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CMF95

Miller CMF95, CMF95 Series Installation guide

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95.1% AFUE
Direct Vent (Sealed Combustion) Forced Air
CMF95 Series Downflow Condensing Gas Furnace
For Installation in:
• ManufacturedHomes
• RecreationalVehicles,ParkModels,&
ManufacturedBuildings
• ModularHomes/Buildings
INSTALLATION INSTRUCTIONS
DO NOT DESTROY THIS MANUAL. KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.
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.
WARNING:
RISQUED’INCENDIEOUD’EXPLOSION
•Le non-respect des avertissements de
sécurité pourrait entraîner des blessures
graves,lamortoudesdommagesmatériels.
•L’installation et l’entretien doivent être
effectués par un installateur qualié, un
organismedeserviceoulefournisseurde
gazstaller,serviceagencyorthegassupplier.
•Nepasentreposerniutiliserdel’essenceni
d’autres vapeurs ou liquides inammables
danslevoisinagedecetappareil,nidetout
autreappareil.
QUEFAIRES’ILYAUNEODEURDEGAZ
•Nepastenterd’allumeraucunappareil.
•Netoucheràaucuninterrupteurélectrique;
n’utiliseraucuntéléphonedanslebâtiment.
•Évacuerl’immeubleimmédiatement.
•Appeler immédiatement le fournisseur de
gazenemployantletéléphoned’unvoisin.
Respecter à la lettre les instructions du
fournisseurdegaz.
•Sipersonnenerépond,appelerleservicedes
incendies.
AVERTISSEMENT
2
IMPORTANT SAFETY INFORMATION .......................3
REQUIREMENTS & CODES .......................................3
ClearancestoCombustibleMaterials.......................5
CombustionAirQuality.............................................5
HeatingLoad............................................................5
CondensateDisposal...............................................5
COMBUSTION AIR & VENTING REQUIREMENTS ....6
ImportantInformation...............................................7
CategoryIVAppliances............................................7
DirectVentInstallation..............................................7
VentPipeLength&Diameter................................. 7
VentPipeMaterial.................................................. 8
VentPipeInstallation.............................................. 8
OutdoorTerminations-HorizontalVenting............. 8
OutdoorTerminations-VerticalVenting.................. 9
VentFreezingProtection...................................... 10
ExistingInstallations............................................. 10
VentilaireIIIorIVAirQualityPackage................... 10
CIRCULATING AIR REQUIREMENTS ...................... 11
Plenums&AirDucts.............................................. 11
SupplyAirConnections.......................................... 11
Dampers................................................................. 11
UnconditionedSpaces........................................... 11
ClosetInstallations................................................. 11
FurnaceFilter......................................................... 12
AcousticalTreatments............................................ 12
FURNACE INSTALLATION ....................................... 13
GeneralInformation................................................ 13
BeforeYouInstallthisFurnace............................... 13
LocatingtheUnit.................................................... 13
MA-200BaseInstallation....................................... 13
InstallingtheFurnaceonanMA-200Base............ 13
MA-100UniversalBaseInstallation........................ 14
InstallingtheFurnaceonanMA-100Base............. 15
CondensateDrainage............................................ 15
GAS SUPPLY & PIPING ............................................ 16
LeakCheck........................................................... 16
High-AltitudeApplication........................................ 17
ConvertingtoLP/PropaneGas............................ 18
RemovingtheBurnerOrices.............................. 19
GasPressureVerication....................................... 19
MeasuringtheSupplyGasPressure.................... 19
Lighting&AdjustmentoftheAppliance................ 20
MeasuringtheManifoldPressure......................... 20
RemovingtheManometer/PressureGauge...... 20
CompletingtheConversion.................................... 20
ELECTRICAL WIRING ............................................... 21
LineVoltageWiring................................................ 21
Grounding............................................................... 21
Thermostat/LowVoltageConnections................. 21
HeatAnticipator.................................................... 22
START-UP&ADJUSTMENTS ................................... 23
Pre-StartChecklist................................................. 23
Start-UpProcedures.............................................. 23
Verifying&AdjustingInputRate............................. 23
Verifying&AdjustingTemperatureRise................. 23
VerifyingBurnerOperation..................................... 24
VerifyingOperationoftheSupplyAir
LimitSwitch............................................................ 24
OPERATING SEQUENCE ......................................... 25
HeatingCycle......................................................... 25
CoolingCycle......................................................... 25
FanMode............................................................... 25
MAINTENANCE ......................................................... 25
AirFilters................................................................ 26
BlowerCompartment.............................................. 26
CleaningofBurners................................................ 26
VentSystem........................................................... 26
HeatExchanger&BurnerMaintenance................. 26
Lubrication............................................................... 26
TROUBLESHOOTING ............................................... 27
DESCRIPTION OF COMPONENTS .......................... 27
TABLE OF CONTENTS
3
FIGURES & TABLES ................................................. 28
Figure18-FurnaceDimensions.......................... 28
WiringDiagram....................................................... 29
Figure19-CMF95WiringDiagram...................... 29
GasInformation...................................................... 30
Table7-GasFlowRates..................................... 30
Table8-GasPipeCapacities.............................. 30
Table9-HighAltitudeDerationChartfor
PropaneGas......................................... 31
Table10-Natural
GasHeatingValues................. 31
Table11-HighAltitudeDerationChartfor
Nat.Gas-HighHeatingValues........... 31
Table12-HighAltitudeDerationChartfor
Nat.Gas-LowHeatingValues............ 31
VentingInformation................................................ 32
Table13-VentTerminationClearances............... 32
Figure20-Horizontal&VerticalVenting.............. 33
INSTALLATION / PERFORMANCE CHECKLIST ..... 36
IMPORTANT SAFETY INFORMATION
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.
WARNINGindicatesapotentiallyhazardoussituationthat
ifnot avoided,couldresult in personalinjuryordeath.
CAUTIONindicatesapotentiallyhazardoussituationthat
ifnotavoided,mayresultinminorormoderateinjuryor
propertydamage.
REQUIREMENTS & CODES
WARNING:
Theinformationlistedbelowmustbefollowed
duringtheinstallation,service,andoperation
of this furnace. Failure to follow safety
recommendations could result in possible
damage to the equipment, serious personal
injuryordeath.
• This 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/NFPA54)ortheNaturalGasandPropane
InstallationCode,CAN/CGAB149.1.
• Useonlywithtypeofgas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pages6-10.
