Tech Controllers ST-976 User manual

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TABLE OF CONTENTS  
 Safety...........................................................................................................................................................5
 Devicedescription.......................................................................................................................................6
 Installation...................................................................................................................................................7
 Howtousethecontroller............................................................................................................................9
 Principleofoperation.........................................................................................................................10
4.1.1 Lambdasensor...........................................................................................................................10
 Workingphasesofthecontroller......................................................................................................10
4.2.1 Fire‐up........................................................................................................................................10
4.2.2 Standardoperation....................................................................................................................10
4.2.3 Automaticoperation..................................................................................................................10
4.2.4 PIDoperationalgorithm.............................................................................................................11
4.2.5 Damping.....................................................................................................................................11
 Controllerfunctions‐mainmenu.....................................................................................................12
4.3.1 Fire‐up/Damping......................................................................................................................13
4.3.2 Fueltankfull...............................................................................................................................13
4.3.3 Temperaturesettings.................................................................................................................13
4.3.4 Workalgorithm..........................................................................................................................14
4.3.5 Manualmode.............................................................................................................................16
4.3.6 Weeklycontrol...........................................................................................................................16
4.3.7 Operationmodes.......................................................................................................................19
4.3.8 Fuelselection.............................................................................................................................20
4.3.9 Thermaldisinfection..................................................................................................................21
4.3.10 Screensettings...........................................................................................................................21
4.3.11 Fitter’smenu..............................................................................................................................22
4.3.12 Servicemenu..............................................................................................................................22
4.3.13 Timesettings..............................................................................................................................22
4.3.14 Languageselection.....................................................................................................................23
4.3.15 Softwareversion........................................................................................................................23
4.3.16 Factorysettings..........................................................................................................................23
 Controllerfunctions–fitter’smenu..................................................................................................24
4.4.1 Operationalgorithmselection...................................................................................................25
4.4.2 Fire‐upparameters....................................................................................................................25
4.4.3 Dampingparameters.................................................................................................................26
4.4.4 Internalfeedercoefficient.........................................................................................................26
4.4.5 Exhaustfan.................................................................................................................................26
4.4.6 Bufferparameters......................................................................................................................27

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4.4.7 Valvesettings.............................................................................................................................27
4.4.8 Additionaloutput1,2................................................................................................................34
4.4.9 Roomregulator..........................................................................................................................37
4.4.10 Fuellevelcalibration..................................................................................................................38
4.4.11 Cleaning......................................................................................................................................39
4.4.12 Ecomode....................................................................................................................................39
4.4.13 Alarmhistory..............................................................................................................................41
4.4.14 ModułGSM................................................................................................................................41
4.4.15 Ethernetmodule........................................................................................................................42
4.4.16 Factorysettings..........................................................................................................................43
 Protections................................................................................................................................................44
 Thermalprotectionofthechboiler...................................................................................................44
 Automaticsensorcontrol...................................................................................................................44
 Thermalprotectionofthechboiler(STB).........................................................................................44
 Fuse....................................................................................................................................................44
 Alarms.......................................................................................................................................................45
 Technicaldata............................................................................................................................................46
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5
SAFETY
Beforeusingthedeviceforthefirsttimetheusershouldreadthefollowingregulations
carefully.Notobeyingtherulesincludedinthismanualmayleadtopersonalinjuriesorcontrollerdamage.
Theuser’smanualshouldbestoredinasafeplaceforfurtherreference.Inordertoavoidaccidentsand
errorsitshouldbeensuredthateverypersonusingthedevicehasfamiliarizedthemselveswiththeprinciple
ofoperationaswellassecurityfunctionsofthecontroller.Ifthedeviceistobesoldorputinadifferent
place,makesurethattheuser’smanualistherewiththedevicesothatanypotentialuserhasaccessto
essentialinformationaboutthedevice.
The manufacturer does not accept responsibility for any injuries or damage resulting from negligence;
therefore,usersareobligedtotakethenecessarysafetymeasureslistedinthismanualtoprotecttheirlives
andproperty.
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WARNING
 Highvoltage!Makesuretheregulatorisdisconnectedfromthemainsbeforeperformingany
activitiesinvolvingthepowersupply(pluggingcables,installingthedeviceetc.)
 Thedeviceshouldbeinstalledbyaqualifiedelectrician.
 Beforestartingthecontroller,theusershoudmeasureearthingresistanceoftheelectric
motorsaswellastheinsulationresistanceofthecables.
 Theregulatorshouldnotbeoperatedbychildren.
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WARNING
 Thedevicemaybedamagedifstruckbyalightning.Makesuretheplugisdisconnectedfrom
thepowersupplyduringstorm.
 Anyuseotherthanspecifiedbythemanufacturerisforbidden.
 Beforeandduringtheheatingseason,thecontrollershouldbecheckedforconditionofits
cables.Theusershouldalsocheckifthecontrollerisproperlymountedandcleanitifdusty
ordirty.
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Changesinthemerchandisedescribedinthemanualmayhavebeenintroducedsubsequenttoitscompletion
on February 13th 2018. The manufacturer retains the right to introduce changes to the structure. The
illustrationsmayincludeadditionalequipment.Printtechnologymayresultindifferencesincoloursshown.
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We are committed to protecting the environment. Manufacturing electronic
devicesimposesanobligationofproviding for environmentally safe disposal of
used electronic components and devices. Hence, we have been entered into a
registerkeptbytheInspectionForEnvironmentalProtection.Thecrossed‐outbin
symbolonaproductmeansthattheproductmaynotbedisposedoftohousehold
wastecontainers.Recyclingofwasteshelpstoprotecttheenvironment.Theuser
isobligedtotransfertheirusedequipmenttoacollectionpointwhereallelectric
andelectroniccomponentswillberecycled.

