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

DehumidierML420-MLT1400

■Voltagedropscanoccurwhenusingexcessivelylongcables.

Ifthevoltageacrosstheterminalsusedforconnectingthehumiditysensorislessthan20VAC,aseparate
relaycontrolledbythehumiditysensormustbeused.

4.9Gasreactivation(ML1100unitsonly)

Forfurtherinformationoninstallation,start-upandmaintenanceofgasburners,seeappendixaboutgas
reactivationprovidedwiththeunit.

14Installation190TGB-1035-H1604

DehumidierML420-MLT1400

5Commissioning

TheML420-MLT1400dehumidiershaveseveralstandardfunctionsthatneedtobesetbeforeinitial
start-up.Someofthefunctionsrequireconnectiontoexternalequipment.

Somefeaturesrequireconnectionofexternalequipment.Forwiringdetails,seethewiringdiagram.

5.1Settingsbeforestart-up

5.1.1Continuousprocessairfanoperation

Standardsettingsautomaticallyactivatetheprocessairfanonlywhendehumidicationisrequired.
However,continuousprocessairowcanbedesirableevenwhendehumidicationisnotrequired.

Continuousprocessairowcanbeset,seethewiringdiagram.

5.1.2Single-stagehumiditysensor

NOTE!Whennohumiditysensorisconnected,thedehumidierwillrunatmaximumeffectcontinuously.

Ifasingle-stagehumiditysensoristted,thiswillswitchthedehumidieronandoff.Asingle-stage
humiditysensorisconnectedaccordingtothewiringdiagram.

Tomaintainaircirculation,preselectcontinuousoperationoftheprocessairfaneventhough
dehumidicationisnotrequired.Forfurtherinformation,seesection5.1.1,Continuousprocessairfanoperation.

5.1.3Two-stagehumiditysensor

NOTE!Whennohumiditysensorisconnected,thedehumidierwillrunatmaximumeffectcontinuously.

Ifatwo-stagehumiditysensorisconnected,thiswillcontrolthereactivationheaterintwostages.The
reactivationpoweriscontrolledonthebasisofthehumiditysensorreadingandthesetpoint.Atwo-stage
humiditysensorisconnectedaccordingtothewiringdiagram.

Tomaintainaircirculation,preselectcontinuousoperationoftheprocessairfaneventhough
dehumidicationisnotrequired.Forfurtherinformation,seesection5.1.1,Continuousprocessairfanoperation.

5.1.4Remotefaultindication

ThePCBdisplaycanbeusedforageneralindicationofthefollowingfaultsonthedehumidier:

■Processairfan

■Reactivationairfan

■Drivemotor

■Heater

■Auxiliaryequipmentinput

■Rotorhasstopped(ifthisoptionisinstalled)

■Blockedprocessairlter(ifthisoptionisinstalled)

■Blockedreactivationairlter(ifthisoptionisinstalled)

190TGB-1035-H1604Commissioning15

DehumidierML420-MLT1400

5.2Pre-startchecks

W

ARNING!

W W

ARNING! ARNING!

Installation,adjustments,maintenanceandrepairsmustonlybecarriedoutbyqualiedpersonnelwhoare

awareoftherisksinvolvedwhenworkingwithequipmentoperatingwithhighelectricalvoltageandhighmachine

temperatures.

Beforestartingthedehumidierforthersttime,ensurethatthemainspowersupplyisisolatedfromthe
dehumidierandcarry-outthefollowingchecks:

1.CheckthattheModeswitchonthedehumidierisinthe“OFF”position,seesection6.4,Operatorpanel.

2.Checktheairintakeltersfordamageandproperxationandalsocheckthatallareasinsidetheunitare
clean.

3.Visuallyinspectallductingandductconnectionstomakesurethatallconnectionshavebeencorrectly
installedandthattherearenosignsofdamagetothesystem.Alsocheckthatallductsarefreefrom
obstaclesblockingtheairpassage.

4.Removethetoppanelandcheckthatnoneofthemaincontactbreakersintheelectricaloperatorpanel
havebeentripped.Fordetailsrefertothewiringdiagramsprovidedwiththeunit.

5.Checkthattheincomingpowersupplyvoltageiscorrectandthatthecablesarecorrectlyconnected.

6.Checktherotationdirectionofthefanimpellerafterconnectiontothepowersupply.Openthefront
panelofthedehumidierandtakeouttheprocesslter.Startthedehumidierandcheckthatthefan
impellerisrotating.Switchoffthedehumidierandwatchthefanimpellerjustbeforeitstopsrotating.
Checkthatitisrotatingclockwise.

7.Ifanexternalhumiditysensorisused,checkthatthesensoriscorrectlypositionedintheroomandis
correctlyconnectedtotheunit,seesection4.8,Externalhumiditysensor.

8.Settheprocessandreactivationairowdamperstothefullyopenposition.

16Commissioning190TGB-1035-H1604

DehumidierML420-MLT1400

5.3Airowcheckandadjustment

Toobtainthedesignperformance,thedryairandreactivationairowdampersmustbecorrectlyadjustedin
accordancewiththeratedairow,seesection9.3,Technicaldata.

Ifnecessary,contactMuntersforassistanceconcerninginstallationandsettings.Munterscontactaddresses
areprovidedonthebackcoverofthismanual.

CA

UTION!

CA CA

UTION! UTION!

Incorrectlysetprocessandreactivationairowscancausetheunittomalfunction.

Anydamagetotheunitresultingfromincorrectadjustmentoftheairowscaninvalidatethewarrantyoftheunit.

Theunitmustnotberunformorethanafewminutesbeforesettingupthecorrectairows.

1.Adjustthedampersinstalledinthedryairoutletandreactivationairinletductstothecorrectrated
airows.

2.Startthedehumidierandrunatfullpowerfor8minutestoallowthereactivationheatertoreachits
normaloperatingtemperature.

3.Verifythatthetemperaturedifferencebetweenthereactivationinletairandthereactivationtemperature
is95°C(tolerancelimit±5°C).Ifthetemperaturedifferenceliesoutsideofthe5%tolerancelimit,the
reactivationairdampercanbeadjustedinsmallstepsuntilthereactivationtemperatureiswithinthe
speciedtolerances.Allowthetemperaturetostabiliseaftereachadjustment.

Example:

Inletairtemperature=15°C
Reactivationairtemperature=110°C
Temperatureincrease=95°C

190TGB-1035-H1604Commissioning17

DehumidierML420-MLT1400

6Operation

6.1General

ML420-MLT1400dehumidiersareequippedwithanoperatorpanelwithamodeselectorswitchand
LEDindicators.

