Munters MG Owner's manual

Brand: Munters

Model: MG

Category: Dehumidifiers

Type: Owner's manual

Munters MG: Advanced Dehumidification Solutions for Optimal Air Quality

With the Munters MG desiccant dehumidifier, you've made a wise choice for managing humidity levels efficiently. Experience precise dehumidification with its ability to effectively remove excess moisture from the air. Protect your environment from the damaging effects of high humidity, ensuring a comfortable and healthy atmosphere.

Munters MG: Advanced Dehumidification Solutions for Optimal Air Quality

Originalinstructions

Usermanual

MG50,MG90

Desiccantdehumidier

190TGB-1004–N1402©MuntersEuropeAB2014

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.

Itisaconditionofthewarrantythattheunitforthe

fullwarrantyperiodisservicedandmaintainedas

describedinsectionServiceandmaintenance.Theservice

andmaintenancemustbedocumentedforthewarranty

tobevalid.

Safety

Informationaboutdangersareinthismanualindicated

bythecommonhazardsymbol:

W W

ARNING! ARNING!

ARNING!

Indicatesapossibledangerthatcanleadtopersonalinjury.

CA CA

UTION! UTION!

UTION!

Indicatesapossibledangerthatcanleadtodamagetothe

unitorotherproperty,orcauseenvironmentaldamage.

NOTE!Highlightssupplementaryinformationforoptimal

useoftheunit.

ConformitywithDirectives

Thedehumidierisinconformitywiththeessential

safetyrequirementsoftheMachineryDirective

2006/42/EC,theLowVoltageDirective2006/95/EC,

theRoHSDirective2011/65/ECandtheEMC

Directive2004/108/EC.Thedehumidieris

manufacturedbyanISO9001:2008accredited

manufacturingorganisation.

Thecontentsofthismanualcanbechangedwithout

priornotice.

NOTE!Thismanualcontainsinformationwhichis

protectedbycopyrightlaws.Itisnotallowedtoreproduceor

transmitanypartofthismanualwithoutwrittenconsentfrom

Munters.

Pleasesendanycommentsregardingthismanualto:

MuntersEuropeAB

TechnicalDocumentation

P.O.Box1150

SE-16426KISTASweden

e-mail:t-doc@munters.se

iiImportantuserinformation190TGB-1004–N1402

Tableofcontents

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

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

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

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

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

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

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

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

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

1.3Safety..................................

1.4Marking................................

2Dehumidierdesign.......................4

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

2.2Principleofoperation..................

3Transport,inspectionandstorage.......5

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

3.2Packaginganddeliveryinspection...

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

4Installation...................................6

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

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

4.3Connectionofductsandhoses.......

4.4Hoselengthandoriceplateaffects

theairow..............................

4.5Mountingtheunitonthewall..........

4.6Installationexamples.................

4.6.1Closedsystem.................

4.6.2Opensystem...................

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

4.8Connectingthehumidistat............

5Operation....................................13

5.1Safety..................................

5.2Priortostart............................

5.3Start....................................

5.3.1Manualoperation..............

5.3.2Automaticoperation...........

5.4Stoptheunit............................

6Serviceandmaintenance.................15

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

6.2Maintenanceschedule................

6.3Filterreplacement.....................

7Faulttracing.................................17

8Technicalspecication....................18

8.1Dimensionsandservicespace.......

8.2Capacitydiagrams....................

8.3Fancurves.............................

8.4Technicaldata.........................

9Scrapping....................................22

10ContactMunters............................24

190TGB-1004–N1402Tableofcontentsiii

MG50&MG90

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.

CA CA

UTION! UTION!

UTION!

Donotsit,stand,orplaceanyobjectsontheunit.

1Introduction190TGB-1004–N1402

MG50&MG90

1.3Safety

Everymeasurehasbeentakeninthedesignandmanufactureofthedehumidiertoensurethatitmeetsthe

safetyrequirementsofthedirectivesandstandardslistedintheECDeclarationofConformity.

Theinformationinthismanualshallinnowaytakeprecedenceoverindividualresponsibilitiesorlocal

regulations.

Duringoperationandotherworkwithamachineitisalwaystheresponsibilityoftheindividualtoconsider:

■Thesafetyofallpersonsconcerned.

