Miller CMF2 Installation guide

Type
Installation guide
CMF2 80-PG CONVERTIBLE (65, 75, & 85 KBTU/H INPUTS)
CMF2 80-PO CONVERTIBLE (65, 75, & 85 KBTU/H INPUTS)
Counterflow Gas or Oil Heating Appliance
INSTALLATION INSTRUCTIONS
DO NOT DESTROY. KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.
FIRE OR EXPLOSION HAZARD
• 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.
WARNING:
ATTENTION INSTALLERS:
It is your responsibility to know this product better
than your customer. This includes being able to install
the product according to strict safety guidelines and
instructing the customer on how to operate and maintain
the equipment for the life of the product. Safety should
always be the deciding factor when installing this
product and using common sense plays an important
role as well. Pay attention to all safety warnings and
any other special notes highlighted in the manual.
Improper installation of the furnace or failure to follow
safety warnings could result in serious injury, death,
or property damage.
These instructions are primarily intended to assist
qualified individuals experienced in the proper
installation of this appliance. Some local codes require
licensed installation/service personnel for this type of
equipment. Please read all instructions carefully before
starting the installation. Return these instructions to
the customer’s package for future reference.
For installation in:
• ManufacturedHomes
• RecreationalVehicles,Park Models,& Manufactured
Buildings
• ModularHomes/Buildings
2
TABLE OF CONTENTS
ImportantSafetyInformation ....................................3
Requirements&Codes ..............................................3
MinimumInstallationClearances ..............................4
CombustionAir&VentingRequirements ................5
General Information ...................................................6
CombustionAirQuality ..............................................6
DirectVentFurnaces .................................................7
ManufacturedHousingInstallations .......................7
Residential Installations .........................................7
VentingthroughaChimney .......................................8
VentiaireIIIorIVAirQualityPackage .......................8
CirculatingAirRequirements ....................................9
Plenums&AirDucts .................................................9
SupplyAirConnections ..........................................9
Dampers ................................................................9
Unconditioned Spaces ..............................................9
ClosetInstallations ....................................................9
FurnaceFilter ..........................................................10
Furnace Installation ..................................................10
General Information .................................................10
BeforeYouInstallthisFurnace ................................10
Locating the Unit .....................................................10
MA-200BaseInstallation ........................................11
InstallingthefurnaceonanMA-200Base ..............12
MA-100UniversalBaseInstallation ........................12
InstallingthefurnaceonanMA-100Base ..............12
CombustionAirDuct/PipeInstallation ...................13
SRJ Roof Jack Installation ......................................13
Damper Installation .................................................14
CB-200ACottageBaseInstallation ......................... 14
Fuel Connections .....................................................15
GasPiping-PGSeriesOnly ...................................15
LeakCheck ..........................................................15
HighAltitudeApplication ......................................16
ConvertingtoLPGas ........................................... 16
OilPiping-POSeriesOnly .....................................17
FuelLineHook-up:SingleLineSystem ...............17
FuelLineHook-up:TwoLineSystem ...................17
Hook-upProcedure ..............................................17
EliminatingAirLeaks ...........................................17
FuelOilType ........................................................17
Electrical Connections ............................................. 18
Pre-ElectricalChecklist ...........................................18
LineVoltage ............................................................. 18
WiringConnections .................................................18
Grounding................................................................18
ThermostatConnections .........................................19
HeatAnticipator ...................................................19
Blower Speed ..........................................................19
ConstantBlowerOperation ..................................19
Startup&Adjustments ............................................20
Important Safety Information ...................................20
Pre-StartChecklist ..................................................20
RefrigerantCharging ...............................................20
OperatingInstructions-PGDirectIgnition .............. 20
ShuttingOfftheGasSupply ................................20
CheckingtheInputoftheFurnace .......................21
CheckingtheInletGasLinePressure .................. 21
CheckingtheManifoldPressure ..........................21
AdjustingtheManifoldPressure ..........................21
Installing the Pressure Gauge .............................. 21
AdjustingtheBurner ............................................21
OperatingInstructions-POOilBurners .................. 22
Start-upProcedure...............................................22
AirBleed-SinglePipeInstallation .........................22
OilBurnerShutdownProcedure ..........................22
FlameAdjustment ................................................22
Electrode Setting .................................................. 22
Switching from Interrupted to Intermittent
IgnitionControl .....................................................22
FiringRateConversion ............................................23
OperatingSequence .................................................23
PGGasFurnaces ...................................................23
POOilFurnaces ......................................................23
Troubleshooting ........................................................24
PGDirectIgnition-GasGun...................................24
POOilFurnace .......................................................25
ControlModuleStatusIndicator ..............................26
ComponentFunctions .............................................26
Unit Maintenance ...................................................... 27
Figures&Tables ....................................................... 28
Figure18.CMF2PhysicalDimensions ................ 28
Figure19.CMF2WiringDiagram ......................... 29
Figure20.FurnaceComponentLocation ............. 30
Installation/PerformanceChecklist ....................... 32
3
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.
