ICM Controls ICM2805A Installation guide

Brand: ICM Controls

Model: ICM2805A

Type: Installation guide

ICM Controls ICM2805A is a replacement control board for G3RC, G4, G5, G6, M2 and M3 furnace models. It features self-diagnostic capability with fault codes displayed via a blinking LED, making troubleshooting easier. Installation requires turning off the power supply, removing the old board, and connecting the wires and connectors to the new board. A wiring diagram is provided for assistance. The board also comes with a one-year limited warranty.

 Thisboardshouldbeinstalledbyaqualiedtechnician

only.Failuretofollowtheseinstructionscouldleadto

propertydamage,personalinjuryordeath.

 Disconnectthepowersupplybyturningoffacircuit

breakerorremovingafusebeforeattemptingtoinstall

thisboard.

1.Turnoffthepowersupplytothefurnacebyremovingthefuseor

turningoffthecircuitbreaker.

2.Removethewiresandconnectorsfromtheoldboardoneat

atime.CarefullyconnectthemtotheICM2805Atopreventa

miswire.Removethemountingscrewsandthenremovetheold

controlboard.

3.Placethetemplate(onthebackofthissheet)inthecontrolbox

andsecurewithtape.Moveallwiresoutofthewayandcarefully

drillfour3/16”diameterholesasshownonthetemplate.

Removeanddiscardthetemplate.

4.MounttheICM2805Awiththefuseatthetopbyinsertingthe

standoffsintothemountingholes.

NOTE:Do not ex the ICM2805A circuit board. Apply pressure

only at the standoffs.

5.Disconnectthe6-pinconnectorplug.UsinganAMPextractor

tool#458994-2removethebluewirefromsocketposition#4

andinstallitinposition#1.(seediagramatright).Ifthetoolis

notavailableproceedasfollows:

 Cutoffthebluewireatsocketposition#4intheconnector(see

diagramatright),andstriptheinsulationback3/8”.Insertthe

lengthofbluewireprovidedinsocketposition#1,nexttothecut

offbluewire.Reconnectthe6-pinconnectorplug.Connectthe

looseendsofthebluewiresusingthewirenutprovided.Tape

thewirenutconnectionwithelectricaltapesoitcannotloosen.

6.ApplythenewwiringdiagramforG4furnacessuppliedwiththe

ICM2805Atotheinsideofthecabinet.

7.Turnonthepowersupplyandcheckthefurnaceforproper

operation.

G3RC and G4 Furnace Models

ICM2805A 1.Turnoffthepowersupplytothefurnacebyremovingthefuseor

turningoffthecircuitbreaker.

2.Removethewiresandconnectorsfromtheoldboardoneat

atime.CarefullyconnectthemtotheICM2805Atopreventa

miswire.Removethecontrolbracketmountingscrewsfrom

theoutsideofthecabinet(exceptG5RLmodels).Installthe

newcontrolbracketandthenproceedtostep4.Ifthescrews

arenotaccessible,newmountingholesmustbedrilledinthe

existingmountingbracketusingthetemplateonthebackofthis

instructionsheet.

3.Removethescrewsecuringtheoldcontrolboardandthen

removetheoldcontrolboard.Placethetemplate(onthebackof

thissheet)overthemountingbracketandsecurewithtape.Move

allwiresoutofthewayandcarefullydrillfour3/16”diameterholes

asshownonthetemplate.Removeanddiscardthetemplate.

4.MounttheICM2805Awiththefuseatthetopbyinsertingthe

standoffsintothemountingholes.

NOTE:Do not ex the ICM2805A circuit board. Apply pressure

only at the standoffs.

5.ApplythenewwiringdiagramforG5furnacessuppliedwiththe

ICM2805Atotheinsideofthecabinet.

6.Turnonthepowersupplyandcheckthefurnaceforproper

operation.

G5 Furnace Models

1.Turnoffthepowersupplytothefurnacebyremovingthefuseor

turningoffthecircuitbreaker.

2.Removethewiresandconnectorsfromtheoldboardoneat

atime.CarefullyconnectthemtotheICM2805Atopreventa

miswire.

3.Removetheoldboardbycuttingoffthestandoffs.Installthe

ICM2805Ainthesamepositionbysnappingthestandoffsintothe

mountingholes.

 NOTE:Do not ex the ICM2805A circuit board. Apply pressure

only at the standoffs.

4.Turnonthepowersupplyandcheckthefurnaceforproper

operation.

G6, M2 & M3 Furnace Models

6-pinwireconnector

Whitewire

Blackwire

Bluewirecut

InsertedBluewire

(provided)

ExistingBluewire

(Previouslycutfromslot4)

Whitewire

Blackwire

ExistingBluewire

(Tobecut&connected

towireprovided)

Cutexistingblue

wirehere

InsertBluewire

(provided)

6-pinwireconnector

7313WilliamBarryBlvd.,NorthSyracuse,NY13212

(TollFree)800-365-5525(Phone)315-233-5266(Fax)315-233-5276

www.icmcontrols.com

ONE-YEAR LIMITED WARRANTY

TheSellerwarrantsitsproductsagainstdefectsinmaterialorworkmanshipforaperiodofone(1)

yearfromthedateofmanufacture.TheliabilityoftheSellerislimited,atitsoption,torepair,replace

orissueanon-casecreditforthepurchasepricesofthegoodswhichareprovidedtobedefective.

Thewarrantyandremediessetforthhereindonotapplytoanygoodsorpartsthereofwhichhave

beensubjectedtomisuseincludinganyuseorapplicationinviolationoftheSeller’sinstructions,

neglect,tampering,improperstorage,incorrectinstallationorservicingnotperformedbytheSeller.

InordertopermittheSellertoproperlyadministerthewarranty,theBuyershall:1)NotifytheSeller

promptlyofanyclaim,submittingdatecodeinformationoranyotherpertinentdataasrequestedby

theSeller.2)PermittheSellertoinspectandtesttheproductclaimedtobedefective.Itemsclaimed

tobedefectiveandaredeterminedbySellertobenon-defectivearesubjecttoa$30.00perhour

inspectionfee.ThiswarrantyconstitutestheSeller’ssoleliabilityhereunderandisinlieuofanyother

warrantyexpressed,impliedorstatutory.Unlessotherwisestatedinwriting,Sellermakesnowarranty

thatthegoodsdepictedordescribedhereinaretforanyparticularpurpose. LIAF117-1

G5RLModels:Foldbackonline

G5RLModelsonly:Foldpaperbackalongdashedlineandplacethis

corneronlower-leftcornerofmontingpanel.

AllG4andG5furnaces,exceptG5RLModels:

Placethiscornerofthetemplateinthecornerofthecontrolbox,nexttocutout(G4),

oronlower-rightcornerofmountingpanel(G5)

Unsethistemplateto

carefullydrill(4)3/16”holes.

ICM2805A Fault Codes

LED’S Flashes FaultCondition

Red ON Normaloperation

1Flash Limitswitchesopen

2Flashes Pressureswitchstuckopen

3Flashes Pressureswitchstuckclosed

4Flashes Ignitionfailure(5trials)

5Flashes HotandNeutralreversedornoground

6Flashes Brownoutvoltage

Continuous FaultameorGasvalverelayshort

Yellow Continuous LowameorNoame

ON Flamepresent

Thiscontrolhasbuilt-inself-diagnosticcapability.Ifasystemproblemoccurs,ablinkingLEDshowsafaultcode.

ICM Controls ICM2805A Installation guide

ICM Controls ICM2805A Installation guide

ICM Controls ICM2805A Installation guide

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