OperatingGuide
TermixSolarA+/B+/S+
1.0TableofContents
1.0TableofContents.............................................1
........................................................................2
2.0Functionaldescription......................................3
3.0Safetynotes.....................................................4
3.1SafetyNotes–general............................................4
4.0Mounting........................................................5
4.1Mounting...........................................................5
4.2Electricalconnections.............................................7
5.0Design.............................................................8
5.1Design...............................................................8
5.2Schematicdiagram................................................9
5.3Design...............................................................10
5.4Schematicdiagram................................................11
6.0Controls..........................................................12
6.1DHWtemperaturecontrol........................................12
6.2Maintenance........................................................15
7.0Troubleshooting..............................................16
7.1Troubleshootingingeneral......................................16
7.2TroubleshootingDHW............................................17
7.3Disposal.............................................................18
8.0Declaration......................................................19
8.1Declarationofconformity........................................19
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2.0Functionaldescription
Domestichotwatermodulewithheatexchangerand
thermostaticcontrol.Designedforwall-mounting.
Application
TheT ermixSolarA+/B+/S+isaninstantaneouswaterheater,
featuringsuperbheatextractionandhighperformance.The
TermixSolarA+/B+/S+isapplicableforheatingsystemswithbuffer
accumulators,solarsystemsorforotherheatsources,whereavery
lowreturntemperatureispreferred.Thelargeheatexchanger
coolsoutthewaterintheprimaryreturnlineveryefficiently,
therebycreatingaverygoodoperationeconomy.Aflowswitchin
thedomestichotwaterpipeiscontrollingtheprimaryheating
pump.Anoptionalcirculationpumptogetherwithathermostat
canmaintainthecirculatingtemperatureatadesiredtemperature.
Domestichotwater(DHW)
Thedomestichotwaterispreparedintheheatexchangerandthe
temperatureisregulatedwithathermostaticcontrolvalve.There
isnoadditionalpressurelossonthesecondarysideoftheDHW
heatexchangerwithathermostaticcontrol.Thereforethistypeof
regulationcanbeusedbylowpressureinthecoldwatermains.
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3.0Safetynotes
3.1SafetyNotes–general
Thefollowinginstructionsrefertothestandarddesignof
substation.Specialversionsofsubstationsareavailableon
request.
Thisoperatingmanualshouldbereadcarefullybeforeinstallation
andstart-upofthesubstation.Themanufactureracceptsno
liabilityfordamageorfaultsthatresultfromnon-compliancewith
theoperatingmanual.Pleasereadandfollowalltheinstructions
carefullytopreventaccidents,injuryanddamagetoproperty.
Assembly,start-upandmaintenanceworkmustbeperformedby
qualifiedandauthorizedpersonnelonly.
Pleasecomplywiththeinstructionsissuedbythesystem
manufacturerorsystemoperator.
Corrosionprotection
Allpipesandcomponentsaremadeofstainlesssteelandbrass.
Themaximumchloridecompoundsoftheflowmediumshouldnot
behigherthan150mg/l.
Theriskofequipmentcorrosionincreasesconsiderablyifthe
recommendedlevelofpermissiblechloridecompoundsis
exceeded.
Energysource
Thesubstationisdesignedfordistrictheatingastheprimary
sourceofenergy.However,alsootherenergysourcescanbeused
wheretheoperatingconditionsallowitandalwaysarecomparable
todistrictheating.
Application
Thesubstationisdesignedtobeconnectedtothehouse
installationinafrost-freeroom,wherethetemperaturedoesnot
exceed50°Candthehumiditydoesnotexceed60%.Donotcover
orwallupthesubstationorinanyotherwayblocktheentrance
tothestation.
Authorizedpersonnelonly
Assembly,start-upandmaintenanceworkmustbeperformedby
qualifiedandauthorizedpersonnelonly.
Pleaseobserveinstructionscarefully
Toavoidinjurytopersonsanddamagetothedevice,itisabsolutely
necessarytoreadandobservetheseinstructionscarefully.
Warningofhighpressureandtemperature
Beawareoftheinstallation’spermissiblesystempressureand
temperature.
