EngA AF Series Manuale utente
IOM-52 Apr 13 R2
INSTALLATION, OPERATION
AND MAINTENANCE MANUAL
FOR
AF / DCU SERIES
AIR COOLED CONDENSERS and FLUID COOLERS
UNIT MODEL NO. _________________
UNIT SERIAL NO. _________________
SERVICED BY: ___________________
TEL. NO: ________________________
CANADIAN
HEAD OFFICE
AND FACTORY
USA
HEAD OFFICE
AND FACTORY
CANADIAN
EASTERN FACTORY
1401 HASTINGS CRES. SE
CALGARY, ALBERTA
T2G 4C8
Ph: (403) 287-4774
Fx: 888-364-2727
32050 W. 83rd STREET
DESOTO, KANSAS
66018
Ph: (913) 583-3181
Fx: (913) 583-1406
1175 TWINNEY DRIVE
NEWMARKET, ONTARIO
L3Y 5V7
Ph: (905) 898-1114
Fx: (905) 898-7244
SALES OFFICES ACROSS CANADA AND USA
Retain instructions with unit and maintain in a legible condition.
Please give model number and serial number when contacting
factory for information and/or parts.
www.engineeredair.com
AAF / DCU MANUAL
IOM-52 2 of 23 Apr 13 R2
TABLEOFCONTENTS
Safetyprecautions.............................................................................................................................................................................3
Youhaveresponsibilitiestoo.............................................................................................................................................................3
Introduction.......................................................................................................................................................................................3
Warranty............................................................................................................................................................................................4
Parts...................................................................................................................................................................................................5
Receiving............................................................................................................................................................................................5
Temporarystorage.............................................................................................................................................................................5
Installation..........................................................................................................................................................................................6
Codes..................................................................................................................................................................................................6
Clearanceforairflow.........................................................................................................................................................................7
Qualifiedinstaller...............................................................................................................................................................................7
Refrigerationpipingrecommendations.............................................................................................................................................7
Undergroundrefrigerantpiping...............................................................................................................................................7
Pipingconnectionsizes.............................................................................................................................................................8
Traps.........................................................................................................................................................................................8
Liquidline.................................................................................................................................................................................8
Dischargeline...........................................................................................................................................................................8
Refrigerationspecialties(byothers).........................................................................................................................................9
Servicevalves(recommended).................................................................................................................................................9
Sightglass/moistureindicator(required).................................................................................................................................9
Liquidlinefilter‐drier(required)...............................................................................................................................................9
Liquidlinesolenoidvalve(required)......................................................................................................................................10
Thermostaticexpansionvalve(required)...............................................................................................................................10
Dischargecheckvalves...........................................................................................................................................................10
Refrigerationtable1equivalentlength..................................................................................................................................10
Refrigerationtable2(R410A)pipingguidelinesfornormalairconditioningduty................................................................11
Refrigerationtable2(R407C)pipingguidelinesfornormalairconditioningduty.................................................................12
Refrigerationtable2(R134a)pipingguidelinesfornormalairconditioningduty.................................................................13
Refrigerationtable3...............................................................................................................................................................14
Refrigerationtable4...............................................................................................................................................................14
Refrigerationpipingmaterialsandprocedures...............................................................................................................................15
Tubing.....................................................................................................................................................................................15
Leakchecking..........................................................................................................................................................................16
Evacuationanddehydration...................................................................................................................................................16
Refrigerantcharging.........................................................................................................................................................................17
Flushinganddegreasingofwaterandglycolcoils...........................................................................................................................18
Heattransferfluids.................................................................................................................................................................18
Shutdownprocedure.......................................................................................................................................................................18
Maintenance....................................................................................................................................................................................19
Heresite®maintenance.....................................................................................................................................................................19
Electrical...........................................................................................................................................................................................20
Beltadjustment................................................................................................................................................................................20
Setscrews.........................................................................................................................................................................................20
Motorlubrication.............................................................................................................................................................................21
Dampers...........................................................................................................................................................................................21
Controls............................................................................................................................................................................................21
Refrigeration....................................................................................................................................................................................22
Seasonalmaintenance............................................................................................................................................................22
Condenserfancontroltypicalsettings.......................................................................................Error!Bookmarknotdefined.
Troubleshootingchart.....................................................................................................................................................................22
©AirtexManufacturingPartnership.Allrightsreserved.
AAF / DCU MANUAL
IOM-52 3 of 23 Apr 13 R2
SAFETYPRECAUTIONS
Read,understandandfollowthecompletemanualbeforebeginningtheinstallation,includingallsafety
precautionsandwarnings.
