Maintenance-free, electronic VRE1 volume flow controller€¦ · for ventilation and air conditioning systems. Versatile. Sizes DN 100 to DN 400. Operatingvoltage: 24 V AC/DC. Operationmodes:

User Manual 3.3 (2016-01) 1

Maintenance-free, electronic

VRE1 volume flow controllerfor ventilation and air conditioning systems. Versatile.

■ SizesDN100toDN400.■ Operatingvoltage:24VAC/DC.■ Operationmodes:Constant,4-point,Variable(0–10V,2–10V,2–8V).■ LeaktightnessclassesaccordingtoDINEN1751:CasingC,shut-offdamper3and4.■ Measuringdeviceintegratedintothedamperblade.Outstandingcontrolaccuracy.■ Displaysandsettingsarecarriedoutdigitally,alsousingaPC.■ Efficiencysignalforoptimisingthefanoutputduringoperation.■ Overridesforcompleteopeningandclosing.

New24 V AC/DC

TheGermanoriginalversionofthisdocumentshallprevail.

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Subject to changeUser Manual 3.3 (2016-01) 2

VRE1 volume flow controllers measure the volume flow directly atthedamperblade.The duct casing is free of disruptingmeasuringleadsandotherinbuiltpartswhich results in large free cross-sec-tions.Theflowdoesnotpassthroughthemeasuring device! It is thereforeimmune to noise.The motorised actuator M1 is equippedwith plain text displays, anilluminated display and adjustmentbuttons.LEDstatusdisplaysprovideinformation on the current operatingstatusofthevolumeflowcontrolleratall times using different colours and signaltypes.Inaddition,allsettingsanddisplayscanbetransferredtoaPCviatheRS232interface located on the front,wheretheycanbeviewedandexecuted.The motorised actuator M2 is not equipped with plain text displays, dis-play,adjustmentbuttonsandLEDstatusdisplays.ThesettingsanddisplaysarecarriedoutusingaPCvia theRS232interface.Settingscanalsobemadeandorde-red at the factory.Changes canbemadeon site via the adjustment but-tonsorusingaPC.

VRE1 volume flow controllerFeatures

OptionVRE1 volume flow controller with acoustic insulation for thermalinsulationandreductionofsoundradiationtotheoutside.

AllillustrationsshowVRE1volumeflowcontrollerswithmotorisedactuatorM1andlipseals.

Maximumpossiblereductionofflownoise Soundattenuatorlength Size Outerdiameter L1 L[mm] DN ∅[mm] [mm] 600 900

100 200 40 -27dB -31dB 125 225 40 -25dB -28dB 160 260 40 -22dB -26dB 200 300 40 -20dB -25dB 250 355 40 -18dB -22dB 315 415 40 -16dB -20dB 400 500 65 - -20dB

OptionSRC duct silencer for volume flow controller forreductionofflownoiseintheventilationduct.

Strain-relieved,assembly-optimisedconnectionplug.

Air flow direction

Subject to change User Manual 3.3 (2016-01) 3

VRE1 volume flow controllers• satisfythehygiene requirementsaccordingtoVDI6022-1,VDI3803-1,DIN1946-4, DINEN13779,SWKIVA104-01,SWKI99-3,ÖNORMH6020andÖNORMH6021.

• are resistant to microbes,andthereforedo not promote the growth of micro-organisms (fungi, bacteria).Thisreducestheriskofinfec-tionforpeopleandalsothenecessarycleaninganddisinfectionwork!

• are resistant to cleaning agents and disinfectantsandaresuitableforuseinhospitalsandsimilarfacilities!

•withEnvironmental Product DeclarationaccordingtoISO14025andEN15804:EPD-WIL-20150036-ICA1-DE.

