Danfoss BVX-FI RO SEK Operating guide

OperatingGuide
TermixBVX-FIROSEK

1.0TableofContents

1.0TableofContents.............................................1
........................................................................2
2.0Functionaldescription......................................3
3.0Safetynotes.....................................................4
3.1SafetyNotes–general............................................4
4.0Mounting........................................................5
4.2Dismantletheinsulation.........................................7
4.3Mountingthedisplayoftheenergymeter....................10
4.4Start-up..............................................................11
4.5Electricalconnections.............................................13
5.0Design.............................................................14
5.1Design...............................................................14
5.2Schematicdiagram................................................15
6.0Controls..........................................................16
6.1Heatingcircuit......................................................16
6.2DHWtemperaturecontrol........................................19
6.3Other.................................................................20
6.4Maintenance........................................................22
7.0Troubleshooting..............................................23
7.1Troubleshootingingeneral......................................23
7.2TroubleshootingDHW............................................24
7.3TroubleshootingHE...............................................25
7.4Disposal.............................................................27
8.0Declaration......................................................31
8.1Declarationofconformity........................................31
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2.0Functionaldescription

Districtheatingsubstationforindirectheatingwithtankfor domestichotwaterpreparationandwiththermostaticor electroniccontrol.Connectionsatthetopofthestation.
Application
TheT ermixBVX-FIROSEKsubstationisacompletesolutionfor hotwaterandspaceheatingwithoptimalsafety,efficientenergy transfer,service-friendlyonstructionandacompactdesign.The substationisusedifaheatexchangerisrequiredoronaconversion todistrictheatingwheretheexistingequipmentisunsuitablefor directconnection.
Districtheating(DH)
Thesubstationisprefabricatedwithadifferentialpressure controller,fittingpieceandsensorpocketsforinsertionofaheat meteraswellasstrainersandballvalves.
Heating(HE)
Theheatingcircuitconsistsofaplateheatexchanger,safetyvalves, manometer,thermometers,ballvalves,drainvalve,airvalves, expansionvesselandcirculationpump.Thetemperatureofthe heatingiselectronicallycontrolledwithanoutdoortemperature sensor.Dependingontheapplication,differentheatexchangers dimensionedforcentralorfloorheatingwillbeused.
Domestichotwater(DHW)
Thedomestichotwatercircuitconsistsofahotwatertankwithcoil andapumpforcontrollingthetemperaturewithpossibilityfor DHWpriority.TheDHWtankandcoilareenamelledandthetank containsamagnesiumanode.
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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 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.
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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)
2.Domesticcoldwater(DCW)
3.Domestichotwater(DHW)
4.Heating(HE)return
5.Heating(HE)supply
6.Districtheating(DH)return
7.Districtheating(DH)supply
Authorizedpersonnelonly
Assembly,start-upandmaintenanceworkmustbeperformedby qualifiedandauthorizedpersonnelonly.
Connectionsizes:
Allconnections:
Dimensions(mm):
Withcover: H1910xW600xD600(typeBVX1–x) H1910xW600xD600(typeBVX2–x)
Weight(approx.):120-150kg
G¾”(int.thread)
Theconnectionsareatthetopofthestation.
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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.
Tightening
Duetovibrationduringtransport,allsubstationconnectionsmust becheckedandtightenedbeforeinstallation.
Unusedconnections
Unusedconnectionsandshut-offvalvesmustbesealedwitha plug.Shouldtheplugsrequireremoval,thismustonlybedoneby anauthorizedservicetechnician.
Installation:
Strainer
Ifastrainerissuppliedwiththestationitmustbefittedaccording toschematicdiagram.Pleasenotethatthestrainermaybe suppliedloose.
Connections
Internalinstallationanddistrictheatingpipesconnectionsmustbe madeusingthreaded,flangedorweldedconnections.
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4.2Dismantletheinsulation

4.2.1Dismantletheinsulationcover
Pulloutslightlythebottomofthecover.
4.2.2Pulloutthecover
Pulloutthecover.
4.2.3RemovetheECLplate
RemovetheECLplate.BecarefulwiththecablesfromtheECLand otherelectronics. Attention:Duringreassemble,pleaseensurethatallcablesare placedinthewiregrovesintheplate.Thiswillensureatightseal.
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4.2.4Removeplate
Removeplate,bypullingsidewaysawayfromtheunit. Attention:Duringreassemble,pleaseensurethatthecableisplacedinthewiregrove.Thiswillensureatightseal.
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4.2.5Removetheframe
Toremovetheframe,pullitslightlyforwardandthenup.
4.2.6Removethepumpplate
Pullbackthepumpplateandplaceitonthepipes. Attention:Becarefulwiththewireforthepressuregauge.
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4.3Mountingthedisplayoftheenergymeter

Markthepositionofthefixationpointsofthebracketfortheenergy displayandscrewthetwoplugssuppliedintotheinsulationfront.
Mountthebracketforthedisplayoftheenergymeter.
Mountthedisplay/calculatoroftheenergymeterontothebracket. Pullthewiresfromthesensorsinsidetheunitthroughthe duct/cut-outintheinsulationplate.
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4.4Start-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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4.5Electricalconnections

