Specifications

FAN AnalogOutput 2-10VDC OutputsignalsenttotheVFDtomodulatethespeedoftheindoorblower
motor
ECON AnalogOutput 2-10VDC Outputsignalsenttotheeconomizeractuatortomodulatepositionofthe
returnairandoutdoorairdampers
EXH AnalogOutput 0-10VDC Outputsignalsenttomodulatingpowerexhaustcontrol(VFDormod
dampers)tomaintainbuildingstaticpressure
HWV AnalogOutput 2-10VDC OutputsignalsenttoafieldinstalledHotWaterCoiltomaintainsupplyair
temperature.
EXH~ BinaryOutput 24VAC Signalusedtoturnon/offthepowerexhaustrelay.
HGR BinaryOutput 24VAC Outputsignalusedtoturnon/offtheHotGasReheatValve.
H1 BinaryOutput 24VAC Outputsignalusedtoturnon/offthefirststageofheating
H2 BinaryOutput 24VAC Outputsignalusedtoturnon/offthesecondstageofheating
VAVBOX BinaryOutput N.O.Relay Usedtodrivethebuilding'sVAVboxestofull-openduringheatingoperation.
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SEQUENCE OF OPERATION
VARIABLE AIR VOLUME (VAV) Operation
Avariableairvolume(VAV)optionusingavariablefrequency
drive(VFD)shallbeavailableforapplicationsrequiringa
constantsupplyductstaticpressure.Adifferentialpressure
transducershallmonitorsupplyductstaticpressureandreturn
aspeedreferencesignaltotheVFDtocontroltheoutputofthe
indoorblowermotor.
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DUCT STATIC PRESSURE Control
A0-5"WCpressuretransducer,locatedinthecontrolbox
compartment,shallsensestatic(gauge)pressureinthesupply
airductandconvertthispressuremeasurementtoa
proportional0-5VDCelectricaloutput.
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Pressure-transmittingplastictubing(1/4"diameter)shallbe
fieldsuppliedandinstalledfromthetransducertoboththe
ductworkandtotheatmosphere.Connectthetubingfromthe
'HIGH'pressuretapofthetransducertoastaticpressuretap
(fieldsupplied)inthesupplyductlocatedatapointwhere
constantpressureisexpected.Topreventanunstablesignal
duetoairturbulence,thereshouldbenoobstructions,turnsor
VAVterminalboxesup-ordown-streamofthesensingtube
locationforatleastadistanceof6-10timestheductdiameter.
Tubingmustalsoberunbetweenthe'LOW'pressuretapofthe
transducerandatmosphericpressure(outsideoftheunit).
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TheIntelli-ComfortIIcontrolboardisusedtoconvertthe
pressuretransducerinputsignalintoaspeedreferencesignal
thatthedriveusestocontrolthespeedoftheblowermotor.
Thismodulatingspeedreferencesignalisgeneratedusingan
algorithmwhichcontinuouslycalculatesanoutputvalue.
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Programmablesetpoints:
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Theductstaticsetpointisthepressurethatthedrivewill
maintainwhenoperatingtheunitinVAVmode.Theset-pointis
adjustablebetween0"WCand5"WCwiththedefaultsettingof
1.5"WC.
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Theductstatichigh-limitsetpointisthemaximumallowable
ductpressuretopreventdamagefromover-pressurizationof
theductworkintheeventofeitheradriveordamperfailure.
Thehigh-limitset-pointshallbeadjustablebetween0"WCand
5"WCwiththefactorydefaultsettingof4.5"WC.Iftheduct
staticpressurereachesthehigh-limitsetpoint,thenthesupply
fanmotorshallshutdown.
NOTE: Eitherofthesetpointsdescribedaboveshallbe
adjustablethroughtheunitcontrolboard(UCB)withtheuseof
aUSB-to-RS485converter,personalcomputerorPDAanda
down-loadedcopyoftheSimplicity®softwareavailableatthe
UPGnetCommercialProductCatalogwebsite.
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RefertotheIntelli-ComfortIIDataMaptableattheendofthis
documentforacompletelistoftheboard'spro-grammableset
pointsanddefaults.
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FACTORY-INSTALLED VFD
Thefactory-installedVFDshallbemountedintheBlower
AccessCompartment.Thedriveshallbefactorywiredto
includeboth3-phasepowerandcontrolconnections(runpermit
signal,speedreferencesignalandfaultsignal).
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Allrequireddriveparametersshallbepre-programmedatthe
factory.
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Forunitsalsoequippedwithgas/electricheat,aterminalblock
locatedintheunit'scontrolboxandconnectedtotheIntelli-
ComfortIIboard's"VAVBOX"terminal,shallbefieldwiredto
thebuilding'sVAVboxestoensurefullyopendampersduring
heatingoperation.
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MANUAL BYPASS VFD
Anoptional,factory-installedmanualbypassswitchshallbe
availablewithfactory-installedVFDcanbefoundintheBlower
MotorAccesscompartmentandhasthefollowingthree
positions:
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• DRIVE -routespowerthroughtheVFDformodulating
controloftheindoorblowermotor.
UnitarySalesToolv1.5.8.0 Informationissubjecttochangewithoutnotice.Checklocalcodes. Printed10/20/2014
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SIMPLICITY® Intelli-Comfort II
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