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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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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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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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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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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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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Installthepipes.Districtheatingsupplypipestobeinterchanged.

FitU-clamps.

Fitthepipeplugsatthebottomofthestation.

Fitthetopblock.

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4.2Start-up

Start-up,Indirectheating

Filling:

1:Firstfill

Whencarryingoutfirstfill,theheatexchangermustbeslowlyfilled
withwateruntilitreachesworkingpressure.

2:Pressuregauge

TheHEpressuregaugeindicatesthepressureoftheHEsystem.This
instructionmustbefollowedstrictly,toavoiddangeroussituations.

3:Supplyhose

AballvalvewithplugisinstalledintheHEreturnline.Tofillthe
system,theballvalvemustfirstbeclosed,theplugremovedand
asupplyhoseconnected.Onre-openingtheballvalve,system
fillcancommence.

4:Pre-pressure

Whenfillingthesystemwithwater,thepressuregaugeshouldbe
observedclosely.Theexpansionvesselissuppliedpre-pressurised
to0.5bar.Thepre-pressurerequiredateachsubstationwill
dependonsystemhead(thedistancebetweenthelowestand
highestpointinthesystem),forexample:

5:Fillingstop

Fillingmuststopwhenthepressuregaugeshowsapressure
approximately1-2barhigherthanthepre-pressuresetting.The
ballvalveisthenclosed,thehoseremovedandtheplugputback
in.

Re-tightenconnections

Afterwaterhasbeenaddedtothesystemandthesystemhasbeen
putintooperation,re-tightenALLconnections.

Pump

Thepumpmustbeswitchedoffduringsystemfill.

Height(m)Pressure(bar)

0–50,5

5–101,0

10–15

1,5

15–202,0

Start-up:

1:Pumpspeed

Setthepumptohighestspeedbeforestart-up.

2:Startpump

Startthepumpandheatthroughthesystem.

3:Openshut-offvalves

Theshut-offvalvesshouldthenbeopenedandtheunitobserved
asitentersservice.Visualcheckingshouldconfirmtemperatures,
pressures,acceptablethermalexpansionandabsenceofleakage.
Iftheheatexchangeroperatesinaccordancewithdesign,itcanbe
puttoregularuse.

4:Ventsystem

Switchoffthepumpandventtheinstallationaftertheradiators
havebeenwarmedup.

5:Adjustpumpspeed

Setthepumptothelowestspeedconsistentwithcomfortand
electricityconsumption.
Normallythechange-overswitchissetinthemidposition(default).
Howeverforsystemswithunderfloorheatingorsinglepipeloop
systems,itmaybenecessarytoturnthechange-overswitch
upwards.
Higherpumpspeedsareonlyusediftheheatingrequirement
increases.

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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).

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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

A

Heatexchanger,HE

B

Heatexchanger,DHW

F

Electroniccontroller

4

Safetyvalve,HE

9

Strainer

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Circulatorpump

11

Domestichotwaterpump

14

Sensorpocket,energymeter

20

Filling/drainvalve

25

Pressuregaugewithballvalve

26

Pressuregauge,HE
27AActuator,HE
27BActuator,DHW
48

Airvent,manual

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5.2Schematicdiagram

DH

Supply

DH

Return

Yoursubstationmightlookdifferentthantheschematicdiagramshown.

Schematicdescription

A

Heatexchanger,HE

B

Heatexchanger,DHW

F

Electroniccontroller

X

Plugconnections

1

Ballvalve

2

Singlecheckvalve

4

Safetyvalve

9

Strainer

10

Circulatorpump

11

Domestichotwaterpump

14

Sensorpocket,energymeter

16

Outdoorsensor

18

Thermometer

19

Surfacesensor

20

Filling/drainvalve

24

Deliveredloosewithunit

25

Pressuregaugewithballvalve

26

Pressuregauge

27

Actuator

30

Flowcontrollerwithintegratedcontrolvalve

40

Immersionsensor

48

Airvent,manual

HE
Supply

HE
Return

DHW

DCW

HWC

DHSupply:DistrictHeatingSupply
DHReturn:DistrictHeatingReturn
HESupply:HeatingSupply
HEReturn:HeatingReturn
DHW:
HWC:
DCW:

5.2.1Technicalparameters

Nominalpressure:
Max.DHsupplytemperature:
Min.DCWstaticpressure:
Brazingmaterial(HEX):
Heatexchangerstestpressure:30bar
Soundlevel:≤55dB

Domestichotwater
Hotwatercirculation
Domesticcoldwater

PN16
110°C

0.5bar
Copper

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6.0Controls

6.1Heatingcircuit

6.1.1Differentialpressurecontroller

Thedifferentialpressurecontrollersmoothsoutthefluctuationsin
pressurearrivingfromthedistrictheatingnetwork.Theoperating
pressureinthesubstationisthusheldsteady.

6.1.2HEtemperaturecontrol

TheHEflowtemperatureintheheatingcircuitiscontrolledbythe
HEtemperaturecontroller.

