ICM Controls ICM333 Application/Install Guide

ICM333

Head Pressure Control with

Optional Heat Pump Override

Regulates head pressure via

temperature or pressure input

Installation, Operation & Application Guide

For more information on our complete range of American-made

products – plus wiring diagrams, troubleshooting tips and more,

visit us at www.icmcontrols.com

Caution!

Installation of the ICM333 shall be performed by trained technicians only. Adhere to all local and national electric codes. Disconnect all power to the system before making any connections.

• Line voltage:120,208,240,277,480and600VAC

• Control voltage:18-30VAC

• Frequency:50-60Hz

• Operating temperature:-40ºFto+176ºF(-40°Cto+75°C)

• Probes: –Temperature:Thermistor,10Kohmat77°F(25°C)

 –Pressure:ICM380(orderedseparately)

• Heat pump override:24VACN.C.orN.O.

• Weight:12ounces(341grams)

Speciﬁcations

Note: TheICM333shouldbeappliedtomotorsandequipmentthathavebeendesignatedbytheir

respectivemanufacturersascapableofbeingspeedcontrolled.

• Mounting:

 – Surfacemountusing(2)#8screws

 – TheICM333shouldbesurfacemountedtoacleanmetalorotherthermallyconductivesurface

formaximumheatdissipation

 – ItisrecommendedthattheICM333bemountedawayfromthecondenserexhaustairinorderto

maintainloweroperatingtemperatures

LIAF010-1

7313 William Barry Blvd., North Syracuse, NY 13212

(Toll Free) 800-365-5525 (Phone) 315-233-5266 (Fax) 315-233-5276

www.icmcontrols.com

ONE-YEAR LIMITED WARRANTY

TheSellerwarrantsitsproductsagainstdefectsinmaterialorworkmanshipforaperiodofone(1)

yearfromthedateofmanufacture.TheliabilityoftheSellerislimited,atitsoption,torepair,replace

orissueanon-casecreditforthepurchasepricesofthegoodswhichareprovidedtobedefective.

Thewarrantyandremediessetforthhereindonotapplytoanygoodsorpartsthereofwhichhave

beensubjectedtomisuseincludinganyuseorapplicationinviolationoftheSeller’sinstructions,

neglect,tampering,improperstorage,incorrectinstallationorservicingnotperformedbytheSeller.

InordertopermittheSellertoproperlyadministerthewarranty,theBuyershall:1)NotifytheSeller

promptlyofanyclaim,submittingdatecodeinformationoranyotherpertinentdataasrequestedby

theSeller.2)PermittheSellertoinspectandtesttheproductclaimedtobedefective.Itemsclaimed

tobedefectiveandaredeterminedbySellertobenon-defectivearesubjecttoa$30.00perhour

inspectionfee.ThiswarrantyconstitutestheSeller’ssoleliabilityhereunderandisinlieuofanyother

warrantyexpressed,impliedorstatutory.Unlessotherwisestatedinwriting,Sellermakesnowarranty

thatthegoodsdepictedordescribedhereinaretforanyparticularpurpose.

Example

1.Onlyoneprobetypecanbeusedatatime,temperatureorpressure.Uptotwo

probesofakindcanbeusedinwhichcasethecontrolwillrespondtotheprobe

thatsensesthehighesttemperatureorpressure.

2.AtypicalinstallationisshowninAppendix.Thetemperatureprobecanbe

attachedtotheU-bend.Usetheprovidedthermo-tapetosecuretheprobetothe

placeofattachment.

3.Whenusingapressureprobe,installitonthedischargelinetransducertting.

4.TemperatureandPressureprobesareconnectedtoICM333asshownin

respectivewiringdiagramsbelow.

Installing and Connecting the Probe

BLUE

WHITE

GREEN

RED

BLACK

PRESSURE TRANSDUCER

BLUE

WHITE

GREEN

RED

BLACK

PRESSURE TRANSDUCER

TEMPERATURE

PROBE

TEMPERATURE

PROBE

Connections for ICM333 at 120/208/240/277 VAC

1.Removepowerfromsystem.

2.FieldinstallawirefromLine 1wiretoLine 1terminal.

3.CutLine 2wire;afxmotorsidetoMotor 2terminal

andlinesidetoLine 2terminal.

4.Make24VACandtemperatureprobeconnections.

