Maytag CMF3 Installation guide

Brand: Maytag

Model: CMF3

Category: Stoves

Type: Installation guide

CMF3 70-PG Convertible (60, 70, & 75 KBTU/H Inputs)

CMF3 70-PO Convertible (60, & 70 KBTU/H Inputs)

Counterﬂow Gas or Oil Heating Appliance

INSTALLATION INSTRUCTIONS

For installation in:

• ManufacturedHomes

• Recreational Vehicles, Park Models, & Manufactured

Buildings

• ModularHomes/Buildings

WARNING

FIRE OR EXPLOSION HAZARD

• Failuretofollowsafetywarningsexactlycould

resultinseriousinjuryorpropertydamage.

•Installationandservicemustbeperformed

byaqualiedinstaller,serviceagencyorthe

gassupplier.

•Do not store or use gasoline or other

ammablevaporsandliquidsinthevicinity

ofthisoranyotherappliance.

WHAT TO DO IF YOU SMELL GAS

•Donottrytolightanyappliance.

•Do not touch any electrical switch; do not

useanyphoneinyourbuilding.

•Leavethebuildingimmediately.

•Immediately call your gas supplier from a

neighborsphone.Followthegassuppliers

instructions.

•Ifyoucannotreachyourgassupplier,call

theredepartment.

DONOTDESTROY.PLEASEREADCAREFULLY&KEEPINASAFEPLACEFORFUTUREREFERENCE.

TABLE OF CONTENTS

IMPORTANT SAFETY INFORMATION..........................3

REQUIREMENTS & CODES..........................................3

GeneralInformation......................................................4

OperationofFurnaceDuringConstruction...................4

MinimumInstallationClearances..................................5

GeneralInformation......................................................6

CombustionAirQuality.................................................6

DirectVentFurnaces....................................................6

VentilaireIIIorIV(AccessoryItem)..............................7

CIRCULATING AIR REQUIREMENTS...........................7

Plenums&AirDucts.....................................................7

UnconditionedSpaces..................................................8

ClosetInstallations.......................................................8

FURNACE INSTALLATION............................................8

GeneralInformation......................................................8

BeforeYouInstallthisFurnace....................................8

LocatingtheUnit...........................................................9

MA-200BaseInstallation..............................................9

InstallingtheFurnaceonanMA-200Base..................10

MA-100UniversalBaseInstallation..............................10

InstallingtheFurnaceonanMA-100Base..................10

CombustionAirDuct/PipeInstallation..........................10

SRJRoofJackInstallation............................................11

DamperInstallation.......................................................11

Oilpiping-POSeriesOnly...........................................14

ELECTRICAL CONNECTIONS......................................15

Pre-ElectricalChecklist.................................................15

LineVoltage..................................................................16

WiringConnections......................................................16

Grounding.....................................................................16

ThermostatConnections..............................................16

BlowerSpeed...............................................................16

START-UP & ADJUSTMENTS.......................................17

Pre-StartCheckList.....................................................17

OperatingInstructionsforPGDirectIgnitionBurner....18

OperatingInstructionsforPOOILBurners...................19

FiringRateConversion.................................................19

OPERATING SEQUENCE..............................................20

PGGasFurnaces.........................................................20

POOilFurnaces...........................................................20

TROUBLESHOOTING....................................................21

PGDirectIgnition-GasGun(PowerBurner)................21

POOilFurnace.............................................................22

ControlModuleStatusIndicator...................................22

UNIT MAINTENANCE.....................................................23

FurnaceFilter...............................................................23

BlowerCompartment....................................................23

CombustionAirandVentingSystem............................23

COMPONENT FUNCTIONS...........................................23

FIGURES & TABLES......................................................24

WIRING DIAGRAM.........................................................25

FURNACE COMPONENTS............................................26

INSTALLATION CHECKLIST.........................................28

IMPORTANT SAFETY INFORMATION

INSTALLER:Pleaseread allinstructionsbefore servicing

this 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

Failuretofollowsafetywarningsexactlycould

resultinseriousinjuryorpropertydamage.

Improper servicing could result in dangerous

operation, serious injury, death or property

damage.

•Before servicing, disconnect all electrical

powertoairhandler.

•Whenservicingcontrols,labelallwiresprior

todisconnecting.Reconnectwirescorrectly.

•Verifyproperoperationafterservicing.

WARNING:

Do not use this appliance if any part has been

submergedunderwater.Immediatelycallaqualied

service technician to inspect the appliance and

toreplaceanypartofthecontrolsystemandany

gascontrolthathasbeensubmergedunderwater.

REQUIREMENTS & CODES

WARNING:

This unit must be installed in accordance with

instructions outlined in this manual during the

installation, service, and operation of this unit.

Unqualied individuals should not attempt to

interprettheseinstructionsorinstallthisequipment.

Failure to follow safety recommendations could

resultinpossibledamagetotheequipment,serious

personalinjuryordeath.

• Furnace must be installed in accordance with these

instructions, all applicable local building codes and the

current revision of the National Fuel Gas Code (ANSI

Z223.1/NFPA54),InstallationofOilBurningEquipment

(ANSI/ NFPA31) or the National Electric Code (ANSI/

NFPA70),theManufacturedHomeConstruction&Safety

Standard,Title24CFR,Part3280,orwhenthisstandard

isnotapplicable, the Standard for Manufactured Home

InstallationManufacturedHomeSites,Communitiesand

Setups(ANSI225.1).

• Useonlywithtypeofgasoroilapprovedforthisfurnace.

Refertothefurnaceratingplate.

• Install this furnace only in a location and position as

speciedonpage5.

• Provide adequate combustion and ventilation air to the

furnacespaceasspeciedonpage5andpage6.

• Provideadequateclearancesaroundtheventairintake

terminalasspeciedinTable1(page8).

• Combustion products must be discharged outdoors.

Connectthisfurnacetoan approved vent system only,

asspeciedonpage5andpage6.

• Never test for gas leaks with an open ame. Use

a commercially available soap solution to check all

connections.Seepages13.

• This furnace is designed to operate with a maximum

external pressure rise of 0.3 inches of water column.

Consult Table 4 (page 17), and the rating plate for the

proper circulating air ow and temperature rise. It is

important that the duct system be designed to provide

the correct ow rates and external pressure rise. An

improperlydesignedductsystemcanresultinnuisance

shutdowns,andcomfortornoiseissues.

• Thisfurnacemaynotbeused for temporary heatingof

buildingsorstructuresunderconstruction.

• The Commonwealth of Massachusetts requires

compliancewithregulation248CMR 4.00 and 5.00 for

installationofthrough–the–wallventedgasappliances

asfollows:

1. For direct-vent appliances, mechanical-vent heating

appliances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requirements

mustbesatised:

a.) Acarbonmonoxide(CO)detectorandalarmshallbe

placedoneachoorlevelwheretherearebedrooms.

The detector shall comply with NFPA 720 (2005

Edition) and be mounted in the living area outside

thebedroom(s).

b.) A (CO) detector shall be located in the room that

housestheapplianceorequipmentandshall:

•Be powered by the same electrical circuit as the

applianceorequipment.Onlyoneserviceswitchshall

powertheapplianceandthe(CO)detector;

•Havebatteryback-uppower;

•Meet ANSI/UL 2034 Standards and comply with

NFPA 720 (2005 Edition); and Approved and listed

by a Nationally Recognized Testing Laboratory as

recognizedunder527CMR.

c.) A Product-approved vent terminal must be used,

andifapplicable,aproduct-approvedairintakemust

be used. Installation shall be in strict compliance

with the manufacturer’s instructions. A copy of the

installationinstructionsshallremainwiththeappliance

orequipmentatthecompletionoftheinstallation.

d.) Ametalorplasticidenticationplateshallbemounted

attheexteriorofthebuilding,fourfeetdirectlyabove

the location of vent terminal. The plate shall be of

sufcientsize,easilyreadfrom a distance ofeight

feetaway,andread“GasVentDirectlyBelow”.

2. For direct-vent appliances, mechanical-vent heating

appliances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requirements

mustbesatised:

a.) A(CO)detectorandalarmshallbeplacedoneach

oorlevelwheretherearebedrooms.Thedetector

shallcomplywithNFPA720(2005Edition)andbe

mountedinthelivingareaoutsidethebedroom(s).

b.) The(CO)detectorshall:

•Belocatedintheroomthathousestheapplianceor

equipment;

•Behard-wiredorbatterypoweredorboth.

•ShallcomplywithNFPA720(2005Edition).

c.) A product-approved vent terminal must be used,

andifapplicable,aproduct-approvedairintakemust

be used. Installation shall be in strict compliance

with the manufacturer’s instructions. A copy of the

installationinstructionsshallremainwiththeappliance

orequipmentatthecompletionoftheinstallation.

GeneralInformation

Theinformationlistedbelowisforreferencepurposesonly

anddoesnotnecessarilyhavejurisdictionoverlocalorstate

codes.Alwaysconsultwithlocalauthoritiesbeforeinstalling

anygasappliance.

