Danfoss Termix One-B Operating instructions

Brand: Danfoss

Model: Termix One-B

Type: Operating instructions

Danfoss Termix One-B is an instantaneous water heater that can be used to provide domestic hot water for flats, single-family houses as well as for small apartment buildings with up to 10 apartments. It is equipped with a heat exchanger and thermostatic control, and it can be used with district heating networks or decentralized heating systems. The device is designed to cool out district heating water very efficiently, resulting in good operation economy. The domestic hot water is prepared in the heat exchanger, and the temperature is regulated with a thermostatic control valve.

Operatingguide

TermixOne-B

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........................................................10

7.0Troubleshooting..............................................11

7.1Troubleshootingingeneral......................................11

7.2TroubleshootingDHW............................................11

7.3Disposal.............................................................12

8.0Declaration......................................................15

8.1Declarationofconformity........................................15

DanfossHeating

VI.CW.J4.02/LUK38000

DEN-GT

OperatingguideTermixOne-B

2.0Functionaldescription

Instantaneouswaterheaterwithheatexchangerand

thermostaticcontrol.Designedforwallmounting.

Application

TheTermixOneisaninstantaneouswaterheaterfeaturingsuperb

heatextractionandhighperformance.TheTermixOneissuitable

forats,single-familyhousesaswellasforsmallapartment

buildingswithupto10apartments.Thewaterheaterisavailablein

threesizes,eitherfor1apartment,for1‑4apartmentsorfor5up

to10apartments.TheTermixOneisapplicablefordecentralized

heatingsystems–aswellasfordistrictheatingnetworkswith

summeroperationatlowtemperaturesorchangesindifferential

pressure.TheTermixOneheatexchangercoolsoutthedistrict

heatingwaterveryefciently,therebycreatingaverygood

operationeconomy.

Domestichotwater(DHW)

Thedomestichotwaterispreparedintheheatexchangerand

thetemperatureisregulatedwithathermostaticcontrolvalve.

Thepatentedsensoracceleratoracceleratestheclosingofthe

DanfossAVTBvalveandprotectstheheatexchangeragainst

overheatingandlimescaleformation.Thesensoracceleratorand

AVTBvalvealsoworksasabypasskeepingthehousesupplyline

warm.Thisshortensthewaitingperiodsduringsummerwhenthe

heatingsystemisinreducedoperation.Thesensoraccelerator

helpstoensureastablehotwatertemperaturebyvaryingloads,

owtemperaturesanddifferentialpressurewithouttheneedfor

readjustingthevalve.Thereisnoadditionalpressurelossonthe

secondarysideoftheDHWheatexchangerwithathermostatic

control.Thereforethistypeofregulationcanbeusedbylow

pressureontheinthecoldwatermains.

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DanfossHeating

OperatingguideTermixOne-B

3.0Safetynotes

3.1SafetyNotes–general

Thefollowinginstructionsrefertothestandarddesignof

substation.Specialversionsofsubstationsareavailableon

request.

Thisoperatingmanualshouldbereadcarefullybeforeinstallation

andstart-upofthesubstation.Themanufactureracceptsno

liabilityfordamageorfaultsthatresultfromnon-compliancewith

theoperatingmanual.Pleasereadandfollowalltheinstructions

carefullytopreventaccidents,injuryanddamagetoproperty.

Assembly,start-upandmaintenanceworkmustbeperformedby

qualiedandauthorizedpersonnelonly.

Pleasecomplywiththeinstructionsissuedbythesystem

manufacturerorsystemoperator.

Corrosionprotection

Allpipesandcomponentsaremadeofstainlesssteelandbrass.

Themaximumchloridecompoundsoftheowmediumshouldnot

behigherthan150mg/l.

Theriskofequipmentcorrosionincreasesconsiderablyifthe

recommendedlevelofpermissiblechloridecompoundsis

exceeded.

Energysource

Thesubstationisdesignedfordistrictheatingastheprimary

sourceofenergy.However,alsootherenergysourcescanbeused

wheretheoperatingconditionsallowitandalwaysarecomparable

todistrictheating.

Application

Thesubstationisdesignedtobeconnectedtothehouse

installationinafrost-freeroom,wherethetemperaturedoesnot

exceed50°Candthehumiditydoesnotexceed60%.Donotcover

orwallupthesubstationorinanyotherwayblocktheentrance

tothestation.

Choiceofmaterial

Choiceofmaterialsalwaysincompliancewithlocallegislation.

Safetyvalve(s)

Werecommendmountingofsafetyvalve(s),however,alwaysin

compliancewithlocalregulations.

Connection

Thesubstationmustbeequippedwithfeaturesthatensurethat

thesubstationcanbeseparatedfromallenergysources(also

powersupply).

Emergency

Incaseofdangeroraccidents-re,leaksorotherdangerous

circumstances-interruptallenergysourcestothestationif

possible,andseekexperthelp.

