Danfoss A275, A375 Operating guide
OperatingGuide
ECLComfort210/296/310,applicationA275/A375
1.0TableofContents
1.0TableofContents...............................................1
1.1Importantsafetyandproductinformation.....................2
2.0Installation........................................................7
2.1Beforeyoustart.....................................................7
2.2Identifyingthesystemtype......................................29
2.3Mounting...........................................................45
2.4Placingthetemperaturesensors................................48
2.5Electricalconnections.............................................50
2.6InsertingtheECLApplicationKey..............................59
2.7Checklist............................................................66
2.8Navigation,ECLApplicationKeyA275.........................67
3.0Dailyuse.........................................................79
3.1Howtonavigate...................................................79
3.2Understandingthecontrollerdisplay..........................80
3.3Ageneraloverview:Whatdothesymbolsmean?...........84
3.4Monitoringtemperaturesandsystem
components........................................................85
3.5Influenceoverview................................................87
3.6Manualcontrol.....................................................88
3.7Schedule............................................................89
4.0Settingsoverview............................................90
5.0Settings...........................................................93
5.1IntroductiontoSettings..........................................93
5.2Flow(boiler)temperature........................................94
5.3Tanktemperature..................................................98
5.4Roomlimit........................................................101
5.5Returnlimit.......................................................103
5.6Optimization......................................................108
5.7Boiler...............................................................114
5.8Controlparameters..............................................122
5.9Application.......................................................127
5.10Alarm..............................................................135
5.11Alarmoverview..................................................142
5.12Anti-bacteria......................................................143
6.0Commoncontrollersettings............................145
6.1Introductionto‘Commoncontrollersettings’..............145
6.2Time&Date.......................................................146
6.3Holiday............................................................147
6.4Inputoverview...................................................149
6.5Log.................................................................150
6.6Outputoverride..................................................151
6.7Keyfunctions.....................................................152
6.8System.............................................................154
7.0Miscellaneous................................................161
7.1ECA30/31setupprocedures.................................161
7.2Overridefunction................................................169
7.3Severalcontrollersinthesamesystem......................172
7.4Frequentlyaskedquestions....................................175
7.5Definitions........................................................179
7.6Type(ID6001),overview.......................................183
7.7Automatic/manualupdateoffirmware.....................184
7.8ParameterIDoverview..........................................185
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OperatingGuideECLComfort210/296/310,applicationA275/A375
1.1Importantsafetyandproductinformation
1.1.1Importantsafetyandproductinformation
ThisOperatingGuideisassociatedwithECLApplicationKeyA275
(ordercodeno.087H3814).
TheECLapplicationkeyA275containstwosetsofapplications:
•A275(subtypesA275.1,A275.2,A275.3)
•A375(subtypesA375.1,A375.2,A375.3,A375.4,A375.5).A375
subtypesonlyruninECL310.
SubtypesA275.1,A275.2andA275.3arefor1-burnersolutions.
SubtypesA375.1,A375.2andA375.3areformultipleburner
solutions.
SubtypesA375.4andA375.5arefor1-burnersolutions,inclusive
0-10Voltcontrolofburnertemperature.
Thefunctionscanberealizedin:
•ECLComfort210(A275)forsimplesolutionsor
•ECLComfort296(A275)forsimplesolutions,buthaving
advancedcommunication,suchasM-bus,Modbusand
Ethernet(Internet)communicationor
•ECLComfort310(A275/A375)foradvancedsolutions,e.g.
M-bus,ModbusandEthernet(Internet)communication.
FloworpowerlimitationviaM-busisnotusedinA275/A375.
TheapplicationA275complieswithECLComfortcontroller210
and310asofsoftwareversion1.11(visibleatstart-upofthe
controllerandin‘Commoncontrollersettings’in‘System’).
TheApplicationKeyA275alsocomplieswithECLComfort296
controllersasoffirmwareversion1.58.
UptotwoRemoteControlUnits,ECA30orECA31,canbe
connectedforremotemonitoringandsetting.Thebuilt-inroom
temperaturesensorcanbeutilized.
ECLPortal,Internetbasedconnection,allowsECL296,310and
310Btobemonitoredandcontrolledremotelyviastandard
Internetbrowsers(forexampleInternetExplorer,GoogleChrome
andSafari).
SeetheInstallationGuide(deliveredwiththeapplicationkey)for
applicationexamplesandelectricalconnections.
AdditionaldocumentationforECLComfort210,296and310and
accessoriesareavailableonhttps://store.danfoss.com.
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OperatingGuideECLComfort210/296/310,applicationA275/A375
TogetherwiththeECLComfort310,theadditionalInternalI/O
moduleECA32(ordercodeno.087H3202)canbeusedforextra
datacommunicationtoSCADA:
•Temperature,Pt1000(default)
•0-10voltsignals
•Digitalinput
Theset-upofinputtypecanbedonebymeansoftheDanfoss
Software"ECLTool".
Navigation:Danfoss.com>Serviceandsupport>Downloads>
Tools>Heating>ECLTool.
TheURLis:
https://www.danfoss.com/en/service-and-support/downloads/
TheInternalI/OmoduleECA32isplacedinthebasepartforECL
Comfort310.
ECLComfort210isavailableas:
•ECLComfort210,230volta.c.(087H3020)
•ECLComfort210B,230volta.c.(087H3030)
ECLComfort296isavailableas:
•ECLComfort296,230volta.c.(087H3000)
ECLComfort310isavailableas:
•ECLComfort310,230volta.c.(087H3040)
•ECLComfort310B,230volta.c.(087H3050)
•ECLComfort310,24volta.c.(087H3044)
TheB-typeshavenodisplayanddial.TheB-typesareoperatedby
meansoftheRemoteControlunitECA30/31:
•ECA30(087H3200)
•ECA31(087H3201)
BasepartsforECLComfort:
•forECLComfort210,230volt(087H3220)
•forECLComfort296,230volt(087H3240)
•forECLComfort310,230voltand24volt(087H3230)
AdditionaldocumentationforECLComfort210,296and310,
modulesandaccessoriesisavailableonhttp://heating.danfoss.com/
orhttp://store.danfoss.com.
DocumentationforECLPortal:Seehttp://ecl.portal.danfoss.com.
A275/A375navigationingeneral:
A275.1/A375.1/A375.4A275.2/A375.2A275.3/A375.3/A375.5
CircuitCircuitCircuit
11
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1
23
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OperatingGuideECLComfort210/296/310,applicationA275/A375
Burnercontroloverview:
R2–R10=relaynos.inECL/ECA32
Seethesection‘Electricalconnections’formoredetailedinformation.
Applicationkeysmightbereleasedbeforealldisplaytextsare
translated.InthiscasethetextisinEnglish.
Automaticupdateofcontrollersoftware(firmware):
Thesoftwareofthecontrollerisupdatedautomaticallywhenthekey
isinserted(asofcontrollerversion1.11(ECL210/310)andversion
1.58(ECL296)).Thefollowinganimationwillbeshownwhenthe
softwareisbeingupdated:
Progressbar
Duringupdate:
•DonotremovetheKEY
Ifthekeyisremovedbeforethehour-glassisshown,youhave
tostartafresh.
•Donotdisconnectthepower
Ifthepowerisinterruptedwhenthehour-glassisshown,the
controllerwillnotwork.
•Manualupdateofcontrollersoftware(firmware):
Seethesection"Automatic/manualupdateoffirmware"
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OperatingGuideECLComfort210/296/310,applicationA275/A375
SafetyNote
Toavoidinjuryofpersonsanddamagestothedevice,itisabsolutely
necessarytoreadandobservetheseinstructionscarefully.
Necessaryassembly,start-up,andmaintenanceworkmustbe
performedbyqualifiedandauthorizedpersonnelonly.
Locallegislationsmustberespected.Thiscomprisesalsocable
dimensionsandtypeofisolation(doubleisolatedat230V).
AfusefortheECLComfortinstallationismax.10Atypically.
TheambienttemperaturerangesforECLComfortinoperationare:
ECLComfort210/310:0-55°C
ECLComfort296:0-45°C.
Exceedingthetemperaturerangecanresultinmalfunctions.
Installationmustbeavoidedifthereisariskforcondensation(dew).
Thewarningsignisusedtoemphasizespecialconditionsthatshould
betakenintoconsideration.
Thissymbolindicatesthatthisparticularpieceofinformationshould
bereadwithspecialattention.
AsthisOperatingGuidecoversseveralsystemtypes,specialsystem
settingswillbemarkedwithasystemtype.Allsystemtypesareshown
inthechapter:'Identifyingyoursystemtype'.
°C(degreesCelsius)isameasuredtemperaturevaluewhereasK
(Kelvin)oftenisusedfortemperaturedifferences.
TheIDno.isuniquefortheselectedparameter.
ExampleFirstdigitSeconddigitLastthreedigits
1117411174
-
Circuit1Parameterno.
12174
IfanIDdescriptionismentionedmorethanonce,itmeansthatthere
arespecialsettingsforoneormoresystemtypes.Itwillbemarked
withthesystemtypeinquestion(e.g.12174-A266.9).
1
-
2
Circuit2Parameterno.
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OperatingGuideECLComfort210/296/310,applicationA275/A375
ParametersindicatedwithanIDno.like"1x607"meanauniversal
parameter.
xstandsforcircuit/parametergroup.
DisposalNote
Thissymbolontheproductindicatesthatitmaynot
bedisposedofashouseholdwaste.
Itmustbehandedovertotheapplicabletake-back
schemefortherecyclingofelectricalandelectronic
equipment.