DuctSystems

• USandCANADA:AirConditioningContractorsAssociation

(ACCA) Manual D, Sheet Metal and Air Conditioning

Contractors National Association (SMACNA), or American

Society of Heating, Refrigeration, and Air Conditioning

Engineers(ASHRAE)FundamentalsHandbook

Electrical Connections

• US:NationalElectricalCode(NEC)ANSI/NFPA70

• CANADA:CanadianElectricalCodeCSAC22.1

Gas Piping & Gas Pipe Pressure Testing

• US:NFGCandNationalPlumbingCodes

• CANADA:NSCNGPIC

General Installation

• US: Current edition of the NFGC and the NFPA 90B. For

copies,contacttheNationalFireProtectionAssociationInc.,

Batterymarch Park, Quincy, MA 02269; or American Gas

Association,400N.Capitol,N.W.,WashingtonDC20001or

www.NFPA.org

• CANADA:NSCNGPIC.Foracopy,contactStandardSales,

CSA International, 178 Rexdale Boulevard, Etobicoke

(Toronto),Ontario,M9W1R3Canada

Safety

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

Standards,WarmAirHeatingandAirConditioningSystems

ANSI/NFPA90B.

• CANADA:CAN/CSA-B149.1and.2–M00NationalStandard

ofCanada.(NSCNGPIC)

OperationofFurnaceDuringConstruction

CAUTION:

Operatinggasfurnacesinconstructionenvironments

cancauseavarietyofproblemswithinthefurnace

and may significantly reduce the life or the

performanceofthefurnace.Thereforeoperating

thefurnaceduringconstructionisnotpermitted

andwillvoidthewarranty.

COMBUSTIONAIR&VENTING

REQUIREMENTS

WARNING:

CARBON MONOXIDE POISONING HAZARD

Failuretofollowthestepsoutlinedbelowfor

eachapplianceconnectedtotheventingsystem

being placed into operation could result in

carbonmonoxidepoisoningordeath.

Thefollowingstepsshallbefollowedwitheach

individualapplianceconnectedtotheventing

systembeingplacedinoperation,whileallother

appliancesconnectedtotheventingsystemare

not in operation:

1.Seal any unused openings in the venting

system.

2.Inspecttheventingsystemforpropersizeand

horizontalpitch,asrequiredintheNationalFuel

GasCode,ANSIZ223.1/NFPA54ortheCSA

B149.1,NaturalGasandPropaneInstallation

Codesandtheseinstructions.Determinethat

there is no blockage or restriction, leakage,

corrosionandotherdeciencieswhichcould

causeanunsafecondition.

3.Asfaraspractical,closeallbuildingdoors

andwindowsandalldoorsbetweenthespace

in which the appliance(s) connected to the

ventingsystemarelocatedandotherspaces

ofthebuilding.

4.Closereplacedampers.

5.Turn on clothes dryers and any appliance

notconnectedtotheventingsystem.Turnon

anyexhaust fans, suchas range hoodsand

bathroomexhausts,sotheyareoperatingat

maximum speed. Do not operate a summer

exhaustfan.

6.Follow the lighting instructions. Place the

appliance being inspected into operation.

Adjustthethermostatsoapplianceisoperating

continuously.

7.Test for spillage from draft hood equipped

appliances at the draft hood relief opening

after5minutesofmainburneroperation.Use

theameofamatchorcandle.

8.Ifimproperventingisobservedduringanyof

theabovetests,theventingsystemmustbe

correctedinaccordancewiththeNationalFuel

GasCode,ANSIZ223.1/NFPA54and/orCSA

B149.1,NaturalGasandPropaneInstallation

Codes.

9.After it has been determined that each

appliance connected to the venting system

properlyventswhentestedasoutlinedabove,

returndoors,windows,exhaustfans,replace

dampers and any other gas-red burning

appliancetotheirpreviousconditionsofuse.

Table1.MinimumClearanceRequirements

INSTALLATION CLEARANCES

CLOSET 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”

LEFT

SIDE

FRONT

RIGHT

SIDE

REAR

VENT

†

NOTES:

* ServiceClearance

AlcoveInstallations-Allow18in.minimumclearancefromfrontof

unittonearestwallorpartitionforservicing.

Closetinstallations-Requireareturnairgrillinstalledinthedooror

apartiallylouvereddooracrosstheopeningforproperaircirculation.

For clearances 6” or greater, the closet must have an open free

areaof235in

minimum.Forspecialclearancesbetween1”-5”,

requirementsarealouvereddoorwithaminimumof250in

(1613

)freearea.Afullylouveredclosetdoorisstronglyrecommended

forbothinstallationtypes.

MinimumInstallationClearances

• Access for positioning and servicing the unit must be

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 with

clearances listed in Table 1. The furnace must be

installedwithampleclearanceforeasyaccesstotheair

lter, blower assembly, burner assembly, controls, and

ventconnections.

• Locate and install this unit in position as specied on

page 8 & page 9. This unit is designed only for Indoor

installationsandshouldbelocatedwithconsiderationof

minimizingthelengthofthesupplyandreturnducts.

• Sufcient clearance for unobstructed airow through a

louvered door must be maintained in order to achieve

ratedperformance.Airreturnto the furnace must have

the minimum required total free area of 200 in

 (1290

)Mayalsoincludereturnairgrilleandframeassembly

(P/N902989)orwallmountgrille(P/N902999).

GeneralInformation

WARNING:

This furnace must be installed by a qualied

installingagencyandinaccordancewithapplicable

localcodesandordinancesthatgovernthistypeof

equipment.Failuretoproperlyinstallthefurnace,

baseassembly,andventingsystemasdescribed

hereinmaydamagetheequipmentand/orthehome,

cancreateareorasphyxiationhazard,violates

U.S.listingrequirements,andwillvoidthewarranty.

ThisfurnaceisNOTapprovedforinstallationwith

split system air conditioning. Use a NORDYNE

packagedairconditioningsystem.

• Instructionsfordeterminingtheadequacyofcombustion

airforaninstallationcanbefoundinthecurrentrevisionof

theNFGC(ANSIZ223.1/NFPA54).Theserequirements

areforUSinstallationsasfoundintheNFGC.Consult

localcodesforspecialrequirements.

• The requirements in Canada (B149.1) are structured

differently. Consult with B149.1 and local code ofcials

forCanadianinstallations.

The CMF3 Series furnace can draw combustion air from

outside the home (direct vent) or from the space being

conditioned.Thishighquality,directventfurnaceisusedfor

manufacturedhousingapplications.ItiscertiedtotheUL307

standards(UL307-Aforoilmodels;UL307-Bforgasmodels).

TheCMF3furnaceisavailableinpowergas(PGmodels)

orpoweroil(POmodels)andcanbeconvertedfrompower

oil to power gas, and vice versa. The power gas models

aredesignedfor operation with either natural or propane

(LP) gas. The ring rate of the CMF3 Convertible Series

canbeeld-installed(usingacertiedconversionkit)bya

qualiedservicetechnician.Refertopage14forconversion

information.

CAUTION:

Exhaustfans,clothesdryers,replacesandother

appliances that force air from the house to the

outdoors can create a negative pressure inside

thehouse,resultinginimproperfurnaceoperation

orunsafeconditionssuchasamerollout.Itis

imperative that sufcient air exchange with the

outdoorsisprovidedtopreventdepressurization.

Additional information about how to test for

negativepressureproblemscanbefoundinthe

NFGC.

CombustionAirQuality

CAUTION:

Combustionairmustnotbedrawnfromacorrosive

atmosphere.

Provisionsforadequatecombustionairandventilationair

must be in accordance with the ANSI Z223.1/NFPA 54,

(NationalFuelGasCode),ANSI/NFPA31(InstallationofOil

BurningEquipment),andallapplicablelocalcodes.

The installation of the furnace must allow for adequate

supplyoffreshairforcombustion.Airopeningsontopof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,

theameroll-outswitchwillopenandshutoffthegassupply

totheburners.

IMPORTANT NOTE

Thissafetydeviceisamanuallyresetswitch.DONOT

install jumper wires across 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specied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

commoncommercialandhouseholdproducts:

Permanentwavesolutions

Chlorinatedwaxesandcleaners

Chlorinebasedswimmingpoolchemicals

Watersofteningchemicals

De-icingsaltsorchemicals

CarbonTetrachloride

Cleaningsolvents(perchloroethylene)

Printinginks,paintremovers,varnishes,etc.

HydrochloricAcid

Cementsandglues

Antistaticfabricsofteners

Masonryacidwashingmaterials

Whendrawingcombustionairfromunderneaththehome,a

ventorductofatleast18in

offreeareashouldbeinstalled

outside and completely unobstructed. When using the

combustionairduct,makesureitextendsthroughtheoor.

DirectVentFurnaces

Direct Vent furnaces draw combustion air directly from

the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connedorunconnedspace.

Thecombustionairhoseisprovidedandmustbeusedfor

directventapplications.

OnlyforspecialCB-200Acottagebaseinstallationscanthe

CMF3furnacedrawscombustionairfromtheconditioned

space. The CB-200A cottage base is an accessory item

thatcanbepurchasedseparately.Refertothereplacement

partslistingprovidedwiththefurnacetoorderthecottage

basekit.Followthe instructionsprovidedwiththe kitsfor

properinstallation.

