Munters ML420, ML690, MLT1400, MLT800, ML1100 User Manual

Originalinstructions

Usermanual

ML420,ML690,MLT800

ML1100,ML1350,MLT1400

Desiccantdehumidier

190TGB-1035-H1604©MuntersEuropeAB2016

Importantuserinformation

Intendeduse

Muntersdehumidiersareintendedtobeusedforthe
dehumidicationofair.Anyotheruseoftheunit,or
usewhichiscontrarytotheinstructionsgiveninthis
manual,cancausepersonalinjuryanddamagetotheunit
andotherproperty.

Nomodicationoftheunitisallowedwithoutprior
approvalbyMunters.Attachmentorinstallation
ofadditionaldevicesisonlyallowedafterwritten
agreementbyMunters.

Warranty

Thewarrantyperiodisvalidfromthedatetheunit
leftourfactory,unlessotherwisestatedinwriting.
Thewarrantyislimitedtoafreeexchangeofpartsor
componentswhichhavefailedasaresultofdefectsin
materialsorworkmanship.

Allwarrantyclaimsmustincludeproofthatthe
faulthasoccurredwithinthewarrantyperiodand
thattheunithasbeenusedinaccordancewiththe
specications.Allclaimsmustspecifytheunittypeand
fabricationnumber.Thisinformationisstampedonthe
identicationplate,seesectionMarking.

Itisaconditionofthewarrantythattheunitforthefull
warrantyperiodisservicedandmaintainedbyaqualied
MuntersengineerorMuntersapprovedengineer.
Accesstospecicandcalibratedtestequipmentis
necessary.Theserviceandmaintenancemustbe
documentedforthewarrantytobevalid.

AlwayscontactMuntersforserviceorrepair.Operating
faultscanoccuriftheunitismaintainedinsufcientlyor
incorrectly.

Safety

Informationaboutdangersareinthismanualindicated
bythecommonhazardsymbol:

W

ARNING!

W W

ARNING! ARNING!

Indicatesapossibledangerthatcanleadtopersonalinjury .

CA

UTION!

CA CA

UTION! UTION!

Indicatesapossibledangerthatcanleadtodamagetothe

unitorotherproperty ,orcauseenvironmentaldamage.

NOTE!Highlightssupplementaryinformationforoptimal

useoftheunit.

ConformitywithDirectives

Thedehumidierisinconformitywiththeessential
safetyrequirementsoftheMachineryDirective
2006/42/EC,andinconformitywiththeprovisionsof
theEcodesignDirective(ErP)2009/125/EC,andof
theEMCDirective2004/108/EC.Thedehumidieris
manufacturedbyanorganizationcertiedaccordingto
ISO9001andISO14001.

Copyright

Thecontentsofthismanualcanbechangedwithout
priornotice.

NOTE!Thismanualcontainsinformationwhichis

protectedbycopyrightlaws.Itisnotallowedtoreproduceor

transmitanypartofthismanualwithoutwrittenconsentfrom

Munters.

Pleasesendanycommentsregardingthismanualto:

MuntersEuropeAB
TechnicalDocumentation
P.O.Box1150
SE-16426KISTASweden
e-mail:[e-mail]

iiImportantuserinformation190TGB-1035-H1604

Tableofcontents

Importantuserinformation...............ii

Intendeduse...........................

Warranty...............................

Safety..................................

ConformitywithDirectives............

Copyright..............................

Tableofcontents...........................iii

1Introduction.................................1

1.1Aboutthismanual.....................

1.2Unintendeduse........................

1.3Safetyandcautions...................

1.4Markings...............................

1.5Supervisionofoperation..............

1.6Faultindications.......................

2Dehumidierdesign.......................4

2.1Productdescription...................

2.2Functiondescription..................

2.3Maincomponents.....................

3Transport,inspectionandstorage.......6

3.1Transport..............................

3.2Inspectionofdelivery..................

3.3Storingtheequipment................

