Ideal Heating EVOMAX 2 - Page 30

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NOTE:Thenextsectioncanonlybeselected
insoftwarerevisionsfrom443.207.000and
above.
Plant – SL2 230V External heat source
availability and control conguration
The Master boiler can control an External
heatsourcetoprovideheatintothecascade.
Inordertodothis,itrequiresaninputsignal
to inform it as to when the External heat
source is available. SL2 is used as the
input to tell the Master that the External
heatsourceisavailabletosupplyheatinto
thecascade.
Oncethisisdetermined,thecontrolsignalfor
theExternalheatsourcemustbedened.It
ispossibletoselectthe0-10Voutputorone
oftheMFRMulti-FunctionRelays,1to4.
.
Congure SL2
None
Ext. heat source release
Congure SL2
None
Ext. heat source release
OnceExt. heat sourcereleaseisselected
therequiredcontrolsignalcanbeselected
andcongured.
Ext. heat source control
None
PWM/0-10V ()
MFR1 ()
Ext. heat source control
None
PWM/0-10V ()
MFR1 ()
MFR2 ()
Ext. heat source control
PWM/0-10V ()
MFR1 ()
MFR2 ()
MFR3 ()
Ext. heat source control
MFR1 ()
MFR2 ()
MFR3 ()
MFR4 ()
Ext. heat source control
MFR2 ()
MFR3 ()
MFR4 ()
Ext. heat source control
MFR3 ()
MFR4 ()
0-10V Ext. heat source control settings.
Ifthe0-10Voutputisselectedtocontrolthe
demandtotheExternalheatsource,thenthe
followingparametersmustbeset.
ThevoltagethresholdtoturnontheExternal
heatsource.
Congure voltage demand
0.0V
Done
Congure voltage demand
1.5V
Done
Congure voltage off
0.0V
Done
Congure voltage off
1.0V
Done
External heat source capacity
Inordertobeabletodeterminethecapacity
ofthe cascade theMasterboilerneedsto
knowwhatthemaximumcapacityratingof
theExternalheatsourceis.
Maximum rating
35.0kW
Done
Maximum rating
80.0kW
Done
Thedemandswitchoncapacityfortheexternal
heatsourcecanthenbeset.
Switch on capacity
60%
Done
Switch on capacity
40%
Done
The next plant control signal that may be
conguredistheOpenThermBussignalwhich
isabidirectionalsignaltothecascade.
OpenTherm
Thisbussignalcanbothcontrolandmonitorthe
statusofthecascadeviatheMasterboiler.It
hasanumberofmodesofoperation:
1. On/Offdemand
2. Temperaturesetpointdemand
3. Capacity setpoint demand
IfnoOpenThermcontrolofthecascadeis
requiredthen‘None’maybeselected.
Congure OpenTherm
No
On demand
Temperature demand
The options that may be selected are as
below,if ‘On demand’ is selected this is
effectivelyaPELV‘voltsfree’enablesignal.
Congure OpenTherm
None
On demand
Temperature demand
Capacity demand
If ‘On demand’ is congured then this will
thenpromptforaCascadeowtemperature
setpoint,whichwillbethetargettemperature
for the cascade under direct OpenTherm
control.
OpenTherm Temp. Setpoint
60ºC
Done
OpenThermTemperaturedemand
Congure OpenTherm
On demand
Temperature demand
Capacity demand
WhenOpenThermTemperaturedemandis
selected,themaximumtemperaturethatan
OpenTherm master can demand from the
Plantcanbeadjusted.
Set max ow temp
80ºC
Done
Set max ow temp
85ºC
Done
Oncethislevelisset,‘Done’maybeselected.
Thenextplantfunctionthatmaybeselected
istheoutsidesensorinputifoneistobeused
forthecontroloftheowtemperaturefromthe
cascade.Ifnotthenselect‘Done’.
Outside sensor available?
None
Yes