7313 William Barry Blvd.
North Syracuse, NY 13212
ICM CONTROLS 800.365.5525
www.icmcontrols.com LIAF107-1
FEATURES SPECIFICATIONS
ICM292
Gas Ignition Control Board
• Control voltage:24VAC(18-30VAC),60Hz
• Line voltage:115VAC,60Hz
• Power consumption:0.3Aplusgasvalvecurrentat24VAC
• Operating temperature:-40°C(-40°F)to75°C(176°F)
Timing
• Pre-purge:30seconds
• Trial for ignition:7seconds
• Retries:Twogroupsoftwo,30secondsdelaywithinthe
groupand3minutesdelaybetweengroups
• Lockout:1hour
• Post-purge:90,120,160and180seconds
Inputs
• Power:24VACandCOM
• Thermostat interface:R,W,YandG
• System switches:VentPressureandLimitswitches
(MainandOver-temperatureswitchesinseries)
• Flame Sensing
• Heat blower OFF delay: SW1toggleswitch
Install New Control
1. Groundyourself.Whenhandlingcircuitboard,holditbytheedges.
2. Fastencircuitboardwithretainingscrews.
3. Connectalllinevoltage,lowvoltage,andaccessorywires.
4. Verifythesequenceofoperation.
Safety Considerations
Onlytrainedpersonnelshouldinstallorserviceheatingequipment.Whenworkingwithheatingequip-
ment,besuretoreadandunderstandallprecautionsinthedocumentation,onlabels,andontags
thataccompanytheequipment.Failuretofollowallsafetyguidelinesmayresultindamagetoequip-
ment,severepersonalinjuryordeath.
Introduction
TheICM292DSIgasignitioncontrolreplacesthefollowingRheemmodel:62-24140-04.TheICM292
hasincorporatedLEDdiagnosticstoassistintroubleshooting.Faultcodeinformationcanbefound
inthisapplicationguide.Pleasekeepthisapplicationguidewiththefurnaceinstallationmanualfor
futurereference.
Electrostatic Discharge (ESD) Precautions
CAUTION!
Use caution when installing and servicing the furnace to avoid and control electrostatic discharge;
ESD can impact electronic components. These precautions must be followed to prevent
electrostatic discharge from hand tools and personnel. Following the precautions will protect the
control from ESD by discharging static electricity buildup to ground.
1. Disconnectallpowertothefurnace.Donottouchthecontrolorthewiringpriortodischargingyour
body’selectrostaticchargetoground.
2. Togroundyourself,touchyourhandandtoolstoaclean,metal(unpainted)furnacesurfacenear
thecontrolboard.
3. Servicethefurnaceaftertouchingthechassis.Yourbodywillrechargewithstaticelectricityasyou
shufeyourfeetormovearound,andyoumustregroundyourself.
4. Regroundyourselfifyoutouchungroundeditems.
5. Beforehandlinganewcontrol,regroundyourself;thiswillprotectthecontrol.Storeusedandnew
controlsinseparatecontainersbeforetouchingungroundedobjects.
6. ESDdamagecanalsobepreventedbyusinganESDservicekit.
AWcallfromthethermostatwillengagetheInducerDraftmotor.TheVentPressureswitchcloses.
Ignitionsequencebegins,gasvalveandsparkareengaged,providingthatsystemsafetyswitches
(MainandOver-temperatureswitchesinseries)areclosed.TheBlowermotorwillengageatHEAT
speed20secondsafterameisestablishedandsensed.OnWcallsatisfaction,theInducermotor
turnsoffafter10secondsandBlowermotorturnsoffaccordingtoHeatBlowerOffdelaysetting.
AGcallfromthethermostatwillengageBlowermotorwithoutdelayatFANspeed.Itdisengages
withoutdelaywhenGcallisremoved.
AYcallfromthethermostatwillengageBlowermotorwithoutdelayatCOOLspeed.Itdisengages
45secondsafterYcallissatised.
Sequence of Operation
Flame not established
1. Ifameisnotestablishedduringthe7secondinitialsequencethenthecontrolwillstartthenext
trialforignitionin30seconds.
2. Therewillbetwomoreattemptstoigniteafter3minutedelay,30secondsapartbeforethe
respectivefaultcodeistriggeredandignitiontrialsarestopped.
3.Thegasvalveisenergizedonlyduringtheignitionsequenceof7seconds.
4. Blowermotorisoffuntil20secondsafterameisestablished.
Flame out
1. Flameoutisconsideredwhenameislostduringheating.
2. WhenWsignalispresentandameisnotsensed,thengasvalvewilldisengageuntilthenexttrial
forignition
3. Ifameisnotestablishedontheimmediatesequence(2above)thenthecontrolwillcontinuewith
additionaltrialsforignition
4. InducerandBlowermotorswillcontinuerunningduringameoutscenario
Flame out of sequence
1. FlameoutofsequencerepresentsascenariowhenameissensedwhileWsignalisnotpresent.
2. InducerandBlowermotorswillbeengaged(ifnotalreadyrunning)andkeeprunningforaslongas
thefaultconditionispresent.
3.Thereis1hourlockoutbeforeaWcallcanbeexecutedoronpowerreset
Troubleshooting Tips
LED Fault Codes
Outputs
• Spark:SE
• Gas Valve:GV
• Inducer draft motor:IDM
• Blower motor:FAN,COOLand
HEATspeeds
• Electric Air Cleaner:EAC
• Humidier relay:HUM
• Heat/Cool relay:H/C
LED indicators
• Power, green LED:PWR
• Status, green LED:OK
• Flame status, yellow LED:FLAME
• Direct Spark Ignition (DSI) control board
• Microprocessor-based
• Controls inducer motors, air cleaner (if equipped), humidier (if
equipped), spark ignitor and the gas valve
• Monitors timing, trial for ignition, system switches, ame sensing
and lockout
• 100% lockout safety feature
• Compatible with LP or Natural Gas
• LED indication for status and fault codes to aid in troubleshooting
• Replaces: Rheem 62-24140-04
LEDS Flashes Fault condition
GREEN ON Normaloperation
1Flash Ignitionfailure(4trials)
2Flashes Pressureswitchstuckopen
3Flashes Limitswitchesopen
4Flashes Pressureswitchstuckclosed
5Flashes Twinfault
6Flashes Brownoutvoltage
7Flashes Hotandneutralreversedornoground
Continuous Gasvalverelayshort
YELLOW RapidBlink Flameoutofsequence
SlowBlink Lowameornoame
ON Flamepresent
CAUTION!
To service control, and prior to disconnection, label all wires. Failure to do so may result in wiring
errors that can cause dangerous operation.
Remove Existing Control
1. TurnthermostattoOFFpositionorsetittothelowestpossiblesetting.
2. TurnOFFelectricalsupplytofurnace.
3. TurnOFFgassupplytofurnace.
CAUTION:Failure to turn off gas and electric supplies can result in explosion, re, death, or
personal injury.
4. Removefurnaceblowerandcontrolaccessdoors.
5. Disconnectthermostatwiresandhumidierwires(ifequippedwithahumidier).
6. Disconnectlinevoltage,blower,electronicaircleanerwires(ifequipped),andtransformerwires.
7. Removescrewsandanyotherfasteners,andtheoldcircuitboard.
8. Examinecontrolandcontrolboxtocheckforwaterstains.
9. Makerepairsifanysourcesofwaterleakagearefound.Besuretocheckhumidiers,evaporator
coils,andventsystemsintheareaofthecontrol.