Emerson IC200CX EVO - Auxiliary Heat Source Function

IC200CXEVO
usermanual
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11.5Auxiliaryheatsourcefunction
Thecontrollermanagesanexternalsourcethatcanbeusedasasupplementorbackuptotheheat
pumpwhentheoutsideairtemperatureisparticularlyharsh.
Thesupplement/backupmodedependsontheselectionofparameterAr11.Todeactivatethe
function,setparameterAr11=0(levelPr2).
Theexternalsourceisswitchedoff:
• withaflowswitchalarmactive;
• withevaporatorpumpoverloadprotectionalarmactive;inthiscase,theboilerheatersare
activatedonlybytheantifreezesetpointforexchangerprotection.
Supplementfunction
Toactivatethefunction,setparameterAr11=1.
Duringoperation,whentheairtemperaturemeasuredbytheoutsideairprobefallsbelowthe
outsidesetpointvalueAr12,countingofthedelaytimeAr14begins.If,duringcountingoftimeAr14,
theoutsideairtemperaturerisesabovethevaluesetinparameterAr12+differentialAr13,the
functioniscancelledandtimeAr14isreloaded.
Diagramofconsenttoactivationoftheauxiliarysourceand
thecompressorsbasedontheoutsideairtemperature.
If,aftertimeAr14,theoutsideairtemperatureremainsbelowsetpointAr12andthewater
temperaturemeasuredbythethermoregulationprobeislowerthansetpointvalueAr17,theheat
sourceisenabled.
Withsupplementfunctionenabled(outsideairtemperaturebelowvalueAr12),iftheoutsideair
temperaturefallsbelowsetpointAr19,thecompressorsareswitchedoff.Thecompressorsare
switchedonagainiftheoutsideairtemperaturereturnsabovesetpointAr19+controlbandAr20.
WhensetpointAr17+controlbandAr18isreached,theexternalsourceisswitchedoff.