Munters Desicool Owner's manual

Brand: Munters

Model: Desicool

Type: Owner's manual

Originalinstructions

Operatingmanual

DesiCool™

AirTreatmentSystem

TEN-DSC-D1401©MuntersEuropeAB2014

Tableofcontents

Tableofcontents...........................ii

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

1.1Denition...............................

1.2Aboutthismanual.....................

1.3Warnings...............................

1.4Warranty...............................

1.5Inspectionofdelivery..................

1.6Technicaldata.........................

2Safety.........................................3

2.1Intendeduse...........................

2.2Safeinstallation,operationand

maintenance...........................

2.2.1Electricalhazard...............

2.2.2Physicalhazard................

2.2.3Propertyhazard................

2.3Residualrisks..........................

2.4Warningsigns.........................

2.5Emergencystop.......................

3Systemdesignandfunction..............9

3.1Mainfunction..........................

3.2Systemdesign.........................

3.3Basicsensorslayout..................

3.4Pre-andpost-treatment..............

4Maincomponentsdescription............13

4.1Desiccantrotor........................

4.1.1Function........................

4.1.2Rotormaintenance............

4.1.3Rotorseals,drivebeltanddrive

motor...........................

4.2Thermalrecoveryrotor................

4.2.1Function........................

4.2.2Rotor............................

4.2.3Rotorseals,drivebeltanddrive

motor...........................

4.3Watercoils.............................

4.3.1Coolingcoils....................

4.3.2Heatingcoils...................

4.3.3Frostprotection................

4.3.4Dropletseparator..............

4.3.5Cleaning........................

4.3.6Stoppingwaterowtothe

coils.............................

4.4Evaporativecoolers/humidiers.....

4.5Fans....................................

4.5.1Fantypes.......................

4.5.2Maintenance...................

4.6Filters...................................

4.6.1Filtertypes......................

4.6.2Filtermaintenance.............

4.6.3Panellters.....................

4.6.4Baglters.......................

4.7Dampers...............................

4.8Flexibleconnections..................

5Commissioning............................24

5.1Checksbeforestartingup.............

5.2Inspectionofevaporativecoolers....

5.3Startingup.............................

6Serviceandmaintenance.................26

6.1Safety..................................

6.2General................................

6.3Serviceoptions........................

6.4Extendedwarranty....................

6.5Serviceandmaintenanceschedule..

7Scrapping....................................31

8Supplements................................32

9ContactMunters............................33

iiTableofcontentsTEN-DSC-D1401

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1Introduction

1.1Denition

TheAirTreatmentSystemdescribedinthismanualishereafterreferredtoasthe“unit”.

1.2Aboutthismanual

Thisinstructionmanualcontainsimportantsafetyinformation,aproductdescriptionandmaintenance

instructionsforthedeliveredairtreatmentunit.Readallrelevantpartsofthismanualbeforeoperatingor

performinganyworkontheunit.Observanceofthisinformationwillhelpyoutoavoiddanger,tominimise

repaircostanddowntime,andtoincreasethereliabilityandtheservicelifeoftheairtreatmentunit.

Thismanualshouldbestoredinapermanentlocationclosetotheunit.

Thismanualdoesnotdescribeinfullallthemaintenanceworkrequiredtoguaranteethelongevityand

reliabilityofthistypeofequipment.AlwayscontactMuntersforserviceandrepairs,toensuresafeandlong

lastingoperationoftheunit.

Thecontentsofthismanualcanbechangedwithoutpriornotice.

NOTE!Thismanualcontainsinformationwhichisprotectedbycopyrightlaws.Itisnotallowedtoreproduceor

transmitanypartofthismanualwithoutwrittenconsentfromMunters.

Pleasesendanycommentsregardingthismanualto:

MuntersEuropeAB

TechnicalDocumentation

P.O.Box1150

SE-16426KISTASweden

e-mail:[email protected]

1.3Warnings

Informationaboutdangersareinthismanualindicatedbythecommonhazardsymbol:

W W

ARNING! ARNING!

