Danfoss Vmtd-f-b User Manual

OperatingGuide
TermixVMTD-F-B

1.0TableofContents

1.0TableofContents.............................................1
........................................................................2
2.0Functionaldescription......................................3
3.0Safetynotes.....................................................4
3.1SafetyNotes–general............................................4
4.0Mounting........................................................5
4.2Start-up..............................................................6
4.3Electricalconnections.............................................7
5.0Design.............................................................8
5.1Design...............................................................8
6.0Controls..........................................................10
6.1Heatingcircuit......................................................10
6.2DHWtemperaturecontrol........................................11
6.3Other.................................................................11
6.4Maintenance........................................................14
7.0Troubleshooting..............................................15
7.1Troubleshootingingeneral......................................15
7.2TroubleshootingDHW............................................15
7.3TroubleshootingHE...............................................16
7.4Disposal.............................................................17
8.0Declaration......................................................18
8.1Declarationofconformity........................................18
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2.0Functionaldescription

Districtheatingsubstationfordirectheatingand instantaneousdomestichotwater .
Application
TheTermixVMTD-F-Bisacompletesolutionwithbuilt-inwater heaterandadifferentialpressurecontrolledheatingsystem.Termix VMTD-F-Bisapplicableforsingleandmulti-familyhousesandfor decentralizedsystems.
Districtheating(DH)
Thesubstationisprefabricatedwithadifferentialpressure controller,attingpieceandsensorpocketsforinsertionofaheat meteraswellasstrainerandballvalves.
Heating(HE)
Theheatingcircuitisdesignedfordirectgenerationofheat. Thedifferentialpressurecontrolsetstheoptimumoperation conditionsforradiatorthermostaticvalvesinordertoenable individualtemperaturecontrolineachroom.Inordertoenablea time-dependingtemperaturecontrolprogram,azonevalvewith actuatorandaroomthermostatcanbeincludedasanoption.
Domestichotwater(DHW)
Thedomestichotwaterispreparedintheheatexchangerandthe temperatureisregulatedwithathermostaticcontrolvalve.The patentedsensoracceleratoracceleratestheclosingoftheDanfoss AVTBvalveandprotectstheheatexchangeragainstoverheating andlimescaleformation.TheheatexchangercoolstheDHwater veryefciently,therebycreatingaverygoodoperatingeconomy. ThesensoracceleratorandAVTBvalvealsoworksasabypass keepingthehousesupplylinewarm.Thisshortensthewaiting periodsduringsummerwhentheheatingsystemisinreduced operation.Thesensoracceleratorhelpstoensureastablehot watertemperatureregardlessofvaryingloads,owtemperatures anddifferentialpressurewithouttheneedforreadjustingthevalve.
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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 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.
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.
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.
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.
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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.Hotwatercirculation(HWC)(Optional)
2.Districtheating(DH)supply
3.Districtheating(DH)return
4.Coldwatermains(CWM)
5.Domesticcoldwater(DCW)
6.Domestichotwater(DHW)
7.Heating(HE)supply
8.Heating(HE)return
Authorizedpersonnelonly
Assembly,start-upandmaintenanceworkmustbeperformedby qualiedandauthorizedpersonnelonly.
Thepipeplacementcandeviatefromtheshowndrawing.Pleasenote themarkingsonthestation.
Connectionsizes:
DH+HE: CWM+DCW+DHW:
G¾”(int.thread) G¾”(int.thread)
Dimensions(mm):
Withoutcover: H710xW528xD150 Withcover(mountonwallvariant): H800xW540xD190 Withcover(built-inwallvariant): H915–980xW610xD150
Weight(approx.):20kg
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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
Ifastrainerissuppliedwiththestationitmustbettedaccording toschematicdiagram.Pleasenotethatthestrainermaybe suppliedloose.
Connections
Internalinstallationanddistrictheatingpipesconnectionsmustbe madeusingthreaded,angedorweldedconnections.