• Provideadequateclearancesaroundtheventairintake
terminalasspeciedinFigures1-4(pages9-10).
• Combustionproducts mustbedischarged outdoors.
Connectthisfurnacetoanapprovedventsystemonly,
asspeciedonpages7-10.
• Nevertest forgas leakswith an opename. Use a
commercially available soap solution to check all
connections.Seepages16-17.
• Thisfurnaceisdesignedtooperatewithamaximum
externalpressureriseof0.3inchesofwatercolumn.
ConsultTable5(page24)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must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:
4
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,4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,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.
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.
Combustion & Ventilation Air
• US:NationalFuelGasCode(NFGC/NFPA-54),Airfor
CombustionandVentilation
• CANADA:NaturalGasandPropaneInstallationCodes
(NSCNGPIC), Venting Systems and Air Supply for
Appliances
DuctSystems
• USandCANADA:AirConditioningContractorsAssociation
(ACCA)ManualD, SheetMetaland AirConditioning-
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
• AmericanNationalStandard(NFPA-54)and/orCAN/CSA
B149forallgas-redfurnacemodels.
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
• Federal Manufactured Home Constructions & Safety
Standard(H.U.D.Title24,Part3280.707[a][2])
• AmericanNationalStandard(ANSI-119.2/NFPA-501C)
forallrecreationalvehicleinstallations.
Safety
• US:(NFGC)ANSIZ223.1/NFPA54andtheInstallation
Standards, Warm Air Heating and Air Conditioning
SystemsANSI/NFPA90B.
• CANADA: CAN/CGA-B149.1 and .2–M00 National
StandardofCanada.(NSCNGPIC)
5
Clearances to Combustible Materials
ThisfurnaceisDesignCertiedintheU.S.andCanada
by CSA International for the minimum clearances to
combustiblematerials.NOTE:Thefurnaceis listed for
installationoncombustibleornon-combustibleooring.
However,woodistheonlycombustibleooringallowed
forinstallation.Toobtainfurnacebasemodelnumberand
specicclearanceinformation,refertothefurnacerating
plate,locatedinsideofthefurnacecabinet.
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.
Allow18inchesminimumclearancefromthefrontof
theunit.However36inchesisstronglyrecommended.
SeeTable1forminimumclearancerequirements.
Table1.MinimumClearanceRequirements
INSTALLATION CLEARANCES
CLOSET ALCOVE
Front* 1" 1"
Rear 0" 0"
Sides 0" 0"
To p 6" 6"
Ductw/in3ftoffurnace 1/4" 1/4"
Vent 0” 0”
PlenumWithoutCoilBox 1" 1"
PlenumWithCoilBox 0” 0”
NOTES:
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
2
minimum.Forspecialclearancesbetween1”-5”,
requirementsarealouvereddoorwithaminimumof
250in
2
(1613cm
2
)freearea.Afullylouveredclosetdoor
isstronglyrecommendedforbothinstallationtypes.
LEFT
SIDE
FRONT
RIGHT
SIDE
REAR
VENT
Theductworkshouldbeappropriatelysizedtothecapacity
of the furnace to ensure its proper airow rating. For
installationsabove2,000ft.,thefurnaceshouldhavea
sealevelinputratinglargeenoughthatitwillmeetthe
heatingloadafterderationforaltitude.
CombustionAirQuality
CAUTION:
Combustion air must not be drawn from a
corrosiveatmosphere.
To maximize heat exchanger life, the combustion air
mustbefreeofchemicalsthatcanformcorrosiveacidic
compoundsinthecombustiongases.Therequiredsource
ofcombustionairistouseoutdoorair.
Exposuretothefollowingsubstancesinthecombustion
airsupplywillresultinsafetyandperformancerelated
problems.Thelistbelowcontainsexamplesofchemical
containments found in a wide variety of common
commercialhouseholdproducts:
•Permanentwavesolutions
•Chlorinatedwaxesandcleaners
•Chlorinebasedswimmingpoolchemicals
•Watersofteningchemicals
•De-icingsaltsorchemicals
•CarbonTetrachloride
•Halogentyperefrigerants
•Cleaningsolvents(perchloroethylene)
•Printinginks,paintremovers,varnishes,etc.
•HydrochloricAcid
•Cementsandglues
•Antistaticfabricsofteners
•Masonryacidwashingmaterials
Heating Load
Thisfurnaceshouldbesizedtoprovidethedesignheating
loadrequirement.Heatingloadestimatescanbemade
usingapprovedmethodsavailablefromAirConditioning
ContractorsofAmerica(ManualJ);AmericanSocietyof
Heating,Refrigerating,andAirConditioningEngineers;
or other approved engineering methods. Excessive
oversizingofthe furnacecouldcause thefurnace
and/orventtofailprematurely.
CondensateDisposal
Themethodfordisposingofcondensatevariesaccording
tolocalcodes.Consultyourlocalcodeorauthorityhaving
jurisdiction. Neutralizer kit P/N 902377 is available for
use with thisfurnace. Pleasefollowtheinstructions
providedwiththekit.
6
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.
AVERTISSEMENT:
RISQUED’EMPOISONNEMENTAU
MONOXYDE DE CARBONED
Le non-respect des consignes suivantes portant
sur chacun des appareils raccordés au système
d’évacuation mis en service pourrait entraîner
l’empoisennement au monoxyde de carbone ou
la mort. Les consignes suivantes doivent être
observéespourchaqueappareilraccordéausystème
d’évacuationmisenservicesilesautresappareils
raccordésausystèmenesontpasenservice:
1.Scellertouteouverturenonutiliséedelasystéme
d’évacuation;
2.S’assurerquelasystémed’évacuationprésente
des dimensions et une pente horizontale
conformes à la norme ANSI Z223.1/NFPA
54, intitulée National Fuel Gas Code ou aux
codes d’installation CSA-B149.1, ainsi qu’aux
présentesinstructions.S’assurerquelasystéme
d’évacuation n’est pas bloquée, restreinte,
corrodée,qu’ellenefuitpasetqu’elleneprésente
aucunautredéfautpotentiellementdangereux;
3.Danslamesuredupossible,fermertoutesles
portesetfenêtresdubâtiment,ettouteslesportes
entrelapièceoùsetrouvel’appareilraccordéà
lasystémed’évacuationetlesautrespiècesdu
bâtiment.