When unsure about combustion air supply availability, a

directventsystemshouldbeused.Forsmallrooms,conned

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.

Forallmanufacturedhousingapplications,theCMF3furnace

mustbeventedusingtheSRJseriesroofjackasshownin

Figure1.Theinstructionsforselectingtheproperroofjack

foryourinstallationaredetailedlaterintheseinstructions.

VentilaireIIIorIV(AccessoryItem)

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.

The Ventilaire air quality packages are available to meet

theventilationrequirementsasoutlinedinH.U.D.Standard

Part3280.103 (b)(2).Thesepackagesintroduceoutdoor

air into the living space during furnace blower operation.

TheVentilAireIValsoservestoexhaustmoistand/orhot

airfromtheatticspace.SeeFigure2fortypicalinstallation.

Completeinstallationinstructionsaresuppliedwitheachair

qualitypackage.

VENT PIPE

3 FEET

MIN.

ROOF JACK

ASSEMBLY

ROOF CAP

ASSEMBLY

FLEX

DUCT

CEILING TRIM

COLLAR

CONNECTOR

DRAW BAND

FURNACE

DRAW

BAND

57”

Figure1.TypicalInstallation

VentilAireIII

VentilAireIV

Figure2.VentilAireIII&IV

CIRCULATING AIR REQUIREMENTS

WARNING:

Allsupplyductsmustbesecuredtothefurnace

with sheet metal screws and adequately sealed.

Whensupplyairisprovidedthroughthebottom

oftheunit,thejointbetweenthefurnaceandthe

plenummustbeairtight.

Thesurfacethatthefurnaceismountedonmust

providesoundphysicalsupportofthefurnacewith

nogaps,cracksorsaggingbetweenthefurnace

andtheoororplatform.

Supply air ducts must not be connected to any

otherheat producingdevice such as a replace

insert,stove,etc.Thismayresultinre,explosion,

carbon monoxide poisoning, personal injury, or

propertydamage.

Plenums&AirDucts

Thisunitisdesignedonlyforusewithabottomsupplyduct

andmustbeinstalledinaccordancewiththestandardsofthe

NationalFireProtectionAssociationStandardforInstallation

of Air Conditioning Systems (NFPA 90A), Standard for

InstallationofResidenceTypeWarmAirHeating and Air

ConditioningSystems(NFPA90B),andallapplicablelocal

codes.NFPApublicationsareavailablebywritingto:National

FireProtectionAssociation,BatterymarchPark,Quincy,ME

02269orvisitwww.NFPA.orgontheinternet.

• Designtheairductsaccordingtomethodsdescribedby

theAirConditioningContractorsofAmerica(ACCA).

• Airductsmustbealuminum,tinplate,galvanizedsheet

steel, or other approved materials for outlet air ducts.

Snap-Lock or Pittsburgh-Lock seams are preferred. All

other types of seams must be made tight to prevent

leakage.

• It is good practice to seal all connections and joints

with industrial grade sealing tape or liquid sealant.

Requirements for sealing ducts vary from region to

region.Consultwithlocalcodesforrequirementsspecic

toyourarea.

• Gaspipingmustnotruninorthroughanyoftheairduct

system.

SupplyAirConnections

• 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

to the heated space by duct(s) secured to the furnace

casing,runningfulllengthandwithoutinterruption.

• Ductsystemmustbedesignedsothatnosupplyregisters

arelocatedinductsystemdirectlybelowthefurnace.

Dampers

Anautomatedshutoffdamperisrequiredwhenthehomeis

airconditionedbyaself-containedunit.Adamperisrequired

to prevent chilled air from owing over the furnace heat

exchanger.Thisdamperisdesignedtotinthefeederduct

cavity,directlyunderthefurnace.Forproperinstallation,refer

totheinstructionsprovidedwiththedamper.SeeTechnical

SalesLiteratureonline.

UnconditionedSpaces

All duct work passing through unconditioned space must

be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followinginstructions

mayresultinre,asphyxiationorcarbonmonoxide

poisoning.

Forproperaircirculation,closetinstallationsrequireareturn

airgrillinstalledinthedoororsidewallthatexchangeswith

thelivingareaofthehomeasshowninFigure3.Apartially

louvereddoormayalsobeusedacrosstheopening.Return

air openings should not be located to draw air directly

fromabathroom.Grillesplacedinasidewallrequirea6”

clearancefromthewalltothefurnacesothattheairmay

enterthefrontgrilleofthefurnace.Inaddition,allreturnair

systems,includingtheoorandceilingsystems,mustmeet

thefollowingconditions:

• The return air opening, regardless of its location in the

closet, must not be smaller than size specied on unit

data label. If located in the oor, the opening must be

provided with a means of preventing its inadvertent

closurebyatobject(s)placedovertheopening.

• The return-air opening into the closet, regardless of its

location,musthaveanopenfreeareaof200in

(1290

)minimum.

• The cross-sectional area of the return duct system (in

oororceiling)leadingintotheclosetmustnotbeless

than200in

(1290cm

• The total free area of the openings in the oor or the

ceilingregistersservingthereturnairductsystemmust

notbenotlessthan300in

(1935cm

).

• Materialslocatedinthereturnductsystemshallhavea

amespreadclassicationof200orless.

• Noncombustiblepanshavingoneinchupturnedanges

are located beneath openings in a oor return duct

system.

• Hollowspacesusedasductsorplenumsforenvironmental

airmaycontainmineral-insulatedmetalsheathedcable,

aluminumsheathedcable,electricalmetallictubing,rigid

metalconduit,exiblemetalconduit(nottoexceed4ft),

ormetal-cladcables.Wiringmaterials,xtures,aretobe

suitablefortheexpectedambienttemperaturestowhich

theywillbesubjected.

• Thenegativepressureintheclosetmustnotbelessthan

minus 0.05 inches water column with the closet door

closed and the fan operating at high speed. A reading

below minus 0.05 inches indicates a dirty lter or a

restrictedreturnairsystem.

• For oor return systems, the manufactured housing

manufacturerorinstallershallafxaprominentmarking

onorneartheappliancewhereitiseasilyreadwhenthe

closetdoorisopen.Themarkingshallread:“CAUTION,

HAZARD OF ASPHYXIATION. DO NOT COVER

OR RESTRICT FLOOR RETURN AIR OPENING.”

or equivalent. NOTE: This label is supplied with the

instructionmanualineachfurnace.

• For closet installation with less than 6” front clearance,

butnotlessthan1”,alouvereddoormustbeusedhaving

aminimum200in

(1290cm

)freeareaopeningdirectly

inlinewithopeningsinthefurnacedoor.Afullylouvered

doorhavingtheminimumfreeareaisalsopermittedifthe

fronttoleranceisnotlessthan4”.Adjustductregistersto

obtain a temperature rise within the range specied on

thefurnacenameplate.

FURNACE INSTALLATION

NOTE: 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. Only qualied HVAC technicians should

installthisfurnace.

GeneralInformation

TheCMF3furnaceisdesignedonlyforindoorinstallations

andcanbereadilyconnectedtothehighstaticductsystem

ofahome.Unitsareapprovedforsinglemobile/modular/

manufactured structures in freestanding/closet/alcove

downowonlycongurations.

Thisappliancewillprovidemanyyearsofsafeanddependable

comfort, providing it is properly installed and maintained.

Abuse, improper use, and/or improper maintenance can

shortenthelifeoftheapplianceandcreateunsafehazards.

Pleasereadallinstructionsbeforeinstallingtheunit.

Approvedinstallation, operation, and maintenance of this

appliancemustbeinaccordancewiththelistedspecications

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.

BeforeYouInstallthisFurnace

√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.Claimsfordamage(apparentorconcealed)should

beledimmediatelywiththecarrier.

√Checktheelectricalsupplyandverifythepowersupply

is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tohandle

thestaticpressuredropofthelterandductwork.

Figure3.Closet Installation

200 Sq. In. Minimum Free

Area in a Door or Wall

LocatingtheUnit

• Surveythehomeslayouttodeterminethebestlocation

for installing the unit. Consideration should be given to

availabilityofelectricpower,serviceaccess,andnoise.

• The dimensions of the room or alcove must be able

to accommodate the overall size of the unit and the

installation clearances in Table 1 (page 4). Physical

dimensionsforthisfurnaceareshowninFigure17(page

24).

• Theunitmustbeleveledatinstallationandattachedtoa

properlyinstalledductsystem.

• Thesurfacethatthefurnaceismountedonmustprovide

soundphysicalsupportoftheunit.

MA-200 Base Installation

TheMA-200baseisdesignedforO.E.M.andreplacement

installationoftheCMF3seriesfurnace.Thewarmairduct

systemshouldbedesignedsotheductstaticpressureexternal

tothefurnacedoesnotexceedthestaticpressurelistedon

thefurnacedatalabel.Itisrecommendedthatalterwitha

MERVratingnogreaterthan10beinstalled.

Floorcut-outsmustbecarefullylocatedtoavoidmisalignment

ofthefurnaceandairduct.