Themodeselectoroftheoperatorpanelhastwooperatingpositions:

MAN(Manualmode)

Thedehumidierfans,rotorandreactivationheateroperatecontinuouslyatfullcapacity.

AUTO(Automaticmode)

Thedehumidierfans,rotorandreactivationheateroperatewhentherelativehumidityexceedsthedesired
value.

6.2Quickstop

Undernormaloperatingconditions,themodeswitchisusedtostopandstarttheunit.Inanemergency
situation,stopthedehumidierusingthemainpowerswitchontheside.

CA

UTION!

CA CA

UTION! UTION!

Onlyusethemainpowerswitchtostoptheunitinthecaseofanemergency.Thenormalshutdownsequencewill

notbefollowed.Thefansstopandtheheatercanbeveryhot,whichcanresultindamagetotheheaterandother

componentsclosetoit.

6.3Beforestarting

Followtheinstructionsinsections5.2,Pre-startchecksand5.3,Airowcheckandadjustmentbeforeinitial
start-upofthedehumidier.

18Operation190TGB-1035-H1604

DehumidierML420-MLT1400

1

150 C

100 C

50 C

o

o

o

AU T

MAN

2

14

12

13

11

9

10

8

7

6

5

0

3

4

SET

RH 98

% RH

OUT.1

OUT.2

ALARM

6.4Operatorpanel

Figure6.1Mainpowerswitch

Figure6.2Operatorpanelwithbuilt-inRH98

190TGB-1035-H1604Operation19

DehumidierML420-MLT1400

Item

Switch/Indicator

Function

1MainpowerswitchWhenthemainpowerswitchissetto”0”,thereisnopowerinthecontrolcircuit,

andtheunitcannotbestarted.Whenthemainpowerswitchissetto”1”,poweris
suppliedtothecontrolcircuit,andthedehumidiercanbestartedusingthemode
switch.

2Modeswitch

Whenthemodeswitchissetto”MAN”thedehumidierisinmanualmode.Itthen
runscontinuously(fullcapacity).
Withthepowerswitchsetto”0”,thedehumidierisswitchedoff.
Whenthemodeswitchissetto”AUT”thedehumidierisinautomaticmode.Inthis
mode,asingleortwostagehumiditysensormustbeconnectedtotheunitifitisnot
equippedwithaRH98oraVariDrycontrolsystem.Thehumiditysensor ,RH98or
VariDrydictateswhenthedehumidierstopsandstarts.

3

ReactivationairfanindicatorThereactivationairfanindicatorlamplightswhenthefanisrunning.Itashesifthere

isafaultinthefan.

4Reactivationairtemperature

Indicatesthereactivationairtemperature.

display

5

Mainssupplyconnection
indicator

6Unitrunningindicator

Indicatesthatmainssupplyisconnectedtothedehumidierandthemainpower
switchissetto”1”.

Indicatesthattheunitisrunning,orisreadytostartuponasignalfromthehumidity
sensor,RH98orVariDry(automaticmode).

7

Faultindicator

Aashingfaultwarningindicatorlampindicatesthattheunithasshut-downduetoa
faultinoneofthefollowing:

-Processairfan

-Reactivationairfan

-Drivemotor

-Reactivationheater(stage1)(electricreactivationheatermodelsonly)

-Reactivationheater(stage2)(electricreactivationheatermodelsonly)

-Rotorhasstopped

-Auxiliaryequipment

(1)

(2)

Thecorrespondingindicatorsashtofacilitatefaulttracing.Inaddition,therelay
fortheremoteindicationoffaultsisactivated.Forfurtherinformationseesection

8.3,Faulttracinglist.

8Auxiliaryequipmentindicator

Thisisauserdenedoption.Theindicatorlightsinnormaloperationalmodeand
ashestoindicateafault.Thedehumidierisautomaticallyswitchedoff,andthe
faultandremoteindicatorsareactivatedifafaultoccursintheauxiliaryequipment.
Forunitsttedwithanair-cooledcondenser,theauxiliaryequipmentindicatorlamp
isonwhenthecondenserisinnormaloperationalmodeandashesifafaultoccurs
inthecondenserfanorheater.

9

Processairlterblocked
indicator

(1)

Whentheindicatorforblockedprocessairlterlights,thelterisblocked.Ablocked
lterdoesnotmeanthattheunitmustbeswitchedofforthatthefaultindicatoris
activatedTheremotefaultindicator(ifinstalled)isactivatedwhenablockedlteris
detected.

10DrivemotorindicatorThedrivemotorindicatorlamplightswhentherotor'sdrivemotorisrunning.It

asheswhenthereisafaultinthedrivemotorortherotorhasstopped.

11

ProcessairfanindicatorTheprocessairfanindicatorlamplightswhenthefanisrunning.Itashesifthere

isafault.

12Reactivationheaterindicator

(stage1)

13Reactivationheaterindicator

(stage2)

14

Reactivationairlterblocked
indicator

(1)

Theindicatorlightswhentheheaterstarts.Itashesifthereisafaultintheheater
(stage1).

Theindicatorlightswhentheheaterstarts.Itashesifthereisafaultintheheater
(stage2).

Whentheindicatorforablockedreactivationairlterlights,thelterisblocked.
Ablockedlterdoesnotmeanthattheunitmustbeswitchedofforthatthefault
indicatorisactivatedTheremotefaultindicator(ifinstalled)isactivatedwhena

blockedlterisdetected.
(1)Options.
(2)Forunitsttedwithanair-cooledcondenser,theauxiliaryequipmentindicatorlampisonwhenthecondenserisinnormal

operationalmodeandashesifafaultoccursinthecondenserfanorheater.

Table6.1Operatorpanelfunction

20Operation190TGB-1035-H1604

DehumidierML420-MLT1400

SET

RH 98

%RH

OUT.1

OUT.2

ALARM

6.5RH98operatorpanel

Figure6.3RH98operatorpanel

Checkingandchangingsetpointsandcontrolparameterscanbemadeduringoperationorinstand-by
mode.

ButtonFunction

Display/changeacertainvalueandresetthealarm

Increasethevalue

Decreasethevalue

%RH:Displaypositionofcontrolstepsforreactivationheater(0=off;1=on).

Table6.2RH98operatorpanelfunctions

Duringnormaloperationandinanypositionofthemodeswitchthecurrentrelativeairhumidityis
displayed.