4.Fermerlesregistresdesfoyers;
5.Mettre en service les sécheuses et tout autre
appareil qui n’est pas raccordé à la systéme
d’évacuation.Fairefonctionneràrégimemaximal
toutventilateurd’évacuation,telqueleshottesde
cuisinièreetlesventilateursdesallesdebains.
Nepasmettreenservicelesventilateursd’été.
6.Respecterlesinstructionsd’allumage.Mettreen
servicel’appareilàl’essai.Réglerlethermostat
demanièreàcequel’appareilfonctionnesans
interruption;
7.Vérifier s’il y a débordement à l’orifice
d’évacuationducoupetiragedesappareilsdotés
d’un coupe tirage 5 minutes après l’allumage
du brûleur principal. Utiliser la amme d’une
allumetteoud’unechandelle.
8.Si l’on constate, au cours de l’un des essais
quiprécèdent, quel’évacuationest déciente,
corrigerlesystèmed’évacuationconformément
àla normANSIZ223.1/NFPA 54, NationalFuel
GasCode,et(ou)auxcodesd’installationCSA
B149.1.
9.Après avoir déterminé que tous les appareils
raccordésàlasystémed’évacuationévacuent
correctement tel que prescrit ci-dessus,
rouvrirlesportesetlesfenêtresetremettreles
ventilateursd’évacuation,lesregistresdefoyers
ettoutautreappareilfonctionnantaugazàleur
étatdefonctionnementinitial.
7
Direct Vent Installation
Thiscondensingfurnaceiscertiedforinstallationasa
DirectVent(2-pipe)appliance.DirectVent(2-pipe)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.This section
speciesinstallationrequirementsforDirectVent(2-pipe)
piping.Table2(page8)containsthelengthofventand
combustionairpipingforthistypeofinstallation.
Provisionsmustbemadeduringtheinstallationofthis
furnacethatprovideanadequatesupplyoffreshairfor
combustionandventilation.Thecombustionairfromthe
outsideneedstobeclearofchemicalsthatcancause
corrosion. The inlet pipe should not be placed near
corrosivechemicalssuchasthoselistedonpage5.
Airopeningsontopofthefurnaceandopeningsincloset
doorsorwallsmustneverberestricted.Ifthefurnaceis
operatedwithoutadequateairforcombustion,theame
roll-outswitchwillopen,turningoffthegassupplytothe
burners.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.I f
aswitchmustbereplaced,useonlythecorrectsizedpart
speciedintheReplacementPartsListprovidedonline.
VentPipeLength&Diameter
Forproperfurnaceoperation,thecombustionairandvent
pipingmustnotbeexcessivelyrestrictive.
• Theventingsystemshouldbedesignedtohavethe
minimumnumberofelbowsorturns.
• Allhorizontalrunsmustslopeupwardsfromthefurnace
at1/4inchminimumperrunningfootofvent.
• Transitiontothenalventdiametershouldbedoneas
closetothefurnaceoutletaspractical.
• Alwaysusethesamesizeoralargerpipeforcombustion
airthatisusedfortheexhaustvent.
Table2(page8)indicatesthemaximumallowablepipe
lengthforafurnaceofknowninputrate,wheninstalled
withpipingofselecteddiameterandnumberofelbows.To
usethetable,thefurnaceinputrate,thecenterlinelength
andthenumberofelbowsoneachpipemustbeknown.
Whenestimatingthelengthofventruns,consideration
mustbemadetotheeffectofelbowsandotherttings.
Thisisconvenientlyhandledusingtheideaof“equivalent
length”.Thismeansthettingsareassignedalinearlength
thataccountsforthepressuredroptheywillcause.For
example:a3”diameter,longradiuselbowisworththe
equivalentof3.5feetoflinearrun.
Theequivalentlenghtsofteesandvariouselbowsare
listedinTable2.Measurethelinearlengthofyourventrun
andthenaddintheequivalentlengthofeachtting.The
ImportantInformation
WARNING:
Furnaceinstallationusingmethodsotherthan
thosedescribedinthefollowingsectionsmust
complywiththeNationalFuelGasCode(NFGC)
andallapplicablelocalcodes.
WARNING:
Upon completion of the furnace installation,
carefullyinspectthe entire uesystemboth
insideandoutsidethefurnacetoassureitis
properlysealed.Leaksintheuesystemcan
resultinseriouspersonalinjuryordeathdue
toexposureofueproducts,includingcarbon
monoxide.
WARNING:
This furnace must not be vented with other
appliances, even if that appliance is of the
condensingtype.Thisincludeswaterheaters
ofanyefciency.Commonventingcanresult
inseverecorrosionofotherappliancesortheir
venting and can allow combustion gases to
escapethroughsuchappliancesorvents.Do
notventthefurnacetoareplacechimneyor
buildingchase.
• This furnace must be vented in compliance with
the current revision of the National Fuel Gas Code
(ANSI-Z223.1/NFPA54). 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). Consultlocalcodes for
special requirements. These requirements are for
USinstallationsasfoundintheNFGC.
• TherequirementsinCanada(B149.1)arestructured
differently. In Canada, venting shall conform to the
requirementsofthecurrent(CAN/CGAB149.1or.2)
installationcodes.Consultlocalcodesforspecial
requirements.
CategoryIVAppliances
Thisfurnaceisclassiedasa“CategoryIV”appliance,
whichrequiresspecialventingmaterialsandinstallation
procedures.CategoryIVappliancesoperatewithpositive
ventpressureandrequiresthoroughlysealedventsystems.
Theyalso produce liquidcondensate, which isslightly
acidicandcancauseseverecorrosionofordinaryventing
materials.Furnaceoperationcanbeadverselyaffected
byrestrictiveventandcombustionairpiping.
8
• Thequalityofoutdoorairmustalsobeconsidered.Be
surethatthecombustionairintakeisnotlocatedneara
sourceofsolventfumesorotherchemicalswhichcan
cause corrosion of the furnace combustion system.
(Seepage5forasamplelistofsubstances).
• Routepipingasdirectaspossiblebetweenthefurnace
and the outdoors. Longer vent runs require larger
diameters.Ventpipingmustbeslopedupwards1/4”
perfootinthedirectionfromthefurnacetotheterminal.
Thisensuresthatanycondensateowsbacktothe
condensatedisposalsystem.
• When a Direct Vent (2-pipe) system is used, the
combustionairintakeandtheventexhaustmustbe
locatedinthesameatmosphericpressurezone.This
meansbothpipesmustexitthebuildingthroughthe
sameportionofexteriorwallorroofasshowninFigure
20,page33.
