ICM Controls ICM288 - User Manual

ICM
288
FURNACE CONTROL MODULE
7313 William Barry Blvd.
North Syracuse, NY 13212
ICM CONTROLS 800.365.5525
www.icmcontrols.com
LII362-1
CAUTION!
Failure to turn off gas and electric supplies can result in explosion, fire, personal injury or death.
DANGER!
Only trained personnel should install or service heating equipment. When working with heating equipment, be sure to read and understand
all precautions in the documentation, on labels, and on tags that accompany the equipment. Failure to follow all safety guidelines may
result in damage to equipment, severe personal injury or death.
FAN
120 VAC
TRANSFORMER
TO SECOND ICM288
FOR TWINNING
WIRING DIAGRAM
ELECTRICAL RATINGS
• Voltage Range: Line (98 to 132 VAC) @60HZ
• Ignitor: 5A, 120 VAC
• Fan blower: 10A, 2 HP, 240 VAC
• Cool blower: 10A, 2 HP, 240 VAC
• Heat blower: 5A, ½ HP, 250 VAC
• Inducer blower: 4A, 120 VAC
• Gas Valve: 1A, 24 VAC
• Humidifier motor: 10A, 120 VAC
TIMING
• Prepurge Heat: 60 seconds
• Prepurge Cool: 1 second
• Postpurge Heat: 90-180 seconds
• Postpurge Cool: 40 seconds
• Trial for Ignition: 10 seconds
SPECIFICATIONS
P1
1 – N/C
2 – 24 VAC Common
3 – Limit switch
4 – Gas valve
5 – Pressure switch OUT
6 – Pressure switch IN
7 – Flame sensor
8 – Limit switch IN
9 – 24 VAC Common
P2
1 – HSI
2 – N/C
3 – 120 VAC Neutral
4 – Inducer
5 – N/C
6 – 120 VAC Neutral
PIN CONNECTIONS
FAN
120 VAC
TRANSFORMER
TO SECOND ICM288
FOR TWINNING
FAN
120 VAC
TRANSFORMER
TO SECOND ICM288
FOR TWINNING
The HEAT speed air blower off time delay is selectable for 90 seconds, 120 seconds, 160
seconds or 180 seconds using top two positions of SW1.
The COOL speed air blower off time is fixed for 40 seconds.
The G (Fan) mode, the Fan blower off time is fixed for 1 second.
BLOWER TIMING
OFF Time SWITCH 1 SWITCH 2
90 OFF ON
120 OFF OFF
160 ON OFF
180 ON ON
DIP SWITCH SETTINGS
• SW1 SWITCHES 1 & 2
SW1 Switch 3: Single or TWIN systems
SW1 Switch 4: Select 1st or 2nd stage
• SW1 SWITCHES 3 & 4
1. Disconnectallpowertothefurnace.Donottouchthecontrolorthewiring
priortodischargingyourbody’selectrostaticchargetoground.
2. Togroundyourself,touchyourhandandtoolstoaclean,metal(unpainted)
furnacesurfacenearthecontrolboard.
3. Servicethefurnaceaftertouchingthechassis.Yourbodywillrechargewith
staticelectricityasyoushufeyourfeetormovearound,andyoumust
regroundyourself.
4. Regroundyourselfifyoutouchungroundeditems.
5. Beforehandlinganewcontrol,regroundyourself;thiswillprotectthe
control.Storeusedandnewcontrolsinseparatecontainersbefore
touchingungroundedobjects.
6. ESDdamagecanalsobepreventedbyusinganESDservicekit.
ESD PREPARATION
CarefullyremoveallwiringfromtheOEMboardandremoveOEMBoardfrom
furnace.
InstalltheICM288boardandreinstallwiresasperoriginalinstallation.
IMPORTANT:There are some Furnace models which performed ame
sense differently. Please read the information below before
testing the furnace!
1. Units without a separate ame sensorwillrequirepurchaseofaRheem
FlamesensorKittobewiredtopin7ofthe9pinharnessofthefurnace.
2. Units with a separate ame sensor which is NOT routed through the
9 pin harnesswillrequireremovalofamesensorwirefromexisting
connectionandrewiringittopin7ofthe9pinharnessofthefurnace.
3. Unitswhichhaveaseparateamesensorroutedtopin7ofthe9pin
harnessdonotrequirerework.
INSTALLATION

ICM Controls ICM288 Specifications

General

Brand	ICM Controls
Model	ICM288
Category	Control Unit
Language	English

Summary

Safety Information

DANGER! Safety Warning

Critical safety warning regarding unqualified personnel working with heating equipment.

CAUTION! Electrical Hazard Warning

Warning about potential explosion, fire, or injury from gas and electric supplies.

ESD Preparation and Installation

ESD Preparation Steps

Procedure for grounding yourself and handling controls to prevent electrostatic discharge damage.

Installation Guidelines

Instructions for removing the old board, installing the ICM288, and wiring.

Flame Sensor Rework Instructions

Specific instructions for models with different flame sensor routing.

Control Module Specifications and Wiring

Electrical Ratings Specifications

Details on voltage range and current ratings for various components.

Pin Connections Guide

Description of terminal pin assignments for the control module.

Furnace Wiring Diagram

Schematic illustrating the wiring connections for the ICM288 control module.

Configuration and Timing Settings

DIP Switch Configuration

Settings for SW1 switches 1-4 to configure system type and blower timing.

Blower Timing Options

Explanation of selectable heat speed air blower off-time delays.

Advanced Wiring Configurations

Twinning Wiring Diagrams

Diagrams for connecting the ICM288 in a twin system setup.

Troubleshooting and Diagnostics

Fault Codes and LED Diagnostics

Table listing LED flash codes and their corresponding fault conditions.