PROPOSITION 65 WARNING: This product
contains chemicals known to the state of
Californiatocausecancer,birthdefectsor
otherreproductiveharm.
WARNING:
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.
• Allmanufacturedandresidentialhousinginstallations
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).Residentialinstallationsmust
alsoconformtothestandardforChimey’s,Fireplaces,
Vents,&SolidFuelBurningAppliances(NFPA211).
• 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
specified on page 4.
• Provideadequatecombustionandventilationairtothe
furnacespaceasspeciedonpages5-8.
• Provideadequateclearancesaroundtheventairintake
terminalasspeciedinFigure1(page8).
• Combustion products must be discharged outdoors.
Connectthisfurnacetoanapprovedventsystemonly,
asspeciedonpages7-8.
• Never test for gas leaks with an open ame. Use a
commercially available soap solution to check all
connections.Seepages15-16.
• Thisfurnaceisdesignedtooperatewithamaximum
external pressure rise of 0.5 inches of water column.
ConsultTable6(page19),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.
• Whensupplyductscarryaircirculatedbythefurnace
to areas outside the space containing the furnace, the
return airshall also behandled byduct(s)sealed to
the furnace casing and terminating in the conditioned
space.Seepages9-10.
• Thisfurnacemaynotbeusedfortemporaryheatingof
buildings or structures under construction.
4
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
sufficient 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.
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 filter,
blower assembly, burner assembly, controls, and vent
connections.
• Locateandinstallthisunitinpositionasspeciedon
pages10& 11.This unit isdesigned only forIndoor
installations and should be located with consideration
of minimizing the length of the supply and return ducts.
Table1.MinimumClearanceRequirements
INSTALLATION CLEARANCES
CLOSET ALCOVE
Front* 6" 18"
Rear 0" 0"
Sides 0" 0"
To p 17" 17"
Duct w/in 3ft of furnace 1/4" 1/4"
Vent 6” 6”
Plenum 1" 1"
Roof Jack Barrel 0” 0”
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
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
5
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
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/CGA-B149.1 and .2–M00 National
StandardofCanada.(NSCNGPIC)
• 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:
200 in
2
(1290cm
2
)forfurnaceonly.Mayalsoinclude
return air grille and frame assembly P/N 902989 or wall
mount grille P/N902999).
235 in
2
(1516cm
2
)with4tonA.C.orH.P.installed.
250 in
2
.(1613cm
2
)with4tonA.C.orH.P.installed&
1”specialclearance.
390 in
2
(2516cm
2
)withupto5tonA.C.orH.P.installed.
COMBUSTION AIR & VENTING
REQUIREMENTS
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.
WARNING:
6
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).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.ConsultwithB149.1andlocalcodeofcials
forCanadianinstallations.
Dependingonthetypeofinstallation(SeeTable1),the
CMF2Seriesfurnacecandrawcombustionairfromoutside
thehome(directvent)orfromthespacebeingconditioned.
These high quality, direct vent furnaces are used for
manufactured housing, recreational vehicle, and residential
applications. They are certified to the UL307 standards
(UL307-Aforoilmodels;UL307-Bforgasmodels),and
can be installed in a variety of applications, as shown in
Table 2.
