Counterflow Gas or oil Heating Appliance · appliances or domestic hot water equipment, where the...

CMF2 80-PG Convertible (65, 75, & 85 KbtU/H inPUts)CMF2 80-Po Convertible (65, 75, & 85 KbtU/H inPUts)

Counterflow Gas or oil Heating Appliance

instAllAtion instrUCtions

Do not DestroY. KeeP in A sAFe PlACe For FUtUre reFerenCe.

Fire or eXPlosion HAZArD• Failuretofollowsafetywarningsexactlycould

resultinseriousinjuryorpropertydamage.• Installationandservicemustbeperformed

byaqualifiedinstaller,serviceagencyorthegas supplier.

• Do not store or use gasoline or otherflammablevaporsandliquidsinthevicinityofthisoranyotherappliance.

WHAt to Do iF YoU sMell GAs• Donottrytolightanyappliance.• Donot touchanyelectrical switch;donot

useanyphoneinyourbuilding.• Leavethebuildingimmediately.• Immediately call your gas supplier from a

neighborsphone.Followthegassuppliersinstructions.

• Ifyoucannot reachyourgassupplier,callthefiredepartment.

WArninG:

Attention instAllers:It is your responsibility to know this product better than your customer. This includes being able to install the product according to strict safety guidelines and instructing the customer on how to operate and maintain the equipment for the life of the product. Safety should always be the deciding factor when installing this product and using common sense plays an important role as well. Pay attention to all safety warnings and any other special notes highlighted in the manual. Improper installation of the furnace or failure to follow safety warnings could result in serious injury, death, or property damage.

These instructions are primarily intended to assist qualified individuals experienced in the proper installation of this appliance. Some local codes require licensed installation/service personnel for this type of equipment. Please read all instructions carefully before starting the installation. Return these instructions to the customer’s package for future reference.

For installation in:• ManufacturedHomes• RecreationalVehicles,ParkModels,&Manufactured

Buildings• ModularHomes/Buildings

2

tAble oF Contents

ImportantSafetyInformation ....................................3

Requirements&Codes ..............................................3MinimumInstallationClearances ..............................4

CombustionAir&VentingRequirements ................5General Information ...................................................6CombustionAirQuality ..............................................6DirectVentFurnaces .................................................7

ManufacturedHousingInstallations .......................7Residential Installations .........................................7

VentingthroughaChimney .......................................8VentiaireIIIorIVAirQualityPackage .......................8

CirculatingAirRequirements ....................................9Plenums&AirDucts .................................................9

SupplyAirConnections ..........................................9Dampers ................................................................9

Unconditioned Spaces ..............................................9ClosetInstallations ....................................................9FurnaceFilter ..........................................................10

Furnace installation ..................................................10General Information .................................................10BeforeYouInstallthisFurnace ................................10Locating the Unit .....................................................10MA-200BaseInstallation ........................................11InstallingthefurnaceonanMA-200Base ..............12MA-100UniversalBaseInstallation ........................12InstallingthefurnaceonanMA-100Base ..............12CombustionAirDuct/PipeInstallation ...................13SRJ Roof Jack Installation ......................................13Damper Installation .................................................14CB-200ACottageBaseInstallation .........................14

Fuel Connections .....................................................15GasPiping-PGSeriesOnly ...................................15

LeakCheck ..........................................................15HighAltitudeApplication ......................................16ConvertingtoLPGas ...........................................16

OilPiping-POSeriesOnly .....................................17FuelLineHook-up:SingleLineSystem ...............17FuelLineHook-up:TwoLineSystem ...................17Hook-upProcedure ..............................................17EliminatingAirLeaks ...........................................17FuelOilType ........................................................17

electrical Connections .............................................18Pre-ElectricalChecklist ...........................................18LineVoltage .............................................................18WiringConnections .................................................18Grounding................................................................18ThermostatConnections .........................................19

HeatAnticipator ...................................................19Blower Speed ..........................................................19

ConstantBlowerOperation ..................................19

Startup&Adjustments ............................................20Important Safety Information ...................................20Pre-StartChecklist ..................................................20RefrigerantCharging ...............................................20OperatingInstructions-PGDirectIgnition ..............20

ShuttingOfftheGasSupply ................................20CheckingtheInputoftheFurnace .......................21CheckingtheInletGasLinePressure ..................21CheckingtheManifoldPressure ..........................21AdjustingtheManifoldPressure ..........................21Installing the Pressure Gauge ..............................21AdjustingtheBurner ............................................21

OperatingInstructions-POOilBurners ..................22Start-upProcedure...............................................22AirBleed-SinglePipeInstallation .........................22OilBurnerShutdownProcedure ..........................22FlameAdjustment ................................................22Electrode Setting ..................................................22Switching from Interrupted to IntermittentIgnitionControl .....................................................22

FiringRateConversion ............................................23

OperatingSequence .................................................23PGGasFurnaces ...................................................23POOilFurnaces ......................................................23

Troubleshooting ........................................................24PGDirectIgnition-GasGun...................................24POOilFurnace .......................................................25ControlModuleStatusIndicator ..............................26

ComponentFunctions .............................................26

Unit Maintenance ......................................................27

Figures&Tables ....................................................... 28Figure18.CMF2PhysicalDimensions ................ 28Figure19.CMF2WiringDiagram ......................... 29Figure20.FurnaceComponentLocation ............. 30

Installation/PerformanceChecklist ....................... 32

3

iMPortAnt sAFetY inForMAtionINSTALLER:Pleasereadallinstructionsbeforeservicingthis equipment. Pay attention to all safety warnings and any other special notes highlighted in the manual. Safety markings are used frequently throughout this manual to designate a degree or level of seriousness and should not be ignored. WArninG indicates a potentially hazardous situation that if not avoided, could result in personal injury or death. CAUtion indicates a potentially hazardous situation that if not avoided, may result in minor or moderate injury or property damage.

WArninG:eleCtriCAl sHoCK, Fire or eXPlosion HAZArD

Failuretofollowsafetywarningsexactlycouldresultinseriousinjuryorpropertydamage.

Improper servicing could result in dangerousoperation, serious injury, death or propertydamage.

• Before servicing, disconnect all electricalpowertoairhandler.

• Whenservicingcontrols,labelallwirespriortodisconnecting.Reconnectwirescorrectly.

• Verifyproperoperationafterservicing.

WArninG:Donotusethisapplianceifanyparthasbeensubmerged under water. Immediately call aqualified service technician to inspect theapplianceandtoreplaceanypartofthecontrolsystem and any gas control that has beensubmergedunderwater.

PROPOSITION 65 WARNING: This productcontains chemicals known to the state ofCaliforniatocausecancer,birthdefectsorotherreproductiveharm.

WArninG:

reqUireMents & CoDes

WArninG:Thisunitmustbeinstalledinaccordancewithinstructions outlined in this manual duringthe installation, service, and operation ofthis unit. Unqualified individuals should notattempt to interpret these instructions orinstallthisequipment.Failuretofollowsafetyrecommendations could result in possibledamage to the equipment, serious personalinjuryordeath.

• Allmanufacturedandresidentialhousinginstallationsmust be installed in accordance with these instructions, all applicable local building codes and the current revisionoftheNationalFuelGasCode(ANSIZ223.1/NFPA54),InstallationofOilBurningEquipment(ANSI/NFPA31) or the National Electric Code (ANSI/NFPA70), the Manufactured Home Construction & SafetyStandard,Title24CFR,Part3280,orwhenthisstandardisnotapplicable,theStandardforManufacturedHomeInstallationManufacturedHomeSites,CommunitiesandSetups(ANSI225.1).ResidentialinstallationsmustalsoconformtothestandardforChimey’s,Fireplaces,Vents,&SolidFuelBurningAppliances(NFPA211).

• Useonlywithtypeofgasoroilapprovedforthisfurnace.Refer to the furnace rating plate.

• Install this furnaceonly ina locationandpositionasspecified on page 4.

• Provideadequatecombustionandventilationairtothefurnacespaceasspecifiedonpages5-8.

• ProvideadequateclearancesaroundtheventairintaketerminalasspecifiedinFigure1(page8).

• Combustion products must be discharged outdoors.Connectthisfurnacetoanapprovedventsystemonly,asspecifiedonpages7-8.

• Never test for gas leaks with an open flame. Use acommercially available soap solution to check all connections.Seepages15-16.

• Thisfurnaceisdesignedtooperatewithamaximumexternal pressure rise of 0.5 inches of water column. ConsultTable6(page19),andtheratingplatefortheproper circulatingair flowand temperature rise. It isimportant that the duct system be designed to provide thecorrectflowratesandexternalpressure rise.Animproperly designed duct system can result in nuisance shutdowns, and comfort or noise issues.

• Whensupplyductscarryaircirculatedbythefurnaceto areas outside the space containing the furnace, the returnairshallalsobehandledbyduct(s)sealed tothe furnace casing and terminating in the conditioned space.Seepages9-10.

• Thisfurnacemaynotbeusedfortemporaryheatingofbuildings or structures under construction.

4

• The Commonwealth of Massachusetts requirescompliancewithregulation248CMR4.00and5.00forinstallation of through – the – wall vented gas appliances asfollows:

1. Fordirect-ventappliances,mechanical-ventheatingappliances or domestic hot water equipment, where the bottom of the vent terminal and the air intake is installed below four feet above grade the following requirementsmustbesatisfied:

a.)Acarbonmonoxide(CO)detectorandalarmshallbeplacedoneachfloorlevelwheretherearebedrooms.The detector shall complywithNFPA720 (2005Edition)andbemountedinthelivingareaoutsidethebedroom(s).

b.)A(CO)detectorshallbelocatedintheroomthathousestheapplianceorequipmentandshall:• Bepoweredbythesameelectricalcircuitasthe

applianceorequipment.Onlyoneserviceswitchshallpowertheapplianceandthe(CO)detector;

• Havebatteryback-uppower;• MeetANSI/UL2034Standardsandcomplywith

NFPA720(2005Edition);andApprovedandlistedby a Nationally Recognized Testing Laboratory as recognizedunder527CMR.

c.)AProduct-approvedvent terminalmustbeused,andifapplicable,aproduct-approvedairintakemustbe used. Installation shall be in strict compliance with the manufacturer’s instructions. A copy ofthe installation instructions shall remain with the appliance or equipment at the completion of the installation.

d.)Ametalorplasticidentificationplateshallbemountedat the exterior of the building, four feet directly above the location of vent terminal. The plate shall be of sufficient size, easily read from a distance of eight feetaway,andread“GasVentDirectlyBelow”.

2. Fordirect-ventappliances,mechanical-ventheatingappliances or domestic hot water equipment where the bottom of the vent terminal and the air intake is installed above four feet above grade the following requirementsmustbesatisfied:

a.)A(CO)detectorandalarmshallbeplacedoneachfloorlevelwheretherearebedrooms.ThedetectorshallcomplywithNFPA720(2005Edition)andbemountedinthelivingareaoutsidethebedroom(s).

b.)The(CO)detectorshall:• Belocatedintheroomthathousestheappliance

orequipment;• Behard-wiredorbatterypoweredorboth.• ShallcomplywithNFPA720(2005Edition).

c.)Aproduct-approvedventterminalmustbeused,andifapplicable,aproduct-approvedairintakemustbeused. Installation shall be in strict compliance with the manufacturer’sinstructions.Acopyoftheinstallationinstructions shall remain with the appliance or equipment at the completion of the installation.

MinimumInstallationClearances• Accessforpositioningandservicingtheunitmustbe

considered when locating unit. The need to provide clearance for access to panels or doors may require clearance distances over and above the requirements.

• This appliance must be installed in accordance withclearances listed in Table 1. The furnace must be installed with ample clearance for easy access to the air filter, blower assembly, burner assembly, controls, and vent connections.

• Locateandinstallthisunitinpositionasspecifiedonpages10&11.Thisunit isdesignedonly for Indoorinstallations and should be located with consideration of minimizing the length of the supply and return ducts.

Table1.MinimumClearanceRequirements

instAllAtion CleArAnCesCloset AlCove

Front* 6" 18"Rear 0" 0"Sides 0" 0"Top 17" 17"Duct w/in 3ft of furnace 1/4" 1/4"Vent 6” 6”Plenum 1" 1"Roof Jack Barrel 0” 0”

†notes:* ServiceClearance

AlcoveInstallations-Allow18in.minimumclearancefrom front of unit to nearest wall or partition for servicing.