VRE1 volume flow controllerDescription/technicaldata(1)

Size Vmin Vmax ∅d L AA DN [m³/h] [m³/h] [mm] [mm] [m²]

100 34 340 99 329 0.008 125 53 530 124 329 0.012 160 87 870 159 329 0.020 200 136 1360 199 329 0.031 250 212 2120 249 406 0.049 315 337 3370 314 456 0.078 400 543 5430 399 551 0.126

1 Ductcasing. 2 Motorised actuator M1.3 Damperbladewithintegrated

measuring cell.4 Connectionplugwithintegrated

strain relief.5 RS232interfaceforPC.6 Illuminateddisplaywithplain

textdisplays,LEDstatusdis-playsandbuttonsformakingadjustments(onlyactuatorM1).

7 Lipseal(optional).8 Acousticinsulationwithsheet

metaljacket(optional).

VRE1 volume flow controllers are maintenance-free, electronic controllers for constant and variable volume flows in ventilation and air conditioningsystems.Theycanbeinstalledinsupplyandexhaustairventilationductsandarenotpositionsensitive.Thecasingandcontrolmechanismaremadeofgalvanizedsheetsteel.Damperbladeforvolumeflowcontrol,positionedcentrallywithperipheralgasket.Stainlesssteelbearingshaftsinspecialbearingbushes.ActuatorM1withdisplay,adjustmentbuttonsandLEDstatusdisplays,M2foradjustmentonlyviaPC.Operationmodes:“Constant”,“4-point24VAC/DC”,“Variable0–10VDC”,“Variable2–10VDC”,“Variable2–8VDC”andtheoverrides“Damperbladefully open” and “Damper blade closed”. Parallel operation and sequentialcircuits.Efficiencysignalforoptimisingthefanoutputduringoperation.Theinnovativemeasurementprocedureensureshighcontrolaccuracyatallpressuresinapprox.1:10volumeflowrangesVmin to Vmaxwithonly±5%to±15%deviationfromthereferencevolumeflow.Accordingly,thevolumeflowsthroughouttheentirepressurerangearekeptconstant.• Sizes: DN100–DN400• Totalvolumeflowrange: 34–5430m³/h• Pressurecontrolrange: 20–1000Pa•Operatingvoltage: 24VAC/DC• Options •Acousticinsulationwithsheetmetaljacketontheoutside •Lipsealsonbothsides •Factorypresets⇒seepage14

•SRCductsilencer,600mmand900mmlengths

L1=40mm;fromDN≥250L1=60mm

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Control DigIn1 DigIn2 DigIn3 Terminal6 Terminal7 Terminal8

OVFmin LOW LOWOVFmid1 LOW LOW HIGHOVFmid2 HIGH LOWOVFmax HIGH HIGH

open HIGH LOWclose HIGH

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For terminal assignment ⇒seepage12

VRE1 volume flow controllerTechnicaldata(2)/operationmodes

Function of operation modes• Constant:WithVmin≤OVFconst≤Vmax, a reference volume flow is set. Thepurposeofthisistokeepthecontrollerconstant.

• Variable: WithOVFmin≥LVFmin=0.4•Vmin or OVFmin=0m³/handOVFmax≥30%Vmax, a reference volume flow range is set. Volume flows Vref canbespecifiedwithinthisrangeviareference signals U thatcanbekeptconstantbythecontroller from Vmin.

Thefollowingreferencesignalsarepossible:

0 – 10 V - IfOVFmin = 0 m³/hisset,thedamperbladeclosescompletelywithU=0

to0.4V.ThecontrolfunctionstartsfromU≥0.4VatavolumeflowLVFmin=0.4•Vmin.

- IfOVFmin > 0 m³/hisset,thecontrolfunctionstartsfromU=0Vatthisvalue–withoutclosing.

Calculating the reference volume flow Vref for the reference signal U*): Vref[m³/h]= OVFmin [m³/h]+(OVFmax[m³/h]-OVFmin [m³/h])•U[V]:10V[1]

2 – 10 V - If0V≤U<1V,thedamperbladeclosescompletely.If1V≤U≤2V, thecontrolfunctionstartswithOVFmin.

- IfOVFmin = 0 m³/hissetandU≥1V,thecontrolfunctionstartsatthe volume flow LVFmin=0.4• Vmin.

