USSC American Harvest 6500 User manual

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Please read this entire manual before installation and use of this appliance. Failure to follow
these instructions could result in property damage, bodily injury, or even death.
Contact your local building or re ofcials about restrictions and installation inspection
requirements in your area.
Save these instructions.
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Owner’s Manual
UNITED STATES STOVE COMPANY • 227 INDUSTRIAL PARK ROAD • SOUTH PITTSBURG, TENNESSEE 37380 • WWW.USSTOVE.COM
FOR TECHNICAL ASSISTANCE: PHONE: [phone] FAX: [phone]
Part No.: 851782
UNITED STATES STOVE COMPANY
“Keeping North America Warm Since 1869”
MULTI-FUEL FURNACE MODEL 6500
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American Harvest

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TABLE OF CONTENTS ..............................................................................................2
SAFETY PRECAUTIONS ...........................................................................................3
SPECIFICATIONS....................................................................................................... 4
 HeatingSpecications .....................................................................................4
 Dimensions......................................................................................................4
 ElectricalSpecications................................................................................... 4
 SafetyandEPACompliance............................................................................4
 FuelConsiderations.........................................................................................5
INSTALLATION ..........................................................................................................5
 InstallationOptions ..........................................................................................6
 FloorProtection ...............................................................................................6
 Clearances......................................................................................................7
 VentingRequirements ..................................................................................... 8
 MaximumVentingDistance ............................................................................. 8
Pellet Vent Type............................................................................................... 8
 PelletVentInstallation ..................................................................................... 8
 PelletVentTermination ....................................................................................8
 VentTerminationClearances........................................................................... 9
 ThroughtheWallInstallation ......................................................................... 10
 ThroughtheRoof/CeilingInstallation............................................................. 10
 PrimaryandSecondaryFurnaceIllustrations................................................ 11
OPERATION .............................................................................................................12
 HowYourFurnaceWorks ..............................................................................12
 DamperControlAdjustment...........................................................................12
 ControlPanel................................................................................................. 13
 UnitPreparation.............................................................................................14
 Start-UpProcedure........................................................................................14
 ShutDownProcedure....................................................................................14
 DailyOperation.............................................................................................. 15
 SafetyandConvenienceFeatures ................................................................15
MAINTENANCE........................................................................................................ 15
 ExhaustSystem.............................................................................................15
 InteriorChambers.......................................................................................... 16
 AshDisposal..................................................................................................16
 CheckandCleantheHopper ........................................................................16
 MainDoorGaskets........................................................................................ 16
 FanMotors.....................................................................................................16
 PaintedSurfaces ...........................................................................................16
 Glass..............................................................................................................16
Fall Start-Up...................................................................................................16
 SpringShutDown..........................................................................................16
 YearlyServicing ............................................................................................. 16
REPAIR PARTS DIAGRAM & LIST.....................................................................17-18
WIRING DIAGRAM................................................................................................... 19
TROUBLE SHOOTING............................................................................................. 20
ERROR CODES........................................................................................................21
FLASHING INDICATORS .........................................................................................21
NOTES .................................................................................................................22-23
Table of Contents