Closetinstallations-Requireareturnairgrillinstalledinthedooror a partially louvered door across the opening for proper air circulation.Forclearances6”orgreater,theclosetmusthaveanopen free area of 235 in2minimum.Forspecialclearancesbetween1”-5”,requirementsarealouvereddoorwithaminimumof250in2(1613cm2)freearea.Afully louveredclosetdoorisstronglyrecommended for both installation types.

LEFTSIDE

FRONT

RIGHTSIDE

REAR

VENT

5

The information listed below is for reference purposes only and does not necessarily have jurisdiction over local or state codes.Alwaysconsultwithlocalauthoritiesbeforeinstallingany gas appliance.

DuctSystems• USandCANADA:AirConditioningContractorsAssociation

(ACCA) Manual D, Sheet Metal and Air ConditioningContractorsNationalAssociation(SMACNA),orAmericanSocietyofHeating,Refrigeration,andAirConditioningEngineers(ASHRAE)FundamentalsHandbook

electrical Connections• US:NationalElectricalCode(NEC)ANSI/NFPA70• CANADA:CanadianElectricalCodeCSAC22.1

General installation• US:CurrenteditionoftheNFGCandtheNFPA90B.For

copies,contacttheNationalFireProtectionAssociationInc.,BatterymarchPark,Quincy,MA02269;orAmericanGasAssociation,400N.Capitol,N.W.,WashingtonDC20001orwww.NFPA.org

• CANADA:NSCNGPIC.Foracopy,contactStandardSales,CSA International, 178 Rexdale Boulevard, Etobicoke(Toronto),Ontario,M9W1R3Canada

Safety• US: (NFGC) NFPA 54–1999/ANSI Z223.1 and the

Installation Standards, Warm Air Heating and AirConditioningSystemsANSI/NFPA90B.

• CANADA: CAN/CGA-B149.1 and .2–M00 NationalStandardofCanada.(NSCNGPIC)

• Sufficientclearanceforunobstructedairflowthroughalouvered door must be maintained in order to achieve ratedperformance.Airreturntothefurnacemusthavetheminimumrequiredtotalfreearea:

200 in2(1290cm2)forfurnaceonly.Mayalsoincludereturn air grille and frame assembly P/N 902989 or wall mount grille P/N902999).

235 in2(1516cm2)with4tonA.C.orH.P.installed. 250 in2.(1613cm2)with4tonA.C.orH.P.installed&

1”specialclearance. 390 in2(2516cm2)withupto5tonA.C.orH.P.installed.

CoMbUstion Air & ventinG reqUireMents

CArbon MonoXiDe PoisoninG HAZArD

Failure to follow the steps outlined belowforeachapplianceconnectedtotheventingsystem being placed into operation couldresultincarbonmonoxidepoisoningordeath.

The following steps shall be followed witheachindividualapplianceconnectedtotheventing system being placed in operation,whileallotherappliancesconnectedtotheventingsystemarenotinoperation:

1. Seal any unused openings in the ventingsystem.

2. Inspecttheventingsystemforpropersizeandhorizontalpitch,asrequiredintheNationalFuel Gas Code, ANSI Z223.1/NFPA 54 orthe CSA B149.1, Natural Gas and PropaneInstallation Codes and these instructions.Determine that there is no blockage orrestriction, leakage, corrosion and otherdeficiencies which could cause an unsafecondition.

3. Asfaraspractical,closeallbuildingdoorsandwindowsandalldoorsbetweenthespaceinwhich theappliance(s) connected to theventingsystemarelocatedandotherspacesofthebuilding.

4. Closefireplacedampers.5. Turnonclothesdryersandanyappliancenot

connected to the venting system. Turn onanyexhaustfans,suchasrangehoodsandbathroomexhausts,sotheyareoperatingatmaximumspeed.Donotoperateasummerexhaustfan.

6. Follow the lighting instructions. Place theappliance being inspected into operation.Adjust the thermostat so appliance isoperatingcontinuously.

7. Test for spillage from draft hood equippedappliancesat thedrafthood reliefopeningafter5minutesofmainburneroperation.Usetheflameofamatchorcandle.

8. Ifimproperventingisobservedduringanyoftheabovetests,theventingsystemmustbecorrectedinaccordancewiththeNationalFuelGasCode,ANSIZ223.1/NFPA54and/orCSAB149.1,NaturalGasandPropaneInstallationCodes.

9. After it has been determined that eachapplianceconnectedto theventingsystemproperlyventswhentestedasoutlinedabove,returndoors,windows,exhaustfans,fireplacedampers and any other gas-fired burningappliancetotheirpreviousconditionsofuse.

WArninG:

6

GeneralInformation

WArninG:Thisfurnacemustbeinstalledbyaqualifiedinstalling agency and in accordance withapplicable local codes and ordinances thatgovernthistypeofequipment.Failuretoproperlyinstallthefurnace,baseassembly,andventingsystemasdescribedhereinmaydamagetheequipmentand/orthehome,cancreateafireor asphyxiation hazard, violates U.S. listingrequirements,andwillvoidthewarranty.ThisfurnaceisNOTapprovedforinstallationwithsplitsystemairconditioning.UseaNORDYNEpackagedairconditioningsystem.

• Instructionsfordeterminingtheadequacyofcombustionair for an installation can be found in the current revision oftheNFGC(ANSIZ223.1/NFPA54).Consult local codesforspecialrequirements. These requirements areforUSinstallationsasfoundintheNFGC.

• TherequirementsinCanada(B149.1)arestructureddifferently.ConsultwithB149.1andlocalcodeofficialsforCanadianinstallations.

Dependingonthetypeofinstallation(SeeTable1),theCMF2Seriesfurnacecandrawcombustionairfromoutsidethehome(directvent)orfromthespacebeingconditioned.These high quality, direct vent furnaces are used for manufactured housing, recreational vehicle, and residential applications. They are certified to the UL307 standards (UL307-Aforoilmodels;UL307-Bforgasmodels),andcan be installed in a variety of applications, as shown in Table 2.

TheCMF2furnaceisavailableinpowergas(PGmodels)orpoweroil(POmodels)andcanbeconvertedfrompoweroil to power gas, and vice versa. The power gas models are designed for operation with either natural or propane

CombustionAirQuality

CAUtion:Combustion air must not be drawn from acorrosiveatmosphere.

Provisions for adequate combustion air and ventilation air mustbeinaccordancewiththeANSIZ223.1/NFPA54,(NationalFuelGasCode),ANSI/NFPA31(InstallationofOilBurningEquipment),andallapplicablelocalcodes.

The installation of the furnace must allow for adequate supplyoffreshair forcombustion.Airopeningsontopof the furnace and openings in closet doors or walls must never be restricted. The combustion air opening of the furnace must be designed and located to prevent blockage by snow.

If the furnace is operated without adequate air for combustion,theflameroll-outswitchwillopenandshutoff the gas supply to the burners. note:Thissafetydevice

(LP) gas. The firing rate of the CMF2 80 ConvertibleSeriescanbefield-installedusingacertifiedNORDYNEconversion kit by a qualified service technician. Refer to page 6 for conversion information.

CAUtion:Exhaust fans, clothes dryers, fireplaces andotherappliancesthatforceairfromthehousetotheoutdoorscancreateanegativepressureinsidethehouse,resultinginimproperfurnaceoperationorunsafeconditionssuchasflamerollout.Itisimperativethatsufficientairexchangewith the outdoors is provided to preventdepressurization.AdditionalinformationabouthowtotestfornegativepressureproblemscanbefoundintheNFGC.

tYPe oFinstAllAtion

FUrnACebAse

tYPe oFeXHAUst

DUCteDAPPliCAtion

DireCt ventsYsteM reqUireD

ManufacturedHousingorRecreationalVehicle

MA-100orMA-200Universal Base

NORDYNESRJRoofjackOnly

Yes Yes

Residential†MA-100orMA-200

Universal BaseNORDYNESRJRoofjackoranExistingChimney*

Yes Yes

Residential† CB-200ACottageBaseNORDYNESRJRoofjackoranExistingChimney*

Yes Yes

Residential† CB-200ACottageBaseNORDYNESRJRoofjackoranExistingChimney*

No No

†Residentialisdefinedasasingle-storynon-manufacturedhousinginstallation.

*ConsulttheVentingRequirementssection(page#)formoredetailsonproperlyventingthisappliancethroughanexistingchimney.

Table2.CMF2InstallationTypes

7

isamanuallyresetswitch.DONOTinstalljumperwiresacross these switches to defeat their function or reset a switch without identifying and correcting the fault condition. If a switch must be replaced, use only the correct sized part specified in the Replacement Parts List provided online.

The combustion air from the outside needs to be clear of chemicals that can cause corrosion. Excessive exposure to contaminated combustion air will result in safety and performance related problems. The list below are examples of chemical contaminants found in a wide variety of some commoncommercialandhouseholdproducts:

Permanent wave solutionsChlorinatedwaxesandcleanersChlorinebasedswimmingpoolchemicalsWater softening chemicalsDe-icingsaltsorchemicalsCarbonTetrachlorideCleaningsolvents(perchloroethylene)Printing inks, paint removers, varnishes, etc.HydrochloricAcidCementsandgluesAntistaticfabricsoftenersMasonryacidwashingmaterials

When drawing combustion air from underneath the home, a vent or duct of at least 18 in2 of free area should be installed outside and completely unobstructed. When using the combustion air duct, make sure it extends through thefloor.Whenusingthedirectventkit,thecombustionair opening must be located in the same pressure zone astheflueexitoftheroofjackorchimney.Refertotheinstructions provided with the kit for more information.

Direct vent FurnacesDirectVent furnacesdrawcombustionairdirectly fromthe outdoors and then vent the combustion products back outside, isolating the entire system from the indoor space. It is important to make sure that the whole system is sealed and clearances to combustibles are maintained regardless of the installation being in a confined or unconfined space.

Fordirectventapplications,eitherthecombustionairductprovidedwiththeMASeriesbasekitorthedirectventkitcan be used. The direct vent kit must be ordered separately. OnlyforaspecialCB-200AcottagebaseinstallationcantheCMF2drawthecombustionairfromtheconditionedspace.TheCB-200Acottagebasekitmustbeorderedseparately. Refer to the replacement parts listing provided with the furnace to order the direct vent kit or the cottage basekit.Followtheinstructionsprovidedwiththekitsforproper installation.

When unsure about combustion air supply availability, adirectventsystemshouldbeused.Forsmallrooms,confined spaces, tight construction or similar situations in which the combustion air requirements of the furnace might not be met, a direct vent system must be used.

ManufacturedHousingInstallationsFor all manufactured housing applications, the CMF2furnace must be vented using the SRJ series roofjack. The instructions for selecting the proper roofjack for your installation are detailed later in these instructions.

Residential Installations

WArninG:This furnace must never be connected to achimney flue serving a separate appliancedesignedtoburnsolidfuel.

For residential applications (See Table 2), the CMF2furnace may be vented through the SRJ series roofjack or through an existing chimney. Figure 10 (page 14)displays instructions for selecting the proper roofjack for your installation. If venting through an existing chimney, the venting system must be in accordance with these instructions, all applicable local building codes, the National FuelGasCode(ANSIZ223.1/NFPA54),theInstallationofOil-BurningEquipmentstandard(ANSI/NFPA31),andthestandardforChimneys,Fireplaces,Vents,andSolidFuel-BurningAppliances(NFPA211).

WArninG:When venting through a chimney, check thechimney for soot, leaks, obstructions, andproper installation.

The materials used to construct the venting system must be capable of withstanding exposure to temperatures of at least 700° F.The existing chimney servicing thisfurnace must be vertical. Horizontal distances to anexisting chimney must be as short as possible, and the connecting pipe must slope upward to the chimney at not less than a 45° angle. The total length of the sloping pipe must not exceed 6 ft. The venting system must have no obstructions or sharp bends where soot and other foreign matter can accumulate.

If an inspection determines that the chimney is obstructed, thechimneymustbecleanedandtheconnectingfluepipemust be cleaned or replaced.

If venting a CMF2 power oil furnace into an existingchimney, a barometric damper can be installed at the vent connection of the furnace to regulate the draft. The barometric damper must be properly installed per the manufacturer’s instructions. Refer to all applicable codes to determine whether or not a barometric damper can be used for your CMF2 power oil furnace installation.The barometric damper used must be installed such that air from the conditioned space can only enter the fluepassageway.Donotuseadoubleactingbarometric

8

damper.Allfluepipejointsshouldbefastenedwithsheetmetal screws for rigidity.

The chimney height, required draft, and number of appliances served by the chimney must be in accordance with all applicable codes. To prevent down draft, the chimney should extend at least 2 feet above the peak of theroof.SeeFigure1.

