GUIDESPECIFICATIONS-50TCQ*07-14
Noteaboutthisspecification:
Carriercreatedthisspecificationin“Masterformat”aspublishedbytheConstructionSpecificationInstitute.Pleasefeel freetocopythisspecificationdirectlyintoyourbuildingspecifications.
RooftopPackagedHeatPump
HVACGuideSpecifications
SizeRange:6to12.5NominalTons
SectionDescription
230680SchedulesforDecentralized HVACEquipment
230680.13DecentralizedUnitaryHVACEquipmentSchedule
230680.13.A.Rooftopunitschedule
1.Scheduleispertheprojectspecificationrequirements.
230716HVACEquipmentInsulation
230716.13Decentralized,RooftopUnits:
230716.13.A.Evaporatorfancompartment:
1.Interiorcabinetsurfacesshallbeinsulatedwithaminimum1/2-in.thick,minimum11/2lbdensity,flexible fiberglassinsulationbondedwithaphenolicbinder,neoprenecoatedontheairside.
2.InsulationandadhesiveshallmeetNFPA90Arequirementsforflamespreadandsmokegeneration.
3.Unitinternalinsulationliningsaremanufacturedtomeetindustryrequirementsformicrobialresistanceasrequiredas partofUL-181andASTMC1071-12,havingbeenevaluatedinaccordancewiththe“MoldGrowthandHumidity” testinUL181,andtestsforfungiresistanceinASTMC1338andASTMG21.Airstreamsurfacesshallbeevaluated inaccordancewiththe“ErosionTest”inUL181,aspartofASTMC1071.
230716.13.B.Electricheatcompartment:
1.Aluminumfoil-facedfiberglassinsulationshallbeused.
2.InsulationandadhesiveshallmeetNFPA90Arequirementsforflamespreadandsmokegeneration.
230913InstrumentationandControlDevicesforHVAC
230913.23SensorsandTransmitters
230913.23.A.Thermostats
1.Thermostatmust:
a.havecapabilitytoenergize2differentstagesofcooling,and2differentstagesofheating.
b.includecapabilityforoccupancyscheduling.
230923Direct-digitalControlsystemforHVAC
230923.13Decentralized,RooftopUnits:
230923.13.A.PremierLink™controller
1.ShallbeASHRAE62compliant.
2.Shallaccept18-32VACinputpower.
3.Shallhaveanoperatingtemperaturerangefrom-40°F(-40°C)to158°F(70°C),10%-95%RH (non-condensing).
4.Shallincludeanintegratedeconomizercontrollertosupportaneconomizerwith4to20mAactuatorinputand nomicroprocessorcontroller.
5.Controllershallacceptthefollowinginputs:spacetemperature,setpointadjustment,outdoorairtemperature, indoorairquality,outdoorairquality,indoorrelativehumidity,compressorlock-out,fireshutdown,enthalpy,fan status,remotetimeclock/doorswitch.
6.ShallacceptaCO2sensorintheconditionedspace,andbedemandcontrolledventilation(DCV)ready.
7.Shallprovidethefollowingoutputs:Economizer,fan,coolingstage1,coolingstage2,heatstage1,heatstage2, heatstage3/exhaust/reversingvalve/dehumidify/occupied.
8.Unitshallprovidesurgeprotectionforthecontrollerthroughacircuitbreaker.
9.ShallbeInternetcapable,andcommunicateataBaudrateof38.4Korfaster.
10.ShallhaveanLEDdisplayindependentlyshowingthestatusofactivityonthecommunicationbus,andprocessor operation.
11.ShallincludeanEIA-485protocolcommunicationport,anaccessportforconnectionofeitheracomputerora Carriertechniciantool,anEIA-485portfornetworkcommunicationtointelligentspacesensorsanddisplays, andaporttoconnectanoptionalLonWorks*plug-incommunicationscard.
12.Shallhavebuilt-inCarrierComfortNetwork®(CCN)protocol,andbecompatiblewithotherCCNdevices, includingComfortLinkandComfortVIEW™controllers.
13.Shallhavebuilt-insupportforCarriertechniciantool.
14.Softwareupgradeswillbeaccomplishedbylocaldownload.Softwareupgradesthroughchipreplacementsare notallowed.
15.Shallbeshockresistantinallplanesto5Gpeak,11msduringoperation,and100Gpeak,11msduringstorage.
16.Shallbevibrationresistantinallplanesto1.5G@20-300Hz.
17.Shallsupportabuslengthof4000ftmax(1219m),60devicesper1000ft(305m)section,and1RS-485 repeaterper1000ftsections.
230923.13.B.RTUOpenMulti-protocol,directdigitalcontroller:
1.ShallbeASHRAE62compliant.
2.Shallaccept18-30VAC,50-60Hz,andconsumer15VAorlesspower.
3.Shallhaveanoperatingtemperaturerangefrom-40°F(-40°C)to130°F(54°C),10%-90%RH (non-condensing).
4.Shallincludebuilt-inprotocolforBACnet†(MS/TPandPTPmodes),Modbus**(RTUandASCII),JohnsonN2 andLonWorks.LonWorksEchelonprocessorrequiredforallLonapplicationsshallbecontainedinseparate communicationboard.
5.Shallallowaccessofupto62networkvariables(SNVT).Shallbecompatiblewithallopencontrollers.
6.BaudrateControllershallbeselectableusingadipswitch.
7.ShallhaveanLEDdisplayindependentlyshowingthestatusofserialcommunication,running,errors,power,all digitaloutputs,andallanaloginputs.
8.Shallacceptthefollowinginputs:spacetemperature,setpointadjustment,outdoorairtemperature,indoorair quality,outdoorairquality,compressorlock-out,fireshutdown,enthalpyswitch,andfanstatus/filterstatus/ humidity/remoteoccupancy.
