56)

Thermostat Thermostat control

Set point

Regulationisbasedonthesetvalueplusadisplacement,ifapplicable.Thevalueisset

viaapushonthecentrebutton.

Thesetvaluecanbelockedorlimitedtoarangewiththesettingsinr02andr03.

Thereferenceatanytimecanbeseenin"u91Cutouttemp".

Cutout °C

Diﬀerential

Whenthetemperatureishigherthanthereference+thesetdierential,thecom-

pressorrelaywillbecutin.Itwillcutoutagainwhenthetemperaturecomesdownto

the set reference.

r01 Dierential

Setpoint limitation

Thecontroller’ssettingrangeforthesetpointmaybenarroweddown,sothatmuch

toohighormuchtoolowvaluesarenotsetaccidentally-withresultingdamages.

Toavoidatoohighsettingofthesetpoint,themax.allowablereferencevaluemaybe

lowered.

r02 Max cutout °C

Toavoidatoolowsettingofthesetpoint,themin.allowablereferencevaluemaybe

increased.

r03 Min cutout °C

Correction of the display’s temperature

Ifthetemperatureattheproductsandthetemperaturereceivedbythecontrollerare

notidentical,anosetadjustmentofthedisplaytemperaturecanbecarriedout.

r04 Disp.Adj.K

Temperature unit

Sethereifthecontrolleristoshowtemperaturevaluesin°Corin°F.

r05 Temp. unit

°C=0./°F=1

(Only°ConAKM,whatevertheset-

ting)

Correction of signal from S4

Compensation possibility due to long sensor cable

r09 AdjustS4

Correction of signal from S3

Compensation possibility due to long sensor cable

r10 AdjustS3

Start / stop of refrigeration

Withthissettingrefrigerationcanbestarted,stoppedoramanualoverrideofthe

outputscanbeallowed.(Formanualcontrolthevalueissetat-1.ThentheAKVoutlet

andtherelayoutletscanbeforce-controlledbytherespectivereadingparameters

(u23,u58,etc.).Herethereadvaluecanbeoverwritten.)

Start/stopofrefrigerationcanalsobeaccomplishedwiththeexternalswitchfunc-

tionconnectedtoaDIinput.

Stoppedrefrigerationwillgivea”Standbyalarm”.

r12 Main Switch

1: Start

0: Stop

-1: Manual control of outputs allowed

Night setback value

Thethermostat’sreferencewillbethesetpointplusthisvaluewhenthecontroller

changesovertonightoperation.(Selectanegativevalueifthereistobecoldac-

cumulation.)

r13 Nightoset

Thermostat function

Hereitisdenedhowthethermostatistooperate.EitherasanordinaryON/OFFther-

mostat or as a modulating thermostat.

1:ON/OFFthermostat

2: Modulating

Whenoperationis”modulating”theAKVvalvewilllimittheowofrefrigerantsothat

thetemperaturevariationwillbelessthanfortheON/OFFthermostat.

Thedierential(r01)mustnotbesetlowerthan2Kfor"modulating".

InadecentralisedplantyoumustselecttheON/OFFthermostatsetting.

r14 Therm. mode

Selection of thermostat sensor

Hereyoudenethesensorthethermostatistouseforitscontrolfunction.S3,S4,ora

combinationofthem.Withthesetting0%,onlyS3isused(Sin).With100%,onlyS4.

r15 Ther.S4%

Melt function

Onlyforcontrolofrefrigeration(-5to+10°C).Thefunctionensuresthattheevapora-

torwillnotbeblockedbyfrost.Hereyousethowoftenthefunctionistostopthe

refrigerationandhencetransformthefrosttowater(oriceifthereistoomuchfrost).

r16 MeltInterval

Melt period

Hereyousethowlonganon-goingmeltfunctionistolast.

r17 Melt period

Ref. Dif.

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 35 36

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