Itisrecommendedthatthefurnaceflueservenootherappliances. When the chimney serves only the furnace, the flueareamustbesizedaccordingtoallapplicablecodes.Theminimuminternalareaofthefluemustbeequaltoatleasttheareaofthefurnaceflueexit. When two or more appliancesmustventthroughacommonflue,theareaofthecommonflueshouldbesizedinaccordancewithall applicable codes.

When an existing furnace is removed or replaced in a venting system, the venting system may not be properly sized to vent the attached appliances. The venting system must be checked to ensure proper venting. Improperly sized venting systems can result in the formation of condensate, leakage, spillage, etc. Refer to the National Fuel GasCode (ANSI Z223.1/NFPA 54), and the Installation ofOil Burning Equipment standard (ANSI/NFPA 31) forcorrecting improper venting systems.

VentingThroughaChimneyWhenventingtheCMF2throughanexistingchimney,thematerials, sizing, and installation of the chimney must be inaccordancewiththeANSIZ223.1/NFPA54,(NationalFuelGasCode),ANSI/NFPA31(InstallationofOilBurningEquipment),NFPA211(Chimneys,Fireplaces,Vents,andSolidFuel-BurningAppliances)andallapplicablelocalcodes. The materials used must be capable of withstanding exposuretotemperaturesofatleast700°F.TheCMF2powergasunitsarefan-assisted.

VentilaireIIIorIVAirQualityPackage(Accessory)

CAUtion:MAintAin 2 1/2” MiniMUM CleArAnCe betWeen FlUe PiPe AnD FleX DUCt. FAilUre to CoMPlY WitH tHis restriCtion CoUlD CAUse eqUiPMent DAMAGe. ventilAire iii illUstrAteD otHer listeD vAriAtions AvAilAble. CHeCK WitH MAnUFACtUrer.

TheVentilaireairqualitypackagesareavailabletomeettheventilationrequirementsasoutlinedinH.U.D.StandardPart3280.103(b)(2).Thesepackagesintroduceoutdoorair into the living space during furnace blower operation. TheVentilAireIValsoservestoexhaustmoistand/orhotairfromtheatticspace.SeeFigure2fortypicalinstallation.Completeinstallationinstructionsaresuppliedwitheachair quality package.

VENT PIPE

3 FEET MIN.

ROOF JACK ASSY.

ROOF CAP ASSY.

FLEX DUCT

CEILING TRIM COLLAR

CONNECTORDRAW BAND

DRAW BAND

FURNACE

Figure1.TypicalInstallation

VentilAireIII

VentilAireIV

Figure 2. ventilAire iii & iv

9

CirCUlAtinG Air reqUireMents

WArninG:Allsupplyductsmustbesecuredtothefurnacewithsheetmetalscrewsandadequatelysealed.Whensupplyairisprovidedthroughthebottomoftheunit,thejointbetweenthefurnaceandtheplenummustbeairtight.

Thesurfacethatthefurnaceismountedonmustprovidesoundphysicalsupportofthefurnacewithnogaps,cracksorsaggingbetweenthefurnaceandthefloororplatform.

Supply air ducts must not be connected toany other heat producing device such as afireplaceinsert,stove,etc.Thismayresultinfire, explosion, carbon monoxide poisoning,personalinjury,orpropertydamage.

Plenums&AirDuctsThis unit is designed only for use with a bottom return supply duct and must be installed in accordance with thestandardsoftheNationalFireProtectionAssociationStandard for Installation of Air Conditioning Systems(NFPA90A),StandardforInstallationofResidenceTypeWarmAirHeatingandAirConditioningSystems(NFPA90B),andallapplicablelocalcodes.NFPApublicationsare available by writing to: National Fire ProtectionAssociation,BatterymarchPark,Quincy,ME02269orvisit www.NFPA.orgontheweb.

• DesigntheairductsaccordingtomethodsdescribedbytheAirConditioningContractorsofAmerica(ACCA).

• Airductsmustbealuminum,tinplate,galvanizedsheetsteel, or other approved materials for outlet or return air ducts. Snap-Lock or Pittsburgh-Lock seams arepreferred.Allothertypesofseamsmustbemadetightto prevent leakage.

• It is goodpractice to seal all connectionsand jointswith industrial grade sealing tape or liquid sealant. Requirements for sealing ducts vary from region to region.Consultwithlocalcodesforrequirementsspecificto your area.

• Gaspipingmustnotruninorthroughanyoftheairductsystem.

SupplyAirConnections• The supply duct system must be designed so that the

static pressure measured external to the furnace does not exceed the listed static pressure shown on the furnace rating plate. The supply air must be delivered totheheatedspacebyduct(s)securedtothefurnacecasing, running full length and without interruption.

• Ductsystemmustbedesignedsothatnosupplyregistersare located in duct system directly below the furnace.

DampersAnautomatedshutoffdamperisrequiredwhenthehomeis air conditioned by a self-contained unit. A damperis required to prevent chilled air from flowing over thefurnace heat exchanger. This damper is designed to fit inthefeederductcavity,directlyunderthefurnace.Forproper installation, refer to the instructions provided with the damper. See replacement parts list provided online.

UnconditionedSpacesAllductworkpassingthroughunconditionedspacemustbe properly insulated to minimize duct losses and prevent condensation. Use insulation with an outer vapor barrier. Refer to local codes for insulation material requirements

Closet installations

WArninG:Failure to comply with the the followinginstructionsmayresultinfire,asphyxiationorcarbonmonoxidepoisoning.

For proper air circulation, closet installations requirea return air grill installed in the door or side wall that exchanges with the living area of the home as shown in Figure3(page10).Apartiallylouvereddoormayalsobeused across the opening. Return air openings should not be located to draw air directly from a bathroom. Grilles placedinasidewallrequirea6”clearancefromthewallto the furnace so that the air may enter the front grille of the furnace. In addition, all return air systems, including thefloorandceilingsystems,mustmeet the followingconditions:• Thereturnairopening,regardlessofitslocationinthe

closet, must not be smaller than size specified on unit datalabel.Iflocatedinthefloor,theopeningmustbeprovided with a means of preventing its inadvertent closurebyflatobject(s)placedovertheopening.

• Thereturn-airopeningintothecloset,regardlessofitslocation, must have an open free area of 200 in2(1290cm2)minimum.

• Thecross-sectionalareaofthereturnductsystem(infloororceiling)leadingintotheclosetmustnotbelessthan 200 in2(1290cm2).

• Thetotalfreeareaoftheopeningsinthefloorortheceiling registers serving the return air duct system must not be not less than 300 in2(1935cm2).

• Materialslocatedinthereturnductsystemshallhaveaflamespreadclassificationof200orless.

• Noncombustiblepanshavingoneinchupturnedflangesare located beneath openings in a floor return ductsystem.

• Hollow spaces used as ducts or plenums forenvironmentalairmaycontainmineral-insulatedmetalsheathed cable, aluminum sheathed cable, electrical metallic tubing, rigid metal conduit, flexible metalconduit(nottoexceed4ft),ormetal-cladcables.Wiring

10

materials, fixtures, are to be suitable for the expected ambient temperatures to which they will be subjected.

• Thenegativepressureintheclosetmustnotbelessthanminus 0.05 inches water column with the closet door closedandthefanoperatingathighspeed.Areadingbelowminus0.05”indicatesadirtyfilterorarestrictedreturn air system.

• For floor return systems, the manufactured housingmanufacturer or installer shall affix a prominent marking on or near the appliance where it is easily read when the closet door is open. The marking shall read:“CAUTION,HAZARDOFASPHYXIATION.DONOTCOVERORRESTRICTFLOORRETURNAIROPENING.”orequivalent.note: This label is supplied with the instruction manual in each furnace.

• Forclosetinstallationwithlessthan6”frontclearance,but not less than 1”, a louvered door must be usedhaving a minimum 200 in2(1290cm2)freeareaopeningdirectlyinlinewithopeningsinthefurnacedoor.Afullylouvered door having the minimum free area is also permittedifthefronttoleranceisnotlessthan4”.Adjustduct registers to obtain a temperature rise within the range specified on the furnace nameplate.

Furnace Filter

WArninG:Never operate the furnace without a filter inplace.Accumulatingdustinthereturnaircanbuild up on internal components, resultinginlossofefficiency,equipmentdamage,andpossiblefire.

• CMF2furnacesaresuppliedwithasingleairfilterwhenshipped from the factory. Accessingthefilterdoesnotrequire tools and can be easily removed from the inside of the access door. The filter is secured to the door with

FUrnACe instAllAtionnote: Since all installations are different, the sequence of these steps may differ from the actual installation. These installation procedures are suggested for typical furnace installations. OnlyqualifiedHVACtechniciansshouldinstallthisfurnace.

GeneralInformationTheCMF2furnaceisdesignedonlyforindoorinstallationsand can be readily connected to the high static duct system of a home. Units are approved for single/multistory residential or mobile/modular/manufactured structures in freestanding/closet/alcovedownflowonlyconfigurations.

This appliance will provide many years of safe and dependable comfort, providing it is properly installed andmaintained.Abuse,improperuse,and/orimpropermaintenance can shorten the life of the appliance and create unsafe hazards. Please read all instructions before installing the unit.

Approved installation, operation, and maintenance ofthis appliance must be in accordance with the listed specifications contained in these instructions and other documents supplied with the furnace and/or optional air conditioning equipment. Unless it is noted differently in this manual, only use factory authorized kits and accessories when modifying this appliance. Refer to local authorities having jurisdiction for further information.

BeforeYouInstallthisFurnace√ This equipment is securely packaged at the time of

shipment and upon arrival should be carefully inspected for damage prior to installing the equipment at the job site.Claimsfordamage(apparentorconcealed)shouldbe filed immediately with the carrier.

√Checktheelectricalsupplyandverifythepowersupplyis adequate for unit operation. The system must be wired and provided with circuit protection in accordance with local building codes. If there is any question concerning the power supply, contact the local power company.

√Verify the air delivery of the furnace is adequate tohandle the static pressure drop of the coil, filter, and duct work.

LocatingtheUnit• Surveythejobsitetodeterminethebestlocationfor

installing the unit. Consideration should be given toavailability of electric power, service access, and noise.

Figure 3. Closet installation

a retaining bracket. It is recommended that the filter be cleaned or replaced monthly. Newly built or recently renovated homes may require more frequent changing until the construction dust has minimized.

• Replacement filters are available at most local retailers. Inspect filters frequently and replace when necessary with filter of same dimensional size. Filtersdesignedtoremove smaller particles such as pollen, may require additional maintenance.

11

Figure 4. MA-200 base Pan

FRONTCombustion Air

Knock-outs(7-1/4” X 2-1/4”)

Feeder Duct Opening

FlueLocation

24 1/8

8 3/8

12 1/8

12 1/8

9 1/818 1/4

MA-200 base installationTheMA-200baseisdesignedforO.E.M.andreplacementinstallationoftheCMF2seriesfurnace.Thewarmairductsystem should be designed so the duct static pressure external to the furnace does not exceed the static pressure listed on the furnace data label. Floorcut-outsmustbecarefully located to avoid misalignment of the furnace and air duct.

1. Usingthebasepan(Figure4)asaguide,locateandmark the121/8” x121/8”opening for theFeederDuct. note: If using the combustion air duct, knock outtheductopeningtobeusedandmarkthe2-1/4”x7-1/4”openingontheflooralso.

2. Cutall4sidesoftheFeederDuctopening1”largerthan the drawn cutout. note:Cuttingtheopeningto14-1/8”x14-1/8”willallowtheflangesontheundersideof the base pan to fit in the opening. Cutallthewaythrough the insulation and bottom board so that the combustion air duct is unobstructed to outside air.

3. Ifapplicable,cutthe21/4”x71/4”openingforthecombustion air duct. note:Cuttheopeningfortheductabout1/8”largerthantheactualcutoutdrawn.This will allow some clearance when installing the FeederDuct.

4. Drilla1”diameterholeforthefuellinethroughthefloorandbottomboard to theoutside.note:Fuellines are not supplied with the furnace. They should be installed to comply with all applicable codes.

5. Droptransitionduct(Figure5)upsidedownthroughtheflooropeningandcenterthetopofthefeederductin14-1/8”x14-1/8”flooropening.Usingthefeederductasaguide,markandcuta12”x12”openinginthe supply duct.

6. Insert the feeder tabs into the main duct and bend them over tightly so that the main duct edges are trapped betweenflangesandtabs.note:Metaltapemaybebe used to ensure an air tight connection.

