Danfoss Termix Compact 28 VX-FI Operating instructions

Brand: Danfoss

Model: Termix Compact 28 VX-FI

Type: Operating instructions

Danfoss Termix Compact 28 VX-FI is a heat exchanger unit for the production of heating in large buildings. It can be used for connection to indirect district heating in places where the district heating plant requires a hydraulic break on the plant side. It is also suitable for conversion to district heating when the secondary heating system is suitable to being connected to direct district heating or when a particularly effective security against leakage in the heating system is required. It is possible to connect a hot-water tank.

The substation is fitted with an efficient plate heat exchanger, which ensures the most favorable heat extraction and achieves optimum comfort and operating economy.

OperatingGuide

TermixCompact28VX-FI

1.0TableofContents

1.0TableofContents.............................................1

........................................................................2

2.0Functionaldescription......................................3

3.0Safetynotes.....................................................4

3.1SafetyNotes–general............................................4

4.0Mounting........................................................5

4.1MountingtheCompactstation..................................5

4.2Start-up..............................................................12

4.3Electricalconnections.............................................13

5.0Design.............................................................14

5.1Design...............................................................14

5.2Schematicdiagram................................................15

6.0Controls..........................................................17

6.1Heatingcircuit......................................................17

6.2Other.................................................................20

6.3Maintenance........................................................22

7.0Troubleshooting..............................................23

7.1Troubleshootingingeneral......................................23

7.2TroubleshootingHE...............................................23

7.3Disposal.............................................................24

8.0Declaration......................................................27

8.1Declarationofconformity........................................27

DanfossDistrictEnergy

VI.LZ.M1.02/LUK42363

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OperatingGuideTermixCompact28VX-FI

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DanfossDistrictEnergy

OperatingGuideTermixCompact28VX-FI

2.0Functionaldescription

Districtheatingsubstationforindirectheating.

Spaceheating

TheTermixCompact28VX-FIisaheatexchangerunitforthe

productionofheatinginlargebuildingssuchassportscentres,

schools,blocksofatsetc.Itcanbeusedforconnectiontoindirect

districtheatinginplaceswherethedistrictheatingplantrequiresa

hydraulicbreakontheplantside.Itisalsosuitableforconversion

todistrictheatingwhenthesecondaryheatingsystemissuitable

tobeingconnectedtodirectdistrictheatingorwhenaparticularly

effectivesecurityagainstleakageintheheatingsystemisrequired.

Itispossibletoconnectahot-watertank.

Efcientheatexchanger

Thesubstationisttedwithanefcientplateheatexchanger,

whichensuresthemostfavourableheatextractionandachieves

optimumcomfortandoperatingeconomy.

Severalvariants

TermixCompact28VX-FIisbuiltwithaheatexchangerforspace

heating,owcontroller,pump,electronicregulationoftheheating

circuitaswellasadirectoutletforahotwatertank.Theelectronic

controllerisfactorypre-set.Electricalcomponentsarepre-wired,

andtheunitisequippedwithaplugfor230Va.c.

Itisrecommendedthatdynamicbalancingvalvesareinstalledin

thebuilding’srisersintheheatsupplyandontheheatingsystem’s

returnlineimmediatelybeforetheunit.

TermixCompact28VX-FIisproducedinstandardconstructions:

•VXwithheatexchangerforindirectheating.

•VXwithheatexchangerforindirectheatingandintegrated

tankregulation.

Flexiblesolution

Pipeconnectioncanbemadefromeitherthetoporbottom,which

makesthissolutionhighlyexible.Atthesametime,bothspace

andtimearesavedwheninstalling.

Minimalheatloss

Completeinsulationoftheunitensuresminimalheatloss.

Reliableandeasytoinstall

TermixCompact28VX-FIisoperationallyreliable.Aqualityproduct

manufacturedinDenmark,whichiseasytoinstallandquickly

commissioned.

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OperatingGuideTermixCompact28VX-FI

3.0Safetynotes

3.1SafetyNotes–general

Thefollowinginstructionsrefertothestandarddesignof

substation.Specialversionsofsubstationsareavailableon

request.