1. Usingthebasepan(Figure4)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the

ductopeningtobeusedandmarkthe2-1/4”x7-1/4”

openingontheooralso.

2. Cutall4sidesoftheFeederDuctopening1”largerthan

thedrawncutout.NOTE:Cuttingtheopeningto14-1/8”

x14-1/8”willallowtheangesontheundersideofthe

basepantotintheopening.Cutallthewaythrough

theinsulationandbottomboardsothatthecombustion

airductisunobstructedtooutsideair.

3. If applicable, cut the 2 1/4” x 7 1/4” opening for the

combustionairduct.NOTE:Cuttheopeningfortheduct

about1/8”largerthantheactualcutoutdrawn.Thiswill

allowsomeclearancewheninstallingthefeederduct.

4. Drilla1”diameterholeforthefuellinethroughtheoor

andbottomboardtotheoutside.NOTE:Fuellinesare

notsuppliedwiththefurnace.Theyshouldbeinstalled

tocomplywithallapplicablecodes.

5. Droptransitionduct(Figure5)upsidedownthroughthe

ooropeningand centerthetopof thefeederductin

14-1/8”x14-1/8”ooropening.Usingthefeederductas

aguide,markandcuta12”x12”openinginthesupply

duct.

6. Insertthefeedertabsintothemainductandbendthem

over tightly so that the main duct edges are trapped

betweenangesandtabs.NOTE:Metaltapemaybe

be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the

basepan(Figure6).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metaltoallowaoneinchangeoverthetopofthe

basepanandsealthatangewithmetaltape.

 NOTE:Ifusinga“V”or“U”-boxcrossoversystem,use

manufacturersinstructionsforinstallationdetails.

Figure4.MA-200 Base Pan

FRONT

Combustion Air

Knock-outs

(7-1/4” X 2-1/4”)

Feeder Duct

Opening

Flue

Location

24 1/8

8 3/8

12 1/8

9 1/8

18 1/4

Figure5.Transition Duct

Heater Duct Below Joists

Flange

Bend

Over Tabs

Base

Floor

Joists

Slit 4 Corners

Bend Down 4 Sides

Figure6.FeederDuctInstallation

Heat Duct Below Joists

Base

Feeder Duct

Floor

Joists

Cut This Line

Bend Over

Along This Line

InstallingtheFurnaceonanMA-100Base

1. Carefully lift the furnace over the universal base pan

andsetintoposition.Avoiddamagingthefeederduct

assembly and combustion air adapter, if present.

NOTE:Makesurethefurnaceispositionedagainstthe

backendofthebase.

2. Openthefurnacedoorandfastenthefurnacetothebase

using#8x1/2”sheetmetalscrews.

3. Using the provided hose clamp, secure the exible

combustionairtubingfromtheburnertothecombustion

airadapter.

CombustionAirDuct/PipeInstallation

The CMF3 furnace must draw the combustion air from

outside(exceptforspecialinstallations)andrequiresusing

the2”X7”rectangularcombustionairductprovidedintheMA

seriesbasekitorthedirectventkit.Ifusingtherectangular

combustionairduct,followthestepsbelow:

1. Install the combustion air duct through the selected

knockoutinthebase.Fordirectventapplications,the

rearknock-outinthefurnacebasecannotbeused.

2. Installthecombustionairadapter(afterthecombustion

air duct has been positioned) to transition the 2”X7”

openingofthecombustionairducttothe2”diameterof

theburnerexibletubing.NOTE:Adapterisincludedin

theMAseriesbasekits.Forretrotapplicationsinwhich

theMAseriesbaseisalreadyinstalled,thecombustionair

adaptercanbeorderedasakit.RefertotheReplacement

PartsListformoredetailsonorderingthiskit.

3. Securetheadapterwithwoodormetalfasteners(eld

supplied),dependinguponyourinstallation.NOTE:Make

sure the gasket for the adapter is positioned properly

beforeinstallingtheadapter.

4. Attachtheexiblehosefromtheburnertothecombustion

airadapterusingtheprovidedhoseclamp.

Figure7.MA-100UniversalBase,BottomPanel

12 1/8

Feeder Duct

Opening

18 1/4

24 1/2

12 1/8

FRONT

Combustion Air

Knock-outs

(7-1/4” X 2-1/4”)

InstallingtheFurnaceonanMA-200Base

1. Carefullyliftthefurnaceoverthebasepanandsetinto

position.Theangeonthebackofthefurnaceshould

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therear

angedropsintothe channel at therearofthebase.

NOTE:Donotdamage the combustionairadapter,if

present,whilepositioningtheunit.Makesurethefurnace

engagesthetabsontherearangeofthebase.

3. Opentheaccessdoorandfastenthefrontofthefurnace

andthebasetotheoorwith#8x1/2”sheetmetalscrews.

4. Using the provided hose clamp, secure the exible

combustionairtubingfromtheburnertothecombustion

airadapter.

MA-100 Universal Base Installation

The MA-100 base is designed primarily for replacement

installation of the CMF3 series furnace where the

manufactured home duct system may be too small or

restrictivefor proper air ow. The MA-100 base provides

approximately4inchesofadditionalplenumspacebefore

thedischargeairenterstheductsystem.SeeFigure7.

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theductopening

tobeused.Thenmarkthe2-1/4”x7-1/4”openingonthe

oor.

2. Cutall4sidesoftheFeederDuctopening1”largerthan

thedrawncutout.NOTE:Cuttingtheopeningto14-1/8”

x14-1/8”willallowthefourangesontheundersideof

thepaneltotintotheopening.Cutallthewaythrough

theinsulationandbottomboardsothatthecombustion

airductisunobstructedtooutsideair.

3. If applicable, cut the 2 1/4” x 7 1/4” opening for the

combustionairduct.NOTE:Cuttheopeningfortheduct

about1/8”largerthantheactualcutoutdrawn.Thiswill

allowsomeclearancewheninstallingtheFeederDuct.

4. Drilla1”diameterholeforthefuellinethroughtheoor

andbottomboardtotheoutside.NOTE:Fuellines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

(Figure5)upsidedownthroughtheooropeningand

centerthetopofthefeederductin14-1/8”x14-1/8”oor

opening.

6. Usingthefeederductasaguide,markandcuta12”x

12”openinginthesupplyduct.Removethebaseand

transitionfeederduct;thencuttheopeningintothesupply

duct.

7. Insertthefeedertabsintothemainductandbendthem

overuntilthemainductedgesaretrappedtightlybetween

anges and tabs. NOTE: Metal tape may be used 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metaltoallowone

inchangeoverthetopofthebaseandsealthatange

withmetaltape.

9. Securethetoppaneltotheoorwith2screwsthrough

thefrontange.NOTE:Ifusinga“V”or“U”-boxcrossover

system,use manufacturersinstructionsforinstallation

details.

SRJRoofJackInstallation

Requiredceilingandroofcut-outopeningsmustbeaccurately

locatedtopreventhazardousmisalignmentofthefurnace

and roof jack. Figure 8 displays a typical installation for

maufacturedhousingapplications.RefertoFigure9(page

12)todetermineappropriateSRJroofjackandaccessories

requiredforyourinstallation.InstallonlySRJseriesroofjack

asspeciedonthefurnacelabel.

NOTE 1:Dependingon theslopeofthe roof,aroofjack

adaptormaybeneeded.

NOTE 2:Themaximumnumberofexternalextensionkits

allowedperinstallationis2.

WARNING:

• Theroofjackandventpipeasdeterminedfrom

thechartinFigure9mustbeapplied.

• Theindicatinglinenearthebottomoftheroof

jackmustextendbelowthenishedceiling.

• Theventpipemustbeattachedtothefurnace

uecollarwithprovidedsheetmetalscrews.

• DONOTinstallanyelbows(adjustableornon-

adjustable) or a stack damper in the venting

system.

1. Measureandcut an81/4”diameter holethroughthe

roofandceilingthatisalsoin direct line with theue

connectiononthetopofthefurnace.

2. Centertheadaptoropeningovertheroofopening.Use

sealantorcaulkingundertheadaptor.Useroongnails

orscrewsonwoodconstructionorsheetmetalscrews

onmetalroofs.

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nishedceilingasindicatedonthebarrel.

Usesealantorcaulkingontherooforadaptortoseal

undertheashingoftheroofjackassembly.

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

screwinthetopofthefurnaceuepipe.

6. Twisttheventpipetolockthetwopipestogetherand

tightenthescrew.Alljointsandconnectionsshouldbe

inspectedbeforestartupofthefurnace.SeeFigure10

&Figure11(page12).

7. Fastentheceilingtrim/restopplatesaroundtheupper

barrelwithfournailsorwoodscrews(eldsupplied).

NOTE:ThetopsectionofroofjackmodelsSRJ-3,-4,

and-5canberemovedfordwellingtransit.Ifthetopis

removed,remainingopeningsmustbesealedfromrain,

debris,etc.,untilthetopisreinstalled.Aplasticaccessory

capmustbefastenedtothelowerroofjacksectionusing

thesamescrewssecuringtheroofjackcapassembly.

IMPORTANT NOTE:

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.