4.2Start-up

Start-up,Directheating
Theshut-offvalvesshouldbeopenedandtheunitobservedas itentersservice.Visualcheckingshouldconrmtemperatures, pressures,acceptablethermalexpansionandabsenceofleakage. Iftheheatexchangeroperatesinaccordancewithdesign,itcanbe puttoregularuse.
Re-thightenconnections
Afterwaterhasbeenaddedtothesystemandthesystemhasbeen putintooperation,re-tightenALLconnections.
Afterwaterhasbeenaddedtothesystemandthesystemhasbeen putintooperation,re-tightenALLconnections.
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4.3Electricalconnections

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

Yoursubstationmightlookdifferentthanthesubstationshown.
Designdescription
B
Heatexchanger,DHW
O
Termixsensoraccelerator
7
Thermostaticvalve,DHW
9
Strainer41BFittingpiece,energymeter
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Sensorpocket,energymeter
31
Differentialpressurecontroller
41A
Fittingpiece,coldwatermains
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5.2Schematicdiagram

DHW
CWM
DCW
DH
Supply
DH
Return
Yoursubstationmightlookdifferentthantheschematicdiagramshown.
Schematicdescription
B
Heatexchanger,DHW
7
Thermostaticvalve,DHW
9
Strainer41BFittingpiece,energymeter
14
Sensorpocket,energymeter
31
Differentialpressurecontroller
41A
Fittingpiece,coldwatermains
DHW:DomesticHotWater CWM: DCW:
ColdWaterMains DomesticColdWater
DHSupply:DistrictHeatingSupply DHReturn:DistrictHeatingReturn HESupply:HeatingSupply HEReturn:HeatingReturn
HE Supply
HE Return
5.2.1Technicalparameters
Technicalparameters
Nominalpressure:PN10(PN16versionsareavailableonenquiry) Max.DHsupplytemperature: Min.DCWstaticpressure: Brazingmaterial(HEX):
120°C
0.5bar
Copper Heatexchangerstestpressure:30bar Soundlevel:≤55dB
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6.0Controls

6.1Heatingcircuit

6.1.1Differentialpressurecontroller
Thedifferentialpressurecontrollersmoothsouttheuctuationsin pressurearrivingfromthedistrictheatingnetwork.Theoperating pressureinthesubstationisthusheldsteady.
6.1.2TP7000
TP7000electronic7dayprogrammableroomthermostat. Signalsfromtheroomthermostatcanbeusedtocontrolzone valves.
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6.2DHWtemperaturecontrol

DHWtemperaturecontrol
TherearevarioustypesofDHWtemperaturecontrolusedin Danfosssubstations. DHWtemperatureshouldbeadjustedto45-50°C,asthisprovides optimalutilisationofDHwater.AtDHWtemperaturesabove55°C, thepossibilityoflimescaledepositsincreasessignicantly.
6.2.1AVTBcontroller(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.

6.3Other

6.3.1Safetyvalve
Thepurposeofthesafetyvalveistoprotectthesubstationfrom excessivepressure. Theblow-offpipefromthesafetyvalvemustnotbeclosed.The blow-offpipeoutletshouldbeplacedsothatitdischargesfreely anditispossibletoobserveanydrippingfromthesafetyvalve. Itisrecommendedtochecktheoperationofsafetyvalvesat intervalsof6months.Thisisdonebyturningthevalveheadin directionindicated.
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6.3.2Strainer
Strainersshouldbecleanedregularlybyauthorizedpersonnel.The frequencyofcleaningwoulddependonoperatingconditionsand themanufacturer’sinstructions.
6.3.3GTUPressureEqualizer
TheGTUPressureEqualizerabsorbstheexpansiononthe secondarysideoftheTermixwaterheatersandcanbeusedasa substitutetothesafetyvalve. Furthermorethepressureequalizerabsorbsapossibleincreasein pressure,soadischargeoutletisomitted. TheGTUPressureEqualizermaynotbeappliedinsystemswithhot watercirculation.
6.3.4ReturntemperaturelimiterFJVR(10-80°C)
ThereturnlimitertypeFJVRautomaticallycontrolsthereturn temperaturefromradiators,convectorsandunderoorheating pipes.
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6.3.5Fittingpiece
Thesubstationisequippedwithattingpieceforenergymeter.
Assemblyofenergymeters:
1:Closeballvalves
ClosetheballvalvesonDHSupplyandDHReturn,ifthereiswater onthesystem.
2:Loosennuts
Loosenthenutsonthettingpiece.
3:Removettingpiece
Removethettingpieceandreplaceitwiththeenergymeter.Do notforgetthegaskets.
4:Tightenconnections
Aftermountingoftheenergymeterremembertocheckand tightenallthreadedconnections.
Sensorpocket,energymeter
Thesensorsoftheenergymeterismountedinthesensorpockets.
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6.4Maintenance