• Piping must be mechanically supported so that its
weightdoesnotbearonthefurnace.Pipe supports
mustbeinstalledaminimumofevery5feetalongthe
ventruntoensurenodisplacementafterinstallation.
Supportsmaybeatshorterintervalsifnecessaryto
ensurethattherearenosaggingsectionsthatcantrap
condensate. It is recommended to install couplings
alongtheventpipe,oneithersideoftheexteriorwall
(Figure20).Thesecouplingsmayberequiredbylocal
code.
• Ifbreakableconnectionsarerequiredinthecombustion
airinletpipe(ifpresent)andexhaustventpiping,then
straight neoprene couplings for 2” or 3” piping with
hose clamps can be used.These couplings can be
orderedthroughyourlocalfurnacedistributor.Toinstall
acoupling:
1. Slidetherubbercouplingovertheendofthepipe
thatisattachedtothefurnaceandsecureitwith
oneofthehoseclamps.
2. Slidetheotherendoftherubbercouplingontothe
otherpipefromthevent.
3. Securethecouplingwiththesecondhoseclamp,
ensuringthattheconnectionistightandleakfree.
OutdoorTerminations-HorizontalVenting
• Ventandcombustionairintaketerminationsshallbe
installedasshowninFigures1&2(page9)andin
accordancewiththeseinstructions:
• Ventterminationclearancesmustbeconsistentwiththe
NFGC,ANSI2223.1/NFPA54and/ortheCSAB149.1,
NaturalGasandPropaneInstallationCode.Table12
(page32)liststhenecessarydistancesfromthevent
terminationtowindowsandbuildingairintakes.
• Vent and combustion air intake terminations must
be located to ensure proper furnace operation and
conformance to applicable codes. A vent terminal
mustbelocatedatleast3feetaboveanyforcedair
inletlocatedwithin10feet.Thisdoesnotapplytothe
combustionairinletofadirectvent(twopipe)appliance.
InCanada,CSAB149.1takesprecedenceoverthese
instructions.SeeTable12(page32).
totallength,includingtheequivalentttinglengths,must
belessthanthemaximumlengthspeciedinthetable.
Condensingfurnacecombustionproductshaveverylittle
buoyancy,soTable2istobeusedwithoutconsideration
ofanyverticalriseinthepiping.
VentPipeMaterial
Ventandcombustionairpipeandttingsmustbeoneof
thefollowingmaterialsinthelistandmustconformtothe
indicatedANSI/ASTMstandards.Cementmustconform
toASTMStandardD2564forPVCandStandardD2235
forABS.PVCprimermustmeetstandardASTMF656.
WhenjoiningPVCpipingtoABS,usePVCsolventcement.
(SeeprocedurespeciedinASTMStandardD3138).
In Canada, all plastic vent pipes and ttings including
anycement,cleaners,orprimersmustbecertiedasa
systemtoULCS636.Howeverthisrequirementdoesnot
applytopipinginternaltothefurnace.
Materials Standards
SCHEDULE40PVC............................................... D1785
PVC-DWV.............................................................. D2665
SDR-21&SDR-26................................................. D2241
ABS-DWV.............................................................. D2661
SCHEDULE40ABS.............................................. F628
FOAM/CELLULARCOREPVC........................... F891
VentPipeInstallation
CAUTION:
Combustion air must not be drawn from a
corrosiveatmosphere.
Thisfurnacehasbeencertiedforinstallationwithzero
clearancebetweenventpipingandcombustiblesurfaces.
However,itisgoodpracticetoallowspaceforconvenience
ininstallationandservice.
• In the absence of local codes, the location of any
combustionairinletrelativetoanyventterminalmust
beatleast8inches.Thisincludesinstallationsinvolving
morethanonefurnace.
MaximumDirectVent,DualPipeLength(FT.)
CMF95 INPUTS
(BTU)
INLET / OUTLET
2” Diameter
INLET / OUTLET
3” Diameter
45,000 30 60
72,000 30 60
†
NOTES:
1. Subtract2.5ft.foreachadditional2inchlongradiuselbow,subtract
5ftforeachadditional2”shortradiiouselbow,subtract3.5ft.for
eachadditional3inchlongradiuselbow,and7ft.foreachadditional
3inchshortradiuselbow.
2. Two45degreeelbowsareequivalenttoone90degreeelbow.
3. Thistableappliesforelevationsfromsealevelto2,000ft.Forhigher
elevations,decreasepipelengthsby8%per1,000ftofaltitude.
Table2.VentPipeLengths
9
• Allminimumclearances(Figure2)mustbemaintained
toprotectbuildingmaterialsfromdegradationbyue
gases.
• For optimal performance, vent the furnace through
awallthatexperiencestheleast exposuretowinter
winds.
• The vent termination shall be located at least 3 ft.
horizontallyfromanyelectricmeter,gasmeter,regulator
andanyreliefequipment.ThesedistancesapplyONLY
to U.S. installations. In Canada, CSA B149.1 takes
precedenceovertheseinstructions.
• Donotinstalltheventterminalsuchthatexhaustis
directed into window wells, stairwells, under decks
orintoalcovesorsimilarrecessedareas,anddonot
terminateaboveanypublicwalkways.
• Ifventinghorizontally,sidewallventkitsareavailable
accordingtothepipediametersizeoftheinstallation.
For3inchpipeusekit#904347.Faceplatekit#902375
isalsoavailablefor3inchhorizontalventing.Please
followtheinstructionsprovidedwiththekits.
• Concentricventterminationkitsareavailableforuse
withthesefurnaces.For3inchpipeusekit#904953.
Pleasefollowtheinstructionsprovidedwiththekit.
• Whentheventpipemustexitanexteriorwallcloseto
thegradeorexpectedsnowlevelwhereitisnotpossible
toobtainclearancesshowninFigure1,arisermaybe
providedasshowninFigure3.Insulationisrequired
topreventfreezingofthissectionofpipe.SeeTable3
(page10)forventfreezingprotection.
OutdoorTerminations-VerticalVenting
Terminationspacingrequirementsfromtheroofandfrom
eachotherareshowninFigure4.Theroofpenetration
mustbeproperlyashedandwaterproofedwithaplumbing
roofbootorequivalentashing.Ventandcombustionair
pipingmaybeinstalledinanexistingchimneywhichis
notinuseprovidedthat:
• Boththeexhaustventandairintakerunthelengthof
thechimney.
