ICM Controls ICM330 User manual

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
Installation of the ICM330 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.
Caution!
• Line voltage:120,208,240,277,and480VAC
• Control voltage:18-30VAC
• Current:4ampsmaximum
• 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)
Note:TheICM330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
 – ItisrecommendedthattheICM330bemountedawayfromthecondenserexhaustairinorderto
maintainloweroperatingtemperatures
Specifications
ICM330
Head Pressure Control with
Optional Heat Pump Override
Regulates head pressure via temperature or pressure input
Connections for ICM330 at 120/208/240/277 VAC
1. Removepowerfromsystem.
2. FieldinstallawirefromLine 1wireto120/280 VAC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,probeandHPconnections.
5. Verifywiringiscorrect.
6. Powerupsystemandcheckoperation.
FieldInstalledWire
1. Removepowerfromsystem.
2. FieldinstallawirefromLine 1wireto480 VAC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,probeandHPconnections.
5. Verifywiringiscorrect.
6. Powerupsystemandcheckoperation.
Connections for ICM330 at 480 VAC
Field
Installed
Wire
Connections for Heat Pump System at 480 VAC
1.Removepowerfromsystem.
2.FieldinstallawirefromLine 1wireto480 VAC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 Heat Pump System at 120/208/240/277 VAC
1.Removepowerfromsystem.
2.FieldinstallawirefromLINE 1wireto120/280VAC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.
Example
1.Onlyoneprobetypecanbeusedatatime,temperatureORpressure.
2.AtypicalinstallationisshowninAppendixsection.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.AtemperatureorpressureprobeisconnectedtoICM330asshowninthe
respectivewiringdiagrambelow.
Installing and Connecting the Probe
TemperatureProbe
BLUEWHITEGREENREDBLACK
PRESSURE TRANSDUCER
Field Installed Wire
PSC
Fan
Motor
Run
Capacitor
Fan
Relay
COM NC
Defrost Board
Field Installed Wire
PSC
Fan
Motor
Run
Capacitor
Fan
Relay
COM NC
Defrost Board
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

Mode of Operations
Whenusingatemperatureprobe,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apressureprobe,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minimumvoltagedictatedbythe
cutout speeddial.Astemperature/pressuredecreasesfurther,theoutputvoltagegoestozerovolts.
Theyellowlightturnsoff.
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
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/pressuresensor.
Setting the Hard Start Speed
Appendix 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
Temperature vs. Probe Resistance
Appendix B
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
Pressure vs. Voltage
ICM330 Typical Installation
Condenser
Sensor
Sensor
ReversingValveforHeat
Pump
T-Stat
Control
Transformer
Terminaltobe
usedfor480VAC
Line1
Line2
LineVoltage Motor1
Motor2
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.Checkwiringtothefanmotor.
Iflightsareashingalternativelythennoprobeisconnectedormalfunctioning
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GNDandVout.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motor.
Excessivehard startcauseslargepressuredropsbyrunningtoomuchcold
airoverthecondenser.
Reducecutoutsettingtominimumneededforthemotorinuse.
Shouldthecyclingpersist,relocatethetemperatureprobeupthecondenser
toincreasesensitivitytotemperaturechangeand/oradjustthetemperature
setpoint.
Thehighpressure
switchtripsoff
See“Unitfailstostart”above
Checkthesetpointandreduceitifneeded
Troubleshooting
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HEAT PUMPterminals.
 Note:Do not apply a voltage higher than 30 VAC to the HEAT PUMP 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.
Connections for Heat Pump Systems
N.O.
N.C.
LIAF069-1
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.