USSC 3
Safety Precautions
IMPORTANT:Readthisentiremanualbeforeinstalling
and operating this product.  Failure to do so may
resultinpropertydamage,bodilyinjury,orevendeath.
Properinstallationofthisfurnaceiscrucialforsafeand
efcientoperation.
Install vent at clearances specified by the vent
manufacturer.
Donotconnectthepelletventtoaventservingany
otherapplianceorfurnace.
Do not install a ue damper in the exhaust venting
systemofthisunit.
Useofoutsideairisnotrequiredforthisunit.However,
fresh air and return air make-up is required for
maximum burn characteristics and heat distribution
throughoutyourhouse.
Contact your local building officials to obtain a
permitand informationonanyadditional installation
restrictionsorinspectionrequirementsinyourarea.
Do not throw this manual away.  This manual has
important operating and maintenance instructions
thatyouwillneedatalatertime.Alwaysfollowthe
instructionsinthismanual.
Thisheaterisdesignedandapprovedasamulti-fuel,
suchascornorwoodpellets,burningfurnace.Use
onlydriedshelledcornwithamoisturecontentof11%
orless(whichprovidesthebestresults).Apellettype
fuelusedshouldhaveanashcontentof1%orless.
Ifnot,efciencywillsuffer,andyourwarrantymaybe
voided.
Never use gasoline, gasoline-type lantern fuel,
kerosene, charcoal lighter uid, or similar liquids to
startor’freshenup’areinthisfurnace.Keepallsuch
liquidswellawayfromthefurnacewhileitisinuse.
Aworkingsmokedetectormustbeinstalledinthesame
roomasthisproduct.
Donotunplugthefurnaceifyoususpectamalfunction.
TurntheON/OFFSWITCHto”OFF’andcontactyour
dealer.
Your furnace requires periodic maintenance and
cleaning(see”MAINTENANCE”).Failuretomaintain
your furnace may lead to improper and/or unsafe
operation.
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Disconnect the power cord before performing any
maintenance!NOTE:TurningtheON/OFFSwitchto
”OFF”doesnotdisconnectallpowertotheelectrical
componentsofthefurnace.
Nevertrytorepairorreplaceanypartofthefurnace
unless instructions for doing so are given in this
manual.Allotherworkshouldbedonebyatrained
technician.
Allow the furnace to cool before performing any
maintenance or cleaning. Ashes must be disposed
inametalcontainerwithatightttinglid.Theclosed
container of ashes should be placed on a non-
combustiblesurfaceorontheground,wellawayfrom
allcombustiblematerials,pendingnaldisposal.
Theexhaustsystemshouldbecheckedmonthlyduring
theburningseasonforanybuild-upofsootorcreosote.
Donottouchthehotsurfacesofthefurnace.Educate
all children on the dangers of a high-temperature
furnace.Youngchildrenshouldbesupervisedwhen
theyareinthesameroomasthefurnace.
Apowersurgeprotectorisrecommended.Thisunit
mustbepluggedintoa110-120V,60Hzgrounded
electricaloutlet.Donotuseanadapterplugorsever
the grounding plug. Do not route the electrical cord
underneath,infrontof,oroverthefurnace.Donot
routethe cordinfoot trafcareasor pinchthecord
under furniture.
Thefurnacewillnotoperateduringapoweroutage.
Ifapoweroutagedoesoccur,checkthefurnacefor
smokespillageandopenawindowifanysmokespills
intotheroom.
The feed door must be closed and sealed during
operation.
Never block free airow through the open vents of
the unit.
Keepforeignobjectsoutofthehopper.
Themovingpartsofthisfurnacearepropelledbyhigh
torqueelectricmotors.Keepallbodypartsawayfrom
theaugerwhilethefurnaceispluggedintoanelectrical
outlet.Thesemovingpartsmaybegintomoveatany
timewhilethefurnaceispluggedin.
Donotplaceclothingorotherammableitemsonor
nearthisfurnace.
Thisapplianceisnotintendedforcommercialuse.
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4 USSC
Specications
InputBTU/Hr1 50,000to105,000BTU/hr.
Heating Capacity2 1,200-2,800sq.ft.
Fuel Burn Rate3 5.0-13.0lbs./hr.
BurnTime(lowestsetting) 70hourscontinuous
HopperCapacity 320lbs

Height 43-1/8in. 
Width 28-1/2in. 
Depth 39-1/2in. 
Weight 250lbs.

1BTUoutputwillvarydependingonthequalityandtypeoffuel.UsePFIlistedfuelsforthebestresults.
2Heatingcapacitywillvarydependingonoorplanlayoutofyourhome,degreeofinsulation,andtheoutsidetemperature.
3Fuelsizemayeffecttheactualrateoffuelfeedandburntimes.Fuelfeedratesmayvarybyasmuchas20%.UsePFIlistedfuelforbestresults.
Electrical Rating 110-120volts,60HZ,9.5Amps
Watts(operational) 1150(max.approx.)

SAFETY AND EPA COMPLIANCE
YourAmericanHarvestFurnace hasbeensafetytestedandlistedtoUL391,ASTM1059,and(UM)84-HUD,byOMNI-
TestLaboratories,Inc.Portland,OregonUSA.ItisalsoexemptfromEPAPhaseIIrequirements.