Incaseofdiscolouredorbad-smellingdomestichotwater,closeall

shut-offvalvesonthesubstation,informtheoperatingpersonnel

andcallforexperthelpimmediately.

Storage

Anystorageofthesubstationwhichmaybenecessarypriorto

installationshouldbeinconditionswhicharedryandheated.

Authorizedpersonnelonly

Assembly,start-upandmaintenanceworkmustbeperformedby

qualiedandauthorizedpersonnelonly.

Pleaseobserveinstructionscarefully

Toavoidinjurytopersonsanddamagetothedevice,itisabsolutely

necessarytoreadandobservetheseinstructionscarefully.

Warningofhighpressureandtemperature

Beawareoftheinstallation’spermissiblesystempressureand

temperature.

Themaximumtemperatureoftheowmediuminthesubstationis

120°C.

Themaximumoperatingpressureofthesubstationis10bar.PN16

versionsareavailableonenquiry.

Theriskofpersonsbeinginjuredandequipmentdamagedincreases

considerablyiftherecommendedpermissibleoperatingparameters

areexceeded.

Thesubstationinstallationmustbeequippedwithsafetyvalves,

however,alwaysinaccordancewithlocalregulations.

Warningofhotsurface

Thesubstationhasgothotsurfaces,whichcancauseskinburns.

Pleasebeextremelycautiousincloseproximitytothesubstation.

Powerfailurecanresultinthemotorvalvesbeingstuckinopen

position.Thesurfacesofthesubstationcangethot,whichcancause

skinburns.Theballvalvesondistrictheatingsupplyandreturnshould

beclosed.

Warningoftransportdamage

Beforesubstationinstallation,pleasemakesurethatthesubstation

hasnotbeendamagedduringtransport.

IMPORTANT-Tighteningofconnections

Duetovibrationsduringtransportallangeconnections,screwjoints

andelectricalclampandscrewconnectionsmustbecheckedand

tightenedbeforewaterisaddedtothesystem.Afterwaterhasbeen

addedtothesystemandthesystemhasbeenputintooperation,

re-tightenALLconnections.

DanfossHeating

VI.CW.J4.02/LUK38000

DEN-GT

OperatingguideTermixOne-B

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:

DH:

G¾”(int.thread)

DCW+DHW:

G¾”(int.thread)

Dimensions(mm):

Type1+2withoutcover:

H428xW312xD155

Type1+2withcover:

H430xW315xD165

Type3withoutcover:

H468xW312xD155

Type3withcover:

H470xW315xD165

Weight(approx.):10–12kg

Authorizedpersonnelonly

Assembly,start-upandmaintenanceworkmustbeperformedby

qualiedandauthorizedpersonnelonly.

Thepipeplacementcandeviatefromtheshowndrawing.Pleasenote

themarkingsonthestation.

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VI.CW.J4.02/LUK38000

DanfossHeating

OperatingguideTermixOne-B

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.

Tightening

Duetovibrationduringtransport,allsubstationconnectionsmust

becheckedandtightenedbeforeinstallation.

Unusedconnections

Unusedconnectionsandshut-offvalvesmustbesealedwitha

plug.Shouldtheplugsrequireremoval,thismustonlybedoneby

anauthorizedservicetechnician.

Installation:

Strainer

Ifastrainerissuppliedwiththestationitmustbettedaccording

toschematicdiagram.Pleasenotethatthestrainermaybe

suppliedloose.

Connections

Internalinstallationanddistrictheatingpipesconnectionsmustbe

madeusingthreaded,angedorweldedconnections.

Keyholeformounting.

DanfossHeating

VI.CW.J4.02/LUK38000

DEN-GT

OperatingguideTermixOne-B

5.0Design

5.1Design

Yoursubstationmightlookdifferentthanthesubstationshown.

Designdescription

Heatexchanger,DHW

Termixsensoraccelerator

Thermostaticcontroller,DHW

DEN-GT

VI.CW.J4.02/LUK38000

DanfossHeating

OperatingguideTermixOne-B

5.2Schematicdiagram

Supply

DHW

Return

DCW

Supply

DHW

HWC

ReturnDCW

Yoursubstationmightlookdifferentthantheschematicdiagramshown.

Firstdiagram:TermixOne-B-withGTU.

Seconddiagram:TermixOne-B-withsafetyvalve.

Schematicdescription

Heatexchanger,DHW

Thermostaticvalve

Singlecheckvalve

Tobeorderedseparately

Safetyvalve

GTUPressureequalizer

Thermostatic/non-returnvalve

DHW:DomesticHotWater

DCW:

DomesticColdWater

HWC:

HotWaterCirculation

DHSupply:DistrictHeatingSupply

DHReturn:DistrictHeatingReturn

DanfossHeating

VI.CW.J4.02/LUK38000

DEN-GT

OperatingguideTermixOne-B

5.2.1Technicalparameters

Technicalparameters

Nominalpressure:

PN16

Max.DHsupplytemperature:

120°C

Min.DCWstaticpressure:

0.5bar

Brazingmaterial(HEX):

Copper

Heatexchangerstestpressure:30bar

Soundlevel:≤55dB

DEN-GT

VI.CW.J4.02/LUK38000

DanfossHeating

OperatingguideTermixOne-B

6.0Controls

6.1DHWtemperaturecontrol

DHWtemperaturecontrol

TherearevarioustypesofDHWtemperaturecontrolusedin

Danfosssubstations.