Themaximumtemperatureoftheflowmediuminthesubstationis
120°C.
Themaximumoperatingpressureofthesubstationis10bar.PN16
versionsareavailableonenquiry.
Theriskofpersonsbeinginjuredandequipmentdamagedincreases
considerablyiftherecommendedpermissibleoperatingparameters
areexceeded.
Thesubstationinstallationmustbeequippedwithsafetyvalves,
however,alwaysinaccordancewithlocalregulations.
Choiceofmaterial
Choiceofmaterialsalwaysincompliancewithlocallegislation.
Safetyvalve(s)
Werecommendmountingofsafetyvalve(s),however,alwaysin
compliancewithlocalregulations.
Connection
Thesubstationmustbeequippedwithfeaturesthatensurethat
thesubstationcanbeseparatedfromallenergysources(also
powersupply).
Emergency
Incaseofdangeroraccidents-fire,leaksorotherdangerous
circumstances-interruptallenergysourcestothestationif
possible,andseekexperthelp.
Incaseofdiscolouredorbad-smellingdomestichotwater,closeall
shut-offvalvesonthesubstation,informtheoperatingpersonnel
andcallforexperthelpimmediately.
REACH
AllDanfossA/SproductsfulfilltherequirementsinREACH.
OneoftheobligationsinREACHistoinformcustomersabout
presenceofCandidatelistsubstancesifany,weherebyinform
youaboutonesubstanceonthecandidatelist:Theproduct
containsbrasspartswhichcontainslead(CASno:7439-92-1)ina
concentrationabove0.1%w/w.
Storage
Anystorageofthesubstationwhichmaybenecessarypriorto
installationshouldbeinconditionswhicharedryandheated.
Warningofhotsurface
Thesubstationhasgothotsurfaces,whichcancauseskinburns.
Pleasebeextremelycautiousincloseproximitytothesubstation.
Powerfailurecanresultinthemotorvalvesbeingstuckinopen
position.Thesurfacesofthesubstationcangethot,whichcancause
skinburns.Theballvalvesondistrictheatingsupplyandreturnshould
beclosed.
Warningoftransportdamage
Beforesubstationinstallation,pleasemakesurethatthesubstation
hasnotbeendamagedduringtransport.
IMPORTANT-Tighteningofconnections
Duetovibrationsduringtransportallflangeconnections,screwjoints
andelectricalclampandscrewconnectionsmustbecheckedand
tightenedbeforewaterisaddedtothesystem.Afterwaterhasbeen
addedtothesystemandthesystemhasbeenputintooperation,
re-tightenALLconnections.
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4.0Mounting
4.1Mounting
Installationmustbeincompliancewithlocalstandardsand
regulations.
Districtheating(DH)-Inthefollowingsections,DHreferstothe
heatsourcewhichsuppliesthesubstations.Avarietyofenergy
sources,suchasoil,gasorsolarpower,couldbeusedasthe
primarysupplytoDanfosssubstations.Forthesakeofsimplicity,
DHcanbetakentomeantheprimarysupply.
Connections:
1.BufferTank(BT)supply
2.Domestichotwater(DHW)
3.BufferTank(BT)return
4.Domesticcoldwater(DCW)
5.Hotwatercirculation(HWC)-(Optional)
Authorizedpersonnelonly
Assembly,start-upandmaintenanceworkmustbeperformedby
qualifiedandauthorizedpersonnelonly.
Connectionsizes:
BT:
DCW+DHW+HWC:
Dimensions(mm):
Withoutcirculationandcover:
H655xW440xD138
Withoutcirculationandwithcover:
H715xW450xD150
Withcirculationandwithoutcover:
H940xW440xD138
Withcirculationandcover:
H940xW450xD150
Weight(approx.):
BrazedHEX(A+/S+):
GasketedHEX(B+):
G¾”(int.thread)
G¾”(int.thread)
14kg
17kg
Thepipeplacementcandeviatefromtheshowndrawing.Pleasenote
themarkingsonthestation.
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4.1.1Installation
Mounting:
Adequatespace
Pleaseallowadequatespacearoundthesubstationformounting
andmaintenancepurposes.