TheCMF2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
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. NOTE:Thissafetydevice
(LP) gas. The ring rate of the CMF2 80 Convertible
Seriescanbeeld-installedusingacertiedNORDYNE
conversion kit by a qualified service technician. Refer to
page 6 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.
TYPE OF
INSTALLATION
FURNACE
BASE
TYPE OF
EXHAUST
DUCTED
APPLICATION
DIRECT VENT
SYSTEM REQUIRED
ManufacturedHousingor
RecreationalVehicle
MA-100orMA-200
Universal Base
NORDYNESRJ
RoofjackOnly
Ye s Ye s
Residential
MA-100orMA-200
Universal Base
NORDYNESRJRoofjack
oranExistingChimney*
Ye s Ye s
Residential
CB-200ACottageBase
NORDYNESRJRoofjack
oranExistingChimney*
Ye s Ye s
Residential
CB-200ACottageBase
NORDYNESRJRoofjack
oranExistingChimney*
No No
†Residentialisdenedasasingle-storynon-manufacturedhousinginstallation.
*ConsulttheVentingRequirementssection(page#)formoredetailsonproperlyventingthisappliancethroughanexistingchimney.
Table2.CMF2InstallationTypes
7
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
specified in the Replacement Parts List provided online.
The combustion air from the outside needs to be clear of
chemicals that can cause corrosion. Excessive exposure
to contaminated combustion air will result in safety and
performance related problems. The list below are examples
of chemical contaminants found in a wide variety of some
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
2
of free area should be
installed outside and completely unobstructed. When using
the combustion air duct, make sure it extends through
theoor.Whenusingthedirectventkit,thecombustion
air opening must be located in the same pressure zone
astheueexitoftheroofjackorchimney.Refertothe
instructions provided with the kit for more information.
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 confined or unconfined space.
Fordirectventapplications,eitherthecombustionairduct
providedwiththeMASeriesbasekitorthedirectventkit
can be used. The direct vent kit must be ordered separately.
OnlyforaspecialCB-200Acottagebaseinstallationcan
theCMF2drawthecombustionairfromtheconditioned
space.TheCB-200Acottagebasekitmustbeordered
separately. Refer to the replacement parts listing provided
with the furnace to order the direct vent kit or 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,
confined spaces, tight construction or similar situations
in which the combustion air requirements of the furnace
might not be met, a direct vent system must be used.
ManufacturedHousingInstallations
For all manufactured housing applications, the CMF2
furnace must be vented using the SRJ series roofjack.
The instructions for selecting the proper roofjack for your
installation are detailed later in these instructions.
Residential Installations
WARNING:
This furnace must never be connected to a
chimney ue serving a separate appliance
designedtoburnsolidfuel.
For residential applications (See Table 2), the CMF2
furnace may be vented through the SRJ series roofjack
or through an existing chimney. Figure 10 (page 14)
displays instructions for selecting the proper roofjack for
your installation. If venting through an existing chimney,
the venting system must be in accordance with these
instructions, all applicable local building codes, the National
FuelGasCode(ANSIZ223.1/NFPA54),theInstallation
ofOil-BurningEquipmentstandard(ANSI/NFPA31),and
thestandardforChimneys,Fireplaces,Vents,andSolid
Fuel-BurningAppliances(NFPA211).
WARNING:
When venting through a chimney, check the
chimney for soot, leaks, obstructions, and
proper installation.
The materials used to construct the venting system must
be capable of withstanding exposure to temperatures
of at least 700° F.The existing chimney servicing this
furnace must be vertical. Horizontal distances to an
existing chimney must be as short as possible, and the
connecting pipe must slope upward to the chimney at not
less than a 45° angle. The total length of the sloping pipe
must not exceed 6 ft. The venting system must have no
obstructions or sharp bends where soot and other foreign
matter can accumulate.
If an inspection determines that the chimney is obstructed,
thechimneymustbecleanedandtheconnectinguepipe
must be cleaned or replaced.