7. Install the base pan around the feeder duct. Secure with 2 screws in the holes near the rear of the base pan.

8. Slit the corners of the feeder duct down to the top of thebasepan(Figure6).Whilethetopofthedistributionduct is pulled up with one hand, bend down each side of the feeder duct tightly to the base with the other hand.Trimthemetaltoallowaoneinchflangeoverthetopofthebasepanandsealthatflangewithmetaltape.

• Thedimensionsof the roomoralcovemustbeableto accommodate the overall size of the unit and the installation clearances inTable 1 (page 4). Physicaldimensions for this furnace are shown in Figure 18(page29).

• Theunitmustbeleveledatinstallationandattachedtoa properly installed duct system.

• Thesurfacethatthefurnaceismountedonmustprovidesound physical support of the unit.

Figure 5. transition Duct

Heater Duct Below Joists

Flange

BendOver Tabs

Base

FloorJoists

Slit 4 CornersBend Down 4 Sides

TRANSITIONDUCT

Figure6.FeederDuctInstallation

Heat Duct Below Joists

Base Feeder Duct

FloorJoists

Cut This Line

Bend OverAlong This Line

1"

12

note:Ifusinga“V”or“U”-boxcrossoversystem,usemanufacturers instructions for installation details.

InstallingtheFurnaceonanMA-200Base1. Carefullyliftthefurnaceoverthebasepanandset

intoposition.Theflangeonthebackofthefurnaceshould rest on the inside rails of the base.

2. Raise the front of the furnace to clear the gasket on the bottom of the furnace and slide the back until therearflangedropsintothechannelattherearofthe base. note: Do not damage the combustion air adapter, ifpresent,whilepositioningtheunit.Makesurethefurnaceengagesthetabsontherearflangeof the base.

3. Open the access door and fasten the front of thefurnaceandthebasetothefloorwith#8x1/2”sheetmetal screws.

4. Using theprovidedhoseclamp,secure theflexiblecombustion air tubing from the burner to the combustion air adapter.

MA-100UniversalBaseInstallationTheMA-100baseisdesignedprimarilyforreplacementinstallation of the CMF2 series furnace where themanufactured home duct system may be too small or restrictiveforproperairflow.TheMA-100baseprovidesapproximately 4 inches of additional plenum space before thedischargeairenterstheductsystem.SeeFigure7.1. Using the universal base as a guide, locate and mark

the 12-1/8” x 12-1/8” opening for the Feeder Duct.note: If using the combustion air duct, knock out theductopeningtobeused.Thenmarkthe2-1/4”x7-1/4”openingonthefloor.

2. Cutall4sidesoftheFeederDuctopening1”largerthan the drawn cutout. note:Cutting theopeningto14-1/8”x14-1/8”willallowthefourflangesontheundersideofthepaneltofitintotheopening.Cutallthe way through the insulation and bottom board so that the combustion air duct is unobstructed to outside air.

3. Ifapplicable,cutthe21/4”x71/4”openingforthecombustion air duct. note:Cuttheopeningfortheductabout1/8”largerthantheactualcutoutdrawn.This will allow some clearance when installing the FeederDuct.

4. Drilla1”diameterholeforthefuellinethroughthefloorandbottomboard to theoutside.note:Fuellines are not supplied with the furnace. They should be installed to comply with all applicable codes.

5. Set the universal base in place. Drop transition duct (Figure5)upsidedownthroughtheflooropeningandcenterthetopofthefeederductin14-1/8”x14-1/8”flooropening.

6. Usingthefeederductasaguide,markandcuta12”x12”openinginthesupplyduct.Removethebaseandtransitionfeederduct;thencuttheopeningintothe distribution duct.

7. Insert the feeder tabs into the main duct and bend them over until the main duct edges are trapped tightly betweenflangesandtabs.note:Metaltapemaybeused to ensure an air tight connection.

8. Set the bottom base panel over the feeder duct. Slit the corners of the feeder duct down to the top of the base. While the top of the distribution duct is pulled up with one hand, bend down each side of the feeder duct tightly to the base with the other hand. Trim the metaltoallowoneinchflangeoverthetopofthebaseandsealthatflangewithmetaltape.

9. Securethetoppaneltothefloorwith2screwsthroughthe front flange. note: If using a “V” or “U”-boxcrossover system, use manufacturers instructions for installation details.

InstallingtheFurnaceonanMA-100Base1. Carefullyliftthefurnaceovertheuniversalbasepan

andsetintoposition.Avoiddamagingthefeederductassembly and combustion air adapter, if present. note: Makesurethefurnaceispositionedagainstthe back end of the base.

2. Openthefurnacedoorandfastenthefurnacetothebaseusing#8x1/2”sheetmetalscrews.

3. Using theprovidedhoseclamp,secure theflexiblecombustion air tubing from the burner to the combustion air adapter.

Figure7.MA-100UniversalBase,BottomPanel

12 1/8

Feeder DuctOpening

18 1/4

24 1/2

12 1/8

FRONTCombustion Air

Knock-outs(7-1/4” X 2-1/4”)

13

CombustionAirDuct/PipeInstallationTheCMF2furnacemustdrawthecombustionairfromoutside(exceptforspecialinstallations)andrequiresusingthe2”X7”rectangularcombustionairductprovidedintheMAseriesbasekitorthedirectventkit.SeeTable2(page6)forspecialcombustionairinstallations. note: If using the direct vent kit, the kit must be installed before the furnaceispositioningonthebase.Followtheinstructionsprovided with the kit. If using the rectangular combustion airduct,followthestepsbelow:

1. Install the combustion air duct through the selected knockoutinthebase.Fordirectventapplications,therearknock-outinthefurnacebasecannotbeused.

2. Installthecombustionairadapter(afterthecombustionairducthasbeenpositioned)totransitionthe2”X7”openingofthecombustionairducttothe2”diameteroftheburnerflexibletubing.note:AdapterisincludedintheMAseriesbasekits.Forretrofitapplicationsinwhich the MA series base is already installed, thecombustion air adapter can be ordered as a kit. Refer to the Replacement Parts List for more details on ordering this kit.

3. Securetheadapterwithwoodormetalfasteners(fieldsupplied),dependinguponyourinstallation.

note: Make sure the gasket for the adapter ispositioned properly before installing the adapter.

4. Attach the flexible hose from the burner to thecombustion air adapter using the provided hose clamp.

3. Insert the vent pipe into the bottom of the roof jack with locking slot pointed towards furnace. Slide the pipe into the roof jack to a length that allows convenient reach to the connection at the top of the furnace.

4. Ease the roof jack assembly through the openings. note: The lower portion of the outer barrel must extend through the finished ceiling as indicated on the barrel. Use sealant or caulking on the roof or adaptor tosealundertheflashingoftheroofjackassembly.

5. Extend the vent pipe until the locking slot engages the screwinthetopofthefurnacefluepipe.

6. Twist the vent pipe to lock the two pipes together and tightenthescrew.Alljointsandconnectionsshouldbeinspectedbeforestartupofthefurnace.SeeFigures10&11(page14).

7. Fastentheceilingtrim/firestopplatesaroundtheupperbarrelwithfournailsorwoodscrews(fieldsupplied).

note:ThetopsectionofroofjackmodelsSRJ-3,-4,and-5canberemovedfordwellingtransit.Ifthetopisremoved, remaining openings must be sealed from rain, debris,etc.,untilthetopisreinstalled.Aplasticaccessorycap must be fastened to the lower roof jack section using the same screws securing the roof jack cap assembly.

iMPortAnt: When the top section of the roof jack is removed for transit, a special warning label must be attached adjacent to the fuel line connection of the gas or oil burner. The special warning label is supplied with two piece roof jack assemblies.

SRJRoofJackInstallationRequired ceiling and roof cut-out openings must beaccurately located to prevent hazardous misalignment ofthefurnaceandroofjack.Figure8displaysatypicalinstallation for maufactured housing applications. Refer toFigure9(page14)todetermineappropriateSRJroofjack and accessories required for your installation. Install only SRJ series roof jack as specified on the furnace label. note: Aroofjackadaptorisrequiredforslopedroofs.

WArninG:• Theroofjackandventpipeasdeterminedfrom

thechartinFigure9mustbeapplied.• Theindicatinglinenearthebottomoftheroof

jackmustextendbelowthefinishedceiling.• Theventpipemustbeattachedtothefurnace

fluecollarwithprovidedsheetmetalscrews.• DONOTinstallanyelbows(adjustableornon-

adjustable)orastackdamperintheventingsystem.

1. Measureandcutan81/4”diameterholethroughtheroofandceilingthatisalsoindirectlinewiththeflueconnection on the top of the furnace.

2. Center theadaptoropeningover the roofopening.Use sealant or caulking under the adaptor. Use roofing nails or screws on wood construction or sheet metal screws on metal roofs.

Flashing

BarrelCeiling Plate

VentVentilationKnock-Out

DUCTCONNECTOR

Return AirGrille and Filter

Power SupplyConnection

AccessDoor

Base Pan

Fuel Line

Feeder Duct

CombustionAir Duct

FURNACEASSEMBLY

ROOF JACKASSEMBLY

Combustion AirAdapter (Not Shown)is to be InstalledOver CombustionAir Duct

Figure8.TypicalFurnaceInstallationforManufacturedHousingApplications

14

Figure 11. vent Pipe installation

vent PiPe

FlUe PiPeoF FUrnACe

tUrn to loCK-tiGHten sCreW

RA-S4

RA-S3

RA-S2.5

4/12

3/122-1/2/12

None Flat

NOTES:SRJ1 & SRJ2 Models are one piece constructionSRJ3, SRJ4, & SRJ5 Models are two piece construction-C Models are two piece construction

OPTIONAL:Add -C for Raised Inlet Models (Example: SRJ3-34-C)RoofJack Adaptor (for mounting roof jack on pitched roof)Protective Cap (used when top of roofjack is removed)

Use AdaptorModel No.

When roof pitch is:

1/2 MinimumFurnace

CMF Series

57"

And CeilingHeight is:

Add SuffixFor Vent Pipe

7'

-28

7'6"

-34

8'

-40

Ceiling Trim Plates

When CeilingCavity is:

Use Roof JackModel No.

49" to 59"

37" to 48"

SRJ5

25" to 36"

13" to 24"

12" or Less

SRJ4

SRJ3

SRJ2

SRJ1

Adaptor

14" Removable SRJ3, SRJ4, & SRJ525" Removable All -C Models

Figure9.SelectionofRoofJack&AccessoriesChart

DamperInstallationAnautomaticshut-offdamperisavailable(seereplacementpartslist).Anautomatedshutoffdamperisrequiredwhenthehomeisairconditionedbyaself-containedunit.Thisdamper is designed to fit in the feeder duct cavity, directly underthefurnace.Adamperisrequiredtopreventchilledair from flowing over the furnace heat exchanger. Forproper installation, refer to the instructions provided with the damper.

Cb-200A Cottage base installationTheCMF2canbeinstalledonaCB-200Acottagebaseincertainapplications,aslistedinTable2(page6).Referto the Replacement Parts List for information on ordering thisbase.Forinstallation,refertotheinstructionsthatareprovidedwiththeCB-200Abasekit.

Figure10.RoofJack

Insert Sliding Pipe

Fasten CeilingTrim Plates

Ceiling

Roof

Roof Jack Adaptor

Install With LineBelow Ceiling

Remove three screwsto separate two piecemodels; replace withprotective cap fortransit only

Fasten roof flashing to adaptoror flat roof; apply sealant orcaulking underneath

Fasten adaptor to sloped roof; applysealant or caulkingunderneath

15

FUel ConneCtions

• Allgaspipingmustbeinstalledincompliancewithlocalcodesandutilityregulations.IntheabsenceoflocalcodesthegaslineinstallationmustcomplywiththelatesteditionoftheNationalFuelGasCode(Ansi Z223.1) or (CAn/CGA b149.1 or .2) installation Codes.

• Somelocalregulationsrequiretheinstallationofamanualmainshut-offvalveandgroundjointunionexternaltothefurnace.Theshut-offvalveshouldbereadilyaccessibleforserviceand/oremergencyuse. Consult the local utility or gas supplier foradditional requirements regarding placement ofthemanualmaingasshut-off.

• Gaspipingmustneverruninorthroughairducts,chimneys,gasvents,orelevatorshafts.

• CompoundsusedonthreadedjointsofgaspipingmustberesistanttotheactionsofLPpropanegas.

• Themaingasvalveandmainpowerdisconnecttothefurnacemustbeproperlylabeledbytheinstallerincaseemergencyshutdownisrequired.

• Flexiblegasconnectorsarenotrecommendedforthistypeoffurnacebutmaybeusedifallowedbylocal jurisdiction. Only new flexible connectorsmaybeused.Donotuseaconnectorwhichhaspreviouslyservicedanothergasappliance.