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DEVICEDESCRIPTION
ST-976 controllerisintendedforcontrollingpellet‐firedCHboilerswithafeeder,andasupply
airfan.Duetoadvancedsoftware,thecontrolleroffersarangeoffunctions:
 Controlofanigniter
 Controlofafeeder
 Controlofaburner‐cleaninggrate
 Controlofasupplyairfan
 Controlofanexhaustfan(afterconnectinganadditionalST‐63module)
 Controlofcentralheatingpump‐CH
 Controlofdomestichotwaterpump‐DHW
 Smoothcontrolofamixingvalve
 Controlofadditionalpumps(max.2)withthepossibilityofchoosingthetypeofdevice(CHpump,
DHWpump,circulatingpump,floorpump,alarm)
 Built‐inmodulecontrollingthevalve
 Weather‐basedcontrolofthevalve
 Weeklycontrol
 Cooperationwitharoomregulatorusingtraditional(two‐state)orRScommunication
 Manualburningoptionwithautomatictransition
 Possibilityofmonitoringtheleveloffuelinthetank
 SoftwareupdateviaUSB
 Dockingstationenablingbothfixedandwirelessuse
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 PossibilityofconnectingST‐65GSMmodule,whichenablestheusertocontrolcertainfunctionsviaa
mobilephone
 PossibilityofconnectingST‐505Ethernetmodule,whichenablestheusertoviewcertainparameters
andcontrolcertainfunctionsviatheInternet
 Possibilityofconnectingamodulecontrollinglambdasensor
 Possibilityofconnectingtwoadditionalvalve‐controllingmodules(e.g.ST‐61orST‐431N)
 Buffercontrol
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7
INSTALLATION
Thecontrollershouldbeinstalledbyaqualifiedperson.
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WARNING
Riskoffatalelectricshockfromtouchingliveconnections.Beforeworkingonthecontrollerswitch
offthepowersupplyandpreventitfrombeingaccidentallyswitchedon.
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Exampleinstallationschemes:
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1. CHpump
2. DHWpump
3. Additionalpump1
4. Valve
5. Additionalpump2
6. Externalfeeder
7. Thermalprotection
8. Roomregulator
9. Fluegassensor
10. CHsensor
11. DHWsensor
12. Valvesensor
13. Returnsensor
14. Externalsensor
15. Additionalsensor1
16. Additionalsensor2
17. Feedersensor
18. Firesensor
19. Feeder
20. Blow
21. Ignite
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9
HOWTOUSETHECONTROLLER
Thedeviceisoperatedbymeansofatouchscreen,inthebottom part of which there are
navigationicons.Themainscreenisdividedintotwoareaswhichmaybeadjustedtoindividual
user’sneedsusingthearrows.Theusermaychooseoneofthefollowingscreenviews:CHboilertemperature,
CH boiler temperature chart, Water tank temperature, Water tank temperature chart, Fire‐up/Damping
function,Fuellevel,Parametersofbuilt‐invalve.
Theupperleft‐handsideofthescreendisplayscurrentcontrolleroperationmode‐touchthescreenhereto
changetheoperationmode.Theright‐handsideofthescreendisplayscurrentdayoftheweekandtime‐
touchheretoedittimesettings.
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Inordertochangeparameters,usethesliderorthearrowsasillustratedbelow.
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Increasevalue
taponceorhold
Decreasevalue
taponceorhold
Slider
right–increase
left‐decrease