9.Shallprovidethefollowingoutputs:economizer,fan,coolingstage1,coolingstage2,heatstage1,heatstage2, heatstage3/exhaust/reversingvalve.
10.Shallhavebuilt-insurgeprotectioncircuitrythroughsolidstatepolyswitches.Polyswitchesshallbeusedon incomingpowerandnetworkconnections.Polyswitcheswillreturntonormalwhenthe“trip”conditionclears.
11.Shallhaveabatteryback-upcapableofaminimumof10,000hoursofdataandtimeclockretentionduring poweroutages.
12.Shallhavebuilt-insupportforCarriertechniciantool.
13.ShallincludeanEIA-485protocolcommunicationport,anaccessportforconnectionofeitheracomputerora Carriertechniciantool,anEIA-485portfornetworkcommunicationtointelligentspacesensorsanddisplays, andaporttoconnectanoptionalLonWorkscommunicationscard.
14.Softwareupgradeswillbeaccomplishedbyeitherlocalorremotedownload.Nosoftwareupgradesthroughchip replacementsareallowed.
230933ElectricandElectronicControlSystemforHVAC
230933.13Decentralized,RooftopUnits:
230933.13.A.General:
1.Shallbecompletewithself-containedlowvoltagecontrolcircuitprotectedbyaresettablecircuitbreakeronthe 24-vtransformerside.Transformershallhave75VAcapability.
2.Shallutilizecolor-codedwiring.
3.Shallincludeacentralcontrolterminalboardtoconvenientlyandsafelyprovideconnectionpointsforvital controlfunctionssuchas:smokedetectors,phasemonitor,economizer,thermostat,DDCcontroloptions,lossof charge,freezeswitch,highpressureswitches.
4.Unitshallincludeaminimumofone8-pinscrewterminalconnectionboardforconnectionofcontrolwiring.
5.Shallincludeintegrateddefrostsystemtopreventexcessivefrostaccumulationduringheatingduty,andshallbe controlledasfollows:
a.Defrostshallbeinitiatedonthebasisoftimeandcoiltemperature.
b.A30,60,90,120minutetimershallactivatethedefrostcycleonlyifthecoiltemperatureislowenoughto indicateaheavyfrostcondition.
*LonWorksisa registered trademarkof EchelonCorporation.
†BACnetisaregisteredtrademarkofASHRAE(AmericanSocietyofHeating,RefrigeratingandAir---ConditioningEngineers).
**Modbusis aregisteredtrademarkofSchneiderElectric.
c.Defrostcycleshallterminatewhendefrostthermostatissatisfiedandshallhaveapositiveterminationtimeof 10minutes.
6.Defrostsystemshallalsoinclude:
a.DefrostCycleIndicatorLED.
b.Dipswitchselectabledefrosttimebetween30,60,90and120minutes.Factorysetat30minutes.
c.Moldedplugconnectiontoinsureproperconnection. 230933.23.B.Safeties:
1.Compressorovertemperature,overcurrent.
2.Lossofchargeswitch.
a.Unitswith2compressorsshallhavedifferentsizedconnectorsforthecircuit1andcircuit2lowandhighpressure switches.Theyshallphysicallypreventthecross-wiringofthesafetyswitchesbetweencircuits1and2.
b.Lossofchargeswitchshallusedifferentcolorwirethanthehighpressureswitch.Thepurposeistoassist theinstallerandservicetechniciantocorrectlywireandortroubleshoottherooftopunit.
3.High-pressureswitch.
a.Unitswith2compressorsshallhavedifferentsizedconnectorsforthecircuit1andcircuit2lowandhighpres- sureswitches.Theyshallphysicallypreventthecross-wiringofthesafetyswitchesbetweencircuits1and2.
b.Highpressureswitchshallusedifferentcolorwirethanthelowpressureswitch.Thepurposeistoassistthe installerandservicetechniciantocorrectlywireand/ortroubleshoottherooftopunit.
4.Freezeprotectionthermostat,evaporatorcoil.
5.Automaticreset,motorthermaloverloadprotector.
230993SequenceofOperationsforHVACControls
230993.13Decentralized,RooftopUnits:
230993.13.AINSERTSEQUENCEOFOPERATION
234013PanelAirFilters
234013.13Decentralized,RooftopUnits:
234013.13.A.Standardfiltersection
1.Shallconsistoffactory-installed,lowvelocity,throwaway2-in.thickfiberglassfiltersofcommerciallyavailable sizes.
2.Unitshalluseonlyonefiltersize.Multiplesizesarenotacceptable.
3.Filtersshallbeaccessiblethroughanaccesspanelwith“no-tool”removalasdescribedintheunitcabinetsection ofthisspecification(238119.13.G).
238119Self-ContainedAirConditioners
238119.13Small-CapacitySelf-ContainedAirConditioners(50TCQ*07-14)
238119.13.A.General
1.Outdoor,rooftopmounted,electricallycontrolled,heatingandcoolingunitutilizinga(n)hermeticscrollcom- pressor(s)forcoolingdutyandheatpumpforheatingduty.
2.Factoryassembled,singlepieceheatingandcoolingrooftopunit.Containedwithintheunitenclosureshallbeall factorywiring,piping,controls,andspecialfeaturesrequiredpriortofieldstart-up.
3.UnitshallusePuron®refrigerant.
4.Unitshallbeinstalledinaccordancewiththemanufacturer’sinstructions.
5.Unitmustbeselectedandinstalledincompliancewithlocal,state,andfederalcodes. 238119.13.B.QualityAssurance
1.UnitmeetsASHRAE90.1-2016andIECC-2015minimumefficiencyrequirements.
2.UnitshallberatedinaccordancewithAHRIStandards340/360.