Warning:
Improperinstallation,adjustment,alteration,serviceormaintenancecancause
propertydamage,injuryordeath.Readtheinstallation,operatingandmaintenance
instructionsthoroughlybeforeinstallingorservicingthisequipment.
Warning:Thisunitisconnectedtohighvoltages.Electricalshockordeathcouldoccurif
instructionsarenotfollowed.Thisequipmentcontainsmovingpartsthatcanstart
unexpectedly.Injuryordeathcouldoccurifinstructionsarenotfollowed.Allwork
shouldbeperformedbyaqualifiedtechnician.Alwaysdisconnectandlockoutpower
beforeservicing.DONOTbypassanyinterlockorsafetyswitchesunderany
circumstances.
YOUHAVERESPONSIBILITIESTOO
Thisinstallation,operationandmaintenancemanualcannotcovereverypossibility,situationor
eventuality.Regularservice,cleaningandmaintainingtheequipmentisnecessary.Ifyouarenotcapable
ofperformingthesetasks,hireaqualifiedservicespecialist.Failuretoperformthesedutiescancause
propertydamageand/orharmtothebuildingoccupantsandwillvoidthemanufacturers’warranty.
INTRODUCTION
EngineeredAirunitsarehighqualityproductsdesignedandmanufacturedtoprovidemanyyearsof
trouble‐freeoperation.Werecommendthatthismanualbereadthoroughlytoensureproperinstallation,
efficientoperationandpropermaintenanceofthisequipment.Thesubmittalrecordisconsideredtobe
partoftheInstallation,OperationandMaintenanceManual.Pleasereportanyomissionstothenational
servicemanager.
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IOM-52 4 of 23 Apr 13 R2
WARRANTY
LIMITEDWARRANTYENGINEEREDAIRwillfurnishwithoutcharge,F.O.B.factory,freightcollect,
replacementpartsfor,orrepairstoproductscoveredhereinwhichprovedefectiveinmaterialor
workmanshipundernormalandproperuseforaperiodoftwelve(12)monthsfromtheinitialstart‐upor
eighteen(18)monthsfromthedateofshipment,whicheverexpiressooner,providedthecustomergives
ENGINEEREDAIRwrittennoticeofsuchdefectswithinsuchtimeperiodsandprovidedthatinspectionby
ENGINEEREDAIRestablishesthevalidityoftheclaimandallpertinentinvoiceshavebeenpaidinfull.The
repairsorreplacementswillbemadeonlywhenthecompleteproduct(s)orpart(s)claimedtobedefective
arereturnedtoENGINEEREDAIRoradepotdesignatedbyENGINEEREDAIR,transportationcharges
prepaid.Repairsorreplacementsasprovidedforbythisparagraphshallconstitutefulfillmentofall
ENGINEEREDAIR'sobligationswithrespecttothiswarranty.Therefrigerantchargeisnotincludedinany
partofthiswarranty.Thiswarrantydoesnotapplytoanyproductsorpartsthereofthathavebeensubject
toaccident,misuseorunauthorizedalterations,orwhereENGINEEREDAIR'sinstallationandservice
requirementshavenotbeenmet.
Theforegoingwarrantyisinlieuofallotherwarranties,expressorimplied.ENGINEEREDAIRspecifically
disclaimsanyimpliedwarrantyofmerchantabilityand/orfitnessforpurpose.Undernocircumstances
shallENGINEEREDAIRbeliableto,norberequiredtoindemnify,Buyeroranythirdpartiesforanyclaims,
losses,labor,expensesordamages(includingspecial,indirect,incidental,orconsequentialdamages)of
anykind,resultingfromtheperformance(orlackthereof)ofthisAgreementortheuseof,orinabilityto
usethegoodssoldhereunder,including,butnotlimitedto,damagesfordelay,temporaryheating/cooling
costs,lossofgoodwill,lossofprofitsorlossofuse.Furthermore,thepartiesagreethattheBuyer'ssole
remedyunderthisagreementshallbelimitedtothelimitedwarrantysetforthintheprecedingparagraph
relatingtotherepairorreplacementofanydefectivegoods.Undernocircumstancesshallanyclaimor
awardagainstENGINEEREDAIRexceedtheoriginalcontractpricewhetherawardedthrougharbitration,
litigationorotherwise.
