Installation Manual

ICM326HN / ICM327HN
Line Voltage Head Pressure Control
With built-in transformer Optional heat pump override
ICM326HN ICM327HN
• Line voltage:120,208/240,and480VAC
• Frequency:50-60Hz
• Output:10ampmaximum,100mAminimum
• Operating temperature:-40ºFto+176ºF(-40°Cto+75°C)
• Sensors:10Kohmsat25°C
• Heat pump override:N.C.orN.O.
 Note: Amaximumofthreesensorscanbeconnectedtothecontrol
• Weight:12ounces(341grams)
 Note: TheICM326HNandICM327HN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(4)#8screws
 – TheICM326HNandICM327HNshouldbesurfacemountedtoacleanmetalorotherthermally-conductive
surfaceformaximumheatdissipation
 – ItisrecommendedthattheICM326HNandICM327HNbemountedawayfromthecondenserexhaustairto
maintainloweroperatingtemperatures
ELECTRICAL SHOCK HAZARD – InstallationoftheICM326HNandICM327HNshallbeperformedby
trainedtechniciansonly.Adheretoalllocalandnationalelectriccodes.Disconnectallpowertothesystem
beforemakingconnections.
Specifications
Installation of the ICM326HN and ICM327HN 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!
Connecting the Probe
Example
1. Installthetemperatureprobeseveralbendsintothecondenser.Itcanbeattachedtothe
U-bendorplacedbetweenthensintheupper1/3ofthecondenser(seeothersidefor
moreinformation).
 Note: Theresponseofthesystemcanbenetunedbyrepositioningtheprobe.Place
theprobeonthecondenserwhereitis100°Fwhenpressuresarecorrectfor
bestresponse.
2. ConnectthetwowiresfromthesensortotheterminalblockwhereitismarkedPROBE S1.
Ifadditionalprobesarenecessaryformultiplerefrigerantcircuits,theymaybeattachedto
terminalsmarkedPROBE S2andPROBE S3.
 Note: Thecontrolwillrespondtotheprobethatsensesthehighesttemperature.
Connections for Heat Pump System at 480 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.
Line
1
480 VAC
Line
2
Motor
2
480 VAC
Field
Installed
Wire
PSC
Fan
Motor
Run
Capacitor
Fan
Relay
COM NC
Defrost Board
Connections for Air Conditioning Only
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.
HeatPump
SelectJumper
DefaultPosition
ProbeS1
ProbeS2
ProbeS3
HP
Temperature
Probe
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VAC
PSC
Fan
Motor
Run
Capacitor
Field
Installed
Wire
Line
1
120 VAC
Line
2
Motor
2
120 VAC
Connections for ICM327HN at 480 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.
Line
1
480 VAC
Line
2
Motor
2
480 VAC
Field
Installed
Wire
PSC
Fan
Motor
Run
Capacitor
Typical
condenser fan
PSC
Fan
Motor
Run
Capacitor
Field
Installed
Wire
PSC
Fan
Motor
Run
Capacitor
Fan
Relay
COM NC
Defrost Board
208/240
VAC
Line
1
240 VAC
Line
2
Motor
2
Connections for Heat Pump System at 208/240 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 Heat Pump Systems
 Note: HPterminalswillnotrecognize24VAC.Linevoltagemustbeapplied(120,208/240,or480VAC).
1. Theheatpumpterminalsacceptthelinevoltagesignalfromthereversingvalveholdingcoil.Makeaparallel
connectionfromthereversingvalveto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.
ConnectParallelto
ReversingValve
HeatPump
SelectJumper
DefaultPosition
ProbeS1
ProbeS2
ProbeS3
HP
Temperature
Probe
RV
Connections for ICM326HN at 120 VAC