Thisoperatingmanualshouldbereadcarefullybeforeinstallation

andstart-upofthesubstation.Themanufactureracceptsno

liabilityfordamageorfaultsthatresultfromnon-compliancewith

theoperatingmanual.Pleasereadandfollowalltheinstructions

carefullytopreventaccidents,injuryanddamagetoproperty.

Assembly,start-upandmaintenanceworkmustbeperformedby

qualiedandauthorizedpersonnelonly.

Pleasecomplywiththeinstructionsissuedbythesystem

manufacturerorsystemoperator.

Corrosionprotection

Allpipesandcomponentsaremadeofstainlesssteelandbrass.

Themaximumchloridecompoundsoftheowmediumshouldnot

behigherthan150mg/l.

Theriskofequipmentcorrosionincreasesconsiderablyifthe

recommendedlevelofpermissiblechloridecompoundsis

exceeded.

Energysource

Thesubstationisdesignedfordistrictheatingastheprimary

sourceofenergy.However,alsootherenergysourcescanbeused

wheretheoperatingconditionsallowitandalwaysarecomparable

todistrictheating.

Application

Thesubstationisdesignedtobeconnectedtothehouse

installationinafrost-freeroom,wherethetemperaturedoesnot

exceed50°Candthehumiditydoesnotexceed60%.Donotcover

orwallupthesubstationorinanyotherwayblocktheentrance

tothestation.

Choiceofmaterial

Choiceofmaterialsalwaysincompliancewithlocallegislation.

Safetyvalve(s)

Werecommendmountingofsafetyvalve(s),however,alwaysin

compliancewithlocalregulations.

Connection

Thesubstationmustbeequippedwithfeaturesthatensurethat

thesubstationcanbeseparatedfromallenergysources(also

powersupply).

Emergency

Incaseofdangeroraccidents-re,leaksorotherdangerous

circumstances-interruptallenergysourcestothestationif

possible,andseekexperthelp.

Incaseofdiscolouredorbad-smellingdomestichotwater,closeall

shut-offvalvesonthesubstation,informtheoperatingpersonnel

andcallforexperthelpimmediately.

Storage

Anystorageofthesubstationwhichmaybenecessarypriorto

installationshouldbeinconditionswhicharedryandheated.

Authorizedpersonnelonly

Assembly,start-upandmaintenanceworkmustbeperformedby

qualiedandauthorizedpersonnelonly.

Pleaseobserveinstructionscarefully

Toavoidinjurytopersonsanddamagetothedevice,itisabsolutely

necessarytoreadandobservetheseinstructionscarefully.

Warningofhighpressureandtemperature

Beawareoftheinstallation’spermissiblesystempressureand

temperature.

Themaximumtemperatureoftheowmediuminthesubstationis

110°C.

Themaximumoperatingpressureofthesubstationis16bar.

Theriskofpersonsbeinginjuredandequipmentdamagedincreases

considerablyiftherecommendedpermissibleoperatingparameters

areexceeded.

Thesubstationinstallationmustbeequippedwithsafetyvalves,

however,alwaysinaccordancewithlocalregulations.

Warningofhotsurface

Thesubstationhasgothotsurfaces,whichcancauseskinburns.

Pleasebeextremelycautiousincloseproximitytothesubstation.

Powerfailurecanresultinthemotorvalvesbeingstuckinopen

position.Thesurfacesofthesubstationcangethot,whichcancause

skinburns.Theballvalvesondistrictheatingsupplyandreturnshould

beclosed.

Warningoftransportdamage

Beforesubstationinstallation,pleasemakesurethatthesubstation

hasnotbeendamagedduringtransport.

IMPORTANT-Tighteningofconnections

Duetovibrationsduringtransportallangeconnections,screwjoints

andelectricalclampandscrewconnectionsmustbecheckedand

tightenedbeforewaterisaddedtothesystem.Afterwaterhasbeen

addedtothesystemandthesystemhasbeenputintooperation,

re-tightenALLconnections.