ARNING!

Indicatesapossibledangerthatcanleadtopersonalinjury.

CA CA

UTION! UTION!

UTION!

Indicatesapossibledangerthatcanleadtodamagetotheunitorotherproperty,orcauseenvironmentaldamage.

NOTE!Highlightssupplementaryinformationforoptimaluseoftheunit.

1.4Warranty

ThewarrantyisbasedonthetermsofsaleanddeliveryofMunters.Thewarrantyisnotvalidifrepairsor

modicationsarecarriedoutwithoutthewrittenagreementofMunters,oriftheunitdoesnotoperateunder

theconditionsagreedwithMunters.Damagesresultingfromnegligence,poormaintenanceorfailureto

complywiththerecommendationswillnotbecoveredbythewarranty.

TEN-DSC-D1401Introduction1

DesiCool

Itisaconditionofthewarrantythattheunitforthefullwarrantyperiodisservicedandmaintainedbya

qualiedMuntersengineerorMuntersapprovedengineer.Accesstospecicandcalibratedtestequipment

isnecessary.Theserviceandmaintenancemustbedocumentedforthewarrantytobevalid.

Thewarrantyislimitedtoafreeexchangeofpartsorcomponentswhichhavefailedasaresultofdefects

inmaterialsorworkmanship.

Commissioning/Start-upinspection"S"byMuntersismandatorytovalidatethefullwarranty.

AlwayscontactMuntersforserviceorrepair.Operatingfaultscanoccuriftheunitismaintained

insufcientlyorincorrectly.

1.5Inspectionofdelivery

Uponreceipt,inspecttheequipmentbeforesigningthedeliverynote.Specifyanydamageonthedelivery

noteandsendaregisteredletterofcomplainttothelastcompanyresponsiblefortransportingthe

equipmentwithinthreedays.InformMuntersofthiscomplaint.

Theunitmustbefullyinspectedwithinoneweekfromarrival.Ifahiddenfaultisdiscovered,senda

registeredletterofcomplainttothehaulierwithintheweekfollowingdelivery,andnotifyMuntersofthis.

1.6Technicaldata

ThetechnicaldataforaspecicunitcanbefoundintheseparateDatasheetissuedforeachunit.

2IntroductionTEN-DSC-D1401

DesiCool

2Safety

2.1Intendeduse

TheunitdeliveredbyMuntersmustonlybeusedforthetreatmentofair.Thisincludesltering,heating,

cooling,humidifying,dehumidifyingandtransportingair.Muntersexplicitlyrulesoutanyotheruse.

Theunitisdesignedtomeetthesafetyrequirements,directivesandstandardslistedintheECDeclarationof

Conformity.

NomodicationoftheunitisallowedwithoutpriorapprovalbyMunters.Attachmentorinstallationof

additionaldevicesisonlyallowedafterwrittenagreementbyMunters.

TheconditionsofoperationspeciedintheseparateDatasheetmustbeobservedabsolutely.Anyotheruse

oftheequipmentcancausepersonalinjuryanddamagetotheunitandotherproperty.

2.2Safeinstallation,operationandmaintenance

Greatefforthasbeenplacedonthedesignandmanufactureoftheunit,tocomplywithapplicablesafety

aspectsforthistypeofequipment.

Theinformationinthismanualincludessuggestionsforbestworkingpracticeandshallinnowaytake

precedenceoverindividualresponsibilitiesorlocalregulations.

Duringoperationandotherworkwithamachineitisalwaystheresponsibilityoftheindividualtoconsider:

■Thesafetyofallpersonsconcerned.

■Thesafetyoftheunitandotherproperty.

■Theprotectionoftheenvironment.

Alwayscarryoutriskassessmentsbeforedoinganyworkontheunit.

TEN-DSC-D1401Safety3

DesiCool

2.2.1Electricalhazard

Figure2.1Electricalhazard

Figure2.2Secureagainstreconnection

W W

ARNING! ARNING!