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10
PRINCIPLEOFOPERATION
Theregulatorcontrolsthefanandthefeederwiththeaimofreachingthepre‐settemperaturevalueofwater
tankandCHboiler.Additionally,itcontrolsCHpumpandDHWpump,enablingthemafterthepre‐definedCH
boilertemperaturehasbeenreached.
Dependingonthesettings,thecontrollermayoperateaccordingtostandardalgorithm,automaticalgorithm
orzPIDalgorithm.ItmayalsouseLambdasensor.Themenulayoutmayalsodifferdependingonsettings.
4.1.1 Lambdasensor
Additionally,thecontrolleroperationmaydependonLAMBDAsensorreadings,whichprovidetheinformation
abouttheproportionofoxygeninthefluegas.Onthebasisofthisvalue,theefficiencyoftheburningprocess
isassessed.Iftheamountofoxygenisdifferentthanthepre‐setvalue,theregulatoradjuststhefanspeedas
wellastheamountoffuelfedtotheboiler,inordertomaketheprocessmoreefficient.
WORKINGPHASESOFTHECONTROLLER
ParametersofparticularworkingphasesoftheCHboilerareconfiguredbytheuser.Fire‐upanddampingare
multi‐stageprocessesdescribedbelow.TheremainingphasesdependontheOperationalgorithmselectedby
theuser.
4.2.1 Fire‐up
Thisphaseisinitializedbytheuserinthemainmenu,orbythecontrollersoftwareincertainsituations(e.g.
after periodical cleaning of the furnace during controller operation). There are four stages of the fire‐up
process:
1. Blow‐by
Inthisstagethefanworksatfullspeedinordertocleanthefurnace.
2. Initialfuelfeeding
Inthisstagetheblowforcedecreasestoitsminimumvalue‐1%. The feeder is enabled and operates
throughoutthewholestage.Fuelfeedingtimeissetbytheuserintheservicemenu.
3. Heater
Inthefollowingstageofthefire‐upprocesstheheaterisenabled.Itremainsactiveuntilthesensordetects
flames.Thefeederisinactivewhereasthefanoperatesatthespeeddefinedbythefitterinthefitter’smenu.
4. Stabilization
Delayisthefinalstageofthefire‐upprocess.Itstartswhentheflameshavebeendetected.Duringthisstage
thefirestabilizes.Thefeederoperatesaccordingtooperationtimeandpausetimesettings.Thefanoperates
atthespeeddefinedintheservicemenu.
4.2.2 Standardoperation
The feeder and fanoperation depend on the user’ssettings and currentCHboilertemperature.If current
temperatureismuchlowerthanthepre‐setvalue(e.g.afterthefire‐up),thefeederandthefanoperate
accordingtothesettingsdescribedasMaximumpower.WhentheCHboilerapproachesthepre‐setvalue,the
controllerswitchestoMinimumpowersettings.
4.2.3 Automaticoperation
Once the fire‐up process has been completed, the controller enters automatic mode. In this mode, the
controlleroperationisbasedontheuser‐definedparametersconcerningtheweightandcalorificvalueoffuel
andfanspeedbeforeandafterreachingthepre‐settemperaturevalue.



