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2.0Installation
2.1Beforeyoustart
TheECLapplicationkeyP348containsonesubtype,P348.1.
Thisapplicationforheatingtemperaturecontrolandadvanced
DHWtemperaturecontrolisveryflexible.
Theheatingcircuit:
P348.1,ex.ashowstworadiatorcircuitsinparallel,eachcircuit
withitsownreturntemperaturesensorformonitoringpurpose.
P348.1,ex.bshowsoneradiatorcircuitwithitsownreturn
temperaturesensorformonitoringpurpose.
P348.1,ex.cshowstworadiatorcircuitsinparallel,eachcircuit
withitsownreturntemperaturesensorformonitoringpurpose.
P348.1,ex.dshowsoneradiatorcircuitwithitsownreturn
temperaturesensorformonitoringpurpose.
Temperaturecontrolofheatingcircuit:
Theflowtemperatureisadjustedaccordingtoyourrequirements.
TheflowtemperaturesensorS3isthemostimportantsensorand
mustbeconnected.DesiredflowtemperatureatS3iscalculated
intheECLcontroller,basedontheoutdoortemperatureS1and
thedesiredroomtemperature.
Ingeneral,thelowertheoutdoortemperature,thehigherthe
desiredflowtemperature.
Bymeansofaweekschedule,theheatingcircuitcanbein‘Comfort’
or‘Saving’mode(twovaluesforthedesiredroomtemperature).In
Savingmodetheheatingcanbereducedorswitchedofftotally.
ThemotorizedcontrolvalveM2isopenedgraduallywhenthe
flowtemperatureislowerthanthedesiredflowtemperatureand
viceversa.
ThereturntemperatureS5canbelimited,forexamplenottobe
toohigh.Ifso,thedesiredflowtemperatureatS3canbeadjusted
(typicallytoalowervalue),whichresultsinagradualclosingof
themotorizedcontrolvalve.Furthermore,thereturntemperature
limitationcanbedependentontheoutdoortemperature.
Typically,thelowertheoutdoortemperature,thehigherthe
acceptedreturntemperature.
Inboiler-basedheatingsupplythereturntemperatureshouldnot
betoolow(sameadjustmentprocedureasabove).
Ifthemeasuredroomtemperature(viaECA30/31)doesnotequal
thedesiredroomtemperature,thedesiredflowtemperaturecan
beadjusted.
Thecirculationpump,P2,isONatheatdemandoratfrost
protection.
TheheatingcanbeswitchedOFFwhentheoutdoortemperatureis
higherthanaselectablevalue.
ReturntemperaturesensorsS11andS12areusedformonitoring
purposeonly.
PressuresensorsS15andS16areusedformonitoringpurpose.
Furthermore,analarmcanbeactivatedifthepressuregetshigher
thanasetvalueorlowerthananothersetvalue.
P348.1,ex.a,heating(circuitsAandB)andDHWtemperaturecontrol.
PumpsinDHWcircuitcanbe0–10Voltcontrolled.
Theshowndiagramisafundamentalandsimplifiedexampleanddoes
notcontainallcomponentsthatarenecessaryinasystem.
AllnamedcomponentsareconnectedtotheECLComfortcontroller.
Listofcomponents:
ECL310
ECLComfort310controller
ECA32
Built-inextensionmodule,0-10Voutputsfor
pumpspeedcontrol
S1
Outdoortemperaturesensor
S2
Supplytemperaturesensor
S3
(mandatory)Flowtemperaturesensor,circuit1
S4
(mandatory)DHWflowtemperaturesensor,
circuit2
S5
Returntemperaturesensor,circuit1
S6
(mandatory)Upperbuffertemperaturesensor
S7
Bufferflowtemperaturesensor
S8
Lowerbuffertemperaturesensor
S9
DHWcirculationreturntemperaturesensor
S10
Bufferreturntemperaturesensor
S11
Returntemperaturesensor,circuit1A
S12
Returntemperaturesensor,circuit1B
S15
Supplyreturnpressuresensor
S16
Supplyflowpressuresensor
F1
Flowmeter(signaltype:Pulse)
P1
DHWbufferchargingpump(ON-OFFcontrolled)
V1
SpeedcontrolofDHWbufferchargingpump(0-
10V)
P2
Circulationpump(ON-OFFcontrolled),circuit1
P3
DHWcirculationpump(ON-OFFcontrolled)
V3
SpeedcontrolofDHWcirculationpump(0-10V)
M1
Motorizedcontrolvalve(ON-OFFcontrolled)
M2
Motorizedcontrolvalve(3-pointcontrolled)
A1
Alarm
6|©Danfoss|2017.04
VI.LV.G2.02
OperatingGuideECLComfort310,applicationP348