6.6Operatingtheunit

6.6.1Manualmode

1.Setthemainpowerswitchto”1”(on)andcheckthatthemainsconnectionindicationlamplights.

2.SetthemodeswitchonthecontrolpaneltoMAN.Checkthatthefollowingindicatorlampslight:

■Mainssupplyconnectionindicator

■Unitrunningindicator

■Bothindicatorsforthereactivationheater

■Bothprocessairandreactivationairfanindicators

■Drivemotorindicator

3.Lettheunitrunforabout8minutestoallowtheoperatingconditionstostabilise.Thencheckthatthe
reactivationheaterisworking(temperatureindicatorshowsthetemperatureofthereactivationair).

190TGB-1035-H1604Operation21

DehumidierML420-MLT1400

4.Setthemodeswitchonthecontrolpanelto”0”andcheckthatboththeindicatorlampsforthe
reactivationheatergoout.

NOTE!Inordertodissipateanyresidualheat,thereactivationairfan,processairfanandthedrivemotorwill

continuetorun(aftertheunithasbeenswitchedoff)untilthetemperaturehasfallenbelow50°C.

5.Checkthattheprocessairfan,reactivationairfananddrivemotorindicatorsgooutwhenthe
temperaturefallsbelow50°C,andthatthepowerconnectedindicatorremainson.

Fordetailsontheoperatorpanel,seesection6.4,Operatorpanel

6.6.2Automaticmode–humiditysensorconnected

Asingleortwostagehumiditysensormustbeconnectedfortheunittoberuninautomaticmode.For
furtherinformation,seesection5.1.2,Single-stagehumiditysensorand5.1.3,Two-stagehumiditysensor.

1.SetthemodeswitchtoAUT.

2.AdjustthehumiditysensorsetpointtothelowestRHvalue.Setthemainpowerswitchto”1”(on).
Checkthatthefollowingindicatorlampsareonandthattheunitisrunning.

■Mainssupplyconnectionindicator

■Unitrunningindicator*

■Bothreactivationheaterindicators*

■Bothprocessairandreactivationairfanindicators*

■Drivemotorindicator*

NOTE!IfthecurrentRHvalueintheroomtobedehumidiedislowerthanthesetpointonthehumiditysensor,

theaboveindicatorswillnotlightandthedehumidierwillnotstart.

3.Slowlyincreasethehumiditysetpointandcheckthattheunitswitchesoffwhenthesetpointmatchesthe
RHintheroomwherethehumiditysensorisinstalled.

4.Slowlydecreasethehumiditysetpointandcheckthattheunitswitchesonwhenthesetpointfallsbelow
theRHintheroomwherethehumiditysensorisinstalled.

5.Setthemodeswitchonthecontrolpanelto”0”andcheckthatboththeindicatorlampsforthe
reactivationheatergoout.

NOTE!Inorderfortheunit’sheaterstocooldown,thereactivationairfan,processairfanandthedrivemotorwill

continuetorun(aftertheunithasbeenswitchedoff)untilthetemperaturehasfallenbelow50°C.

6.Checkthattheprocessairfan,reactivationairfananddrivemotorindicatorsgooutwhenthe
temperaturefallsbelow50°Candtheunitisrunning,andthatthepowerconnectedindicatorremains
on.

7.AdjustthehumiditysetpointtothedesiredRHvalue.

Fordetailsontheoperatorpanel,seesection6.4,Operatorpanel

6.6.3Automaticmode-RH98orV ariDry(option)

IftheunitisttedwithafactoryinstalledRH98orVariDry(option)humiditycontrolsystem,theexternal
humiditysensormustbeinstalledandcorrectlyconnectedtotheunit.Thesamesiterequirementsapplyto
thehumiditysensorandRH98orVariDry,seesection4.8,Externalhumiditysensor.

Formoreoperationaldetails,seeappendix1.6,Humiditycontrolsystem.

1.SetthemodeswitchtoAUT.

22Operation190TGB-1035-H1604

DehumidierML420-MLT1400

2.AdjusttheRH98orVariDrysetpointtothelowestRHvalue,seesection6.5,RH98operatorpanel.

3.Setthemainpowerswitchto”1”(on).Checkthatthefollowingindicatorlampsareonandthatthe
unitisrunning.

■Mainssupplyconnectionindicator

■Unitrunningindicator*

■Bothreactivationheaterindicators*

■Bothprocessairandreactivationairfanindicators*

■Drivemotorindicator*

NOTE!*IfthecurrentRHvalueintheroomtobedehumidiedisbelowthesetpoint(factorysetting50%RHof

RH98orVariDry),theaboveindicatorswillnotlightandthedehumidierwillnotstart.

4.Slowlyincreasethehumiditysetpointandcheckthattheunitswitchesoffwhenthesetpointmatchesthe
RHintheroomwherethehumiditysensorisinstalled.

5.Slowlydecreasethehumiditysetpointandcheckthattheunitswitchesonwhenthesetpointfallsbelow
theRHintheroomwherethehumiditysensorisinstalled.

6.Setthemodeswitchonthecontrolpanelto”0”andcheckthatboththeindicatorlampsforthe
reactivationheatergoout.

7.Checkthattheprocessairfan,reactivationairfananddrivemotorindicatorsgooutwhenthe
temperaturefallsbelow50°Candtheunitisrunning,andthatthepowerconnectedindicatorremains
on.

8.AdjustthehumiditysetpointtothedesiredRHvalue.

190TGB-1035-H1604Operation23

DehumidierML420-MLT1400

7Serviceandmaintenance

7.1Safety

Figure7.1ElectricalhazardFigure7.2Secureagainstreconnection

W

ARNING!

W W

ARNING! ARNING!

Adjustments,maintenanceandrepairsmustonlybecarriedoutbyqualiedpersonnel.

W

ARNING!

W W

ARNING! ARNING!

Beforedoinganyserviceormaintenanceworkontheunitmakesurethatallelectricalequipmentisdisconnected

fromthepowersupply,andsecuredagainstreconnection.

7.2General

Muntersdehumidiersaredesignedforlong-term,continuoususagewithahighdegreeofreliability.
Aswithallmachinery,regularserviceandmaintenanceisrequiredtokeepthedehumidierinoptimal
conditionsothatitworksmostefciently.