11
4.2.4 PIDoperationalgorithm
IfPIDcontrolfunctionisactive,thefanandfeederoperationdependoncurrentCHboilertemperatureand
thefluegastemperature.
Thistypeofcontrollercalculatestheblowforceonthebasisof CH boiler temperature and the flue gas
temperaturemeasuredattheCHboileroutlet.Thefanoperatescontinuouslyandtheblowforcedependson
theCHboilertemperature,thefluegastemperatureaswellasthedifferencebetweentheseparametersand
theirpre‐setvalues.OneofthegreatestadvantagesofPIDregulatorsistheirabilitytomaintainastablepre‐
settemperaturewithoutunnecessaryoverregulationandoscillations.
Usingthistypeofregulatorwithafluegassensorhelpstoreducefuelcostsbyuptoseveralpercent.
Moreover,itensuresstabletemperatureofoutputwaterthusprolongingthelifeoftheheatexchanger(of
theCHboiler).Fluegastemperaturecontrolattheoutletresultsinlowemissionofdustandenvironmentally
harmfulgases.Fluegasheatisnotdisposedofthroughthechimney,butitisutilisedforheatingpurposes.

Testresults:TECHcontrollerwithPIDcontrol
Testresults:TECHcontrollerwithoutPIDcontrol
4.2.5 Damping
Itmaybeactivatedbytheuserinthemainmenuorbythesoftwareincertaincircumstances(e.g.before
automaticcleaningprocedure,afterasuddentemperatureincreaseof5⁰Corafterflamelossinoperation
mode).
Dampingisatwo‐stageprocess.Thedurationofthesestagesmaybeadjustedinthefitter’smenu.
1. Dampingprotection
Thefeederisdisabledandthefanoperatesatthespeeddefinedbythefitterinthefitter’smenu.Thisphase
lastsuntilthesensordetectsflameloss.
2. Dampingdelay
Thefanoperatesatfullspeed.


12
CONTROLLERFUNCTIONS‐MAINMENU
Inthemainmenutheusermayconfigurebasiccontrolleroptions:

Page
MAINMENU

Fire‐up/Damping 12
Fueltankfull 13
Temperaturesettings 13
Standard/automatic/zPID 14
Manualmode 16
Weeklycontrol 16
Operationmodes 19
Fuelselection 20
Thermaldisinfection 21
Screensettings 21
Fitter’smenu 22
Servicemenu 22
Timesettings 22
Languageselection 23
Softwareversion 23
Factorysettings 23







13
4.3.1 Fire‐up/Damping
Oncethisfunctionhasbeenselected,thefire‐upprocessstarts.
Theuserisaskedtoconfirmthefire‐upprocessactivation.
Thenextstagesoffire‐upprocessaredescribedinsection:
 Błąd!Niemożnaodnaleźćźródłaodwołania.Fire‐up,page:
10
Itisadependentfeature‐itdependsontheoperationmode.Fire‐
upfunctionisdifferentoperationmodesisdescribedinthefollowingsection:
 4.4.12Ecomode,page:39
Oncethefire‐upprocesshasbeenactivatedinthecontrollermenu,thisoptionchangesintoDamping,which
enablestheusertostartCHboilerdampingprocess.
4.3.2 Fueltankfull
Thisfunctionshouldbeusedafterthefueltankhasbeenfullyfilled,inordertoresetthefuellevelto100%.
NOTE
Beforeusingthisfunctionforthefirsttimeitisnecessarytocalibratethefuelfeederoperation.
 4.4.10Fuellevelcalibration,page:38
4.3.3 Temperaturesettings
MAINMENU


TEMPERATURESETTINGS


Pre‐setCHtemperature
Pre‐setDHWtemperature
CHboilerhysteresis
DHWhysteresis
Pumpswitchontemperature
Pre‐setroomtemperature*
*Whenroomregulatorisconnected,withRScommunication
 Afterselectingagivenicon,thedisplayshowsapanelenablingtheusertochangethesettingusinga
sliderorarrows.
Pre‐setCHtemperature
Thisoptionisusedtodefinethepre‐settemperatureoftheCHboiler.Thesettingrangeavailableis55°C‐80°C
(thesettingrangemaybechangedbythemanufacturerorfitterintheservicemenu).
Pre‐setDHWtemperature
Thisfunctionisusedtodefinethepre‐settemperatureofthedomesticwater.After thewaterin thetank
reachesthis temperature,DHWpump isdisabled. Thepump will beenabled againwhen thetemperature
dropsbelowthepre‐settemperatureminusthevalueofDHWhysteresis(readfromtheDHWsensor).DHW
temperaturerange:40°C‐60°C.


14
CHboilerhysteresis
Thisoptionisusedtosetthehysteresisofthepre‐settemperature. It is the difference between the
temperatureofenteringthesustainmodeandthetemperatureofrestoringoperationmode.