3.UnitshallbedesignedtoconformtoASHRAE15.
4.UnitshallbeETL-testedandcertifiedinaccordancewithANSIZ21.47StandardsandETL-listedandcertified underCanadianstandardsasatotalpackageforsafetyrequirements.
5.InsulationandadhesiveshallmeetNFPA90Arequirementsforflamespreadandsmokegeneration.
6.Unitinternalinsulationliningsshallberesistanttomoldgrowthinaccordancewith“moldgrowthandhumidity” testinASTMC1338,G21,andUL181orcomparabletestmethod.Airstreamsurfacesshallbeevaluatedin accordancewiththe“ErosionTest”inUL181,aspartofASTMC1071.
7.Unitcasingshallbecapableofwithstanding500-hoursaltsprayexposureperASTMB117(scribedspecimen).
8.RoofcurbshallbedesignedtoconformtoNRCAStandards.
9.Unitshallbesubjectedtoacompletelyautomatedruntestontheassemblyline.Thedataforeachunitwillbe storedatthefactory,andmustbeavailableuponrequest.
10.UnitshallbedesignedinaccordancewithULStandard1995,ETLlistedincludingtestedtowithstandrain.
11.Unitshallbeconstructedtopreventintrusionofsnowandtestedtopreventsnowintrusionintothecontrolbox upto40mph.
12.Unitshaketestedtoassurancelevel1,ASTMD4169toensureshippingreliability.
13.HighEfficiencyMotorslistedshallmeetsection313oftheEnergyIndependenceandSecurityActof2007 (EISA2007).
238119.13.C.Delivery,Storage,andHandling
1.Unitshallbestoredandhandledpermanufacturer’srecommendations.
2.Liftedbycranerequireseithershippingtoppanelorspreaderbars.
3.Unitshallonlybestoredorpositionedintheuprightposition. 238119.13.D.ProjectConditions
1.Asspecifiedinthecontract.
238119.13.E.OperatingCharacteristics
1.Unitshallbecapableofstartingandrunningat115°F(46°C)ambientoutdoortemperature,meetingmaximum loadcriteriaofAHRIStandard340/360at10%voltage.
2.Compressorwithstandardcontrolsshallbecapableofoperationfrom25°F(-4°C),ambientoutdoortemperatures.Accessorywinterstartkitis necessary ifmechanically coolingatambienttemperatures below25°F (-4°C).
3.Unitshallbecapableofsimultaneousheatingdutyanddefrostcycleoperationwhenusingaccessoryelectric heaters.
4.Unitshalldischargesupplyairverticallyorhorizontallyasshownoncontractdrawings.
5.Unitshallbefactoryconfiguredforverticalsupplyandreturnconfigurations.
6.Unitshallbefieldconvertiblefromverticaltohorizontalconfiguration.
7.Unitshallbecapableofmixedoperation:verticalsupplywithhorizontalreturnorhorizontalsupplywithvertical return.
238119.13.F.ElectricalRequirements
1.Mainpowersupplyvoltage,phase,andfrequencymustmatchthoserequiredbythemanufacturer. 238119.13.G.UnitCabinet
1.Unitcabinetshallbeconstructedofgalvanizedsteel,andshallbebonderizedandcoatedwithapre-painted
bakedenamelfinishonallexternallyexposedsurfaces.
2.Unitcabinetexteriorpaintshallbe:filmthickness,(dry)0.003inchesminimum,gloss(perASTMD523,60°F /16°C):60,Hardness:H-2HPencilhardness.
3.EvaporatorfancompartmentinteriorcabinetinsulationshallconformtoAHRIStandards340/360minimum exteriorsweatcriteria.Interiorsurfacesshallbeinsulatedwithaminimum1/2-in.thick,1lbdensity,flexible fiberglassinsulation,neoprenecoatedontheairside.Aluminumfoil-facedfiberglassinsulationshallbeusedin theheatcompartment.
4.Unitinternalinsulationliningsshallberesistanttomoldgrowthinaccordancewith“moldgrowthandhumidity” testinASTMC1338,G21,andUL181orcomparabletestmethod.Airstreamsurfacesshallbeevaluatedin accordancewiththe“ErosionTest”inUL181,aspartofASTMC1071.
5.Baseofunitshallhaveaminimumofthreelocationsforthru-the-baseelectricalconnections(factory-installed orfield-installed),standard.
6.BaseRail
a.Unitshallhavebaserailsonaminimumof2sides.
b.Holesshallbeprovidedinthebaserailsforriggingshacklestofacilitatemaneuveringandoverhead rigging.
c.Holesshallbeprovidedinthebaserailformovingtherooftopbyforktruck.
d.Baserailshallbeaminimumof16gaugethickness.
7.Condensatepanandconnections:
a.Shallbeaslopedcondensatedrainpanmadeofanon-corrosivematerial.
b.ShallcomplywithASHRAEStandard62.
c.Shallusea3/4-in.-14NPTdrainconnection,possibleeitherthroughthebottomorendofthedrainpan.
Connectionshallbemadepermanufacturer’srecommendations.
8.Toppanel:
a.Shallbeasinglepiecetoppanelon07thru09sizes,twopieceson12and14sizes.
9.ElectricalConnections
a.Allunitpowerwiringshallenterunitcabinetatasingle,factoryprepared,knockoutlocation.
b.Thru-the-basecapability.
(1.)Standardunitshallhaveathru-the-baseelectricallocation(s)usingaraised,embossedportionofthe unitbasepan.
(2.)Optional,factory-approved,water-tightconnectionmethodmustbeusedforthru-the-baseelectrical connections.
(3.)Nobasepanpenetration,otherthanthoseauthorizedbythemanufacturer,ispermitted.