ENGINEEREDAIRWarrantyisvoidif:
1. Theunitisnotinstalledinaccordancewiththismanual.
2. Thestart‐upandoperationoftheunitisnotperformedinaccordancewiththismanual.
3. Theunitisoperatedinanatmospherecontainingcorrosivesubstances.
4. Theunitisallowedtooperateduringbuildingconstruction.
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PARTS
Warning:
Anyreplacementpartmustbeofequivalentlistingorcertificationandbefunctionally
equivalent.Thereplacementpartmustmeettheoriginal’sspecificationintermsof
functionalityincludingcertifications,timing,inputandoutputrange,accuracyand
operation.
Failuretoreplacepartsorcomponentswithequivalentpartscancauseproperty
damage,injuryordeath.
1. Motors:
Motormanufacturershaveservicecentersthatwillrepairorreplacemotorsasrequired.
2. PartsOtherThanMotors:
ContactthenearestEngineeredAirsalesofficeorfactory.BesuretoincludeModelNumber,Serial
Number,dateofinstallationandnatureoffailurealongwiththedescriptionofthepartsrequired.
Somepartsmaynotbestockeditemsthatmustbemadeorordered.
RECEIVING
Refertothebackofthepackingslipforreceivingunitinstructions.
Onreceiptoftheunit,checkfordamage.Inspectprotectivecoversforpuncturesorothersignsthatthere
maybeinternaldamage.Removeprotectivecoversandcheckforinternaldamage.Replacecoversifthe
unitisnotbeingassembledorinstalledatthistime.Openaccessdoorsandcheckforinternaldamage.
Closeaccessdoorswhentheinspectioniscomplete.Ifdamageisfoundfollowtheinstructionsonthe
packingslip.
Onreceiptoftheunit,checkelectricalcharacteristics(seeratingplate)tomakesuretheunitvoltageis
compatiblewiththatavailablefortheunit.Allpartsforfieldinstallationarelistedontheshippingorder
form.
TEMPORARYSTORAGE
Ifaunitistobestoredpriortoinstallationthefollowingprecautionsarerequired:
• Storeinawelldrainedareathatwillnotaccumulatesurfacewater.
• Storeinanareawheretheunitwillnotgetdamaged.
• Theentireperimeterandanyfullheightcrossmembersoftheunitmustbesupportedbyalevel
surfaceandthesupportingsurfacemustbeadequateforsupportingtheentireweightoftheunit.
• Allprotectivecoveringsthatwereprovidedforshippingmustbeinplace.
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INSTALLATION
Warning: Thisunitisnotratedforhazardouslocationsandcannotbeinstalledinareasrequiring
anyhazardouslocationrating.
Caution: Allwiringandpipinginstallationmustbecompletedbyqualifiedpersonsin
accordancewithallfederal,state,provincialand/orlocalcodes.
Note: Installationshallbeinaccordancewiththismanualandallotherassociated
componentandcontrolInstallation,OperationandMaintenanceManuals.
CODES
InCanada:
1. TheinstallationofthisunitshallbeinaccordancewiththelatesteditionoftheCanadianElectrical
Code,Part1–C.S.A.StandardC22.1,ProvincialandLocalCodes,andinaccordancewiththelocal
authoritieshavingjurisdiction.
2. ThisunitshallbeelectricallygroundedinaccordancewiththelatesteditionoftheCanadianElectrical
Code,Part1–C.S.A.StandardC22.1,ProvincialandLocalCodes,andinaccordancewiththelocal
authoritieshavingjurisdiction.
3. TheinstallationofthisunitshallbeinaccordancewiththelatesteditionoftheCanadianNaturalGas
andPropaneInstallationCode,C.S.A.StandardB149.1,ProvincialandLocalCodes,andinaccordance
withthelocalauthoritieshavingjurisdiction.
4. TheinstallationofthisunitshallbeinaccordancewiththelatesteditionoftheNationalPlumbingCode
ofCanada,ProvincialandLocalCodes,andinaccordancewiththelocalauthoritieshavingjurisdiction.
5. TheinstallationofthisunitshallbeinaccordancewithallotherNational,ProvincialandLocalCodes,
andinaccordancewiththelocalauthoritieshavingjurisdiction.
InUSA:
1. TheinstallationofthisunitshallbeinaccordancewiththelatesteditionoftheNationalElectrical
Code(ANSI/NFPA70),StateandLocalCodesandinaccordancewiththelocalauthoritieshaving
jurisdiction.
2. ThisunitshallbeelectricallygroundedinaccordancewiththelatesteditionoftheNational
ElectricalCode(ANSI/NFPA70),StateandLocalCodesandinaccordancewiththelocalauthorities
havingjurisdiction.