Example:




When the pre‐set temperature is 60 ºC, the hysteresis is 3ºC, the device will be disabled at the
temperatureof60ºCwhereasreturningtotheoperationmodetakesplaceat57ºC.
DHWhysteresis
Thisoptionisusedtosetthehysteresisofthepre‐setwatertanktemperature.Itisthedifferencebetween
the pre‐set temperature (desired temperature of the water tank) and the temperature of returning to
operationmode.
Example:




Whenthepre‐settemperatureis55ºC,thehysteresisis5ºC,thedeviceisdisabledwhenthepre‐set
temperatureof55ºCisreached.Itisactivatedagainwhenthetemperaturedropsto50ºC.
Pumpswitchontemperature
ThisoptionisusedtodefinethetemperatureofCHpumpandDHWpumpactivation(temperaturemeasured
ontheCHboiler).Belowthistemperaturevaluebothpumpsremaininactivewhereasabovethisvaluethe
pumpsareenabledandoperateaccordingtotheoperationmode.
4.3.4 Workalgorithm
Standardoperation
MAIN
MENU


STANDARD
OPERATION


Minimumpower
Maximumpower

 DecideifyouwanttoadjuststandardoperationparametersforMaximumpowerorMinimumpower
 Tapontheiconoftheparametertobeeditedanddefinetheparametervaluesusingasliderorarrows.
Thisoptionenablestheusertoconfigureoperationtime,frequencyoffeederactivationandblowforcefora
givenpowerlevel.
IfthecontrollercooperateswithLambdasensor,theusermayalsoconfigurethepre‐setamountofoxygenin
fluegasforeachpowerlevel.Then,thefeederandfanoperationwillalsobecontrolledonthebasisofLambda
sensorreadings.
Pre‐setCHtemperature 60°C
Hysteresis 3°C
Enteringsustainmode 60°C
Returntooperationmode 57°C
Pre‐setDHWtemperature 55°C
Hysteresis 5°C
Pumpdeactivation 55°C
Pumpactivation 50°C



15
Automaticoperation
MAINMENU


AUTOMATICOPERATION


Weighingfuel2minutes
Fuelweight
Calorificvalue
Fanmax.
Fanmin.

Weighingfuel2minutes
Thisfunction enables the usertocheck the weight ofthe fuel fed by the feeder within 2minutes. Before
activating this function, it is necessary to disconnect the feeder from the burner and provide a suitable
container.Next,waituntilthefeedingprocessfinishesandweighthefuel.
Fuelweight
Entertheweightofthefuelfedwithin2minutes.
Calorificvalue
Enterthecalorificvalueofpelletfuel(givenonthepackaging).
Fanmax.
Thisoptionisusedtodefinethefanspeeduntilthepre‐settemperatureisreached.
Fanmin.
This option is used to define the fan speed in sustain mode, i.e.afterthepre‐settemperaturehasbeen
reached.
zPIDoperation
MAIN
MENU


zPID


Feedercoefficient
Fancoefficient

Feedercoefficient
Feedercoefficientservestooptimizethefeederoperationsothatitsuppliesanappropriateamountoffuel.
UsingthisfunctiontheusermayincreaseordecreasetheamountoffuelfedtotheCHboiler.
Fancoefficient
Thisfunctionisusedtoadjustthefanspeed.Iftheblowforce is too low/high, the coefficient should be
adequatelyincreased/decreasedinordertoensureefficiency.



16
4.3.5 Manualmode
MAINMENU


MANUALMODE


Igniter
Blow
Blowforce
Feeder
Internalfeeder
CHpump
DHWpump
Additionaloutput*
Valve1**
Valve2**
Built‐invalve
*Thisparameterisdisplayedafteractivatingtheadditionaldeviceinthefitter’smenu.
**Theseparametersaredisplayedafteractivatingtheadditionalvalveinthefitter’smenu(itisnecessarytousean
additionalvalve‐controllingmodulee.g.ST‐431N).