• Adriplegshouldbeinstalledintheverticalpiperuntotheunit.

TheCMF2furnacemaybeinstalledwithgasentrythroughthe bottom of the furnace. When installing the gas line, connect a separate gas line from the gas meter to the burnerwithamanualshut-offvalveinstalledinthesupplylineatthefurnace.Alwaysusenewcleanpipingandroutethe line in an easily accessible manner. The piping and threading must be free from cutting burrs and defects. Thelinemustbedurable,substantial,andgastight.Anadditionalmainmanualshut-offvalvemaybeinstalledinthegassupplylinetoshut-offthemainfuelsupply,ifdesired by the homeowner or required by local codes.

The proper gas supply line size can be determined using the gas piping chart, shown in Table 3. Black pipe is the most practical for natural gas, because of the larger sizes required.Coppertubingwithaninternalcoatingoftinisrecommendedforusewithpropane(LP)gasinstallations.

Table3liststhegasflowcapacitiesforstandardpipesizesas a function of length in typical applications based on nominal pressure drop in the line.

Gaspiping-PGSeriesOnly

Table3.PipeLengthSelectionChart

TypeofPipe

MaximumPossiblePipeLengthRequiredfor

DifferentPipeDiameters

1/2” 5/8” 3/4” 1”

Black Iron Pipe for Natural Gas 20’ - 60’ 100’

AluminumorCopperTubingforNatural Gas

10’ - 30’ -

AluminumorCopperTubingforLP Gas

- 40’ 100’ -

LeakCheck

Fire or eXPlosion HAZArDFailuretofollowsafetywarningsexactlycouldresultinseriousinjuryorpropertydamage.

Nevertestforgasleakswithanopenflame.Use a commercially available soap solutionmade specifically for the detection of leakstocheckallconnections.Afireorexplosionmayresultcausingpropertydamage,personalinjuryorlossoflife.

WArninG:

After the gas piping to the furnace is complete, allconnections must be tested for gas leaks. This includes pipe connections at the main gas valve, emergency shutoffvalveandflexiblegasconnectors(ifapplicable).The soap and water solution can be applied on each

Fire or eXPlosion HAZArD• Failuretofollowsafetywarningsexactlycould

resultinseriousinjuryorpropertydamage.• Installationandservicemustbeperformed

byaqualifiedinstaller,serviceagencyorthegas supplier.


WHAt to Do iF YoU sMell GAs• Donottrytolightanyappliance.• Donot touchanyelectricalswitch;donot

useanyphoneinyourbuilding.• Leavethebuildingimmediately.• Immediately call your gas supplier from a

neighbor’sphone.Followthegassupplier’sinstructions.

• Ifyoucannotreachyourgassupplier,callthefiredepartment.

WArninG:

16

joint or union using a small paintbrush. If any bubbling is observed, the connection is not sealed adequately and must be retightened. Repeat the tightening and soap check process until bubbling ceases.

IMPORTANTNOTE:Whenpressuretestinggassupplylinesatpressuresgreaterthan1/2psig(14inchW.C.),thegassupplypipingsystemmustbedisconnectedfromthefurnacetopreventdamagetothegascontrolvalve.Ifthetestpressureislessthanorequalto1/2psig(14inchW.C.),closethemanualshut-offvalve.

required that you measure the gas input rate. This may be accomplished in the usual way, by clocking the gas meter and using the local gas heating value. To check the input of the furnace see page 21.

IMPORTANTNOTE:Observetheactionoftheburnerstomakesurethereisnoyellowing,liftingorflashbackoftheflame.

ConvertingtoLPGasTheCMF2furnaceisshippedfromthefactoryforusewithnatural gas but can be converted to use liquid propane gas.UsethefollowingprocedureandFigure12(page17)for converting the gas burner.

1. SetthermostattoOFF.2. Turn off all power to the furnace.3. Openfurnacedoorandlocatethegasvalve.4. PushinonthegasknobandturnittoOFF.5. Shut off gas supply at meter.6. Disconnect gas burner electric cord, gas piping to

burner, and thermostat leads.7. Remove nuts securing burner in place.8. Disconnect inlet pipe union at burner.9. Disconnect the two wires leading to gas control valve.10.RemoveboltssecuringU-shapedmanifoldplate to

orifice assembly.11. Remove the main orifice and replace it with the correct

LP fuel orifice as shown in Table 4. Refer to the rating plate on the furnace to determine the firing rate for your application. note: If the firing rate of your furnace has been converted, make sure the appropriate LP orifice for the new firing rate is installed.

12. Remove the regulator converter on top of the gas valve. Invert the converter so that the red ring will be located at the bottom and the LP stamping on the converter appears up.

13. Screw converter back into the regulator, hand tight plus 1/8 turn.

14. Reinstall the burner assembly into the furnace.15. Reconnect the gas piping and electrical wires to the

gas valve.16.Openthemanualshut-offvalveandfollowtheOperating

Instructions outlined on page 20.

HighAltitudeApplicationInstallation of this furnace at altitudes above 2,000 feet shall be in accordance with local codes, or in the absence oflocalcodes,theNationalFuelGasCode,ANSIZ223.1/NFPA54orNationalStandardofCanada,NaturalGas&PropaneInstallationCodeCGAB149.1.Pleaseconsultyour local code authority.

WArninG:Thereductionofinputratingnecessaryforhighaltitudeinstallationmayonlybeaccomplishedwithfactorysuppliedorifices.Donotattempttodrilloutorificesinthefield.Improperlydrilledorifices may cause fire, explosion, carbonmonoxidepoisoning,personalinjuryordeath.

TheCMF2furnace isshippedfromthefactorywith itsorifices and gas regulator setting for natural gas operation atsealevelaltitudes.At2,000feet,theNFGCrequiresthat this appliance be derated 4% for each 1,000 feet of altitude.Forexample,theinputneedstobereduced8%at 2,000 feet, 12% at 3,000 feet, etc. This deration is in reference to the input rate and gas heating value at sea level.

Highaltitudeconversionforthisfurnacerequiresreducingthe orifice size or decreasing the manifold pressure. When decreasing the manifold pressure, the pressure must not besetbelow3.2inWC.Ifthepressureneedstobesetbelow3.2inWCtoachieveproperderation,thenchangethe orifice size and raise the manifold pressure back to 3.5inWC.

Afterchangingtheregulatorpressureortheorifices,itis

* Timesarebasedonnaturalgasatanaverageof1,000BTUpercubicfoot,aburnermanifoldpressureof3.5inWC,andameterdialsizeof1cubicfoot.** TimesarebasedonLPgasatanaverageof2,500BTUpercubicfoot,aburnermanifoldpressureof3.5inWC,andameterdialsizeof1cubicfoot.

Table4.Natural&LPGasOrifices

burnerDesignation

Firing rateinput (btUH)

natural GasOrifice Number

natural GasTimePerRev.* (sec)

lP GasOrifice

Number

lP GasTime PerRev.** (sec)

GasGun-65-DI-S 65,000 24 55 43 138

GasGun-75-DI-S 75,000 20 48 40 120

GasGun-90-DI-S 85,000 18 43 37 106

17

Oilpiping-POSeriesOnlyThe following procedures are recommended as good practice. However, requirements of local codes andordinances, H.U.D. Manufactured Home and SafetyStandardsorNationalFireProtectionAssociationmustbe satisfied, where they apply, for an approved installation.

• Use a tank capacity suitable for the application with a weatherproof, capped fill opening and shielded vent to let air in as fuel is used. note: The inside of the tank mustbecleanbeforefilling.Allwater,rust,sediment,andotherforeignmattermustbeflushedout.

• If a two pipe system is used or if oil is taken from the bottomofthetank,afilterisrecommended.Amanualshut-off valvemayalsobeusedonasinglepipeortwo pipe system. note: Local codes may dictate the specific installation requirements.

• Afuelortankgaugeisrecommendedforeasycheckingofthefuellevel.Checkthegaugeusingadipstick.

• Locatethestoragetankconvenientlynearthehome.Forabove ground fuel tank installations, the tank may rest threetofourinchesofftheground.Fueltanksmayalsobeburiedifproperlycoatedtoresistcorrosion.Forbelowground fuel tank installations, the vertical dimension from the bottom of the tank to the fuel pump must not exceed 10 feet. Keep the tank filled especially in the summer to reduce the accumulation of condensation.

FuelLineHook-Up:SingleLineSystemThe single line system is highly recommended when vertical lift, from bottom of tank to pump, is less than 8 feet.Asinglelinehookuphastheadvantageofcostingless and giving quieter operation.

FuelLineHook-Up:TwoLineSystemTwo line systems should only be used when the vertical lift exceeds 8 feet.

1. Install the oil feed line as outlined in the Hook-upProcedure.

2. Install the oil pump bypass plug in the bottom return port.

3. Run the return line up through the furnace base to the return port of the pump. Run the other end of the linetothetank,using3/8”O.D.coppertubingor1/4”pipe with the ends capped, and routing the line so it stays clean.

4. Insert the return line through the second opening in the duplex bushing. If the bottom of the tank is lower than the pump intake, the tube should be inserted 3 or 4 inches from the tank bottom. If the bottom of the tank is higher than the pump intake, the return line shouldextendnotmorethan8”insidethetank.

Hook-UpProcedure1. Use3/8”O.D.coppertubingforthefuelline.Capthe

end with tape to keep out dirt while the line is being routed.SeeFigure13(page18).

2. Installduplexbushingfortwo3/8”linesinthetopfittingof the tank.

3. Insert one end of the tubing through the duplex bushing untilitis3”to5”fromthebottomdrain.Tightenthebushing.

4. Route the fuel line where it will not be subject to damage.Makeallbendsgradualandavoidkinksthatmightrestrictoilflow.

5. Opentheburneraccessdoor.Connecttheoillinetothe intake port on the pump. Tighten other port plugs on the pump.

6. Makesuretheoillineisairtight!note:Airleakscancause the pump to lose prime and will create other problems such as nozzle failure, odors, rumbling noise, and false safety shut down.

7. Insert the short length of the copper tube level with the bottom of the duplex bushing. Tighten the bushing. Formthetubeintoaninverted“U”toserveasavent.

EliminatingAirLeaksTo eliminate problems caused by air in the oil line, all connections in the oil supply line and all plugs, nuts, and fittings on the pump must be airtight, including the nut that covers the pressure adjustment. It is important that thehook-upbedonewithagoodflaringtool.

FuelOilTypeGrade No. 1 may be used where the oil supply is subject to low temperatures. Do not use fuel oil heavier than Grade No.2.Biodieselblendsupto5%(B5)arealsoacceptable.

Do not Use GAsoline, CrAnKCAse oil, or AnY oil ContAininG GAsoline.

WArninG:Failure to keep supply oil clean may causefailureofcertaincomponentssuchasthefuelpumpgears,checkvalve,shaftseal,orburnernozzlewhichmayresultinaburnerfire.

Figure12.LP&NaturalGasConversion

Orifice

InletU-ShapedManifold

RegulatorConverter

Gas Control Knob

18

• Electrical connections must be in compliance withall applicable local codes and ordinances, and with the current revision of the National Electric Code (ANSI/NFPA70).

• ForCanadianinstallations,theelectricalconnectionsandgroundingshallcomplywiththecurrentCanadianElectricalCode(CSAC22.1and/orlocalcodes).

Pre-ElectricalChecklist:√Verifythevoltage,frequency,andphaseofthesupply

source match the specifications on the unit rating plate.√Verifythattheserviceprovidedbytheutilityissufficient

to handle the additional load imposed by this equipment. RefertotheunitwiringlabelorTable5(page19)forproper high and low voltage wiring.

√Verifyfactorywiringisinaccordancewiththeunitwiringdiagram(Figure18,page29).Makesurenoconnectionsloosened during shipping or installation.

line voltage• Anelectricaldisconnectmustbelocatedwithin

sight of and easily accessible to the unit. This switchshallbecapableofelectricallyde-energizingthe outdoor unit. See unit data label for proper incomingfieldwiring.Anyotherwiringmethodsmustbe acceptable to authority having jurisdiction.

• Itisrecommendedthatthelinevoltagetotheunitbesupplied from a dedicated branch circuit containing the correct fuse or circuit breaker for the unit. See Table5(page19)forunitspecifications.

• Overcurrentprotectionmustbeprovidedatthebranchcircuit distribution panel and sized as shown on the unit rating label and according to applicable local codes.