•Disposeoftheproductthroughchannelsprovided
forthispurpose.
•Complywithalllocalandcurrentlyapplicablelaws
andregulations.
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OperatingGuideECLComfort210/296/310,applicationA275/A375
2.0Installation
2.1Beforeyoustart
TheapplicationA275.1isveryflexible.Thesearethebasic
principles:
Heating(circuit1):
Typically,theboilertemperatureisadjustedaccordingtoyour
requirements.TheboilertemperaturesensorS3isthemost
importantsensor.Itmustbeplacedcorrectlyinordertomeasure
theboilertemperature.ThedesiredboilertemperatureatS3is
calculatedintheECLcontroller,basedontheoutdoortemperature
(S1)andthedesiredroomtemperature.Thelowertheoutdoor
temperature,thehigherthedesiredboilertemperature.Theboiler
temperatureisalsotheflowtemperatureinthedirectconnected
heatingcircuit.
Bymeansofaweekschedule(upto3‘Comfort’periods/day),the
heatingcircuitcanbein‘Comfort’or‘Saving’mode(twodifferent
temperaturevaluesforthedesiredroomtemperature).In'Saving'
modea'Totalstop'functioncanbeselectedinordertoswitchOFF
theheating.
TheburnerisswitchedONwhentheboilertemperatureis
lowerthanthedesiredboilertemperatureandswitchedOFF
whentheboilertemperatureishigherthanthedesiredboiler
temperature.AswitchingdifferencedeterminestheON/OFF
control.Furthermore,theboilerprotectionfunctionwillonly
switchONthecirculationpumpiftheboilertemperaturegets
aboveaminimumtemperature.AminimumON-timecanbesetfor
theburnerinordertoincreasetheboiler'sefficiency.
Thereturntemperature(S5)totheboilershouldnotbetoo
high(condensingboiler)ortoolow(oilorgasfiredboiler).Ifso,
thedesiredboilertemperaturecanbedecreasedorincreased.
Furthermore,thereturntemperaturelimitationcanbedependent
ontheoutdoortemperature.Typically,thelowertheoutdoor
temperature,thehighertheacceptedreturntemperature.
Ifthemeasuredroomtemperature(measuredbyS7ortheremote
controlunitECA30)doesnotequalthedesiredroomtemperature,
thedesiredboilertemperaturecanbeadjusted.
TypicalA275.1application:
*Pressurereliefvalve
Theshowndiagramisafundamentalandsimplifiedexampleanddoes
notcontainallcomponentsthatarenecessaryinasystem.
AllnamedcomponentsareconnectedtotheECLComfortcontroller.
Listofcomponents:
S1
Outdoortemperaturesensor
S3
(mandatory)Boilertemperaturesensor
S5Returntemperaturesensor
S7
Roomtemperaturesensor/ECA30
P1
Circulationpump
B1Burner
A1
Alarm
Thecirculationpump(P1)isONatheatdemandoratfrost
protection.
TheheatingcanbeswitchedOFFiftheoutdoortemperaturegets
higherthanasetvalue.
AQ042286456873en-010501
Thecontrollerispre-programmedwithfactorysettingsthatareshown
intherelevantchaptersofthisguide.
©Danfoss|2021.04|7
OperatingGuideECLComfort210/296/310,applicationA275/A375
TheapplicationA275.2isveryflexible.Thesearethebasic
principles:
Heating(circuit1):
Typically,theboilertemperatureisadjustedaccordingtoyour
requirements.TheboilertemperaturesensorS3isthemost
importantsensor.Itmustbeplacedcorrectlyinordertomeasure
theboilertemperature.ThedesiredboilertemperatureatS3is
calculatedintheECLcontroller,basedontheoutdoortemperature
(S1)andthedesiredroomtemperature.Thelowertheoutdoor
temperature,thehigherthedesiredboilertemperature.Theboiler
temperatureisalsotheflowtemperatureinthedirectconnected
heatingcircuit.
Bymeansofaweekschedule(upto3‘Comfort’periods/day),the
heatingcircuitcanbein‘Comfort’or‘Saving’mode(twodifferent
temperaturevaluesforthedesiredroomtemperature).In'Saving'
modea'Totalstop'functioncanbeselectedinordertoswitchOFF
theheating.
TheburnerisswitchedONwhentheboilertemperatureis
lowerthanthedesiredboilertemperatureandswitchedOFF
whentheboilertemperatureishigherthanthedesiredboiler
temperature.AswitchingdifferencedeterminestheON/OFF
control.Furthermore,theboilerprotectionfunctionwillonly
switchONthecirculationpumpiftheboilertemperaturegets
aboveaminimumtemperature.AminimumON-timecanbesetfor
theburnerinordertoincreasetheboiler'sefficiency.
Thereturntemperature(S5)totheboilershouldnotbetoo
high(condensingboiler)ortoolow(oilorgasfiredboiler).Ifso,
thedesiredboilertemperaturecanbedecreasedorincreased.
Furthermore,thereturntemperaturelimitationcanbedependent
ontheoutdoortemperature.Typically,thelowertheoutdoor
temperature,thehighertheacceptedreturntemperature.
Ifthemeasuredroomtemperature(measuredbyS7ortheremote
controlunitECA30)doesnotequalthedesiredroomtemperature,
thedesiredboilertemperaturecanbeadjusted.
Thecirculationpump(P1)isONatheatdemandoratfrost
protection.
TheheatingcanbeswitchedOFFiftheoutdoortemperaturegets
higherthanasetvalue.
TypicalA275.2application:
*Pressurereliefvalve
Theshowndiagramisafundamentalandsimplifiedexampleanddoes
notcontainallcomponentsthatarenecessaryinasystem.
AllnamedcomponentsareconnectedtotheECLComfortcontroller.
Listofcomponents:
S1
Outdoortemperaturesensor
S3
(mandatory)Boilertemperaturesensor
S5Returntemperaturesensor
S6
DHWtanktemperaturesensor
S7
Roomtemperaturesensor/ECA30
P1
Circulationpump,heating
B1Burner
P3
DHWheatingpump
A1
Alarm
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Thecontrollerispre-programmedwithfactorysettingsthatareshown
intherelevantchaptersofthisguide.
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OperatingGuideECLComfort210/296/310,applicationA275/A375
A275.2,basicprinciples,continued:
DHW(circuit2):
Bymeansofaweekschedule(upto3‘Comfort’periods/day),the
DHWcircuitcanbein‘Comfort’or‘Saving’mode(twodifferent
temperaturevaluesfordesiredDHWtemperature).
IfthemeasuredDHWtemperature(S6)islowerthanthedesired
DHWtemperature,theDHWheatingprocedurestarts:
•ThecirculationpumpP1intheheatingcircuitisswitchedOFF
•TheDHWheatingpumpP3isswitchedON
•ThedesiredboilertemperatureatS3isincreased.
Thedesiredboilertemperatureistypically10-15degreeshigher
thanthedesiredDHWtemperature.
WhenthemeasuredDHWtemperature(S6)getshigherthanthe
desiredDHWtemperature,theDHWheatingpump(P3)isswitched
OFF.StartandstopdifferencesdeterminetheON/OFFcontrol.A
post-runtimecanbeset.
Ananti-bacteriafunctionisavailableforactivationontheselected
daysoftheweek.
TheDHWheatinghaspriority,i.e.pumpP3isONandpumpP1is
OFF.Iftheapplicationhasachangeovervalve(priorityvalve)for
theDHWheating,thecirculationpumpP1isstillONduringDHW
heating.
TypicalA275.2application:
*Pressurereliefvalve
Theshowndiagramisafundamentalandsimplifiedexampleanddoes
notcontainallcomponentsthatarenecessaryinasystem.
AllnamedcomponentsareconnectedtotheECLComfortcontroller.
Listofcomponents:
S1
Outdoortemperaturesensor
S3
(mandatory)Boilertemperaturesensor
S5Returntemperaturesensor
S6
DHWtanktemperaturesensor
S7
Roomtemperaturesensor/ECA30
P1
Circulationpump,heating
B1Burner
P3
DHWheatingpump
A1
Alarm
Thecontrollerispre-programmedwithfactorysettingsthatareshown
intherelevantchaptersofthisguide.
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OperatingGuideECLComfort210/296/310,applicationA275/A375
TheapplicationA275.3isveryflexible.Thesearethebasic
principles:
Heating(circuit1):
Typically,theboilertemperatureisadjustedaccordingtoyour
requirements.TheboilertemperaturesensorS3isthemost
importantsensor.Itmustbeplacedcorrectlyinordertomeasure
theboilertemperature.ThedesiredboilertemperatureatS3is
calculatedintheECLcontroller,basedontheoutdoortemperature
(S1)andthedesiredroomtemperature.Thelowertheoutdoor
temperature,thehigherthedesiredboilertemperature.Theboiler
temperatureisalsotheflowtemperatureinthedirectconnected
heatingcircuit.
Bymeansofaweekschedule(upto3‘Comfort’periods/day),the
heatingcircuitcanbein‘Comfort’or‘Saving’mode(twodifferent
temperaturevaluesforthedesiredroomtemperature).In'Saving'
modea'Totalstop'functioncanbeselectedinordertoswitchOFF
theheating.
TheburnerisswitchedONwhentheboilertemperatureis
lowerthanthedesiredboilertemperatureandswitchedOFF
whentheboilertemperatureishigherthanthedesiredboiler
temperature.AswitchingdifferencedeterminestheON/OFF
control.Furthermore,theboilerprotectionfunctionwillonly
switchONthecirculationpumpiftheboilertemperaturegets
aboveaminimumtemperature.AminimumON-timecanbesetfor
theburnerinordertoincreasetheboiler'sefficiency.