DHWtemperatureshouldbeadjustedto45-50°C,asthisprovides

optimalutilisationofDHwater.AtDHWtemperaturesabove55°C,

thepossibilityoflimescaledepositsincreasessignicantly.

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.

6.1.2Safetyvalve

Thepurposeofthesafetyvalveistoprotectthesubstationfrom

excessivepressure.

Theblow-offpipefromthesafetyvalvemustnotbeclosed.The

blow-offpipeoutletshouldbeplacedsothatitdischargesfreely

anditispossibletoobserveanydrippingfromthesafetyvalve.

Itisrecommendedtochecktheoperationofsafetyvalvesat

intervalsof6months.Thisisdonebyturningthevalveheadin

directionindicated.

DanfossHeating

VI.CW.J4.02/LUK38000

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OperatingguideTermixOne-B

6.1.3Strainer

Strainersshouldbecleanedregularlybyauthorizedpersonnel.The

frequencyofcleaningwoulddependonoperatingconditionsand

themanufacturer’sinstructions.

6.1.4GTUPressureEqualizer

TheGTUPressureEqualizerabsorbstheexpansiononthe

secondarysideoftheTermixwaterheatersandcanbeusedasa

substitutetothesafetyvalve.

Furthermorethepressureequalizerabsorbsapossibleincreasein

pressure,soadischargeoutletisomitted.

TheGTUPressureEqualizermaynotbeappliedinsystemswithhot

watercirculation.

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.

Inspectionsshouldbecarriedoutminimumeverytwoyears.

SparepartscanbeorderedfromDanfoss.Pleaseensurethatany

enquiryincludesthesubstationserialnumber.

Authorizedpersonnelonly

Assembly,start-upandmaintenanceworkmustbeperformedby

qualiedandauthorizedpersonnelonly.

DEN-GT

VI.CW.J4.02/LUK38000

DanfossHeating

OperatingguideTermixOne-B

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

qualiedandauthorizedpersonnelonly.

7.2TroubleshootingDHW

ProblemPossiblecauseSolution

Strainerinsupplyorreturnlineclogged.Cleanstrainer(s).

DHWcirculationpumpoutoforderorwith

toolowsetting.

Checkcirculationpump.

Defectiveorcloggednon-returnvalve.

Replace–clean.

Noelectricity.Check.

Wrongsettingofautomaticcontrols,ifany.Toadjustanelectroniccontrollerfor

DHW,pls.noteenclosedinstructionsfor

electroniccontroller.

Scalingoftheplateheatexchanger.

Replace–rinseout.

Defectivemotorizedvalve.Check(usemanualfunction)–replace.

Defectivetemperaturesensors.

Check–replace.

ToolittleornoDHW.

Defectivecontroller.

Check–replace.

DCWisbeingmixedwiththeDHW,e.g.in

adefectivethermostaticmixingvalve.

Check–replace. Hotwaterinsometapsbutnotinall.

Defectiveorcloggednon-returnvalveon

circulationvalve.

Replace–clean.

Taptemperaturetoohigh;DHWtapload

toohigh.

Thermostaticvalveadjustedtoatoohigh

level.

Check–set.

Scalingoftheplateheatexchanger.

Replace–rinseout. Temperaturedropduringtapping.

LargerDHWowthanthesubstationhas

beendesignedfor.

ReduceDHWow.

Thermostaticcontrolvalvedoesnotclose

TemperaturedifferencebetweenDH

supplyandDHWsetpointtoolow.

Lowerthesetpointtemperatureor

increasetheDHsupplytemperature.

DanfossHeating

VI.CW.J4.02/LUK38000

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OperatingguideTermixOne-B

7.3Disposal

Disposal

Thisproductshouldbedismantledanditscomponents

sorted,ifpossible,invariousgroupsbeforerecycling

ordisposal.

Alwaysfollowthelocaldisposalregulations.

DEN-GT

VI.CW.J4.02/LUK38000

DanfossHeating

OperatingguideTermixOne-B

DanfossHeating

VI.CW.J4.02/LUK38000

DEN-GT

OperatingguideTermixOne-B

DEN-GT

VI.CW.J4.02/LUK38000

DanfossHeating

OperatingguideTermixOne-B

8.0Declaration

8.1Declarationofconformity

Category0withoutelectricalequipment

DanfossHeating

VI.CW.J4.02/LUK38000

DEN-GT

OperatingguideTermixOne-B

Danfoss Termix One-B Operating instructions

Danfoss Termix One-B Operating instructions

Danfoss Termix One-B Operating instructions

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