10.Componentaccesspanels(standard)
a.Cabinetpanelsshallbeeasilyremovableforservicing.
b.Unitshallhaveonefactory-installed,tool-less,removable,filteraccesspanel.
c.Panelscoveringcontrolbox,indoorfan,indoorfanmotor,gascomponents(whereapplicable),andcompressorsshallhavemoldedcompositehandles.
d.HandlesshallbeUVmodified,composite,permanentlyattached,andrecessedintothepanel.
e.Screwsontheverticalportionofallremovableaccesspanelshallengageintoheatresistant,moldedcompositecollars.
f.Collarsshallberemovableandeasilyreplaceableusingmanufacturerrecommendedparts. 238119.13.H.Coils
1.StandardAluminum/CopperCoils:
a.Standardevaporatorandcondensercoilsshallhavealuminumlancedplatefinsmechanicallybondedto seamlessinternallygroovedcoppertubeswithalljointsbrazed.
b.Evaporatorcoilsshallbeleaktestedto150psig,pressuretestedto450psig,andqualifiedtoUL1995burst testat1775psig.
c.Condensercoilsshallbeleaktestedto150psig,pressuretestedto650psig,andqualifiedtoUL1995burst testat1980psig.
2.OptionalPre-coatedaluminumfincondensercoils:
a.Shallhaveadurableepoxy-phenoliccoatingtoprovideprotectioninmildlycorrosivecoastalenvironments.
b.Coatingshallbeappliedtothealuminumfinstockpriortothefinstampingprocesstocreateaninertbarrierbetweenthealuminumfinandcoppertube.
c.Epoxy-phenolicbarriershallminimizegalvanicactionbetweendissimilarmetals.
d.Corrosiondurabilityoffinstockshallbeconfirmedthroughtestingtobenolessthan1000hourssaltspray perASTMB117-90.
e.Corrosiondurabilityoffinstockshallbeconfirmedthroughtestingtohavenovisiblecorrosionafter48 hourimmersioninaroomtemperaturesolutionof5%salt,1%aceticacid.
f.Finstockcoatingshallpass2000hoursofthefollowing:oneweekexposureintheprohesionchamber followedbyoneweekofacceleratedultravioletlighttesting.Prohesionchamber:thesolutionshallcontain 3.5%sodiumchlorideand0.35%ammoniumsulfate.Theexposurecycleisonehourofsaltfogapplication atambientfollowedbyonehourdryingat95F(35C).
3.OptionalCopper-finevaporatorandcondensercoilsonallmodels:
a.Shallbeconstructedofcopperfinsmechanicallybondedtocoppertubesandcoppertubesheets.
b.Galvanizedsteeltubesheetsshallnotbeacceptable.
c.Apolymerstripshallpreventcoilassemblyfromcontactingthesheetmetalcoilpantominimizepotential forgalvaniccorrosionbetweencoilandpan.
4.OptionalE-coatedaluminum-finevaporatorandcondensercoilsonallmodels:
a.Shallhaveaflexibleepoxypolymercoatinguniformlyappliedtoallcoilsurfaceareaswithoutmaterial bridgingbetweenfins.
b.Coatingprocessshallensurecompletecoilencapsulationoftubes,finsandheaders.
c.ColorshallbehighglossblackwithglossperASTMD523-89.
d.Uniformdryfilmthicknessfrom0.8to1.2milonallsurfaceareasincludingfinedges.
e.Superiorhardnesscharacteristicsof2HperASTMD3363-92Aandcross-hatchadhesionof4B-5Bper ASTMD3359-93.
f.Impactresistanceshallbeupto160in.-lb(ASTMD2794-93).
g.Humidityandwaterimmersionresistanceshallbeuptominimum1000and250hoursrespectively(ASTM D2247-92andASTMD870-92).
h.Corrosiondurabilityshallbeconfirmedthroughtestingtobenolessthan6000hourssaltsprayperASTM B117-90.
238119.13.I.RefrigerantComponents
1.Refrigerantcircuitshallincludethefollowingcontrol,safety,andmaintenancefeatures:
a.Fixedorificemeteringsystemshallpreventmal-distributionoftwo-phaserefrigerantbyincludingmultiple fixedorificedevicesineachrefrigerationcircuit.Eachorificeistobeoptimizedtothecoilcircuititserves.
b.Refrigerantfilterdrier.
c.Servicegaugeconnectionsonsuctionanddischargelines.
d.Pressuregaugeaccessthroughaspeciallydesignedaccessportinthetoppaneloftheunit.
e.Suctionlineaccumulatortoprovideprotectioninalloperatingmodesfromcooling,heatingandreverse cycleswitching.
2.Thereshallbegaugelineaccessportinthetopoftherooftop,coveredbyablack,removableplug.
a.Theplugshallbeeasytoremoveandreplace.
b.Whentheplugisremoved,thegaugeaccessportshallenablemaintenancepersonneltoroutetheirpressure gaugelines.
c.Thisgaugeaccessportshallfacilitatecorrectandaccuratecondenserpressurereadingsbyenablingthe readingwiththecompressoraccesspanelon.
d.Theplugshallbemadeofaleakproof,UV-resistant,compositematerial.
3.Compressors
a.Unitshalluseonefullyhermetic,scrollcompressorforeachindependentrefrigerationcircuit.
b.Modelsshallbeavailablewithsinglecompressordesignson07models,plusadditional2compressor (stage)modelsfrom08-14sizes.
c.Compressormotorsshallbecooledbyrefrigerantgaspassingthroughmotorwindings.
d.Compressorsshallbeinternallyprotectedfromhighdischargetemperatureconditions.
e.Compressorsshallbeprotectedfromanovertemperatureandover-amperageconditionsbyaninternal,mo- toroverloaddevice.
f.Compressorshallbefactorymountedonrubbergrommets.
g.Compressormotorsshallhaveinternallinebreakthermal,currentoverloadandhighpressuredifferential protection.
h.Crankcaseheatersshallbeutilizedonallmodelstoprotectcompressorwithspecificrefrigerantcharge. 238119.13.J. FilterSection
1.Filtersaccessisspecifiedintheunitcabinetsectionofthisspecification.