Orientation
Thestationmustbemountedsothatcomponents,keyholes
andlabelsareplacedcorrectly.Ifyouwishtomountthestation
differentlypleasecontactyoursupplier.
Drillings
Wheresubstationsaretobewall-mounted,drillingsareprovided
inthebackmountingplate.Floormountedunitshavesupport.
Labelling
Eachconnectiononthesubstationislabelled.
Beforeinstallation:
Cleanandrinse
Priortoinstallation,allsubstationpipesandconnectionsshouldbe
cleanedandrinsed.
Keyholeformounting.
Tightening
Duetovibrationduringtransport,allsubstationconnectionsmust
becheckedandtightenedbeforeinstallation.
Unusedconnections
Unusedconnectionsandshut-offvalvesmustbesealedwitha
plug.Shouldtheplugsrequireremoval,thismustonlybedoneby
anauthorizedservicetechnician.
Installation:
Strainer
Ifastrainerissuppliedwiththestationitmustbefittedaccording
toschematicdiagram.Pleasenotethatthestrainermaybe
suppliedloose.
Connections
Internalinstallationanddistrictheatingpipesconnectionsmustbe
madeusingthreaded,flangedorweldedconnections.
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4.2Electricalconnections
Beforemakingelectricalconnections,pleasenotethe
following:
Safetynotes
Pleasereadtherelevantpartsofthesafetynotes.
230V
Thesubstationmustbeconnectedto230VACandearth.
Potentialbonding
Potentialbondingshouldbecarriedoutaccording
to60364-4-41:2007andIEC60364-5-54:2011.
Bondingpointonthemountingplatebelowrightcornermarked
withearthsymbol.
Disconnection
Thesubstationmustbeelectricallyconnectedsothatitcanbe
disconnectedforrepairs.
Outdoortemperaturesensor
Outdoorsensorsshouldbemountedsoastoavoidexposureto
directsunlight.Theyshouldnotbeplacedclosetodoors,windows
orventilationoutlets.
Theoutdoorsensormustbeconnectedtothestationonthe
terminalblockundertheelectroniccontrol.
Authorizedelectrician
Electricalconnectionsmustbemadebyanauthorizedelectricianonly.
Localstandards
Electricalconnectionsmustbemadeinaccordancewithcurrent
regulationsandlocalstandards.
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5.0Design
5.1Design
5.1.1DesignTermixSolarA+/B+/S+
Yoursubstationmightlookdifferentthanthesubstationshown.
Designdescription
B
Heatexchanger,DHW
M
Electricalwiringbox
7
Thermostaticcontroller,DHW
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Chargingpump
21
Tobeorderedseparately
35
Ballvalve/non-returnvalve
45
Flowswitch
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5.2Schematicdiagram
5.2.1SchematicdiagramTermixSolarA+/B+/S+
BT
Supply
DHW
BT
Return
Yoursubstationmightlookdifferentthantheschematicdiagramshown.
Schematicdescriptionwithoutcirculation
B
Heatexchanger,DHW
M
Electricalwiringbox
1
Ballvalve
DHW:DomesticHotWater
DCW:
BTSupply:
BTReturn:
DomesticColdWater
Buffertanksupply
Buffertankreturn
1A
Ballvalve,DVGW
7
Thermostaticvalve
13
Chargingpump
21
Tobeorderedseparately
35
Ballvalve/non-returnvalve
45
Flowswitch
DCW
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5.3Design
5.3.1DesignTermixSolarA+/B+/S+withcirculation
Yoursubstationmightlookdifferentthanthesubstationshown.
Designdescription
B
Heatexchanger,DHW
M
Electricalwiringbox
2
Singlecheckvalve
4
Safetyvalve
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Thermostaticcontroller,DHW
11A
DHWpump,withbuiltincheckvalve
13
Chargingpump
21
Tobeorderedseparately
35
Ballvalve/non-returnvalve
45
Flowswitch
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5.4Schematicdiagram
5.4.1SchematicdiagramT ermixSolarA+/B+/S+withcirculation
BT
Supply
BT
Return
Yoursubstationmightlookdifferentthantheschematicdiagramshown.