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OperatingGuideTermixCompact28VX-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.Tankowline(TFL)

6.Tankreturnline(TRL)

Connectionsizes:

DH+HE:

G1”(int.thread)

TFL+TRL:

G¾”(int.thread)

Dimensions(mm):

Withinsulation:

H890xW905xD400

Weight(approx.):60kg

Authorizedpersonnelonly

Assembly,start-upandmaintenanceworkmustbeperformedby

qualiedandauthorizedpersonnelonly.

Thepipeplacementcandeviatefromtheshowndrawing.Pleasenote

themarkingsonthestation.

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OperatingGuideTermixCompact28VX-FI

Removethefront.

Removeotherblocks.

Attachthemountingrailtothewall.

Liftthestation.

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OperatingGuideTermixCompact28VX-FI

Mountthestationonthemountingrail.

Attachthestationtothewallintheholesonthemountingplate.

Installthesafetyvalve.

Installballvalves.

MountblockA(CifitistheMagnapump)ontheleft-handsideof

thepump.AttachblockEtoblockA/C,andattachittothepipe

abovethepumpbyclickingitinplace.

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OperatingGuideTermixCompact28VX-FI

MountblockB(DifitistheMagnapump)ontheright-handsideof

thepump.

MountblockF(GforVM2valve).Theblockishingedandcanbe

drawnaroundthevalve.AttachtheblocktoblockB/DandE.

MountblockJandHaroundthevalveforthetankcontrol.

Mountthefrontcover.

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OperatingGuideTermixCompact28VX-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

Ifastrainerissuppliedwiththestationitmustbettedaccording

toschematicdiagram.Pleasenotethatthestrainermaybe

suppliedloose.

Connections

Internalinstallationanddistrictheatingpipesconnectionsmustbe

madeusingthreaded,angedorweldedconnections.

Keyholeformounting.

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OperatingGuideTermixCompact28VX-FI

4.1.2Pipeconnectionsup

Removethetopblock.

Removethepipeplugsatthetopofthestation.

RemoveU-clamps.

Removepipes.Anglesandteesareturnedsothatpipescanbe

installedfromabove.

Installthepipes.Districtheatingsupplypipestobeinterchanged.

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OperatingGuideTermixCompact28VX-FI

FitU-clamps.

Fitthepipeplugsatthebottomofthestation.

Fitthetopblock.

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OperatingGuideTermixCompact28VX-FI

4.2Start-up

Start-up,Indirectheating

Filling:

1:Firstll

Whencarryingoutrstll,theheatexchangermustbeslowlylled

withwateruntilitreachesworkingpressure.

2:Pressuregauge

TheHEpressuregaugeindicatesthepressureoftheHEsystem.This

instructionmustbefollowedstrictly,toavoiddangeroussituations.

3:Supplyhose

AballvalvewithplugisinstalledintheHEreturnline.Tollthe

system,theballvalvemustrstbeclosed,theplugremovedand

asupplyhoseconnected.Onre-openingtheballvalve,system

llcancommence.

4:Pre-pressure

Whenllingthesystemwithwater,thepressuregaugeshouldbe

observedclosely.Theexpansionvesselissuppliedpre-pressurised

to0.5bar.Thepre-pressurerequiredateachsubstationwill

dependonsystemhead(thedistancebetweenthelowestand

highestpointinthesystem),forexample:

5:Fillingstop

Fillingmuststopwhenthepressuregaugeshowsapressure

approximately1-2barhigherthanthepre-pressuresetting.The

ballvalveisthenclosed,thehoseremovedandtheplugputback

in.

Start-up:

1:Pumpspeed

Setthepumptohighestspeedbeforestart-up.

2:Startpump

Startthepumpandheatthroughthesystem.

3:Openshut-offvalves

Theshut-offvalvesshouldthenbeopenedandtheunitobserved

asitentersservice.Visualcheckingshouldconrmtemperatures,

pressures,acceptablethermalexpansionandabsenceofleakage.

Iftheheatexchangeroperatesinaccordancewithdesign,itcanbe

puttoregularuse.