3. Iftheunithasnotbeenprovidedwithanelectricdisconnectswitch,oneofadequateampacity
shallbeinstalledinaccordancewithArticle430oftheNationalElectricalCode(ANSI/NFPA70).
4. TheinstallationofthisunitshallbeinaccordancewiththelatesteditionoftheNationalFuelGas
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CodeANSI/Z223.1/NFPA54,StateandLocalCodesandinaccordancewiththelocalauthorities
havingjurisdiction.
5. TheinstallationofthisunitshallbeinaccordancewiththelatesteditionoftheNationalStandard
PlumbingCode(NSPC),StateandLocalCodesandinaccordancewiththelocalauthoritieshaving
jurisdiction.
6. TheinstallationofthisunitshallbeinaccordancewithallotherNational,StateandLocalCodes,
andinaccordancewiththelocalauthoritieshavingjurisdiction.
CLEARANCEFORAIRFLOW
Properairflowisessentialfortheoperationofthisequipment.Maintainatleast60”(1500mm)clearance
betweenthecoilandanyobstruction.Maintainatleast96”(2400mm)betweenadjacentsections.Donot
placeinawell.Wellscreateasituationwhereairre‐circulatesfromthefanbacktothecoil.Enclosures
mustbedesignedforproperairflowandtopreventblockageorre‐circulatedair.
QUALIFIEDINSTALLER
Tocompletetheinstallation,arefrigerationcontractorexperiencedandqualifiedinsystempipingis
required.Thecontractorisresponsibleforthedesign,selectionandinstallationoftherefrigeration
specialtiesandrefrigerantpipingforthisequipment.Thefollowinginformationisintendedtoprovide
generalinformationandguidelinesforthesuccessfulinstallationofthisequipment.
FordetailedinformationaboutinstallationpracticesconsultASHRAEhandbooks,ANSI/ASMECodes,
ANSI/ASHRAESafetyCodeforMechanicalRefrigeration,CAN/CSAB52MechanicalRefrigerationCodeand
anylocalauthoritieshavingjurisdiction.
Note:
Componentselection,pipingdesignandinstallationoftheairconditioningsystemarethe
responsibilityoftheinstallingcontractor.Thismanualisdesignedtoprovidegeneral
guidelinesandrecommendationsonly.Itisnotintendedtobeacompletemanualforair
conditioningdesign.
REFRIGERATIONPIPINGRECOMMENDATIONS
UNDERGROUNDREFRIGERANTPIPING
Caution:
Undergroundcondenserrefrigerantpipingisnotrecommended.
Improperinstallationofacondensingunitwithundergroundpipingwillresultin
equipmentfailure.
ConsultFactoryonallsystemswithundergroundrefrigerantpiping.
Undergroundpipingwillvoidcompressorwarrantyunlessspecificallyauthorizedby
EngineeredAir.
Intheoffcycle,therefrigerantchargewillmigratetothecoldestlocation.Typically,groundtemperatures
arecoolerthanairtemperatures,andtheundergroundpipingbecomesthecoolestlocation.Inthiscase
therefrigerantchargewillmigratetoundergroundpiping.Whenthecompressorstarts,anyliquid
refrigerantinthedischargelinecouldcausenuisancetrippingonhighheadpressure.
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PIPINGCONNECTIONSIZES
Refrigerantpipingmustbeselectedtomeettheconditionsrequiredforyourspecificinstallation.The
tubingconnectionsizesontheequipmentmayormaynotbethecorrectsizeforyourspecificapplication.
Note:
DONOTselecttubingsizesbasedonthesizeoftheconnectionstubs.
Thecorrecttubingsizeforyourinstallationmustbecheckedandselectedforeachandevery
job.
TRAPS
Itisrecommendedthattrapsbeinstalledonallsuctionordischargegasrisers.
LIQUIDLINE
Selectthelinesizeusingpipingtables.
Liquidlinesshouldhaveamaximumrefrigerantvelocityof350feetperminute(1.78m/s)toavoidliquid
hammer.Selectpressuredropforatemperaturepenaltyoflessthan2°F(1°C).Ifaliquidlinetravels
throughawarmarea,suchasaboilerroom,insulatethelinetopreventheatgain.
Ensurethetemperaturepenaltydoesnotexceedthesubcoolingprovidedbythecondensingunit.
