2.0Installation
2.1Beforeyoustart
Thetwoapplications,A237.1/A337.1arealmostidentical.
However,A337.1hassomeextrafunctionswhicharedescribed
additionally.
TheapplicationsA237.1/A337.1areveryflexible.Thesearethe
basicprinciples:
Heating(circuit1):
Typically,theflowtemperatureisadjustedaccordingtoyour
requirements.TheflowtemperaturesensorS3isthemost
importantsensor.ThedesiredflowtemperatureatS3iscalculated
intheECLcontroller,basedontheoutdoortemperature(S1)and
thedesiredroomtemperature.
Thelowertheoutdoortemperature,thehigherthedesiredflow
temperature.
Bymeansofaweekschedule,theheatingcircuitcanbein
‘Comfort’or‘Saving’mode.Theweekschedulecanhaveupto3
‘Comfort’periods/day.Avalueforthedesiredroomtemperature
canbesetineachofthemodes.
InSavingmodetheheatingcanbereducedorswitchedofftotally.
ThemotorizedcontrolvalveM1isopenedgraduallywhenthe
flowtemperatureislowerthanthedesiredflowtemperatureand
viceversa.
ThereturntemperatureS5canbelimited,forexamplenottobe
toohigh.Ifso,thedesiredflowtemperatureatS3canbeadjusted
(typicallytoalowervalue),thusresultinginagradualclosingof
themotorizedcontrolvalve.Furthermore,thereturntemperature
limitationcanbedependentontheoutdoortemperature.
Typically,thelowertheoutdoortemperature,thehigherthe
acceptedreturntemperature.Inboiler-basedheatingsupplythe
returntemperatureshouldnotbetoolow(sameadjustment
procedureasabove).
Ifthemeasuredroomtemperature(directlyconnectedtemperature
sensorESM-10(S2)orRemotecontrolunitECA30/31)doesnot
equalthedesiredroomtemperature,thedesiredflowtemperature
canbeadjusted.
ThecirculationpumpP1isONatheatdemandoratfrost
protection.ThecirculationpumpP1canbeswitchedOFFwhen
heatingtheDHW.Ifthesystemhasachangeovervalve(P2/M2)
betweentheheatingandDHWcircuit,thecirculationpumpP1
isONwhenheatingtheDHW.
TheheatingcanbeswitchedOFFwhentheoutdoortemperatureis
higherthanaselectablevalue.
Aconnectedfloworenergymeterbasedonpulses(S7)canlimit
thefloworenergytoasetmaximumvalue.Furthermore,the
limitationcanbeinrelationtotheoutdoortemperature.
Typically,thelowertheoutdoortemperature,thehigherthe
acceptedflow/power.
Thefrostprotectionmodemaintainsaselectableflowtemperature
value,forexample10°C.
Analarmcanbeactivatediftheactualflowtemperaturediffers
fromthedesiredflowtemperature.
TypicalA237.1/A337.1application:
Theshowndiagramisafundamentalandsimplifiedexampleanddoes
notcontainallcomponentsthatarenecessaryinasystem.
AllnamedcomponentsareconnectedtotheECLComfortcontroller.
Listofcomponents:
ECL210/296/
310
ElectroniccontrollerECLComfort210,296or310
S1
Outdoortemperaturesensor
S2
Roomtemperaturesensor
S3
Flowtemperaturesensor,circuit1
S5
Returntemperaturesensor,circuit1
S6
DHWtanktemperaturesensor,upper
S7
Flow/energymeter(pulsesignal)
S8
DHWtanktemperaturesensor,lower
P1
Circulationpump,heating,circuit1
P2DHWpump,circuit2
P3
DHWcirculationpump,circuit2
M1
Motorizedcontrolvalve(3-pointcontrolled).
Alternative:Thermoactuator(DanfosstypeABV)
A1
Alarm
6|©Danfoss|2017.06
VI.LG.R3.02
OperatingGuideECLComfort210/296/310,applicationA237/A337