5.Verifywiringiscorrect.

6.Powerupsystemandcheckoperation.

Typical

condenser fan

PSC

Fan

Motor

Run

Capacitor

120/208/240/277

VAC

PSC

Fan

Motor

Run

Capacitor

Field

Installed

Wire

Line

120/277

VAC

Line

Motor

120/208/240/277

VAC

Connections for Heat Pump System at 120/208/240/277 VAC

1.Removepowerfromsystem.

2.FieldinstallawirefromLine 1wiretoLine 1terminal.

3.CutLine 2wire;afxthecommonfromthedefrost

board’sfanrelaytotheMotor 2terminalandtheLine

fromthecontactortotheLine 2terminal.

4.Make24VAC,probeandHPconnections.

5.Verifywiringiscorrect.

6.Powerupsystemandcheckoperation.

Field

Installed

Wire

PSC

Fan

Motor

Run

Capacitor

Fan

Relay

COM NC

Defrost Board

120/208/240/277

VAC

Line

120/240/277

VAC

Line

Motor

Connections for Heat Pump System at 480/600 VAC

1.Removepowerfromsystem.

2.FieldinstallawirefromLine 1wiretoLine 1terminal.

3.CutLine 2wire;afxthecommonfromthedefrost

board’sfanrelaytotheMotor 2terminalandtheLine

fromthecontactortotheLine 2terminal.

4.Make24VAC,probeandHPconnections.

5.Verifywiringiscorrect.

6.Powerupsystemandcheckoperation.

Connections for ICM333 at 480/600 VAC

1.Removepowerfromsystem.

2.FieldinstallawirefromLine 1wiretoLine 1terminal.

3.CutLine 2wire;afxmotorsidetoMotor 2terminal

andlinesidetoLine 2terminal.

4.Make24VACandtemperatureprobeconnections.

5.Verifywiringiscorrect.

6.Powerupsystemandcheckoperation.

Typical

condenser fan

PSC

Fan

Motor

Run

Capacitor

Line

Motor

Field

Installed

Wire

PSC

Fan

Motor

Run

Capacitor

Line

Motor

Field

Installed

Wire

PSC

Fan

Motor

Run

Capacitor

Fan

Relay

COM NC

Defrost Board

DuringtheHard Startmode,fullvoltageisappliedtothemotorduringstartuptoovercomewindmillingandtolubricatethebearings.

Thepositionofthehardstartdialdeterminesthetimeperiodofthehardstartmode.Thedialcanbeadjustedbetween0.2secondsandapproximately4seconds.

Setthehardstartdialaccordingtothetypeofmotoryouhave.Ifyouhaveaball bearing motor,setthehardstartdialtotheMINposition.Ifyouhaveasleeve bearing motor,setthe

hardstartdialtothemiddleofthesleevebearingrange.

Afteryoubeginattherecommendedsetting,youcannetunethehardstarttimewithintherecommendedrangeforthetypeofmotoryouhave.

Itisrecommendedthatyouusetheminimumpossiblehardstarttimetoavoidblowingtoomuchcoldairoverthecondenser.

Thehardstartmodeappliesfullvoltagetothemotorforthesettimeperiod.Afterwards,themotorspeedisdictatedbythetemperaturesensor(s).

Setting the Hard Start Speed

Thecutoutspeeddialadjuststhemotorvoltagerange.Setthecutoutvoltagedialaccordingtothetypeofmotoryouhave.

Sleeve Bearing Motors: Setthecutoutspeeddialtothemiddleofthesleevebearingrange.Inthisrange,themotorcanrundownapproximately40-50%of

thefulllinevoltage,whichallowssufcientRPMsforcoolingandlubrication.

CAUTION!:



Withsleevebearingmotors,itisimportantnottoadjustoutsidethesleevebearingrangeorbearingfailuremayresult.

Ball Bearing Motors:SetthecutoutspeeddialtotheMINpositionintheballbearingrange.Thispositionoffersthegreatestrangeofspeedcontrol.Atthe

MINsettingthemotorcanrundowntoapproximately20-30%ofthefulllinevoltage.

Note:Afterstartingattherecommendedsettingsforeithersleeveorballbearingmotors,youcannetunethecutoutspeedtoachievethedesiredresults.