USSC 5
Fuel Considerations
SHELLED CORN (Dry,preferablycornwith11%orlessmoisturecontent)
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Wetcornwillrapidlydeterioratefurnacecomponents,
reduceefciencyandvoidallwarranties.Purchaseamoisturetesterifindoubt.
Cornmustbecleanandfreefromdebris.Neverburncornrightfromtheeld.Damagecausedbydirtycornisnot
coveredbytheproductwarranty.Askforcleanbaggedcornonly.Stalkparts,excessivenesandcob
remnantswillclogtheauger.
NEVER BURN SEED CORN IN YOUR FURNACE. Seedcornistreatedwithchemicalpesticidesthatareharmful
orfatalifswallowed,therefore,seedcornisdangeroustohaveinthehouse,especiallywherechildrencanreachit.
Neverburn“DeerCorn.”Itfrequentlycontainsmolasses/sugars.
Storeyourcornsupplyinadryplaceandkeepbagsorcontainersealedtopreventyourcornfromabsorbingexcess
moisture.Testthemoisturecontentperiodicallytoensuretheproperdryness.
Therearemanyvarietiesofcorngrownaroundtheworld.Eachvarietyhasuniquecharacteristicsincludingthe
shapeandsizeofthekernel.Yourfurnacewillburnmoreconsistentlywithasmalltomidsizekernelcorn.If the
kernelsizeofthecornvariesgreatlyorifyouswitchsourcesfrequently,youwillgetalessconsistentburn. There-
fore,purchasingcornfromthesamesourcewillhelpachieveamoreconsistentburn.DO NOT USE CORN WITH
A HIGH WAX CONTENT!
Oystershellishighlyrecommendedforbestburnoperationsandtoreduceclinkerbuild-up
WOOD PELLETS
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Aswithcorn,beconsistentinyourpelletsupplier.Pelletswillvaryincontentandburncharacteristicsfromsupplier
tosupplier.Aconsistentsupplyofpelletswillresultinamoreconsistentandefcientburn.
Checkyourpelletsforforeignobjects.Yourfurnacewarrantywillnotcoverdamagedonetoyourfurnacedueto
foreignobjectsinthefuelsupply.
Storeyourpelletsinadryplacetopreventthemfromabsorbingaddedmoisture.
Todecreasesawdustbuildup,thehopperwillneedtobevacuumedoutafterevery6-8bagsofpelletsormoreoften
ifthepelletsarepoorquality.Youmayhavetoscreeneachbagofpelletsifsawdustbecomesaproblem.
WoodPelletsvaryinsizeandashcontentfromlessthan1%to3%ormore.Yourfurnacewillburnmoreefciently
withsmalltomidsizepellets.Lowashcontentpelletswillallowyoutoburnthefurnacelongerbetweencleanings.
OnlywoodpelletsmanufacturedtotheAssociationofPelletFuelIndustries(A.P.F.I.)standardforresidentialpel-
letfuelsarerecommended.Performancewillsufferifnonstandardpelletsareused.ConsultyourlocalAmerican
Harvestresellerformoreinformationonapprovedwoodpelletfuel.
CAUTION: DO NOT PLACE SUCH FUELS WITHIN THE SPACE HEATER’S INSTALLATION
CLEARANCES OR WITHIN THE SPACE REQUIRED FOR CHARGING AND ASH REMOVAL.

6 USSC
INSTALLATION OPTIONS



Asa—theunitfunctionsindependentlyofanyothersystem.The“RoomAir”blowerswillcomeon
whentheplenumandExhausttemperaturesreachapresetpointonthefurnace’scircuitboard(PCB).Unitmayalso
beusedasastand-aloneshopheater
Asa—theunitaidsanexistinggas/electricfurnacehelpingcutdownonoperationtime.
ItisrecommendedthatonlyaauthorizedtechnicianinstallyourMulti-FuelFurnace,preferablyanNFIcertiedspecialist.