Serviceandmaintenanceintervallengthsareprimarilydeterminedbyoperatingconditionsandthe
environmentinwhichtheunitisinstalled.Forexample,iftheprocessaircontainsalotofdust,preventative
maintenanceshouldbecarriedoutatshorterintervals.Thesamealsoappliesiftheunitworksintensively .

7.3Serviceoptions

Inadditiontocommissioningoftheunittherearefourserviceoptions(A-D)asstandard.

S.Commissioning/start-up.

A.Inspectionandifnecessarychangeoflter.Generalfunctioncheck.

B.InadditiontoA,safetycheckandcapacity ,temperatureandhumidityregulationmeasurements.

C.InadditiontoB,preventivereplacementofsomecomponentsafter3yearsofoperation.

D.InadditiontoC,preventivereplacementofsomecomponentsafter6yearsofoperation.

NOTE!AlwayscontactMuntersforserviceorrepair.Operatingfaultscanoccuriftheunitismaintained

insufcientlyorincorrectly.

NOTE!Commissioning/Start-upinspection"S"byMuntersismandatorytovalidatethefullwarranty.

Muntersserviceengineershavespecialequipmentandrapidsparepartsaccesstohandleserviceonall

Muntersproducts.Alltestequipmentusedbyourpersonneltoensurepropersystembalancingiscertied
foraccuracy .

MuntersServicecanofferaserviceplanadaptedtosuittheconditionsofaspecicinstallation.Seecontact
addressesonthebackpageofthismanual.

24Serviceandmaintenance190TGB-1035-H1604

DehumidierML420-MLT1400

7.4Extendedwarranty

MuntersoffersanextendedwarrantytothestandardtermswhentheCustomersignsaserviceagreement
withMunters.Detailsareavailableonrequest.

7.5Cleaning

UseonlyapH-neutralsoapywatersolutionandasoftspongeforcleaningoftheunitcasing.

Whencleaningtheinside,avoidcontactwiththerotorandwipethesurfacesdry.

Useavacuumcleanerwithabrushheadfortherotor.ContactMuntersforinstructionsifvacuumcleaning
isnotsufcient.

7.6Serviceandmaintenanceschedule

Service

work

Checkandreplacelterifnecessary,

checkfunctions

Capacitycheck,rotorinspectionXXXXXXX

Preventiveinspectionincl.safetycheckXXXXXXX

Replacehightemperaturecut-outXX

Checkdrivebeltandsupportrollersand

replaceifnecessary

ReplacedrivemotorX

Checkfans,impellers,motor,bearingsX

Checkelectricalandcontrolsystems,

checkfunction

ServiceoptionSABABACABABAD

Operatingtime

inhours

Calendartime

inmonths

04000800012000160002000024000280003200036000400004400048000

061218243036424854606672

XXXXXXXXXXXXX

XX

XXXXXXX

Calibratehumiditycontrolequipment

andsensors

Calibratetemperaturecontrol

equipmentandsensors

Checkrotorhousing,replacerotor

gasketsifnecessary

Replacetherotoronlywhenacapacitycheckshowsthatitisnecessary .

XXXXXXX

XXXXXXX

Table7.1Serviceandmaintenanceschedule

190TGB-1035-H1604Serviceandmaintenance25

X

DehumidierML420-MLT1400

NOTE!Serviceworkshouldbeperformedatindicatedoperatinghoursorcalendartime,whicheverisreached

rst.

NOTE!MaintenanceschedulerestartsagainaftermaintenancetypeD.

26Serviceandmaintenance190TGB-1035-H1604

DehumidierML420-MLT1400

7.7Filterchange

Replacetheltersifnecessaryevery6months,seedescriptionbelow.

1.Loosenthetwoscrewsonthetopofthefrontpanel.
UseAllenKeyNo.5.

2.Liftthepanelandremoveitfromtheunit.

3.Pullouttheltercartridge.

4.Cleanthelterhousing.

5.Putinanewlter.Followthearrowtogetthecorrect
airowdirection.

6.Liftthepanelinplace.Makesurethetwobottom
hookstintothepanel.

7.Tightenthetwotopscrews.

190TGB-1035-H1604Serviceandmaintenance27

DehumidierML420-MLT1400

8Faulttracing

8.1General

Thepurposeofthischapteristoprovideguidanceinbasicfaulttracingandprovideinstructionsfor
correctiveactionstoremedyanyfaults.Gothroughthelistinsection8.3,Faulttracinglistbeforecontacting
Munters.Thelistprovideshelpinidentifyingtypesoffaultsthatareeasytoremedywithouttheassistance
ofspeciallytrainedpersonnel.

8.2Safety

W

ARNING!

W W

ARNING! ARNING!

Installation,adjustments,maintenanceandrepairsmustonlybecarriedoutbyqualiedpersonnelwhoare

awareoftherisksinvolvedwhenworkingwithequipmentoperatingwithhighelectricalvoltageandhighmachine

temperatures.

W

ARNING!

W W

ARNING! ARNING!

Beforedoinganyserviceormaintenanceworkontheunitmakesurethatallelectricalequipmentisdisconnected

fromthepowersupply,andsecuredagainstreconnection.

28Faulttracing190TGB-1035-H1604

DehumidierML420-MLT1400

8.3Faulttracinglist

ThecontrolpanelLEDaretheprimarysourceofinformationforfaulttracingwhentheunithasgivenan
alarmandstoppedautomatically.

GothroughthefaulttracinglistbelowbeforecontactingMuntersservicedepartment.Thelistcontains
informationforidentifyingfaultsthatareeasytorepairwithoutthehelpofatechnician.

IftheunitisequippedwiththehumidityregulationsystemRH98,seealsoappendix

1.6,Humiditycontrolsystem.

SymptomIndicatorsPossiblecauseCorrectiveaction

Unithas

stopped.

stopped.

Unithas

stopped.

Nolights.

No.12

doesnot

ash.

No.12,6

and7are

ashing.

Powersupplyfailure.Checkpowersupplytotheunit.

Mainssupplyswitch(no.1)issetto

”0”.

TransformerTC25fuseFU26

failure.

CircuitbreakerQM25trippeddue

toawiringfault.

Theunithasbeensetto

AUTomaticmodebymistakewith

nohumiditysensorconnected.

Humiditysensorfault(AUTomatic

mode).

Ifbothindicatorsareashing,

itindicatesthatone(orboth)of

thehightemperaturecut-outs

(BT27andBT30)havetripped,

duetoeitheranobstructioninthe

reactivationairow,orbecausethe

reactivationairowhasbeenset

toolow.

