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OperatingGuide
TermixNovi
1.0TableofContents
1.0TableofContents.............................................1
2.0Functionaldescription......................................2
3.0Safetynotes.....................................................3
3.1SafetyNotes–general............................................3
4.0Mounting........................................................4
4.1Mounting...........................................................4
5.0Design.............................................................6
5.1Design...............................................................6
5.2Schematicdiagram................................................7
6.0Controls..........................................................9
6.1DHWtemperaturecontrol........................................9
6.2Maintenance........................................................11
7.0Troubleshooting..............................................12
7.1Troubleshootingingeneral......................................12
7.2TroubleshootingDHW............................................13
7.3Disposal.............................................................14
8.0Declaration......................................................15
8.1Declarationofconformity........................................15
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2.0Functionaldescription
Instantaneouswaterheaterwithheatexchangerand
flowcompensatedtemperaturecontroller.Designedfor
wall-mounting.
Application
TheTermixWaterheaterisaninstantaneouswaterheaterfeaturing
superbheatextractionandhighperformance.TheTermixWater
heaterissuitableforflats,single-familyhousesaswellasforsmall
apartmentbuildings.Thewaterheaterisavailableintwosizes,
eitherfor1apartment,orupto4apartments.TheT ermixWater
heaterisapplicablefordecentralizedheatingsystems.Theheat
exchangerintheT ermixWaterheatercoolsthedistrictheating
waterveryefficiently,therebycreatingaverygoodoperation
economy.
Domestichotwater(DHW)
Thedomestichotwaterispreparedintheheatexchangerandthe
temperatureisregulatedbyaflowcontrollerwithaintegrated
differentialpressurecontroller.
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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.
Themaximumoperatingpressureofthesubstationis16bar.
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.Domesticcoldwater(DCW)
2.Domestichotwater(DHW)
3.Districtheating(DH)supply
4.Districtheating(DH)return
Connectionsizes:
Authorizedpersonnelonly
Assembly,start-upandmaintenanceworkmustbeperformedby
qualifiedandauthorizedpersonnelonly.
DH+DCW+DHW:
Dimensions(mm):
Type1+2withinsulation:
H432xW300xD155
Type1+2withcover:
H442xW315xD155
Weightincl.cover:7–9kg(incl.packing)
Cover:Greyfull-insulation
G¾”(ext.thread)
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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5.0Design
5.1Design
Yoursubstationmightlookdifferentthanthesubstationshown.
Designdescription
B
Heatexchanger,DHW
N
Circulationconnection
63
Sieve
74
IHPTcontroller,DHW
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5.2Schematicdiagram
DHW
DCW
DH
Supply
DH
Return
Yoursubstationmightlookdifferentthantheschematicdiagramshown.
SchematicdescriptionwithGTU
B
Heatexchanger,DHW
62
GTUPressureequalizer
DHW
HWC
DCW
DH
Supply
63
74
Sieve
IHPTcontroller
DH
Return
Yoursubstationmightlookdifferentthantheschematicdiagramshown.
Schematicdescriptionwithsafetyvalve
Heatexchanger,DHW
B
Singlecheckvalve
2
Singlecheckvalveincl.circulationpipe
2C
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21
Safetyvalve
Tobeorderedseparately
63
74
Sieve
IHPTcontroller
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DHW:DomesticHotWater
DCW:
HWC:
DHSupply:DistrictHeatingSupply
DHReturn:DistrictHeatingReturn
5.2.1Technicalparameters
Technicalparameters
DomesticColdWater
HotWaterCirculation
Nominalpressure:
Max.DHsupplytemperature:
Min.DCWstaticpressure:
Brazingmaterial(HEX):
Heatexchangerstestpressure:30bar
Soundlevel:≤55dB
PN16
120°C
1.0bar
Copper
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6.0Controls
6.1DHWtemperaturecontrol
DHWtemperaturecontrol
TherearevarioustypesofDHWtemperaturecontrolusedin
Danfosssubstations.
DHWtemperatureshouldbeadjustedto45-50°C,asthisprovides
optimalutilisationofDHwater.AtDHWtemperaturesabove55°C,
thepossibilityoflimescaledepositsincreasessignificantly.
6.1.1IHPT90controller(45–65°)
IHPTisaself-actingflow-compensatedtemperaturecontrollerwith
integrateddifferentialpressurecontroller.
TheIHPToperatesatitsbestatDHsupplytemperaturesofupto
100°C.
Byturningthehandlefortemperaturesettingin(+)direction
thesettingisincreased,byturningitin(-)directionthesettingis
decreased.
Turns*
0
1
2
3
4
5
6
7
*Startposition:Handleturnedfullyin(+)direction.
Thevaluesareintendedasaguide.
6.1.2Safetyvalve
Thepurposeofthesafetyvalveistoprotectthesubstationfrom
excessivepressure.
Theblow-offpipefromthesafetyvalvemustnotbeclosed.The
blow-offpipeoutletshouldbeplacedsothatitdischargesfreely
anditispossibletoobserveanydrippingfromthesafetyvalve.
Itisrecommendedtochecktheoperationofsafetyvalvesat
intervalsof6months.Thisisdonebyturningthevalveheadin
directionindicated.
Scale
7
661
5
455
352
248
144
043
DHWT emperatureSetting[°C]
64
58
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6.1.3Strainer
Strainersshouldbecleanedregularlybyauthorizedpersonnel.The
frequencyofcleaningwoulddependonoperatingconditionsand
themanufacturer’sinstructions.
6.1.4GTUPressureEqualizer
TheGTUPressureEqualizerabsorbstheexpansiononthe
secondarysideoftheTermixwaterheatersandcanbeusedasa
substitutetothesafetyvalve.
Furthermorethepressureequalizerabsorbsapossibleincreasein
pressure,soadischargeoutletisomitted.
TheGTUPressureEqualizermaynotbeappliedinsystemswithhot
watercirculation.
6.1.5Circulationpipe
Thecirculationpipesetismounteddirectlyonthecontroller.
Thesetincludescirculationpipe,singlecheckvalveandfitting.
Whenmountingthehotwatercirculationdirectlyonthecontroller
thehotwatercirculationtemperaturewillbeequaltotheidle
temperature.Theidletemperatureisafewdegreeslowerthanthe
setdomestichotwatertemperature.
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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
Idletemperaturetoolow(forstations
equippedwithIHPT).
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.
Setpointtoolow.Turnthermostatin(+)direction.
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
Category0withoutelectricalequipment
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