4Installation...................................7

4.1Safety..................................

4.2Siterequirements.....................

4.3Foundation............................

4.4Mirrorhandedductconnections......

4.5Ductinstallation.......................

4.5.1Generalrecommendations...

4.5.2Ductforoutdoorairinlet.......

4.5.3Ductforwetairoutlet...........

4.6Precautionarymeasuresforunitswith

LIdesiccantrotor......................

4.7Electricalconnections................

4.8Externalhumiditysensor.............

4.9Gasreactivation(ML1100units

only)....................................

5Commissioning.............................15

5.1Settingsbeforestart-up...............

5.1.1Continuousprocessairfan

operation.......................

5.1.2Single-stagehumiditysensor.

ii

ii

ii

ii

6Operation....................................18

ii

1

1

1

3

3

3

4

4

5

6

6

6

7

7

8

8

9

9

12

12

13

13

13

14

15

15

7Serviceandmaintenance.................24

8Faulttracing.................................28

9Technicalspecication....................31

10Scrapping....................................40

5.1.3Two-stagehumiditysensor...

5.1.4Remotefaultindication........

5.2Pre-startchecks.......................

5.3Airowcheckandadjustment........

6.1General................................

6.2Quickstop..............................

6.3Beforestarting.........................

6.4Operatorpanel........................

6.5RH98operatorpanel..................

6.6Operatingtheunit.....................

6.6.1Manualmode..................

6.6.2Automaticmode–humidity

sensorconnected..............

6.6.3Automaticmode-RH98or

VariDry(option)................

7.1Safety..................................

7.2General................................

7.3Serviceoptions........................

7.4Extendedwarranty....................

7.5Cleaning...............................

7.6Serviceandmaintenanceschedule..

7.7Filterchange...........................

8.1General................................

8.2Safety..................................

8.3Faulttracinglist........................

9.1Dimensionsandservicespace.......

9.2Capacitydiagrams....................

9.3Technicaldata.........................

9.4Sounddata.............................

9.4.1SounddataML420............

9.4.2SounddataML690............

9.4.3SounddataMLT800...........

9.4.4SounddataML1100...........

9.4.5SounddataML1350...........

9.4.6SounddataMLT1400..........

15

15

15

16

17

18

18

18

19

21

21

21

22

22

24

24

24

25

25

25

27

28

28

29

31

32

34

36

36

37

37

38

38

39

190TGB-1035-H1604Tableofcontentsiii

Appendix1Options.............................41

1.1General................................

1.2Runningtimemeter...................

1.3Rotorstopalarm.......................

1.4Blockedlteralarm....................

1.5Filterbox-M5andF7..................

1.6Humiditycontrolsystem..............

1.6.1Introduction....................

1.6.2Transmitter.....................

1.6.3Controlunit.....................

41

41

41

41

41

42

42

42

2ContactMunters............................49

1.6.4Setpointsandcontrol

parameters.....................

1.6.5Display/changesetpointfor

relativehumidity...............

1.6.6Display/changeother

parameters.....................

1.6.7Processalarms................

42

43

44

44

47

ivTableofcontents190TGB-1035-H1604

DehumidierML420-MLT1400

1Introduction

1.1Aboutthismanual

Thismanualiswrittenfortheuserofthedehumidier.Itcontainsnecessaryinformationforhowtoinstall
andusethedehumidierinasafeandefcientway.Readthroughthemanualbeforethedehumidieris
installedandused.

ContactyournearestMuntersofceifyouhaveanyquestionsregardingtheinstallationortheuseofyour
dehumidier.

Thismanualmustbestoredinapermanentlocationclosetothedehumidier.

1.2Unintendeduse

■Thedehumidierisnotintendedforoutdoorinstallation.

■Thedehumidierisnotintendedforuseinclassiedareaswhereexplosionsafetycompliantequipment

isrequired.

■Thedehumidiermustnotbeinstallednearanyheatgeneratingdevicesthatcancausedamagetothe

equipment.