■Thesafetyoftheunitandotherproperty.

■Theprotectionoftheenvironment.

ThetypesofdangersthatareindicatedinthismanualaredescribedinsectionImportantuserinformation.

W W

ARNING! ARNING!

ARNING!

-Theunitmustnotbesplashedwithorimmersedinwater.

-Allelectricalinstallationsmustbecarriedoutbyaqualiedelectricianandinaccordancewithlocalregulations.

-Theunitmustbeconnectedtoanearthedelectricaloutlet.

-Donotconnecttheunittoothermainsvoltagethanspeciedontheidenticationplate.

-Donotoperatetheunitifthepowerplugorcordisdamaged,riskofelectricalshock.

-Donotpulltheplugwithwethands,riskofelectricalshock.

-Donotinsertngersoranyotherobjectsintotheairvents,rotatingfansareinside.

-Donotcovertheunitasthatcanblockairintakeoroutletandcauseare.

-Iftheunithasoverturned,cutthepowerimmediately.

-AlwayscontactMuntersforserviceorrepair.

190TGB-1004–N1402Introduction2

MG50&MG90

1.4Marking

Type MG50

Fabr.No 0214 190XXX XXXXX

1 ~ 230V 50Hz

0.040 kW 0,4 kW

Max

0,440 kW

Munters Europe AB

IP44

Figure1.1Identicationplateposition

Type

Fa br. No.

Fa br. yea r

0,09 kW

Max 0,74 kW

0919 190XXX XXXXX

2009

MG90

230V 50 Hz

Ma de in S we de n

Munters Europe AB

Isa fjords ga ta n 1

164 26 Kista , S we de n

Weight: 10 kg

IP44

0,65 kW

oHS

Figure1.2Identicationplate

Explanationof"Fabr.No"ontheidenticationplate:

09:Yearofmanufacture

19:Weekofmanufacture

190XXX:Articlenumber

XXXXX:Serialnumber

3Introduction190TGB-1004–N1402

MG50&MG90

2Dehumidierdesign

2.1Productdescription

Thedesiccantdehumidiersaredesignedtoeffectivelydehumidifytheair.Theircompactformis

comprisedofsectionsthatareheldtogetherwithjustfourbolts.Thefan,desiccantrotorandreactivation

heaterareheldintheirrespectivesectionswithoutanyfurthermeansofattachment.Oneofthesections

containsadistributionchamberwithinsulatedsectionsthatprovideexactlytherightbalancebetweenthe

dehumidifyingandreactivationairows.Thesturdyoutercasingismadeofcorrosionresistant,die-cast

aluminium.

TheelectricalequipmentcomplieswiththeEN60204-1standard.Thedehumidierismanufactured

accordingtouniformEuropeanstandardsandtheestablishedrequirementsforCE-marking.

2.2Principleofoperation

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.

1.Filter

2.Heater

3.Rotor

4.Drivemotor

5.Circuitboard

6.Filter

7.Impeller

A.Reactivationair

B.Wetair

C.Processair

Figure2.1Principleofoperation

D.Dryair

190TGB-1004–N1402Dehumidierdesign4

MG50&MG90

3Transport,inspectionandstorage

3.1Transport

Usethehandleswhenliftingtheunit.

Usetheoriginalpackagingwhenshippingtheunit.

Figure3.1Handles

3.2Packaginganddeliveryinspection

1.Inspectthedeliveryandcomparewiththedeliverynote,orderconrmationorotherdelivery

documentation.Makesurethateverythingisincludedandnothingisdamaged.

2.ContactMuntersimmediatelyifthedeliveryisnotcompleteinordertoavoidinstallationdelays.

3.Iftheunitistobeputintostoragepriortoinstallation,seesectionStoringtheequipment.

4.Removeallpackagingmaterialfromtheunit,andmakesurethatnodamagehasoccurredduring

transportation.

5.AnyvisibledamagemustbereportedinwritingtoMunterswithin5daysandpriortoinstallationof

theunit.

6.Disposeofthepackagingmaterialaccordingtolocalregulations.

3.3Storingtheequipment

Followtheseinstructionsifthedehumidieristobestoredpriortoinstallation:

■Placethedehumidierinanuprightpositiononahorizontalsurface.