Calculating the reference volume flow Vref for the reference signal U*): Vref[m³/h] = OVFmin [m³/h]+(OVFmax[m³/h]-OVFmin [m³/h])•(U[V]-2V): 8V[2]

2 – 8 V - If9V<U≤10V,thedamperbladeopenscompletely.If8V≤U≤9V, thecontrolfunctionoperateswithOVFmax.For0V≤U≤2V,thefunctions arethesameasthosedescribedforU=2to10V.

Calculating the reference volume flow Vref for the reference signal U*): Vref[m³/h] = OVFmin [m³/h]+(OVFmax[m³/h]-OVFmin [m³/h])•(U[V]-2V):6V[3]

• 4-point With OVFmin and OVFmaxandtheintermediatevaluesOVFmid1, OVFmid2, four volume flowsbetweenVmin and Vmaxcanbesetandkeptconstant.TheselectionismadewithLOW and HIGH signals (0Vand24VAC/DC).

Open/closeoverride:ThedamperbladecanbefullyopenedandclosedwithLOW and HIGHsignals.Alloperationmodesareoverriddenduringthisprocess.

Other technical data• FlowvelocityinAA

vA=1.2–12m/s• Maximumdifferentialpressure:2000Pa

• LeaktightnessaccordingtoDINEN1751: •Casing:ClassC •Damperblade: •Class3:DN100andDN125 •Class4:DN160toDN400

• Temperatureranges • Inside +5–+60°C • Outside +5–+50°C

• Maximumhumidity80%,non-conden-sing.

• Operatingvoltage:24VAC/DC±20%• Powerconsumption: • holding: 1.2VA,0.5W• running: 3.5VA,1.5W

• Degreeofprotection IP54• Runtimefor90° approx.90s• EMCCEinaccordancewith2004/108/EC

NomenclatureV [m³/h] VolumeflowVmin [m³/h] Minimumadjustable

volume flowVmax [m³/h] Maximumadjustable

volume flowVmin to Vmax Operatingrangeof

volume flow controllerVref, OVFconst,OVFmin,OVFmax,OVF-mid1,OVFmid2 [m³/h] Reference volume flowsLVFmin [m³/h] Minimumadjustable

reference volume flowvA [m/s] FlowvelocityinAA AA [m²] Inflowcross-section

AA=p/4•DN²DpS [Pa] StaticpressuredropLWA [dB(A)] A-weightedsound

powerlevelLp [dB] SoundpressurelevelLp(A) [dB(A)] A-weightedsound

pressurelevelU [V] Referencesignal

(variablesetpointinput)

*) Volumeflowsin%Vmaxcanalsobeusedinsteadofinm³/h.⇒seeexamplesonpages6and7

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VRE1 volume flow controllerActualvolumeflow/efficiencysignalforoptimisingthefanoutputduringoperation

Output signal AOut2: Efficiency signal

Output signal AOut1: Actual volume flow Vact

Volumeflowcontrollersshouldbeoperatedsothattheyreduce the volume flow slightly.Theyshouldbeopenedaswideaspossible.Thesmallertheresultingpressuredropsare,themoreenergyefficienttheventilationandairconditioningsystemwillbewheninoperation.Alowefficiencysignal–efficiency→0%–meansthatthevolumeflowcontrollerisoperatingwithahighpressuredropandisrestrictingtheflowconsiderably.Thesystemoperatingpressurecouldbelessand the fancouldbeoperatingata lower speed.Theefficiencysignalshouldideallybehigh,efficiency → 90%. The volume flow controller will then have an optimum operatingpressure in terms of energy efficiency. However, up to 95% isadvisable in order to ensure that sufficient air distribution andpressurestabilityismaintainedinthesystem.

Fan control with efficiency optimisationExample:InaDDCcontrolsystem,theefficiencysignalsofallvolumeflowcontrollersareanalysedandthespeedofthefanadjustedaccordinglyuntilacontrollershowsahigherefficiencysignal.Theefficiency signaltakesthevolumeflow,pressuredropanddamperbladepositionintoaccount.

Ifthepressureupstreamofthevolumeflowcontrollerisinsufficient,becausethefanoutputisnothighenoughforexample,nDefappearsonthedisplay.AOut1thenremainsatthepreviousvalue.