1.3Safetyandcautions

Everymeasurehasbeentakeninthedesignandmanufactureofthedehumidiertoensurethatitmeetsthe
safetyrequirementsofthedirectivesandstandardslistedintheECDeclarationofConformity.

Theinformationinthismanualshallinnowaytakeprecedenceoverindividualresponsibilitiesorlocal
regulations.

Duringoperationandotherworkwithamachineitisalwaystheresponsibilityoftheindividualtoconsider
thefollowing:

■Thesafetyofallpersonsconcerned.

■Thesafetyoftheunitandotherproperty.

■Theprotectionoftheenvironment.

ThetypesofdangersthatareindicatedinthismanualaredescribedinthesectionImportantuserinformation.

190TGB-1035-H1604Introduction1

DehumidierML420-MLT1400

W

ARNING!

W W

ARNING! ARNING!

-Theunitmustnotbesplashedwithorimmersedinwater.

-Theunitmustneverbeconnectedtoavoltageorfrequencyotherthanthatforwhichitwasdesigned.Refertothe

identicationplate.Linevoltagethatistoohighcancauseanelectricalshockhazardanddamagetotheunit.

-Donotinsertngersoranyobjectsintotheairvents.

-Allelectricalinstallationsmustbecarriedoutbyaqualiedelectricianandinaccordancewithlocalregulations.

-Thedehumidiercanrestartautomaticallyafterapowercut.Alwayssetandlockthemainpowerswitchinthe

OFFpositionbeforecarryingoutanyservicework.

-Useonlyapprovedliftingequipmenttopreventpersonalinjuryanddamagetotheequipment.

-AlwayscontactMuntersforserviceorrepair.

2Introduction190TGB-1035-H1604

DehumidierML420-MLT1400

Reg.luft
Reac.air
Reg.Luft

Air de regeneration

'''

Processluft
Process air
Prozessluft
Air a traiter

`

Våtluft
Wet air
Nassluft
Air humide

Torrluft
Dry air
Trockenluft
Air sec

3

1

4

5

2

3

1.4Markings

Figure1.1Identicationplateandmarkings

Figure1.2Identicationplate,example

1.Unitidenticationplate

4.Processairinlet

Figure1.3Labelsforairinletsandoutlets

2.Dryairoutlet5.Reactivationairinlet

3.Wetairoutlet

Explanationof"Fabr.no"ontheidenticationplate:

09=yearofmanufacture,19=weekofmanufacture,190XXX=articlenumber,XXXXX=serialnumber

1.5Supervisionofoperation

Thedehumidieriscontrolledandmonitoredusingtheoperatorpanellocatedonthefrontoftheunit.

1.6Faultindications

Faultsareclearlyindicatedontheoperatorpanel,seesection6.4,Operatorpanel.

Alarmsrelatingtorelativeairhumidityaregiveninthedisplayofthehumiditycontrolsystem(ifinstalled),
seeappendix1.6,Humiditycontrolsystem.

190TGB-1035-H1604Introduction3

DehumidierML420-MLT1400

2

4

3

1

2Dehumidierdesign

2.1Productdescription

ThedesiccantdehumidiersintheMLserieshavebeendevelopedtoeffectivelydehumidifytheairin
environmentsrequiringlowairhumidity.

Thedehumidierisequippedwithanencapsulatedrotorunit.Therotorcasingisconstructedofdurable
thermosetplasticandcontainsisolatedsectionsthatprovideaprecisebalanceforthedehumidication,
reactivationandheatrecoveryairows.

ThedehumidierismanufacturedinaccordancewithuniformEuropeanstandardsandestablished
requirementsforCE-marking.

2.2Functiondescription

1.Processair

2.Dryair

3.Reactivationair

4.Wetair

Figure2.1Internalairows

Thedesiccantrotoristheadsorptiondehumidifyingcomponentintheunit.Therotorstructureis
comprisedofalargenumberofsmallairchannels.