Setthemainssupplyswitchto”1”andcheckthatthemains

connectionindicator(no.14)ison.

Investigatethecauseofthefaultandrectify.Replacethefuse.

Investigatethecauseofthefault,andrectify.

ResetQM25.Ifthefaultre-occurs,contactMunters.

SetthemodeswitchtoMANual,andcheckthattheunitstarts. Unithas

SetthemodeswitchtoMANual,andcheckthattheunitstarts.Ifthe

unitstarts,thefaultisprobablyinthehumiditysensor.

SetthemodeswitchtoAUTomaticmode,andcheckthehumidity

sensorbyseeingifthedehumidierstartswhenthehumiditysensor

setpointisreduced.Thenresetthehumiditysensorsetpoint.

Calibratethehumiditysensor(accordingtothemanufacturer's

recommendations)ifnecessary ,orreplaceit.

Switchoffthemainssupplyandallowtheunittocooldown.

ResetQM12andQM14circuitbreakersasrequired.

Checkthattheairinlet,outletductsandltersarefreefrom

obstructionsandarenotblockedwithdirt.

Switchonthemainssupplyatthemainssupplyswitchtoresetthe

faultwarning.Checkandadjustthereactivationairow ,seesection

5.3,Airowcheckandadjustment.

Unithas

stopped.

190TGB-1035-H1604Faulttracing29

Either

No.12,6

and7are

ashing.

Safetydeviceshavetrippeddueto

aheaterelementorwiringfault.

Switchoffthemainssupplyandallowtheunittocooldown.

Investigatethecauseofthefault,andrectify.

ResetQM12andQM14asrequired.

Switchonthemainssupplyatthemainssupplyswitchtoresetthe

faultwarning.

SymptomIndicatorsPossiblecauseCorrectiveaction

DehumidierML420-MLT1400

Unithas

stopped.

Unithas

stopped.

No.12,2,8

and/or9are

ashing.

No.1 1and

12.

OnlyNo.

12.

Safetydevicehastrippeddueto

oneofthefollowing:

FanmotorfaultInvestigatethecauseofthefault,andrectify.

DrivemotorfaultML420:ResetQM16-drivemotor ,reactivationfanandprocessfan.

RotorstopwarningInvestigatethecauseofthe“rotorstopped”warningandrectifythe

WiringfaultSwitchonthemainssupplyatthemainssupplyswitch,andstartthe

Unitsttedwithanair-cooled

condenser:

Safetydeviceshavetrippeddueto

acondenserfanfault.

Safetydeviceshavetripped

duetoacondenserheaterfault

(reactivationairtemperature)

Switchoffthemainssupplyandallowtheunittocooldown.

ML690-MLT1400:ResetQM16-reactivationfan.

ResetQM21-drivemotororprocessfan.ResetQM18forunitswitha

condenser.

fault.

unittoresetthefaultwarning.Ifthefaultreoccurs,contactMunters.

Switchoffthemainssupplyandallowtheunittocooldown.Investigate

thecauseofthefault,andrectify .

ResetQM21.

Investigatethecauseofthefault,andrectify.

ResetQM23.

Lossof

performance:

Dehumidier

appearsto

beoperating

correctly,

butisnot

controlling

thehumidity

Table8.1Faulttracinglist

Temperatureincreaseacrossthe

reactivationbatteryistoolow .

Reactivationandprocessairows

donotcorrespondtotherated

airows.

Rotordrivefailure.Checkrotordrivebeltanddrivemotor.

Incorrectfunctioningofhumidity

sensor,RH98orV ariDry

(AUTomaticmode).

Checkthefunctionofthereactivationheater .

Checkandadjustthereactivationairow,seesection

5.3,Airowcheckandadjustment.

Checktheoperationandconnectionofthehumiditysensor ,RH98or

VariDryinaccordancewiththemanufacturer’srecommendations.

30Faulttracing190TGB-1035-H1604

DehumidierML420-MLT1400

s

420

ML

Munter

J

9Technicalspecication

9.1Dimensionsandservicespace

1.Processairinlet3.Reactivationairinlet

2.Dryairoutlet4.Wetairoutlet

Figure9.1RequiredservicespaceFigure9.2Holepatternforductconnection

Dimensions(mm)

Model

(1)

(1)

ABCØDØEFGHJLMNPX

ML42071959313051601002722426501 122423734529670050050128

ML69071959314052001252722427501 122423724529670050050146

MLT80071959313051601002722426501122423734529670050050128

ML110071959315052501602702428501252423734529670050050156

ML135071959315052501602702428501252423724529670050050156

MLT140071959314052001252722427501122423724529670050050146

(1)Spaceforservice.

Y

(1)

Z

Weight

(kg)

Table9.1Dimensionsandservicespacerequirements

190TGB-1035-H1604Technicalspecication31

DehumidierML420-MLT1400

5.0

1.0

2.0

3.0

4.0

ML420

5

10

15

20

25

80%
60%
40%

5.0

1.0

2.0

3.0

4.0

MLT800

5

10

15

20

25

80%
60%
40%

12.5

2.5

5.0

7.5

10.0

kg/h

15.0

ML690

0 5

10

15

20

25

80%
60%
40%

12.5

2.5

5.0

7.5

10.0

kg/h

15.0

ML1100

0 5

10

15

20

25

80%
60%
40%

9.2Capacitydiagrams

Approximatecapacityinkg/h.PleasecontactyournearestMuntersofceformoredetailedinformation.

NOTE!Thebelowguresarebasedonaratedairow.

32Technicalspecication190TGB-1035-H1604

DehumidierML420-MLT1400

12.5

2.5

5.0

7.5

10.0

kg/h

15.0

ML1350

0 5

10

15

20

25

80%
60%
40%

12.5

2.5

5.0

7.5

10.0

kg/h

15.0

MLT1400

0 5

10

15

20

25

80%
60%
40%

1Processairtemperature(°C)

2Processairrelativehumidity(%RH)

3Dehumidicationcapacity(moistureremovalperhour)(kg/h)

190TGB-1035-H1604Technicalspecication33

DehumidierML420-MLT1400

9.3Technicaldata

Thefollowingisapplicabletounitsttedwithelectricreactivationheater.

