OperatingGuideECLComfort310,applicationP318
2.0Installation
2.1Beforeyoustart
TheECLapplicationkeyP318containstwosubtypes,P318.1and
P318.10.
ThebasicprinciplesforapplicationP318.1:
TemperaturecontrolofDHWbuffer
ThedesiredDHWtemperatureatS6determinesthebuffercharging
procedure.ThebuffertemperaturesensorsS6andS8,thesupply
temperaturesensorS2andthechargingtemperaturesensorS3are
themostimportantsensorsandmustbeconnected.Ifoneofthe
mentionedtemperaturesensorsisnotconnected,thecontrolvalve
M1willclose;alternatively,thecontrolpumpP1/V1willstop.
ThechargingtemperatureatS3isbasedonthedesiredDHW
temperatureatS6andasetchargingdifference.
TheapplicationallowsinternalorexternalDHWcirculation.When
connectedforexternalcirculation,thedesiredS3temperatureis
thesameasthedesiredDHWtemperature,whenchargingisnot
inprogress.
Optional:TemperaturecontrolofthecirculationpipeatS9ensures
thedesiredtemperaturebymeansofON/OFFcontrolofP3or
speedcontrolofV3.Duringthechargingprocessthecirculation
pumpcanbeswitchedOFForrunataminimumspeed.
Startbufferchargingprocess:
1.BuffertemperatureS6temperaturegetslowerthan('Desired
DHWtemperature'+'Startdifference').
Anexample:60°C+(-5)=55°C
2.X1isswitchedON
3.M1openstoapresetposition(alternatively,P1/V1isswitched
ON/presetspeed)inordertoincreasethesupplytemperature
S2.Returntemperaturelimitationisrespected.
4.P2/V2isswitchedONwhensupplytemperatureS2getshigher
than('DesiredDHWtemperature'+'Pumpstartdiff.').
Anexample:60°C+3K=63°C
V2startswithminimumspeed,forexample20%.
5.M1(orP1/V1)controlsthechargingtemperatureatS3.
6.V2increasesthespeedaslongasthechargingtemperatureS3
ishigherthan(desiredchargingtemperature-2K).
Stopbufferchargingprocess:
1.BuffertemperatureS6temperaturegetshigherthan(2K+
'DesiredDHWtemperature'+'Startdifference)
AND
LowerbuffertemperatureS8getshigherthan('DesiredDHW
temperature'+'Stopdifference).
Anexample:S6temperaturehigherthan(2+60°C+(-5)=
57°C)AND(60°C+(-8)=52°C)
2.P2isswitchedOFF,respecting'Char.Ppost-run'.V2changes
to0%.
NOTE:Post-runisnotrespectedifchargingtemperatureS3islower
thandesiredchargingtemperature.
3.X1isswitchedOFF.
4.M1closes(alternatively,P1/V1stops)ormaintainsthedesired
temperatureatS3.
P318.1,ex.a,applicationwithcontrolvalveandinternalDHWcirculation:
Theshowndiagramisafundamentalandsimpliedexampleanddoes
notcontainallcomponentsthatarenecessaryinasystem.
AllnamedcomponentsareconnectedtotheECLComfortcontroller.
Listofcomponents:
ECL310
ECLComfort310controller
ECA32
Built-inextensionmodule,0-10Voutputs
ECA35
Built-inextensionmodule,0-10Voutputsand
PWMoutputs
S2
(mandatory)Supplytemperaturesensor
S3
(mandatory)Chargingtemperaturesensor
S5
Returntemperaturesensor
S6
(mandatory)Buffertemperaturesensor
S8
(mandatory)Lowerbuffertemperaturesensor
S9
DHWcirculationreturntemperaturesensor
S12
0-10VinputfordesiredtemperatureatS6
P2
Chargingpump(ON-OFFcontrolled)
V2
Speedcontrolofchargingpump(0-10VorPWM)
P3
Circulationpump(ON-OFFcontrolled)
V3
Speedcontrolofcirculationpump(0-10Vor
PWM)
M1
Motorizedcontrolvalve(3-pointcontrolled)
X1
Heatdemandsignal
A1
Alarm
6DEN-SMT/DK
VI.JM.Q3.02
DanfossDistrictEnergy