Thesubstationrequireslittlemonitoring,apartfromroutine checks.Itisrecommendedtoreadtheenergymeteratregular intervals,andtowritedownthemeterreadings.
RegularinspectionsofthesubstationaccordingtothisInstruction arerecommended,whichshouldinclude:
Strainers
Cleaningofstrainers.
Meters
Checkingofalloperatingparameterssuchasmeterreadings.
Temperatures
Checkingofalltemperatures,suchasDHsupplytemperatureand DHWtemperature.
Connections
Checkingallconnectionsforleakages.
Safetyvalves
Theoperationofthesafetyvalvesshouldbecheckedbyturning thevalveheadintheindicateddirection.
Authorizedpersonnelonly
Assembly,start-upandmaintenanceworkmustbeperformedby qualiedandauthorizedpersonnelonly.
Venting
Checkingthatthesystemisthoroughlyvented.
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.

7.2TroubleshootingDHW

Authorizedpersonnelonly
Assembly,start-upandmaintenanceworkmustbeperformedby qualiedandauthorizedpersonnelonly.
ProblemPossiblecauseSolution
ToolittleornoDHW.
Strainerinsupplyorreturnlineclogged.Cleanstrainer(s).
DHWcirculationpumpoutoforderorwith toolowsetting.
Defectiveorcloggednon-returnvalve.
Noelectricity.Check.
Wrongsettingofautomaticcontrols,ifany.Toadjustanelectroniccontrollerfor
Scalingoftheplateheatexchanger.
Defectivemotorizedvalve.Check(usemanualfunction)–replace.
Defectivetemperaturesensors.
Defectivecontroller.
DCWisbeingmixedwiththeDHW,e.g.in adefectivethermostaticmixingvalve.
Defectiveorcloggednon-returnvalveon circulationvalve.
Taptemperaturetoohigh;DHWtapload toohigh.
Thermostaticvalveadjustedtoatoohigh level.
Scalingoftheplateheatexchanger.
LargerDHWowthanthesubstationhas beendesignedfor.
Thermostaticcontrolvalvedoesnotclose
TemperaturedifferencebetweenDH supplyandDHWsetpointtoolow.
Checkcirculationpump.
Replace–clean.
DHW,pls.noteenclosedinstructionsfor electroniccontroller.
Replace–rinseout.
Check–replace.
Check–replace.
Check–replace. Hotwaterinsometapsbutnotinall.
Replace–clean.
Check–set.
Replace–rinseout. Temperaturedropduringtapping.
ReduceDHWow.
Lowerthesetpointtemperatureor increasetheDHsupplytemperature.
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7.3TroubleshootingHE