• Useonlycopperwireforthelinevoltagepowersupplytothisunit.Use14-2TypeNMcableorcodeagencylisted conduit and a conduit connector for connecting the supply wires to the unit.

• If replacing any of the original wires supplied withthe unit, the replacement wire must be copper wire consisting of the same gauge and temperature rating.

• Providepowersupplyfortheunitinaccordancewiththe unit wiring diagram, and the unit rating plate. The installer should become familiar with the wiring diagram/schematic before making any electrical connectionstotheunit.SeeFigure18.

Wiring Connections1. Opentheappliancedoorforaccesstothecontrolbox.2. Remove the control box cover.3. Connecttheblackwireofthefurnacetotheblackwire

of the power supply cable.4. Connectthethewhitewireofthefurnacetothewhite

wire of the power supply cable.5. Connectthegroundwireofthepowersupplycable

to the green screw in the control box of the furnace.6. Verifyallelectricalconnectionsaresecurelyconnected.7. Replace the control box cover.

Grounding

WArninG:Theunitcabinetmusthaveanuninterruptedorunbrokenelectricalgroundtominimizepersonalinjuryifanelectricalfaultshouldoccur.Donotusegaspipingasanelectricalground!

This unit must be electrically grounded in accordance with local codes or, in the absence of local codes, with theNationalElectricalCode(ANSI/NFPA70)ortheCSAC22.1ElectricalCode.Usethegroundinglugprovidedinthe control box for grounding the unit.

eleCtriCAl sHoCK, Fire oreXPlosion HAZArD

Failuretofollowsafetywarningsexactlycouldresultinseriousinjuryorpropertydamage.

Improperservicingcouldresultindangerousoperation, serious injury, death or propertydamage.

• Before servicing, disconnect all electricalpowertofurnace.



WArninG:

eleCtriCAl ConneCtions

Figure13.RecommendedTankHook-Up200-300GallonTank

Drain

End of Oil Supply Line3" to 5" AboveBottom Drain

Guide pipe

GaugeVent with

Cap 2" DuplexBushing 2" Fill

3/8" Oil Supply Line

Note: Additional venting maybe required if tank is filled rapidly.

19

ThermostatConnections• Thermostatconnectionsshallbeinaccordancewiththe

instructions supplied with the thermostat and the indoor equipment. The low voltage wires must be properly connected to the units low voltage terminal block. Route r&W from the thermostat to the burner compartment. Connectr to one of the low voltage terminals of the burner.ConnectW to the burner’s other low voltage terminal.

• Asinglestagethermostatisusedwiththisequipmentand must operate in conjunction with any installed accessories.

• Thethermostatshouldbemountedabout5feetabovetheflooronaninsidewall.DONOTinstallthethermostatonan outside wall or any other location where its operation may be adversely affected by radiant heat from fireplaces, sunlight, or lighting fixtures, and convective heat from warm air registers or electrical appliances. Refer to the thermostat manufacturer’s instruction sheet for detailed mounting and installation information.

• Theheatanticipatorofthethermostatshouldbeadjustedto .4 amps for power oil models, and .9 for power gas direct ignition models.

HeatAnticipatorSet the heat anticipator according to the instructions supplied by the thermostat manufacturer. To determine theheatanticipatorsetting:1. Addthecurrentdrawofthesystemcomponents;or2. Measurethecurrentflowonthethermostatr-W circuit

after the circulating blower motor has started.

BlowerSpeedTheCMF2furnaceisequippedwitha3speedPSCmotorthatispre-setatthefactoryforHIGHspeedoperation.Foroptimumsystemperformanceandcomfort, itmaybe necessary to change the factory speed setting. This is accomplished by changing a wire connection at the blower motor. Refer to the wiring diagram label on the insideofthepaneldoororseeFigure18(page29)forwiring configuration. Table 6 lists the proper circulating air flowandtemperaturerisefortheCMF2furnace.

CAUtion:Toavoidpersonalinjuryorpropertydamage,makesurethemotorleadsdonotcomeintocontactwithanyuninsulatedmetalcomponentsoftheunit.

• High Speed Operation:Connecttheblack wire from the fan switch to the black wire of the blower motor. note: This is the factory default setting and should not be changed if high speed operation is desired.

• Medium Speed Operation:Connect theblack wire from the fan switch to the blue wire of the blower motor.

• Low Speed Operation:Connecttheblack wire from the fan switch to the red wire of the blower motor.

ConstantBlowerOperationTheFANON&OFFswitchislocatedontopofthecontrolbox. This switch provides either automatic operation of the blower through the thermostat or constant blower opeation.

CMF 80 PGConvertible

CMF 80 PoConvertible

FactorySetFiringRate(btu/hr)* 75,000 75,000

HeatingCapactiy(btu/hr) 56,000 60,000

KitConvertedFiringRate(btu/hr)**65,000

or85,000

65,000or

85,000

AFUERating(%) 75+ 80+

OrificeNumber(NaturalGas) 20 N/A

OrificeNumber(PropaneGas) 40 N/A

BurnerNozzleforOil N/A 0.60gph;A;80o

Blower D x W 10 x 7 10 x 7

MotorH.P.-Speed-Type 1/4-3-PSC 1/4-3-PSC

MotorFLA 6.0 6.0

FuseorBreaker 15Amps 15Amps

Nom.AnticipatorSetting 0.6 0.6

TemperatureRiseRange(oF) 55o-85o 55o -85o

notes:Electrical:Allmodelsare115volt,60Hz,1phase.Thermostatcircuitis24V,60Hz,15VAC.Gasconnections:1/2”NPT.AFUE=AnnualFuelUtilizationEfficiency* Ratingsto2,000feet.Over2,000ft,reduceratingsby4%for

each additional 1,000 ft above sea level.** ThefiringrateoftheCMF80Convertibleseriesfurnacescanbe

changed using an approved conversion kit.

Table5.CMF2Specifications

Table6.CMF2AirflowData

Externalstatic

Pressure(in WC)

Airflow (CFM)

LowspeedFor

65Kbtu/hInput

MediumSpeedFor

75Kbtu/hInput

HighSpeedFor

85Kbtu/hInput

0.1 730 920 10000.2 690 880 9600.3 650 840 9000.4 610 780 8600.5 560 740 8100.6 510 690 760

20

Pre-StartCheckList√Verifythepolarityoftheconnectionsarecorrect,the

line voltage power leads are securely connected and the furnace is properly grounded.

√Verify the thermostat wires (r & W) are securelyconnected in the burner compartment.

√Verifythegaslineservicepressuredoesnotexceed10.0inchesofW.C.,andisnotlessthan4.5inchesW.C.fornaturalgas.ForLPgasthelineservicepressuremustnotexceed14in.W.C.,andmustnotbelessthan11.0in.W.C.

√Verifytheroll-outandmanualresetswitchisclosed.Ifnecessary, press the red button to reset a switch. Do NOTinstallajumperwireacrossaswitchtodefeatitsfunction.Ifaswitchreopensonstartup,DONOTreset the switch without identifying and correcting the fault condition.

√Verifytheblowerdoorisinplace,closingthedoorswitchin the line voltage circuit.

√Verifythegaslinehasbeenpurgedandallconnectionsare leak free.

OperatingInstructionsforPGDirectIgnitionburnerDo not perform these steps until all of the safety checks havebeencompleted:

1. STOP!Readallsafetyinformationonthispage.2. SetthethermostattoOFFortoitslowestsetting.3. Turn off all electric power to the appliance. note: This

appliance is equipped with an ignition device which automatically lightstheburner.DONOTtryto lightthe burner by hand.

4. Turn the latch and open the furnace door.5. Push in the gas control knob and turn to OFF.

iMPortAnt: Do not ForCe. Wait 10minutestoclearoutanygas.Ifyoustillsmellgas,STOP!andreadWHATTODOIFYOUSMELLGAS. If you don’t smell gas, go to the next step.

6. TurnthegascontrolknogtoON.7. Closethefurnacedoorandturnthelatch.8. Turn on all electric power to the appliance.9. Turn the thermostat to ON and set to the desired

setting.10.Iftheappliancewillnotoperateafteronere-try,follow

the instructionsShuttingOff theGasSupplybelowand call your service technician or gas supplier.

ShuttingOfftheGasSupply1. SetthethermostattoOFFortoitslowestsetting.2. Turn off all electric power to the appliance if service

is to be performed.3. Turn the latch and open the furnace door.4. PushinthegascontrolknobandmovetoOFF.DO

NOTFORCE.5. Closethefurnacedoorandturnthelatch.

Fire or eXPlosion HAZArD• Failure to follow safety warnings exactly

could result in serious injury or propertydamage.

• Installationandservicemustbeperformedbyaqualified installer,serviceagencyorthegassupplier.


WHAt to Do iF YoU sMell GAs• Donottrytolightanyappliance.• Donottouchanyelectricalswitch;donot

useanyphoneinyourbuilding.• Leavethebuildingimmediately.• Immediatelycallyourgassupplierfroma

neighbor’sphone.Followthegassupplier’sinstructions.

• Ifyoucannotreachyourgassupplier,callthefiredepartment.

WArninG:

stArt-UP & ADJUstMentsImportantSafetyInformation

WArninG:Allsafetyinformationmustbefollowedduringthe start-up and operation of the furnace.Unqualifiedindividualsshouldnotattempttointerprettheseinstructions.Improperservicingcouldresultindangerousoperation,propertydamage,personalinjuryordeath.

• Thisappliancedoesnothaveapilot.Itisequippedwithan ignition device which automatically lights the burner. Donottrytolighttheburnerbyhand.

• BEFORELIGHTINGOROPERATINGsmellallaroundthe appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and willsettleonthefloor.

• Use only your hand to push in and move the gascontrol lever. Never use tools. If the lever will not push in by hand, don’t try to repair it, call a qualified service technician.Forceorattemptedrepairmayresult inafire or explosion.

• Shouldoverheatingoccur,orthegassupplyfailtoshutoff,turnthemanualgasvalvetotheapplianceOFF.

21

CheckingtheInputoftheFurnaceRefer to the furnace rating plate to determine the firing rateofthefurnace.UsingTable4(page19),determinethe appropriate orifice size for the firing rate and gas beingusedinyourapplication.Checktheburnerorificetoensure that it is the correct size. The input of this furnace canbecheckedusingthefollowingsteps:1. Shut off all other gas fired appliances.2. Start the furnace run it for at least 3 minutes.3. Measure the time (in seconds) required for the

gas meter to complete one revolution. note:Onerevolution equals 1 cubic foot of gas.

4. Compare the time measured with the appropriatetimelistedinTable4(page16).Ifthetimevariesbymore that 5% from the times shown in the table, then measure the inlet and gas valve manifold pressures. SeeCheckingtheInletGasPressureandCheckingtheManifoldPressuressectionsbelow.

WArninG:Donotattempttodrillthegasorifices.Useonlyfactory supplied orifices. Improperly drilledorifices may cause fire, explosion, carbonmonoxidepoisoning,personalinjuryordeath.

5. If the inlet gas pressure and the manifold pressure are both properly set, then check the burner orifice to ensurethatitisproperlysized.Furthergasproblemsshould be referred to the local gas supplier.

CheckingtheInletGasLinePressureThe inlet gas line pressure can be checked at the port located on the inlet end of the gas valve. See Installing thePressureGaugeorU-TubeManometersection.• Natural gas installations: The inlet gas line pressure

atthegasvalvemustbebetween5in.W.C.&7in.W.C.• LP gas installations: The inlet gas line pressure at the

gasvalvemustbebetween11in.W.C.&13in.W.C.

CheckingtheManifoldPressureThe manifold pressure can be checked at the port located on the gas outlet end of the gas valve using a pressure gaugeorU-tubemanometer.Ifthemanifoldpressureisnot equal to the values below, then it must be adjusted. SeeInstallingthePressureGaugeorU-TubeManometer.• Natural gas installations: The manifold pressure must

besetat3.5in.W.C.• LP gas installations: The manifold pressure must be

setat10.0in.W.C.

AdjustingtheManifoldPressure1. Remove the regulator converter from the gas valve,

SeeFigure14.2. Turn the adjusting screw clockwise to increase the

pressure or counterclockwise to reduce the pressure. 3. After setting the manifold pressure, replace the

regulator converter in the same manner it was removed earlier.

InstallingthePressureGaugeorU-TubeManometer1. Determinewhichtypeofpressure(inletgasormanifold

pressure)needstobemeasured.2. Usinga3/16”Allenwrench,removetheappropriate

tap plug located on the gas valve. See Figure 14. note: To measure the inlet gas pressure, remove the tap plug on the inlet side of the gas valve. To measure the manifold pressure, remove the tap plug on the outlet side of the gas valve.