ARNING!

Installation,adjustments,maintenanceandrepairsmustonlybecarriedoutbyqualiedpersonnelwhoare

awareoftherisksinvolvedwhenworkingwithequipmentoperatingwithhighelectricalvoltageandhighmachine

temperatures.

W W

ARNING! ARNING!

ARNING!

Donotopendistributionboxesorotherelectricalconnectionboxes.Theunitisconnectedtohighvoltagewhich

cancauseseriousinjuryordeath.

W W

ARNING! ARNING!

ARNING!

Beforedoinganyserviceormaintenanceworkontheunitmakesurethatallelectricalequipmentisdisconnected

fromthepowersupply,andsecuredagainstreconnection.

W W

ARNING! ARNING!

ARNING!

Theunitmustneverbeconnectedtoavoltageorfrequencyotherthanthatforwhichitwasdesigned.Refertothe

unitidenticationplate.

W W

ARNING! ARNING!

ARNING!

Anyexternalelectricalequipment,forexampleaportablelamp,mustbeconnectedtoanearthfaultbreaker.

W W

ARNING! ARNING!

ARNING!

Commissioningandinitialstart-upoftheunitmustbecarriedoutbyauthorizedpersonnelonly.

4SafetyTEN-DSC-D1401

DesiCool

2.2.2Physicalhazard

W W

ARNING! ARNING!

ARNING!

Rotatinghazard.Theunitcontainsrotatingfansandothermovingparts.

Topreventpersonalinjury,theunitmustberunwithallpaneldoorsclosedandallremovablepanelsandprotective

gridsproperlyinplace.Neveropenthedoorsorpanelsbeforeallfansandothermovingpartshavecometoa

completestop,andthemainpowerisswitchedoff.

Fansandothermovingpartscanstartautomaticallyandwithoutwarning.

W W

ARNING! ARNING!

ARNING!

Theunitsectionsareheavy.Useonlyapprovedliftingequipmentadaptedtotheweightofthesectionstoavoid

accidents.

W W

ARNING! ARNING!

ARNING!

Makesurethatallpipecouplingsareproperlytightenedbeforethemediumsupplyforcoolingorheatingcoils

isturnedon.

W W

ARNING! ARNING!

ARNING!

Cleaningagents,coolingmedia,oilandgreasearesubstancesthataredangeroustopersonalhealthandtothe

environment.Theymustnotbeallowedtodrainawayintothesoilorthepublicsewersystem.Thedisposalofsuch

substancesmustbeeffectedinaccordancewithlocalandnationallawandregulations.

TEN-DSC-D1401Safety5

DesiCool

2.2.3Propertyhazard

CA CA

UTION! UTION!

UTION!

Theunitisnotintendedforuseinclassiedareas,norfortreatingairpollutedwithsolvents,dustorother

aggressive,corrosiveorabrasiveparticles.

CA CA

UTION! UTION!

UTION!

Failuretocorrectlyadjusttheairowscancausemalfunctionoftheunit.

Anydamagetotheunitresultingfromincorrectadjustmentoftheairowscaninvalidatethewarrantyoftheunit.

Theunitmustnotberunformorethanafewminutesbeforesettingupthecorrectairows.

CA CA

UTION! UTION!

UTION!

Serviceandmaintenanceworkshouldonlybecarriedoutbyqualiedandtrainedpersonnel.Operatingfaultscan

occuriftheunitismaintainedinsufcientlyorincorrectly.

CA CA

UTION! UTION!

UTION!

Neverclimbontheunitoruseitasscaffolding.

6SafetyTEN-DSC-D1401

DesiCool

2.3Residualrisks

Inordertoavoidthepossibledangersinoperatingormaintainingtheunit,necessaryprotectionshavebeen

foreseen.However,therearestillsomeresidualrisksthatallpersonnelworkingwiththeunitmustbeaware

of:

Thehandlingofuidsinrefrigerating,heatingorcoolingcircuitscanbedangerous.Studytheinformation

relevantforeachtypeofuidtoavoiddangers.