Thedesiccantrotorismadeofacompositematerialthatishighlyeffectiveinattractingandretainingwater
vapour.Therotorisdividedintwozones.Theairowtobedehumidied,processair,passesthroughthe
largestzoneoftherotorandthenleavestherotorasdryair.Sincetherotorrotatesslowly,theincomingair
alwaysmeetsadryzoneontherotor,thuscreatingacontinuousdehumidicationprocess.

Theairowthatisusedtodrytherotor,reactivationair,isheated.Thereactivationairpassesthrough
therotorintheoppositedirectiontotheprocessairandleavestherotoraswetair(warm,moistair).This
principleenablesthedehumidiertoworkeffectively ,evenatfreezingtemperatures.

4Dehumidierdesign190TGB-1035-H1604

DehumidierML420-MLT1400

11

1

4

5

6

8

9

2

16

3

12

14

13

15

10

7

2.3Maincomponents

Figure2.2Maincomponents

1.Lowerrotorcover9.Drivemotor

2.Roller,beltguide10.Pulley,beltdrive

3.Drivebelt11.

4.Rotor12.Reactivationairimpeller

5.

Sealingring,rotor

6.Upperrotorcover14.

7.

Electricalcontrolpanel15.Processairimpeller

8.Reactivationheater16.

13.

Reactivationairlter

Reactivationfanmotor

Processfanmotor

Processairlter

NOTE!TheML420unithasonlyonefanmotorthatisplacedbetweentheprocessandreactivationimpeller.

190TGB-1035-H1604Dehumidierdesign5

DehumidierML420-MLT1400

3Transport,inspectionandstorage

3.1Transport

Thedehumidierisdeliveredonapalletandmustbehandledcarefully .Allpaneldoorsontheunitmustbe
closedduringtransport.Providedthatthedehumidierisstillsecuredtoitsdeliverypallet,itcanbemoved
usingafork-lifttruck.

W

ARNING!

W W

ARNING! ARNING!

Movethedehumidiercarefullyasthereisariskofthedehumidiertippingover.

Figure3.1Correctlengthonforkliftarms

Weightofthedehumidiercanbefoundinsection9.1,Dimensionsandservicespace.

3.2Inspectionofdelivery

■Doaninspectionofthedeliveryandcomparewiththedeliverynote,orderconrmationorother

deliverydocumentation.Makesurethateverythingisincludedandnothingisdamaged.

■ContactMuntersimmediatelyifthedeliveryisnotcompleteordamagedinordertoavoidinstallation

delays.

■Removeallpackagingmaterialfromtheunit,andmakesurethatnodamagehasbeenmadeduring

transportation.

■AnyvisibledamagemustbereportedinwritingtoMunterswithin3daysandpriortoinstallationof

theunit.

■Discardthepackagingmaterialaccordingtolocalregulations.

3.3Storingtheequipment

Followtheseinstructionsifthedehumidieristobestoredpriortoinstallation:

■Placethedehumidierinanuprightpositiononahorizontalsurface.

■Re-usethepackagingmaterialtoprovideprotectionfortheunit.

■Protectthedehumidierfromphysicaldamage.

■Storethedehumidierundercoverandprotectitfromdust,frost,rainandaggressivecontaminants.

6Transport,inspectionandstorage190TGB-1035-H1604

DehumidierML420-MLT1400

4Installation

4.1Safety

W

ARNING!

W W

ARNING! ARNING!

-Theunitmustnotbesplashedwithorimmersedinwater.

-Theunitmustneverbeconnectedtoavoltageorfrequencyotherthanthatforwhichitwasdesigned.Refertothe

identicationplate.Linevoltagethatistoohighcancauseanelectricalshockhazardanddamagetotheunit.

-Donotinsertngersoranyobjectsintotheairvents.

-Allelectricalinstallationsmustbecarriedoutbyaqualiedelectricianandinaccordancewithlocalregulations.