DamperInstallation

Anautomaticshut-offdamperisavailable(seereplacement

partslist).Anautomatedshutoffdamperisrequiredwhen

thehomeis airconditionedbyaself-containedunit.This

damperisdesignedtotinthefeederductcavity,directly

underthefurnace.Adamperisrequiredtopreventchilled

airfromowingoverthefurnaceheatexchanger.Forproper

installation,refertotheinstructionsprovidedwiththedamper.

Flashing

Barrel

Ceiling Plate

Vent

Ventilation

Knock-Out

DUCT

CONNECTOR

Return Air

Grille and

Filter

Power Supply

Connection

Access

Door

Base Pan

Fuel Line

Feeder Duct

Combustion

Air Duct

FURNACE

ASSEMBLY

ROOF JACK

ASSEMBLY

Combustion Air

Adapter (Not Shown)

is to be Installed

Over Combustion

Air Duct

Figure8.TypicalFurnaceInstallationfor

ManufacturedHousingApplications

RA-S4

RA-S3

RA-S2.5

4/12

3/12

2-1/2/12

None

Flat

NOTES:

SRJ1 & SRJ2 Models are one piece construction

SRJ3, 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 Adaptor

Model No.

When roof pitch is:

1/2 Minimum

Furnace

CMF Series

57"

And Ceiling

Height is:

Add Suffix

For Vent Pipe

-28

7'6"

-34

-40

Ceiling Trim Plates

When Ceiling

Cavity is:

Use Roof Jack

Model 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, & SRJ5

25" Removable All -C Models

Figure9.SelectionofRoofJack&AccessoriesChart

Figure11.VentPipeInstallation

Flue Pipe

of Furnace

Vent Pipe

Tu rn To Lock-

Tighten Screw

Insert Sliding Pipe

Fasten Ceiling

Trim Plates

Ceiling

Roof

Roof Jack Adaptor

Install With Line

Below Ceiling

Remove three screws

to separate two piece

models; replace with

protective cap for

transit only

Fasten roof flashing to adaptor

or flat roof; apply sealant or

caulking underneath

Fasten adaptor to

sloped roof; apply

sealant or caulking

underneath

Figure10.RoofJack

FUEL CONNECTIONS

Gaspiping-PGSeriesOnly

WARNING:

FIRE OR EXPLOSION HAZARD

• Failuretofollowsafetywarningsexactlycould

resultinseriousinjuryorpropertydamage.

• Installationandservicemustbeperformedby

aqualiedinstaller,serviceagencyorthegas

supplier.

• Donotstoreorusegasolineorotherammable

vaporsandliquidsinthevicinityofthisorany

otherappliance.

WHAT TO DO IF YOU SMELL GAS

• Donottrytolightanyappliance.

• Donottouchanyelectricalswitch;donotuse

anyphoneinyourbuilding.

• Leavethebuildingimmediately.

•Immediately call your gas supplier from a

neighbor’s phone. Follow the gas supplier’s

instructions.

• Ifyoucannotreachyourgassupplier,callthe

redepartment.

• Allgaspipingmustbeinstalledincompliancewith

localcodesandutilityregulations.Intheabsenceof

localcodesthegaslineinstallationmustcomplywith

thelatesteditionoftheNationalFuelGasCode(ANSI

Z223.1)or(CAN/CSAB149.1or.2)InstallationCodes

andHUDGasPipingSystems(3280.705).

• Some local regulations require the installation of a

manual main shut-off valve and ground joint union

externaltothefurnace.Theshut-offvalveshouldbe

readilyaccessibleforserviceand/oremergencyuse.

Consultthelocalutilityorgassupplierforadditional

requirementsregardingplacementofthemanualmain

gasshut-off.

• Gas piping must never run inorthroughairducts,

chimneys,gasvents,orelevatorshafts.

• Compounds used on threaded joints of gas piping

mustberesistanttotheactionsofLPpropanegas.

• Themaingasvalveandmainpowerdisconnecttothe

furnacemustbeproperlylabeledbytheinstallerin

caseemergencyshutdownisrequired.

• Flexiblegasconnectorsarenotrecommendedforthis

typeoffurnacebutmaybeusedifallowedbylocal

jurisdiction. Only new exible connectors may be

used.Donotuseaconnectorwhichhaspreviously

servicedanothergasappliance.

• Adriplegshouldbeinstalledintheverticalpiperun

totheunit.

TheCMF3furnacemaybeinstalledwithgasentrythrough

the bottom of the furnace. When installing the gas line,

connectaseparategaslinefromthegasmetertotheburner

withamanualshut-offvalveinstalledinthesupplylineat

thefurnace.Alwaysusenewcleanpipingandroutetheline

inaneasilyaccessiblemanner.Thepipingandthreading

mustbefreefromcuttingburrsanddefects.Thelinemust

bedurable,substantial,andgastight.Anadditionalmain

manualshut-offvalvemaybeinstalledinthegassupplyline

toshut-offthemainfuelsupply,ifdesiredbythehomeowner

orrequiredbylocalcodes.

Thepropergassupplylinesizecanbedeterminedbyreferring

tothelatesteditionoftheNationalFuelGasCode(NFGC)

andHUDGasPipingSystems(3280.705).Blackpipeisthe

mostpracticalfornaturalgas,becauseofthelargersizes

required. Copper tubing with an internal coating of tin is

recommendedforusewithpropane(LP)gasinstallations.

LeakCheck

WARNING:

ELECTRICAL SHOCK, FIRE OR

EXPLOSION HAZARD

Failuretofollowsafetywarningsexactlycould

resultinseriousinjuryorpropertydamage.

Improper servicing could result in dangerous

operation, serious injury, death or property

damage.

• Beforeservicing,disconnectallelectricalpower

tofurnace.

• Whenservicingcontrols,labelallwiresprior

todisconnecting.Reconnectwirescorrectly.

• Verifyproperoperationafterservicing.

Afterthegaspipingtothefurnaceiscomplete,allconnections

mustbetestedforgasleaks.Thisincludespipeconnections

atthemaingasvalve,emergencyshutoffvalveandexible

gasconnectors(ifapplicable).Thesoapandwatersolution

canbeappliedoneach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.

IMPORTANT NOTE:

Whenpressuretestinggassupplylinesatpressures

greater than 1/2 psig (14 inch W.C.), the gas supply

pipingsystemmustbedisconnectedfromthefurnace

topreventdamagetothegascontrolvalve.Ifthetest

pressureislessthanorequalto1/2psig(14inchW.C.),

closethemanualshut-offvalve.

HighAltitudeApplication

Installation of this furnace at altitudes above 2,000 feet

shallbeinaccordancewithlocalcodes,orintheabsence

oflocalcodes,theNationalFuelGasCode,ANSIZ223.1/

NFPA54orNationalStandardofCanada,NaturalGas&

PropaneInstallationCodeCSAB149.1.Pleaseconsultyour

localcodeauthority.

WARNING:

Thereductionofinputratingnecessaryforhigh

altitudeinstallationmayonlybeaccomplishedwith

factorysuppliedorices.Donotattempttodrillout

oricesintheeld.Improperlydrilledoricesmay

causere,explosion,carbonmonoxidepoisoning,

personalinjuryordeath.

TheCMF3furnaceisshippedfromthefactorywithitsorices

andgasregulatorsettingfornaturalgasoperationatsea

levelaltitudes.At2,000feet,theNFGCrequiresthatthis

appliancebederated4%foreach1,000feetofaltitude.For

example,theinputneedstobereduced8%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.

Highaltitudeconversionforthisfurnacerequiresreducing

theoricesizeordecreasingthemanifoldpressure.When

decreasingthemanifoldpressure,thepressuremustnotbe

setbelow3.2inWC.Ifthepressureneedstobesetbelow

3.2inWCtoachieveproperderation,thenchangetheorice

sizeandraisethemanifoldpressurebackto3.5inWC.

Afterchangingtheregulatorpressureortheorices,itis

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.

IMPORTANT NOTE:

Observetheactionoftheburnerstomakesurethereis

noyellowing,liftingorashbackoftheame.

ConvertingtoLPGas

TheCMF3furnaceisshippedfromthefactoryforusewith

naturalgasbutcanbeconvertedtouseliquidpropanegas.

UsethefollowingprocedureandFigure18forconverting

thegasburner.

1. SetthermostattoOFF.

2. Turnoffallpowertothefurnace.

3. Openfurnacedoorandlocatethegasvalve.

4. PushinonthegasknobandturnittoOFF.

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.RemoveboltssecuringU-shapedmanifoldplatetoorice

assembly.

11.Removethemainoriceandreplaceitwiththecorrect

LPfueloriceasshowninTable2.Refertotherating

plateonthefurnacetodeterminetheringrateforyour

application.NOTE:Iftheringrateofyourfurnacehas

beenconverted,make suretheappropriateLPorice

forthenewring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.Openthemanualshut-offvalveandfollowtheOperating

Instructionsoutlinedonpage18.

Oilpiping-POSeriesOnly

Thefollowingproceduresarerecommendedasgoodpractice.

However,requirementsoflocalcodesandordinances,H.U.D.