ProblemPossiblecauseSolution
Toolittleornoheat.StrainercloggedinDHorHEcircuit
(radiatorcircuit).
ThelterintheenergymeteronDHcircuit clogged.
Defectiveorwronglyadjusteddifferential pressurecontroller.
Sensordefective–orpossiblydirtinthe valvehousing.
Automaticcontrols,ifany,wronglysetor defective-possiblypowerfailure.
Pumpoutofoperation.Checkifthepumpisreceivingpowerand
Thepumpissetattoolowspeedof rotation.
Pressuredrop–thepressuredropon theradiatorcircuitshowslowerthan recommendedoperatingpressure.
Airpocketsinthesystem.Venttheinstallationthoroughly.
Limitingofthereturntemperature adjustedtoolow.
Defectiveradiatorvalves.
Unevenheatdistributioninbuilding becauseofincorrectlysetbalancingvalves, orbecausetherearenobalancingvalves.
Diameterofpipetosubstationtoosmallor branchpipetoolong.
Unevenheatdistribution.Airpocketsinthesystem.Venttheinstallationthoroughly.
DHsupplytemperaturetoohigh.
Wrongsettingofthermostatorof automaticcontrols,ifany.
Defectivecontroller.Thecontrollerdoes notreactasitshouldaccordingtothe instructions.
Defectivesensoronself-actingthermostat.
DHsupplytemperaturetoolow.
Wrongsettingofautomaticcontrols,ifany.
Defectivecontroller.Thecontrollerdoes notreactasitshouldaccordingtothe instructions.
Defectivesensoronself-actingthermostat.
Wrongplacement/ttingofoutdoor temperaturesensor.
Strainerclogged.Cleangate/strainer.
Cleangate/strainer(s).
Cleanthelter(afterconsultingtheDH plantoperator).
Checktheoperationofthedifferential pressurecontroller–cleanthevalveseatif required.
Checktheoperationofthethermostat– cleanthevalveseatifrequired.
Checkifthesettingofthecontroller iscorrect–seeseparateinstructions. Checkthepowersupply.Temporary settingofmotorto“manual”control–see instructionsonautomaticcontrols.
thatitturns.Checkifthereisairtrappedin thepumphousing–seepumpmanual.
Setthepumpathigherspeedofrotation.
Fillwateronthesystemandcheckthe functioningofthepressureexpansion vesselifrequired.
Adjustaccordingtoinstructions.
Check–replace.
Adjust/installbalancingvalves.
Checkpipedimensions.
Adjustautomaticcontrols,–see instructionsforautomaticcontrols.
Callautomaticcontrolsmanufactureror replacetheregulator.
Replacethermostat–orsensoronly.
Adjustautomaticcontrols–seeinstructions forautomaticcontrols.
Callinautomaticcontrolsmanufactureror replacecontroller.
Replacethermostat–orsensoronly.
Adjustlocationofoutdoortemperature sensor.
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ToohighDHreturntemperature.
Noiseinsystem.
Heatloadtoohigh.
Toosmallheatingsurface/toosmall
Increasetotalheatingsurface. radiatorscomparedtothetotalheating requirementofthebuilding.
Poorutilizationofexistingheatingsurface. Defectivesensoronself-actingthermostat.
Makesuretheheatisdistributedevenly
acrossthefullheatingsurface–openall
radiatorsandkeeptheradiatorsinthe
systemfromheatingupatthebottom.It
isextremelyimportanttokeepthesupply
temperaturetotheradiatorsaslowas
possible,whilemaintainingareasonable
levelofcomfort.
Thesystemissinglepipeloop.
Thesystemshouldfeatureelectronic
controlsaswellasreturnsensors.
Pumppressuretoohigh.Adjustpumptoalowerlevel.
Airinsystem.
Defectiveorincorrectlysetradiator
Ventthesystem.
Check–set/replace. valve(s).Singlepipeloopsystemsrequire specialone-piperadiatorvalves.
Dirtinthemotorizedvalveorinthe
Check–cleanout. differentialpressurecontroller.
Defectivemotorizedvalve,sensoror
Check–replace. automaticcontroller.
Electroniccontrollernotadjustedcorrectly.Adjustaccordingtoinstructions.
Pumppressuretoohigh.Adjustpumptoalowerlevel.
Defectivemotorizedvalve,sensoror
Check–replace. electroniccontroller.

7.4Disposal

Disposal
Thisproductshouldbedismantledanditscomponents sorted,ifpossible,invariousgroupsbeforerecycling ordisposal.
Alwaysfollowthelocaldisposalregulations.
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8.0Declaration

8.1Declarationofconformity

Category0withoutelectricalequipment
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Category0withelectricalequipment
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ProducedbyDanfossA/S©11/2016
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