ModelML420ML690MLT800ML1100ML1350MLT1400

Processair

Ratedairow(m

Ratedairow(m

Minimumavailablestaticpressure(Pa)

Fanmotorpower(kW)at50Hz

Fanmotorpower(kW)at60Hz

Reactivationair

Ratedairow(m

Ratedairow(m

Minimumavailablestaticpressure(Pa)200300200300300300

Fanmotorpower(kW)at50Hz

Fanmotorpower(kW)at60Hz

Ratedcurrent

Current(amps/phase)3~50Hz200V14,925,5-40,2--

Current(amps/phase)3~60Hz200V14,925,5-40,1--

Current(amps/phase)3~50Hz220V12,62214,936-24,3

Current(amps/phase)3~60Hz220V12,622,515,436,4-24,6

Current(amps/phase)3~50Hz230V12,121,614,935,1-24

Current(amps/phase)3~50Hz380V7,312,78,620,824,414,1

Current(amps/phase)3~60Hz380V7,3138,92124,914,2

Current(amps/phase)3~50Hz400V712,48,520,223,613,8

Current(amps/phase)3~50Hz415V6,712,28,419,823,113,5

Current(amps/phase)3~60Hz440V6,411,37,818,622,312,7

Current(amps/phase)3~60Hz460V6,1117,61821,712,4

Current(amps/phase)3~60Hz480V5,910,87,517,621,112,2

Reactivationheater

Temperatureincreaseacrossheater(°C)959595959595

Reactivationheaterpower(kW)4,26,94,21 1,113,56,9

Miscellaneousdata

Drivemotorpower(W)20

FiltersG3

IECprotectionclass(unit)IP33

IECprotectionclass(electricalpanel)IP54

FanmotorwindinginsulationclassClassF

DrivemotorwindinginsulationclassClassF

Hightemperaturecut-out(°C)160±5

Burnercontrollersupplyvoltage1~50Hz(V AC)---220/240--

Contactorcoilvoltage(VAC)24

(1)

3

/s)0,1160,1920,2220,3050,3750,388

3

/h)420690800110013501400

(2)

(3)

(3)

(1)

3

/s)0,0430,0710,0430,1130,1360,071

3

/h)155254155408490254

(3)

(3)

200300200300300300

0,370,550,551,11,11,1

0,370,560,661,321,321,32

-0,370,370,550,550,37

-0,440,440,660,650,44

34Technicalspecication190TGB-1035-H1604

DehumidierML420-MLT1400

External(potential-free)outputcontacts

4

2A,50VAC(max.)

Corrosionclass,outsidecasingC4(painted,AluZink150,ISO12944)

Corrosionclass,insidecasingC3(unpainted,AluZink150,ISO12944)

Environmentalconditions

Operatingtemperature(°C)

Maximuminstallationaltitude,abovesealevel(m)

Transportandstoragetemperature(°C)

(1)Figuresquotedarebasedonfaninlettemperatureof20°C,andanairdensityof1,2kg/m

(2)WithoutoptionalF5orF7lterboxes.

(3)ML420dehumidiershaveasinglemotordrivingbothprocessairandreactivationairfans.

(4)ContactsonthePCBusedtogiveanexternalindicationtotheunit(output).

-20...+40

2000

-20...+70

Table9.2Technicaldata

3

.

190TGB-1035-H1604Technicalspecication35

DehumidierML420-MLT1400

9.4Sounddata

Figure9.3Ductconnections

1.Ductworkfordryair

2.Ductworkforprocessair

3.Ductworkforreactivationair

4.Ductworkforwetair

Denitions:

Lp(A)=Soundpressure(freeeld,DirectivityfactorQ=2,d=1distancefromsourceinmeter)

Lp(A)=Lw(A)+10Log(Q/(4πd²))

Lw(A)=SoundpowerleveldB(A-weighted)

9.4.1SounddataML420

Lp(A)at1mLw(A)Measurerange(Hz)

dBdB631252505001000200040008000

58667272656057605554

Table9.3Soundtoroom,allinletsandoutletsducted

DuctLw(A)Measurerange(Hz)

dB631252505001000200040008000

1.Dryair688879686157534841

2.Processair719380725959595250

3.Reactair769384807364575448

4.Wetair739583765748434027

Table9.4Soundinducts

36Technicalspecication190TGB-1035-H1604

DehumidierML420-MLT1400

9.4.2SounddataML690

Lp(A)at1mLw(A)Measurerange(Hz)

dBdB631252505001000200040008000

60687276696462585551

Table9.5Soundtoroom,allinletsandoutletsducted

DuctLw(A)Measurerange(Hz)

dB631252505001000200040008000

1.Dryair698975726458564739

2.Processair739183786461625954

3.Reactair769383797168625851

4.Wetair719383735950463924

Table9.6Soundinducts

9.4.3SounddataMLT800

Lp(A)at1mLw(A)Measurerange(Hz)

dBdB631252505001000200040008000

59677575686459585857

Table9.7Soundtoroom,allinletsandoutletsducted

DuctLw(A)Measurerange(Hz)

dB631252505001000200040008000

1.Dryair718478756860605448

2.Processair759086786663656259

3.Reactair769384807364575448

4.Wetair739583765748434027

Table9.8Soundinducts

190TGB-1035-H1604Technicalspecication37

DehumidierML420-MLT1400

9.4.4SounddataML1100

Lp(A)at1mLw(A)Measurerange(Hz)

dBdB631252505001000200040008000

64727581736865635856

Table9.9Soundtoroom,allinletsandoutletsducted

DuctLw(A)Measurerange(Hz)

dB631252505001000200040008000

1.Dryair778988817164625345

2.Processair798987806971726964

3.Reactair849391878176706863

4.Wetair799692836958544840

Table9.10Soundinducts

9.4.5SounddataML1350

Lp(A)at1mLw(A)Measurerange(Hz)

dBdB631252505001000200040008000

67757783747268666159

Table9.11Soundtoroom,allinletsandoutletsducted

DuctLw(A)Measurerange(Hz)

dB631252505001000200040008000

1.Dryair809389847768665646

2.Processair808886817272746860

3.Reactair839389858177716762

4.Wetair759287787062565243

Table9.12Soundinducts

38Technicalspecication190TGB-1035-H1604

DehumidierML420-MLT1400

9.4.6SounddataMLT1400

Lp(A)at1mLw(A)Measurerange(Hz)

dBdB631252505001000200040008000

63717480736763635856

Table9.13Soundtoroom,allinletsandoutletsducted

DuctLw(A)Measurerange(Hz)

dB631252505001000200040008000

1.Dryair789184817468726055

2.Processair828587827373777166

3.Reactair768983797269636052

4.Wetair709380715849484130

Table9.14Soundinducts

190TGB-1035-H1604Technicalspecication39

DehumidierML420-MLT1400

10Scrapping

Theunitmustbescrappedinaccordancewithapplicablelegalrequirementsandregulations.Contactyour
localauthorities.