ManufacturedHomeandSafetyStandardsorNationalFire

ProtectionAssociationmustbesatised,wheretheyapply,

foranapprovedinstallation.

• Use a tank capacity suitable for the application with a

weatherproof,cappedllopeningandshieldedventtolet

airinasfuelisused.NOTE:Theinsideofthetankmust

becleanbeforelling.Allwater,rust,sediment,andother

foreignmattermustbeushedout.

• If a two pipe system is used or if oil is taken from the

bottom of the tank, a lter is recommended. A manual

shut-offvalvemayalsobeusedonasinglepipeortwo

pipesystem.NOTE:Localcodesmaydictatethespecic

installationrequirements.

• Afuelortankgaugeisrecommendedforeasychecking

ofthefuellevel.Checkthegaugeusingadipstick.

• Locatethestoragetankconvenientlynearthehome.For

above ground fuel tank installations, the tank may rest

threetofourinchesofftheground.Fueltanksmayalso

beburiedifproperlycoatedtoresistcorrosion.Forbelow

groundfueltankinstallations,theverticaldimensionfrom

thebottomofthetanktothefuelpumpmustnotexceed

10feet.Keepthetanklledespeciallyinthesummerto

reducetheaccumulationofcondensation.

FuelLineHook-Up:SingleLineSystem

Thesinglelinesystemishighlyrecommendedwhenvertical

lift,frombottomoftanktopump,islessthan8feet.Asingle

linehookuphastheadvantageofcostinglessandgiving

quieteroperation.

Table2.Natural&LPGasOrices

BURNER

DESIGNATION

FIRING RATE

INPUT (BTUH)

NATURAL GAS

ORIFICE NUMBER

NATURAL GAS

TIME TO CONSUME*

LP GAS

ORIFICE

NUMBER

LP GAS

TIME TO CONSUME**

GasGun-60-DI-S 60,000 27 60 43 148

GasGun-70-DI-S 70,000 22 52 41 126

GasGun-75-DI-S 75,000 20 48 40 120

*Timesarebasedonnaturalgasatanaverageof1,000BTUpercubicfoot,aburnermanifoldpressureof3.5inWC,and1CFM.

**TimesarebasedonLPgasatanaverageof2,500BTUpercubicfoot,aburnermanifoldpressureof10inWC,and1CFM.

Figure12.LP & Natural Gas Conversion

Orifice

Inlet

U-Shaped

Manifold

Regulator

Converter

Gas Control Knob

FuelLineHook-Up:TwoLineSystem

Twolinesystemsshouldonlybeusedwhentheverticallift

exceeds8feet.

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

Procedure.

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lineto

thetank,using3/8”O.D.coppertubingor1/4”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shouldextendnot

morethan8”insidethetank.

Hook-UpProcedure

1. Use3/8”O.D.coppertubingforthefuelline.Captheend

withtapetokeepoutdirtwhilethelineisbeingrouted.

SeeFigure13.

2. Installduplexbushingfortwo3/8”linesinthetoptting

ofthetank.

3. Insertoneendofthetubingthroughtheduplexbushing

until it is 3” to 5” from the bottom drain. Tighten the

bushing.

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

Makeallbendsgradualandavoidkinksthatmightrestrict

oilow.

5. Opentheburneraccessdoor.Connecttheoillinetothe

intakeportonthepump.Tightenotherportplugsonthe

pump.

6. Makesuretheoillineisairtight!NOTE:Airleakscancause

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.Form

thetubeintoaninverted“U”toserveasavent.

EliminatingAirLeaks

To eliminate problems caused by air in the oil line, all

connectionsinthe oilsupplylineandallplugs,nuts, and

ttingsonthepumpmustbeairtight,includingthenutthat

coversthepressureadjustment.Itisimportantthatthehook-

upbedonewithagoodaringtool.

Figure13.RecommendedTankHook-Up

200-300GallonTank

Drain

End of Oil Supply Line

3" to 5" Above

Bottom Drain

Guide pipe

Gauge

Vent with

Cap

2" Duplex

Bushing

2" Fill

3/8" Oil Supply Line

Note: Additional venting may

be required if tank is filled rapidly.

FuelOilType

GradeNo.1maybeusedwheretheoilsupplyissubject

tolowtemperatures.DonotusefueloilheavierthanGrade

No.2.Biodieselblendsupto5%(B5)arealsoacceptable.

IMPORTANT NOTE:

DO NOT USE GASOLINE, CRANKCASE OIL, OR ANY

OILCONTAININGGASOLINE.

WARNING:

Failuretokeepsupplyoilcleanmaycausefailureof

certaincomponentssuchasthefuelpumpgears,

checkvalve,shaftseal,orburnernozzlewhichmay

resultinaburnerre.

ELECTRICAL CONNECTIONS

WARNING:

ELECTRICAL SHOCK, FIRE OR

EXPLOSION HAZARD

Failuretofollowsafetywarningsexactlycould

resultinseriousinjuryorpropertydamage.

Improper servicing could result in dangerous

operation, serious injury, death or property

damage.

• Beforeservicing,disconnectallelectricalpower

tofurnace.

• Whenservicingcontrols,labelallwiresprior

todisconnecting.Reconnectwirescorrectly.

• Verifyproperoperationafterservicing.

• Electrical connections must be in compliance with

all applicable local codes and ordinances, and with

the current revision of the National Electric Code

(ANSI/NFPA70).

• For Canadian installations, the electrical connections

and grounding shall comply with the current Canadian

ElectricalCode(CSAC22.1and/orlocalcodes).

Pre-ElectricalChecklist

√Verify the voltage, frequency, and phase of the supply

sourcematchthespecicationsontheunitratingplate.

√Verifythattheserviceprovidedbytheutilityissufcient

tohandletheadditionalloadimposedbythisequipment.

Refer to the unit wiring label or Table 3 (page 19) for

properhighandlowvoltagewiring.

√Verifyfactorywiringisinaccordancewiththeunitwiring

diagram(Figure18,page25).Makesurenoconnections

loosenedduringshippingorinstallation.

LineVoltage

• Anelectricaldisconnectmustbelocatedwithinsight

ofandeasilyaccessibletotheunit.Thisswitchshall

be capable of electrically de-energizing the unit. See

unitdatalabelforproperincomingeldwiring.Anyother

wiringmethodsmustbeacceptabletoauthorityhaving

jurisdiction.

• Itisrecommendedthat thelinevoltageto theunitbe

suppliedfromadedicatedbranchcircuitcontainingthe

correctfuseorcircuitbreakerfortheunit.SeeTable3

forunitspecications.

• Overcurrentprotectionmustbeprovidedatthebranch

circuitdistributionpanelandsizedasshownontheunit

ratinglabelandaccordingtoapplicablelocalcodes.

• Useonlycopperwireforthelinevoltagepowersupply

tothisunit.Use14-2TypeNMcableor codeagency

listed conduit and a conduit connector for connecting

thesupplywirestotheunit.

• Ifreplacinganyoftheoriginalwiressuppliedwiththeunit,

thereplacementwiremustbecopperwireconsistingof

thesamegaugeandtemperaturerating.

• Provide power supply for the unit in accordance with

theunitwiringdiagram, andtheunitrating plate.The

installershouldbecomefamiliarwiththewiringdiagram/

schematicbeforemakinganyelectricalconnectionsto

theunit.SeeFigure18(page25).

Wiring Connections

1. Opentheappliancedoorforaccesstothecontrolbox.

2. Removethecontrolboxcover.

3. Connecttheblackwireofthefurnacetotheblackwire

ofthepowersupplycable.

4. Connectthethewhitewireofthefurnacetothewhite

wireofthepowersupplycable.

5. Connectthegroundwireofthepowersupplycableto

thegreenscrewinthecontrolboxofthefurnace.

6. Verifyallelectricalconnectionsaresecurelyconnected.

7. Replacethecontrolboxcover.

Grounding

WARNING:

The unit cabinet must have an uninterrupted or

unbrokenelectricalgroundtominimizepersonal

injuryifanelectricalfaultshouldoccur.Donotuse

gaspipingasanelectricalground!

Thisunitmustbeelectricallygroundedinaccordancewith

localcodesor,intheabsenceoflocalcodes,withtheNational

ElectricalCode(ANSI/NFPA70)ortheCSAC22.1Electrical

Code.Usethegroundinglugprovidedinthecontrolboxfor

groundingtheunit.

ThermostatConnections

• Thermostatconnectionsshallbeinaccordancewiththe

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.

Connect R to one of the low voltage terminals of the

burner. Connect W to the burner’s other low voltage

terminal.

• A single stage thermostat is used with this equipment

and must operate in conjunction with any installed

accessories.

• The thermostat should be mounted about 5 feet above

theooronaninsidewall.DONOTinstallthethermostat

on an outside wall or any other location where its

operationmaybeadverselyaffectedbyradiantheatfrom

replaces, sunlight, or lighting xtures, and convective

heat from warm air registers or electrical appliances.

Refertothethermostatmanufacturer’sinstructionsheet

fordetailedmountingandinstallationinformation.