■Re-usethepackagingmaterialtoprovideprotectionfortheunit.

■Protectthedehumidierfromphysicaldamage.

■Storethedehumidierundercoverandprotectitfromdust,frost,rainandaggressivecontaminants.

5Transport,inspectionandstorage190TGB-1004–N1402

MG50&MG90

4Installation

4.1Safety

W W

ARNING! ARNING!

ARNING!

Donotconnecttheunittoothermainsvoltagethanspeciedontheidenticationplate.

Theunitmustbeconnectedtoanearthedelectricaloutlet.

Donotoperatetheunitifthepowerplugorcordisdamaged.

CA CA

UTION! UTION!

UTION!

Donotsit,stand,orplaceanyobjectsontheunit.

4.2Siterequirements

Thedehumidierisintendedforindoorinstallation.Itmustbeplacedinanuprightpositioninsideor

outsidethespacetobedehumidiedandatleast15cmabovetheoor.

Avoidinstallingthedehumidierwherethereisariskofwaterenteringtheunit,orinaverydusty

environment.

Forunitandservicedimensions,seesection8.1,Dimensionsandservicespace.

NOTE!Itisimportantthattheintendedinstallationsitemeetstherequirementsinordertoachievethebest

possibleperformanceandtrouble-freeoperation.

Donotpositionthewetairsideorrearside(seeFigure4.1)nearthewallorheat-sensitiveobjects.

Positionthedehumidiersothatthereisenoughroomforaircirculation.

Figure4.1

1.Wetairside

2.Rearside

190TGB-1004–N1402Installation6

MG50&MG90

4.3Connectionofductsandhoses

Followtheinstructionsbelowwhenattachingductsorexiblehosestotheairconnections.Theprocessand

reactivationairinletanddryairoutletcanbeconnectedtoaductsystemorbeusedwithfreeinletandoutlet.

Thewetairoutletmustalwaysbeconnectedtoaductorhose,whichmustbettedatadownwardangle

(awayfromthedehumidier)sothatcondensationisdrained.

■Ductlengthmustbekeptasshortaspossibletominimisestaticpressureloss.

■Allductandhoseconnectionsmustbeairtightandvapourtighttoensurefullperformance.

■Thewetairductorhosemustbemountedatadownwardanglesothatcondensationcanbedrained.

Thewetairhoseorductmusthavesuitabledrainageatlowtemperaturestopreventpoolingof

condensate.Alternatively,condensationcanbeavoidedbyinsulatingtheductwithatleast25mmof

insulation.

■Covertheductopeningforoutdoorairwithmeshtopreventbirdsandrodentsfromenteringtheunit.

Positiontheopeningsothatrainandsnowcannotentertheduct.

■Thewetairductorhosemustbecorrosionresistantandabletowithstandtemperaturesupto70°C.

■Thewetairisnormallytransportedoutdoors.Inlargepremiseswherethedehumidierisoutsideofthe

spacetobedehumidied,thewetaircanbeledawayneartheunit.Positiontheoutletsothatthewetair

doesnotblowtowardsmoisture-sensitiveobjects.

■Theminimumdistancebetweenthereactivationinletorwetairoutletandthewallis0.5m.

■Theltersforbothprocessandreactivationaircanbereplacedwithouthavingtodetachductsorhoses.

CA CA

UTION! UTION!

UTION!

Ifthereisariskoffreezingtemperatures,thewetairductsmustbeinsulated.

NOTE!Noisereductioncanbeachievedbyconnectingductstothedehumidier.

4.4Hoselengthandoriceplateaffectstheairow

Wetair/reactivationair

Thedehumidierisequippedwithanoriceplate(A)inthewetairoutlet.Whenawallpipeisconnected

tothehose(see4.5,Mountingtheunitonthewall),oriftheexiblehoseorductislongerthan5m(max.10

m),theoriceplatemustberemoved.

Dryair/processair

Thehoseorductfordryandprocessaircanhaveatotallengthof10mbeforedehumidicationcapacityis

affected.Theconnectionpiece(B)makesitpossibletoconnectthedryairoutlettoahoseorductsystem.