Iftherotororltershavebeenexposedtochemicalsthataredangeroustotheenvironmenttheriskmust
beassessed.Thechemicalscanaccumulateinthematerial.Takethenecessaryprecautionstocomplywith
applicablelocallegalrequirementsandregulations.

Therotormaterialisnotcombustible,andshouldbedepositedlikeglassbrematerials.

W

ARNING!

W W

ARNING! ARNING!

Iftherotoristobecutinpieces,wearasuitableCEmarkedfacemaskselectedandttedinaccordancewiththe

applicablesafetystandardstoprotectfromthedust.

40Scrapping190TGB-1035-H1604

DehumidierML420-MLT1400

Appendix1Options

1.1General

TheML-seriesdehumidiersaredesignedsothatoptionalproductscanbeeasilyttedtothem.

Thisappendixcontainsinformationaboutalloptionalcongurationsandcomponentsthatcanbeadded
whenorderingMLdehumidiers.

NOTE!Voltagedropscanoccurwhenusingexcessivelylongcables.Ifthereislessthan20Vsupplyatthe

connectionpointsofthehumiditysensor(onthedehumidier),aseparaterelaycontrolledbythehumiditysensor

mustbeused.

1.2Runningtimemeter

Therunningtimemeterrecordsthetotalnumberofhoursthedehumidierhasrun.Thelasttwodigits
representapercentagepartofanhour.Therunningtimemetercannotbereset.
Example:0000475representsfourhoursand45minutes.

1.3Rotorstopalarm

Anoptionalreedswitchmomentarilysendsapulseonceperrevolutionoftherotor,i.e.onceevery8
minutes.Theswitchisactivatedbyamagnetmountedontherotortoproducea0VDCpulse.

Ifthepulsedoesnotoccurwithin10minutes,thedrivemotorandfaultwarningindicatorsashtoshowthat
afaulthasoccurred.Theunitisautomaticallyswitchedoff.

1.4Blockedlteralarm

Adifferentialpressureswitchcanbettedtotheprocessairandreactivationairlters.Whenthepressure
differentialacrossthelterexceedsthebelowpresetvalue,theswitchcloses,whichsendsamessage
(blockedlter)tothePCBcard.Theprocessairorreactivationairlterindicatorlightsuptoindicatethe
specicblockedlter.

1.5Filterbox-M5andF7

ML420-MLT1400dehumidierscanbeequippedwithexternallterboxesM5orF7.

Forinstructionsonhowtoattachthelterboxtotheprocessairinletorreactivationairinlet,refertothe
instructionssuppliedwiththedeliveryofthelterbox.

Thediagrambelowshowsthepressuredrop(Pa)acrossthelterinthelterbox.

190TGB-1035-H1604Options41

500

700

900

1100

1300

1500

20

0

40

60

80

100

120

F5
F7

400

Pa

m3/h

M 5

F7

Figure1.1Pressuredrop,lterinthelterbox

DehumidierML420-MLT1400

NOTE!Thepressuredropforthereactivationsideisnotshownonthediagramsincethevaluesaresosmallthat

theydonotaffecttheperformanceoftheunit.

1.6Humiditycontrolsystem

1.6.1Introduction

MuntersRH98andVariDryarehumiditycontrolsystemsintendedforusewithMuntersdehumidiers.
Theycontroltheairhumiditybyregulatingthepowertotheunitreactivationheater.

Thesystemcomprisesahumiditytransmitterandacontrolunit.Thehumiditytransmitterisatruetwo
wiretransmitter,whichispositionedwheretheairhumidityistobecontrolled,eitherintherelevantroom
orintheairduct.

Thecontrolunitsendscontrolsignalstothedehumidier.Thepowercontrolisperformedinoneortwo
steps.

Thesystemhasapotentialfreecontacttowhichanexternalalarmdevicecanbeconnected.

1.6.2Transmitter

Thehumiditytransmittersareavailableintwodifferenttypes,wallorductmounted.

Thehumiditytransmittersensoremitsasignalproportionaltotheairhumidity.

Thesignalisampliedandsenttothecontrolunitbycable.

Thehumiditytransmittersensorissensitiveandmustbehandledwithcare.

1.6.3Controlunit

Thecontrolunitcontainsacontroller,whichreceivesthesignalfromthehumiditytransmitter.The
controllerthensendsacontrolsignaltothedehumidierwhichdeterminesthereactivationheateroutput.

42Options190TGB-1035-H1604

DehumidierML420-MLT1400

Thereisalsoanoperatorpanelwithadisplayonthecontrolunit.Duringnormaloperation,thedisplay
showsthecurrentmeasuredairhumidity.

Differentparameterscanbesetusingthepushbuttonsonthepanel.Examplesaresettingsforairhumidity,
controllerlimitsandalarmlimits.

Thecontrolunitconstantlyreceivesasignalfromthehumiditytransmitter,andcontrolstheairhumidity
byregulatingthepowertotheunitreactivationheaterinoneortwosteps.Intheeventoftwoheatersteps,
abasicstep2/3ofthereactivationoutputisachieved,afterwhich1/3ofthereactivationoutputcanbe
controlledasafollowingstep.

Thecontrolunitisprovidedwithapotentialfreecontacttowhichanexternalalarmdevicecanbe
connected.Theexternalalarmisactivatedtogetherwiththeinternalalarm.

1.6.4Setpointsandcontrolparameters

Checkingandchangingsetpointsandcontrolparameterscanbemadeduringoperationorinstand-bymode.

Figure1.2Operatorpanel

ButtonFunction

Display/changeacertainvalueandresetthealarm

Increasethevalue

Decreasethevalue

%RH:Displaypositionofcontrolstepsforreactivationheater(0=off;1=on).

Duringnormaloperationandinanypositionofthemodeswitchthecurrentrelativeairhumidityis
displayed.

CA

UTION!

CA CA

UTION! UTION!

Damageduetoincorrectadjustmentofthesystemmayinvalidatethewarranty.

190TGB-1035-H1604Options43

DehumidierML420-MLT1400

1.6.5Display/changesetpointforrelativehumidity

1.Press/release.Thevalueinthelowerrightcornerstartsashingandshowsthecurrentsetpoint.The
displayautomaticallyreturnstonormalafterabouttwentyseconds,i.e.showscurrentvalueforrelative
humidity.