Installation
IMPROPER INSTALLATION: Themanufacturerwillnotbeheldresponsiblefordamagecausedbythemal-
functionofafurnaceduetoimproperventingorinstallation.Call(800)750-2723and/orconsultaprofessional
installerifyouhaveanyquestions.
FLOOR PROTECTION
Thisunitmustbeinstalledonanon-combustibleoorsurface.Ifaoorpadisused,itshouldbeULlistedorequal.
Theoorpadornon-combustiblesurfaceshouldbelargeenoughtoextendaminimumof6-inchesinfront,6-incheson
eachside,and1-inchbehindthefurnaceforhorizontaltermination.
Floorprotectionmustextendunderand2-inchestoeachsideofthechimneyteeforaninteriorverticaltermination.
AFloorProtectorof1inchthickisrecommendedforthisinstallation.
ADDITIONAL ITEMS NEEDED FOR INSTALLATION
•ULlisted3inchor4inch(Dependingonapplication)“PL”pelletventingexhaustsystem.
•Airdistributionductwork.Transitionfrom4.5inchx18.5inchrectangleto10inchroundisprovided.
•Airlter(Optional).Size:10x20x1
•FloorProtection(Ifnotinstalledonanon-combustibleoor)
•Airreturnventfromthehousetotheroomwherefurnaceisinstalled.
•Freshairforcombustioniflocatedinasmall,tightlyconstructedroom.

USSC 7
Installation
CLEARANCES
NOTE: Distance on the left-hand side of your Multi-Fuel Furnace is set at 24 inches for suitable access to
the control panel and for fuel loading. This distance may be less, but not less than 7 inches.

8 USSC
Installation
VENTING REQUIREMENTS



Thefollowinginstallationguidelinesmustbefollowedtoensureconformitywithboththesafetylistingofthisfurnace
andtolocalbuildingcodes.



IMPORTANT! Thisunitisequippedwithanegativedraftsystemthatpullsairthroughtheburnpotand
pushestheexhaustoutofthedwelling.Ifthisunitisconnectedtoauesystemotherthanthewayexplained
inthismanual,itwillnotfunctionproperly.
MAXIMUM VENTING DISTANCE
InstallationMUSTincludeatleast3-feetofverticalpipe.Thiswillcreatesomenaturaldrafttoreducethepossibilityof
smokeorodorduringapplianceshutdownandkeepexhaustfromcausinganuisanceorhazardbyexposingpeopleor
shrubstohightemperatures.Themaximumrecommendverticalventingheightis12-feetfor3-inchtype“PL”vent.Total
lengthofhorizontalventMUSTNOTexceed4-feet.Usenomorethan180degreesofelbows(two90-degreeelbows,
ortwo45-degreeandone90-degreeelbow,etc.)tomaintainadequatedraft.
PELLET VENT TYPE
AULlisted3-inchor4-inchtype“PL”pelletventexhaustsystemmustbeusedforinstallationandattachedtothepipe
connectorprovidedonthebackofthefurnace(usea3-inchto4-inchadapterfor4-inchpipe).Use4-inchventifthe
ventheightisover12-feetoriftheinstallationisover2,500feetabovesealevel.
WerecommendtheuseofSimpsonDura-Vent®orMetal-Fab®pipe(ifyouuseotherpipe,consultyourlocalbuilding
codesand/orbuildinginspectors).DonotuseType-BGasVentpipeorgalvanizedpipewiththisunit.Thepelletvent
pipeisdesignedtodisassembleforcleaningandshouldbecheckedseveraltimesduringtheburningseason.Pellet
ventpipeisnotfurnishedwiththeunitandmustbepurchasedseparately.
PELLET VENT INSTALLATION
Theinstallationmustincludeaclean-outteetoenablecollectionofyashandtopermitperiodiccleaningoftheexhaust
system.90-degreeelbowsaccumulateyashandsoottherebyreducingexhaustowandperformanceofthefurnace.
Eachelboworteereducesdraftpotentialby30%to50%.
Alljointsintheventsystemmustbefastenedbyatleast3screws,andalljointsmustbesealedwithHI-TEMPRTV
siliconesealanttobeairtight.Theareawheretheventpipepenetratestotheexteriorofthehomemustbesealedwith
siliconeorothermeanstomaintainthevaporbarrierbetweentheexteriorandtheinteriorofthehome.
Ventsurfacescangethotenoughtocauseburnsiftouchedbychildren.Noncombustibleshieldingorguardsmaybe
required.
PELLET VENT TERMINATION
Donotterminatetheventinanenclosedorsemi-enclosedarea,suchas;carport,garage,attic,crawlspace,undera
sundeckorporch,narrowwalkway,oranyotherlocationthatcanbuildupaconcentrationoffumes.
Theterminationmustexhaustabovetheoutsideairinletelevation.
Theterminationmustnotbelocatedwhereitwillbecomepluggedbysnoworothermaterials.