HeatAnticipator

Settheheatanticipatoraccordingtotheinstructionssupplied

by the thermostat manufacturer. To determine the heat

anticipatorsetting:

1. Addthecurrentdrawofthesystemcomponents;or

2. MeasurethecurrentowonthethermostatR-Wcircuit

afterthecirculatingblowermotorhasstarted.

BlowerSpeed

TheCMF3furnaceisequippedwitha3speedPSCmotor

thatispre-setatthefactoryforMEDIUMspeedoperation.

Foroptimumsystemperformanceandcomfort,itmaybe

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insideofthe

paneldoororseeFigure18(page29)forwiringconguration.

Table4liststhepropercirculatingairowandtemperature

risefortheCMF3furnace.

CMF 70 PG

CONVERTIBLE

CMF 70 PO

CONVERTIBLE

FactorySetFiringRate(btu/hr)* 70,000 70,000

HeatingCapactiy(btu/hr) 56,000 56,000

KitConvertedFiringRate(btu/hr)**

60,000

75,000

60,000

AFUERating(%) 80+ 80+

OriceNumber(NaturalGas) 22 N/A

OriceNumber(PropaneGas) 41 N/A

BurnerNozzleforOil N/A

0.50gph;

A;80

BlowerDxW 10x7 10x7

MotorH.P.-Speed-Type 1/4-3-PSC 1/4-3-PSC

MotorFLA 3.3Amps 3.3Amps

FuseorBreaker 15Amps 15Amps

Nom.AnticipatorSetting 0.6 0.6

TemperatureRiseRange(

F) 55

-85

o

-85

NOTES:

Electrical:Allmodelsare115volt,60Hz,1phase.

Thermostatcircuitis24VAC,60Hz.

Gasconnection:1/2”NPT.

* Ratingsto2,000feet.Over2,000ft,reduceratingsby4%foreach

additional1,000ftabovesealevel.

** TheringrateoftheCMF70seriesfurnacecanbechangedusing

anapprovedconversionkit.

AFUE=AnnualFuelUtilizationEfciency

Table3.CMF3Specications

CAUTION:

Toavoidpersonalinjuryorpropertydamage,make

surethemotorleadsdonotcomeintocontactwith

anyuninsulatedmetalcomponentsoftheunit.

• High Speed Operation:Connecttheblackwirefromthe

fanswitchtotheblackwireoftheblowermotor.

• Medium Speed Operation: Connect the black wire

fromthefanswitchtothebluewireoftheblowermotor.

NOTE: Thisisthefactorydefaultsettingandshouldnot

bechangedifhighspeedoperationisdesired.

• Low Speed Operation:Connecttheblackwirefromthe

fanswitchtotheredwireoftheblowermotor.

ConstantBlowerOperation

TheFANON&OFFswitchislocatedontopofthecontrol

box.Thisswitchprovideseitherautomaticoperationofthe

blowerthroughthethermostatorconstantbloweropeation.

Table4.CMF3 Airﬂow Data

EXTERNAL

STATIC

PRESSURE

(IN WC)

AIRFLOW (CFM)

LOW SPEED

FOR

60 KBTU/H INPUT

MEDIUM SPEED

FOR

70 KBTU/H INPUT

HIGH SPEED

FOR

75 KBTU/H INPUT

0.1 710 740 820

0.2 670 700 780

0.3 640 660 730

0.4 600 620 680

0.5 550 570 630

0.6 500 520 570

START-UP & ADJUSTMENTS

WARNING:

Allsafetyinformationmustbefollowedduringthe

start-upandoperationofthefurnace.Unqualied

individualsshouldnotattempttointerpretthese

instructions. Improper servicing could result in

dangerousoperation,propertydamage,personal

injuryordeath.

WARNING:

FIRE OR EXPLOSION HAZARD

• Failuretofollowsafetywarningsexactlycould

resultinseriousinjuryorpropertydamage.

• Installationandservicemustbeperformedby

aqualiedinstaller,serviceagencyorthegas

supplier.

• Donotstoreorusegasolineorotherammable

vaporsandliquidsinthevicinityofthisorany

otherappliance.

WHAT TO DO IF YOU SMELL GAS

• Donottrytolightanyappliance.

• Donottouchanyelectricalswitch;donotuse

anyphoneinyourbuilding.

• Leavethebuildingimmediately.

•Immediately call your gas supplier from a

neighbor’s phone. Follow the gas supplier’s

instructions.

• Ifyoucannotreachyourgassupplier,callthe

redepartment.

• Thisappliancedoesnothaveapilot.Itisequippedwith

anignitiondevicewhichautomaticallylightstheburner.

Donottrytolighttheburnerbyhand.

• BEFORELIGHTINGOROPERATINGsmellallaround

theapplianceareaforgas.Besuretosmellnexttothe

oorbecausesomegasisheavierthanairandwillsettle

ontheoor.

• Useonlyyourhandtopushinandmovethegascontrol

lever.Neverusetools.Iftheleverwillnotpushinbyhand,

don’t try to repair it, call a qualied service technician.

Forceorattemptedrepairmayresultinareorexplosion.

• Shouldoverheatingoccur,orthegassupplyfailtoshut

off,turnthemanualgasvalvetotheapplianceOFF.

Pre-StartCheckList

√Verifythepolarityoftheconnectionsarecorrect,theline

voltage power leads are securely connected and the

furnaceisproperlygrounded.

√Verify the thermostat wires (R & W) are securely

connectedintheburnercompartment.

√Verifythegaslineservicepressurebeforethefurnaceis

running:

 For natural gas, the pressure should not exceed 10.0

inchesofW.C.,andisnotlessthan3.5inchesW.C.

 ForLPgas,thelineservicepressuremustnotexceed14

in.W.C.,andmustnotbelessthan11.0in.W.C.

√Verify the roll-out and manual reset switchis closed. If

necessary, press the red button to reset a switch. DO

NOTinstallajumperwireacrossaswitchtodefeat

its function. If a switch reopens on startup, DO NOT

reset the switch without identifying and correcting the

faultcondition.

√Verifytheblowerdoorisinplace,closingthedoorswitch

inthelinevoltagecircuit.

√Verifythegaslineandallconnectionsareleakfree.

Operating Instructions for PG Direct Ignition

Burner

Do not perform these steps until all of the safety checks

havebeencompleted:

1. STOP!Readallsafetyinformationonthispage.

2. SetthethermostattoOFFortoitslowestsetting.

3. Turnoffallelectricpowertotheappliance.NOTE:This

appliance is equipped with an ignition device which

automaticallylightstheburner.DONOTtrytolightthe

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10minutesto

clearoutanygas.Ifyoustillsmellgas,STOP!and

readWHATTODOIFYOUSMELLGAS.Ifyoudon’t

smellgas,gotothenextstep.

6. TurnthegascontrolknobtoON.

7. Closethefurnacedoorandturnthelatch.

8. Turnonallelectricpowertotheappliance.

9. TurnthethermostattoONandsettothedesiredsetting.

10.Iftheappliancewillnotoperateafteronere-try,follow

theinstructionsShuttingOfftheGasSupplybelowand

callyourservicetechnicianorgassupplier.

ShuttingOfftheGasSupply

1. SetthethermostattoOFFortoitslowestsetting.

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. PushinthegascontrolknobandmovetoOFF.DONOT

FORCE.

5. Closethefurnacedoorandturnthelatch.

CheckingtheInputoftheFurnace

Refertothefurnaceratingplatetodeterminetheringrate

of the furnace. Using Table 2 (page 14), determine the

appropriateoricesizefortheringrateandgasbeingused

inyourapplication.Checktheburneroricetoensurethatit

isthecorrectsize.Theinputofthisfurnacecanbechecked

usingthefollowingsteps:

1. Shutoffallothergasred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:Onerevolutionequals

1cubicfootofgas.

4. Comparethetimemeasuredwiththeappropriatetime

listedinTable2(page14).Ifthetimevariesbymorethat

5%fromthetimesshowninthetable,thenmeasurethe

inletandgasvalvemanifoldpressures.SeeCheckingthe

InletGasPressureandCheckingtheManifoldPressures

sectionsbelow.

WARNING:

Donotattempttodrillthegasorices.Useonly

factorysuppliedorices.Improperlydrilledorices

may cause fire, explosion, carbon monoxide

poisoning,personalinjuryordeath.

5. Iftheinletgaspressureandthemanifoldpressureare

bothproperlyset,thenchecktheburneroricetoensure

thatitisproperlysized.Furthergasproblemsshouldbe

referredtothelocalgassupplier.

CheckingtheInletGasLinePressure

Theinletgaslinepressurecanbecheckedattheportlocated

ontheinletendofthegasvalve.SeeInstallingthePressure

GaugeorU-TubeManometersection.

• Natural gas installations:Theinletgaslinepressureat

thegasvalvemustbebetween5in.W.C.&7in.W.C.

• LP gas installations:Theinletgaslinepressureatthe

gasvalvemustbebetween11in.W.C.&13in.W.C.

CheckingtheManifoldPressure

Themanifoldpressurecanbecheckedattheportlocatedon

thegasoutletendofthegasvalveusingapressuregauge

orU-tubemanometer.Ifthemanifoldpressureisnotequal

tothevaluesbelow,thenitmustbeadjusted.SeeInstalling

thePressureGaugeorU-TubeManometer.