2.Pressandholddownandthecurrentsetpointlightsupwithaxedlight.Whenthebuttonisreleased
again,thedisplayashesbeforeautomaticallyreturningtonormal.

3.Pressandholddownandatthesametimepress

ortosetthedesiredsetpoint.

4.Releaseandthedisplaystartstoash,indicatingthenewsettingbeforeitautomaticallyreturnsto
normali.e.showsthecurrentairhumidity.

1.6.6Display/changeotherparameters

Theoperatorpanelsetpointsarepresetatthefactoryto50%RH.Severalotherinternalparameterscanbe
setinadditiontothesetpoint,e.g.differential,sensoroffsetandsetpointrange,seeTable1.1.

1.Pressandholddown

formorethantensecondstoshowtheparametermenu.Thecharactersinthe

topandbottomsegmentsintheleft-handdisplaystarttoash.Parameter10isshown.Release.

2.Pressortoselectaparameter.

3.Pressandholdtoshowthecurrentvaluefortheselectedparameter.

4.Pressandholdandpress

ortochangetheparametervalue.

5.Release.Thenewsettingsaresavedautomatically .Thedisplayautomaticallyreturnstonormalafter
abouttwentyseconds,i.e.showscurrentvalueforrelativehumidity.

44Options190TGB-1035-H1604

DehumidierML420-MLT1400

ParameterDescriptionPossibleparameterselectionDefaultsetting

05Correctionofthehumiditytransmitter’sread-offvalue0%RHNosettings

10OFF/ONinterval,stage11-15%RH2%RH

11Offsetstage1-15-+15%RH-1%RH

12OFF/ONinterval,stage21-15%RH6%RH

13Offsetstage2-15-+15%RH-1%RH

14OFF/ONintervalalarmoutput1-15%RH1%RH

15Offsetfromsetpoint,alarmoutput-15-+15%RH0%RH

30Alarmthresholdtype:0=Notactivated;1=Absolute;2

2=Relative

31Minimumalarmthreshold-100-+100%RH-50%RH

32Maximumalarmthreshold-100-+100%RH10%RH

33Delayforminimumalarm0-99minutes0min.

34Delayformaximumalarm0-99minutes0min.

35Functionofalarmoutput0=monitoralarm1=check1

36Resetalarmwhenthecauseofthealarmisrectied0=No;1=Y es1

37AlarmresettingwhentheSETbuttonispressed0=No;1=Yes1

(1)

(2)

(displayonly)

40Powerdelayafterpowerfailure0-99minutes0min.

41Forcedrelayfunctionathumiditytransmitterfailure0=Off;1=Humidication;2

2=Dehumidication

(1)ActivatedwhenRHexceeds2%ofthesetpoint,deactivatedwhenRHfallsbelow1%ofthesetpoint.

(2)ActivatedwhenRHexceeds6%ofthesetpoint,deactivatedwhenRHfallsbelow1%ofthesetpoint.

Table1.1Operatorpanelsystemparameters–RH98

190TGB-1035-H1604Options45

DehumidierML420-MLT1400

ParameterDescriptionPossibleparameterselectionDefaultsetting

01Proportionalband1-15%RH5

02Integrationtime0-99seconds0(=off)

03Differentialaction,percentage0-100%RH0(=off)

04Cycletime0-999seconds20

05Correctionofthehumiditysensors’svalue-15-+15%RHNosettings

10Offset,relay-20-20%RH10

11Differential,relay-21-5%RH1

20Minimumsetpoint0-100%RH0

21Maximumsetpoint0-100%RH100

40Delayinregainingsupplyafterapowercut0-99min.0

41Forcedsolid-stateoutputwheresensorfault0=No;1=100%output0

42Forcedrelay-2outputwheresensorfault0=No;1=Y es0

Table1.2Operatorpanelsystemparameters–VariDry

46Options190TGB-1035-H1604

DehumidierML420-MLT1400

1.6.7Processalarms

Theoperatorpanelisequippedwithaninternalalarmthatisactivatedwhenthealarmthresholdsare
exceeded.Thealarmisindicatedinthedisplayontheoperatorpanel.

Alarmmessages

Thedisplayontheoperatorpanelshowsthefollowingmessages(steadilylit):

rHI

rLO

E1

EEE

Upperalarmlimitexceeded

Loweralarmlimitexceeded

Faultyhumiditytransmitterorincorrectconnections

Allparametersettingsarelost

AcknowledgealarmonRH98

Acknowledgethealarmbypressingontheoperatorpanel.Thedisplaynowstartstoashanddisplays
thealarmmessageandthecurrentrelativeairhumidityalternately.Thefunctionfortheresetbuttonis
dependentontheparametersettings,seeTable1.1.

Sensorcalibration

Thehumiditytransmitter'sreadoffvaluecanbecalibratedusingtheoperatorpanelsensoroffset,se
parameter05,Table1.1.

Example:If3%RHistoomuch,theoffsetshouldbereducedby3%.
ContactMuntersforcalibrationofthehumiditytransmitter.

190TGB-1035-H1604Options47

DehumidierML420-MLT1400

2ContactMunters

AUSTRIA

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AirTreatment

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AirTreatment

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Kuivaajamyynti

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AirTreatment

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AirTreatment-Zentrale

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AirTreatment

MuntersVochtbeheersingEnergieweg69

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OddzialwPolsce
AirTreatment

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AirTreatment

MuntersEuropeAB
AirTreatment

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AirTreatment
ZweigniederlassungRümlang

MuntersLtd
AirTreatment

Eduard-Kittenberger-Gasse56,
Obj.6
A-1235Wien

Blarenberglaan21c
B-2800Mechelen

Slevacská2368/68
CZ-61500BRNO

Ryttermarken4
DK-3520Farum

Hakamäenkuja3
FI-01510V ANTAA

106,BoulevardHéloise
F-95815ArgenteuilCedex

Hans-Duncker-Str.8
D-21035Hamburg

StradaPiani2
I-18027Chiusavecchia
IM

NL-2404HEAlphena/dRijn

ul.Swietojanska55/11
81-391Gdynia

EuropaEpresarial.EdicioLondres.
C/PlayadeLiencres2.
28230LasMatas.Madrid

P .O.Box1150
SE-16426Kista

Glattalstr.501
CH-8153Rümlang

KnowledgeCentre,WybostonLakes
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