Danfoss VMTD-I Operating guide
OperatingGuide
TermixVMTD-Iwithcompleteinsulation
1.0TableofContents
1.0TableofContents.............................................1
........................................................................2
2.0VMTD-IinsuIHPTFunctionaldescription...........3
3.0Safetynotes.....................................................4
3.1SafetyNotes–general............................................4
4.0Mounting........................................................5
4.1Mounting...........................................................5
4.2Start-up..............................................................7
5.0Design.............................................................8
5.1Design...............................................................8
5.2Schematicdiagram................................................9
6.0Controls..........................................................10
6.1Heatingcircuit......................................................10
6.2DHWtemperaturecontrol........................................11
6.3Other.................................................................12
6.4Extras................................................................14
6.5Mountingplateforenergymeterdisplay.....................15
6.6Maintenance........................................................16
7.0Troubleshooting..............................................17
7.1Troubleshootingingeneral......................................17
7.2TroubleshootingDHW............................................18
7.3TroubleshootingHE...............................................19
7.4Disposal.............................................................21
8.0Declaration......................................................22
8.1Declarationofconformity........................................22
©Danfoss|2019.05VM.IE.C3.02/LUK40143|1
OperatingGuideT ermixVMTD-Iwithcompleteinsulation
2|©Danfoss|2019.05
VM.IE.C3.02/LUK40143
OperatingGuideT ermixVMTD-Iwithcompleteinsulation
2.0VMTD-IinsuIHPTFunctionaldescription
Districtheatingsubstationfordirectheatingand
instantaneousdomestichotwaterwithflow-compensated
temperaturecontroller .Designedforwall-mounting.
Application
TheTermixVMTD-Iisacompletesolutionwithbuilt-inwaterheater
andadifferentialpressurecontrolledheatingsystem.Termix
VMTD-Iisapplicableforsinglefamilyhousesandfordecentralized
systems.
Districtheating(DH)
Thesubstationisprefabricatedwithadifferentialpressure
controller,afittingpieceandsensorpocketsforinsertionofan
energymeteraswellasstrainer.Thedisplayoftheenergymeteris
tobemountedonabracketunderneaththesubstation.
Heating(HE)
Theheatingcircuitisdesignedfordirectgenerationofheat.
Thedifferentialpressurecontrolsetstheoptimumoperation
conditionsforradiatorthermostaticvalvesinordertoenable
individualtemperaturecontrolineachroom.Inordertoenablea
time-dependingtemperaturecontrolprogram,azonevalvewith
actuatorisincluded,andaroomthermostatcanbeincludedas
anoption.
Domestichotwater(DHW)
Thedomestichotwaterispreparedintheheatexchangerandthe
temperatureisregulatedwithaflowcompensatedtemperature
controllerwithintegrateddifferentialpressurecontroller.Theheat
exchanger-whichisinsulated-coolstheDHwaterveryefficiently,
therebycreatinganexcellentoperatingeconomy.TheIHPTvalve
ensuresastablehotwatertemperaturebyvaryingloads,supply
temperaturesandbyhighandvaryingdifferentialpressurewithout
theneedforreadjustingthevalve.Thisprotectstheheatexchanger
againstoverheatingandlimescaleformation.Furthermorethe
IHPTvalvehasanintegratedidletemperaturecontroller,which
keepsthehousesupplylinewarm.Thisshortensthewaiting
periodsduringsummerwhentheheatingsystemisinreduced
operation,whichisidealwherehighcomfortisrequested.AWRAS
approvednon-returnvalveisfittedinthecoldwatersupply.
VM.IE.C3.02/LUK40143
©Danfoss|2019.05|3
OperatingGuideT ermixVMTD-Iwithcompleteinsulation
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.
4|©Danfoss|2019.05
VM.IE.C3.02/LUK40143
OperatingGuideT ermixVMTD-Iwithcompleteinsulation
4.0Mounting
4.1Mounting
Installationmustbeincompliancewithlocalstandardsand
regulations.
Districtheating(DH)-Inthefollowingsections,DHreferstothe
heatsourcewhichsuppliesthesubstations.Avarietyofenergy
sources,suchasoil,gasorsolarpower,couldbeusedasthe
primarysupplytoDanfosssubstations.Forthesakeofsimplicity,
DHcanbetakentomeantheprimarysupply.
Connections:
1.Districtheating(DH)supply
2.Districtheating(DH)return
3.Heating(HE)supply
4.Heating(HE)return
5.Domestichotwater(DHW)
6.Domesticcoldwater(DCW)
Authorizedpersonnelonly
Assembly,start-upandmaintenanceworkmustbeperformedby
qualifiedandauthorizedpersonnelonly.
Connectionsizes:
DH+HE:
DCW+DHW:
Dimensions(mm):
Withinsulation:
H610xW540xD345
Weight(approx.):15kg
Thepipeplacementcandeviatefromtheshowndrawing.Pleasenote
themarkingsonthestation.
G¾”(int.thread)
G¾”(int.thread)
VM.IE.C3.02/LUK40143
©Danfoss|2019.05|5
OperatingGuideT ermixVMTD-Iwithcompleteinsulation
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.
6|©Danfoss|2019.05
VM.IE.C3.02/LUK40143
OperatingGuideT ermixVMTD-Iwithcompleteinsulation
4.2Start-up
Start-up,Directheating
Theshut-offvalvesshouldbeopenedandtheunitobservedas
itentersservice.Visualcheckingshouldconfirmtemperatures,
pressures,acceptablethermalexpansionandabsenceofleakage.
Iftheheatexchangeroperatesinaccordancewithdesign,itcanbe
puttoregularuse.
Afterwaterhasbeenaddedtothesystemandthesystemhasbeen
putintooperation,re-tightenALLconnections.
Re-thightenconnections
Afterwaterhasbeenaddedtothesystemandthesystemhasbeen
putintooperation,re-tightenALLconnections.
VM.IE.C3.02/LUK40143
©Danfoss|2019.05|7
OperatingGuideT ermixVMTD-Iwithcompleteinsulation
5.0Design
5.1Design
Yoursubstationmightlookdifferentthanthesubstationshown.
Designdescription
B
Heatexchanger,DHW
N
Circulationconnection
9
Strainer
14
Sensorpocket,energymeter
8|©Danfoss|2019.05
31
Differentialpressurecontroller
41
Fittingpiece,energymeter
63
Sieve
74
IHPTcontroller,DHW
VM.IE.C3.02/LUK40143
Loading...