• 0–10Voutputsignalsandtheaboveformulas[1a],[1b]and[4]areusedinconstantmodeand4-pointmode.• Ifacontrollerreceivesaclose/opensignalinvariablemodeviathereferencesignalUorviaanoverride,theoutputsignalsfortheactualvolume

flow AOut1 and for efficiency AOut2are0Vor10Vrespectively;close/openappearsonthedisplay.

For external volume flow display and as reference signal for sequential circuits, the output signalAOut1which isproportional to the actual volume flowVact is available atoutput1,terminal3.Irrespectiveofthesettingsatthevolumeflowcontroller,thesignalproducedisproportionaltothemaximumvolumeflowVmaxandreferencesignalUat:0–10V: Vact[m³/h] = Vmax[m³/h]•AOut1[V]:10V [1a]

AOut1[V] = 10V•Vact[m³/h]: Vmax[m³/h] [1b]

2–10V: Vact[m³/h] = Vmax[m³/h]•(AOut1[V]-2V):8V [2a] AOut1[V] = 2V+8V•Vact[m³/h]: Vmax[m³/h] [2b]

2–8V: Vact[m³/h] = Vmax[m³/h]•(AOut1[V]-2V):6V [3a] AOut1[V] = 2V+6V•Vact[m³/h]: Vmax[m³/h] [3b]

Volumeflowsin[%Vmax]canalsobeusedinsteadofin[m³/h].

TheanaloguevoltagesignalAOut2isavailableatoutput2,terminal4,for improving the energy efficiency of the fan output.DependingonthesettingofthereferencesignalU,theefficiencyisasfollows:0–10V: Efficiency[%]= 100%•AOut2[V]: 10 V [4]

2–10V: Efficiency[%]= 100%•(AOut2[V]-2V):8V [5]

2–8V: Efficiency[%]= 100%•(AOut2[V]-2V): 6 V [6]

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VRE1 volume flow controllerStand-aloneoperation,ParalleloperationandMaster/Slavesequentialoperation,examples(1)

WithStand-alone operation,thevolumeflowcontrollerissettooneofthepossibleoperationmodes.WithParallel operation,thisaffectstwoormore.Thereferencesignalsarealwaysidenticalandappliedelectricallyeitherindividuallyorinparalleltoterminal5orterminals6to8.Whenconnectedinparallel,controllersoperateindependentlyofoneanother.

Reference volume flows OVFmin, OVFmax, OVFmid1, OVFmid2canbeadjustedindependentlyofoneanother,andaccordingtothesizeandoperationmodesofthecontroller.Ifchangesaremadetoonecontrollerthisdoesnotaffecttheothers.

WithMaster/Slave sequential operation,theactualvolumeflowVactofonecontrollercontrolsthereferencevolumeflow Vrefofanother.TheoutputsignalAOut1 atterminal3ofthecontrollingcontroller(Master)isfedasreferencesignal Alntoterminal5ofthecontrollerbeingcontrolled(Slave).If“Variable0–10V”,“Variable2–10V”or“Variable2–8V”issetattheMaster,thesamemodesmustbesetattheSlave.If“Constant”or“4-point”issetattheMaster,"Variable0–10V"mustbesetattheSlave.InthiscaseitisadvisabletosetOVFmin=0%Vmax and OVFmax=100%VmaxattheSlave;However,OVFmax≥30%Vmaxcanalsobeset.

Example 1:Stand-alone operation of volume flow controller and Parallel operation with identical volume flow.If the operation mode 2–8V is set at the controllers, the controlrange is controlled with U=2to8V as reference signal at Aln. WithOVFmin=35%Vmax and OVFmax=70%Vmax, a reference volume flow isspecifiedaccording topage4, formula [3].WithU=2Vas referencesignal at Aln, it is Vref = 35%+(70%-35%)•(2V-2V): 6V = 35%Vmax.