4:Ventsystem

Switchoffthepumpandventtheinstallationaftertheradiators

havebeenwarmedup.

5:Adjustpumpspeed

Setthepumptothelowestspeedconsistentwithcomfortand

electricityconsumption.

Normallythechange-overswitchissetinthemidposition(default).

Howeverforsystemswithunderoorheatingorsinglepipeloop

systems,itmaybenecessarytoturnthechange-overswitch

upwards.

Higherpumpspeedsareonlyusediftheheatingrequirement

increases.

Re-tightenconnections

Afterwaterhasbeenaddedtothesystemandthesystemhasbeen

putintooperation,re-tightenALLconnections.

Pump

Thepumpmustbeswitchedoffduringsystemll.

Height(m)Pressure(bar)

0–50,5

5–101,0

10–15

1,5

15–202,0

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OperatingGuideTermixCompact28VX-FI

Underoorheating:

Pumpstopfunction

Ifthesubstationisusedinconnectionwithunderoorheating,the

circulationpumpmustbeconnectedtothepumpstopfunctionin

theunderoorheatingcontroller.Thepumpmustbestoppedif

allunderoorheatingcircuitsareclosed.

Warranty

Ifthisisnotpossible,thenowmustbecontinuedthroughthe

by-pass.Failingthis,thepumpwillbeatriskofseizureandany

remainingwarrantywillbewithdrawn.

Summeroperation:

Switchoffpump

Insummerthecirculationpumpmustbeswitchedoffandthe

shut-offvalvetoHEsupplyclosed.

Runningpumpbi-weekly

Itisrecommendedtostartupthecirculationpump(for2minutes)

onceamonthduringsummer;theshut-offvalveoftheHEsupply

mustbeshut.

Electroniccontroller

Mostelectroniccontrollerswillstartupthepumpautomatically

(pleasenotemanufacturer´sinstructions).

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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OperatingGuideTermixCompact28VX-FI

5.0Design

5.1Design

Yoursubstationmightlookdifferentthanthesubstationshown.

Designdescription

Heatexchanger,HE

Circulatorpump

Pressuregauge,HE

Electroniccontroller

Sensorpocket,energymeter

27AActuator,HE

Safetyvalve,HE

Filling/drainvalve

27E

Actuator,Tank

Strainer

Pressuregaugewithballvalve

Airvent,manual

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OperatingGuideTermixCompact28VX-FI

5.2Schematicdiagram

5.2.1SchematicdiagramTermixCompact28VX-FI

Supply

Return

TRL

TFL

Yoursubstationmightlookdifferentthantheschematicdiagramshown.

Schematicdescription

Heatexchanger,HE

Sensorpocket,energymeter

Pressuregaugewithballvalve

Electroniccontroller

Outdoorsensor

Pressuregauge

Ballvalve

Thermometer

Actuator

Safetyvalve

Surfacesensor

Flowcontrollerwithintegratedcontrolvalve

Strainer

Filling/drainvalve

Airvent,manual

Circulatorpump

Deliveredloosewithunit

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OperatingGuideTermixCompact28VX-FI

5.2.2SchematicdiagramTermixCompact28VX-FIwithtankregulationmounted

Supply

Return

DHW

HWC

DCW

Yoursubstationmightlookdifferentthantheschematicdiagramshown.

Schematicdescription

Heatexchanger,HE

Domestichotwaterpump

Pressuregaugewithballvalve

Hotwatertankwithcoil

Sensorpocket,energymeter

Pressuregauge

Electroniccontroller

Outdoorsensor

Actuator

Borderofdelivery

Thermometer

2-waymotorizedvalve

Ballvalve

Surfacesensor

Flowcontrollerwithintegratedcontrolvalve

Singlecheckvalve

Filling/drainvalve

Differentialpressurecontroller

Safetyvalve

Ballvalve

Immersionsensor

Strainer

Deliveredloosewithunit

Airvent,manual

Circulatorpump

DHSupply:DistrictHeatingSupply

DHReturn:DistrictHeatingReturn

HESupply:HeatingSupply

HEReturn:HeatingReturn

TFL:

