Danfoss VMTD MIX Compact 28 Operating guide

OperatingGuide
TermixVMTDMIXCompact28

1.0TableofContents

1.0TableofContents.............................................1
2.0Functionaldescription......................................2
3.0Safetynotes.....................................................3
3.1SafetyNotes–general............................................3
4.0Mounting........................................................4
4.1Mounting...........................................................4
4.3Electricalconnections.............................................7
5.0Design.............................................................8
5.1Design...............................................................8
5.2Schematicdiagram................................................9
6.0Controls..........................................................10
6.1Heatingcircuit......................................................10
6.2DHWtemperaturecontrol........................................13
6.3Other.................................................................15
6.4Maintenance........................................................16
7.0Troubleshooting..............................................17
7.1Troubleshootingingeneral......................................17
7.2TroubleshootingDHW............................................18
7.3TroubleshootingHE...............................................19
7.4Disposal.............................................................21
8.0Declaration......................................................23
8.1Declarationofconformity........................................23
©Danfoss|2019.01VI.CW.Y5.02/LUK42260|1
OperatingGuideTermixVMTDMIXCompact28

2.0Functionaldescription

Districtheatingsubstationfordirectheatingand instantaneousdomestichotwaterwiththermostaticor electroniccontrols.Designedforwall-mounting.
Application
TheTermixVMTDCompact28isacompletesolutionwitha built-inwaterheaterandaheatingcircuitwithmixingloop.The substationistheperfectsolutionforapartmentbuildingswithup to25apartments.
Districtheating(DH)
Thedistrictheatingcircuitisprefabricatedwithaflowcontroller withintegratedcontrolvalveaswellasstrainersandballvalves. Furthermorethesubstationisdeliveredwithamixingloop,which includespumpandnon-returnvalve.
Heating(HE)
Theheatingcircuitisdesignedfordirectconnection.Theflow controllerwithintegratedcontrolvalvesetstheoptimumoperation conditionsforradiatorthermostatsinordertoenableindividual temperaturecontrolineachroom.nThemixingloopcreatesa suitabletemperaturelevelfortheheatingsystem.
Domestichotwater(DHW)
Thedomestichotwaterispreparedintheplateheatexchanger andthetemperatureisregulatedwiththermostaticorelectronic controls.Theefficientheatexchangeroffersexceptionallygood heatextractionwithhighoutput.NoreadjustmentoftheDHW temperatureisrequiredafterinstallationandinitialsettingofthe controls.Thethermostaticcontrolvalveautomaticallyretainsthe comforttemperatureofthehotwater,evenwhentheheating systemisinreducedoperationduringsummerorifthedistrict heatingplantchangesoperatingparametersbetweensummerand winter.Thiseitherbyloweringorincreasingtheflowtemperature ofthedistrictheatingwaterand/ortheoperatingpressureinthe network.
2|©Danfoss|2019.01
VI.CW.Y5.02/LUK42260
OperatingGuideTermixVMTDMIXCompact28

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.
VI.CW.Y5.02/LUK42260
©Danfoss|2019.01|3
OperatingGuideTermixVMTDMIXCompact28

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)
7.Hotwatercirculation(HWC)
Authorizedpersonnelonly
Assembly,start-upandmaintenanceworkmustbeperformedby qualifiedandauthorizedpersonnelonly.
Connectionsizes:
DH+HE: DCW+DHW: HWC:
Dimensions(mm):
Withoutcover: H970xW750xD470 Withcover: H970xW800xD522
Weight(approx.):55kg
Thepipeplacementcandeviatefromtheshowndrawing.Pleasenote themarkingsonthestation.
G1”(int.thread) G1”(int.thread) G¾”(int.thread)
4|©Danfoss|2019.01
VI.CW.Y5.02/LUK42260
OperatingGuideTermixVMTDMIXCompact28
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.
VI.CW.Y5.02/LUK42260
©Danfoss|2019.01|5
OperatingGuideTermixVMTDMIXCompact28

4.2Start-up

Start-up,Heatingwithmixingloop
Start-up:
1:Pumpspeed
Setthepumptohighestspeedbeforestart-up.
2:Startpump
Startthepumpandheatthroughthesystem.
3:Openshut-offvalves
Theshut-offvalvesshouldthenbeopenedandtheunitobserved asitentersservice.Visualcheckingshouldconfirmtemperatures, pressures,acceptablethermalexpansionandabsenceofleakage. Ifthesystemoperatesinaccordancewithdesign,itcanbeput toregularuse.
4:Ventsystem
Switchoffthepumpandventtheinstallationaftertheradiators havebeenwarmedup.
5:Adjustpumpspeed
Setthepumptothelowestspeedconsistentwithcomfortand electricityconsumption. Normallythechange-overswitchissetinthemidposition(default). Howeverforsystemswithunderfloorheatingorsinglepipeloop systems,itmaybenecessarytoturnthechange-overswitch upwards. Higherpumpspeedsareonlyusediftheheatingrequirement increases.
Re-thightenconnections
Afterwaterhasbeenaddedtothesystemandthesystemhasbeen putintooperation,re-tightenALLconnections.
Pump
Thepumpmustbeswitchedoffduringsystemfill.
Underfloorheating:
Pumpstopfunction
Ifthesubstationisusedinconnectionwithunderfloorheating,the circulationpumpmustbeconnectedtothepumpstopfunctionin theunderfloorheatingcontroller.Thepumpmustbestoppedif allunderfloorheatingcircuitsareclosed.
Warranty
Ifthisisnotpossible,thenflowmustbecontinuedthroughthe by-pass.Failingthis,thepumpwillbeatriskofseizureandany remainingwarrantywillbewithdrawn.
Summeroperation:
Switchoffpump
Insummerthecirculationpumpmustbeswitchedoffandthe shut-offvalvetoHEsupplyclosed.
Runningpumpbi-weekly
Itisrecommendedtostartupthecirculationpump(for2minutes) onceamonthduringsummer;theshut-offvalveoftheHEsupply mustbeshut.
Electroniccontroller
Mostelectroniccontrollerswillstartupthepumpautomatically (pleasenotemanufacturer´sinstructions).
6|©Danfoss|2019.01
VI.CW.Y5.02/LUK42260
OperatingGuideTermixVMTDMIXCompact28

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.
VI.CW.Y5.02/LUK42260
©Danfoss|2019.01|7
OperatingGuideTermixVMTDMIXCompact28

5.0Design

5.1Design

Yoursubstationmightlookdifferentthanthesubstationshown.
Designdescription
B
Heatexchanger,DHW
F
Electroniccontroller
2
Singlecheckvalve
10
Circulatorpump,HE
8|©Danfoss|2019.01
11
Domestichotwaterpump
25
Pressuregaugewithballvalve 27AActuator,HE 27BActuator,DHW
30
Flowcontrollerwithintegratedcontrolvalve
48
Airvent,manual
VI.CW.Y5.02/LUK42260
Loading...
+ 16 hidden pages