6.1.3Flowcontrollerwithintegratedcontrolvalve

Thecontrollerisaself-actingflowcontrollerwithintegratedcontrol
valve.Thecontrollercloseswhensetmax.flowisexceededand
canbeusedincombinationwithDanfosselectricalactuatorswith
orwithoutsafetyfunction.Springreturnmotorcanbeusedas
safetyfunctionbypowerfailure.

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6.1.4Electric2–waymotorizedvalve

Actuatorswithorwithoutsafetyfunctionareavailablefor3-point
controls.Spring-returnactuatorscanbeusedtoprovidesafety
shut-offintheeventofpowerfailure.

6.1.5Electroniccontrol

Substationswithelectroniccontrolmustbesetinaccordancewith
manufacturer´sinstructions.
Wheretheroomtemperatureiscontrolledbyradiatorthermostats,
itisrecommendedthatthermostatsbesetforminimum
temperatureineachroom.

6.1.6Outsidetemperaturesensor

Outdoorsensorsshouldbemountedsoastoavoidexposureto
directsunlight.Theyshouldnotbeplacedclosetodoors,windows
orventilationoutlets.

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6.1.7Circulatorpump

TheUPML,UPMXLcirculatorpumpsaredesignedforcirculating
liquidsinheatingsystemswithvariableflows,internallycontrolled
withthreeproportionalpressurecurvesandthreeconstant
pressure/powercurvestobeselectedviauserinterface.

EuP2015Ready.

TheMAGNA3circulatorpumpsaredesignedforcirculatingliquids
inheatingsystemswithvariableflowswhereyouwanttooptimise
thesettingofthepumpdutypoint,thusreducingenergycosts.

EuP2015Ready.

6.1.8GrundfosUPML/UPMXLinstructions

PP=Proportionalpressure(fastflash)
CP=Constantpressure(slowflash)

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6.1.9HEpressuregauge

TheHEpressuregaugeindicatesthepressureoftheHEsystem.

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6.2DHWtemperaturecontrol

DHWtemperaturecontrol

TherearevarioustypesofDHWtemperaturecontrolusedin
Danfosssubstations.
DHWtemperatureshouldbeadjustedto45-50°C,asthisprovides
optimalutilisationofDHwater.AtDHWtemperaturesabove55°C,
thepossibilityoflimescaledepositsincreasessignificantly.

6.2.1Flowcontrollerwithintegratedcontrolvalve

Thecontrollerisaself-actingflowcontrollerwithintegratedcontrol
valve.Thecontrollercloseswhensetmax.flowisexceededand
canbeusedincombinationwithDanfosselectricalactuatorswith
orwithoutsafetyfunction.Springreturnmotorcanbeusedas
safetyfunctionbypowerfailure.

6.2.2Electric2–waymotorizedvalve

Actuatorswithorwithoutsafetyfunctionareavailablefor3-point
controls.Spring-returnactuatorscanbeusedtoprovidesafety
shut-offintheeventofpowerfailure.

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6.2.3Domestichotwaterpump

Important!

Itisnecessarytomountadomestichotwatercirculationpumpon
thewaterheatertoavoidregulationproblems.
Thecirculationpumpcannotbeswitchedoff,sincethiswillresult
inregulationproblems.(noflowatthesensor).

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6.3Other

6.3.1Safetyvalve

Thepurposeofthesafetyvalveistoprotectthesubstationfrom
excessivepressure.
Theblow-offpipefromthesafetyvalvemustnotbeclosed.The
blow-offpipeoutletshouldbeplacedsothatitdischargesfreely
anditispossibletoobserveanydrippingfromthesafetyvalve.
Itisrecommendedtochecktheoperationofsafetyvalvesat
intervalsof6months.Thisisdonebyturningthevalveheadin
directionindicated.

6.3.2Strainer

Strainersshouldbecleanedregularlybyauthorizedpersonnel.The
frequencyofcleaningwoulddependonoperatingconditionsand
themanufacturer’sinstructions.

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6.3.3Fittingpiece

Thesubstationisequippedwithafittingpieceforenergymeter.

Assemblyofenergymeters:

1:Closeballvalves

ClosetheballvalvesonDHSupplyandDHReturn,ifthereiswater
onthesystem.

2:Loosennuts

Loosenthenutsonthefittingpiece.

3:Removefittingpiece

Removethefittingpieceandreplaceitwiththeenergymeter.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.

Venting

Checkingthatthesystemisthoroughlyvented.

Authorizedpersonnelonly

Assembly,start-upandmaintenanceworkmustbeperformedby
qualifiedandauthorizedpersonnelonly.

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.

Authorizedpersonnelonly

Assembly,start-upandmaintenanceworkmustbeperformedby
qualifiedandauthorizedpersonnelonly.

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7.2TroubleshootingDHW

ProblemPossiblecauseSolution

ToolittleornoDHW.

