Specifications


• LINE (or BYPASS) -routespowerdirectlytothemotor
whichprovidesfull-speedmotoroperationandcomplete
electricalisolationofthedrive.
• TEST -routespowertotheVFDbutnottothemotorto
allowfordriveprogrammingand/ordiagnostics.
Ifadrivefailureoccurs,theunitdoesnotautomaticallyswitchto
bypassmode.TheLINE/DRIVE/TESTswitchmustbemanually
switchedtotheLINE(BYPASS)position.Ifthereisacallforthe
fan,theindoorblowermotorwillrunatfull-speedwhileinthe
bypassmode.

VFD without VAV controller (BAS Ready)
This optional configuration does not contain the Intelli-
Comfort II control board.Terminalblocksareprovidedinthe
controlbox(inplaceoftheIntelli-ComfortIIcontrolboard)forfield
wiringofacustomer-installedBAStoreceive24VACpowerandto
connecttothefollowingcontrolsignals:
•
aductstaticpressuretransducerinputsignal(0-5VDC)(DPT
transducerisfactoryinstalled)
•
aneconomizeractuatoroutputsignal(2-10VDC)
•
aVFDspeedreferenceoutputsignal(2-10VDC)

Theuseofshieldedcableisrecommendedfortheab
ovecontrolwiringconnections.

'VFD-READY' FOR CUSTOMER-INSTALLATION
Unitsconfiguredas'CustomerSuppliedVFD'shallprovide
provisionsforacustomer-installeddrive.

Theunitshallbeprovidedwithamountingbracketinstalledinthe
BlowerAccesscompartmentwhichmayaccommodateother
vendor'sdrivesdependingontheirsize.Inordertoutilizetheunit's
mountingbracket,themaximumrecommendeddrivedimensions
areasfollows:

For5-hpmotorapplications......................13"Hx6"Wx7"D

For7.5thru15-hpmotorapplications.......13"Hx8"Wx8"D

Ifthedrivewillnotfitintheallottedspace,thenitwillneedtobe
mountedelsewhere;eitherwithinthebuildingonaperpendicular
wallwhichisnotsubjectedtoexcessivetemperature,vibration,
humidity,dust,corrosivegas,explosivegas,etc.,orwithinan
appropriateenclosureratedforoutsideinstallationtosafeguard
againstmoisture,dustandexcessiveheat.

Thepowerleadstothedrive(L1,L2,L3)andfromthemotor(T1,
T2,T3)alongwiththerespectivegroundwiresaresuppliedwith
theunitandneedtobeconnectedafterthedriveisinstalled.

Aterminalblocklocatedinthecontrolboxshallbeprovidedforfield
connectionoftheVFDspeedreferencesignal(2-10VDC)andto
thenormally-open,run-permitauxiliarycontact.
Theuseofshieldedcableisrecommendedfortheabove
controlwiringconnections.

ForVFD-ready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.

Constant Volume (CV) Operation
Space Sensor Control Option
Unitsconfiguredas'SpaceSensorcontrolled'shallprovidefor
constantvolumeoperationwithawallmountedspacesensor.
UnitControllershallhavethecapabilityofacceptingOccupied
andUnoccupiedtemperaturesettings.

UnitControllershalloperatefromthefactoryinstalledReturn
AirTemperatureSensorintheabsenceofaspacesensor.

Thermostat Only Control Option
Unitsconfiguredas'Thermostatcontrolled'shallprovidefor
constantvolumeoperationwithastandardwallmountedspace
thermostat.

IntelliSpeed Supply Fan Control Option
Unitsconfiguredas'IntelliSpeedSupplyFanOperation'shall
provideforvariablevolumesupplyfanoperationwitha
standardwallmountedspacethermostatorspacesensor.

SupplyfanshallbeequippedwithaVFDtomodulatethe
supplyfanspeed.Thefanshalloperateathighspeed
(adjustable)whenequipmentisoperatingatfullcoolingor
heatingcapacity.Thefanshalloperateatmediumspeed
(adjustable)whenequipmentisoperatingatreducedcoolingor
heatingcapacity.Thefanshalloperateatlowspeed
(adjustable)whenequipmentisoperatinginafanonly
operation.

Economizershallhavethecapabilityofchangingtheminimum
damperpositionbasedonthesupplyfanspeed.

SIMPLICITY® COMPRESSOR CONTROL
1
.
Theunitcontrollershallhaveafive-minuteAnti-Short
CycleDelaytopreventexcessivecompressor
cycling.
2
.
Theunitcontrollershallhaveathree-minute
minimumruntimetoinsurethatoilisreturnedtothe
compressoreachtimeitstarts.Theminimumruntime
shallbeprogrammableupto10minutes.
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
Page:11
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