Schematicdescriptionwithcirculation
B
Heatexchanger,DHW
M
Electricalwiringbox
1
Ballvalve
1A
Ballvalve,DVGW
DHW:DomesticHotWater
DCW:
HWC:
BTSupply:
BTReturn:
DomesticColdWater
HotWaterCirculation
Buffertanksupply
Buffertankreturn
2
Singlecheckvalve
4
Safetyvalve
7
Thermostaticvalve
11A
DHWpump,withbuiltincheckvalve
13
Chargingpump
21
Tobeorderedseparately
35
Ballvalve/non-returnvalve
45
Flowswitch
DHW
DCW
HWC
5.4.2Technicalparameters
Technicalparameters
Nominalpressure:
Max.DHsupplytemperature:
Min.DCWstaticpressure:
BrazedHEX(A+):
Brazingmaterial(HEX):
Heatexchangerstestpressure:30bar
GasketedHEX(B+):
Gasketmaterial(HEX):
Heatexchangerstestpressure:13bar
BrazedHEX(S+):
Brazingmaterial(HEX):Stainlesssteel
Heatexchangerstestpressure:24bar
Soundlevel:≤55dB
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PN10
120°C
0.5bar
Copper
EPDMper.
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6.0Controls
6.1DHWtemperaturecontrol
DHWtemperaturecontrol
TherearevarioustypesofDHWtemperaturecontrolusedin
Danfosssubstations.
DHWtemperatureshouldbeadjustedto45-50°C,asthisprovides
optimalutilisationofDHwater.AtDHWtemperaturesabove55°C,
thepossibilityoflimescaledepositsincreasessignificantly.
6.1.1AVTBcontroller(20–60°)
Thetemperaturesettingisasfollows:
1=20°C
2=35°C
3=50°C
4=60°C
5=70°C
Thevaluesareintendedasaguide.
TheAVTBoperatesatitsbestatDHsupplytemperaturesofupto
90°C.
Thermostaticcontrol
DHWtemperatureisadjustedasfollows:
Toincreasetemperature,turnthehandleonthethermostatic
controllertoselectahighernumber.
Todecreasetemperature,turnthehandleonthethermostatic
controllertoselectalowernumber.
6.1.2CirculatorpumpUPM3
UPM3Pumpscanbecontrolledinconstantpressure,proportional
pressureorconstantspeedmodedefinedbythemeansofasmart
userinterface.
Thevariablespeedmodulatingmodesallowthepumptomatchits
performancetothesystemrequirements,helpingtoreducenoise
whenthermostaticvalvesareclosingdown.
EnergylabellingclassA
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6.1.3GrundfosUPM3AUTOLinstructions
Controlmode
Youcanswitchfromtheperformanceviewtothesettingsviewbypressingthepushbutton.Thesettingsviewshowswhichmode
controlsthecirculator.After2seconds,thedisplayswitchesbacktoperformanceview.
Ifyoupressthebuttonfor2to10seconds,theuserinterfaceswitchesto"settingselection"iftheuserinterfaceisunlocked.Youcan
changethesettingsastheyappear.Theselectionofthecontrolmodedependsonthesystemtypeandtheallocationofpressurelosses.
Ifyoupressthekeylockformorethan10seconds,youcantogglebetweenenabling/disablingthekeylockfunction.
Function
Proportionalpressure1
Proportionalpressure2
Proportionalpressure3
Constantpressure1
Constantpressure2
Constantpressure3
ConstantCurve1
ConstantCurve2
ConstantCurve3
ConstantCurveMax.
Operationstatus
Function
Standby**OnlyPWMcontrolled
0%≤P1≤25%
25%≤P1≤50%
50%≤P1≤75%
75%≤P1≤100%
Recommendedfor
2-pipesystems
1-pipesystems
Underfloorheating
Green
✪✪
✪✪✪
✪✪✪✪
✪✪
✪✪✪
✪✪✪✪
✪✪✪
✪✪✪✪
✪✪✪✪✪
✪✪✪✪
Green
✪
✪✪
✪✪✪
✪✪✪✪
✪✪✪✪✪
YellowYellowYellowYellow
YellowYellowYellowYellow
Alarmstatus
Function
Blocked
Supplyvoltagelow
Electricalerror
RedYellowYellowYellowYellow
✪✪
✪✪
✪✪
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6.1.4Domestichotwaterpump
Thedomestichotwaterpumpcanbeprogrammedwiththe
desiredtimeprogramme.