7Installation190TGB-1004–N1402

MG50&MG90

Figure4.2Connectiontoairducts

A.Oriceplateforwetair(includedindelivery)

B.Connectionpiecefordryairoutlet(option)

C.Connectionpieceforairinlet(option)

4.5Mountingtheunitonthewall

TheMGunitcanbemountedonthewallintwodifferentwaysusingawallbracket(optionalequipment),

seeFigure4.3andFigure4.4.Thisenablesoptimizedpositioningofthewetanddryairoutletstomeetany

desiredrequirements.

■Alternative1:Thewetairoutletisplacednearthewallontherightsideoftheunit.

■Alternative2:Thefrontoftheunitispositionedagainstthewallsothatthewetairoutletisfarfromthe

wallontheleftsideoftheunit.

NOTE!Inbothalternative1and2,awoodblock(orsimilar)mustbeplacedbetweenthewallbracketandthe

wall.Thewoodblockisneededtoensurethereissufcientspacefortheairtocirculatearoundtheunitandtomake

itpossibletomountthehumidistatcontact(alternative2).

190TGB-1004–N1402Installation8

MG50&MG90

Figure4.3Wall-mountedunit,alternative1Figure4.4Wall-mountedunit,alternative2

A.Wallbracket(option)C.Wallpipe(option).Mountedatadownwardangletowardstheoutsideofthe

building.

B.WetairhoseD.Woodblock(depth30mm,width40mm,length350mm)

NOTE!Mountthewallpipewiththethinpipefacingdowntoenablecondensatedrainagethroughthepipe,

seeFigure4.5.

00000

0000

Figure4.5Wallpipe

9Installation190TGB-1004–N1402

MG50&MG90

4.6Installationexamples

4.6.1Closedsystem

Theairintheroomiscirculatedthroughthedehumidier.

Figure4.6Closedsystem,dehumidierlocatedintheroom.

1.Dehumidierlocatedintheroom:

Thewetairoutletisconnectedtoahoseandisthenemittedoutside

theroom(outdoors).Thereactivationairistakenfromtheoutsidevia

ahoseorductconnectedtoaconnectionpiece.

NOTE!Ashorthose(~0.3m)onthedryairoutlet

canimproveaircirculationandeliminatetheriskof

short-circuitingdryairandprocessair.

Figure4.7Closedsystem,dehumidierlocated

outsidetheroom.

2.Dehumidierlocatedoutsidetheroom:

Theprocessairistakenfromthedehumidiedroomviaahoseorduct

connectedtoaconnectionpiece.Thedryairisemittedintotheroom

throughahoseconnectedtoaconnectionpiece.

Figure4.8Closedsystem,dehumidierlocatedintheroom.

3.Dehumidierlocatedintheroom:

Thewetairoutletisconnectedtoahoseandthewetairisemitted

outsideoftheroom(outdoors).Thereactivationairistakenfromthe

dehumidiedroom.

Thedehumidicationcapacitybecomes2/3ofthatindicatedinthe

diagram,seechapter8.2,Capacitydiagrams.

NOTE!Ashorthose(~0.3m)onthedryairoutlet

canimproveaircirculationandeliminatetheriskof

short-circuitingdryairandprocessair.

190TGB-1004–N1402Installation10

MG50&MG90

4.6.2Opensystem

Thespaceisventilatedwithdehumidiedair.

Figure4.9Opensystem,dehumidierlocated

outsidetheroom.

1.Dehumidierlocatedoutsidetheroom:

Dryairisemittedintotheroomviaahoseorductconnectedtoa

connectionpiece.

Figure4.10Opensystem,dehumidierlocatedintheroom.

2.Dehumidierlocatedintheroom:

Thewetairoutletisconnectedtoahoseandthewetairisemitted

outsidetheroom(outdoors).Thereactivationairandprocessairare

takenintotheunitviahosesorductsandconnectionpieces.Dryair

isemittedintotheroomviaaconnectionpiece.

11Installation190TGB-1004–N1402

MG50&MG90

4.7Electricalconnections

Includedwiththedeliveryisa2.5mlongpowercablewithaplugforconnectiontoanearthedoutlet.The

voltageandfrequencyarespeciedontheunitidenticationplate,seesection1.4,Marking.

4.8Connectingthehumidistat

Thedehumidiercomeswithasocketdesignedfortheconnectionofasinglestephumidistatwithlow

voltage.Seethegurebelow .Thehumidistatcanbeorderedasanaccessory.