If venting a CMF2 power oil furnace into an existing
chimney, a barometric damper can be installed at the
vent connection of the furnace to regulate the draft. The
barometric damper must be properly installed per the
manufacturer’s instructions. Refer to all applicable codes
to determine whether or not a barometric damper can
be used for your CMF2 power oil furnace installation.
The barometric damper used must be installed such
that air from the conditioned space can only enter the
uepassageway.Donotuseadoubleactingbarometric
8
damper.Alluepipejointsshouldbefastenedwithsheet
metal screws for rigidity.
The chimney height, required draft, and number of
appliances served by the chimney must be in accordance
with all applicable codes. To prevent down draft, the
chimney should extend at least 2 feet above the peak of
theroof.SeeFigure1.
Itisrecommendedthatthefurnaceueservenoother
appliances. When the chimney serves only the furnace, the
ueareamustbesizedaccordingtoallapplicablecodes.
Theminimuminternalareaoftheuemustbeequaltoat
leasttheareaofthefurnaceueexit. When two or more
appliancesmustventthroughacommonue,thearea
ofthecommonueshouldbesizedinaccordancewith
all applicable codes.
When an existing furnace is removed or replaced in a
venting system, the venting system may not be properly
sized to vent the attached appliances. The venting system
must be checked to ensure proper venting. Improperly sized
venting systems can result in the formation of condensate,
leakage, spillage, etc. Refer to the National Fuel Gas
Code (ANSI Z223.1/NFPA 54), and the Installation of
Oil Burning Equipment standard (ANSI/NFPA 31) for
correcting improper venting systems.
VentingThroughaChimney
WhenventingtheCMF2throughanexistingchimney,the
materials, sizing, and installation of the chimney must be
inaccordancewiththeANSIZ223.1/NFPA54,(National
FuelGasCode),ANSI/NFPA31(InstallationofOilBurning
Equipment),NFPA211(Chimneys,Fireplaces,Vents,and
SolidFuel-BurningAppliances)andallapplicablelocal
codes. The materials used must be capable of withstanding
exposuretotemperaturesofatleast700°F.TheCMF2
powergasunitsarefan-assisted.
VentilaireIIIorIVAirQualityPackage(Accessory)
CAUTION:
MAINTAIN 2 1/2” MINIMUM CLEARANCE
BETWEEN FLUE PIPE AND FLEX DUCT. FAILURE
TO COMPLY WITH THIS RESTRICTION COULD
CAUSE EQUIPMENT DAMAGE. VENTILAIRE III
ILLUSTRATED OTHER LISTED VARIATIONS
AVAILABLE. CHECK WITH MANUFACTURER.
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 ASSY.
ROOF CAP ASSY.
FLEX DUCT
CEILING TRIM COLLAR
CONNECTOR
DRAW BAND
DRAW BAND
FURNACE
Figure1.TypicalInstallation
VentilAireIII
VentilAireIV
Figure 2. VentilAire III & IV
9
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 return
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 fit
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3(page10).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 specified 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
10
materials, fixtures, 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 affix a prominent
marking on or near the appliance where it is easily
read when the closet door is open. The marking shall
read:“CAUTION, 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
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”.Adjust
duct registers to obtain a temperature rise within the
range specified on the furnace nameplate.
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.
• CMF2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 filter is secured to the door with
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CMF2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
specifications contained in these instructions and other
documents supplied with the furnace and/or optional air
conditioning equipment. Unless it is noted differently in this
manual, only use factory authorized kits and accessories
when modifying this appliance. Refer to local authorities
having jurisdiction for further information.
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 filed 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, filter, 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.
Figure 3. Closet Installation
a retaining bracket. It is recommended that the filter be
cleaned or replaced monthly. Newly built or recently
renovated homes may require more frequent changing
until the construction dust has minimized.
• Replacement filters are available at most local retailers.
Inspect filters frequently and replace when necessary
with filter of same dimensional size. Filtersdesignedto
remove smaller particles such as pollen, may require
additional maintenance.
11
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
12 1/8
9 1/8
18 1/4
MA-200 Base Installation
TheMA-200baseisdesignedforO.E.M.andreplacement
installationoftheCMF2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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 fit 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.
• 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 18
(page29).
• 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.