• Natural gas installations:Themanifoldpressuremust

besetat3.5in.W.C.

• LP gas installations:Themanifoldpressuremustbeset

at10.0in.W.C.

InstallingthePressureGaugeorU-Tube

Manometer

1. Determinewhichtypeofpressure(inletgasormanifold

pressure)needstobemeasured.

2. Usinga3/16”Allenwrench,removetheappropriatetap

pluglocatedonthegasvalve.SeeFigure14(page19).

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. Installattingthathasa1/8”NPTpipethreadandis

compatiblewiththepressuregaugeorU-tubemanometer

onthevalve.

4. ConnectthepressuregaugeorU-tubemanometertothe

gasvalve.Refertothegaugemanufacturer’ssupplied

instructionsforproperhookupandusage.

5. Aftermeasuringthepressure,removethepressuregauge

orU-tubemanometerfromthegasvalveandreplacethe

tapplug.NOTE:Makesurethetapplugistightandisn’t

cross-threaded.

AdjustingtheBurner

Theairshutterofthegasgunburnerispre-setatthefactory

andshouldnotbeadjustedunlesstheringrateofthefurnace

needstobeconverted.Theburnershouldrunquietly.Verify

theairshuttersettingiscorrectasshowninTable5(page

19).NOTE:Itisveryimportantthatthereisanamplesupply

ofcombustionairwithoutdecreasingburnerefciency.An

inadequateamountoffreshaircancausecarbonmonoxide

(CO)production.Thecarbondioxide(CO

2)contentoftheue

productsshouldbeintherangeof8.5%to9.5%fornatural

gasor9.0%to10.0%forLPgas.

INLET

TA P

OUTLET

TA P

Regulator

Converter

Figure14.DirectIgnitionGasValve

WARNING:

Donotattempttodrillthegasorices.Useonly

factorysuppliedorices.Improperlydrilledorices

may cause fire, explosion, carbon monoxide

poisoning,personalinjuryordeath.

At 2,000 feet, the NFGC requires that this appliance be

derated4%foreach1,000feetofaltitude.Forexample,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orice

sizeordecreasingthemanifoldpressure.

OperatingInstructionsforPOOILBurners

OilburnersinPOseriesfurnacesarefactoryequippedwith

aprimarycontrolcapableofeitherintermittentorinterrupted

ignition.

Start-UpProcedure

1. Openallmanualshut-offvalvesintheoilsupplylinefrom

thetanktotheburner.

2. TurnONtheelectricalsupplytothefurnace.

3. Settheroomthermostattothedesiredtemperature.

Air-BleedProcedure-SinglePipeInstallation

1. Openthedoortothefurnace.

2. Attach1/4”I.D.plastictubeovertheendoftheairbleed

valveontheoilpumpasshowninFigure15.Placethe

otherendofthetubeinalargecontainer.

3. Pressthedoorswitchintostarttheburner.

4. Turntheairbleedvalveopennotmorethan1/2turnto

getafastowofoilintothecontainer.

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

terminals T-T on the primary control while burner is

running.IffurnaceisequippedwiththeHoneywellR7184

orBeckett7505primarycontrol,performthenext3steps

toprimetheoilpump:

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.

Table5.AirShutterSettingforDifferentFuels

INPUT

(BTU/H)

NATURAL

GAS SETTING

LP GAS

SETTING

OIL SETTING

60,000 4.0 4.5 2.0

70,000 4.5 4.5 2.25

75,000 5.0 5.0 N/A

b. Ifprimeisnotestablishedwithinthe4minutes,the

controlwilllockout.Presstheresetbuttontoreset

thecontrolandgobacktostep“a”.

c. Repeatsteps“a”&“b”,ifneeded,untilthepumpis

fullyprimed.

6. Whenoilowisclearofairbubbles,closeair-bleedvalve

andtighten.NOTE:Airbleedouttimewillvarydepending

onlengthofoilline,numberofbends,etc.

7. Removethejumperwireontheprimarycontrol.

NOTE:IffurnaceisequippedwiththeBeckett7505primary

control,primetheoilpumpusingthefollowingsteps:

1. Aftertheburnerstarts,pressandholdtheresetbuttonfor

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theigniter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.

OilBurnerShutdownProcedure

Settheroomthermostatto“OFF”oritslowestsetting.

FlameAdjustment

1. Setthethermostatbelowroomtemperaturetostartthe

furnace.

2. Allowthefurnacetooperateforabout10minutes.

3. Adjustthe air shutter setting until 10% CO

2 with zero

smokeorlessisachieved.NOTE:Thedraftoverthere

mustbeatleastnegative0.02in.W.C.Thefactoryset

airshuttersettingsareshowninTable5.

ElectrodeSetting

Theelectrodesettingiscarefullysetatthefactory.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properly

positioned, as shown in Figure 16 (page 20). Improperly

adjustedelectrodescanresultinpoorignition.Donotpermit

theelectrodestobecloserthan¼”toanygroundedsurface.

SwitchingfromInterruptedtointermittentIgnition

Control

HoneywellandBeckettoilprimarycontrolscanbeswitched

between interrupted and intermittent ignition control. To

switchfrominterruptedduty(Factoryset)tointermittentduty,

removetheblueignitorwirefromthequick-connectterminal.

Attachtheburnermotorandigniterwiretotheburnermotor

(orange)controlterminalbysplicingoraddingtabadapters.

Sealandisolateanybarewires.SeeFigure16.

Firing Rate Conversion

TheratedringratesoftheCMF3convertiblefurnace(PO&

PG)canbeadjustedfromthefactorysettingof70,000BTU/

hr.Theringratecanbe changed to either65,000BTU/

hr(PO&PGmodels)or75,000BTU/hr(PGmodelsonly)

usingtheappropriatecertiedconversionkitinstalledbya

licensedcontractor.SeetheTechnicalSalesLiteraturefor

theappropriatekittoorder.

Figure15.OilPump

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 Beckett

Made by Suntec

INLET

NO. 2 FUEL

A2EA-6520

Becket

Nozzle Port

3/16 Flare Fitting

Bypass Solenoid Valve

Cordset

Inlet Port

1/4 NPTF

Bleed & Gauge Port

Pressure Adjustment

Screw

Inlet Port

1/4 NPTF

Return Port - Install 1/6” Bypass Pipe

Plug for 2-pipe System Only.

(Use 5/32” Allen Wrench)

Figure16.POOilBurnerElectrodeSettings

5/32” GAP

ELECTRODE

NOZZLE

0-1/16”

5/16” ABOVE CL

1 1/8”

OPERATING SEQUENCE

PG Gas Furnaces

1. ThethermostatcallsforheatbyenergizingtheWterminal

with24volts.

2. Thecombustionblowermotorenergizes.Afterthemotor

begins to rotate, the centrifugal switch (located in the

motorendcap)closes.

3. A30 secondpre-purgeperiod beginsandthe ignition

controlinitiatesaninternalsafetystartcheck.

4. Ifignitioncontrolpassesthesafetycheck,a15second

ignitorwarm-upperiodbegins.Duringthisperiod,the

ignitorwarmsuptoanignitiontemperature.

5. Thecontrolapplies24voltstothegasvalve.

6. Theignitorignitesthegas,andthepresenceofame

must be detected within a timed trial ignition period.

NOTE:Ifameisdetected,theignitorisde-energized

andthegasvalvewillremainopenuntilthecallforheat

from the thermostat is completed. If the ame is 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satised,theW

terminalde-energizesthegasvalvecircuitandthegas

valvewillclose.

9. The circulating air blower will de-energize when the

temperaturefanswitchopens.

NOTES:

• Thecontrolwillclosethegasvalveiftheamesensor

doesnotdetectthepresenceofaame.Thecontrolwill

attempt to re-ignite the gas 2 times before locking out.

If lock-out occurs, the control can be reset by setting

the 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 Furnaces

Theprocesseslistedbelowareapplicableonlytofurnaces

equippedwithaBeckett7505Control.

1. Whenacallforheatisinitiated,thereisa2-6second

delaywhilethecontrolperformsasafestartcheck.

2. Theignitionandmotorturnonforthe15secondvalve

ondelay.Followingthedelay,thevalveenergzesanda

ameshouldestablishwithina15-secondlockouttime.

NOTES:

• Ifameisnotsensedwithinthe15-secondlockouttime,

thecontrolshutsdownonsafetylockout.Theresetbutton

onthecontrolmustbemanuallyreset.

• Ifcontrollocksout3times,thecontrolentersrestricted

lockout.ToresetBeckett7505: hold reset buttondown

for15secondsuntiltheredlightturnsoffandtheyellow

lightturnson.

3. Afterameisestablished,theignitionremainsONfor

10 seconds to ensure ame stability. It then turns off

(interruptedignition).

4. Thecirculatingairblowerwillenergizeandthetemperature

fanswitchwillclose.

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Maytag CMF3 Installation guide

Brand: Maytag

Model: CMF3

Category: Stoves

Type: Installation guide

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Maytag CMF3 Installation guide

Maytag CMF3 Installation guide

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