Hotorcoldsurfacescancauseinjuries.Beforeintervening,waituntiltemperaturesbecomenormaloruse

protectiveclothing.

Whenworkinginsidetheunit,payattentiontothepossibleergonomicdangersfrominadequatework

positionsorheavylifts.

Unitsectionscanbehigh.Usesecurescaffoldingtoaccesstheupperlevel.

Unitpanelscanbeheavy.Donothandlealone.

Sharpsteeledgesonboxesorcoilscancausecuts.Useprotectivegloves,particularlyduringdisassembly

orassembly.

Whenworkingwithornearfans,beawarethatremainingairowthroughtheunitcancausespontaneous

rotationofthefansandtherebycausingpersonalinjury.

Doorsforoverpressurecompartmentscanbeequippedwithadditionalsafetylocksagainstaccidental

opening.Ensurethatsuchlocksareclosedbeforestartingtheunit.

Thereand/orsmokedetectionisnotasafetyfunctioninrelationtotheENISO13849-1.

Whenworkingwithltersorinadustyarea:Toprotecttheuserfromdust,wearasuitableCEmarkedface

maskselectedandttedinaccordancewiththeapplicablesafetystandards.

Usehearingprotectionaccordingtoapplicablesafetystandardswhenworkinginanoisyenvironmentto

avoidhearingimpairment.

Dampersopenandcloseautomatically.Keephandsclearofthedamperswhentheyaremoving.

TEN-DSC-D1401Safety7

DesiCool

2.4Warningsigns

Thefollowingwarningsignscanbepresentontheunit,towarntheusersofresidualriskswhichcancause

seriousinjuryordeath.Makesurethatallpersonnelworkingwithorneartheunitareawareofthemeaning

ofeachsign.

Figure2.3Riskofelectrical

shock.

Figure2.4Hotairowor

surface.

Figure2.5Unitstarts

automatically.

Figure2.6Pinchhazard.

2.5Emergencystop

Theunitcaninanemergencybestoppedusingthemainpowerswitch.

CA CA

UTION! UTION!

UTION!

Onlyusethemainpowerswitchtostoptheunitinthecaseofanemergency.Thenormalshutdownsequencewill

notbefollowed.Thefansstopandtheheatercanbeveryhot,whichcanresultindamagetotheheaterandother

componentsclosetoit.

8SafetyTEN-DSC-D1401

DesiCool

3Systemdesignandfunction

3.1Mainfunction

TheDesiCool™airtreatmentsystemisahighlyefcientenergyrecoveryventilationsystem.Ituseslow

costorsurplusheattocreateamorecomfortableindoorclimate.

TheDesiCoolcombinesMuntersadvanceddesiccantdehumidicationtechnologywithevaporative

cooling.

Insummertheunitkeepstherelativehumidityintheroomlowerthanasetsummermaximumvalue,and

alsocontrolsthesupplytemperaturetothesetvalue.

Inwintertheunitkeepsthesupplytemperatureatthesetvaluebyrecoveringheatfromtheexhaustair,while

atthesametimecontrollingtheroomhumiditynottobelowerthanaminimumsetvalue.

3.2Systemdesign

1 2

4 5

7 8

1112

Figure3.1DesiCoolsystemdesignexample*

1Supplydamper6Thermalrecoveryrotor11Bypassdamper

2Supplylter7Heatingandcoolingcoils12Reactivationheater

3Desiccantrotor8Evaporativecooler13Exhaustfan

4Bypassdamper9Exhaustlter14Exhaustdamper

5Processfan10Evaporativecooler

*Individualsystemsarebuilttospecication,andcanbedifferentfromthisexample.

ThereareseveralpossibleoperationmodesfortheDesiCoolsystem.Dependingontheoutside

temperatureandhumidity,andonthesupplysetpoints,thecontrollerwillactivatethecomponentsas

needed.

TEN-DSC-D1401Systemdesignandfunction9

DesiCool

Insummertimetheunitproducescoolanddehumidiedairbyadesiccantcoolingprocess.Theambientair

isdehumidiedinthedesiccantrotor.Thisprocessincreasestheairtemperature.Inthethermalrecovery

rotortheairisindirectlycooledbytheevaporativecoolerintheexhaust.Finally,theairisfurthercooled

directlybytheevaporativecoolerinthesupply.

Thereisaheaterintheexhaustairstreamforreactivationofthedesiccantrotor.Seethemoredetailed

descriptioninsection4.1,Desiccantrotor.

Inwintertimetheunitproduceswarmair.Thethermalrecoveryrotorstartstorotateandrecoversheat

fromtheexhaustairstream.Ifmoreheatrecoveryisrequiredthedesiccantrotoralsostartstorotateand

recoversbothheatandmoisture.Atextremeambientwinterconditionsthehotwatercoilinthesupplyis

alsoinoperation.

Throughtheuseofbypassdampersitispossibletooptimizethewaytheairistreated.

10SystemdesignandfunctionTEN-DSC-D1401

DesiCool

3.3Basicsensorslayout

Figure3.2DesiCoolbasicsensorslayoutexample

1.DifferentialpressureswitchonlterPSW16.DifferentialpressureswitchonlterPSW2

2.InputtemperatureandRHsensorTHS17.ReactivationtemperaturesensorTS11

3.FlowcontroldifferentialpressuresensorDP48.AntifreezethermostatTS9

4.AntifreezethermostatTS109.FlowcontroldifferentialpressuresensorDP3

5.SupplytemperaturesensorTS2

DH.Dehumidicationrotor

TH.Thermalrecoveryrotor

TEN-DSC-D1401Systemdesignandfunction11

DesiCool

3.4Pre-andpost-treatment

Pre-andpost-treatmentoftheprocessaircanbeperformedbythefollowingfunctionalcomponents:

■Inletdamperstoenableisolationoftheunitfromtheairow.Thedampersareinstalledontheoutside

oftheunit.

■Heatingcoil:Thecoilcanbeelectricorusehotwaterorsteamasheatingmedium.Thecoilmustthen

beconnectedtoanexternalheatingmediumsupply.Itispossibletoactivateapumpfromthecontrol

system.

■Coolingcoil:Thecoiluseschilledwater,possiblymixedwithglycol.Thecoilmustbeconnectedtoan

externalmediumsupply.Thecontrolsystemregulatesanactuatortomaintaindewpointandorcooling

setpoint.Itispossibletoactivateapumpand/orachillerfromthecontrolsystem.

■Filtersforvariousairqualityspecications.Filterscanbeequippedwithpressuredropsensorstoenable

"blockedlter"alarm(option).

CA CA

UTION! UTION!

UTION!

Coilsmustbefrostprotectedwhenthereisariskoffrost.Seesection4.3.3,Frostprotection.

12SystemdesignandfunctionTEN-DSC-D1401

DesiCool

4Maincomponentsdescription

NOTE!Somecomponentsareoptional,andindividualsystemspecicationsmaydiffer.

Allcomponentpicturesareexamples,andmaynotcorrespondtoindividualunits.

4.1Desiccantrotor

4.1.1Function

Figure4.1Rotorprinciple

1.Processair

2.Dryair

3.Reactivationair

4.Wetair

Therotoristheadsorptiondehumidifyingcomponentintheunit.Therotorstructureiscomprisedofa

largenumberofsmallairchannels.

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.

Therotorismonitoredbyarotationsensortoenableanalarmiftherotorstopsunintentionally.

TEN-DSC-D1401Maincomponentsdescription13

DesiCool

4.1.2Rotormaintenance

Therotorsurfacemustbeinspectedregularly.Performpressuredropmeasurementstofollowrotoraging.

Thedesiccantrotorwillnotbereplacedpreventively,capacitymonitoringwillindicatewhenrotor

replacementisnecessary.

4.1.3Rotorseals,drivebeltanddrivemotor

Therotordrivemotor,drivebeltandsealsshouldbereplacedifnecessary,oratthemaximumintervals

accordingtothemaintenanceschedule.

Belttensioncanbeadjustedbyshorteningthebelt.

Rotorsealsmustbecheckedandadjustedonceperyear.

14MaincomponentsdescriptionTEN-DSC-D1401

DesiCool

4.2Thermalrecoveryrotor

4.2.1Function

Figure4.2Thermalrecoveryrotor

Thethermalrotoris,dependingontheambientconditions,usedeitherforcoolingorforheatingofthe

supplyair.Thisisdonebyexchangingheatbetweenthesupplyairstreampassingthroughthelowerhalfof

therotor,andtheexhaustairstreampassingthroughthetophalfintheoppositedirectionwhiletherotor

rotates.

Thethermalrotorismanufacturedfromaluminiumwithmanysmallchannelsthroughwhichtheairpasses,

makingalargecontactsurfacetotransfertheheat.

Therotorisdrivenbyanelectricmotorandadrivebeltaroundthecircumferenceoftherotor.

4.2.2Rotor

Therotorsurfacemustbeinspectedregularly.

Iftherotorisdirtyitcanbecleanedwithavacuumcleaner,orwithlowpressurecompressedairifnecessary.

4.2.3Rotorseals,drivebeltanddrivemotor

Thedrivebeltmustbecheckedaftertherst100hoursofoperation.

Therotordrivemotor,drivebeltandsealsshouldbereplacedifnecessary,oratthemaximumintervals

accordingtothemaintenanceschedule.

Belttensioncanbeadjustedbyshorteningthebelt.

Theclearancebetweentherotorsurfaceandthesealsmustbecheckedduringinspection.Adjustthesealsif

necessary.

TEN-DSC-D1401Maincomponentsdescription15

DesiCool

4.3Watercoils

4.3.1Coolingcoils

Coolingcanbesuppliedbyoptionalcoldwatercoilsinstalledinthepre-andorpost-treatmentsections.

Thecoiluseschilledwater,possiblymixedwithglycol,ascoolingmedium.Thecoilmustbeconnected

toanexternalmediumsupply.

CA CA

UTION! UTION!

UTION!

Hotandcoldwatersupplylinesmustonlybedesignedandexecutedbyqualiedpersonneltakingintoaccount

therespectiverelevantlocalregulations.

Whenthereisariskoffrost,thewatercoilsmustbefrostprotected.Seesection4.3.3,Frostprotection.

4.3.2Heatingcoils

Heatingcanbesuppliedbyoptionalhotwatercoilsinstalledinthepre-andorpost-treatmentsection.

Thecoiluseshotwaterorsteamasheatingmedium.Thecoilmustbeconnectedtoanexternalheating

mediumsupply.

CA CA

UTION! UTION!

UTION!

Hotandcoldwatersupplylinesmustonlybedesignedandexecutedbyqualiedpersonneltakingintoaccount

therespectiverelevantlocalregulations.

Whenthereisariskoffrost,thewatercoilsmustbefrostprotected.Seesection4.3.3,Frostprotection.

4.3.3Frostprotection

Ifthewaterinacoilfreezesthiscouldcauseseriousdamage.Afrozencoilmustalmostalwaysbereplaced.

Theguaranteeisnolongervalidevenifthecracksarenotvisible.

Ifthereisariskoffrost,thecoolingmediummustbeenrichedwithglycolorananti-freezeheatercomplete

withanti-freezethermostatmustbeinstalled.

4.3.4Dropletseparator

Figure4.3CoolingcoilA A

anddropletseparatorB B

Acoolingsectioncanbeequippedwithadropletseparatortoremovedropletcarry-overfromthecooling

coil.

16MaincomponentsdescriptionTEN-DSC-D1401

DesiCool

Thedropletseparatorisbuiltfromapatentedthree-plane-utedpadthatissetatanangletotheowofair.

Theseparatorabsorbsthewaterdropletsandtransportsthemdownthroughthematerialtothedrainage

section.

4.3.5Cleaning

W W

ARNING! ARNING!

ARNING!

Coilnshavesharpedges.Alwayswearprotectivegloveswhenworkingwithcoils.

1.Thecoilsshouldbecheckedatleastonceayear,andcleanedifrequired.

2.Someofthedustwhichpassesthroughthelterscomestorestonthecoilcells.Thislayerofdust

affectstheairowandreducestherateofexchangeleadingtodecreasedunitefciency.

3.Thecoilsshouldthereforebekeptclean.Cleaningcanbedonebyusingavacuumcleaner,lowpressure

compressedairorlowpressurewaterandasoftbrush.Donotforgettocleantheunitinternallyafterthe

coilcleaning.NeveruseHPcleaners,thiswilldamagethecoilns.

4.Furthermore,inthecaseofcoolingcoils,cleanthedriptrayandsiphonforthecondensationwateronce

peryear.Notethatsiphonsneedtoberelledwithwaterafterthewinterseason.

4.3.6Stoppingwaterowtothecoils

Precautionstotakeincaseoffrostrisk:

-whereitisenvisagedtostoporconsiderablyreducetheowofhotwater,allthefreshairintakesmust

beclosedandtheventilationstopped.

-thereferencepointoftheantifreezethermostatmustnotbesettoolow.

-ifforwhateverreasonabuildingisnotheatedinwinter,thecoilsaswellasthepipingmustbeemptied.

Hotwatercoils

Makesurethatthetemperatureofthehotwaterisnottoolow,andthatthecirculationofthewateris

maintained.Ensurethat:

■thevalvesareopen.

■thepipingispurgedfromremaininggases.

■thehotwatercirculationpumpoperatesevenatnight.

Coolingcoils

Coolingcoilsmustbepurgedifthepassingairtemperatureislowerthanthefreezingpointofthecoolant.

Wherethecoilsaresuppliedwithwaterwhichdoesnotcontainglycol,andnopreheatercoilisinstalled,itis

thereforenecessarytoemptythecoilsassoonasthepassingairtemperaturereaches0°C.

TEN-DSC-D1401Maincomponentsdescription17

DesiCool

4.4Evaporativecoolers/humidiers

Evaporativecoolers/humidiersareplacedbothinthesupplyandexhaustairstreams.

Theycanhaveeitheradirectwatersupply,orarecirculatedsystem.

TheheartoftheFA6cooler/humidierisacassettemadefrominorganicevaporativemedia–GLASdek®.

Waterissuppliedtothetopoftheevaporativemediaviaadistributionheader.Thewaterowsdown

thecorrugatedsurfaceofthemedia.Asthewarmanddryairpassesthroughthemediaitevaporatesa

proportionofthewaterandthusproducescool,humidiedair.Therestofthewaterassistsinwashingthe

media,andisdrainedbacktothetank.Inthecaseofarecirculatedsystem,theremustbeableed-offandan

automaticdrainageinordertoavoidcontaminationofthewater.

Theenergythatisneededfortheevaporationistakenfromtheairitself.Theairthatleavesthehumidieris

thereforehumidiedandcooledsimultaneouslywithoutanyexternalenergysupplyfortheevaporation.

Thisisinessencetheadiabaticcoolingprocess.Itisveryefcientandtheconsumptionofenergyisverylow.

Periodicmaintenanceofthecoolersisrecommendedonceayear,followingtheoperatingseason.

Figure4.4Openthesafetycatchonthedistributionheaderbyturningaquarterturn

1.Cleanthedistributionheader.

2.Cleanthepumplter.

3.Cleanthereservoir.

4.Checkthefunctionofthelevelswitch.

5.Checkthefunctionofthebleed-offvalve.

18MaincomponentsdescriptionTEN-DSC-D1401

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Munters Desicool Owner's manual

Munters Desicool Owner's manual

Munters Desicool Owner's manual

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