Variable Speed EC MotorWith Orbus™ Controller

What is EC Motor Technology?

• Electroniccommutation(EC),sometimesreferredtoasbrushlessdirectcurrent(BLDC)

• Offersupto59%greaterefficiencythanashaded-polemotor

• Offersupto35%greaterefficiencythanapermanentsplitcapacitor(PSC)motor

BENEFITS & ADVANTAGES

• Providesadramaticimprovementinstableheadpressureandliquidtemperature

• Providesasignificantreductioninfanmotorpowerconsumption

• Providesamorestablesystem• Improvesproductintegrity• Improvescompressordurability• Reducesenergyconsumption

What is Variable Speed EC Motor Technology?

• Theabilitytocontrolspeedisautomaticandallowsformoreefficientcontroloverthespeedofthemotor

• Runsatnearfullefficiencywhetheritisatstart-up,fullspeedoranyspeedinbetween

• Hasanoperatingspeedbetween200-1500rpm

The Variable Speed EC motor with Orbus Controller system incorporates the latest advances in micro-processor controls and motor technology to provide the most efficient condenser motors in the industry using integrated variable speed technology. The system is a variable speed EC motor paired with Heatcraft Worldwide Refrigeration proprietary Orbus Controller.

• Significantperformanceimprovement&energysavings• ExclusiveVariableSpeedEC(VSEC)motorfor1/2to6HPcondensingunits• ProprietaryOrbusControllerforVariableSpeedECMotordevelopedbyHeatcraft

WorldwideRefrigeration• ControllerstandardwithVariableSpeedECMotoroption

Annual Energy Consumption Comparrison

AnnualEnergyConsumption

VariableSpeedECMotorsgeneratedanannualsavingsof$138whencomparedtotraditionalmotorsina5HPHermeticHighTempCondensingUnit.

Energy Savings with Variable Speed EC systems

ThetablebelowprovidessomeexamplesofsavingscustomerscanexpectwiththevariablespeedECsystem.

ThesavingsforallthreesystemsiscalculatedbycomparingtheenergysavingsofECmotorstoacomparablesystemwithfixedspeedPSCmotorsandheadpressurevalve(setatthestandard170psig)

• Assuminganelectricitycostof$0.08/kWH,withavariablespeedsystemanendusercanseesavingsofupto$336annually

• Savingsincorporatednotonlythefanmotorsavings,butalsocompressorenergysavingsresultingfromalower,morestableheadpressuresettingof125psig

The Difference between a Head Pressure Valve and Variable Speed System

ThevariablespeedECsystemtakestheplaceoftheheadpressurevalveandreducesrefrigerantcharge.TheVSECsystemwillnotonlyprovidestableheadpressure,butbecausethefansarerunningatareducedspeed,

willalsoprovideareductioninenergyconsumption.

How does the Orbus Controller work?

Allofthecommunicationelectronicsnecessaryforvariablespeedarebuiltintothemotorhousing.Tocontrolthespeedofthemotor,ananalogsignal(0-10VDC)issuppliedtothemotor.Themotorinterpretstheanalogsignalandchangesthespeedproportionallytomatchtheinputsignal.

• TheOrbusControllermeasuressystemheadpressure,comparesthemeasurementstotheheadpressuresetpoint,andthroughaproprietaryalgorithmoutputsa0-10VsignaltothevariablespeedECMotor.

• TheOrbusControllerhastwopredefinedsetpointsselectablebyajumper.ForR-404Asystemsthesetpointis150psig.

• TodiagnoseissueswiththeOrbusController,ithasablinkingLEDthatwillprovidestatus/errorcodestoaidintroubleshooting.

IfthereisaproblemwiththeOrbusController,itcanbedisconnectedandthefanswillrunfullspeed.

$136

$75

$200

$0

$100

$200

$300

$400

5 HP Hermetic High Temp 5 HP Semi-Hermetic High Temp 3 HP Hermetic High Temp

Fan Motor Savings Compressor Savings

$336$313

$211

NOTE: When compared to a standard condensing unit system with head pressure valve setting at 185 lbs. vs. controller head pressure setting of 125 lbs.

0.5

1.0

1.5

2.0

1.01.1

1.6$177

$136$136Ann

ual E

nerg

y Sa

ving

s

End

Use

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(Yea

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REDUCED OPERATING COST

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0% 20% 40% 60% 80% 100%% Speed

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REDUCED POWER USAGE

2175WestParkPlaceBlvd·StoneMountain,GA30087P:770.465.5600·F:770.465.5990heatcraftrpd.com

Heatcraft Worldwide Refrigeration