Danfoss ECL Comfort A260 User Manual

TheapplicationA275.3isveryflexible.Thesearethebasic
principles:
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
oftheoutdoortemperature.Typically,thelowertheoutdoor
temperature,thehighertheacceptedreturntemperature.
Ifthemeasuredroomtemperature(measuredbyS8ortheremote
controlunitECA30)doesnotequalthedesiredroomtemperature,
thedesiredflowtemperaturecanbeadjusted.
Thecirculationpump(P4)isONatheatdemandoratfrost
protection.
TheheatingcanbeswitchedOFFwhentheoutdoortemperatureis
higherthanaselectablevalueoraDHWheatingpriorityispresent.
TypicalA275.3application:
*Pressurereliefvalve
Theshowndiagramisafundamentalandsimplifiedexampleanddoes
notcontainallcomponentsthatarenecessaryinasystem.
AllnamedcomponentsareconnectedtotheECLComfortcontroller.
Listofcomponents:
S1
Outdoortemperaturesensor
S2
Returntemperaturesensor,circuit2
S3
Boilertemperaturesensor,circuit1
S4
Flowtemperaturesensor,circuit2
S5
Returntemperaturesensor,circuit1
S6
DHWtanktemperaturesensor
S7Roomtemperaturesensor/ECA30,circuit1
S8Roomtemperaturesensor/ECA30,circuit2
M2
Motorizedcontrolvalve,circuit2
P1
Circulationpump,circuit1
B1Burner
P3
DHWheatingpump,circuit3
P4
Circulationpump,circuit2
Thecontrollerispre-programmedwithfactorysettingsthatareshown
intherelevantchaptersofthisguide.
VI.GU.L2.02
©Danfoss|2017.09|9
OperatingGuideECLComfort210/296/310,applicationA275/A375

Danfoss ECL Comfort A260 Specifications

General

Brand	Danfoss
Model	ECL Comfort A260
Category	Controller
Language	English