WhenU=5.2Visselectedasreferencesignalbetween2and8V: Vref = 35%+(70%-35%)•(5.2V-2V): 6V = 54%VmaxWithU=8Vasthelargestreferencesignal: Vref = 35%+(70%-35%)•(8V-2V): 6V = 70%Vmax

Example 2:Parallel operation of volume flow controllers with constant volume flow differential

Example 3:Parallel operation of volume flow controllers with proportionally-equal volume flow differential

Iftheoperationmode2–8Vissetatthecontrollers,thecontrolrangeiscontrolledwithU=2to8VasreferencesignalatAln.

With OVFmin=35%Vmax and OVFmax=70%Vmax at the first controller, areferencevolumeflowisthenspecifiedaccordingtopage4,formula[3].WithU=5.2V,forexample,thisisapossiblereferencesignalbetween2and8V: Vref = 35%+(70%-35%)•(5.2V-2V): 6V = 54%VmaxIfaconstantvolumeflowwhichisalways12%loweristobeachievedatthesecondcontroller,thesettingsOVFmin=23%Vmax and OVFmax=58%Vmax mustbespecifiedatthisone.WithU=5.2V, Vref = 23%+(58%-23%)•(5.2V-2V): 6V = 42%Vmax

Iftheoperationmode0–10Vissetatthecontrollers,thecontrolrangeiscontrolledwithU=0to10VasreferencesignalatAln.

WithOVFmin=0%Vmax and OVFmax=100%Vmax at the first controller, areferencevolumeflowisthenspecifiedaccordingtopage4,formula[1].WithU = 4V,forexample,thisisapossiblereferencesignalbetween0and10V: Vref = 0%+(100%-0%)•4V: 10V = 40%VmaxIfaconstantvolumeflowwhichisalways40%loweristobeachievedatthesecondcontroller,thesettingsOVFmin=0%Vmax and OVFmax=60%Vmax mustbespecifiedatthisone.WithU=4Vontheotherhand Vref = 0%+(60%-0%)•4V: 10V = 24%Vmax

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VRE1 volume flow controllerStand-aloneoperation,ParalleloperationandMaster/Slavesequentialoperation,examples(2)

Nomenclature⇒seepage4

Example 4: Master/Slave sequential operation to volume flow controller with identical volume flow

Example 5: Master/Slave sequential operation for volume flow controller with identical proportionally-equal volume flow

IftheactualvolumeflowattheMasterdoesnotreachthereferencevolumeflow,theSlavefollowstheactualvolumeflow!⇒seeexample2!

Theoperationmodes2–8VaresetattheMaster and Slave.TheMasteris set to OVFmin=35%Vmax and OVFmax=70%VmaxandactivatedwithU=2to8V.WhenU =6.7V,accordingtopage4,formula[3]: Vref = 35%+(70%-35%)•(6.7V-2V):6V= 62%Vmax

WhenVact=Vref, thecorrespondingoutput signalaccording topage5,formula[3b],is: AOut1 = 2V+6V•62%: 100% = 5.7V

Thisvoltage isspecifiedby theMasteras referencesignalAln to theSlaves.OVFmax=30to100%Vmaxcanbevariablyadjustedatthese.

If OVFmax = 100% Vmax is set at Slave 1, according to page 4,formula[3]: Vref = 0%+(100%-0%)•(5.7V-2V):6V = 62%Vmax

IfOVFmax=60%Vmax is set at Slave 2,accordingtopage4,formula[3]: Vref = 0%+(60%-0%)•(5.7V-2V):6V = 37%Vmax

Theoperationmodes0–10Vare set at theMaster and Slave. TheMasterIsthencontrolledwithU=0to10V.ForOVFmin=35%Vmax and OVFmax=70%Vmaxaswellaswithe.g.U =7.6Vaccordingtopage4,formula[1]: Vref = 35%+(70%-35%)•7.6V: 10V = 62%Vmax

WithVact=Vref,theoutput signalaccordingtopage5,formula[1b]is: AOut1 = 10V•62%: 100% = 6.2V

ThisvoltageisspecifiedbytheMasterasreferencesignaltotheSlaveatAlnwhereOVFmax=30to100%Vmaxcanbevariablyadjusted.