-Thedehumidiercanrestartautomaticallyafterapowercut.Alwayssetandlockthemainpowerswitchinthe

OFFpositionbeforecarryingoutanyservicework.

-Useonlyapprovedliftingequipmenttopreventpersonalinjuryanddamagetotheequipment.

-AlwayscontactMuntersforserviceorrepair.

CA

UTION!

CA CA

UTION! UTION!

Thewetairductmustalwaysbeinsulatedwhenthereisariskoffreezing.Condensationbuildsupeasilyonthe

insideoftheductbecauseofthehighmoisturecontentofthewetairleavingthedehumidier.

CA

UTION!

CA CA

UTION! UTION!

Thedehumidierhasbeendesignedtooperateatspecicprocessairowscorrespondingtothefansizes

installed.

4.2Siterequirements

Thedehumidierisonlyintendedforindoorinstallation.Avoidinstallingthedehumidierinadamp
environmentwherethereisariskofwaterenteringtheunitorinaverydustyenvironment.Ifindoubt,
contactMunters.Itisimportantthattheintendedinstallationsitemeetsthelocationandspacerequirements
fortheequipmentinordertoachievethebestpossibleperformance.

Fortheunitdimensionsandservicespacerequirements,seesection9.1,Dimensionsandservicespace.

NOTE!Ifthereisaneedforreductionofvibrationsfromthedehumidier,contactMuntersforinstructions.

190TGB-1035-H1604Installation7

DehumidierML420-MLT1400

4.3Foundation

Thedehumidiermustbeinstalledonaleveloor,oronaplatformcapableofsupportingthemachine
weight.Ifthemaximumoorloadingweightisnotexceeded,specialfoundationsarenotrequired.

Whenthedehumidierhasbeeninstalled,checkthatitislevel.

Iflocalregulationsrequirethattheunitispermanentlyxedinposition,thexingholescanbeusedfor
boltingtheunittotheoor.

Figure4.1Drillingpattern

4.4Mirrorhandedductconnections

Thefrontandrearpanelsareinterchangeable,sothattheconnectionsforprocessairanddryairmaybe
situatedeitherontheleftorrightsideoftheunit.

Thedehumidiersaredeliveredwiththeprocessanddryairconnectionsontheleftsideoftheunit.If
itisrequiredtochangetheorientation,sothattheconnectionsareontherightsideoftheunit,proceed
asfollows.

W

ARNING!

W W

ARNING! ARNING!

Makesurethatthedehumidierisdisconnectedfromthemainspowerbeforechangingthepositionsofthe

processairanddryairconnections.

8Installation190TGB-1035-H1604

DehumidierML420-MLT1400

Figure4.2ChangingpanelpositionsFigure4.3Rotorstop(E)andltermonitors(F)

1.Removethetwobolts(B)securingthefrontpanelandcarefullyremovethepanel.

2.Removethetwoboltssecuringtherearpanelandcarefullyremovethepanel.

3.Removethetwobolts(A)andwasherssecuringthecontrolandtoppanels,thencarefullyremovethe
toppanel.

4.Removethecableductcovers(C),re-routethecablesandtthecontrolpanel(D)ontotheoppositeside
oftheunit.Retthecableductcovers.

5.Loosentherotorstop(E)andthetwoltermonitors(F).Removethecableties.

6.Fittherotorstopandltermonitorsontheoppositesideoftheunit.Tiethecables.

7.Fitthefront,rearandtoppanelsintheirnewpositions.

4.5Ductinstallation

4.5.1Generalrecommendations

Theconnectionsforprocessandreactivationairaredesignedinaccordancewiththerecommendationsin
ISO13351.TherectangularductconnectionscontaintappedinsertsforM8screws.

Figure4.4Ductconnections

190TGB-1035-H1604Installation9

DehumidierML420-MLT1400

Partnumber170-013448–005170-013448–004170-013448–003170-013448–002170-013448–001

A

B

L(mm)

ML420XX

ML690XX

MLT800XX

ML1100XX

ML1350XX

MLT1400XX

CA

UTION!