• Thetopofthechimneyissealedandweatherproofed.
• The termination clearances shown in Figure 4 are
maintained.
• Noothergasredorfuel-burningequipmentisvented
throughthechimney.
12” min. to maximum
expected snow level
(both pipes)
90° Elbow
Exhaust vent
option B
Exhaust vent
option A
Mounting kit faceplate
secured to wall with screws
(both pipes)
Combustion
air inlet
Exhaust vent
option C
18” Min.
36” Max.
8” Min.
36” Max.
(all positions)
Figure1.Inlet&ExhaustPipeClearances
Note 2
Mechanical draft
vent terminal
Direct vent
terminal
50,000 Btuh
or less
Forced air inlet
Direct vent
terminal - more
than 50,000 Btuh
Mechanical
draft vent
terminal
Mechanical
draft vent
terminal
Less
than
10 ft.
3 ft.
NOTES:
1. All dimensions shown are
minimum requirements.
2. Exterior vent terminations must
be located at least 12” above the
maximum expected snow level.
Note 2
4 ft
4 ft
12 in.
12 in.
9 in.
Note 2
Figure 2. Vent Locations
Support
NOTE: Vent Configuration to Provide
12" Minimum height above Snow Level.
1/2"
Armaflex
Insulation or
Equivalent
(if required)
12" Above
Maximum
Expected
Snow Level
19" Max.
(See Note)
Outside
Wall
Figure 3. Alternate Horizontal Vent Installation
Figure4.VerticalVentTermination
Combustion Air
Exhaust Vent
12” Above Maximum
Expected Snow Level
(Both pipes)
Elbows on the combustion air
inlet must be positioned pointing
away from the exhaust vent.
8" Min.
36" Max.
Plumbing Vent Roof Boot
(Both Pipes)
10
ExistingInstallations
Whenanexistingfurnaceisremovedfromaventsystem
servingotherappliances,theexistingventsystemmay
notbesizedproperlytoventtheremainingappliances
(Forexample:waterheater).Animproperlysizedventing
systemcanresultintheformationofcondensate,leakage,
orspillage.Theexistingventsystemshouldbechecked
tomakesureitisin compliance with NFGC and must
bebroughtintocompliancebeforeinstallingthefurnace.
NOTE: Ifreplacinganexistingfurnace,itispossibleyouwill
encounteranexistingplasticventingsystemthatissubject
toaConsumerProductSafetyCommissionrecall.The
pipesinvolvedintherecallareHighTemperaturePlastic
Vent(HTPV).Ifyourventingsystemcontainsthese
pipesDONOTreusethisventingsystem!Thisrecall
doesnotapplytootherplasticventpipes,suchaswhite
PVCorCPVC.CheckfordetailsontheCPSCwebsiteor
calltheirtoll-freenumber(800)758-3688.
VentilaireIIIorIVAirQualityPackage
(Accessory)
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5fortypicalinstallation.
Completeinstallationinstructionsaresuppliedwitheach
airqualitypackage.
VentilAireIII
VentilAireIV
Figure 5. VentilAire III & IV
VentFreezingProtection
CAUTION:
Whentheventpipeisexposedtotemperatures
below freezing (i.e., when it passes through
unheated spaces, chimneys, etc.) the pipe
mustbeinsulatedwith1/2inchthicksponge
rubberinsulation,Armaex-typeinsulationor
equivalent.Insulatingpipeisimportanttoavoid
condensate icing.
• Table3liststhemaximumlengthofuepipethatcan
travelthroughanunconditionedspaceoranexterior
space. The total vent length must not exceed the
lengthsnotedintheTable.ForCanadianinstallations,
pleaserefertotheCanadianInstallationCode(CAN/
CGA-B149.1or2)and/orlocalcodes.
• Forextremelycoldclimatesorforconditionsofshort
furnace cycles (i.e. set back thermostat conditions)
thelast18inchesofventpipecanbereduced.Itis
acceptabletoreducefrom3”to2-1/2”or,3”to2”ifthe
totalventlengthisatleast15feetinlength,andthe
ventlengthiswithintheparametersspeciedinTable
2 (page 8).The restriction should be counted as 3
equivalentfeet.Smallerventpipesarelesssusceptible
tofreezing,butmustnotbeexcessivelyrestrictive..
• To prevent debris or creatures from entering the
combustionsystem,aprotectivescreenmaybeinstalled
overthecombustionairintakeopening.Thescreens
holesizemustbelargeenoughtopreventairrestriction.
Winter Design
Temperature
MaximumFluePipeLength(FEET)
inUnconditioned&ExteriorSpaces
WithoutInsulation WithInsulation*
20 45 70
0 20 70
-20 10 60
*NOTE:Insulationthicknessgreaterthan3/8inch,basedonan
Rvalueof3.5(ftxFxhr)/(BTUxin.)
Table 3. Vent Protection
11
CIRCULATING AIR REQUIREMENTS
WARNING:
Donotallowcombustionproductstoenterthe
circulating air supply. Failure to prevent the
circulation of combustion products into the
livingspacecancreatepotentiallyhazardous
conditions including carbon monoxide
poisoningthatcouldresultinpersonalinjury
ordeath.
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web.
• 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or
return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replacementpartslistprovided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6.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
Figure 6. Closet Installation
12
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
2
(1290
cm
2
)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
2
(1290cm
2
).
• 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
2
(1935cm
2
).
• 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”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.
• 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
2
(1290cm
2
)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”.
Furnace Filter
WARNING:
Neveroperate the furnace without a lter in
place.Accumulatingdustinthereturnaircan
build up on internal components, resulting
inlossofefciency,equipmentdamage,and
possiblere.
• CMF95furnacesare supplied with a single air lter
whenshippedfromthefactory.Accessingthelterdoes
notrequiretoolsandcanbeeasilyremovedfromthe
insideoftheaccessdoor.Thelterissecuredtothe
doorwitharetainingbracket.Itisrecommendedthat
thelterbecleanedorreplacedmonthly.Newlybuiltor
recentlyrenovatedhomesmayrequiremorefrequent
changinguntiltheconstructiondusthasminimized.
• Replacementltersareavailableatmostlocalretailers.
Inspectltersfrequentlyandreplacewhennecessary
withlterofsamedimensionalsize.Filtersdesignedto
removesmallerparticlessuchaspollen,mayrequire
additionalmaintenance.