AsightglassshouldbeinstalledattheTXvalvetoensurethevalveisreceivingasolidcolumnofliquidif
adequatesubcoolingisaconcern.AnEngAIntercoolermaybeorderedandinstalledtohelpreducethe
effectsofinadequatesubcooling.
DISCHARGELINE
Dischargelinesmustbeselectedtobalancetworequirements;minimizepressuredropandensure
adequatelinevelocitytoallowforoilreturn.Horizontaldischargelinesshouldbeslopeddowninthe
directionofflow.Usesizingtablestoselecttubingsizesbasedoncapacity,equivalentlengthand
maximumsizeforoilreturn.
A
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Thesketchbelowdescribesaboveandbelowpipingconnectionsandtraprequirements.Onlyinstall
reducersontheverticalline,atleast12”(300mm)belowtheheaderconnection.
*12”(300mm)minimumheightbeforereducingsize.
REFRIGERATIONSPECIALTIES(BYOTHERS)
Note:
Refrigerantspecialtiesareselected,suppliedandinstalledbytheinstallingcontractor.
Mostofthesedeviceshavespecifieddirectionsofflowandmaybepermanentlydamagedif
notinstalledcorrectly.Alwaysfollowtheinstallationinstructionsprovidedwiththe
components.
SERVICEVALVES(Recommended)
Servicevalvesshouldbeinstalledtoallowservicingoftheequipment.Aliquidlineservicevalveatthe
condensingunitisconsideredaminimumrequirement.
SIGHTGLASS/MOISTUREINDICATOR(Required)
Sightglassesareinstalledintheliquidlinetogiveavisualindicationofthe
refrigerantcharge.Themoistureindicatorgivesanindicationofthemoisture
contentoftherefrigerant.
LIQUIDLINEFILTER‐DRIER(Required)
Thefilter‐drierisinstalledintheliquidlinetofilterparticulateandforeignmatter
fromtherefrigerant.Filter‐driersalsoabsorbsmallamountsofmoistureandacid.
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LIQUIDLINESOLENOIDVALVE(Required)
Theliquidlinesolenoidvalveisinstalledtocontrolliquidrefrigerantintheoff
cycle.ThesolenoidvalvemustbeinstalledclosetotheTXvalveattheevaporator
coil.Severaldifferentcontrolmethodsareusedtocontrolliquidlinesolenoid
valves.Seewiringdiagramandunitfunctionfordetails.
Note:
Liquidlinesolenoidvalvesmustbeinstalledattheevaporatorcoil,closetotheTXvalve.
THERMOSTATICEXPANSIONVALVE(Required)
Thethermostaticexpansionvalveissizedtomatchthecapacityofthesystem.The
TXvalveshouldbebalancedordualportedandmustbeexternallyequalized.One
valveisrequiredperdistributor.Theequalizationtubeconnectstothesuctionline
attheoutletoftheevaporatordownstreamofthebulb.TheTXvalvesensingbulb
isinstalledatthesamelocationtightlystrappedtothesuctionline.Suggested
positioningisatthesideofthepipe,atthe4:00o’clockor8:00o’clockposition.InsulatetheTXbulbafter
installation.
DISCHARGECHECKVALVES(Required)
Providedischargecheckvalve(s)totheinletoftheAF.Thiscontrolsliquidmigrationtothecompressorin
theoffcycle.
RefrigerationTable1EquivalentLength.
ACR(OD) Approximatepressurelossoffittings
(equivalentfeetoftubing)
Tubing
Size
90°
Std
90°
Long
Radius
90°
Street
45°
Std
Return
Bend
Tee
Branch
Flow
Tee
Straight
Through
Ball
Valve
Globe
Valve
Angle
Valve
1/2"OD 1.4 0.9 2.3 0.7 2.3 2.7 0.9 0.9 17 6
5/8”OD 1.6 1.0 2.5 0.8 2.5 3.0 1.0 1.0 18 7
7/8”OD 2.0 1.4 3.2 0.9 3.2 4.0 1.4 1.4 22 9
11/8”OD 2.6 1.7 4.1 1.3 4.1 5.0 1.7 1.7 29 12
13/8”OD 3.3 2.3 5.6 1.7 5.6 7.0 2.3 2.3 38 15
15/8”OD 4.0 2.6 6.3 2.1 6.3 8.0 2.6 2.6 43 18
21/8”OD 5.0 3.3 8.2 2.6 8.2 10.0 3.3 3.3 55 24
25/8”OD 6.0 4.1 10.0 3.2 10.0 12.0 4.1 4.1 69 29
Questo manuale è adatto per i seguenti modelli
1
Indice