Thereturntemperature(S5)totheboilershouldnotbetoo
high(condensingboiler)ortoolow(oilorgasfiredboiler).Ifso,
thedesiredboilertemperaturecanbedecreasedorincreased.
Furthermore,thereturntemperaturelimitationcanbedependent
ontheoutdoortemperature.Typically,thelowertheoutdoor
temperature,thehighertheacceptedreturntemperature.
Ifthemeasuredroomtemperature(measuredbyS7ortheremote
controlunitECA30)doesnotequalthedesiredroomtemperature,
thedesiredboilertemperaturecanbeadjusted.
Thecirculationpump(P1)isONatheatdemandoratfrost
protection.
TheheatingcanbeswitchedOFFiftheoutdoortemperaturegets
higherthanasetvalue.
TypicalA275.3application:
*Pressurereliefvalve
Theshowndiagramisafundamentalandsimplifiedexampleanddoes
notcontainallcomponentsthatarenecessaryinasystem.
AllnamedcomponentsareconnectedtotheECLComfortcontroller.
Listofcomponents:
S1
Outdoortemperaturesensor
S2Returntemperaturesensor,circuit2
S3
(mandatory)Boilertemperaturesensor,circuit1
S4
Flowtemperaturesensor,circuit2
S5Returntemperaturesensor,circuit1
S6
DHWtanktemperaturesensor
S7
Roomtemperaturesensor/ECA30,circuit1
S8
Roomtemperaturesensor/ECA30,circuit2
M2
Motorizedcontrolvalve,circuit2
P1
Circulationpump,circuit1
B1Burner
P3
DHWheatingpump,circuit3
P4
Circulationpump,circuit2
10|©Danfoss|2021.04
Thecontrollerispre-programmedwithfactorysettingsthatareshown
intherelevantchaptersofthisguide.
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OperatingGuideECLComfort210/296/310,applicationA275/A375
A275.3,basicprinciples,continued:
Heating(circuit2):
Typically,theflowtemperatureisadjustedaccordingtoyour
requirements.TheflowtemperaturesensorS4isthemost
importantsensor.ThedesiredflowtemperatureatS4iscalculated
intheECLcontroller,basedontheoutdoortemperature(S1)and
thedesiredroomtemperature.Thelowertheoutdoortemperature,
thehigherthedesiredflowtemperature.
Bymeansofaweekschedule(upto3‘Comfort’periods/day),the
heatingcircuitcanbein‘Comfort’or‘Saving’mode(twodifferent
temperaturevaluesforthedesiredroomtemperature).In'Saving'
modea'Totalstop'functioncanbeselectedinordertoswitchOFF
theheating.
ThemotorizedcontrolvalveM2isopenedgraduallywhentheflow
temperature,S4,islowerthanthedesiredflowtemperatureand
viceversa.
ThedesiredflowtemperatureatS4willtypicallydeterminethe
desiredboilertemperature(S3).
Thereturntemperature(S2)canbelimited.Ifso,thedesiredflow
temperatureatS4canbedecreasedorincreased.
Furthermore,thereturntemperaturelimitationcanbedependent
ontheoutdoortemperature.Typically,thelowertheoutdoor
temperature,thehighertheacceptedreturntemperature.
TypicalA275.3application:
*Pressurereliefvalve
Theshowndiagramisafundamentalandsimplifiedexampleanddoes
notcontainallcomponentsthatarenecessaryinasystem.
AllnamedcomponentsareconnectedtotheECLComfortcontroller.
Ifthemeasuredroomtemperature(measuredbyS8ortheremote
controlunitECA30)doesnotequalthedesiredroomtemperature,
thedesiredflowtemperaturecanbeadjusted.
Thecirculationpump(P4)isONatheatdemandoratfrost
protection.
TheheatingcanbeswitchedOFFwhentheoutdoortemperatureis
higherthanaselectablevalueoraDHWheatingpriorityispresent.
Listofcomponents:
S1
Outdoortemperaturesensor
S2Returntemperaturesensor,circuit2
S3
(mandatory)Boilertemperaturesensor,circuit1
S4
Flowtemperaturesensor,circuit2
S5Returntemperaturesensor,circuit1
S6
DHWtanktemperaturesensor
S7
Roomtemperaturesensor/ECA30,circuit1
S8
Roomtemperaturesensor/ECA30,circuit2
M2
Motorizedcontrolvalve,circuit2
P1
Circulationpump,circuit1
B1Burner
P3
DHWheatingpump,circuit3
P4
Circulationpump,circuit2
Thecontrollerispre-programmedwithfactorysettingsthatareshown
intherelevantchaptersofthisguide.
AQ042286456873en-010501
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OperatingGuideECLComfort210/296/310,applicationA275/A375
A275.3,basicprinciples,continued:
DHW(circuit3):
Bymeansofaweekschedule(upto3‘Comfort’periods/day),the
DHWcircuitcanbein‘Comfort’or‘Saving’mode(twodifferent
temperaturevaluesfordesiredDHWtemperature).
IfthemeasuredDHWtemperature(S6)islowerthanthedesired
DHWtemperature,theDHWheatingprocedurestarts:
•ThecirculationpumpP1intheheatingcircuitisswitchedOFF
•TheDHWheatingpumpP3isswitchedON
•ThedesiredboilertemperatureatS3isincreased.
Thedesiredboilertemperatureistypically10-15degreeshigher
thanthedesiredDHWtemperature.
WhenthemeasuredDHWtemperature(S6)getshigherthanthe
desiredDHWtemperature,theDHWheatingpump(P3)isswitched
OFF.StartandstopdifferencesdeterminetheON/OFFcontrol.A
post-runtimecanbeset.
Ananti-bacteriafunctionisavailableforactivationontheselected
daysoftheweek.
TheDHWheatinghaspriority,i.e.pumpP3isONandpumpP1is
OFF.Iftheapplicationhasachangeovervalve(priorityvalve)for
theDHWheating,thecirculationpumpP1isstillONduringDHW
heating.
TypicalA275.3application:
*Pressurereliefvalve
Theshowndiagramisafundamentalandsimplifiedexampleanddoes
notcontainallcomponentsthatarenecessaryinasystem.
AllnamedcomponentsareconnectedtotheECLComfortcontroller.
Listofcomponents:
S1
Outdoortemperaturesensor
S2Returntemperaturesensor,circuit2
S3
(mandatory)Boilertemperaturesensor,circuit1
S4
Flowtemperaturesensor,circuit2
S5Returntemperaturesensor,circuit1
S6
DHWtanktemperaturesensor
S7
Roomtemperaturesensor/ECA30,circuit1
S8
Roomtemperaturesensor/ECA30,circuit2
M2
Motorizedcontrolvalve,circuit2
P1
Circulationpump,circuit1
B1Burner
P3
DHWheatingpump,circuit3
P4
Circulationpump,circuit2
Thecontrollerispre-programmedwithfactorysettingsthatareshown
intherelevantchaptersofthisguide.
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OperatingGuideECLComfort210/296/310,applicationA275/A375
ApplicationA275ingeneral:
UptotwoRemoteControlUnits,ECA30/31,canbeconnectedto
oneECLcontrollertocontroltheECLcontrollerremotely.
Exerciseofcirculationpumpsandcontrolvalveinperiodswithout
heatingdemandcanbearranged.
AdditionalECLComfortcontrollerscanbeconnectedviatheECL
485bustoutilizecommonoutdoortemperaturesignal,timeand
datesignals.
SeveralECLcontrollers,internallyconnectedviaECL485bus,work
inMaster/Slaveconnection.InaMaster/Slavesystemmaximum
2ECA30/31canbepresent.
Unusedinput(fromS7andup)can,bymeansofanoverride
switch,beusedtooverridethescheduletoafixed'Comfort'or
'Saving'mode.
Modbuscommunication(ECL296andECL310)toaSCADAsystem
canbeestablished.
ECLPortal,Internetbasedconnection,allowsECL296,310and
310Btobemonitoredandcontrolledremotelyviastandard
Internetbrowsers(forexampleInternetExplorer,GoogleChrome
andSafari).
Heat-meters:
Upto5heat-meterscanbeconnectedtotheM-busterminals(ECL
296/310).
DatacanbetransferredtotheSCADAsystemviaModbusandTCP/
IPtotheECLPortal.
ModbuscommunicationtoaSCADAsystemcanbeestablished.
TheM-busdata(ECLComfort296/310)canfurthermorebe
transferredtotheModbuscommunication.
Alarm,A275.1andA275.2:
AlarmA1(relayR4)andthealarmsymbol(
•ifatemperaturesensororitsconnectiondisconnects/
shortcircuits.
Alarm,A275.3:
Thealarmsymbol(
•iftheactualflowtemperatureatS4(heatingcircuit2),differs
fromthedesiredflowtemperature.
•ifatemperaturesensororitsconnectiondisconnects/
short-circuits.
)canbeactivated:
)canbeactivated:
AQ042286456873en-010501
©Danfoss|2021.04|13
OperatingGuideECLComfort210/296/310,applicationA275/A375
ApplicationA275ingeneral,continued:
Offsetadjustment
Ameasuredtemperaturecanbeoffsetadjusted,ifneeded.