Tankowline

TRL:

Tankreturnline

DHW:

Domestichotwater

HWC:

Hotwatercirculation

DCW:

Domesticcoldwater

5.2.3Technicalparameters

Nominalpressure:

PN16

Max.DHsupplytemperature:

110°C

Brazingmaterial(HEX):

Copper

Heatexchangerstestpressure:30bar

Soundlevel:≤55dB

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OperatingGuideTermixCompact28VX-FI

6.0Controls

6.1Heatingcircuit

6.1.1Differentialpressurecontroller

Thedifferentialpressurecontrollersmoothsouttheuctuationsin

pressurearrivingfromthedistrictheatingnetwork.Theoperating

pressureinthesubstationisthusheldsteady.

6.1.2Flowcontrollerwithintegratedcontrolvalve

Thecontrollerisaself-actingowcontrollerwithintegratedcontrol

valve.Thecontrollercloseswhensetmax.owisexceededand

canbeusedincombinationwithDanfosselectricalactuatorswith

orwithoutsafetyfunction.Springreturnmotorcanbeusedas

safetyfunctionbypowerfailure.

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OperatingGuideTermixCompact28VX-FI

6.1.3Electric2–waymotorizedvalve

Actuatorswithorwithoutsafetyfunctionareavailablefor3-point

controls.Spring-returnactuatorscanbeusedtoprovidesafety

shut-offintheeventofpowerfailure.

6.1.4Electroniccontrol

Substationswithelectroniccontrolmustbesetinaccordancewith

manufacturer´sinstructions.

Wheretheroomtemperatureiscontrolledbyradiatorthermostats,

itisrecommendedthatthermostatsbesetforminimum

temperatureineachroom.

6.1.5Outsidetemperaturesensor

Outdoorsensorsshouldbemountedsoastoavoidexposureto

directsunlight.Theyshouldnotbeplacedclosetodoors,windows

orventilationoutlets.

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OperatingGuideTermixCompact28VX-FI

6.1.6Circulatorpump

TheUPML,UPMXLcirculatorpumpsaredesignedforcirculating

liquidsinheatingsystemswithvariableows,internallycontrolled

withthreeproportionalpressurecurvesandthreeconstant

pressure/powercurvestobeselectedviauserinterface.

EuP2015Ready.

TheMAGNA3circulatorpumpsaredesignedforcirculatingliquids

inheatingsystemswithvariableowswhereyouwanttooptimise

thesettingofthepumpdutypoint,thusreducingenergycosts.

EuP2015Ready.

6.1.7GrundfosUPML/UPMXLinstructions

PP=Proportionalpressure(fastash)

CP=Constantpressure(slowash)

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OperatingGuideTermixCompact28VX-FI

6.1.8HEpressuregauge

TheHEpressuregaugeindicatesthepressureoftheHEsystem.

6.2Other

6.2.1Safetyvalve

Thepurposeofthesafetyvalveistoprotectthesubstationfrom

excessivepressure.

Theblow-offpipefromthesafetyvalvemustnotbeclosed.The

blow-offpipeoutletshouldbeplacedsothatitdischargesfreely

anditispossibletoobserveanydrippingfromthesafetyvalve.

Itisrecommendedtochecktheoperationofsafetyvalvesat

intervalsof6months.Thisisdonebyturningthevalveheadin

directionindicated.

6.2.2Strainer

Strainersshouldbecleanedregularlybyauthorizedpersonnel.The

frequencyofcleaningwoulddependonoperatingconditionsand

themanufacturer’sinstructions.

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Danfoss Termix Compact 28 VX-FI Operating instructions

Brand: Danfoss

Model: Termix Compact 28 VX-FI

Type: Operating instructions

The substation is fitted with an efficient plate heat exchanger, which ensures the most favorable heat extraction and achieves optimum comfort and operating economy.

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Danfoss Termix Compact 28 VX-FI Operating instructions

Danfoss Termix Compact 28 VX-FI Operating instructions

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