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Munters MG Owner's manual

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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
W
ARNING! ARNING!
ARNING!
Indicatesapossibledangerthatcanleadtopersonalinjury.
CA 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.
Copyright
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...........................
ii
Warranty...............................
ii
Safety..................................
ii
ConformitywithDirectives............
ii
Copyright..............................
ii
Tableofcontents...........................iii
1Introduction.................................1
1.1Aboutthismanual.....................
1
1.2Unintendeduse........................
1
1.3Safety..................................
2
1.4Marking................................
3
2Dehumidierdesign.......................4
2.1Productdescription...................
4
2.2Principleofoperation..................
4
3Transport,inspectionandstorage.......5
3.1Transport..............................
5
3.2Packaginganddeliveryinspection...
5
3.3Storingtheequipment................
5
4Installation...................................6
4.1Safety..................................
6
4.2Siterequirements.....................
6
4.3Connectionofductsandhoses.......
7
4.4Hoselengthandoriceplateaffects
theairow..............................
7
4.5Mountingtheunitonthewall..........
8
4.6Installationexamples.................
10
4.6.1Closedsystem.................
10
4.6.2Opensystem...................
11
4.7Electricalconnections................
12
4.8Connectingthehumidistat............
12
5Operation....................................13
5.1Safety..................................
13
5.2Priortostart............................
13
5.3Start....................................
14
5.3.1Manualoperation..............
14
5.3.2Automaticoperation...........
14
5.4Stoptheunit............................
14
6Serviceandmaintenance.................15
6.1General................................
15
6.2Maintenanceschedule................
15
6.3Filterreplacement.....................
16
7Faulttracing.................................17
8Technicalspecication....................18
8.1Dimensionsandservicespace.......
18
8.2Capacitydiagrams....................
19
8.3Fancurves.............................
20
8.4Technicaldata.........................
21
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
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
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
M
IP44
Figure1.1Identicationplateposition
Type
Fa br. No.
Fa br. yea r
0,09 kW
Max 0,74 kW
0919 190XXX XXXXX
2009
MG90
0
0
·
·
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
R
oHS
M
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
1
2
3
4
5
6
7
A
B
C
D
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
W
ARNING! ARNING!
ARNING!
Donotconnecttheunittoothermainsvoltagethanspeciedontheidenticationplate.
Theunitmustbeconnectedtoanearthedelectricaloutlet.
Donotoperatetheunitifthepowerplugorcordisdamaged.
CA 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.
1
2
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
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
00000
00000
00000
00000
00000
00000
00000
0000
0000
0000
0000
0000
0000
0000
Figure4.5Wallpipe
9Installation190TGB-1004–N1402
MG50&MG90
4.6Installationexamples
4.6.1Closedsystem
Theairintheroomiscirculatedthroughthedehumidier.
1
Figure4.6Closedsystem,dehumidierlocatedintheroom.
1.Dehumidierlocatedintheroom:
Thewetairoutletisconnectedtoahoseandisthenemittedoutside
theroom(outdoors).Thereactivationairistakenfromtheoutsidevia
ahoseorductconnectedtoaconnectionpiece.
NOTE!Ashorthose(~0.3m)onthedryairoutlet
canimproveaircirculationandeliminatetheriskof
short-circuitingdryairandprocessair.
2
Figure4.7Closedsystem,dehumidierlocated
outsidetheroom.
2.Dehumidierlocatedoutsidetheroom:
Theprocessairistakenfromthedehumidiedroomviaahoseorduct
connectedtoaconnectionpiece.Thedryairisemittedintotheroom
throughahoseconnectedtoaconnectionpiece.
3
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.
1
Figure4.9Opensystem,dehumidierlocated
outsidetheroom.
1.Dehumidierlocatedoutsidetheroom:
Dryairisemittedintotheroomviaahoseorductconnectedtoa
connectionpiece.
2
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.
1
Figure4.12Humidistatconnectionsocket(1)
Aroomhumiditysensoristobemounted1-1.5mabovetheoor.Itmustbepositionedsothatitisnot
directlyexposedtodryairfromtheunitortohumidairowinginthroughopeningdoors.Positionitaway
fromheatsourcesanddirectsunlight.
Thehumidistatmustbeasingle-stagehumidistatandconnectedsothatthecontrolcircuitcloseswhen
relativehumidityincreases.Theconnectioncablemustbescreenedandequippedwithacopperconductor
withaminimumcross-sectionareaof2x0.75mm
2
.
Iftheunitisusedtogetherwithanexternalhumidistat,operationmodeAorBcanbeused.
ModeA:ThehumidistatregulatestheentiredehumidierON/OFF(standardmode).
ModeB:Thehumidistatonlyregulatesthereactivationheaterandthefanoperatescontinuously.
ContactMuntersforchangingtheoperationmode.
190TGB-1004–N1402Installation12
MG50&MG90
5Operation
5.1Safety
W W
W
ARNING! ARNING!
ARNING!
Donotoperatetheunitifthepowerplugorcordisdamaged.
Donotinsertngersoranyotherobjectsintotheairvents.
Theunitcanrestartautomaticallywithoutwarningfollowingapowerfailure.
CA 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.
1
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
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
/