(Navigation:MENU>Commoncontroller>System>Sensoroffset)
Inputconfiguration
Inputs(asfromS7andup),whicharenotpartoftheapplication
canbeconfiguredtobePt1000,0-10Volt,frequency(pulse
counter)ordigitalinput.ThisfeaturemakesitpossibleinECL296/
310tocommunicateextrasignals,suchastemperatures,pressures,
ON/OFFconditions,viaModbusandECLPortal.
TheconfigurationisdonebymeansoftheECLTool(freesoftware
fordownload)ordirectlyinadedicatedmenuintheECLPortalor
theconnectionforModbus(BMS/SCADA).
Applicationupload
Theapplicationuploadprocedureisthefollowingafterhaving
powereduptheECLComfortcontroller:
1.Inserttheapplicationkey
2.Selectlanguage,*1,*2
3.Selectsubtype(theInstallationGuideshowssubtypes)
4.SetTimeandDate
TheECLComfortcontrollerinstallstheapplication,initializesand
restarts.Outputrelaysareactivated/de-activated(click-sounds
fromthiscanbeheard).Thisalsomeansthat,forexample,
circulationpumpscanbeswitchedONandOFFshortly.
*1:Seealsosection"InsertingtheECLApplicationKey" .
*2:(ECLComfort310,24Volt)Iflanguagecannotbeselected,the
powersupplyisnota.c.(alternatingcurrent).
Commissioning
WhentheselectedapplicationhasbeenuploadedtheECLComfort
controllerstartsinManualmode.Thiscanbeusedtoverifycorrect
connectionsof,forexample,temperature,pressureandflow
sensors.Alsoverifyingthecontrolledcomponents(valveactuators,
pumps,burneretc.)forcorrectfunctionalitycanbedone.
Theapplicationkeyisdeliveredwithfactorysettings.
Dependingonsystemtype,itmightbenecessarytochangesome
factorysettingsindividuallyforoptimizingthefunctionality.
Theapplicationkeymustbeinsertedforchangingsettings.
Power-down/power-up
WhenthepowersupplytotheECLComfortcontrolleris
disconnected(power-down),theoutputrelaysgotode-activated
position.
Thismeansthat,forexample,circulationpumpsandburnercanbe
switchedON.
SeetheelectricalconnectiondiagramsintheInstallationGuide.
Allrelaycontactsareshowninde-activatedsituation.Somerelay
contactsareclosed,somerelaycontactsareopen.
WhenthepowersupplytotheECLComfortcontrolleris
re-established(power-up),theoutputrelaysareactivated/
de-activated(click-soundsfromthiscanbeheard).Thisalsomeans
that,forexample,circulationpumpsandburnercanbeswitched
ONandOFFshortly.
ImportantforA275.3:
•Setthecorrectrunningtime"Mrun"oftheMotorizedControl
ValveM2.(Circuit2>MENU>Settings>Controlparameters
>Mrun).
14|©Danfoss|2021.04
AQ042286456873en-010501
OperatingGuideECLComfort210/296/310,applicationA275/A375
Thecontrollerispre-programmedwithfactorysettingsthatareshown
inthe‘ParameterIDoverview’appendix.
AQ042286456873en-010501
©Danfoss|2021.04|15
OperatingGuideECLComfort210/296/310,applicationA275/A375
TheapplicationA375.1isveryflexible.Thesearethebasic
principles:
TheapplicationsA375.1/A375.2/A375.3canON/OFFcontrolup
to8burnersteps.
InapplicationA375.1thefirst4burnerstepsarecontrolledby
relaysintheECL310.Thenext,max.4burnersteps,arecontrolled
byrelaysintheextensionmoduleECA32(placedinthebasepart
oftheECL310).
Heating(circuit1):
Typically,thecommonboilertemperatureisadjustedaccordingto
yourrequirements.TheboilertemperaturesensorS3isthemost
importantsensor.Itmustbeplacedcorrectlyinordertomeasure
thecommonboilertemperature.Thedesiredboilertemperature
atS3iscalculatedintheECLcontroller,basedontheoutdoor
temperature(S1)andthedesiredroomtemperature.Thelowerthe
outdoortemperature,thehigherthedesiredboilertemperature.
Theboilertemperatureisalsotheflowtemperatureinthedirect
connectedheatingcircuit.
Bymeansofaweekschedule(upto3‘Comfort’periods/day),the
heatingcircuitcanbein‘Comfort’or‘Saving’mode(twodifferent
temperaturevaluesforthedesiredroomtemperature).In'Saving'
modea'Totalstop'functioncanbeselectedinordertoswitchOFF
theheating.
ThefirstburnerstepisswitchedONwhenthecommonboiler
temperatureislowerthanthedesiredboilertemperature.The
controllerobservesthecommonboilertemperatureandswitches
ONthenextburnerstepifthecommonboilertemperaturedoes
notincreasesatisfactorily.TheswitchingOFFprocedureofburner
stepsisviceversa.AswitchingdifferencedeterminestheON/OFF
control.
Theburnerscanbecontrolledin:
•fixedsequence(example:Always1-2-3-4-5)or
•automaticrotatingsequence(example:Firstperiod:1-2-3-4-5,
secondperiod:2-3-4-5-1,thirdperiod:3-4-5-1-2andsoon)
•semi-automaticrotatingsequence(example:Firstperiod:1,
2-3-4-5,secondperiod:1,3-4-5-2,thirdperiod:1,4-5-2-3and
soon)
Furthermore,theboilerprotectionfunctionwillswitchONthe
circulationpumpwhentheboilertemperaturegetsabovea
minimumvalue.AminimumON-timecanbesetfortheburnerin
ordertoincreasetheboiler'sefficiency.
Thereturntemperature(S5)totheboilershouldnotbetoo
high(condensingboiler)ortoolow(oilorgasfiredboiler).Ifso,
thedesiredboilertemperaturecanbedecreasedorincreased.
Furthermore,thereturntemperaturelimitationcanbedependent
ontheoutdoortemperature.Typically,thelowertheoutdoor
temperature,thehighertheacceptedreturntemperature.
TypicalA375.1application:
*Pressurereliefvalve
Theshowndiagramisafundamentalandsimplifiedexampleanddoes
notcontainallcomponentsthatarenecessaryinasystem.
AllnamedcomponentsareconnectedtotheECLComfortcontroller.
Listofcomponents:
ECL310
ECA32
S1
S3
ElectroniccontrollerECLComfort310
Internalextensionmodulewithrelayoutputs
Outdoortemperaturesensor
(mandatory)Commonboilertemperaturesensor
S5Returntemperaturesensor
S7
(S10)
P1
Roomtemperaturesensor/ECA30
(Externaltemperaturecontrol,notillustrated)
Circulationpump
B1–B8Burner1...8
A1
Thecontrollerispre-programmedwithfactorysettingsthatareshown
intherelevantchaptersofthisguide.
Boilersequencerotation/shifttakesplaceatmidnight.
Alarm
Ifthemeasuredroomtemperature(S7orRemotecontrolunitECA
30)doesnotequalthedesiredroomtemperature,thedesired
boilertemperaturecanbeadjusted.
Thecirculationpump(P1)isONatheatdemandoratfrost
protection.
TheheatingcanbeswitchedOFFwhentheoutdoortemperatureis
higherthanasetvalue.
Thedesiredcommonboilertemperaturecan,viaS10,becontrolled
bymeansofanexternalvoltageintherange0-10volt.
16|©Danfoss|2021.04
AQ042286456873en-010501
OperatingGuideECLComfort210/296/310,applicationA275/A375
TheapplicationA375.2isveryflexible.Thesearethebasic
principles:
TheapplicationsA375.1/A375.2/A375.3canON/OFFcontrolup
to8burnersteps.
InapplicationA375.2thefirst2burnerstepsarecontrolledby
relaysintheECL310.Thenext,max.4burnersteps,arecontrolled
byrelaysintheextensionmoduleECA32(placedinthebasepartof
theECL310).Thelast,max.2burnerstepsarecontrolledbytriacs
intheECL310.Auxillaryrelaysmustbeconnectedtothetriacs.
Heating(circuit1):
Typically,thecommonboilertemperatureisadjustedaccordingto
yourrequirements.TheboilertemperaturesensorS3isthemost
importantsensor.Itmustbeplacedcorrectlyinordertomeasure
thecommonboilertemperature.Thedesiredboilertemperature
atS3iscalculatedintheECLcontroller,basedontheoutdoor
temperature(S1)andthedesiredroomtemperature.Thelowerthe
outdoortemperature,thehigherthedesiredboilertemperature.
Theboilertemperatureisalsotheflowtemperatureinthedirect
connectedheatingcircuit.
Bymeansofaweekschedule(upto3‘Comfort’periods/day),the
heatingcircuitcanbein‘Comfort’or‘Saving’mode(twodifferent
temperaturevaluesforthedesiredroomtemperature).In'Saving'
modea'Totalstop'functioncanbeselectedinordertoswitchOFF
theheating.
ThefirstburnerstepisswitchedONwhenthecommonboiler
temperatureislowerthanthedesiredboilertemperature.The
controllerobservesthecommonboilertemperatureandswitches
ONthenextburnerstepifthecommonboilertemperaturedoes
notincreasesatisfactorily.TheswitchingOFFprocedureofburner
stepsisviceversa.AswitchingdifferencedeterminestheON/OFF
control.