IfOVFmax=100%VmaxissetattheSlave,accordingtopage4,formula[1]: Vref = 0%+(100%-0%)•6.2V: 10V = 62%Vmax

Volume flow V [m³/h]


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VRE1 volume flow controllerSoundpowerlevelinsidetheconnectingduct–flownoise–(1)

SizeDN100 SizeDN125

SizeDN160 SizeDN200

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VRE1 volume flow controllerSoundpowerlevelinsidetheconnectingduct–flownoise–(2)

SizeDN250 SizeDN315

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Furtherexample⇒seepage11

Example:Specified: Size DN250 Volumeflow V = 1200m³/h Flow velocity vA = 6.8 m/s Staticpressuredrop DpS= 260PaResult: Flownoise Soundpowerlevel LWA= 63dB(A)

• In the nomograms, the sound power level inside theconnectingductiscalculatedasanA-weightedoveralllevelLWA.

CorrespondingoctavesoundpowerlevelsLW-OctareobtainedfromtheWildeboerdimensioningsoftwareforeverysizeandall operating points; likewise for the designwith additionalSRCductsilencers.

• WithSRCductsilencers,thesoundpowerlevelsLWAcanbereducedbyupto31dB.

Important:Thesound levels indicated in thenomogramsaresound power levels!Thevaluesrepresentthesoundenergyintroducedintotheductsystem.Theyshouldbeappliedforacousticcalculations,e.g.whenaddingsoundattenuators.

Inotherdocuments,sound pressure levelsLporLpA are frequently specified instead of sound power levels. They contain standardizedattenuations of up to 18 dB. This distinctionmust be observed whencomparingnumericvalues.Furthermore,theextentoftheseattenuationsonlybecomesclearoncetheducts,baffles,branchesandspaceshaveactuallybeenconnected.



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VRE1 volume flow controllerSoundpowerleveloutsidetheconnectingduct–radiatednoise–(1)

SizeDN100 SizeDN125

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VRE1 volume flow controllerSoundpowerleveloutsidetheconnectingduct–radiatednoise–(2)

SizeDN250 SizeDN315

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ExampleSpecified: Size DN250 Volumeflow V = 1200 m³/h Flow velocity vA = 6.8 m/s Staticpressuredrop DpS = 260 PaResult: Flownoise⇒seeexampleonpage9 Soundpowerlevel LWA = 63 dB(A)Result: Radiatednoise Soundpowerlevel1) LWA = 47.5 dB(A)

Furtherexample⇒seepage9

1) Theaveragesound pressure level in the room withthefollowingequipmentis

• 26 dB less with acoustic insulation • 8 dB less without acoustic insulation

thanthesoundpowerlevelLWAspecifiedinthenomograms. However, the soundattenuationof theacoustic insulation

specifiedonlyappliesifconnectedventilationductsarealsoinsulated (isolated) accordingly.

Thesoundpressurelevelcanbefurtherreducedbyonsiteacousticinsulationmeasures(suspendedceilings,highroomattenuation).

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:Connectionsareabsolutelyrequired.:Connectionsareoptional.

VRE1 volume flow controllerElectricalconnections/terminalassignment

Constantvolumeflowcontrol

4-pointvolumeflowcontrol

Variablevolumeflowcontrol0–10V,2–10V,2–8V

Variablevolumeflowcontrol0–10V,2–10V,2–8VConnectioninparallel

8 DigIn3 → Gateinput3,AC/DC7 DigIn2 → Gateinput2,AC/DC 6 DigIn1 → Gateinput1,AC/DC 5 AIn → Analogueinput1,DC → Variablesetpointinput 4 AOut2 → Analogueoutput2,DC → Efficiency signal 3 AOut1 → Analogueoutput1,DC → Actualvolumeflow2 GND → -1 24 V → +

Terminal assignment of connection plug

4-pointvolumeflowcontrol(Open/close)override

Electrical connections

• Accuracyofanalogueinputsandoutputs:±1%fromendvalue• Allinputsandoutputsarenotelectricallyisolated.• DigIn: 115µA@24VDC(HIGH>19.1VDC,LOW<12.5VDC) 540µA@24VDC(HIGH>13.8VDC,LOW<9.2VDC)

• AIn: 50µA@10VDC(delay:upto15s)• AOut: max.1mA@10VDC(load>10kW;short-circuitproof)

Variablevolumeflowcontrol0–10V,2–10V,2–8V

Sequentialcircuit

24VAC/DCsupplyvoltage

damper blade axis of controller

damper blade axisof controller


• VRE1 volume flow controllers are designed for ventilation and airconditioningsystems.Suitableairpurityisaprerequisiteforoperation.