Taptemperaturetoohigh;DHWtapload
toohigh.

Temperaturedropduringtapping.

Thermostaticcontrolvalvedoesnotclose

Strainerinsupplyorreturnlineclogged.Cleanstrainer(s).

DHWcirculationpumpoutoforderorwith
toolowsetting.

Defectiveorcloggednon-returnvalve.

Noelectricity.Check.

Wrongsettingofautomaticcontrols,ifany.Toadjustanelectroniccontrollerfor

Scalingoftheplateheatexchanger.

Defectivemotorizedvalve.Check(usemanualfunction)–replace.

Defectivetemperaturesensors.

Defectivecontroller.

DCWisbeingmixedwiththeDHW,e.g.ina
defectivethermostaticmixingvalve.

Defectiveorcloggednon-returnvalveon
circulationvalve.

Thermostaticvalveadjustedtoatoohigh
level.

Scalingoftheplateheatexchanger.

LargerDHWflowthanthesubstationhas
beendesignedfor.

TemperaturedifferencebetweenDH
supplyandDHWsetpointtoolow.

Checkcirculationpump.

Replace–clean.

DHW,pls.noteenclosedinstructionsfor
electroniccontroller.

Replace–rinseout.

Check–replace.

Check–replace.

Check–replace. Hotwaterinsometapsbutnotinall.

Replace–clean.

Check–set.

Replace–rinseout.

ReduceDHWflow.

Lowerthesetpointtemperatureorincrease
theDHsupplytemperature.

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7.3TroubleshootingHE

ProblemPossiblecauseSolution

Toolittleornoheat.StrainercloggedinDHorHEcircuit

Unevenheatdistribution.Airpocketsinthesystem.Venttheinstallationthoroughly.

DHsupplytemperaturetoohigh.

DHsupplytemperaturetoolow.

(radiatorcircuit).

ThefilterintheenergymeteronDHcircuit
clogged.

Defectiveorwronglyadjusteddifferential
pressurecontroller.

Sensordefective–orpossiblydirtinthe
valvehousing.

Automaticcontrols,ifany,wronglysetor
defective-possiblypowerfailure.

Pumpoutofoperation.Checkifthepumpisreceivingpowerand

Thepumpissetattoolowspeedof
rotation.

Pressuredrop–thepressuredropon
theradiatorcircuitshowslowerthan
recommendedoperatingpressure.

Airpocketsinthesystem.Venttheinstallationthoroughly.

Limitingofthereturntemperatureadjusted
toolow.

Defectiveradiatorvalves.

Unevenheatdistributioninbuilding
becauseofincorrectlysetbalancingvalves,
orbecausetherearenobalancingvalves.

Diameterofpipetosubstationtoosmallor
branchpipetoolong.

Wrongsettingofthermostatorof
automaticcontrols,ifany.

Defectivecontroller.Thecontrollerdoes
notreactasitshouldaccordingtothe
instructions.

Defectivesensoronself-actingthermostat.

Wrongsettingofautomaticcontrols,ifany.

Defectivecontroller.Thecontrollerdoes
notreactasitshouldaccordingtothe
instructions.

Defectivesensoronself-actingthermostat.

Wrongplacement/fittingofoutdoor
temperaturesensor.

Strainerclogged.Cleangate/strainer.

Cleangate/strainer(s).

Cleanthefilter(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
radiatorscomparedtothetotalheating
requirementofthebuilding.

Poorutilizationofexistingheatingsurface.
Defectivesensoronself-actingthermostat.

Thesystemissinglepipeloop.

Pumppressuretoohigh.Adjustpumptoalowerlevel.

Airinsystem.

Defectiveorincorrectlysetradiatorvalve(s).
Singlepipeloopsystemsrequirespecial
one-piperadiatorvalves.

Dirtinthemotorizedvalveorinthe
differentialpressurecontroller.

Defectivemotorizedvalve,sensoror
automaticcontroller.

Electroniccontrollernotadjustedcorrectly.Adjustaccordingtoinstructions.

Pumppressuretoohigh.Adjustpumptoalowerlevel.

Defectivemotorizedvalve,sensoror
electroniccontroller.

Increasetotalheatingsurface.

Makesuretheheatisdistributedevenly
acrossthefullheatingsurface–openall
radiatorsandkeeptheradiatorsinthe
systemfromheatingupatthebottom.It
isextremelyimportanttokeepthesupply
temperaturetotheradiatorsaslowas
possible,whilemaintainingareasonable
levelofcomfort.

Thesystemshouldfeatureelectronic
controlsaswellasreturnsensors.

Ventthesystem.

Check–set/replace.

Check–cleanout.

Check–replace.

Check–replace.

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7.4Disposal

Disposal

Thisproductshouldbedismantledanditscomponents
sorted,ifpossible,invariousgroupsbeforerecycling
ordisposal.

Alwaysfollowthelocaldisposalregulations.

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8.0Declaration

8.1Declarationofconformity

Category0withelectricalequipment

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