Figure4.11Connectorforhumidistatcable

Theconnectionsocketforthehumidistatislocatedonthefrontoftheunit.

Figure4.12Humidistatconnectionsocket(1)

Aroomhumiditysensoristobemounted1-1.5mabovetheoor.Itmustbepositionedsothatitisnot

directlyexposedtodryairfromtheunitortohumidairowinginthroughopeningdoors.Positionitaway

fromheatsourcesanddirectsunlight.

Thehumidistatmustbeasingle-stagehumidistatandconnectedsothatthecontrolcircuitcloseswhen

relativehumidityincreases.Theconnectioncablemustbescreenedandequippedwithacopperconductor

withaminimumcross-sectionareaof2x0.75mm

Iftheunitisusedtogetherwithanexternalhumidistat,operationmodeAorBcanbeused.

ModeA:ThehumidistatregulatestheentiredehumidierON/OFF(standardmode).

ModeB:Thehumidistatonlyregulatesthereactivationheaterandthefanoperatescontinuously.

ContactMuntersforchangingtheoperationmode.

190TGB-1004–N1402Installation12

MG50&MG90

5Operation

5.1Safety

W W

ARNING! ARNING!

ARNING!

Donotoperatetheunitifthepowerplugorcordisdamaged.

Donotinsertngersoranyotherobjectsintotheairvents.

Theunitcanrestartautomaticallywithoutwarningfollowingapowerfailure.

CA CA

UTION! UTION!

UTION!

Donotsit,stand,orplaceanyobjectsontheunit.

5.2Priortostart

Thefollowingchecksmustbecarriedoutbeforethedehumidierisstartedforthersttime:

1.Checkthattheunitiscorrectlyconnectedtothepowersourceaccordingtotheidenticationplate,see

chapter1.4,Marking.Ifafusedswitchhasbeentted,thefusedataoftheswitchmustbechecked.

2.Ifahumidistathasbeeninstalled,theusermustcheckthatithasbeencorrectlypositionedintheroom

andhasbeencorrectlyconnectedtotheunit,seechapter4.8,Connectingthehumidistat.

13Operation190TGB-1004–N1402

MG50&MG90

5.3Start

5.3.1Manualoperation

SetthemodeselectorswitchtoMANandconnectthedehumidiertoawallsocket,oroperatetheexternal

circuitbreaker,andcheckthattheunitstarts.

Figure5.1MAN-AUTmodeselectorswitch(1)

5.3.2Automaticoperation

NOTE!Toenablerunningtheunitinautomaticmode,asingle-stagehumidistat(option)mustbeinstalledand

connectedtotheunit.

1.Connectthedehumidiertoawallsocket,oroperatetheexternalcircuitbreaker,andcheckthatthe

unitstarts.

2.SetthemodeselectorswitchtotheAUTpositionandadjustthehumidistatsetpointtotheminimum

valueforrelativehumidity(RH).

3.Slowlyincreasethehumidistatsetpointuntilthedehumidierstops.Thisisdonetocheckthatthe

humidistatanddehumidierareoperatingcorrectly.

NOTE!Thefancancontinuetorotatewhenthereactivationheaterhasbeenswitchedoffdependingonthe

operationmode.Moreinformationisavailableinchapter4.8,Connectingthehumidistat.

4.AdjustthehumidistatsetpointtothedesiredRHvalue.

5.4Stoptheunit

Tostoptheunit,disconnectitfromthepowersourceorusetheexternalcircuitbreaker.

190TGB-1004–N1402Operation14

MG50&MG90

6Serviceandmaintenance

6.1General

W W

ARNING! ARNING!

ARNING!

-Donotattempttorepair,dismantleormodifythisunit.

-Removethemainsplugfromthesocketbeforestartinganymaintenancework.

Thedehumidierisdesignedforcontinuoususeoveralongperiodoftimewithaminimalamountof

supervision.Undernormaloperatingconditions,maintenancerequirementsareminimal.Theservice

intervaldependsmainlyontheoperationalconditionsandworkingenvironment.

NOTE!ItisrecommendedtocontactMuntersforserviceorrepair.Operatingfaultscanoccuriftheunitis

maintainedinsufcientlyorincorrectly.