USSC 9
Installation
VENT TERMINATION CLEARANCES:
A Minimum4-footclearancebeloworbesideanydoororwindowthatopens.
B Minimum1-footclearanceaboveanydoororwindowthatopens.
C Minimum3-footclearancefromanyadjacentbuilding.
D Minimum7-footclearancefromanygradewhenadjacenttopublicwalkways.
E Minimum2-footclearanceaboveanygrass,plants,orothercombustiblematerials.
F Minimum3-footclearancefromaforcedairintakeofanyappliance.
G Minimum2-footclearancebeloweavesoroverhang.
H Minimum1-footclearancehorizontallyfromcombustiblewall.
I Mustbeaminimumof36-inchesabovetheroofand24-inchesabovethehighestpointoftheroofwithin10-feet.
VENTTERMINATIONCLEARANCES

10 USSC
Installation
THROUGH THE WALL INSTALLATION (RECOMMENDEDINSTALLATION)
Toventtheunitthroughthewall,connectthepipeadaptertotheexhaustmotoradapter.Iftheexhaustadapterisatleast
18-inchesabovegroundlevel,astraightsectionofpelletventpipecanbeusedthroughthewall.
Yourfurnacedealershouldbeabletoprovideyouwithakitthatwillhandlemostofthisinstallation,whichwillinclude a
wallthimblethatwillallowtheproperclearancethroughacombustiblewall.Onceoutsidethestructure,a3-inchclearance
shouldbemaintainedfromtheoutsidewallandacleanoutteeshouldbeplacedonthepipewitha90-degreeturnaway
fromthehouse.Atthispoint,a3-foot(minimum)verticalsectionofpipeshouldbeaddedwithahorizontalcap,which
wouldcompletetheinstallation.
Asupportbracketshouldbeplacedjustbelowtheterminationcaporoneevery4-feettomakethesystemmorestable.
Ifyouliveinanareathathasheavysnowfall,itisrecommendedthattheinstallationbetallerthan3-feettogetabovethe
snowdriftline.Thissameinstallationcanbeusedifyour furnace isbelowgroundlevelbysimplyaddingtheclean-out
sectionandverticalpipeinsideuntilgroundlevelisreached.Withthisinstallationyouhavetobeawareofthesnowdrift
line,deadgrass,andleaves.Werecommenda3-footminimumverticalriseontheinsideoroutsideofthehouse.
The“throughthewall”installationistheleastexpensiveandsimplestinstallation.Neverterminatetheendventundera
deck,inanalcove,underawindow,orbetweentwowindows.WerecommendSimpsonDura-Vent®orMetal-Fab®kits.
THROUGH THE ROOF/CEILING INSTALLATION
Whenventingthefurnacethroughtheceiling,thepipeisconnectedthesameasthroughthewall,excepttheclean-out
teeisalwaysontheinsideofthehouse,anda3-inchadapterisaddedbeforetheclean-outtee.
Youmustusetheproperceilingsupportangesandroofashing(suppliedbythepipemanufacturer;followthepipe
manufacturer’sdirections).Itisimportanttonotethatifyourverticalrunofpipeismorethan15-feet,thepelletventpipe
sizeshouldbeincreasedto4-inchesindiameter.
Donotexceedmorethan4-feetofpipeonahorizontalrunanduseasfewelbowsaspossible.Ifanoffsetisrequired,
itisbettertoinstall45-degreeelbowsratherthan90-degreeelbows.
1 Vertical Cap
2 StormCollar
3 AdjustableRoofFlashing
4 CathedralCeilingSupportBox
5 Pipe
6 45°Elbow
7 90°Elbow
8 HorizontalCap
9 WallThimble
10 BlackCeilingSupportFirestopSpacer
11 SingleTeewithClean-OutAdapter
12 TeeSupportBracket
13 DoubleTeewithClean-OutAdapter