2.Filtersshallbeheldinplacebyapivotingfiltertray,facilitatingeasyremovalandinstallation.
3.Shallconsistoffactory-installed,lowvelocity,throw-away2-in.thickfiberglassfilters.
4.Filtersshallbestandard,commerciallyavailablesizes.
5.Onlyonesizefilterperunitisallowed. 238119.13.K.EvaporatorFanandMotor
1.Evaporatorfanmotor:
a.Shallhavepermanentlylubricatedbearings.
b.Shallhaveinherentautomatic-resetthermaloverloadprotectionorcircuitbreaker.
c.Shallhaveamaximumcontinuousbhpratingforcontinuousdutyoperation;nosafetyfactorsabovethat ratingshallberequired.
2.Belt-drivenEvaporatorFan:
a.Beltdriveshallincludeanadjustablepitchmotorpulley.
b.Shallusesealed,permanentlylubricatedball-bearingtype.
c.Blowerfanshallbedoubleinlettypewithforward-curvedblades.
d.Shallbeconstructedfromsteelwithafinishthataidswithcorrosionresistanceanddynamicallybalanced. 238119.13.L. CondenserFansandMotors
1.Condenserfanmotors:
a.Shallbeatotallyenclosedmotor.
b.Shallusepermanentlylubricatedbearings.
c.Shallhaveinherentthermaloverloadprotectionwithanautomaticresetfeature.
d.Shalluseashaftdowndesignonallmodels.
2.CondenserFans:
a.Shallbeadirectdrivenpropellertypefan.
b.Shallhavealuminumbladesrivetedtosteelspidersthathavecorrosionresistantpropertiesandshallbe dynamicallybalanced.
238119.13.M.SpecialFeatures,OptionsandAccessories
1.Staged AirVolumeSystem(SAVt)forallmodels.
a.Evaporatorfanmotor:
(1.)Shallhavepermanentlylubricatedbearings.
(2.)Shallhaveamaximumcontinuousbhpratingforcontinuousdutyoperation;nosafetyfactorsabove thatrating.
(3.)ShallbeVariableFrequencydutyand2-speedcontrol.
(4.)Shallcontainmotorshaftgroundingringtopreventelectricalbearingflutingdamagebysafelydivertingharmfulshaftvoltagesandbearingcurrentstoground.
2.VariableFrequencyDrive(VFD).Onlyavailableon2-speedindoorfanmotoroption(SAV):
a.Factory-suppliedVFDsqualify,throughABB,fora12-monthwarrantyfromdateofcommissioningor18 monthsfromdateofsale,whicheveroccursfirst.
b.Shallbeinstalledinsidetheunitcabinet,mounted,wiredandtested.
c.ShallcontainElectromagneticInterference(EMI)frequencyprotection.
d.InsulatedGateBi-PolarTransistors(IGBT)usedtoproducetheoutputpulsewidthmodulated(PWM) waveform,allowingforquietmotoroperation.
e.SelfdiagnosticswithfaultandpowercodeLEDindicator.FieldaccessoryDisplayKitavailableforfurther diagnosticsandspecialsetupapplications.
f.RS485capabilitystandard.
g.Electronicthermaloverloadprotection.
h.5%swingingchokesforharmonicreductionandimprovedpowerfactor.
i.Allprintedcircuitboardsshallbeconformalcoated.
3.IntegratedEconoMi$er®IV,EconoMi$er2,andEconoMi$erXstandardleakratemodels,factoryorfield-installed.
a.Integrated,geardrivenopposingmodulatingbladedesigntypecapableofsimultaneouseconomizerand compressoroperation.
b.Independentmodulesforverticalorhorizontalreturnconfigurationshallbeavailable.Verticalreturnmodulesshallbeavailableasafactory-installedoption.
c.Damperbladesshallbegalvanizedsteelwithcompositegears.Plasticorcompositebladesonintakeorre- turnshallnotbeacceptable.
d.Shallincludeallhardwareandcontrolstoprovidefreecoolingwithoutdoorairwhentemperatureand/or humidityarebelowsetpoints.
e.Shallbeequippedwithgeardrivendampersforboththeoutdoorventilationairandthereturnairforpositiveairstreamcontrol.
f.Standardleakratemodelsshallbeequippedwithdampersnottoexceed2%leakageat1in.wgpressure differential.
g.EconomizercontrolleronEconoMi$erIVmodelsshallbeHoneywellW7212thatprovides:
(1.)CombinedminimumandDCVmaximumdamperpositionpotentiometerswithcompressorstagingrelay. (2.)Functionswithsolidstateanalogenthalpyordrybulbchangeovercontrolsensing.
(3.)ContainLEDindicatesfor:whenfreecoolingisavailable,whenmoduleisinDCVmode,whenexhaustfancontactisclosed.
h.EconomizercontrolleronEconoMi$erXmodelsshallbetheHoneywellW7220thatprovides: (1.)2-lineLCDinterfacescreenforsetup,configurationandtroubleshooting.
(2.)On-boardFaultDetectionandDiagnostics(FDD)thatsensesandalertswhentheeconomizerisnot operatingproperly,perCaliforniaTitle24.
(3.)Sensorfailurelossofcommunicationidentification. (4.)Automaticsensordetection.
(5.)Capabilitiesforusewithmultiple-speedindoorfansystems.