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6.2Maintenance
Thesubstationrequireslittlemonitoring,apartfromroutine
checks.Itisrecommendedtoreadtheenergymeteratregular
intervals,andtowritedownthemeterreadings.
RegularinspectionsofthesubstationaccordingtothisInstruction
arerecommended,whichshouldinclude:
Strainers
Cleaningofstrainers.
Meters
Checkingofalloperatingparameterssuchasmeterreadings.
Temperatures
Checkingofalltemperatures,suchasDHsupplytemperatureand
DHWtemperature.
Connections
Checkingallconnectionsforleakages.
Safetyvalves
Theoperationofthesafetyvalvesshouldbecheckedbyturning
thevalveheadintheindicateddirection.
Venting
Checkingthatthesystemisthoroughlyvented.
Authorizedpersonnelonly
Assembly,start-upandmaintenanceworkmustbeperformedby
qualifiedandauthorizedpersonnelonly.
Inspectionsshouldbecarriedoutminimumeverytwoyears.
SparepartscanbeorderedfromDanfoss.Pleaseensurethatany
enquiryincludesthesubstationserialnumber.
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7.0Troubleshooting
7.1Troubleshootingingeneral
Intheeventofoperatingdisturbances,thefollowingbasicfeatures
shouldbecheckedbeforecarryingoutactualtroubleshooting:
•thesubstationisconnectedtoelectricity,
•thestrainerontheDHsupplypipeisclean,
•thesupplytemperatureoftheDHisatthenormallevel
(summer,atleast60°C-winter,atleast70°C),
•thedifferentialpressureisequaltoorhigherthanthenormal
(local)differentialpressureintheDHnetwork–ifindoubt,ask
theDHplantsupervisor,
•pressureonthesystem-checktheHEpressuregauge.
Authorizedpersonnelonly
Assembly,start-upandmaintenanceworkmustbeperformedby
qualifiedandauthorizedpersonnelonly.
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7.2TroubleshootingDHW
ProblemPossiblecauseSolution
ToolittleornoDHW.
Taptemperaturetoohigh;DHWtapload
toohigh.
Temperaturedropduringtapping.
Thermostaticcontrolvalvedoesnotclose
Strainerinsupplyorreturnlineclogged.Cleanstrainer(s).
DHWcirculationpumpoutoforderorwith
toolowsetting.
Defectiveorcloggednon-returnvalve.
Noelectricity.Check.
Wrongsettingofautomaticcontrols,ifany.Toadjustanelectroniccontrollerfor
Scalingoftheplateheatexchanger.
Defectivemotorizedvalve.Check(usemanualfunction)–replace.
Defectivetemperaturesensors.
Defectivecontroller.
DCWisbeingmixedwiththeDHW,e.g.ina
defectivethermostaticmixingvalve.
Defectiveorcloggednon-returnvalveon
circulationvalve.
Thermostaticvalveadjustedtoatoohigh
level.
Scalingoftheplateheatexchanger.
LargerDHWflowthanthesubstationhas
beendesignedfor.
TemperaturedifferencebetweenDH
supplyandDHWsetpointtoolow.
Checkcirculationpump.
Replace–clean.
DHW,pls.noteenclosedinstructionsfor
electroniccontroller.
Replace–rinseout.
Check–replace.
Check–replace.
Check–replace. Hotwaterinsometapsbutnotinall.
Replace–clean.
Check–set.
Replace–rinseout.
ReduceDHWflow.
Lowerthesetpointtemperatureorincrease
theDHsupplytemperature.
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7.3Disposal
Disposal
Thisproductshouldbedismantledanditscomponents
sorted,ifpossible,invariousgroupsbeforerecycling
ordisposal.
Alwaysfollowthelocaldisposalregulations.
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8.0Declaration
8.1Declarationofconformity
Category0withelectricalequipment
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