Fortheuser'sconvenience,theregulatoroffersManualmodefunction.Inthisfunction,eachexecutivedevice
maybeactivatedanddeactivatedindependentlyofothers.Itallowstheusertocheckifthefollowingdevices
workcorrectly:igniter,blow(fan),feeder,grate,CHpump,DHWpump,additionalpumps,built‐invalveand
optionallytheadditionalvalves(thismodemayactivatevalveopeningandclosing)andvalvepumps.Blow
forcefunctionenablestheusertoadjustthefanspeed.
NOTE
Whentheuserenablestheigniter,theblowfunctionisenabledaswell.
4.3.6 Weeklycontrol
MAINMENU


WEEKLY
CONTROL


CHboileroperationschedule
CHboilerweeklycontrol
DHWoperationschedule

ThisfunctionenablestheusertoconfigureweeklycontroloftheCHboilerandthewatertankaswellas
programthechangesofCHboilerpre‐settemperatures.
NOTE
Itisnecessarytosettimeanddateforthisoptiontofunctionproperly.



17
CHboileroperationschedule
Oncethisoptionhasbeenselected,thedisplaysshowsiconsindicatingdaysoftheweek.Selectagivendayto
adjusttheoperationscheduletoindividualneeds.
ThistypeofweeklycontrolenablestheusertoconfiguretheperiodsofCHboileroperationonparticulardays
oftheweek,withtheaccuracyof30minutes.Duringtheperiodsofinactivity,theCHboilerremainsdamped
regardlessofotherfactors(e.g.signalfromtheroomregulator).

WEEKLYCONTROLSETTING –  CH BOILEROPERATION SCHEDULE
HowtoconfigureCHboileroperationschedule:
 Activatethisoption.
 Selectthedayoftheweektobeedited.
 Thedisplayshowsthefollowingcontent:



 First,usetheicons  toselectthetimeperiodinwhichyouwanttoenableordisablethe
CHboiler.
 Oncethehourhasbeenselected,usetheicon toenableordisabletheCHboileratagiven
time.
 Inordertosavethesettingforanothertimeperiod,tapontheicon .Whenitishighlightedin
red ,usetheicons  tocopythesettingintothenextortheprevioustimeperiod.
 Oncetheoperationscheduleforeachdayhasbeenconfigured,select .
 Thedisplayshowsapanelenablingtheusertocopythesettingintoanotherdayoftheweek.
 IfyouwanttheCHboilertooperateaccordingtothesesettingonotherdaysoftheweek,select
thesedaysandtap .



 Inordertoresetallsettings,tapon andconfirm.
CHboilerweeklycontrol
Weekly control function enables the user to program changes of the pre‐set CH boiler temperature for
particularhoursanddaysoftheweek.Thesettingrangeforthetemperaturedifferencesis+/‐10⁰C.
Inordertoactivatethisfunction,selectMode1orMode2.Detailedsettingsofeachmodeareavailablefurther
inthesubmenu:Setmode1andSetmode2.
Onceagivenmodeisselected,themainscreendisplaysthevalueofcurrenttemperaturedeviation(below
thepre‐setCHtemperature,alternatelywithPre‐set)informingtheuserthatthefunctionisactive.
 H
OWTOSETWEEKLYCONTROL 
Weeklycontrolmaybeprogrammedintwodifferentmodes:


18
MODE1–theusersetsthetemperaturedeviationsforeachdayoftheweekseparately
Configuringmode1:
 Select:Setmode1.
 Selectthedayoftheweektobeedited
 Thefollowingscreenappearsonthedisplay



 Use  toselectthehourtobeedited
 Use  toincreaseordecreasethecorrespondingtemperaturevalueasneeded
 Therangeofpre‐settemperaturechangeis‐10°Cto10°C.
 Ifyouwanttocopythetemperaturechangevalueforthenexthours,tapon ‐itwillbe
highlightedinred: Then,use  tocopythesettingsintothepreviousorthefollowing
hour.
 Oncealltemperaturechangesforagivendayareready,select.
 Thedisplayshowsascreenenablingtheusertocopythesettingsforthenextday.
 IfyouwanttheCHboilertooperateaccordingtothesesettingsalsoonotherdaysoftheweek,
selectthemandconfirmbytappingon .



 Allsettingsmaybedeletedbyselecting andconfirmingit.
Example:


HourTemperature‐weeklycontrol
setting(+/‐)
Monday
PRE‐SET
400‐7
00 +5°C
700‐14
00 ‐10°C
1700‐22
00 +7°C

 Ifthepre‐setCHboilertemperatureis50°C,onMondaysbetween400and700theCHboilerwillincreaseby5°C
toreach55°C;between700and1400itwilldropby10°C,toreach40°C,andbetween1700and2200itwillincreaseto
reach57°C.