• VRE1 volume flow controllers are adjusted for the entirecontrollablevolumeflowrangefromVmin to Vmax andachievethespecifiedcontrolaccuracyinthisrange.Largerdeviationscanoccurwithlowvolumeflows,especiallywithsmallsizes.

• FortheVRE1volumeflowcontrollertoworkefficiently,theflowsmustbeextensivelyundisrupted.Thestraightinletandoutletsectionsshownasexamplesmustbeadheredtoasminimumrequirementdownstreamofflowdisruptionpoints(e.g.firedampers,reductions,bends,branches);longerinletsections may be required where several disruption pointsoccur consecutively. Otherwise significant nonconformitiesmustbeanticipated.

• VRE1volumeflowcontrollersandSRCductsilencersaredeliveredindividually.Assemblyonsite.

• VRE1volumeflowcontrollersareopenedtoadamperbladepositionofroughly45°atthefactoryandaresuppliedwithastandardsettingorcustomer-specificpresetting. ⇒seepage14.

Changescanbemadeonsiteatthe: • Volume flow controller with the actuator M1 with the

adjustmentbuttonsandplaintextdisplayintheilluminateddisplay.

• PCwithsoftwaresuppliedviatheRS232interface.

Canberesettothedeliverycondition.• Onceinstalledinthecircularventilationduct,theVRE1volume

flowcontrolleridentifiesitsinstallationpositionautomaticallyandoptimisesitscontrolaccuracyaccordingly.Iftheinstallationissubsequentlychanged,thisoptimisationcanbecarriedoutonceagainbyswitchingthepowersupplyoffandbackon.

If no systemoperating pressure is present, the device isopened to aminimumdamper blade setting anglewhichdepends on the set point. Once the necessaryminimumpressurelossorvolumeflowhasbeendetected,theVRE1volumeflowcontrollergoesintooperation. ⇒forlimitationsseepages8and11

• Toensurelastingfunctionalityandleaktightness,thedevicesmustbeinstalledincircularventilationductsfreeoftension.The assembly instructions are enclosed with the VRE1volume flow controllers.

• Theactuatorisoverload-proof.Intheeventofapowerfailure,itremainsinthecurrentposition.Thesettingsareretained.

• Cablesshouldbe routedseparately topowerandcontrollines, or be a sufficient distance from them. Wheneverpossible,theyshouldhavearadialformandberoutedovertheshortestpossibledistancetoavoidloops.

• The signal inputs and outputs of the VRE1 volume flowcontrollersarenotpotential-free.The localpotential relati-onshipsmustbechecked.Measurestopreventcorruptingorharmfulequalisingcurrentsmayberequired.

VRE1 volume flow controllerInstallationinstructions

Figure4:Installationdownstreamofdisruption point,e.g.bend Observeorientationofdamperbladeaxis!

Figure6: Installationdownstreamofdisruption point,e.g.T-pieces

Figure3: Installationdownstreamofdisruption point,e.g.widenings

Figure1:Installationdownstreamofdisruption point,e.g.firedamper

Figure2:Installationdownstreamofdisruption point,e.g.reduction

Figure5: Installationdownstreamofdisruption point,e.g.bend Observeorientationofdamperbladeaxis!


DN size100/125/160/200/250/315/400

⇒ seepages2and3Actuators- 24VAC/DCactuator - standard - M1

⇒seepages2to4

- 24VAC/DCactuator M2 withoutdisplay,LEDsandadjustmentbuttons.SettingsofPCwithRS232interface.