CA CA

UTION! UTION!

Ø100Ø125Ø160Ø200Ø250

Seesection9.1,Dimensionsandservicespace.

210210200140150

Thedehumidierhasbeendesignedtooperateatspecicprocessairowscorrespondingtothefansizes

installed.

■Theprocessairanddryairductsshouldbethesamediameter.Thesameappliestothereactivationair

andwetairducts.

■Thelengthofductworkmustbekeptasshortaspossibletominimisestaticairpressurelosses.

■Tomaintainperformance,allrigidprocessorreactivationairductworkjointsmustbeairandvapour

tight.

■Theprocessairductworkmustbeinsulatedtopreventcondensationdevelopingontheoutsideofthe

duct,wheneverthetemperatureoftheairwithintheductfallsbelowthedewpointtemperatureofthe
ambientairthroughwhichtheductworkisrouted.

■Theductsmustalwaysbeinsulatedwhenthereisariskoffreezing.

■Thewetairleavingthedehumidierwill,becauseofhighmoisturecontent,condenseontheinsideduct

walls.Byinsulatingtheducts,theamountofcondensateisreduced.

■Horizontalwetairductsmustbeinstalledwithaslightdecline(awayfromthedehumidier)todrain

awaypossiblecondensation.Suitablecondensationdrainsmustbeinstalledatlowpointsinthewet
airoutletduct,seeFigure4.7.

■Ensurethataccessforoperationandservicingisnotrestrictedwhendesigningandinstallingducting.

Formoreinformation,refertosection9.1,Dimensionsandservicespace.

■Toreducenoiseand/orvibrationbeingtransmittedalongrigidducts,goodquality,airtightexible

connectionscanbetted.

■Ductsmounteddirectlyontotheunitmustbeindependentlysupportedtominimisetheloadontheunit.

■Dampersforadjustingtheairowsmustbeinstalledinthesupplyairoutletandreactivationairinlet

ducts.Correctairowsareessentialfortheoperatingefciencyoftheunit.Forairowadjustment
instructions,seesection5.3,Airowcheckandadjustment.

■Thetotalpressuredropintheprocessandreactivationductworkmustnotexceedtheavailablepressure

ofthefansttedtothedehumidier.Fordetailsofminimumavailablestaticpressure,seesection

9.3,Technicaldata.

10Installation190TGB-1035-H1604

DehumidierML420-MLT1400

ML

Munter s

420

1

2

3

5

5

4

C

B

D

A

Figure4.5Ductsrequiredforinstallation

A.Processairinlet1.Dryairdamper

B.Dryairoutlet

C.Reactivationairinlet

D.Wetairoutlet4.Reactivationairdamper

2.Externallterbox(option)

3.Ducttransition

5.Outlet/inletduct(wirenetting)

190TGB-1035-H1604Installation11

DehumidierML420-MLT1400

4.5.2Ductforoutdoorairinlet

Whenbringingambientairfromoutdoorsintothedehumidier,theinletductopeningmustbelocated
sufcientlyhighabovegroundleveltopreventdustanddebrisfromentering.

Theductingmustbedesignedtopreventrainandsnowfrombeingdrawnintothedehumidier.Theair
inletmustbelocatedawayfrompossiblecontaminantssuchasengineexhaustgases,steamandharmful
vapours.

Topreventthewet(outlet)airfromhumidifyingthereactivation(inlet)air,theairinletforreactivationmust
belocatedatleast2mfromthewetairoutlet.

Attachawirenetwithameshwidthofapproximately10mmintheouterendoftheducttopreventanimals
fromenteringthedehumidierducting.

