Danfoss 087H3803 User Manual

TheECLComfortcontrollerdeterminesandcontrolstheflow
temperaturerelatedtotheoutdoortemperature.Thisrelationship
iscalledtheheatcurve.
Theheatcurveissetbymeansof6coordinatepoints.Thedesired
flowtemperatureissetat6pre-definedoutdoortemperature
values.
Theshownvaluefortheheatcurveisanaveragevalue(slope),
basedontheactualsettings.
Outdoor
temp.
Desiredflowtemp.
Your
settings
A
B
C
-30°C45°C75°C95°C
-15°C40°C60°C90°C
-5°C35°C50°C80°C
0°C32°C45°C70°C
5°C30°C40°C60°C
15°C25°C28°C35°C
Adjustthedesiredflowtemperatureat-30,-15,-5,0,5,and15°C,
ifrequired.
A:Exampleforfloorheating
B:Factorysettings
C:Exampleforradiatorheating(highdemand)
MENU>Settings>Flow(boiler)temperature
Heatcurve
CircuitSettingrange
Factorysetting
20.1...4.01.0
Theheatcurvecanbechangedintwoways:
1.Thevalueoftheslopeischanged(seeheatcurveexamples
onnextpage)
2.Thecoordinatesoftheheatcurvearechanged
Changethevalueoftheslope:
Pushthedialtoenter/changetheslopevalueoftheheatcurve
(example:1.0).
Whentheslopeoftheheatcurveischangedbymeansoftheslope
value,thecommonpointforallheatcurveswillbeadesiredflow
temperature=24.6°Catanoutdoortemperature=20°C
Changethecoordinates:
Pushthedialtoenter/changethecoordinatesoftheheatcurve
(example:-30,75).
Theheatcurverepresentsthedesiredflowtemperaturesat
differentoutdoortemperaturesandatadesiredroomtemperature
of20°C.
Ifthedesiredroomtemperatureischanged,thedesiredflow
temperaturealsochanges:
(DesiredroomT-20)×HC×2.5
where"HC"istheHeatCurveslopeand"2.5"isaconstant.
Desiredflowtemperature
Slopechanges
Coordinatechanges
Thecalculatedflowtemperaturecanbeinfluencedbythe‘Boost’and
‘Ramp’functionsetc.
Example:
Heatcurve:
1.0
Desiredflowtemp.:
50°C
Desiredroomtemp.:
22°C
Calculation(22–20)×1.0×2.5=
5
Result:
Thedesiredflowtemperaturewillbecorrectedfrom50°Cto55°C.
Choosingaheatcurveslope
Theheatcurvesrepresentthedesiredflowtemperatureatdifferentoutdoortemperaturesandatadesiredroomtemperatureof20°C.
VI.GU.L2.02
©Danfoss|2017.09|105
OperatingGuideECLComfort210/296/310,applicationA275/A375

Danfoss 087H3803 Specifications

General

Brand	Danfoss
Model	087H3803
Category	Controller
Language	English