3. Installafittingthathasa1/8”NPTpipethreadandis compatible with the pressure gauge or U-tubemanometer on the valve.

4. Connect thepressuregaugeorU-tubemanometerto the gas valve. Refer to the gauge manufacturer’s supplied instructions for proper hookup and usage.

5. Aftermeasuringthepressure,removethepressuregaugeorU-tubemanometerfromthegasvalveandreplace the tap plug. note:Makesurethetapplugistightandisn’tcross-threaded.

INLETTAP

OUTLETTAP

RegulatorConverter

Figure14.DirectIgnitionGasValve

AdjustingtheBurnerTheairshutterof thegasgunburner ispre-setat thefactory and should not be adjusted unless the firing rate of the furnace needs to be converted. The burner should run quietly. Verify the air shutter setting is correct asshown in Table 7. note: It is very important that there is an ample supply of combustion air without decreasing burnerefficiency.Aninadequateamountoffreshaircancause carbon monoxide (CO) production.The carbondioxide(CO2)contentoftheflueproductsshouldbeinthe range of 8.0% to 9.0% for natural gas and 9.0% to 10.0% for LP gas.

Table7.AirShutterSettingforDifferentFuels

input(btU/H)

naturalGas setting

lP Gassetting

oil setting

65,000 3.7 3.75 3.75

75,000 4.5 4.5 4.0

85,000 5.5 5.5 5.0

22

WArninG:Donotattempttodrillthegasorifices.Useonlyfactory supplied orifices. Improperly drilledorifices may cause fire, explosion, carbonmonoxidepoisoning,personalinjuryordeath.

At2,000feet,theNFGCrequiresthatthisappliancebederated4%foreach1,000feetofaltitude.Forexample,the input needs to be reduced 8% at 2,000 feet, 12% at 3,000 feet, etc. This furnace can be derated by reducing the orifice size or decreasing the manifold pressure. When decreasing the manifold pressure, the pressure must not besetbelow3.2in.W.C..note: If the pressure needs tobesetbelow3.2 in.W.C. toachieve theproperde-rate, then change the orifice size and raise the manifold pressurebackto3.5in.W.C..

OperatingInstructionsforPOOILBurnersOilburnersinPOseriesfurnacesarefactoryequippedwith a primary control capable of either intermittent or interrupted ignition.

Start-UpProcedure1. Openallmanualshut-offvalvesintheoilsupplyline

from the tank to the burner.2. TurnONtheelectricalsupplytothefurnace.3. Set the room thermostat to the desired temperature.

Air-BleedProcedure-SinglePipeInstallation1. Openthedoortothefurnace.2. Attach1/4”I.D.plastictubeovertheendoftheairbleed

valveontheoilpumpasshowninFigure15.Placethe other end of the tube in a large container.

3. Pull the door interlock switch out to start the burner.4. Turn the airbleed valve open not more than 1/2 turn

togetafastflowofoilintothecontainer.5. To assure continuous operation, use a wire to jump

terminalsT-Tontheprimarycontrolwhileburnerisrunning. If furnace is equippedwith theHoneywellR7184 or Beckett 7505 primary control, perform the next3stepstoprimetheoilpump:a. While the ignition is on, press the reset button for

1/2 second or less and release the reset button. The lockout time will be extended to 4 minutes.

b. If prime is not established within the 4 minutes, the control will lock out. Press the reset button to reset thecontrolandgobacktostep“a”.

c. Repeatsteps“a”&“b”,ifneeded,untilthepumpisfully primed.

6. Whenoilflowisclearofairbubbles,closeair-bleedvalve and tighten. note:Airbleedouttimewillvarydepending on length of oil line, number of bends, etc.

7. Remove the jumper wire on the primary control.

Figure15.OilPump

4 GPH 100-150 PSI 3450 RPM

3 GPH 150-200 PSI 3450 RPM

VALVE ON DELAY

NO. 2 & LIGHTER FUEL

USE ONLY WITH

INLET BY-PASS

Exclusively for BeckettMade by Suntec

INLET

NO. 2 FUEL

A2EA-6520

Beckett

Nozzle Port3/16 Flare Fitting

Bypass Solenoid ValveCordset

Inlet Port1/4 NPTF

Bleed & Gauge Port

Pressure AdjustmentScrew

Inlet Port1/4 NPTF

Return Port - Install 1/6” Bypass PipePlug for 2-pipe System Only.

(Use 5/32” Allen Wrench)

note: If furnace is equipped with the Beckett 7505 primary control,primetheoilpumpusingthefollowingsteps:

1. Aftertheburnerstarts,pressandholdtheresetbuttonfor 15 seconds until the yellow light turns on. This indicates that the button has been held long enough.

2. Release the reset button. The yellow light will turn off and the burner will start up again.

3. At burner start up, click the reset button while theigniter is still on. note: This will transition the control to a dedicated pump prime mode, during which the motor, igniter and valve are powered for 4 minutes. The yellow light will be on. note: If the prime is not established during the 4 minute pump prime mode, repeat step 3 until the pump is fully primed.

OilBurnerShutdownProcedureSettheroomthermostatto“OFF”oritslowestsetting.

FlameAdjustment1. Set the thermostat below room temperature to start

the furnace.2. Allowthefurnacetooperateforabout10minutes.3. Adjusttheairshuttersettinguntil11%CO2 with zero

smoke or less is achieved. note: The draft over the firemustbeatleastnegative0.02in.W.C.ThefactorysetairshuttersettingsareshowninTable7(page21).

Electrode SettingTheelectrodesettingiscarefullysetatthefactory.However,during transit, the setting of the electrodes may become improper. Before attempting to start the oil burner, check the positioning of the electrodes to ensure that they are properlypositioned,asshown inFigure16 (page23).Improperly adjusted electrodes can result in poor ignition. Donotpermittheelectrodestobecloserthan¼”toanygrounded surface.

Switching from Interrupted to intermittent Ignition ControlHoneywellandBeckettoilprimarycontrolscanbeswitchedbetween interrupted and intermittent ignition control. To switchfrominterruptedduty(Factoryset)tointermittentduty,removetheblueignitorwirefromthequick-connectterminal.Attachtheburnermotorandigniterwiretothe

23

burner motor (orange) control terminal by splicing oradding tab adapters. Seal and isolate any bare wires. SeeFigure16.

FiringRateConversionTheratedfiringratesoftheCMF280convertiblefurnaces(PO&PG)canbeadjustedfromthefactorysettingof75,000 BTU/hr. The firing rate can be changed to either 65,000 BTU/hr or to 85,000 BTU/hr using the appropriate certifiedNORDYNEconversionkitinstalledbyaNORDYNEdistributororServicePRO.SeetheReplacementPartsListing for the appropriate kit number to order.

Figure16.POOilBurnerElectrodeSettings

5/32” GAPELECTRODE

NOZZLE

0-1/16”

5/16” ABOVE CL

1 1/8”

oPerAtinG seqUenCePG Gas Furnaces1. The thermostat calls for heat by energizing the W

terminal with 24 volts.2. The combustion blower motor energizes. After the

motorbeginstorotate,thecentrifugalswitch(locatedinthemotorendcap)closes.

3. A30secondpre-purgeperiodbeginsandtheignitioncontrol initiates an internal safety start check.

4. If ignition control passes the safety check, a 15 second ignitorwarm-upperiodbegins.Duringthisperiod,theignitor warms up to an ignition temperature.

5. The control applies 24 volts to the gas valve.6. Theignitorignitesthegas,andthepresenceofflame

must be detected within a timed trial ignition period. note:Ifflameisdetected,theignitorisde-energizedand the gas valve will remain open until the call for heatfromthethermostat iscompleted.If theflameis not detected, the control will close the gas valve at the end of the timed trial ignition period. The control will attempt ignition 2 more times before locking out.

7. The circulating air blower will energize when the temperature fan switch closes.

8. When the thermostat demand for heat is satisfied, the Wterminalde-energizesthegasvalvecircuitandthegas valve will close.

9. Thecirculatingairblowerwillde-energizewhenthetemperature fan switch opens.

notes:• Thecontrolwillclosethegasvalveiftheflamesensor

doesnotdetectthepresenceofaflame.Thecontrolwillattempttore-ignitethegas2timesbeforelockingout.Iflock-outoccurs,thecontrolcanberesetbysettingthe thermostat below room temperature for at least 45 seconds, and then returning it to the desired setting.If adjusting the thermostat does not reset the ignition control, turn off all power to the appliance for 45 seconds, and then turn it back on.

• If the gas control has been replaced or serviced, lighting may not be satisfactory until air has been purged from the gas line or the gas input and combustion air have been adjusted.

Po oil FurnacesThe processes listed below are applicable only to furnaces equippedwithaHoneywellR7184orBeckett7505Control.1. Whenacallforheatisinitiated,thereisa2-6second

delay while the control performs a safe start check.2. The ignition and motor turn on for the 15 second valve

ondelay.Followingthedelay,thevalveenergzesandaflameshouldestablishwithina15-secondlockouttime.

notes:• Ifflameisnotsensedwithinthe15-secondlockouttime,

the control shuts down on safety lockout. The reset button on the control must be manually reset.

24

• If control locks out 3 times, the control enters restricted lockout.Toreset:HoneywellR7184:holddowntheresetbuttonfor45secondsuntiltheLEDflashesonce.Beckett7505:holddownresetbuttonfor15secondsuntilthered light turns off and the yellow light turns on.

3. Afterflameisestablished,theignitionremainsONfor10secondstoensureflamestability.Itthenturnsoff(interruptedignition).

4. The circulating air blower will energize and the temperature fan switch will close.

5. The furnace runs until the demand for heat is satisfied and the burner shuts down.

6. Thecirculatingairblowerwillde-energizewhenthetemperature fan switch opens.

WArninG:

PG Direct ignition-Gas Gun (Power burner)

iMPortAnt notes:• Ifaconditionexiststhatcausestheignitioncontrolto

go into safety lockout, meter readings must be taken quicklyafterrestart-withintrialforignitionperiod.

• Alwaysde-energizethesystemforatleast45secondsbefore recycling for further tests.

• The ignition control cannot be repaired. If thetroubleshooting procedure indicates a malfunction in the control, it must be replaced.

HighGasBills• Checkthecombustionairadjustment.• Verifythepropersizeorificeisbeingused.• Checkthereturnairfilterisclean.• Besurethehomeisinsulated,windowsanddoorsfit

tightly, and there are no air leaks in the heating ducts.

troUblesHootinG

eleCtriCAl sHoCK, Fire oreXPlosion HAZArD

Failuretofollowsafetywarningsexactlycouldresult inserious injuryorpropertydamage.Onlypersonstrainedandexperiencedindirectigntionsystemsshouldservicethisequipment.

Improperservicingcouldresultindangerousoperation, serious injury, death or propertydamage.

• Before servicing, disconnect all electricalpowertofurnace.



• Checkroomthermostat.Makesurethesettingisnothigher than necessary. Low humidity levels require higher temperatures for comfort. Perhaps humidity should be increased.

Burnermotordoesnotrun-thermostatcallsforheat.• Defectivethermostatcircuit-bridgeTTconnectionson

burnerjunctionbox.SeeFigure18(page29).Ifburnermotor runs, check thermostat and connections between furnace and thermostat.

• Novoltagetoburner-plugtestlampintoburnerplugreceptacle.Ifitdoesnotlight,check:— Blown fuse, electric supply off— Door switch not making contact— Limit switch in open mode—Airfilterforproperairflow— Loose wire connections— Tripped manual reset auxiliary limit.

• 120volts isavailable toburner -Test lampdoesnotlight.Removejunctionboxcoveronburner,checkfor:— Loose wires— Defective transformer— Defective motor

Burnermotordoesnotrun,nomainflame.• Defectivecentrifugalswitch.Checkswitchoperationby

removing end bell of the burner motor.• Checkforgassupply-gaslinevalveandcontrollever

are on.• Checkforburnersafetylockout.(Restartburner)• Checkfor24voltstoignitioncontrol(SeeFigure18).

—Novoltageatpurgetimer-checkthecentrifugalswitch in the combustion motor.

—Novoltagetoignitioncontrol-checkpurgetimerand allow 1 minute for timer to activate.

• Checkfor120voltstoignitioncontrol.UsevoltmeteratL1&L2(SeeFigure18).

Ignitioncontrolispowered(120vand24v).Ignitordoesnot heat up.• RemoveAMPplug fromburner tube receptacleand

check for 120 volts at the plug during ignition sequence.• Replaceignitioncontrolif120voltsisnotsuppliedto

AMPplugwithin3minutesofignitioncyclestart.