Theburnerscanbecontrolledin:
•fixedsequence(example:Always1-2-3-4-5)or
•automaticrotatingsequence(example:Firstperiod:1-2-3-4-5,
secondperiod:2-3-4-5-1,thirdperiod:3-4-5-1-2andsoon)
•semi-automaticrotatingsequence(example:Firstperiod:1,
2-3-4-5,secondperiod:1,3-4-5-2,thirdperiod:1,4-5-2-3and
soon)
Furthermore,theboilerprotectionfunctionwillswitchONthe
circulationpumpwhentheboilertemperaturegetsabovea
minimumvalue.AminimumON-timecanbesetfortheburnerin
ordertoincreasetheboiler'sefficiency.
TypicalA375.2application:
*Pressurereliefvalve
Theshowndiagramisafundamentalandsimplifiedexampleanddoes
notcontainallcomponentsthatarenecessaryinasystem.
AllnamedcomponentsareconnectedtotheECLComfortcontroller.
Listofcomponents:
ECL310
ECA32
S1
S3
ElectroniccontrollerECLComfort310
Internalextensionmodulewithrelayoutputs
Outdoortemperaturesensor
(mandatory)Commonboilertemperaturesensor
S5Returntemperaturesensor
S6
S7
(S10)
P1
DHWtanktemperaturesensor
Roomtemperaturesensor/ECA30
(Externaltemperaturecontrol,notillustrated)
Circulationpump,heating
B1–B8Burner1...8
P3
A1
DHWheatingpump
Alarm
Thereturntemperature(S5)totheboilershouldnotbetoo
high(condensingboiler)ortoolow(oilorgasfiredboiler).Ifso,
thedesiredboilertemperaturecanbedecreasedorincreased.
Furthermore,thereturntemperaturelimitationcanbedependent
ontheoutdoortemperature.Typically,thelowertheoutdoor
temperature,thehighertheacceptedreturntemperature.
Ifthemeasuredroomtemperature(S7orRemotecontrolunitECA
30)doesnotequalthedesiredroomtemperature,thedesired
boilertemperaturecanbeadjusted.
Thecirculationpump(P1)isONatheatdemandoratfrost
protection.
TheheatingcanbeswitchedOFFwhentheoutdoortemperatureis
higherthanasetvalue.
Thedesiredcommonboilertemperaturecan,viaS10,becontrolled
bymeansofanexternalvoltageintherange0-10volt.
AQ042286456873en-010501
Thecontrollerispre-programmedwithfactorysettingsthatareshown
intherelevantchaptersofthisguide.
Boilersequencerotation/shifttakesplaceatmidnight.
©Danfoss|2021.04|17
OperatingGuideECLComfort210/296/310,applicationA275/A375
A375.2,basicprinciples,continued:
DHW(circuit2):
Bymeansofaweekschedule(upto3‘Comfort’periods/day),the
DHWcircuitcanbein‘Comfort’or‘Saving’mode(twodifferent
temperaturevaluesfordesiredDHWtemperature).
IfthemeasuredDHWtemperature(S6)islowerthanthedesired
DHWtemperature,theDHWheatingprocedurestarts:
•ThecirculationpumpP1intheheatingcircuitisswitchedOFF
•TheDHWheatingpumpP3isswitchedON
•ThedesiredboilertemperatureatS3isincreased.
Thedesiredboilertemperatureistypically10-15degreeshigher
thanthedesiredDHWtemperature.
WhenthemeasuredDHWtemperature(S6)getshigherthanthe
desiredDHWtemperature,theDHWheatingpump(P3)isswitched
OFF.StartandstopdifferencesdeterminetheON/OFFcontrol.A
post-runtimecanbeset.
TheDHWcirculationpump(P4)hasaweekscheduleforupto3
ONperiodsperday.
Ananti-bacteriafunctionisavailableforactivationonselected
daysoftheweek.
TheDHWheatingcanhavepriority,i.e.pumpP3isONandpump
P1isOFF.Iftheapplicationhasachangeovervalve(priorityvalve)
fortheDHWheating,thecirculationpumpP1isstillONduring
DHWheating.
TypicalA375.2application:
*Pressurereliefvalve
Theshowndiagramisafundamentalandsimplifiedexampleanddoes
notcontainallcomponentsthatarenecessaryinasystem.
AllnamedcomponentsareconnectedtotheECLComfortcontroller.
Listofcomponents:
ECL310
ECA32
S1
S3
ElectroniccontrollerECLComfort310
Internalextensionmodulewithrelayoutputs
Outdoortemperaturesensor
(mandatory)Commonboilertemperaturesensor
S5Returntemperaturesensor
S6
S7
(S10)
P1
DHWtanktemperaturesensor
Roomtemperaturesensor/ECA30
(Externaltemperaturecontrol,notillustrated)
Circulationpump,heating
B1–B8Burner1...8
P3
A1
DHWheatingpump
Alarm
18|©Danfoss|2021.04
Thecontrollerispre-programmedwithfactorysettingsthatareshown
intherelevantchaptersofthisguide.
AQ042286456873en-010501
OperatingGuideECLComfort210/296/310,applicationA275/A375
TheapplicationA375.3isveryflexible.Thesearethebasic
principles:
TheapplicationsA375.1/A375.2/A375.3canON/OFFcontrolup
to8burnersteps.
InapplicationA375.3thefirst2burnerstepsarecontrolledby
relaysintheECL310.Thenext,max.4burnersteps,arecontrolled
byrelaysintheextensionmoduleECA32(placedinthebasepartof
theECL310).Thelast,max.2burnerstepsarecontrolledbytriacs
intheECL310.Auxillaryrelaysmustbeconnectedtothetriacs.
Heating(circuit1):
Typically,thecommonboilertemperatureisadjustedaccordingto
yourrequirements.TheboilertemperaturesensorS3isthemost
importantsensor.Itmustbeplacedcorrectlyinordertomeasure
thecommonboilertemperature.Thedesiredboilertemperature
atS3iscalculatedintheECLcontroller,basedontheoutdoor
temperature(S1)andthedesiredroomtemperature.Thelowerthe
outdoortemperature,thehigherthedesiredboilertemperature.
Theboilertemperatureisalsotheflowtemperatureinthedirect
connectedheatingcircuit.
Bymeansofaweekschedule(upto3‘Comfort’periods/day),the
heatingcircuitcanbein‘Comfort’or‘Saving’mode(twodifferent
temperaturevaluesforthedesiredroomtemperature).In'Saving'
modea'Totalstop'functioncanbeselectedinordertoswitchOFF
theheating.
ThefirstburnerstepisswitchedONwhenthecommonboiler
temperatureislowerthanthedesiredboilertemperature.The
controllerobservesthecommonboilertemperatureandswitches
ONthenextburnerstepifthecommonboilertemperaturedoes
notincreasesatisfactorily.TheswitchingOFFprocedureofburner
stepsisviceversa.AswitchingdifferencedeterminestheON/OFF
control.
Theburnerscanbecontrolledin:
•fixedsequence(example:Always1-2-3-4-5)or
•automaticrotatingsequence(example:Firstperiod:1-2-3-4-5,
secondperiod:2-3-4-5-1,thirdperiod:3-4-5-1-2andsoon)
•semi-automaticrotatingsequence(example:Firstperiod:1,
2-3-4-5,secondperiod:1,3-4-5-2,thirdperiod:1,4-5-2-3and
soon)
Furthermore,theboilerprotectionfunctionwillswitchONthe
circulationpumpwhentheboilertemperaturegetsabovea
minimumvalue.AminimumON-timecanbesetfortheburnerin
ordertoincreasetheboiler'sefficiency.
Thereturntemperature(S5)totheboilershouldnotbetoo
high(condensingboiler)ortoolow(oilorgasfiredboiler).Ifso,
thedesiredboilertemperaturecanbedecreasedorincreased.
Furthermore,thereturntemperaturelimitationcanbedependent
ontheoutdoortemperature.Typically,thelowertheoutdoor
temperature,thehighertheacceptedreturntemperature.
TypicalA375.3application:
*Pressurereliefvalve
Theshowndiagramisafundamentalandsimplifiedexampleanddoes
notcontainallcomponentsthatarenecessaryinasystem.
AllnamedcomponentsareconnectedtotheECLComfortcontroller.
Listofcomponents:
ECL310
ECA32
S1
ElectroniccontrollerECLComfort310
Internalextensionmodulewithrelayoutputs
Outdoortemperaturesensor
S2Returntemperaturesensor,circuit2
S3
S4
(mandatory)Commonboilertemperaturesensor,circuit1
Flowtemperaturesensor,circuit2
S5Returntemperaturesensor,circuit1
S7
S8
(S10)
M2
P1
Roomtemperaturesensor/ECA30,circuit1
Roomtemperaturesensor/ECA30,circuit2
(Externaltemperaturecontrol,notillustrated)
Motorizedcontrolvalve,circuit2
Circulationpump,circuit1
B1–B8Burner1...8
P3
A1
DHWheatingpump,circuit3
Alarm
Ifthemeasuredroomtemperature(S7orRemotecontrolunitECA
30)doesnotequalthedesiredroomtemperature,thedesired
boilertemperaturecanbeadjusted.
Thecirculationpump(P1)isONatheatdemandoratfrost
protection.
TheheatingcanbeswitchedOFFwhentheoutdoortemperatureis
higherthanasetvalue.
Thedesiredcommonboilertemperaturecan,viaS10,becontrolled
bymeansofanexternalvoltageintherange0-10volt.
AQ042286456873en-010501
Thecontrollerispre-programmedwithfactorysettingsthatareshown
intherelevantchaptersofthisguide.
Boilersequencerotation/shifttakesplaceatmidnight.