MuntersServicecanofferaserviceplanadaptedtosuittheconditionsofaspecicinstallation.Seecontact

addressesonthebackpageofthismanual.

6.2Maintenanceschedule

Muntersrecommendsthefollowingmaintenanceschedule.Theschedulecontainsinspectionand

maintenanceproceduresaswellastherecommendedintervalsforunitsusedundernormaloperatingand

environmentalconditions.Iftheprocessaircontainsalotofdust,preventativemaintenanceshouldbe

performedatshorterintervalsthanthosespeciedbelow .

Inspection/maintenance

Component

3-6months12months

ProcessandReactivationlter.

Cleantheltercassette

(1)

andreplacethelter

asnecessary.

Cleanthelterhousingandreplacethelter

Unithousing.

Checkforphysicaldamageandcleanthe

outsideoftheunitasnecessary.

Checkforphysicaldamageandcleanthe

outsideoftheunitasnecessary.Checkany

lineconnectionstoensuretheyareproperly

attachedandthattherearenoairleaks.

Humidistat.

Nocorrectiveaction/checkChecksensorfunctionsandcalibrateif

necessary.ContactyourMuntersproduct

servicedepartmentasrequired

Functionalityandperformance

check

Nocorrectiveaction/checkPerformacompletefunctionalityand

performancecheck,andreplacewornpartsas

necessary.

(1)

Ensurethatthearrowpointstowardthedehumidierwhenchangingtheltercassette.

Table6.1Maintenanceschedule

15Serviceandmaintenance190TGB-1004–N1402

MG50&MG90

6.3Filterreplacement

1.RemovetheltercassettebyslidingitupwardsaccordingtoFigure6.1.

2.Cleanthelterholderandtanewltercassette.

Figure6.1Removingtheltercassette

190TGB-1004–N1402Serviceandmaintenance16

MG50&MG90

7Faulttracing

SymptomPossiblecauseCorrectiveaction

FailureoftheelectricalsupplyCheckpowersupplytotheunit.

Theunitwassettoautomaticmodeby

mistakewithnohumidistatconnected.

Humidistatfault(automaticmode).

Settomanualoperatingmodeandcheckthatthedehumidier

starts.Iftheunitstarts,theproblemprobablylieswiththe

humidistat.Checkthehumidistatbycheckingthatthe

dehumidierstartswhenthesetpointofthehumidistatis

lowered.Resetthehumidistatsetpointafterthecheck.

Calibratethehumidistatasnecessaryorreplaceit.

Thethermalprotectioninthefanmotorhas

beentriggered.

-Switchofftheunitanddisconnectthepowersupply

-Removetheconnectionpiecesforthehosesorductsandthe

ltercartridgeontheprocessand/orreactivationside.

-Checkthattheimpellerswhicharenowaccessiblerotate

freely.

Unithasstopped.

Thehigh-temperaturefusehasbeen

tripped.

Checkthattheltersandhosesorductsarenotcloggedand

resetthefuse.Beforethefusecanbereset,theunitmustbe

disconnectedfromthepowersourceandthenreconnected

onceithascooled.Theprimarycausesbehindtriggeringofthe

high-temperaturefuseare:

-Faultinthereactivationairow.

-Blockedlter,hoseorduct.

-Blockedimpeller.

Reactivationtemperatureistoolow.Checkthattheoriceplate(A)istted.

Thereactivationheaterisnotoperating.Checkthatthereactivationheaterisworkingbymeasuring

currentconsumption,seechapter8.4,Technicaldata.

ThereactivationairowisincorrectCheckthelterandanyhosesorductsforleakageorblockage.

Theuseofarestrictingangeincombinationwithwallpipes

canalsocauseanincorrectreactivationairow.

Lossofperformance:

Thedehumidieris

inoperationbutisnot

controllingthehumidity.

RotordrivemechanismfaultCheckthroughthedryairoutletthattherotorrotatesatapprox.

10revolutionsperhour.

Table7.1Faulttracinglist

17Faulttracing190TGB-1004–N1402

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Munters MG Owner's manual

Brand: Munters

Model: MG

Category: Dehumidifiers

Type: Owner's manual

Munters MG: Advanced Dehumidification Solutions for Optimal Air Quality

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Munters MG Owner's manual

Munters MG Owner's manual

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