Setting the Cutout Speed

Mode of Operations

Whenusingtemperatureprobes,thecontrolwillmaintaincondensertemperaturebetween7°Faboveand7°FbelowdialedTemperatureSetpoint.ThedialTemperatureSetpointrangeis70°Fto140°F

Whenusingpressureprobes,thecontrolwillmaintaincondenserpressurebetween20psigaboveand20psigbelowdialedPressureSetpoint.ThedialPressureSetpointrangeis35psigto465psig.

Theisnocorrelationbetweendialtemperatureandpressurescalesonthecontrol

Whenthemotorstartsrunningitwillhardstartforthelengthoftimedictatedbythehardstartdialsetting.Afterthehardstarttimehaselapsed,themotorspeediscontrolledbytheprobereading,temperatureor

pressure.Thegreenlightturnsonwhenthemotorrunsatfullspeed.

Asthesensedtemperature/pressuredecreases,theoutputvoltagedecreases.Theyellowlightturnsonduringmotorvariablespeed.Theoutputvoltagemaydecreasetothedeterminedcutoutspeeddictatedby

thecutoutspeeddial.Uponreachingthecutoutspeedsetting,theoutputvoltagegoestozerovolts.Theyellowlightturnsoff.

Appendix BAppendix A

°C °F Resistance (KΩ)

0° 32° 32.7

5° 41° 25.4

10° 50° 19.9

15° 59° 15.7

20° 68° 12.5

25° 77° 10.0

30° 86° 8.1

35° 95° 6.5

40° 104° 5.3

45° 113° 4.4

50° 122° 3.6

Pressure

(psig)

Voltage

(Vdc)

0 0.5

50 0.9

100 1.3

150 1.7

200 2.1

250 2.5

300 2.9

350 3.3

400 3.7

450 4.1

500 4.5

Temperature vs. Probe Resistance Pressure vs. Voltage

1.TheHeat Pumpterminalsacceptthe24VACsignalfromthereversingvalveholdingcoil.Makeaparallel

connectionfromthereversingvalvetotheHPterminals.

 Note:Do not apply a voltage higher than 30 VAC to the HP terminals.

2.IftheHeat PumpisintheHeatingmodeandthereversingvalveisenergized,then

theHeat Pump SelectjumpermustbeintheDefault(N.O.)position.

3.IftheHeat PumpisintheHeatingmodeandthereversingvalveisnotenergized,

thentheHeat Pump SelectjumpermustbeintheN.C.position.

N.O.

N.C.

Connections for Heat Pump Systems

Troubleshooting

Symptom Problem

Unitfailstostart UsinganACvoltmeter,measurethevoltagebetweenthe24VACterminals.Itshouldreadapproximately24volts.MeasurethelinevoltagebetweenLINE1andLINE2to

conrmthatlinevoltageispresent.

Iflightsareashingalternativelythennoprobeisconnectedormalfunctionprobe.

Whenusingatemperatureprobe,disconnectitanduseanohmmetertomeasuretheresistancebetweenthewires.ItshouldmatchthechartinAppendixA.

Whenusingapressureprobe,withpowerappliedtothecontroluseavoltmetertomeasurevoltsDCbetweenCOMMandP1orP2,wherethewireisconnected.Thereading

shouldbeaccordingtothechartinAppendixB.

Thefuseisblownand/orsignsof

damageontheunit

Theunithasbeenmiswiredandmaybepermanentlydamaged.

ThefancyclesfromONtoOFF

withlittleornospeedmodulation

Reducehard startstettingtominimumneededtoacceleratethefan.Excessivehardstartcauseslargepressuredropsbyrunningtoomuchcoldairoverthecondenser.

Shouldthecyclingpersist,relocatethetemperatureprobeupthecondensertoincreasesensitivitytotemperaturechangeand/oradjustthetemperaturesetpoint.

Thehighpressureswitchtripsoff SeeUnitfailstostartabove

Checkthesetpointandreduceitifneeded

1.For non-heat pump applications,theheatpumpselectjumpermustbeintheDefault(N.O.)position,andtheHPterminalsmustbeleftunconnected.

2.SettheCutoutSpeedandtheHardStartTimetotheappropriatepositionsforthetypeofmotoryouhave(seebelow).

Connections for Air Conditioning Only

ICM333 Typical Installation

Condenser

Sensor

ICM333

canmonitor

twocondensers

Motor