ICM Controls ICM325HN User 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
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,probeandHPconnections.
5. Verifywiringiscorrect.
6. Powerupsystemandcheckoperation.
Connections for ICM325HN at 480 VAC
PSC
Fan
Motor
Run
Capacitor
480VAC
Typical condenser fan
Line
1
480VAC
Line
2
Motor
2
PSC
Fan
Motor
Run
Capacitor
480VAC
Field
Installed
Wire
Typical condenser
fanwithICM325HN
installed
Connections for ICM325HN 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,probeandHPconnections.
5. Verifywiringiscorrect.
6. Powerupsystemandcheckoperation.
PSC
Fan
Motor
Run
Capacitor
Line
1
120/240
VAC
Line
2
Motor
2
PSC
Fan
Motor
Run
Capacitor
Field
Installed
Wire
Typical condenser
fanwithICM325HN
installed
120/208/240
VAC
Typical condenser fan
120/208/240
VAC
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 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.
2. SettheCutout SpeedandtheHard Start
Timetotheappropriatepositionsforthetype
ofmotoryouhave(seeotherside).
TemperatureProbe24VAC
Additional
Probes
ProbeS1
HP
HeatPump
SelectJumper
DefaultPosition
ICM325HN Typical Installation

ICM Controls ICM325HN Specifications

General

Brand	ICM Controls
Model	ICM325HN
Category	Control Unit
Language	English