A.Rectangularducting

B.Roundducting

C.Wirenetting

Figure4.6Outdoorairinletdesign

4.5.3Ductforwetairoutlet

Thematerialforthewetairductmustwithstandcorrosionandtemperaturesofupto100°C.Thewetair
ductingmustalwaysbeinsulatedifthereisariskofcondensation.Thewetairleavingthedehumidierwill
easilycausecondensationontheinsideoftheductwallsduetothehighmoisturecontent.

Horizontalductsmustbeinstalledslopingdownwards(awayfromthedehumidier)todrainawaypossible
condensation.Theductslopemustbeatleast2cm/m.Inaddition,drainageholes(5mm)shouldbemadeat
lowpointsintheducttopreventwateraccumulation.

Attachawirenetwithameshwidthofapproximately10mmintheouterendoftheducttopreventanimals
fromenteringthedehumidierducting.

A.Horizontalwetairoutlet

B.Verticalwetairoutlet

C.Wirenetting

D.Downwardslope

E.Condensatedrainage

Figure4.7Wetairoutletdesign

12Installation190TGB-1035-H1604

DehumidierML420-MLT1400

4.6PrecautionarymeasuresforunitswithLIdesiccantrotor

ThestandarddeliveryisMuntershighperformancedesiccantrotorHPS(HighPerformanceSilicagel).
IfthedehumidierisdeliveredwithanLIrotor(lithiumchloride)itisimportantthattherotordoesnot
becomeloadedwithmoisturewhenthedehumidierisoff.

NOTE!Makesurethatnoairpassingthroughtherotorhasarelativehumiditygreaterthan80%.

Itisrecommendedtoinstallclosingdampersintheprocessandreactivationairinletstoavoidthatairwith
highrelativehumidityisdrawnthroughtherotorandintotheroom.

Thisisparticularlyimportantwhentheprocessairisdrawnfromoutdoors,orwhenthesystemhasbeen
ttedwithapre-cooler.

4.7Electricalconnections

W

ARNING!

W W

ARNING! ARNING!

Allelectricalequipmentconnectionsmustbecarriedoutinaccordancewithlocalregulationsandbyqualied

personnel.Riskofelectricalshock.

W

ARNING!

W W

ARNING! ARNING!

Theunitmustneverbeconnectedtoavoltageorfrequencyotherthanthatforwhichitwasdesigned.Refertothe

unitidenticationplate.

Eachunitissuppliedcompletewithalltheinternalwiringinstalledandconguredinaccordancewiththe
speciedvoltageandfrequencyontheidenticationplate.

NOTE!Thesupplyvoltagemustnotdifferfromthespeciedoperatingvoltagebymorethan+/-10%.

Forconnectiondetails,seetheidenticationplateandthewiringdiagramorsection9.3,Technicaldata.

4.8Externalhumiditysensor

ML-seriesdehumidiersarewiredsothatwhentheunitissettoAUTOmatic,itcanbecontrolledfrom
anexternallymountedhumiditysensor.

Allmodelshaveatwo-stageheater,andcanbecontrolledbyatwo-stagehumiditysensor.Thismethodis
moreefcientandallowsformoreaccuratedehumidicationcontrol.

Theelectricalconnectionsaremadeatterminalsintheelectricalcontrolpanel.Forwiringandconnection
details,seethewiringdiagram.

NOTE!Wherenohumiditysensorisconnectedtotheunit,thedehumidierwillbeoperatingatmaximumoutput

foraslongastheunitisswitchedon.

Aroomhumiditysensoristobemounted1-1.5mabovetheoor.Itmustbepositionedsothatitisnot
directlyexposedtodryairfromtheunitortohumidairowinginthroughopeningdoors.Positionitaway
fromheatsourcesanddirectsunlight.

■Thehumiditysensorconnectingcableshouldhaveaconductorareaofnotlessthan

0,75mm

■ThehumiditysensormustbedesignedsothatthecontactscloseonarisingRHtocompletethecontrol

2

andmusthaveaninsulationresistanceratinginexcessof500VAC.

circuitandstartthedehumidier.

190TGB-1035-H1604Installation13