19
MODE2– theusersets thetemperature deviationsforallworking days(Monday‐Friday) andforthe
weekend(Saturday‐Sunday)separately.
Configuringmode2:
 Select:Setmode2.
 Selectthepartoftheweektobeedited.
 FollowthesameprocedureasinthecaseofMode1.
Example:


HourTemperature‐weeklycontrol
setting(+/‐)
Monday‐ Friday
PRE‐SET
400‐7
00 +5°C
700‐14
00 ‐10°C
1700‐22
00 +7°C
Saturday‐ Sunday
PRE‐SET600‐9
00 +5°C
1700‐22
00 +7°C

 If the pre‐set CH boiler temperature is 50°C, from Monday to Fridaybetween4
00
and700theCHboilerwillincreaseby5°Ctoreach55°C;between700and1400itwilldropby10°C,toreach40°C,and
between1700and2200itwillincreasetoreach57°C.
 Ththeweekend,between600and900thetemperaturewillincreaseby5°Ctoreach55°C,andbetween1700and
2200itwillincreasetoreach57°C.
DHWoperationschedule
ThisfunctionenablestheusertoconfiguretheperiodsofDHWtankactivityonparticulardaysoftheweek,
withtheaccuracyof30minutes.
 4.3.6.1CHboilerschedule,page:17
4.3.7 Operationmodes
MAINMENU


OPERATION
MODES


Househeating
Watertankpriority
Parallelpumps
Summermode
Inthisfunctiontheuseractivatesoneoftheoperationmode,sdependingoncurrentneeds.
Househeating
Whenthisfunctionisselected,onlythehouseisheated.CHpumpisactivatedwhenthetemperatureisabove
thepumpactivationthreshold.Belowthistemperaturevalue(minushysteresis)thepumpisdisabled.


20
Watertankpriority
Inthismode,thewatertank(DHW)pumpoperatesuntilthepre‐setDHWtemperatureisreached(thevalves
closetothemaximumandthevalvepumpsareswitchedoff).Afterthepre‐settemperaturehasbeenreached,
thepumpisdisabledandthecontrolleractivatestheCHpumpandthemixingvalves.Whenthewatertank
temperaturedropsbelowthepre‐setvalueminushysteresis,DHWpumpisenabledagainandthevalvesare
disabled.
NOTE
Ifthepre‐setwatertanktemperatureishigherthanthepre‐setCHboilertemperature,thepumpwill
notbeactivatedinordernottocooldownthewater.
Parallelpumps
InthismodetheCHpumpoperatesabovethepumpactivationthreshold.DHWpumpisactivatedatthesame
time in order to heat the water tank. Once DHW pre‐set temperature has been reached, DHW pump is
disabled.ItisenabledagainwhenthetemperaturedropsbyDHWhysteresisvalue.
NOTE
IfcurrentCHboilertemperatureislowerthancurrentwatertanktemperature,DHWpumpwillnotbe
activatedtopreventthewaterinthetankfromcoolingdown.
Summermode
InthismodeonlyDHWpumpisactive(enabledwhenthepumpswitch‐onthresholdisreached)andtheCH
valvesareclosedinordernottoheatthehouseunnecessarily.IftheCHboilertemperatureistoohigh(when
returnprotectionfunctionisenabled),thevalvewillbeopeninanemergencyprocedure.
4.3.8 Fuelselection
MAIN
MENU


FUEL
SELECTION

Pellet
Wood
Automatictransition
Thisfunctionisusedtoselectthetypeoffuelused‐pelletorwood.Dependingonuser’schoice,certain
factorysettingschange.
Automatictransition
Thisfunctioninvolvesautomaticfuelchange.IftheCHboilerisfiredwithwood,oncethewoodhasbeenburnt
up,itispossibletochangethefueltypeintopelletwithoutthenecessityofusingFire‐upfunction.Whenthe
CHboilerisinoperationmodeandCHsensordetectsthatthetemperatureislowerthanthepre‐setthreshold,
thecontrollerwillemptythegrateandstartpelletfireup,afterthetimedefinedinWaitingtimefunction.