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
E
Hotwatertankwithcoil
2
Singlecheckvalve
4
Safetyvalve
9
Strainer
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Circulationpump
13
Chargingpump
14
Sensorpocket,energymeter
22
Testconnection
27
Actuator,HE
38
Expansiontank
41
Fittingpiece,energymeter
48
Airwent,manual
50
Diff.pressurecontrollerwithflowlimiter
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5.2Schematicdiagram

DHW
DCW
HWC
DH
Supply
DH
Return
Yoursubstationmightlookdifferentthantheschematicdiagramshown.
Schematicdescription
A
Heatexchanger,HE
E
Hotwatertankwithcoil
F
Electroniccontroller
1
Ballvalve
1A
Ballvalve,DVGW
2
Singlecheckvalve
4
Safetyvalve
9
Strainer
10
Circulationpump
DHW:DomesticHotWater DCW: HWC: DHSupply:DistrictHeatingSupply DHReturn: HESupply:HeatingSupply HEReturn:HeatingReturn
DomesticColdWater HotWaterCirculation
DistrictHeatingReturn
13
Chargingpump
14
Sensorpocket,energymeter
16
Outdoorsensor
19
Surfacesensor
20
Filling/drainvalve
22
Testconnection
24
Deliveredloosewithstation
26
Pressuregauge
27
Actuator
29
2-waymotorizedvalve
35
Ballvalve/non-returnvalve
38
Expansiontank
41
Fittingpiece,energymeter
44
Immersionsensor
48
Airvent,manual
50
Diff.pressurecontrollerwithflowlimiter
HE Supply
HE Return
5.2.1Technicalparameters
Technicalparameters
Nominalpressure:PN10(PN16versionsareavailableonenquiry) Max.DHsupplytemperature: Brazingmaterial(HEX):
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T–max=120°C Copper
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6.0Controls

6.1Heatingcircuit

6.1.1Differentialpressurecontroller
Thedifferentialpressurecontrollersmoothsoutthefluctuationsin pressurearrivingfromthedistrictheatingnetwork.Theoperating pressureinthesubstationisthusheldsteady.
6.1.2HEtemperaturecontrol
TheHEflowtemperatureintheheatingcircuitiscontrolledbythe HEtemperaturecontroller.
6.1.3Electroniccontrol
Substationswithelectroniccontrolmustbesetinaccordancewith manufacturer´sinstructions. Wheretheroomtemperatureiscontrolledbyradiatorthermostats, itisrecommendedthatthermostatsbesetforminimum temperatureineachroom.
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6.1.4Outdoortemperaturesensor(ESMT)
Outdoorsensorsshouldbemountedsoastoavoidexposureto directsunlight.Theyshouldnotbeplacedclosetodoors,windows orventilationoutlets.
6.1.5CirculatorpumpUPM3
UPM3Pumpscanbecontrolledinconstantpressure,proportional pressureorconstantspeedmodedefinedbythemeansofasmart userinterface. Thevariablespeedmodulatingmodesallowthepumptomatchits performancetothesystemrequirements,helpingtoreducenoise whenthermostaticvalvesareclosingdown. EnergylabellingclassA
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6.1.6GrundfosUPM3AUTOLinstructions
Controlmode
Youcanswitchfromtheperformanceviewtothesettingsviewbypressingthepushbutton.Thesettingsviewshowswhichmode controlsthecirculator.After2seconds,thedisplayswitchesbacktoperformanceview.
Ifyoupressthebuttonfor2to10seconds,theuserinterfaceswitchesto"settingselection"iftheuserinterfaceisunlocked.Youcan changethesettingsastheyappear.Theselectionofthecontrolmodedependsonthesystemtypeandtheallocationofpressurelosses.
Ifyoupressthekeylockformorethan10seconds,youcantogglebetweenenabling/disablingthekeylockfunction.
Function
Proportionalpressure1
Proportionalpressure2
Proportionalpressure3
Constantpressure1
Constantpressure2
Constantpressure3
ConstantCurve1
ConstantCurve2
ConstantCurve3
ConstantCurveMax.
Operationstatus
Function
Standby**OnlyPWMcontrolled
0%≤P1≤25%
25%≤P1≤50%
50%≤P1≤75%
75%≤P1≤100%
Recommendedfor
2-pipesystems
1-pipesystems
Underfloorheating
Green
Green
YellowYellowYellowYellow
YellowYellowYellowYellow
Alarmstatus
Function
Blocked
Supplyvoltagelow
Electricalerror
6.1.7HEpressuregauge
TheHEpressuregaugeindicatesthepressureoftheHEsystem.
RedYellowYellowYellowYellow
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6.2DHWtemperaturecontrol

DHWtemperaturecontrol
TherearevarioustypesofDHWtemperaturecontrolusedin Danfosssubstations. DHWtemperatureshouldbeadjustedto45-50°C,asthisprovides optimalutilisationofDHwater.AtDHWtemperaturesabove55°C, thepossibilityoflimescaledepositsincreasessignificantly.
6.2.1Electric2–waymotorizedvalve
Actuatorswithorwithoutsafetyfunctionareavailablefor3-point controls.Spring-returnactuatorscanbeusedtoprovidesafety shut-offintheeventofpowerfailure.
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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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