Acoustical Treatments
Damping ducts, exible vibration isolators, or pleated
media-styleltersonthereturnairinletof thefurnace
maybeusedtoreducethetransmissionofequipment
noiseeminatingfromthefurnace.Thesetreatmentscan
produceaquieterinstallation,particularlyintheheated
space.However,theycanincreasethepressuredropin
theductsystem.Caremustbetakentomaintaintheproper
maximumpressureriseacrossthefurnace,temperature
riseandowrate.Thismaymeanincreasingtheductsize
and/orreducingtheblowerspeed.Thesetreatmentsmust
beconstructedandinstalledinaccordancewithNFPAand
SMACNAconstructionstandards.Consultwithlocalcodes
forspecial requirements. Forbestsoundperformance,
install all the needed gaskets and grommets around
penetrationsintothefurnace,suchasforelectricalwiring.
13
MA-200BaseInstallation
TheMA-200baseisdesignedforO.E.M.andreplacement
installationoftheCMF95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.Floorcut-outsmustbe
carefully located to avoid misalignment of the furnace
andairduct.
1.Usingthebasepan(Figure7)asaguide,locateand
markthe121/8”x121/8”openingfortheFeederDuct.
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.
3.Drilla1”diameterholeforthegas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.
4.Droptransitionduct(Figure8)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.
5.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.
6.Installthebasepanaroundthefeederduct.Securewith
2screwsintheholesneartherearofthebasepan.
7.Slitthecornersofthefeederductdowntothetopof
thebasepan(Figure9).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.
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.NOTE:Installation
onaMA-200 base mayrequire removalof thefront
portionoftherails.
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.
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.
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CMF95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/multistory
residentialor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coil,lter,and
ductwork.
LocatingtheUnit
• Surveythejobsite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 5). Physical
dimensions forthis furnace are shownin Figure 17
(page28).
• 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.
14
MA-100UniversalBaseInstallation
TheMA-100baseisdesignedprimarilyforreplacement
installation of the CMF95 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10.
1.Usingtheuniversalbaseasaguide,locateandmark
the12-1/8”x12-1/8”openingfortheFeederDuct.
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.
3.Drilla1”diameterholeforthegas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.
4.Settheuniversalbaseinplace.Droptransitionoroffset
feederduct(Figure8)upsidedownthroughtheoor
openingandcenterthetopofthefeederductin14-1/8”
x14-1/8”ooropening.
5.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
distributionduct.
6.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.
7.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
Figure10.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”)
Figure7.MA-200BasePan
FRONT
Feeder Duct
Opening
Flue
Location
24 1/8
8 3/8
12 1/8
12 1/8
9 1/8
18 1/4
Figure 8. Transition Duct
Heater Duct Below Joists
Flange
Bend
Over Tabs
Base
Floor
Joists
Slit 4 Corners
Bend Down 4 Sides
TRANSITION
DUCT
Figure 9. Feeder Duct Installation
Heat Duct Below Joists
Base
Feeder Duct
Floor
Joists
Cut This Line
Bend Over
Along This Line
1"
15
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.
8.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.
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.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.
Condensate Drainage
WARNING:
Thecondensateproducedbythefurnacemust
bedrained.Donotconnectawatersupplyto
thedrainagehoseofthefurnace.
Figure 11. Condensate Drainage
J-Trap
Drain Pipe Routed
thru Slot in Cabinet
To External Drain
Inline Drain
Assembly
Collector
Box Drain
Collector
Box Drain
CAUTION:
Donotinstalladditionaltrapsinthecondensate
drain.
• If the furnace is installed in an area where
temperaturesfallbelowfreezing,specialprecautions
mustbemadeforinsulatingcondensatedrainlines
thatdraintotheoutdoors.Ifcondensatefreezes
inthelines,thiswillcauseimproperoperationor
damage to the furnace. It is recommended that
alldrainlinesontheoutsideoftheresidencebe
wrappedwithanindustryapprovedinsulationor
materialallowedbylocalcode.
• Beforeroutingthedraintubeoutofthefurnace,loosen
thetubeclampandturnthetubesothepreset90°turn
facestheintendeddirectionofexitfromthecabinet.Do
notroutethedraintubewithoutrotatingthetuberst.
Thiswillkinkthetubeandpreventcondensatefrom
draining.
• Careshouldbetakentoroutethedrainlineawayfrom
theburnerbox.Drainlinesrestingontheburnerbox
canbecomekinkedorcollapsedduetotheheatfrom
theburnerbox.
• Thecondensatedrainmayexitthroughtheleftorright
slotsinthebottomofthefurnace(Figure11).Makesure
theexibledrainhoseisnotkinked.
• Thecondensateshoulddrainfromtheplasticcollector
boxas droplets or a small stream.If younotice the
furnacehasoperatedformorethan5minuteswithout
drainingorthestatuslightsonthecontrolboardindicates
anopenpressureswitch(Table6,page27)followthe
stepsbelow.
1.Removethecollectorboxsofttube(Figure11)and
verifytheexitfromthecollectorboxisclearofany
debrisorobstructions.
2.Replacethistubeandverifythettotheheaderspout
isairtight.Airwillbedrawnintotheheaderifthis
connectionisnottight.
3.Checkothertubeconnectionsalongthedrainsystem.
Verifythatallareairtight.
16
• 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FederalManufactured
HomeConstructions&SafetyStandard(H.U.D.Title
24,Part 3280.707[a][2]),National Fuel Gas Code
(ANSIZ223.1/NFPA54)or(CAN/CGAB149.1or.2)
Installation Codes.
• Some local regulations require the installation
ofamanualmainshut-offvalveandgroundjoint
unionexternaltothefurnaceasshowninFigure12
(page 17).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ifnotenteringthefurnacethrough
theoor.
Table8(page30)listsgasowcapacitiesforstandard
pipesizesasafunctionoflengthintypicalapplications
basedonnominalpressuredropintheline.
Thefurnaceisinstalledwithabottomgasentry.When
connectingthegassupply,provideclearancebetweenthe
gassupplylineandtheentryholeinthefurnacecasing
toavoidunwantednoiseand/ordamagetothefurnace.
TypicalgashookupsareshowninFigure12.
LeakCheck
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.
WARNING:
RISQUED’INCENDIEOUD’EXPLOSION
• Lenon-respectdesavertissementsdesécurité
pourraitentraînerdesblessuresgraves,lamort
ou des dommages matériels.