(6.)Utilizedigitalsensors:DrybulbandEnthalpy.
i.EconomizercontrolleronEconoMi$er2modelswithPremierLink™controllershallbe4-20mAdesignand controlledbythePremierLinkcontroller.ThePremierLinkcontrollerdoesnotcomplywithCaliforniaTitle 24FaultDetectionandDiagnostic(FDD)requirements.
j.EconomizercontrolleronEconoMi$er2modelswithRTUOpencontrollershallbea4-20mAdesigncon- trolleddirectlybytheRTUOpencontroller.RTUOpencontrollermeetsCaliforniaTitle24FaultDetection andDiagnostic(FDD)requirements.
k.Shallbecapableofintroducingupto100%outdoorair.
l.Shallbeequippedwithabarometricreliefdampercapableofrelievingupto100%returnairandcontain sealsthatmeetASHRAE90.1-2016andIECC-2015requirements.
m.Shallbedesignedtoclosedamper(s)duringloss-of-powersituationswithspringreturnbuiltintomotor.
n.Drybulboutdoorairtemperaturesensorshallbeprovidedasstandard.Enthalpysensorisalsoavailablefor factory-installedeconomizersonly.Outdoorairsensorsetpointshallbeadjustableandshallrangefrom40 to100°F(4to38°C).Additionalsensoroptionsshallbeavailableasaccessories.
o.Theeconomizercontrollershallalsoprovidecontrolofanaccessorypowerexhaustunitfunction.Factory setat100%,witharangeof0%to100%.
p.Theeconomizershallmaintainminimumairflowintothebuildingduringoccupiedperiodandprovidede- signventilationrateforfulloccupancy.
q.Dampersshallbecompletelyclosedwhentheunitisintheunoccupiedmode.
r.Economizercontrollershallaccepta2-10VdcCO2sensorinputforIAQ/DCVcontrol.Inthismode, dampersshallmodulatetheoutdoorairdampertoprovideventilationbasedonthesensorinput.
s.CompressorlockouttemperatureonW7220isadjustablefrom-45°Fto80°F,setatafactorydefaultof 32°F.Othersshallopenat35°F(2°C)andcloseat50°F(10°C).
t.Actuatorshallbedirectcoupledtoeconomizergear.Nolinkagearmsorcontrolrodsshallbeacceptable.
u.Economizercontrollershallprovideindicationswheninfreecoolingmode,intheDCVmode,ortheex- haustfancontactisclosed.
4.IntegratedEconoMi$er®2,andEconoMi$erXUltraLowLeakratemodels,factoryorfield-installed.
a.Integrated,geardrivenopposingmodulatingbladedesigntypecapableofsimultaneouseconomizerand compressoroperation.
b.Independentmodulesforverticalorhorizontalreturnconfigurationshallbeavailable.Verticalreturnmod- ulesshallbeavailableasafactory-installedoption.
c.Damperbladesshallbegalvanizedsteelwithcompositegears.Plasticorcompositebladesonintakeorre- turnshallnotbeacceptable.
d.Shallincludeallhardwareandcontrolstoprovidefreecoolingwithoutdoorairwhentemperatureand/or humidityarebelowsetpoints.
e.Shallbeequippedwithgeardrivendampersforboththeoutdoorventilationairandthereturnairforposi- tiveairstreamcontrol.
f.UltraLowLeakdesignmeetsCaliforniaTitle24section140.4andASHRAE90.1-2016andIECC-2015 requirementsfor4cfmpersq.ft.ontheoutsideairdampersand10cfmpersq.ft.onthereturndampers.
g.EconomizercontrolleronEconoMi$erXmodelsshallbetheHoneywellW7220thatprovides: (1.)2-lineLCDinterfacescreenforsetup,configurationandtroubleshooting.
(2.)On-boardFaultDetectionandDiagnostics(FDD)thatsensesandalertswhentheeconomizerisnot
operatingproperly,perCaliforniaTitle24.
(3.)Sensorfailurelossofcommunicationidentification. (4.)Automaticsensordetection.
(5.)Capabilitiesforusewithmultiple-speedindoorfansystems.
(6.)Utilizedigitalsensors:DrybulbandEnthalpy.
h.EconomizercontrolleronEconoMi$er2modelswithRTUOpencontrollershallbea4-20mAdesigncon- trolleddirectlybytheRTUOpencontroller.RTUOpencontrollermeetsCaliforniaTitle24FaultDetection andDiagnostic(FDD)requirements.
i.Shallbecapableofintroducingupto100%outdoorair.
j.Shallbeequippedwithabarometricreliefdampercapableofrelievingupto100%returnairandcontain sealsthatmeetASHRAE90.1-2016andIECC-2015requirements.
k.Shallbedesignedtoclosedamper(s)duringloss-of-powersituationswithspringreturnbuiltintomotor.
l.Drybulboutdoorairtemperaturesensorshallbeprovidedasstandard.Enthalpysensorisalsoavailablefor factory-installedeconomizersonly.Outdoorairsensorsetpointshallbeadjustableandshallrangefrom40 to100°F(4to38°C).Additionalsensoroptionsshallbeavailableasaccessories.
m.Theeconomizercontrollershallalsoprovidecontrolofanaccessorypowerexhaustunitfunction.Factory setat100%,witharangeof0%to100%.
n.Theeconomizershallmaintainminimumairflowintothebuildingduringoccupiedperiodandprovidede- signventilationrateforfulloccupancy.
o.Dampersshallbecompletelyclosedwhentheunitisintheunoccupiedmode.
p.Economizercontrollershallaccepta2-10VdcCO2sensorinputforIAQ/DCVcontrol.Inthismode, dampersshallmodulatetheoutdoorairdampertoprovideventilationbasedonthesensorinput.
q.CompressorlockouttemperatureonW7220isadjustablefrom-45°Fto80°F,setatafactorydefaultof 32°F.Othersshallopenat35°F(2°C)andclosesat50°F(10°C).
r.Actuatorshallbedirectcoupledtoeconomizergear.Nolinkagearmsorcontrolrodsshallbeacceptable.
s.Economizercontrollershallprovideindicationswheninfreecoolingmode,intheDCVmode,ortheex- haustfancontactisclosed.
