Danfoss Compact 28 VVX-FI Operating guide
OperatingGuide
TermixCompact28VVX-FI
1.0TableofContents
1.0TableofContents.............................................1
2.0Functionaldescription......................................2
3.0Safetynotes.....................................................3
3.1SafetyNotes–general............................................3
4.0Mounting........................................................4
4.1MountingtheCompactstation..................................4
4.2Start-up..............................................................13
4.3Electricalconnections.............................................15
5.0Design.............................................................16
5.1Design...............................................................16
5.2Schematicdiagram................................................17
6.0Controls..........................................................18
6.1Heatingcircuit......................................................18
6.2DHWtemperaturecontrol........................................22
6.3Other.................................................................24
6.4Maintenance........................................................26
7.0Troubleshooting..............................................27
7.1Troubleshootingingeneral......................................27
7.2TroubleshootingDHW............................................28
7.3TroubleshootingHE...............................................29
7.4Disposal.............................................................31
8.0Declaration......................................................35
8.1Declarationofconformity........................................35
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OperatingGuideTermixCompact28VVX-FI
2.0Functionaldescription
Districtheatingsubstationforindirectheatingand
instantaneousdomestichotwater.
Spaceheatinganddomestichotwater(DHW)
TheT ermixCompact28VVX-FIisacompleteunitforindirect
spaceheatinganddomestichotwaterfordistrictheatinginlarge
buildingssuchassportscentres,schools,blocksofflatsetc.
Itcanbeusedforconnectiontoindirectdistrictheatinginplaces
wherethedistrictheatingplantrequiresahydraulicbreak.Itis
alsosuitableforconversiontodistrictheatingwhenthesecondary
heatingsystemisunsuitabletobeingconnectedtodirectdistrict
heatingorwhenaparticularlyeffectivesecurityagainstleakagein
theheatingsystemisrequired.
Efficientheatexchanger
Thesubstationisfittedwithanefficientplateheatexchanger,
whichensuresthemostfavourableheatextractionandachieves
optimumcomfortandoperatingeconomy.
Electronicregulation
TheTermixCompact28VVX-FIisbuiltwithaplateheatexchanger
forinstantaneousdomestichotwaterproductionandheat
exchangerforspaceheating.Eachcircuitisalsosuppliedwithits
ownflowcontroller.
Thisallowsthegreatestdegreeofindividualcontrol,thus
preventingoscillationatdifferentloads.Theelectroniccontrolleris
factorypre-set.Electricalcomponentsarepre-wired,andtheunitis
equippedwithaplugfor230Va.c.
Itisrecommendedthatbalancingvalvesareinstalledinthe
building’srisersintheheatsupplyandontheheatingsystem’s
returnlineimmediatelybeforetheunit.
Minimalheatloss
Completeinsulationoftheunitensuresminimalheatloss.
Easyinstallation
Theunitconsistsoftwomodules,oneforspaceheatingandone
fordomestichotwaterproduction,whichiseasilyassembled
intoonesinglemodule.Thismodulardesignmakesworkduring
installationsignificantlyeasier,astheweightissplitbetweentwo
modulesduringhandling.
Flexiblesolution
Pipeconnectioncanbemadefromeitherthetoporbottom,which
makesthissolutionhighlyflexible.Atthesametime,bothspace
andtimearesavedwheninstalling.
Reliableandeasytoinstall
TermixCompact28VVX-FIisoperationallyreliable.Aquality
productmanufacturedinDenmarkwhichiseasytoinstalland
quicklycommissioned.
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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
110°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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OperatingGuideTermixCompact28VVX-FI
4.0Mounting
4.1MountingtheCompactstation
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):
Withinsulation:
Weight(approx.):95kg
G1”(int.thread)
G1”(int.thread)
G¾”(int.thread)
H890xW1460xD400
Thepipeplacementcandeviatefromtheshowndrawing.Pleasenote
themarkingsonthestation.
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Removethefront.
Removetheotherblocksandthewhitepolystyrene.
Attachthemountingrailtothewall.
Liftthestation’sheatingsection.
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OperatingGuideTermixCompact28VVX-FI
Mountthestationasfartotheleftontherailaspossible.
Liftthestation’sinstantaneousdomestichotwaterpart.
Mounttheinstantaneousdomestichotwaterpartonthe
right-handsideofthefittings.
Pushthetwopartstogether.Thetwomountingplatesmustclick
togetherintheoverlap.
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Attachthestationtothewallintheholesonthemountingplate.
Assemblethepowerconnectoronthehotwaterpartofthestation.
Forproperfunctionality,connectorsmustbepairedbycolour.
Installthesafetyvalve.
Installtheballvalves.
MountblockA(CifitistheMagnapump)ontheleft-handsideof
thepump.AttachblockEtoblockA/C,andattachittothepipe
abovethepumpbyclickingitinplace.
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OperatingGuideTermixCompact28VVX-FI
MountblockB(DifitistheMagnapump)ontheright-handsideof
thepump.
MountblockF(GforVM2valve).Theblockishingedandcanbe
drawnaroundthevalve.AttachtheblocktoblockB/DandE.
MountblockL.Theblockishingedandcanbepulledaroundthe
UPM3pump.
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MountblockM.Theblockishingedandcanbedrawnaroundthe
valve.AttachtheblocktoblockL.
Mountthesmallfrontcover.
Mountthelargefrontcover.
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OperatingGuideTermixCompact28VVX-FI
4.1.1InstallingtheCompactstation
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
Ifastrainerissuppliedwiththestationitmustbefittedaccording
toschematicdiagram.Pleasenotethatthestrainermaybe
suppliedloose.
Connections
Internalinstallationanddistrictheatingpipesconnectionsmustbe
madeusingthreaded,flangedorweldedconnections.
Keyholeformounting.
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4.1.2Pipeconnectionsup
Removethetopblock.
Removethepipeplugsatthetopofthestation.
RemoveU-clamps.
Removepipes.
Anglesandteesareturnedsothatpipescanbeinstalledfrom
above.
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