120voltsisavailableatAMPplug.Ignitordoesnotheatup.1. Disconnect burner plug from furnace receptacle.2. DisconnectAMPplugfromburnertubereceptacle.3. Check ignitor circuit through receptacle with an

ohmmeter. Normal ohm reading should be between 40 to75ohms.Aninfiniteorzeroohmreadingindicatesa defective ignitor and must be replaced.

5. Checkforcontinuityfromignitorreceptacletoburnerground.

6. Checkforhairlinecracksinignitor’sinsulatingceramic.

25

24 volts supplied to gas valve during ignition but no maingasflow.• Gasvalvemaybedefective.Replaceifnecessary.• Gaspipingmaybeplugged.Checkforadequategas

supply to gas valve at union.

Mainflameignitesbutburnerlocksout.• Ignitioncontrolisnotproperlygrounded.

WArninG:Whenreplacingtheignitioncontrol,replacementcontrol must have the safety lockout time.FAilUre to FolloW tHis WArninG MAY resUlt in An eXPlosion.

• Defectiveignitioncontrol.• Impropergaspressureorburnerairadjustmentisnot

allowingflametocontact ignitor tip forflameprovingrectification.

Burner operates, insufficient heat• Checkthethermostatforpropersettingandlocation.• Checkforcleanairfiltersandproperairflow.• Checkburnerforpropergasfiringrate.• Verifyunitisnotundersizedforitsthermalload.• Checkthermostatanticipator.(0.9amps)

Burner does not shut off.note: Burner will stop when the door switch is open. With the door open, secure the door switch in the closed position by depressing the switch. The means for securing the door switch must be removed once this testing has been completed.• DisconnectthethermostatwiresfromTTconnections

on the burner junction box. If the burner shuts off, check for:— Short circuit in the thermostat wires.— Defective thermostat.

Burnerhasflamebutmotorisn’trunning• Gasvalvestuckinopenposition.

— Replace the control.— Burner and heat exchanger may need cleaning.

Noisy fire• Re-adjustcombustionairtoreducevolumeofairbeing

drawnintotheburner.SeeAdjustingtheBurner(page21)forflameadjustment.

Circulationblowerwillnotoperateeventhoughtheburner operates.• Turnonthemanualblowerswitch,ifthebloweroperates,

check the fan switch.• Checkthewiringtothemotor.• Checkforaburnedoutmotor.

Po oil FurnaceHoneywellR7184orBeckett7505controlsonly.

Burner does not start with a call for heat.1. Checktheelectricalsupplytofurnace.2. Verifythefurnacedoorswitchisintheonposition.3. Checklinevoltage(115VAC)attheoilprimarycontrol.4. Checkindicatorlightwithburneroff,nocallforheat

(flame).SeeTable8(page26).— If green LED indicator is on, the cad cell sees stray

light or the cad cell of controller is defective.— If green LED indicator is off, go to step 5.—IfLEDindicator isflashing(redorgreen lighton

Beckett7505control),refertostep1below(Resetprimarycontrol).

5. Jumper t to t terminals on primary control.— If burner starts, check thermostat or limit wiring

connections.—Ifburnerdoesnotstart,turnoffpower.Checkall

wiring connections.— If burner does not start, replace primary control.

Burnerstarts&thenlocksoutonsafetywithHoneywellR7184LEDindicatorflashing½secondon,½secondoff.ForBeckett7505control,theredLEDwillflash.

1. Resetprimarycontrol:Toresetthecontrolfrom(soft)lockout, the button needs only to be pressed and released.

• R7184 control: If control is in restricted mode, press andhold thebutton for45seconds-until theLEDflashesonce.

• 7505 control: If control is in restricted mode, press and hold the button in for 15 seconds until the red turns off and the yellow LED turns on.

note:RestrictedLockout:Ifthecontrollocksoutthreetimes in a row without a complete heat cycle between attempts,thelockoutbecomesarestricted(hard)lockout.

2. If theLED indicator stopsflashingand the ignitionremains off, the primary control could be defective. If line voltage is present at the igniter terminals, and there is no ignition, the igniter is likely defective and needs to be replaced.

3. If theLEDstopsflashing,burner turnson,but thecontrol locks out again, check the cad cell. See step 5 below. If the cad cell is operational, replace the primary control.

4. If the LED continues to flash at the interval listedabove, verify that the control is not in restricted mode. If in restricted mode, reset it. If not in restricted mode, replace the control.

5. Ifthe(LEDindicatorforR7184control;greenLEDfor7505control)staysoffwhiletheflameison,checkthecadcellsightingforviewoftheflame.

6. If the burner locks out, check the cad cell resistance. SeeTable9(page26).

26

7. If the burner stays running, the system is operational.8. Ifthe(LEDindicatorforR7184control;greenLEDfor

7505control)isoff,checkthecadcellassemblyafterdisconnecting the line voltage. See Table 9.

CoMPonent FUnCtionsCombustionBlowerCentrifugalSwitchThe electric motor for the blower which supplies combustion air to the burner is equipped with a centrifugal switch wired in series with the burner controls. This switch is normally open until the speed of the blower motor closes it thereby powering the burner controls. The burner controls will not function until the blower motor is operating at full speed.

FanSwitchTheFANONandOFFswitchislocatedontopofthecontrolbox. This switch provides either automatic operation of the blower through the thermostat or continuous blower operation.

FanLimitSwitchThe fan limit switch closes and turns on the main blower afteraperiodofburnerONtimewhenthermostatcallsfor heat. The fan limit switch opens after the thermostat issatisfied.ThebloweroperatesaperiodofburnerOFFtime and turns the blower off.

Gas burner ControlsThegasvalvelevercanbesettoONorOFF,asshowninFigure14 (page21).When in theONposition, gasflowthroughthegasvalveisallowedwhenthevalveisenergizedelectrically.WhenintheOFFposition,gasflowis completely shut off.

SupplyAirLimitSwitchThe supply air limit switch is the safety device that prevents the furnace from exceeding the maximum allowable outlet temperature.

AuxiliaryLimitThis furnace is equipped with an auxiliary manual reset limit. This limit will trip in the event of a blower motor failure. If the limit trips, reset the limit by firmly pressing the red button in the center of the limit. The limit is located on the left hand side of the blower assembly. If the limit will not reset, continues to trip, or the blower does not function, notify your servicing contractor.

HoneywellR7184Control

IndicatorLED status

OnCadcellissensingflame(couldbeflameorstraylight)

Off Cadcellisnotsensingflame

Flashing(1/2sec.on,1/2sec.off) Lockout/Restricted Lockout

Flashing(2sec.on,2sec.off) Recycle

Beckett7505Control

Lightcolor OnContinuously Flashing

Red Restricted(Hard)Lockout Soft Lockout

Green Cadcellissensingflame(couldbeflameorstraylight) Recycle

YellowPump prime mode or reset button currently held for 15+ sec.

N/A

Table8.CadCellFaultConditions

Table9.CadCellResistancewhensensingflame

HoneywellR7184

LEDFlashes(Ohms) CadCellResistance

1 0-400

2 400-800

3 800-1600

4 >1600

BurnerwillnotstartandtheLEDindicatorisflashingat2secondson,2secondsoffforR7184(orthegreenLEDisflashingfor7505).

• Holdtheresetbuttondownfor1-2seconds.IfLEDindicatorcontinuestoflash,waitfor60-70seconds.Ifitstillcontinuestoflash,replacetheprimarycontrol.

• Honeywell R7184 control: To check cad cellresistance, press and release the button during the runmode,withtheigniteroff.TheLEDwillflashtoindicate the cad cell resistance. For proper burneroperation, it is important that the cad cell resistance isunder1600Ohms.SeeTable9.

• Beckett 7505 control:Tocheckcadcellresistance,unplugthecadcellleads(yellowwires)fromthecontrol.Measuretheresistancewithameterintheconventionalway (when a flame is present). For proper burneroperation, it is important that the cad cell resistance isunder1,600Ohms.

ControlModuleStatusIndicatorGasFurnace• Oneflash-theinducercentrifugalswitchisstuckclosed.• Twoflashes-thesignalwasnotreceivedbythecontrol

that the inducer centrifugal switch had closed within the time.

• Threeflashes-a failed ignitionattempt,agasvalveerror,orafalseflamesensedduringthewarmupperiod.Afalseflameconditionoccurswhentheflamesensorsensesaflamewithoutaflamepresent.Ifafalseflameoccurs, the control will only return to normal operation afterthefalseflameconditionisnolongerpresent.

• Fourflashes- thecontrolsensesa failurewithin thecontrol board.

OilFurnaceThe indicator lights on the oil primary control provides lockout, recycle, and cad cell indications. See Table 8.

27

Unit MAintenAnCe

WArninG:Shutoffallelectricalpowertotheunitbeforeperforminganymaintenanceorserviceonthesystem.Failuretocomplymayresultinpersonalinjuryordeath.

note:Allservicingofthisheatingapplianceotherthanthe normal maintenance described in this section must be done by authorized trained service personnel. Do not attempt any servicing which requires opening of the control panels.

• Proper maintenance is most important to achieve the best performance from the appliance and should be performed frequently at the beginning of each heating season.

• Keeptheareasuroundingtheunitclean.Keeptheunitclear of obstructions.

Furnace Filter

WArninG:Never operate the furnace without a filter inplace.Accumulatingdustinthereturnaircanbuild up on internal components, resultingin lossofefficiency,equipmentdamage,andpossiblefire.

• CMF2 Furnaces are supplied with a single air filterwhen shipped from the factory. It is recommended that the filter be cleaned or replaced monthly. Newly built or recently renovated homes may require more frequent changing until the construction dust has minimized. repklacement filters are available at most local retailers. Inspect filters frequently and replace when necessary with filter of same dimensional size

• Filtersdesignedtoremovesmallerparticlessuchaspollen, may require additional maintenance.

BlowerCompartmentDirt and lint can create excessive loads on the motor resulting in higher than normal operating temperatures and shortenedservicelife.Vacuumorwipecleantheinterioroffurnacecabinet.Cleanalllintanddustfromaroundthefurnace. It is recommended that the blower compartment be cleaned of dirt or lint that may have accumulated in the compartment or on the blower and motor as part of regular maintenance.

CombustionAirandVentingSystemInspect the combustion air and venting system at the beginning and end of the heating system for deterioration, blockage,ordamage.Cleanthesystem,ifnecessary.

28

FiGUres & tAbles

Figure17.CMF2PhysicalDimensions

57

2414

182

18

2358

2 14 13 5

8

16

92 1

25"

1 14

11 58

11 584" 3 1

8

6 14

29

WirinG DiAGrAM

Figure18.WiringDiagramforCMF2Gas&OilFurnaces

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30

Figure19.FurnaceComponents

loCAtion oF FUrnACe CoMPonents

BlowerAssembly

BlowerMotor

Capacitor

Gas Valve

Circulating AirBlower Oil

Pump

DoorSwitch

ControlPanel

HeatExchanger

Base

Control

Control

instAllAtion / PerForMAnCe CHeCK list

instAller nAMe:

CITY: STATE:

instAllAtion ADDress:

CITY: STATE:

UNITMODEL#

UNITSERIAL#

MinimumclearancesperTable1(page4)?

YES NO

Is the unit properly installed and leveled?

YES NO

Does condensate drain properly inbothdraintubes?

YES NO

Hastheowner’sinformationbeenreviewedwiththehome-owner?

YES NO

Has the literaturepackagebeenleftneartheappliance?

YES NO

eleCtriCAl sYsteM:

Electricalconnectionstight? YES NO

Linevoltagepolaritycorrect? YES NO

SupplyVoltage:___________________________________(V)

Hasthethermostatbeencalibrated? YES NO

Isthethermostatlevel? YES NO

Istheheatanticipatorsettingcorrect? YES NO

ventinG sYsteM:

Is there adequate fresh air supply for ventilation?

YES NO

Ventfreefromrestrictions? YES NO

Filterproperlyinstalled? YES NO

Filterclean? YES NO

Flueconnectionstight? YES NO

Isthereproperdraft? YES NO

ReturnAirTemp:___________________________________(°F)

SupplyAirTemp:___________________________________(°F)

TemperatureRise:__________________________________(°F)

PROPOSITION 65 WARNING: This productcontains chemicals known to the state ofCaliforniatocausecancer,birthdefectsorotherreproductiveharm.

WArninG:

Specifications&illustrationssubjecttochangewithoutnoticeorincurringobligations.O’Fallon,MO|PrintedinU.S.A.(11/12) 709272A (Replaces7092720)

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