Figure 5. Transition Duct
Heater Duct Below Joists
Flange
Bend
Over Tabs
Base
Floor
Joists
Slit 4 Corners
Bend Down 4 Sides
TRANSITION
DUCT
Figure6.FeederDuctInstallation
Heat Duct Below Joists
Base
Feeder Duct
Floor
Joists
Cut This Line
Bend Over
Along This Line
1"
12
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.
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 CMF2 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 distribution 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.
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.
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”)
13
CombustionAirDuct/PipeInstallation
TheCMF2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.SeeTable2(page
6)forspecialcombustionairinstallations. NOTE: If using
the direct vent kit, the kit must be installed before the
furnaceispositioningonthebase.Followtheinstructions
provided with the 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.
3. Insert the vent pipe into the bottom of the roof jack with
locking slot pointed towards furnace. Slide the pipe
into the roof jack to a length that allows convenient
reach to the connection at the top of the furnace.
4. Ease the roof jack assembly through the openings.
NOTE: The lower portion of the outer barrel must
extend through the finished ceiling as indicated on the
barrel. Use sealant or caulking on the roof or adaptor
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Figures
10&11(page14).
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: 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.
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14)todetermineappropriateSRJroof
jack and accessories required for your installation. Install
only SRJ series roof jack as specified on the furnace label.
NOTE: Aroofjackadaptorisrequiredforslopedroofs.
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 roofing
nails or screws on wood construction or sheet metal
screws on metal roofs.
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
14
Figure 11. Vent Pipe Installation
VENT PIPE
FLUE PIPE
OF FURNACE
TURN TO LOCK-
TIGHTEN SCREW
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
7'
-28
7'6"
-34
8'
-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
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 fit 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.
CB-200A Cottage Base Installation
TheCMF2canbeinstalledonaCB-200Acottagebase
incertainapplications,aslistedinTable2(page6).Refer
to the Replacement Parts List for information on ordering
thisbase.Forinstallation,refertotheinstructionsthatare
providedwiththeCB-200Abasekit.
Figure10.RoofJack
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
15
FUEL CONNECTIONS
• 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/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.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CMF2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 using
the gas piping chart, shown in Table 3. 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.
Table3liststhegasowcapacitiesforstandardpipesizes
as a function of length in typical applications based on
nominal pressure drop in the line.
Gaspiping-PGSeriesOnly
Table3.PipeLengthSelectionChart
TypeofPipe
MaximumPossiblePipe
LengthRequiredfor
DifferentPipeDiameters
1/2” 5/8” 3/4” 1”
Black Iron Pipe for Natural Gas 20’ - 60’ 100’
AluminumorCopperTubingfor
Natural Gas
10’ - 30’ -
AluminumorCopperTubingfor
LP Gas
- 40’ 100’ -
LeakCheck
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:
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
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:
16
joint or union using a small paintbrush. If any bubbling is
observed, the connection is not sealed adequately and
must be retightened. Repeat the tightening and soap
check process until bubbling ceases.
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.
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CMF2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12(page17)
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
orifice assembly.
11. Remove the main orifice and replace it with the correct
LP fuel orifice as shown in Table 4. Refer to the rating
plate on the furnace to determine the firing rate for
your application. NOTE: If the firing rate of your furnace
has been converted, make sure the appropriate LP
orifice for the new firing rate is installed.
12. Remove the regulator converter on top of the gas valve.
Invert the converter so that the red ring will be located
at the bottom and the LP stamping on the converter
appears up.
13. Screw converter back into the regulator, hand tight
plus 1/8 turn.
14. Reinstall the burner assembly into the furnace.
15. Reconnect the gas piping and electrical wires to the
gas valve.
16.Openthemanualshut-offvalveandfollowtheOperating
Instructions outlined on page 20.
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CGA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CMF2 furnaceisshippedfromthe factorywithits
orifices 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 orifice 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 orifice size and raise the manifold pressure back to
3.5inWC.
Afterchangingtheregulatorpressureortheorices,itis
* 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ameterdialsizeof1cubicfoot.
