2.0Installation
2.1Beforeyoustart
Theapplications(subtypes)intheA247applicationkeyarevery
flexibleandalmostidentical.However,someapplicationshave
extrafunctionswhicharedescribedseparately.
Thesearethebasicprinciples:
Heating(circuit1):
Typically,theflowtemperatureisadjustedaccordingtoyour
requirements.TheflowtemperaturesensorS3isthemost
importantsensor.ThedesiredflowtemperatureatS3iscalculated
intheECLcontroller,basedontheoutdoortemperatureS1andthe
desiredroomtemperature.Thelowertheoutdoortemperature,
thehigherthedesiredflowtemperature.
Bymeansofaweekschedule(upto3‘Comfort’periods/day),the
heatingcircuitcanbein‘Comfort’or‘Saving’mode(twodifferent
temperaturevaluesfordesiredroomtemperature).
InSavingmodetheheatingcanbereducedorswitchedofftotally.
ThemotorizedcontrolvalveM2isopenedgraduallywhenthe
flowtemperatureislowerthanthedesiredflowtemperatureand
viceversa.
Thereturntemperature(S5)tothedistrictheatingsupplyshould
notbetoohigh.Ifso,thedesiredflowtemperaturecanbeadjusted
(typicallytoalowervalue),thusresultinginagradualclosingofthe
motorizedcontrolvalve.
Inboiler-basedheatingsupplythereturntemperatureshouldnot
betoolow(sameadjustmentprocedureasabove).
Furthermore,thereturntemperaturelimitationcanbedependent
oftheoutdoortemperature.Typically,thelowertheoutdoor
temperature,thehighertheacceptedreturntemperature.
Ifthemeasuredroomtemperature(RemotecontrolunitECA30/
31)doesnotequalthedesiredroomtemperature,thedesiredflow
temperaturecanbeadjusted.
Thecirculationpump(P1)isONatheatdemandoratfrost
protection.
TheheatingcanbeswitchedOFFwhentheoutdoortemperatureis
higherthanaselectablevalue.
A247.1,A247.2:
Aconnectedfloworenergymeterbasedonpulses(S7)canlimit
thefloworenergytoasetmaximumvalue.Furthermore,the
limitationcanbeinrelationtotheoutdoortemperature.
Typically,thelowertheoutdoortemperature,thehigherthe
acceptedflow/power.
WhenthesubtypesA347.1-A347.3areused(onlyinECLComfort
310),theflow/powersignalcancomeasanM-bussignal.
Thefrostprotectionmodemaintainsaselectableflowtemperature,
forexample10°C.
Analarmcanbeactivatediftheactualflowtemperaturediffers
fromthedesiredflowtemperature.
TypicalA247.1application,examplea:
Theshowndiagramisafundamentalandsimplifiedexampleanddoes
notcontainallcomponentsthatarenecessaryinasystem.
AllnamedcomponentsareconnectedtotheECLComfortcontroller.
Listofcomponents:
ECL210/310
ElectroniccontrollerECLComfort210or310
S1
Outdoortemperaturesensor
S2
DHWreturntemperaturesensor,circuit2
S3
Flowtemperaturesensor,circuit1
S4
DHWflowtemperaturesensor,circuit2
S5
Returntemperaturesensor,circuit1
S6
DHWtanktemperaturesensor,upper
S7
Flow/energymeter(pulsesignal)
S8
DHWtanktemperaturesensor,lower
P1
Circulationpump,heating,circuit1
P2
Chargingpump,DHW,circuit2
P3
Circulationpump,DHW,circuit2
M1
Motorizedcontrolvalve(3-pointcontrolled),circuit2
Alternative:Thermoactuator(DanfosstypeABV)
M2
Motorizedcontrolvalve(3-pointcontrolled),circuit1
Alternative:Thermoactuator(DanfosstypeABV)
A1
Alarm
A/B
Internal/externalconnectionsforDHWcirculation
6|©Danfoss|2017.12
VI.LG.S6.02
OperatingGuideECLComfort210/296/310,applicationA247/A347