©Danfoss|2021.04|19
OperatingGuideECLComfort210/296/310,applicationA275/A375
A375.3,basicprinciples,continued:
Heating(circuit2):
Typically,theflowtemperatureisadjustedaccordingtoyour
requirements.TheflowtemperaturesensorS4isthemost
importantsensor.ThedesiredflowtemperatureatS4iscalculated
intheECLcontroller,basedontheoutdoortemperature(S1).
Thelowertheoutdoortemperature,thehigherthedesiredflow
temperature.
Bymeansofaweekschedule(upto3‘Comfort’periods/day),the
heatingcircuitcanbein‘Comfort’or‘Saving’mode(twodifferent
temperaturevaluesforthedesiredroomtemperature).In'Saving'
modea'Totalstop'functioncanbeselectedinordertoswitchOFF
theheating.
ThemotorizedcontrolvalveM2isopenedgraduallywhentheflow
temperature,S4,islowerthanthedesiredflowtemperatureand
viceversa.
ThedesiredflowtemperatureatS4willtypicallydeterminethe
desiredboilertemperature(S3).
Thereturntemperature(S2)canbelimited.Ifso,thedesiredflow
temperatureatS4canbedecreasedorincreased.
Furthermore,thereturntemperaturelimitationcanbedependent
ontheoutdoortemperature.Typically,thelowertheoutdoor
temperature,thehighertheacceptedreturntemperature.
Ifthemeasuredroomtemperature(measuredbyS8ortheremote
controlunitECA30)doesnotequalthedesiredroomtemperature,
thedesiredflowtemperaturecanbeadjusted.
Thecirculationpump(P4)isONatheatdemandoratfrost
protection.
TheheatingcanbeswitchedOFFwhentheoutdoortemperatureis
higherthanaselectablevalueoraDHWheatingpriorityispresent.
TypicalA375.3application:
*Pressurereliefvalve
Theshowndiagramisafundamentalandsimplifiedexampleanddoes
notcontainallcomponentsthatarenecessaryinasystem.
AllnamedcomponentsareconnectedtotheECLComfortcontroller.
Listofcomponents:
ECL310
ECA32
S1
ElectroniccontrollerECLComfort310
Internalextensionmodulewithrelayoutputs
Outdoortemperaturesensor
S2Returntemperaturesensor,circuit2
S3
S4
(mandatory)Commonboilertemperaturesensor,circuit1
Flowtemperaturesensor,circuit2
S5Returntemperaturesensor,circuit1
S7
S8
(S10)
M2
P1
Roomtemperaturesensor/ECA30,circuit1
Roomtemperaturesensor/ECA30,circuit2
(Externaltemperaturecontrol,notillustrated)
Motorizedcontrolvalve,circuit2
Circulationpump,circuit1
B1–B8Burner1...8
P3
A1
DHWheatingpump,circuit3
Alarm
20|©Danfoss|2021.04
Thecontrollerispre-programmedwithfactorysettingsthatareshown
intherelevantchaptersofthisguide.
AQ042286456873en-010501
OperatingGuideECLComfort210/296/310,applicationA275/A375
A375.3,basicprinciples,continued:
DHW(circuit3):
Bymeansofaweekschedule(upto3‘Comfort’periods/day),the
DHWcircuitcanbein‘Comfort’or‘Saving’mode(twodifferent
temperaturevaluesfordesiredDHWtemperature).
IfthemeasuredDHWtemperature(S6)islowerthanthedesired
DHWtemperature,theDHWheatingprocedurestarts:
•ThecirculationpumpP1intheheatingcircuitisswitchedOFF
•TheDHWheatingpumpP3isswitchedON
•ThedesiredboilertemperatureatS3isincreased.
Thedesiredboilertemperatureistypically10-15degreeshigher
thanthedesiredDHWtemperature.
WhenthemeasuredDHWtemperature(S6)getshigherthanthe
desiredDHWtemperature,theDHWheatingpump(P3)isswitched
OFF.StartandstopdifferencesdeterminetheON/OFFcontrol.A
post-runtimecanbeset.
Ananti-bacteriafunctionisavailableforactivationonselected
daysoftheweek.
TheDHWheatingcanhavepriority,i.e.pumpP3isONandpump
P1isOFF.Iftheapplicationhasachangeovervalve(priorityvalve)
fortheDHWheating,thecirculationpumpP1isstillONduring
DHWheating.
TypicalA375.3application:
*Pressurereliefvalve
Theshowndiagramisafundamentalandsimplifiedexampleanddoes
notcontainallcomponentsthatarenecessaryinasystem.
AllnamedcomponentsareconnectedtotheECLComfortcontroller.
Listofcomponents:
ECL310
ECA32
S1
ElectroniccontrollerECLComfort310
Internalextensionmodulewithrelayoutputs
Outdoortemperaturesensor
S2Returntemperaturesensor,circuit2
S3
S4
(mandatory)Commonboilertemperaturesensor,circuit1
Flowtemperaturesensor,circuit2
S5Returntemperaturesensor,circuit1
S7
S8
(S10)
M2
P1
Roomtemperaturesensor/ECA30,circuit1
Roomtemperaturesensor/ECA30,circuit2
(Externaltemperaturecontrol,notillustrated)
Motorizedcontrolvalve,circuit2
Circulationpump,circuit1
B1–B8Burner1...8
P3
A1
DHWheatingpump,circuit3
Alarm
Thecontrollerispre-programmedwithfactorysettingsthatareshown
intherelevantchaptersofthisguide.
AQ042286456873en-010501
©Danfoss|2021.04|21
OperatingGuideECLComfort210/296/310,applicationA275/A375
TheapplicationA375.4isveryflexible.Thesearethebasic
principles:
Heating(circuit1):
Typically,theboilertemperatureisadjustedaccordingtoyour
requirements.TheboilertemperaturesensorS3isthemost
importantsensor.Itmustbeplacedcorrectlytomeasuretheboiler
temperature.ThedesiredboilertemperatureatS3iscalculatedin
theECLcontroller,basedontheoutdoortemperature(S1)andthe
desiredroomtemperature.Thelowertheoutdoortemperature,
thehigherthedesiredboilertemperature.Theboilertemperature
isalsotheflowtemperatureinthedirectconnectedheatingcircuit.
Bymeansofaweekschedule(upto3‘Comfort’periods/day),the
heatingcircuitcanbein‘Comfort’or‘Saving’mode(twodifferent
temperaturevaluesforthedesiredroomtemperature).In'Saving'
modea'Totalstop'functioncanbeselectedtoswitchOFFthe
heating.
Theburneris,viarelayoutput2,switchedONwhentheboiler
temperatureislowerthanthedesiredboilertemperatureand
switchedOFFwhentheboilertemperatureishigherthanthe
desiredboilertemperature.Aswitchingdifferencedeterminesthe
ON/OFFcontrol.
Advancedboilercontrol:
1.A0-10VoltsignalfromtheinternalmoduleECA32canbe
appliedtotheboilerforsettingthedesiredboilertemperature.
2.A3-pointsignal,viaM3,canbeappliedtotheboilerforsetting
thedesiredboilertemperature.Itisrecommendedtoseparate
galvanicallytheECL'sM3outputfromtheboiler's3-pointinput.
Typically,thiscanbedonebymeansofSolid-Staterelays.
SeetheInstallationGuideforconnections.
TheboilerprotectionfunctionwillonlyswitchONthecirculation
pumpiftheboilertemperaturegetsaboveaminimum
temperature.AminimumON-timecanbesetfortheburnerto
increasetheboiler'sefficiency.
Thereturntemperature(S5)totheboilershouldnotbetoohigh
(condensingboiler)ortoolow(oilorgasfiredboiler).Ifso,the
desiredboilertemperaturecanbedecreasedorincreased.
Furthermore,thereturntemperaturelimitationcanbedependent
ontheoutdoortemperature.Typically,thelowertheoutdoor
temperature,thehighertheacceptedreturntemperature.
Ifthemeasuredroomtemperature(measuredbyS7ortheremote
controlunitECA30)doesnotequalthedesiredroomtemperature,
thedesiredboilertemperaturecanbeadjusted.
Thecirculationpump(P1)isONatheatdemandoratfrost
protection.
TypicalA375.4application:
*Pressurereliefvalve
Theshowndiagramisafundamentalandsimplifiedexampleanddoes
notcontainallcomponentsthatarenecessaryinasystem.
AllnamedcomponentsareconnectedtotheECLComfortcontroller.
Listofcomponents:
ECL310
ECA32
S1
S3
ElectroniccontrollerECLComfort310
Internalextensionmodulewithanalogoutputs
Outdoortemperaturesensor
(mandatory)Boilertemperaturesensor
S5Returntemperaturesensor
S7
Roomtemperaturesensor/ECA30
S9Pressuresensor
P1
B1
V1
M3
A1
Circulationpump
Burner,ON/OFFcontrol
Burner,0-10Vtemperaturecontrol
(notillustrated)3-pointcontrolofboilertemperature
Alarm
Thecontrollerispre-programmedwithfactorysettingsthatareshown
intherelevantchaptersofthisguide.
TheheatingcanbeswitchedOFFiftheoutdoortemperaturegets
higherthanasetvalue.
A375.4canalsoruntheinstallationslikeA275.1,ex.aandex.b.