• L’installationetl’entretiendoiventêtreeffectués
par un installateur qualié, un organisme de
serviceoulefournisseurdegazstaller,service
agencyorthegassupplier.
• Ne pas entreposer ni utiliser de l’essence ni
d’autresvapeursouliquidesinammablesdansle
voisinagedecetappareil,nidetoutautreappareil.
QUEFAIRES’ILYAUNEODEURDEGAZ
• Nepastenterd’allumeraucunappareil.
• Ne toucher à aucun interrupteur électrique;
n’utiliseraucuntéléphonedanslebâtiment.
• Évacuerl’immeubleimmédiatement.
• Appelerimmédiatementlefournisseurdegazen
employantletéléphoned’unvoisin.Respecterà
lalettrelesinstructionsdufournisseurdegaz.
• Sipersonnenerépond,appelerleservicedes
incendies.
AVERTISSEMENT:
GAS SUPPLY & PIPING
FIRE OR EXPLOSION HAZARD
Failuretofollowsafetywarningsexactlycould
resultinseriousinjuryorpropertydamage.
Nevertestforgasleakswithanopename.
Use a commercially available soap solution
made specically for the detection of leaks
tocheckallconnections.Areorexplosion
mayresultcausingpropertydamage,personal
injuryorlossoflife.
WARNING:
17
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
High altitude conversion with this furnace depends on
theinstallationaltitudeandtheheatingvalueofthegas.
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/
NFPA54orNationalStandardofCanada,NaturalGas&
PropaneInstallationCodeCGAB149.1.Pleaseconsult
yourlocalcodeauthority.
The installer must indicate the furnace has been
convertedtohighaltitude.Thismaybeaccomplished
bymarkingtheratingplatewithapermanentmarker.
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furnacesareshippedfromthefactorywithorices
andgasregulatorsettingsfornaturalgasoperationatsea
levelaltitudes.At2000feet,theNFGCrequiresthatthis
appliancebederated4%foreach1000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.
Toderatethefurnacerequiresknowingtheheatingvalueof
thegasattheinstallationsite.Heatingvaluesatparticular
jobsitesvaryfortworeasons:
1.Thechemicalmixtureofthegasvariesacrossregions
andisexpressedasthe“sealevelheatingvalue”.
2.Theheatingvaluevariesbyaltitude.Forthisreason,
especially in high altitude areas, the local gas utility
speciestheheatingvalueattheresidence’sgasmeter
asthe“localvalue”.
RISQUED’INDENDIEOUD’EXPLOSION
Le non-respect des avertissements de
sécurité pourraitd’entraînerdesblessures
graves,lamortoudesdommagesmatériels.
Nejamaisutiliseruneammenueporvérierla
présencedesfuitesdegaz.Pourlavérication
de tous les joints, utiliser plutôt une solution
savonneusecommercialefabriquéespéciquement
purladétectiondesfuitesdegaz.Unincendieou
une explosion peut entraîner des dommages
matériels,desblessuresoulamort.
AVERTISSEMENT:
4
Gas Valve
Shut-Off
Valve
Elbows
Ground
Joint Union
Figure12.TypicalGasConnections
18
ConvertingtoLP/PropaneGasatAltitudes
between0&10,000FT.
WARNING:
The furnace was shipped from the factory
equippedtooperateonnaturalgas.Conversion
to LP / Propane gas must be performed by
qualied service personnel using a factory
supplied conversion kit. Failure to use the
properconversionkitcancausere,explosion,
propertydamage,carbonmonoxidepoisoning,
personalinjury,ordeath.
ConvertingsinglestagevalvestoLP/Propanerequires
the replacement of the burner orices and ipping the
regulatorcaptothesidemarkedLP.Theendfacingup
shouldnowreadLP.SeeFigure13.
WARNING:
Shutoffthegassupplyatthemanualgasshutoff
valve,beforedisconnectingtheelectricalpower.
Areorexplosionmayresultcausingproperty
damage,personalinjuryorlossoflife.Failureto
followthesafetywarningsexactlycouldresult
inseriousinjury,deathorpropertydamage.
WARNING:
Toavoidelectricshock,personalinjury,ordeath,
turnoff theelectric poweratthe disconnect
orthemainservicepanelbeforemakingany
electrical connections.
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.
InstallationExample
Elevation:.................................................. 5,000feet
TypeofGas:........................................... NaturalGas
LocalHeatingValueofGas:..............................750
FromTable10,nd750andfollowdownthecolumn,
stopatthe5,000feetrow.Theheatingvaluelistedis
LOW.Table12willbeusedtodetermineoricesizeand
manifoldpressure.
Foraddedexibility,twotableshavebeenprovidedfor
naturalgasinstallationswithhighorlowheatingvaluesat
sealevel.Tables11and12(page31)containthemanifold
pressureandoricesizestouseatvariousaltitudes.Table
11(HIGH)isfornaturalgasinstallationswithaheating
valueofmorethan1,000 Btupercubic footandTable
12(LOW)is forless than 1,000 Btu per cubic foot.To
determinewhichtabletouse:
1.Consultthelocal utility forthelocalheatingvalueat
yourinstallationsite.
2.FromTable10(page31),ndyourlocalheatingvalue
as supplied by the utility company. Follow down the
columnandstopatyouraltitudelevel.
3.IfyoursealevelheatingvalueisHIGH,useTable11
orifit’sLOW,useTable12.Seeexamplebelow.
Afterchanging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.SeeVerifyingandAdjustingtheInputRate
section(page23).
IMPORTANTNOTE:Observetheactionoftheburners
tomakesurethereisnoyellowing,liftingorashback
oftheame.
Figure13.GasValve
19
RemovingTheBurnerOrices
1.SetthethermostattotheOFFposition,oritslowest
temperaturesetting.
2.ShutOFFthegassupplyatthemanualshutoffvalve
locatedoutsideoftheappliance.
3.Turnoffallelectricalpowertotheappliance.
4.Removethedoorfromtheburnerboxbyremoving6
screws.
5.TurnthegasvalveON/OFFknobtotheOFFposition.
SeeFigure14.
6.Removethewiresfromtheterminalsofthegasvalve.
7.Removethesupplygaspipingfromthegasvalveinlet.
8.Carefullyremovefourscrewssecuringthegasmanifold
assemblytotheburnerassembly.
9.Set the screws aside and remove the gas manifold
assemblyfromtheappliance.
10.Carefully remove the burner orices from the gas
manifoldassembly.