** TimesarebasedonLPgasatanaverageof2,500BTUpercubicfoot,aburnermanifoldpressureof3.5inWC,andameterdialsizeof1cubicfoot.
Table4.Natural&LPGasOrices
Burner
Designation
Firing Rate
Input (BTUH)
Natural Gas
Orice Number
Natural Gas
TimePerRev.* (sec)
LP Gas
Orice
Number
LP Gas
Time PerRev.** (sec)
GasGun-65-DI-S 65,000 24 55 43 138
GasGun-75-DI-S 75,000 20 48 40 120
GasGun-90-DI-S 85,000 18 43 37 106
17
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 satisfied, where they apply, for an approved installation.
• Use a tank capacity suitable for the application with a
weatherproof, capped fill opening and shielded vent to
let air in as fuel is used. NOTE: The inside of the tank
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
specific 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 filled 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.
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(page18).
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
fittings 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.
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.
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.
Figure12.LP&NaturalGasConversion
Orifice
Inlet
U-Shaped
Manifold
Regulator
Converter
Gas Control Knob
18
• 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 specifications 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5(page19)for
proper high and low voltage wiring.
Verifyfactorywiringisinaccordancewiththeunitwiring
diagram(Figure18,page29).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 outdoor 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5(page19)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.
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.
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.
WARNING:
ELECTRICAL CONNECTIONS
Figure13.RecommendedTankHook-Up
200-300GallonTank
19
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 fireplaces,
sunlight, or lighting fixtures, and convective heat from
warm air registers or electrical appliances. Refer to the
thermostat manufacturer’s instruction sheet for detailed
mounting and installation information.
• Theheatanticipatorofthethermostatshouldbeadjusted
to .4 amps for power oil models, and .9 for power gas
direct ignition models.
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CMF2furnaceisequippedwitha3speedPSCmotor
thatispre-setatthefactoryforHIGH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 configuration. Table 6 lists the proper circulating air
owandtemperaturerisefortheCMF2furnace.
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.
NOTE: This is the factory default setting and should not
be changed if high speed operation is desired.
• Medium Speed Operation:Connect the black wire
from the fan switch to the blue wire of the blower motor.
• 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.
CMF 80 PG
Convertible
CMF 80 PO
Convertible
FactorySetFiringRate(btu/hr)* 75,000 75,000
HeatingCapactiy(btu/hr) 56,000 60,000
KitConvertedFiringRate(btu/hr)**
65,000
or
85,000
65,000
or
85,000
AFUERating(%) 75+ 80+
OriceNumber(NaturalGas) 20 N/A
OriceNumber(PropaneGas) 40 N/A
BurnerNozzleforOil N/A 0.60gph;A;80
o
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 6.0 6.0
FuseorBreaker 15Amps 15Amps
Nom.AnticipatorSetting 0.6 0.6
TemperatureRiseRange(
o
F) 55
o
-85
o
55
o
-85
o
NOTES:
Electrical:Allmodelsare115volt,60Hz,1phase.Thermostat
circuitis24V,60Hz,15VAC.
Gasconnections:1/2”NPT.
AFUE=AnnualFuelUtilizationEfciency
* 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80Convertibleseriesfurnacescanbe
changed using an approved conversion kit.
Table5.CMF2Specications
Table6.CMF2AirowData
External
Static
Pressure
(in WC)
Airflow (CFM)
Lowspeed
For
65Kbtu/hInput
MediumSpeed
For
75Kbtu/hInput
HighSpeed
For
85Kbtu/hInput
0.1 730 920 1000
0.2 690 880 960
0.3 650 840 900
0.4 610 780 860
0.5 560 740 810
0.6 510 690 760
20
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doesnotexceed
10.0inchesofW.C.,andisnotlessthan4.5inchesW.C.
fornaturalgas.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hasbeenpurged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knog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.
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:
START-UP & ADJUSTMENTS
ImportantSafetyInformation
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.
• 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 qualified service
technician.Forceorattemptedrepairmayresultina
fire or explosion.
• Shouldoverheatingoccur,orthegassupplyfailtoshut
off,turnthemanualgasvalvetotheapplianceOFF.
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Miller CMF2 Installation guide

Type
Installation guide

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