ThedifferencebetweenA375.4andA275.1is:
•A375.4hasadvancedboilercontrol
•A375.4canmeasurepressureviatransmitterandgenerate
alarm
22|©Danfoss|2021.04
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OperatingGuideECLComfort210/296/310,applicationA275/A375
TheapplicationA375.5isveryflexible.Thesearethebasic
principles:
Heating(circuit1):
Typically,theboilertemperatureisadjustedaccordingtoyour
requirements.TheboilertemperaturesensorS3isthemost
importantsensor.Itmustbeplacedcorrectlytomeasuretheboiler
temperature.ThedesiredboilertemperatureatS3iscalculatedin
theECLcontroller,basedontheoutdoortemperature(S1)andthe
desiredroomtemperature.Thelowertheoutdoortemperature,
thehigherthedesiredboilertemperature.Theboilertemperature
isalsotheflowtemperatureinthedirectconnectedheatingcircuit.
Bymeansofaweekschedule(upto3‘Comfort’periods/day),the
heatingcircuitcanbein‘Comfort’or‘Saving’mode(twodifferent
temperaturevaluesforthedesiredroomtemperature).In'Saving'
modea'Totalstop'functioncanbeselectedtoswitchOFFthe
heating.
Theburneris,viarelayoutput2,switchedONwhentheboiler
temperatureislowerthanthedesiredboilertemperatureand
switchedOFFwhentheboilertemperatureishigherthanthe
desiredboilertemperature.Aswitchingdifferencedeterminesthe
ON/OFFcontrol.
Advancedboilercontrol:
1.A0-10VoltsignalfromtheinternalmoduleECA32canbe
appliedtotheboilerforsettingthedesiredboilertemperature.
2.A3-pointsignal,viaM3,canbeappliedtotheboilerforsetting
thedesiredboilertemperature.Itisrecommendedtoseparate
galvanicallytheECL'sM3outputfromtheboiler's3-pointinput.
Typically,thiscanbedonebymeansofSolid-Staterelays.
SeetheInstallationGuideforconnections.
TheboilerprotectionfunctionwillonlyswitchONthecirculation
pumpiftheboilertemperaturegetsaboveaminimum
temperature.AminimumON-timecanbesetfortheburnerto
increasetheboiler'sefficiency.
Thereturntemperature(S5)totheboilershouldnotbetoohigh
(condensingboiler)ortoolow(oilorgasfiredboiler).Ifso,the
desiredboilertemperaturecanbedecreasedorincreased.
Furthermore,thereturntemperaturelimitationcanbedependent
ontheoutdoortemperature.Typically,thelowertheoutdoor
temperature,thehighertheacceptedreturntemperature.
Ifthemeasuredroomtemperature(measuredbyS7ortheremote
controlunitECA30)doesnotequalthedesiredroomtemperature,
thedesiredboilertemperaturecanbeadjusted.
Thecirculationpump(P1)isONatheatdemandoratfrost
protection.
TheheatingcanbeswitchedOFFiftheoutdoortemperaturegets
higherthanasetvalue.
TypicalA375.5application:
*Pressurereliefvalve
Theshowndiagramisafundamentalandsimplifiedexampleanddoes
notcontainallcomponentsthatarenecessaryinasystem.
AllnamedcomponentsareconnectedtotheECLComfortcontroller.
Listofcomponents:
ECL310
ECA32
S1
ElectroniccontrollerECLComfort310
Internalextensionmodulewithanalogoutputs
Outdoortemperaturesensor
S2Returntemperaturesensor,circuit2
S3
S4
(mandatory)Boilertemperaturesensor
Flowtemperaturesensor,circuit2
S5Returntemperaturesensor
S6
S7
S8
DHWtanktemperaturesensor
Roomtemperaturesensor/ECA30
Roomtemperaturesensor/ECA30,circuit2
S9Pressuresensor
P1
P3
P4
P5
B1
V1
M2
M3
A1
Circulationpump
DHWheatingpump
Circulationpump,circuit2
DHWcirculationpump
Burner,ON/OFFcontrol
Burner,0-10Vtemperaturecontrol
Motorizedcontrolvalve,circuit2
(notillustrated)3-pointcontrolofboilertemperature
Alarm
Thecontrollerispre-programmedwithfactorysettingsthatareshown
intherelevantchaptersofthisguide.
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OperatingGuideECLComfort210/296/310,applicationA275/A375
A375.5,basicprinciples,continued:
Heating(circuit2):
Typically,theflowtemperatureisadjustedaccordingtoyour
requirements.TheflowtemperaturesensorS4isthemost
importantsensor.ThedesiredflowtemperatureatS4iscalculated
intheECLcontroller,basedontheoutdoortemperature(S1)and
thedesiredroomtemperature.Thelowertheoutdoortemperature,
thehigherthedesiredflowtemperature.
Bymeansofaweekschedule(upto3‘Comfort’periods/day),the
heatingcircuitcanbein‘Comfort’or‘Saving’mode(twodifferent
temperaturevaluesforthedesiredroomtemperature).In'Saving'
modea'Totalstop'functioncanbeselectedtoswitchOFFthe
heating.
ThemotorizedcontrolvalveM2isopenedgraduallywhentheflow
temperature,S4,islowerthanthedesiredflowtemperatureand
viceversa.
ThedesiredflowtemperatureatS4willtypicallydeterminethe
desiredboilertemperature(S3).
Thereturntemperature(S2)canbelimited.Ifso,thedesiredflow
temperatureatS4canbedecreasedorincreased.
Furthermore,thereturntemperaturelimitationcanbedependent
ontheoutdoortemperature.Typically,thelowertheoutdoor
temperature,thehighertheacceptedreturntemperature.
TypicalA375.5application:
*Pressurereliefvalve
Theshowndiagramisafundamentalandsimplifiedexampleanddoes
notcontainallcomponentsthatarenecessaryinasystem.
AllnamedcomponentsareconnectedtotheECLComfortcontroller.
Ifthemeasuredroomtemperature(measuredbyS8ortheremote
controlunitECA30)doesnotequalthedesiredroomtemperature,
thedesiredflowtemperaturecanbeadjusted.
Thecirculationpump(P4)isONatheatdemandoratfrost
protection.
TheheatingcanbeswitchedOFFwhentheoutdoortemperatureis
higherthanaselectablevalueoraDHWheatingpriorityispresent.
Listofcomponents:
ECL310
ECA32
S1
ElectroniccontrollerECLComfort310
Internalextensionmodulewithanalogoutputs
Outdoortemperaturesensor
S2Returntemperaturesensor,circuit2
S3
S4
(mandatory)Boilertemperaturesensor
Flowtemperaturesensor,circuit2
S5Returntemperaturesensor
S6
S7
S8
DHWtanktemperaturesensor
Roomtemperaturesensor/ECA30
Roomtemperaturesensor/ECA30,circuit2
S9Pressuresensor
P1
P3
P4
P5
B1
V1
M2
M3
A1
Circulationpump
DHWheatingpump
Circulationpump,circuit2
DHWcirculationpump
Burner,ON/OFFcontrol
Burner,0-10Vtemperaturecontrol
Motorizedcontrolvalve,circuit2
(notillustrated)3-pointcontrolofboilertemperature
Alarm
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Thecontrollerispre-programmedwithfactorysettingsthatareshown
intherelevantchaptersofthisguide.
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OperatingGuideECLComfort210/296/310,applicationA275/A375
A375.5,basicprinciples,continued:
DHW(circuit3):
Bymeansofaweekschedule(upto3‘Comfort’periods/day),the
DHWcircuitcanbein‘Comfort’or‘Saving’mode(twodifferent
temperaturevaluesfordesiredDHWtemperature).
IfthemeasuredDHWtemperature(S6)islowerthanthedesired
DHWtemperature,theDHWheatingprocedurestarts:
•ThecirculationpumpP1intheheatingcircuitisswitchedOFF
•TheDHWheatingpumpP3isswitchedON
•ThedesiredboilertemperatureatS3isincreased.
Thedesiredboilertemperatureistypically10-15degreeshigher
thanthedesiredDHWtemperature.
WhenthemeasuredDHWtemperature(S6)getshigherthanthe
desiredDHWtemperature,theDHWheatingpump(P3)isswitched
OFF.StartandstopdifferencesdeterminetheON/OFFcontrol.A
post-runtimecanbeset.
Ananti-bacteriafunctionisavailableforactivationontheselected
daysoftheweek.
TheDHWheatinghaspriority,i.e.pumpP3isONandpumpP1is
OFF.Iftheapplicationhasachangeovervalve(priorityvalve)for
theDHWheating,thecirculationpumpP1isstillONduringDHW
heating.
TypicalA375.5application:
*Pressurereliefvalve
Theshowndiagramisafundamentalandsimplifiedexampleanddoes
notcontainallcomponentsthatarenecessaryinasystem.
AllnamedcomponentsareconnectedtotheECLComfortcontroller.
A375.5canalsoruntheinstallationslikeA275.3,ex.a.-A275.3,
ex.g.
ThedifferenciesbetweenA375.5andA275.3are:
•A375.5hasadvancedboilercontrol
•A375.5hasalarmoutput(A1)
•A375.4canmeasurepressureviatransmitterandgenerate
alarm
Listofcomponents:
ECL310
ECA32
S1
ElectroniccontrollerECLComfort310
Internalextensionmodulewithanalogoutputs
Outdoortemperaturesensor
S2Returntemperaturesensor,circuit2
S3
S4
(mandatory)Boilertemperaturesensor
Flowtemperaturesensor,circuit2
S5Returntemperaturesensor
S6
S7
S8
DHWtanktemperaturesensor
Roomtemperaturesensor/ECA30
Roomtemperaturesensor/ECA30,circuit2
S9Pressuresensor
P1
P3
P4
P5
B1
V1
M2
M3
A1
Circulationpump
DHWheatingpump
Circulationpump,circuit2
DHWcirculationpump
Burner,ON/OFFcontrol
Burner,0-10Vtemperaturecontrol
Motorizedcontrolvalve,circuit2
(notillustrated)3-pointcontrolofboilertemperature
Alarm
Thecontrollerispre-programmedwithfactorysettingsthatareshown
intherelevantchaptersofthisguide.