5.Two-PositionDamper(factory-installed)
a.DampershallbeaTwo-PositionDamper.Dampertravelshallbefromthefullclosedpositiontothefield adjustable%-opensetpoint.
b.Dampershallincludeadjustabledampertravelfrom25%to100%(fullopen).
c.Dampershallincludesingleordualblade,geardrivendampersandactuatormotor.
d.Actuatorshallbedirectcoupledtodampergear.Nolinkagearmsorcontrolrodsshallbeacceptable.
e.Damperwilladmitupto100%outdoorairforapplicablerooftopunits.
f.Dampershallcloseuponindoor(evaporator)fanshutoffand/orlossofpower.
g.Thedamperactuatorshallplugintotherooftopunit’swiringharnessplug.Nohardwiringshallberequired.
h.Outsideairhoodshallincludealuminumwaterentrainmentfilter
i.NotavailablewithStagedAirVolume(SAV™)models.
6.HeadPressureControlPackage(Motormaster®)
a.Controllershallcontrolcoilheadpressurebycondenserfanspeedmodulationorcondenserfancyclingand windbaffles.
b.Shallconsistofsolidstatecontrolandcondensercoiltemperaturesensortomaintaincondensingtemperature between90°F(32°C)and110°F(43°C)atoutdoorambienttemperaturesdownto-20°F(-29°C).
7.CondenserCoilHailGuardAssembly
a.Shallprotectagainstdamagefromhail.
b.Shallbelouvereddesign.
8.Unit-Mounted,Non-FusedDisconnectSwitch:
a.Switchshallbefactory-installed,internallymounted.
b.NationalElectricCode(NEC)andULapprovednon-fusedswitchshallprovideunitpowershutoff.
c.Shallbeaccessiblefromoutsidetheunit.
d.Shallprovidelocalshutdownandlockoutcapability.
e.Sizedonlyfortheunitasorderedfromthefactory.Doesnotaccommodatefield-installeddevices.
9.ConvenienceOutlet:
a.Poweredconvenienceoutlet.
(1.)Outletshallbepoweredfrommainlinepowertotherooftopunit.
(2.)Outletshallbepoweredfromlinesideorloadsideofdisconnectbyinstallingcontractor,asrequiredbycode.Ifoutletispoweredfromloadsideofdisconnect,unitelectricalratingsshallbeETLcertified andratedforadditionaloutletamperage.
(3.)Outletshallbefactory-installedandinternallymountedwitheasilyaccessible115-vfemale receptacle.
(4.)Outletshallinclude15ampGFIreceptacleswithindependentfuseprotection.
(5.)Voltagerequiredtooperateconvenienceoutletshallbeprovidedbyafactory-installedstepdown transformer.
(6.)Outletshallbeaccessiblefromoutsidetheunit.
(7.)Outletshallincludeafield-installed“WetinUse”cover.
b.Factory-InstalledNon-Poweredconvenienceoutlet.
(1.)Outletshallbepoweredfromaseparate115-120vpowersource. (2.)Atransformershallnotbeincluded.
(3.)Outletshallbefactory-installedandinternallymountedwitheasilyaccessible115-vfemalereceptacle.
(4.)Outletshallinclude15ampGFIreceptacles. (5.)Outletshallbeaccessiblefromoutsidetheunit.
(6.)Outletshallincludeafield-installed“WetinUse”cover.
c.Field-InstalledNon-Poweredconvenienceoutlet.
(1.)Outletshallbepoweredfromaseparate115-120vpowersource.
(2.)Atransformershallnotbeincluded.
(3.)Outletshallbefield-installedandinternallymountedwitheasilyaccessible115-vfemalereceptacle. (4.)Outletshallinclude20ampGFIreceptacles.Thiskitprovidesaflexibleinstallationmethodwhich
allowscodecomplianceforheightrequirementsoftheGFCIoutletfromthefinishedroofsurfaceas
wellasthecapabilitytorelocatetheoutlettoamoreconvenientlocation. (5.)Outletshallbeaccessiblefromoutsidetheunit.
(6.)Outletshallincludeafield-installed“WetinUse”cover.
10.Thru-the-BaseConnectors:
a.Kitsshallprovideconnectorstopermitelectricalconnectionstobebroughttotheunitthroughtheunitbasepan.
b.Minimumofthreeconnectionlocationsperunit.
11.PropellerPowerExhaust:
a.Powerexhaustshallbeusedinconjunctionwithanintegratedeconomizer.
b.Independentmodulesforverticalorhorizontalreturnconfigurationsshallbeavailable.
c.Horizontalpowerexhaustshallbemountedinreturnductwork.
d.Powerexhaustshallbecontrolledbyeconomizercontrolleroperation.Exhaustfansshallbeenergizedwhen dampersopenpastthe0-100%adjustablesetpointontheeconomizercontrol.
12.RoofCurbs(Vertical):
a.Fullperimeterroofcurbwithexhaustcapabilityprovidingseparateairstreamsforenergyrecoveryfromthe exhaustairwithoutsupplyaircontamination.
b.Formedgalvanizedsteelwithwoodnailerstripandshallbecapableofsupportingentireunitweight.
c.Permitsinstallationandsecuringofductworktocurbpriortomountingunitonthecurb.
13.HighStaticIndoorFanMotor(s)andDrive(s):
a.Highstaticmotor(s)anddrive(s)shallbefactory-installedtoprovideadditionalperformancerange.