11.Read the rating plate afxed to the appliance to
determineitsratedinput(Btu/hr)andthesizeofthe
factoryinstalledorices.
IMPORTANT: Before installing an orice, check
thesideorfaceoftheoriceforthedrillnumber
toensurethatitistheappropriatesize.
12.InstalltheappropriateLP/Propanegasburnerorices
intothegasmanifoldassembly.NOTE:Theoricesare
includedwiththefurnace. Topreventcrossthreading,
handtightentheoricesintothegasmanifoldassembly
untilsnug,thentightenwithawrench.
13.Unscrewthegasvalvepressureregulatorcapmarked
NAT.InvertthecapsoLPfacesup.Reinstallthecap
andtightenuntilsnug.MakesureLPisvisibleafter
conversion.
GasPressureVerication
MeasuringtheSupplyGasPressure
1.TurnOFFthegassupplyatthemanualvalvelocated
ontheoutsideoftheunit.
2.Usinga3/16”Allenwrench,removetheplugfromthe
inletpressuretap(INLETsideofgasvalve).SeeFigure
13(page18).
3.Installan1/8”NPTpipethreadtting,thatiscompatible
withaManometerorsimilarpressuregauge.
4.ConnecttheManometerorpressuregaugetotheInlet
PressureTap.
5.TurnONthemaingassupplyatthemanualvalve.
6.Checkand adjust the incoming gas line pressure to
11.0-14.0inchesWaterColumnforLP/Propanegas.
7.TurnOFFthegassupplyatthemanualvalve.
8.DisconnecttheManometerorpressuregauge.
9.RemovetheNPTttingandreinstalltheINLETpressure
tapplug.Handtightentheplugrsttopreventcross-
threading.Tightenwith3/16Allenwrench.
Figure14.OriceRemoval
Burner Box
Orifice
(X4)
Gas Valve
Gas Manifold
Burner Box
Door
(X4)
(X6)
WARNING:
DonotuseTeontapeorpipejointcompound
ontheoricethreads.Theholeintheorice
maybecomeblockedandcausere,explosion,
propertydamage,carbonmonoxidepoisoning,
personalinjury,ordeath.
14.Reinstall the gas manifold assembly to the burner
assemblywiththe4screws,thatwereremovedearlier.
NOTE:Itisimportantthatthecenteroftheorices
arealignedwiththecenteroftheburners.
15.Reinstalltheburnerboxdoorwiththe6screwsthat
wereremovedearlierinstep4.
16.Reconnectthegaspipingtothegasvalveinlet.
17.Reconnectthewirestothegasvalveterminals.
20
Lighting&AdjustmentoftheAppliance
WARNING:
FIRE OR EXPLOSION HAZARD
Failuretofollowsafetywarningsexactlycould
resultinseriousinjuryorpropertydamage.
Nevertestforgasleakswithanopename.Use
acommerciallyavailablesoap solution made
specicallyforthedetectionofleakstocheck
allconnections.Areorexplosionmayresult
causing property damage, personal injury or
lossoflife.
1.TurnONthemanualgasvalve,locatedontheoutside
oftheunittotheONposition.
2.Checkallgasconnectionsforleakswithasoapand
watersolution.If the solution bubblesthere is a gas
leakwhichmustbecorrected.
3.Turnontheelectricalpowertotheappliance.
4.TurnthegasvalveON/OFFknobtotheONposition.
SeeFigure13(page18).
5.Setthethermostattoapointaboveroomtemperature
tobegintheheatingcycleofthefurnace.
6.Checkthatthefurnaceignitesandoperatesproperly.
Refertotheinstallationinstructionsprovidedwiththe
unitforthenormaloperatingsequence.
7.Afterignition,visuallyinspecttheburnerassemblyto
ensurethattheameisdrawndirectlyintothecenterof
theheatexchangertube.Inaproperlyadjustedburner
assembly,theamecolorshouldbebluewithsomelight
yellowstreaksneartheouterportionsoftheame.
NOTE:Theignitermaynotignitethegasuntilallairisbled
fromthegasline.Iftheignitioncontrollocksout,turnthe
thermostattoitslowestsettingandwaitoneminutethen
turnthethermostattoapointaboveroomtemperature
andtheigniterwilltryagaintoignitethemainburners.
This process may have to be repeated several times
before the burners will ignite. After the burners are lit,
checkallgasconnectionsforleaksagainwiththesoap
andwatersolution.
MeasuringtheManifoldPressure
Themanifoldpressuremustbemeasuredbyinstallinga
pressuregauge(Manometer,MagnehelicMeter,etc.)to
theoutletendofthegasvalveasfollows:
1.Turnoffallelectricalpowertotheappliance.
2.ShutOFFthegassupplyatthemanualshutoffvalve
locatedoutsideoftheappliance.
3.Using a 3/16” Allen wrench, remove the manifold
pressuretappluglocatedontheoutletsideofthegas
valve.SeeFigure13(page18).
4.Installan1/8”NPTpipethreadtting,thatiscompatible
withaManometerorsimilarpressuregauge.
5.Connect the Manometer or pressure gauge to the
manifoldpressuretap.
6.Settheroomthermostataboveroomtemperatureto
startthefurnace.
7.Allowthe furnacetooperatefor3minutesand then
checkthemanifoldpressure.Comparethemeasured
valuewiththevalueshowninTable11(page31).
RemovingtheManometer/PressureGauge
After the manifold pressure is veried, the Manometer
orpressuregaugemustberemovedfromthegasvalve.
1.Turnthethermostattoitslowestsetting.
2.TurnOFFthemaingassupplytotheunitatthemanual
shut-offvalve,whichislocatedoutsideoftheunit.
3.TurnOFFalloftheelectricalpowersuppliestotheunit.
4.Removethepressuregaugeadapterfromthegasvalve
andreplaceitwiththe1/8”NPTmanifoldpressureplug
thathadbeenremovedearlier.NOTE:Makesurethe
plugistightandnotcross-threaded.
5.TurnONtheelectricalpowertotheunit.
6.TurnONthemaingassupplytotheunitatthemanual
shut-offvalve.
CompletingtheConversion
WARNING:
Donotalterorremovetheoriginalratingplate
fromthefurnace.
1.AfxtheLPlabelfromtheoricepackagetotherating
plate.
2.Reinstalltheappliancedoor.
3.Runtheappliancethrough3completecyclestoassure
properoperation.
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