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OperatingGuideECLComfort210/296/310,applicationA275/A375
ApplicationA375ingeneral:
UptotwoRemoteControlUnits,ECA30/31,canbeconnectedto
oneECLcontrollertocontroltheECLcontrollerremotely.
Exerciseofcirculationpumpsandcontrolvalveinperiodswithout
heatingdemandcanbearranged.
AdditionalECLComfortcontrollerscanbeconnectedviatheECL
485bustoutilizecommonoutdoortemperaturesignal,timeand
datesignals.
SeveralECLcontrollers,internallyconnectedviaECL485bus,work
inMaster/Slaveconnection.InaMaster/Slavesystemmaximum
2ECA30/31canbepresent.
Unusedinput(fromS7andup)can,bymeansofanoverride
switch,beusedtooverridethescheduletoafixed'Comfort'or
'Saving'mode.
Modbuscommunication(ECL296andECL310)toaSCADAsystem
canbeestablished.
ECLPortal,Internetbasedconnection,allowsECL296,310and
310Btobemonitoredandcontrolledremotelyviastandard
Internetbrowsers(forexampleInternetExplorer,GoogleChrome
andSafari).
Heat-meters:
Upto5heat-meterscanbeconnectedtotheM-busterminals(ECL
296/310).
DatacanbetransferredtotheSCADAsystemviaModbusandTCP/
IPtotheECLPortal.
ModbuscommunicationtoaSCADAsystemcanbeestablished.
TheM-busdata(ECLComfort296/310)canfurthermorebe
transferredtotheModbuscommunication.
Alarm,A375:
AlarmA1(relayR6)andthealarmsymbol(
•ifatemperaturesensororitsconnectiondisconnects/
shortcircuits.
Alarm,A375.3andA375.5:
AlarmA1(relayR6)andthealarmsymbol(
•iftheactualflowtemperatureatS4(heatingcircuit2),differs
fromthedesiredflowtemperature.
Alarm,A375.4,A375.5:
AlarmA1(relayR6)andthealarmsymbol(
•ifthepressure,measuredbyS9,getshigherorlowerthanset
alarmvalues.
)canbeactivated:
)canbeactivated:
)canbeactivated:
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OperatingGuideECLComfort210/296/310,applicationA275/A375
ApplicationA375ingeneral,continued:
Offsetadjustment
Ameasuredtemperaturecanbeoffsetadjusted,ifneeded.
(Navigation:MENU>Commoncontroller>System>Sensoroffset)
Inputconfiguration
Inputs(asfromS7andup),whicharenotpartoftheapplication
canbeconfiguredtobePt1000,0-10Volt,frequency(pulse
counter)ordigitalinput.ThisfeaturemakesitpossibleinECL296/
310tocommunicateextrasignals,suchastemperatures,pressures,
ON/OFFconditions,viaModbusandECLPortal.
TheconfigurationisdonebymeansoftheECLTool(freesoftware
fordownload)ordirectlyinadedicatedmenuintheECLPortalor
theconnectionforModbus(BMS/SCADA).
Applicationupload
Theapplicationuploadprocedureisthefollowingafterhaving
powereduptheECLComfortcontroller:
1.Inserttheapplicationkey
2.Selectlanguage,*1,*2
3.Selectsubtype(theInstallationGuideshowssubtypes)
4.SetTimeandDate
TheECLComfortcontrollerinstallstheapplication,initializesand
restarts.Outputrelaysareactivated/de-activated(click-sounds
fromthiscanbeheard).Thisalsomeansthat,forexample,
circulationpumpscanbeswitchedONandOFFshortly.
*1:Seealsosection"InsertingtheECLApplicationKey" .
*2:(ECLComfort310,24Volt)Iflanguagecannotbeselected,the
powersupplyisnota.c.(alternatingcurrent).
Commissioning
WhentheselectedapplicationhasbeenuploadedtheECLComfort
controllerstartsinManualmode.Thiscanbeusedtoverifycorrect
connectionsof,forexample,temperature,pressureandflow
sensors.Alsoverifyingthecontrolledcomponents(valveactuators,
pumps,burneretc.)forcorrectfunctionalitycanbedone.
Theapplicationkeyisdeliveredwithfactorysettings.
Dependingonsystemtype,itmightbenecessarytochangesome
factorysettingsindividuallyforoptimizingthefunctionality.
Theapplicationkeymustbeinsertedforchangingsettings.
Power-down/power-up
WhenthepowersupplytotheECLComfortcontrolleris
disconnected(power-down),theoutputrelaysgotode-activated
position.
Thismeansthat,forexample,circulationpumpsandburnercanbe
switchedON.
SeetheelectricalconnectiondiagramsintheInstallationGuide.
Allrelaycontactsareshowninde-activatedsituation.Somerelay
contactsareclosed,somerelaycontactsareopen.
WhenthepowersupplytotheECLComfortcontrolleris
re-established(power-up),theoutputrelaysareactivated/
de-activated(click-soundsfromthiscanbeheard).Thisalsomeans
that,forexample,circulationpumpsandburnercanbeswitched
ONandOFFshortly.
ImportantforA375.3andA375.5:
•Setthecorrectrunningtime"Mrun"oftheMotorizedControl
ValveM2.(Circuit2>MENU>Settings>Controlparameters
>Mrun).
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OperatingGuideECLComfort210/296/310,applicationA275/A375
Thecontrollerispre-programmedwithfactorysettingsthatareshown
inthe‘ParameterIDoverview’appendix.
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OperatingGuideECLComfort210/296/310,applicationA275/A375
2.2Identifyingthesystemtype
Sketchyourapplication
TheECLComfortcontrollerseriesisdesignedforawiderange
ofheating,domestichot-water(DHW)andcoolingsystemswith
differentconfigurationsandcapacities.Ifyoursystemdiffers
fromthediagramsshownhere,youmaywanttomakeasketch
ofthesystemabouttobeinstalled.Thismakesiteasiertouse
theOperatingGuide,whichwillguideyoustep-by-stepfrom
installationtofinaladjustmentsbeforetheend-usertakesover.
TheECLComfortcontrollerisauniversalcontrollerthatcanbe
usedforvarioussystems.Basedontheshownstandardsystems,
itispossibletoconfigureadditionalsystems.Inthischapteryou
findthemostfrequentlyusedsystems.Ifyoursystemisnotquite
asshownbelow,findthediagramwhichhasthebestresemblance
withyoursystemandmakeyourowncombinations.
SeetheInstallationGuide(deliveredwiththeapplicationkey)for
applicationtypes/sub-types.
Thecirculationpump(s)inheatingcircuit(s)canbeplacedintheflow
aswellasthereturn.Placethepumpaccordingtothemanufacturer’s
specification.
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OperatingGuideECLComfort210/296/310,applicationA275/A375
A275applications:
SeetheInstallationGuide(deliveredwiththeapplicationkey)forapplicationexamplesandelectricalconnections.
A275.1,examplea
BoilerON/OFFcontrolforaheatingcircuit.
Thecomponentmarkedwith*isapressurereliefvalve.
A275.1,exampleb
BoilerON/OFFcontrolforaheatingcircuit.Theboilercircuitisequippedwithalowlossheader.
Thecomponentmarkedwith*isapressurereliefvalve.
A275.2,examplea
BoilerON/OFFcontrolforaheatingandaDHWcircuit.OptionalDHWpriority.
Thecomponentmarkedwith*isapressurereliefvalve.
AtDHWheatingP3isswitchedONandthedesiredboilertemperatureliesanumberofdegreesabovethedesiredDHWtemperature.
P1isswitchedOFF.
SpecialsettingsfortypeA275.2,examplea:
Navigation:
DHWcircuit(circuit2)
DHWheatingismanagedbypumpP3:
MENU\Settings\Application:'Ch.-o.valve/P'
ThedesiredDHWheatingtemperaturemustinfluencethedesiredboilertemperature:
MENU\Settings\Application:‘Tank,sec./prim.'
Pleasenote:
If'Ch.-o.valve/P'in12051issettoOFF,P3willbeswitchedonatDHWheating.Thedesiredboilertemperaturewillstillliea
numberofdegreesabovethedesiredDHWtemperatureandP1willremainswitchedON.
A275.2,exampleb
BoilerON/OFFcontrolforaheatingandaDHWcircuit.DHWpriority.
Thecomponentmarkedwith*isapressurereliefvalve.
AtDHWheatingP3(changeovervalve)isactivatedandthedesiredboilertemperatureliesanumberofdegreesabovethedesiredDHW
temperature.
P1iscontinuouslyswitchedON.
SpecialsettingsfortypeA275.2,exampleb:
IDno.:
12051
12053
Recommendedsetting:
ON
OFF
Navigation:
DHWcircuit(circuit2)
DHWheatingismanagedbychangeovervalveP3/M1:
MENU\Settings\Application:'Ch.-o.valve/P'
ThedesiredDHWheatingtemperaturemustinfluencethedesiredboilertemperature:
MENU\Settings\Application:‘Tank,sec./prim.'
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IDno.:
12051
12053
Recommendedsetting:
OFF
OFF
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