Option: Lip seal withtwolipseals LD ⇒seepages2and3

Option: Acoustic insulation withacousticinsulation DS ⇒seepages2and3

Option: Presets1)

- Operation mode - Constant KO - 4-point 4P - Variable,0V–10V - standard - 01 - Variable,<2 V,2V–10V 21 - Variable,<2 V,2V–8V,> 8V 28

- Reference volume flowinm³/h - Constant reference volume flow OVFconst=

Standard:45%VmaxforoperationmodeKO

- Minimum reference volume flow OVFmin= Standard:30%Vmaxforoperationmode4P,01,21,28

- 1st average reference volume flow OVFmid1= Standard:45%Vmaxforoperationmode4P

2nd average reference volume flow OVFmid2= Standard:60%Vmaxforoperationmode4P

- Maximum reference volume flow OVFmax= Standard:75%Vmaxforoperationmode4P,01,21,28

⇒seepage4

1) Controllersarepresetas"standard"atthefactory. Customer-specificsettingsfortheoperationmodeandreferencevolumeflowarepossibleasfactory pre-settings.

VRE1 volume flow controllerOrderdata

VRE1 - - - - - -

withduct silencer (attachmentonsite)

SRC600(uptoDN315)SRC900⇒seepages2and3

Observethefollowinglimitvaluesforthisin

Operationmode

Constant: Vmin≤OVFconst≤Vmax

Variable: 0m³/hor0.4•Vmin≤OVFmin<OVFmax

and

30%Vmax≤OVFmax≤Vmax

4-point: Vmin≤OVFmin<OVFmid1<OVFmid2<OVFmax≤Vmax

Download from www.wildeboer.de:• PCsoftwareformakingonsitechangestothepre-settings• Hygienecertificate• Hygieneinstructionsfordisinfection

Entriesdependonoperationmode!


Maintenance-free, electronic volume flow controller for variable and constant volume flows. Circular design for installation in circular ventilation ducts for supply and exhaust air ventilation and air conditioning systems. Duct casing and centrally supported damper blade made of galvanised sheet steel, stainless steel bearing shafts in special bearing bushes. With peripheral seal on the damper blade to shut off the circular ventilation duct.

Measuring device integrated into the damper blade. High degree of control accuracy in a total volume flow range of 1:10. The volume flow must be kept constant at variable pressures between 20 and 1000 Pa with a maximum deviation of ±5% to ±15%.

Maintenance-free 24 V actuator with integrated electrical connection and strain relief. Constant, Variable or 4-point operation modes can be set via illuminated display with plain text display or using software via an RS232 interface. LED status displays for indication of controller operation statuses. Adjustable operation modes 0 – 10 V, 2 – 10 V and 2 – 8 V for variable operation. Higher-level override for opening and closing the damper blade. Analogue output signals for the actual volume flow and for efficiency in order to optimise the fan output. Equipment for parallel and sequential operation of several volume flow controllers.

Leak tightness class C for the casing and leak tightness class 3 or 4 for the damper blade, each according to DIN EN 1751. Certificate of conformity as proof of compliance with the hygiene requirements according to VDI 6022-1, VDI 3803-1, DIN 1946-4, DIN EN 13779, SWKI VA104-01, SWKI 99-3, ÖNORM H6020 and ÖNORM H6021. With Environmental Product Declaration certificate according to ISO 14025 and EN 15804.

With acoustic insulation, with lip seals.

........ units Volume flow: from ......... m³/h

to ......... m³/h Pressure drop: ......... Pa Maximum sound power level Flow noise ......... dB(A)

including SRC duct silencer Radiated noise ......... dB(A) Manufacturer: WILDEBOER®

Type: VRE1 Size: DN ....... Complete with attachments deliver: .......... install: .......... ..........

........ units duct silencer SRC 600 / 900 deliver: .......... install: .......... ..........

Select texts not highlighted in bold as required!

VRE1 volume flow controllerSpecificationtext

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-mail: [email protected]

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Documents

Maintenance-free, electronic VRE1 volume flow controller€¦ · for ventilation and air conditioning systems. Versatile. Sizes DN 100 to DN 400. Operatingvoltage: 24 V AC/DC. Operationmodes: