mundoclima MUEN-30-H6T Service manual

MODULAR CHILLER MUEN-H6
Installation & Owner's manual
English
CL25616
MUEN-30-H6T
www.mundoclima.com

NO.
NAME
1 2 3 4 5 6
Top coverAiroutlet Airinlet Waterinlet Electric
control box
Wateroutlet
MAINPARTSOFTHEUNIT
3 1
2
4
5 6
3

OPERATION&PERFORMANCE
a. Thestandardvoltageofpowersupplyis380-415V3N~50Hz,theminimumallowablevoltage is342V, andthemaximumvoltageis
456V.
b. Tomaintainbetterperformance,pleaseoperatetheunitunderthefollowingoutdoortemperature:
Operating range undercooling mode Operating range underheatingmode
-10 C~46 C -10 C~21 C
c. Theunitisof outlet watertemperaturecontrolmode
outletwatertemperaturecontrol cooling: minimumtemperature5 C,maximumtemperature17 C;heating: minimumtempera-
tureC,maximumtemperature50 C.
Performance characteristics oftheunit
Use conditionsoftheunit
Theair-cooledheatpumpmodularunitiscomposedofoneormoremodules.Eachmodulehasitsownindependentelectric
controlunit, andtheelectriccontrolunitsofmodulesconductinformationexchange through communicationnetwork.The
air-cooledheatpumpmodularunit ischaracteristicsofcompactstructureandeasytransportationandlifting,andinthemeanwhile,
italsosavesfacilities,includingcoolingtower, coolingpump, andsoon, fortheuser, andreducesinstallationcost.
Theunitsprovidecentralairhandlingdevicesorterminalequipmentwithchilledwaterorhotwater.Theunitisacompletely
independententiretytypeone,whichisdesignedtobeinstalledoutdoors(onthegroundorthe roof).Eachunit includessuchmain
partsashigh-efficientandlow-noisescrollcompressor,air-cooledcondenser,shell andtube(orplate)evaporator, micro-computer
controlcenter, andsoon. Thesepartsareinstalledonsteelstructurebase, sotheyaresoundanddurable.
TheunitappliesChinesemicro-computercontrolsystem,whichcanautomaticallyconductenergycontrolaccordingtothe
magnitudeofload,toachieveoptimalmatching andthusactuallyrealizingoptimalenergy-savingoperation.Theproductis
modularized unit, andparallelconnectionof16modulescanberealizedatmost,sotheusercanadoptmodulecombination
according hisowndemands.Theproductcan bewidelyappliedinair-conditioningengineeringofvariousnewly-builtandrebuilt
industrialandcivil buildings,suchasrestaurant,hotel,apartment,officebuilding,hospital,industrialplant,andsoon.The
air-cooledheatpumpmodularunitisthebestchoicefortheplacewhichhashighrequirementinnoiseandambientenvironment
andwhichisshort of water.
Cooling low water temperature
（Unit:℃）
Ambient
temperature
Outlet water
temperature
Cooling operating range
46
-10
Heating low water temperature
（Unit:℃）
Ambient
temperature
Outlet water
temperature
Heating operating range
21
Low water outlet temperature control—cooling: minimum temperature 0℃, maximum temperature 17℃(under this using condition,
the system must be added antifreeze agent); heating: minimum temperature 22℃, maximum temperature 50℃.
40
To activate low water outlet temperature control should be set the micro-switches on the
main PCB (see settings on page 12 of this manual).

1.PRECAUTIONS
Topreventinjurytotheuserorotherpeopleandproperty
damage,thefollowing instructionsmustbefollowed. Incorrect
operationduetoignoringofinstructionsmaycause harmor
damage.
Ask yourdealerforinstallationoftheairconditioner.
Incompleteinstallationperformedbyyourself mayresult ina
waterleakage, electricshock, andfire.
Ask yourdealerforimprovement, repair,andmaintenance.
Incompleteimprovement,repair,andmaintenancemay
resultinawaterleakage,electricshock, andfire.
Inordertoavoidelectricshock, fireorinjury,orif youdetect
anyabnormalitysuchassmelloffire,turnoff thepower
supplyandcall yourdealerforinstructions.
Neverreplaceafusewiththatofwrongratedcurrentor
otherwireswhenafuseblowsout.
Useofwireorcopperwiremaycausetheunit tobreakdown
orcauseafire.
Donotinsert fingers,rodsorotherobjectsintotheairinletor
outlet.
Whenthefanisrotatingat highspeed,itwillcauseinjury.
Neveruseaflammablespraysuchashairspray,lacqueror
paintneartheunit.
Itmaycauseafire.
CAUTION
Donot usetheairconditionerforotherpurposes.
Inordertoavoidanyqualitydeterioration,donotusetheunit
forcooling precisioninstruments,food,plants,animalsor
worksof art.
Beforecleaning,be suretostop the operation,turnthe
breakeroff orpull out the supplycord.
Otherwise,anelectricshock andinjurymayresult.
Inordertoavoidelectricshockorfire,makesurethatan
earthleakdetectorisinstalled.
Besuretheairconditionerisgrounded.
Inordertoavoidelectricshock,makesurethatthe unitis
groundedandthattheearthwireisnotconnectedtogasor
waterpipe, lightningconductorortelephoneearthwire.
Inordertoavoidinjury,donotremovethefanguardofthe
outdoorunit.
Donot operatetheairconditionerwithawet hand.
Anelectricshockmayhappen.
Donot touchtheheatexchangerfins.
Thesefinsaresharpandcouldresultincuttinginjuries.
Neverinspect orservicetheunit byyourself.
Ask aqualifiedservicepersontoperformthiswork.
Donotdisposethisproductasunsorted municipal
waste.Collectionofsuchwasteseparatelyforspecialtreatment
isnecessary.
Keepfarawayfromhigh-frequency equipment.
Keepawayfromthefollowingplaces:
aplacewhereitisfull ofoilgas;placeswheresaltyair
surrounding(nearthecoast);aplacewhereiscausticgas(the
sulfideinhotspring).Locationinthefollingplacesmaycause
malfunctionorshortenthelifespanof themanchine.
Inthecaceofextremelystrong wind,pleasepreventtheair
fromflowingbackwardsintotheoutdoorunit.
Snowcanopyisnecessaryinsonwfallplacesontheoutdoor
unit. Pleaseconsult thelocaldealerfordetails.
Inthe frequentthunderstruck place,lightningproofactions
shouldbe taken.
Topreventrefrigerantleak, contact yourdealer.
Whenthesystemisinstalledandrunsinasmallroom,itis
requiredtokeeptheconcentrationoftherefrigerant, ifbyany
chancecomingout,belowthelimit.Otherwise,oxygeninthe
roommaybeaffected,resultinginaseriousaccident.
Therefrigerantintheairconditionerissafeandnormallydoes
notleak.
Iftherefrigerantleaks intheroom,contactwithafireofa
burner,aheateroracookermayresult inaharmfulgas.
Turnoffanycombustibleheatingdevices,ventilatetheroom,
andcontactthedealerwhereyoupurchasedtheunit.
Donotusetheairconditioneruntilaservicepersonconfirms
thattheportionwheretherefrigerant leaksisrepaired.
WARNING
WARNING
Failuretoobserveawarningmayresult in death.
CAUTION
Thesafetyprecautionslistedherearedividedintotwocategories.In
eithercase,importantsafetyinformationislistedwhichmust beread
carefully.
Failuretoobserveacautionmayresultinjuryordamage
totheequipment.
CONTENTS PAGE
PRECAUTIONS..........................................................................1
TRANSPORTATION....................................................................................2
INSTALLATIONOFTHEUNIT.....................................................................3
WATERSYSTEMINSTALLATION..............................................................5
ELECTRICWIRING..................................................................................10
TRIALRUN..............................................................................................15
USE.........................................................................................................16
MAINTENANCEANDUPKEEP..................................................................20
APPLICABLEMODELSANDMAINPARAMETERS...............................25
ATTACHED DRAWING (I)......................................................................26
Installation & owner's manual Modular Chiller MUEN-H6
1
WIRE CONTROLLER (KJR-120D/BMK-E) ................................................ 27

Afteralonguse,checktheunitstandandfittingfordamage.
Ifdamaged, theunitmayfalland resultininjury.
Toavoidoxygendeficiency,ventilatetheroomsufficientlyif
equipmentwithburnerisusedtogetherwiththeair
conditioner.
Arrange thedrainhosetoensuresmoothdrainage.
Incompletedrainage maycausewetting ofthebuilding,
furnitureetc.
Neverexposelittlechildren,plantsoranimalsdirectlytothe
airflow.
Adverseinfluencetolittlechildren,animalsandplantsmay
result.
Noticetoavoidplaceswhereoperationnoisemayeasilybe
spreadawayorbeenhanced.
Noisecanbeamplifiedbyanythingblockingtheairoutletof
outdoorunit.
Chooseaproperplacethatthenoiseandhotorcoldwind
blownoutoftheoutdoorunitwillnotbringinconvenienceto
yourneighborsandnot affectthegrowthoranimalorplant.
Recommending locateandoperatethe equipmentatthe
altitudeheightnot exceededthan1000m.
2.TRANSPORTATION
Endurabletemperatureduringtransportationis-25 C~55 C.
Suchequipmentcould endure70 Cofthe maximum
temperaturein24hrs.
Donotallowachildtomountontheoutdoorunitoravoid
placinganyobject onit.
Fallingortumblingmayresultin injury.
Donotoperatethe airconditionerwhenusingaroom
fumigation-typeinsecticide.
Failuretoobservecould causethechemicalstobecome
deposited intheunit,whichcouldendangerthe healthof
thosewhoarehypersensitivetochemicals.
Donotplaceapplianceswhichproduceopenfireinplaces
exposedtotheairflowfromtheunit orundertheindoorunit.
Itmaycauseincompletecombustonordeformationofthe
unitduetotheheat.
Donotinstalltheairconditioneratanyplacewhere
flammablegasmayleakout.
Ifthegasleaks outandstays aroundtheairconditioner,a
firemaybreakout.
Theapplianceisnotintendedforusebyyoungchildrenor
infirmpersonswithoutsupervision.
Youngchildren shouldbesupervisedtoensurethattheydo
notplaywiththeappliance.
Fig.2-1 Liftingoftheunit
Handling oftheunit
Theangleofinclinationshouldnot bemorethan15ºwhencarryingtheunit,toavoidoverturnof theunit.
a. Rollinghandling:severalrollingrodsofthesamesizeareplacedunderthebaseof the unit, andthelengthofeachrodmust bemore
thantheouterframeof thebaseandsuitableforbalancingoftheunit.
b. Lifting:thestrengthliftingrope (belt)canbearshouldbe 4timestheweightoftheunit. Checktheliftinghookandensurethat it isfirmly
attachedtothe unit, andtheliftingangleshouldbemorethan60º. Toavoiddamagestotheunit, thecontactpositionof theunitandlifting
ropeshouldbeprovidedwithanatleast 50mmthick woodblock, clothorhardpaper.Anypersonisnot allowedtostandbelowtheunit
whenliftingit.
Liftingangle
Thepositionshouldbeprovidedwithanat
least 50mm thick woodblock,clothorhard
paper,toavoiddamagestotheunit.
Installation & owner's manual
2
Modular Chiller MUEN-H6

3.INSTALLATIONOFTHEUNIT
3.1Selection ofinstallationsites
3.1.1Theunitcanbeinstalledonthegroundoronthe
suitableroof,butenoughventilationvolumeshouldbe
ensuredinbothcases.
3.1.2Theunitshouldnotbeinstalledwherenoiseand
vibrationarerequiredtoacertainextent.
3.1.3Theinstalledunitshouldbeshelteredfromdirect
sunlightasmuchaspossible,andbefarawayfrom
boilerfluesandambientairwhichmayerodecondenser
coilsand coppertubepartsoftheunit.
3.1.4Iftheinstalledunitcan be approached by
unauthorizedpersons,safetymeasuresofisolation
shouldbetaken,suchasrailguards.Thesemeasures
willavoidartificialdamagesandaccidentaldamages,
andprevent thecontrolboxesfrombeingopenedleading
toexposureof electriccomponentsinoperation.
3.1.5Theheightoftheinstallationfoundationfortheunit
shouldnotbeless than300mm,andfloordrainsare
requiredininstallationsites,toensuresmoothdrainage
andremoveanyseeper.
3.1.6Incaseofinstallationontheground, thesteelbase
oftheunitshouldbelocatedontheconcretefoundation,
andtheconcreteplinthshouldextendbelowfrozensoil
layer.Thefoundationoftheunitshouldnot beconnected
tothefoundationofthebuilding,toavoidaffectingthe
peopleduetotransferofnoiseandvibration.Thebase
oftheunitisprovidedwithinstallationholes,whichcan
beusedtoconnecttheunit andthefoundationfirmly.
3.1.7Incaseofinstallationontheroof,theroofmust
possessenoughstrengthtosustainweightoftheunit
andmaintenancepersonnel.Theunitcanbesupported
onconcretefoundationsorchannelsteelframessimilar
tothoseused intheunitinstallationontheground.The
load-bearingchannelsteelmustbeinalignment withthe
installationholesoftheunitdamper,andthechannel
steelshould possessenough widthforinstalling the
damper.
3.1.8Consultthebuildingcontractor,thearchitectural
designerorotherspecialistsaboutthecaseswithspecial
installationrequirements.
Theselectedinstallationsiteof theunitshouldfacilitateconnection
ofwaterpipesandwires,andbefreefromwaterinletofoilfume,
steamorotherheatsources.Besides,the noiseof theunitandcold
andhotairshouldnotinfluencethesurroundingenvironment.
Fig.3-1
Table
3.1
Afterinstallingthespringdamper,thetotalheightoftheunit
willincreaseby135mmorso.
Theportsofinletandoutletpipesshouldbeflange ports,and
flangesshouldbehubbedslip-on-weldingsteelpipeflanges.
NOTE NOTE
Installation & owner's manual
3
Modular Chiller MUEN-H6
Front view
E F
D
Left view
C
Top view
A
3.2Outlinedimensional drawing (unit:mm)
A B C D E F
1514 841 1865 100 317 874
Model
G
200
MUEN-30-H6T

3.3Requirementsofarrangementspace oftheunit
3.3.1Requirementsof arrangement spaceoftheunit
3.3.1.1Toensureadequateairflowenteringthecondenser,
theinfluenceofdescendingairflowcausedbythe high-rise
buildingsaroundupontheunitshouldbe takenintoaccount
wheninstallingtheunit.
3.3.1.2If theunitisinstalledwheretheflowingspeedofairis
high,suchasontheexposedroof, themeasuresincluding
sunkfenceand Persianblindscanbetaken,topreventthe
turbulentflowfromdisturbing theairenteringtheunit. Ifthe
unitneedstobeprovidedwithsunkfence,theheightofthe
lattershouldnotbemorethanthatoftheformer;ifPersian
blindsarerequired,thetotal lossofstaticpressureshouldbe
less than the staticpressureoutsidethefan.The space
betweentheunitandsunkfenceorPersianblindsshouldalso
meetthe requirement oftheminimuminstallationspaceofthe
unit.
3.3.1.3Iftheunitneedstooperateinwinter,and the
installationsitemaybe coveredbysnow,theunitshouldbe
locatedhigherthanthesnowsurface,toensurethatairflows
throughthecoilssmoothly.
Fig.3-2
Input of airflow
Input of airflow
Input of airflowInput of airflow
3.4Space requirementsforparallelinstallation of
multiplemodularunits
Toavoidbackflowoftheairin thecondenserandoperational
faultsoftheunit,theparallelinstallationofmultiplemodular
unitscan followthedirectionAandDasshowninFig.3-2, the
spacesbetweentheunitandtheobstaclearegiveninTable
3.1,andthespacebetweenadjacentmodularunitsshouldnot
be less than 300mm;theinstallation can alsofollowthe
directionBandCasshowninFig.3-2,thespacesbetweenthe
unitandtheobstaclearegiveninTable3-1,andthespace
between adjacentmodularunitsshouldnotbeless than
600mm;the installation canalsofollowthe direction
combinationofAandD, andBandC,thespacesbetween the
unitand the obstaclearegiven inTable 3-1,the space
betweenadjacentmodularunitsinthedirection AandDshould
notbelessthan300mm,andthe spacebetweenadjacent
modularunitsinthedirectionBandCshouldnotbelessthan
600mm.If thespacesmentionedabovecannotbemet, theair
passingfromtheunittothecoilsmaybe restricted,orback
flowofairdischarge mayoccur,andtheperformanceofthe
unitmaybeaffected,ortheunit mayfailtooperate.
3.5Installation foundation
a.Theunitshouldbelocated onthehorizontalfoundation,the
groundfloorortheroofwhichcanbearoperatingweightof the
unitandtheweightofmaintenancepersonnel.RefertoTable
9.1(Table ofapplicablemodelsandparameters)foroperating
weight.
b.If theunitislocatedsohigh thatitisinconvenientfor
maintenancepersonneltoconductmaintenance,thesuitable
scaffoldcanbeprovidedaroundtheunit.
c.Thescaffoldmustbeabletobeartheweightofmaintenance
personnelandmaintenancefacilities.
d.Thebottomframeoftheunitisnotallowed tobeembedded
intotheconcreteofinstallationfoundation.
3.5.1Locationdrawingofinstallationfoundationoftheunit: (unit:
mm)
Schematicdiagramofinstallationdimensionoftheunit
ConcreteCement mortarDrainage channel
Table3-2
Fig.3-3
Fig.3-4
A D
Installation & owner's manual
4
Modular Chiller MUEN-H6
Installation space (mm)
A
B
C
D
E
≥1200
≥1200
≥1200
≥1200
≥2000
Drainage channel
Anchor bolt

3.6Installation ofdampingdevices
3.6.1Damping devices mustbeprovidedbetweentheunit
and itsfoundation.
Bymeansofthe Φ15mm diameterinstallationholesonthe
steelframeoftheunitbase,theunitcan befastenedon
the foundationthrough the springdamper.See
Fig.3-3(Schematicdiagramofinstallationdimensionofthe
unit)fordetailsaboutcenterdistanceoftheinstallation
holes.The damperdoesnotgowiththeunit,andtheuser
can selectthedamperaccording totherelevant
requirements.Whentheunit isinstalledonthehigh roofor
theareasensitivetovibration,pleaseconsulttherelevant
personsbeforeselectingthedamper.
3.6.2Installation stepsofthedamper
Step 1.Makesurethatthe flatness oftheconcrete
foundationiswithin ±3mm,andthenplacetheunitonthe
cushionblock.
Step 2. Raisethe unittotheheightsuitableforinstallation
of thedampingdevice.
c. Removetheclampnutsofthedamper.
Step 3.Placetheunitonthedamper,andalignthefixing
boltholesofthedamperwiththefixingholeson the unit
base.
Step 4.Returntheclampnutsofthedampertothefixing
holesontheunitbase,andtightenthemintothe damper.
Step 5.Adjusttheoperationalheightofthedamperbase,
andscrewdownthelevelingbolts.Tightentheboltsby
onecircletoensureequal heightadjustmentvarianceof
thedamper.
Step 6.The lockboltscanbetightenedafterthecorrect
operationalheight isreached.
Dampingdevice
Nut
Ferrol
Itisrecommendedthat thedampershouldbefastenedon
thefoundationwiththeprovidedholes.Aftertheunitis
placedonthefoundation, thedamperconnectedwiththe
unitshouldnot bemoved,andthecentral clampnutisnot
allowedtobetightenedbeforethedampersustainsload.
Fig.3-5
4.WATER SYSTEMINSTALLATION
4.1Basicrequirementsofconnection ofchilled
waterpipes
●Aftertheunitisinplace, chilledwaterpipescan belaid.
●Therelevantinstallationregulationsshould beabidedwith
whenconductingconnectionofwaterpipes.
●Thepipelinesshouldbefree ofanyimpurity,andallchilled
waterpipesmustconformtolocalrulesand regulationsof
pipelineengineering.
●Connectionrequirementsof chilledwaterpipes
a.Allchilledwaterpipelinesshouldbethoroughlyflushed,tobe
freeofanyimpurity,beforetheunitisoperated.Anyimpurity
shouldnot beflushedtoorintotheheatexchanger.
b.Watermustentertheheatexchangerthroughthe inlet;
otherwisetheperformanceoftheunit willdecline.
c.The inletpipeoftheevaporatormustbeprovidedwitha
targetflowcontroller,torealizeflow-breakprotectionforthe
unit.Bothendsofthetargetflowcontrollermustbesupplied
withhorizontalstraightpipesectionswhosediameteris5times
that of theinletpipe. Thetargetflowcontrollermustbeinstalled
instrictaccordancewith “Installation&RegulationGuidefor
TargetFlowController”(Figure4.3~4.4).Thewiresofthetarget
flowcontrollershouldbeledtotheelectriccabinetthrough
shieldedcable(seeElectricControllingSchematicDiagramfor
details).Theworking pressureofthetargetflowcontrolleris
1.0MPa,and itsinterfaceis1inchindiameter.Afterthe
pipelinesareinstalled,the targetflowcontrollerwillbe set
properlyaccordingtotheratedwaterflowoftheunit.
d.Thepumpinstalledinthewaterpipelinesystemshould be
equippedwithstarter.Thepumpwill directlypress waterinto
theheatexchangerofthewatersystem.
e.Thepipesandtheirportsmustbeindependentlysupported
butshouldnotbesupportedon theunit.
f.Thepipesandtheirportsoftheheatexchangershouldbe
easytodisassemble foroperationand cleaning,aswellas
inspectionof port pipesof theevaporator.
g.Theevaporatorshouldbeprovidedwithafilterwithmore
than40meshesperinchatsite.Thefiltershouldbeinstalled
neartotheinletportasmuchaspossible,andbeunderheat
preservation.
h.The by-pass pipesandby-passvalvesasshowninFig.4-1
mustbemountedfortheheatexchanger,tofacilitatecleaning
oftheoutsidesystemofwaterpassagebeforethe unitis
adjusted.Duringmaintenance,thewaterpassage oftheheat
exchangercan be cutoffwithoutdisturbing otherheat
exchangers.
i.Theflexibleportsshouldbeadoptedbetweentheinterfaceof
theheatexchangerandon-sitepipeline,toreducetransferof
vibrationtothebuilding.
j. Tofacilitatemaintenance,theinletand outletpipesshouldbe
providedwiththermometerormanometer.Theunitisnot
equippedwithpressureandtemperatureinstruments,sothey
needtobe purchasedbytheuser.
k.Alllowpositionsofthewatersystemshouldbeprovidedwith
drainageports,todrainwaterintheevaporatorandthe system
completely;andallhigh positionsshouldbesupplied with
discharge valves,tofacilitateexpellingairfromthepipeline. The
discharge valvesanddrainageportsshouldnotbeunderheat
preservationtofacilitatemaintenance.
CAUTION
NOTE
Installation & owner's manual
5
Modular Chiller MUEN-H6
Anchor bolt (M10X300)

l.Allpossiblewaterpipesinthesystemtobechilledshouldbe
underheatpreservation,includinginlet pipesand flangesofthe
heat exchanger.
m.Theoutdoorchilledwaterpipelinesshouldbewrappedwith
anauxiliaryheatingbeltforheatpreservation,andthematerial
oftheauxiliaryheatbeltshould be PE,EDPM,etc.,with
thicknessof20mm,topreventthepipelinesfromfreezingand
thuscrackingunderlowtemperature.Thepowersupplyofthe
heatingbeltshouldbeequipped withanindependent fuse.
n.Whentheambienttemperatureislowerthan2 C,andthe
unit willbenotusedforalongtime,waterinsidetheunitshould
bedrained.Iftheunitisnotdrainedinwinter,itspowersupply
shouldnotbecutoff, and the fancoilsinthewatersystemmust
beprovidedwiththree-wayvalves,toensuresmoothcirculation
of thewatersystemwhentheanti-freezingpumpisstartedupin
winter.
o.Thecommonoutletpipelinesofcombinedunitsshouldbe
providedwithmixingwatertemperaturesensor.
WARNING
●Forthewaterpipelinenetworkincludingfiltersandheat
exchangers,dreg ordirtmayseriouslydamagestheheat
exchangersandwaterpipes.
●Theinstallationpersonsorthe usersmustensurethe
qualityofchilledwater,andde-icingsaltmixturesandair
shouldbeexcludedfromthe watersystem,sincetheymay
oxidizeandcorrodesteelpartsinsidetheheat exchanger.
4.2Connectiondrawing ofpipelinesystem
Stop valve Pressuregauge Waterflowswitch Gatevalve Flexiblejoint
Y-shapedfilter ThermometerCirculatingpump Checkvalve Automaticdischargevalve
Symbol explanation
Fig.4-1
Incertainoccasion(especiallyinmanufacturecoolingprocess),
forconformingthesystemwatercontentrequirement,it’snecessary
tomountatankequippingwithacut-off baffleat thesystemtoavoid
watershort-circuit, Pleaseseethefollowingschemes:
kWistheunitforcoolingcapacityandListheunitforG
waterflowintheformulacountingtheminimumwaterflow.
Comfortabletypeairconditioner
G=coolingcapacity×2.6L
process typeaircooling
G=coolingcapacity×7.4L
4.3Design ofthetankinthesystem
Installation & owner's manual
6
Modular Chiller MUEN-H6
Main unit
Expansion tank
Water replenishing
Dirt discharge valve
Differential pressure by-pass valve
Two-way valve
Three-way valve
Terminal
Auxiliary electric heater

4.5Waterqualitycontrol
4.5.1Waterqualitycontrol
Whenindustrialwaterisusedaschilledwater,littlefurringmay
occur;however,wellwaterorriverwater,usedaschilledwater,
maycausemuchsediment,suchasfurring,sand,and soon.
Therefore,wellwaterorriverwatermustbefilteredandsoftened
insofteningwaterequipmentbeforeflowingintochilledwater
system. Ifsandandclaysettleintheevaporator, circulationof
chilledwatermaybeblocked,andthusleading tofreezing
accidents;ifhardnessofchilledwateristoohigh,furringmay
occureasily,andthedevicesmaybecorroded.Therefore,the
qualityofchilledwatershouldbeanalyzedbeforebeingused,
suchasPHvalue,conductivity,concentrationofchlorideion,
concentrationof sulfideion,andsoon.
<50ppm
<50ppm
<30ppm
<200μV/cm(25℃)
<0.3ppm
<50ppm
<50ppm
4.5.2Applicablestandardofwaterqualityfortheunit
PHvalue
Totalhardness
Conductivity
Sulfideion
Chlorideion
Ammoniaion
Sulfateion
Silicon
Ironcontent
Sodiumion
Calciumion
No
No
Norequirement
Table4-1
7～8.5
4.6Installation &regulationguidefortargetflow
controller
Pleasecarefullycheck flowswitchesbeforeconducting
installationofthetargetflowcontroller.Packingshouldbein
good condition,and theappearanceshouldbe free of
damageanddeformation.If anyproblem,pleasecontactthe
manufacturer.
Flowswitchescanbeinstalledinthehorizontalpipelineor
theverticalpipeline withupwardflowingdirectionbutcannot
bemountedinthepipelinewithdownwardflowingdirection.
Theinlet waterofgravityshouldbetaken intoaccountwhen
flowswitchesareinstalledin thepipelinewithupwardflowing
direction.
Targetflowcontrollermustbeinstalledon asectionof
straight-linepipeline,anditsbothendsmustbesupplied with
straight-linepipeswhoselengthisatleast5timesdiameter
of thepipe.Inthemeanwhile,thefluidflowingdirectioninthe
pipelinemustbeconsistentwiththedirectionofarrowonthe
controller.Theconnectionterminalshouldbelocated where
wiringconnectioncanbe easilydone.
Payattentiontothe followingitems when conducting
installationandwireconnection:
4.6.1
4.6.2
4.6.3
4.6.4
Error Recommendation
Fig.4-2
Recommendation
Error
Collisionofthewrenchwiththesoleplateoftheflowswitch
isprohibited,sincesuchcollisionmaycausedeformation
andfailureoftheflowswitch.
Toavoidelectricshock anddamagestothedevices,the
powersupplyshouldbecutoff, whenwiresareconnected
oradjustment isdone.
Whenwiringconnectionisconducted,adjustmentofother
screwsexceptconnectionterminalsofmicroswitchesand
groundscrewsisprohibited.Inthemeanwhile,overgreat
forceshouldnotappliedwhenwiresofmicroswitchesare
connected,otherwisemicroswitchesmaysuffer
displacement,thusleadingtofailureof flowswitches.
Specialgrounding screwsshould be used forearth
connection.Boltsshouldnotbeinstalledorremovedat
will;otherwiseflowswitchesmaysufferdeformationand
failure.
Flowswitcheshavebeensetat minimalflowvaluepriorto
ex-factory.Theyshould notbeadjusted belowthe
ex-factorysettingvalue,ortheymaysufferfailure.After
installingflowswitches,pleasepresstheflowswitchlever
severaltimestocheckthem.Whentheleverisfoundnot
torespondwith “clatter”,rotatethescrewinaclockwise
direction, until “clatter”occurs.
a.
b.
c.
d.
e.
4.4Selectionandinstallationofthepump
4.4.1Select thepump
a. Selectthewater-flowofthepump
Theratedwater-flowmustnolessthantheunitratedwater-flow;
intermsofmulti-connecttheunits,thatwater-flowmustnoless
thantotalunits’ratedwater-flow.
b. Selecttheleft of thepump.
H=h1+h2+h3+h4
H:Theliftofthepump.
h1:Mainunit waterresistance.
h2:Pumpwaterresistance.
h3:Waterresistanceofthelongestwater-loop distance, includes:
pipe resistance,differentvalve’sresistance,flexiblepipe
resistance,pipe elbowand three-wayresistance,two-way
resistanceorthree-wayresistance, aswellasfilterresistance.
H4: thelongest terminalresistance.
4.4.2Installationthepump
a.Thepumpshouldbe installedatthewaterinletpipe,bothof
whichsidesmustmountthesoft connectorsforvibration-proof.
b. Thebackuppumpforthesystem(recommended).
c.Unitsmustwithamainunitcontrols(Pleasesee Fig.5-3forthe
controlswiringdiagram).
Installation & owner's manual
7
Modular Chiller MUEN-H6