14.Thru-the-BottomUtilityConnectors:
a.Kitshallprovideconnectorstopermitgasandelectricalconnectionstobebroughttotheunitthroughthe basepan.
15.OutdoorAirEnthalpySensor:
a.Theoutdoorairenthalpysensorshallbeusedtoprovidesingleenthalpycontrol.Whenusedinconjunction withareturnairenthalpysensor,theunitwillprovidedifferentialenthalpycontrol.Thesensorallowsthe unittodetermineifoutsideairissuitableforfreecooling.
16.ReturnAirEnthalpySensor:
a.Thereturnairenthalpysensorshallbeusedinconjunctionwithanoutdoorairenthalpysensortoprovide differentialenthalpycontrol.
17.IndoorAirQuality(CO2)Sensor:
a.Shallbeabletoprovidedemandventilationindoorairquality(IAQ)control.
b.TheIAQsensorshallbeavailableinductmount,wallmount,orwallmountwithLEDdisplay.Theset- pointshallhaveadjustmentcapability.
18.Smokedetectors(Factory-InstalledOnly):
a.ShallbeaFour-WireControllerandDetector.
b.Shallbeenvironmentalcompensatedwithdifferentialsensingforreliable,stable,anddrift-freesensitivity.
c.Shallusemagnetactivatedtest/resetsensorswitches.
d.Shallhavetool-lessconnectionterminalaccess.
e.Shallhavearecessedmomentaryswitchfortestingandresettingthedetector.
f.Controllershallinclude:
(1.)Onesetofnormallyopenalarminitiationcontactsforconnectiontoaninitiatingdevicecircuitona firealarmcontrolpanel.
(2.)TwoForm-Cauxiliaryalarmrelaysforinterfacewithrooftopunitorotherequipment.
(3.)OneForm-Csupervision(trouble)relaytocontroltheoperationoftheTroubleLEDonaremotetest/ resetstation.
(4.)Capableofdirectconnectiontotwoindividualdetectormodules.
(5.)Canbewiredtoupto14otherductsmokedetectorsformultiplefanshutdownapplications.
19.Horn/StrobeAnnunciator
a.Providesanaudible/visualsignalingdeviceforusewithfactory-installedoptionorfield-installedaccessory smokedetectors.
(1.)Requiresinstallationofafield-supplied24-vtransformersuitablefor4.2VA(AC)or3.0VA(DC)per horn/strobeaccessory.
(2.)Requiresfield-suppliedelectricalbox,NorthAmerican1-gangbox,2-in(51mm)x4-in(102mm). (3.)Shallhaveaclearcoloredlens.
20.WinterStartkit
a.Shallcontainabypassdevicearoundthelow-pressureswitch.
b.Shallberequiredwhenmechanicalcoolingisrequireddownto25°F (-4°C).
c.Shallnotberequiredtooperateonaneconomizerwhenbelowanoutdoorambientof40°F(4°C).
21.TimeGuard
a.Shallpreventcompressorshortcyclingbyprovidinga5-minutedelay(2minutes)beforerestartingacom- pressoraftershutdownforanyreason.
b.Onedeviceshallberequiredpercompressor.
22.ElectricHeat:
a.HeatingSection
(1.)Heaterelementopencoilresistancewire,nickel-chromealloy,0.29inchesinsidediameter,strungthrough ceramicinsulatorsmountedonmetalframe.Coilendsarestakedandweldedtoterminalscrewslots.
(2.)Heaterassembliesareprovidedwithintegralfusingforprotectionofinternalheatercircuitsnot exceeding48ampseach.Autoresetthermolimitcontrols,magneticheatercontactors(24Vcoil)and terminalblockallmountedinelectricheatercontrolbox(minimum18gagalvanizedsteel)attachedto endofheaterassembly.
23.HingedAccessPanels
a.Shallprovideeasyaccessthroughintegratedquarterturnlatches.
b.Shallbeonmajorpanelsof:filters,controlbox,fanmotorandcompressor.
24.DisplayKitforVariableFrequencyDrive
a.KitallowstheabilitytoaccesstheVFDcontrollerprogramstoprovidespecialsetupcapabilitiesanddiagnostics.
b.Kitcontainsdisplaymoduleandcommunicationcable.
c.DisplayKitcanbepermanentlyinstalledintheunitor used onanySAV™systemVFDcontrollerasneeded.
25.CondensateOverflowSwitch
a.Thissensorandrelatedcontrollermonitorsthecondensatelevelinthedrainpanandshutsdown compressionoperationwhenoverflowconditionsoccur.Itincludes:
(1.)Indicatorlight-solidred(morethan10secondsonwatercontact-compressorsdisabled),blinking red(sensordisconnected).
(2.)10seconddelaytobreak-eliminatesnuisancetripsfromsplashingorwavesinpan(sensorneeds10 secondsofconstantwatercontactbeforetripping).
(3.)Disablesthecompressor(s)operationwhencondensateplugisdetected,butstillallowsfanstorunfor Economizer.
26.ManualDamper
a.ManualDamperpackageshallconsistofdamper,airinletscreen,andrainhoodwhichcanbepresettoadmitupto25or50%outdoorairforyear-roundventilation.NotavailablewithStagedAirVolume(SAV™) models.
27.SupplyDuctCover:(14sizeonly.)
a.Requiredwhenfieldconvertingthefactorystandardverticalductsupplytohorizontalductsupplyconfiguration.Onerequiredperunit.
28.DisconnectSwitchBracket(14sizeonly)
a.Providesapre-engineeredandsizedmountingbracketforapplicationsrequiringaunitmountedfusedand non-fuseddisconnectofgreaterthan100amps.Bracketassuresthatnodamagewilloccurtocoilswhen mountingwithscrewsandotherfasteners.