Installation Manual

• Line voltage:120,208,240,and480VAC
• Control voltage:18-30VAC
• Frequency:50-60Hz
• Operating temperature:-40ºFto+176ºF(-40°Cto+75°C)
• Sensors:10Kohmsat77°F(25°C)
• Heat pump override:24VACN.C.orN.O.
 Note:Amaximumofthreesensorscanbeconnectedtothecontrol.
• Weight:12ounces(341grams)
 Note:The ICM325HN 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ICM325HNshouldbesurfacemountedtoacleanmetalorotherthermallyconductivesurfacefor
maximumheatdissipation
 – ItisrecommendedthattheICM325HNbemountedawayfromthecondenserexhaustairinordertomaintain
loweroperatingtemperatures
Specifications
Installation of the ICM325HN 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!
ICM325HN
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
Head Pressure
Control with
Optional
Heat Pump Override
Temperature sensitive
control regulates
head pressure
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.
ICM325HN Typical Installation
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 ICM325HNV at 120/208/240 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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
VAC
PSC
Fan
Motor
Run
Capacitor
Field
Installed
Wire
Line
1
120/240
VAC
Line
2
Motor
2
120/208/240
VAC
Field
Installed
Wire
PSC
Fan
Motor
Run
Capacitor
Fan
Relay
COM NC
Defrost Board
120/208/240
VAC
Line
1
120/240
VAC
Line
2
Motor
2
Connections for Heat Pump System at 120/208/240 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 ICM325HNV 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