USSC 4027 User manual

USSC 1
CAUTION:
READALLINSTRUCTIONSCARE-
FULLY BEFORE STARTING THE
INSTALLATION OR OPERATING
THE HEATER
IMPROPER INSTALLATION MAY VOID
YOUR WARRANTY
DO NOT USE THIS HEATER
IN A MOBILE HOME OR TRAILER
851523
CRUS
UNITED STATES STOVE COMPANY
227 Industrial Park Road
P.O.Box 151
South Pittsburg, TN 37380
[phone]
Owner’s
Manual
4027 & ASA7
Free-Standing Coal Heater
This is a COAL ONLY Room Heater
Tested to: UL 1482 and CAN/ULC S627-M93
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2USSC
SAFETY PRECAUTIONS
PLEASEREADTHISENTIREMANUALBEFOREYOUINSTALLANDUSEYOURNEWHEATINGAPPLIANCE.FAIL-
URETOFOLLOW INSTRUCTIONS MAYRESULTINPROPERTY DAMAGE,BODILYINJURY, OREVENDEATH.
THISHEATING APPLIANCE SHOULD BE INSTALLED ONLY BY AN EXPERIENCED COAL HEATER INSTALLER. IF
THISHEATINGAPPLIANCEIS NOTPROPERLYINSTALLED,AHOUSE FIREMAYRESULT. TOREDUCETHE RISK
OFFIRE,FOLLOW THEINSTALLATIONINSTRUCTIONS. CONTACTLOCAL BUILDINGORFIREOFFICIALS ABOUT
RESTRICTIONSANDINSTALLATION INSPECTIONREQUIREMENTSIN YOURAREA.
THIS HEATING APPLIANCE IS DESIGNED TO BURN COAL. THE USE OF ANY OTHER FUEL EXCEPT FOR COAL
IGNITIONISA VIOLATIONOFFEDERALLAW. BURN COALONLY.
INSTALLSMOKEDETECTORS INYOURHOME. EACHSMOKE DETECTORSHOULDBEINSPECTED REGULARLY
ANDKEPTINGOOD WORKINGCONDITION.
SAVETHESEINSTRUCTIONS. THESEINSTRUCTIONS SHOULD BEREVIEWEDBYALL FUTURE USERSOFTHIS
HEATINGAPPLIANCETO ENCOURAGEITSPROPEROPERATION ANDMAINTENANCE.
SAFETY STANDARDS AND BUILDING CODES
Thisappliancehasbeensafetytested in accordance withULsafetystandard1482byWarnock Hersey, a company inthe
Quality Systems Division of Intertek Testing Services which is an international conformity assessment organization with
NorthAmericanheadquartersand offices worldwide. The WarnockHerseylistingmarkon this appliancesignifiesthatthe
design and manufacturing of this appliance comply with Intertek Testing Services' comprehensive safety assessment
standards for solid fuel type room heaters. (There may be additional requirements to be met in order to comply with local
buildingcodesorregulations. Before installingthisappliance,check with buildingorfireofficials toassurecompliancewith
localcodesandregulations.)
MATERIALS NEEDED FOR PROPER INSTALLATION
THEFOLLOWINGMATERIALSARENEEDEDTOPROPERLYINSTALLTHISHEATERINARESIDENTIALTYPEHOME.
THE CHIMNEY USED MUST BE CAPABLE OF PROVIDING A MINIMUM OF .06 INCHES WATER COLUMN DRAFT.
1. ChimneyConnector(alsoknown asstovepipe):The chimney connectorjoinstheheater tothechimney. Thechimney
connectorpipesshould be 6-inchesindiameter 24-gauge minimumblacksteel. (Note: Thenumber of 90degreebendsin
thechimneyconnectorinstallation for appliances, suchasthisheater,which have atopexitfluecollar should be restricted
to one. More than one 90 degree bend in the chimney connector could negatively affect chimney draft.)
2. Chimney: A code-approved masonry chimney. See the "MASONRY CHIMNEY REQUIREMENTS" portion of this
manualfordetails. OR
A chimney complying with the requirements for Type 103-HT chimneys in the Standard for Chimneys, Factory Built,
Residential Type and Building Appliance, UL 103. See the "METAL PREFABRICATED CHIMNEY REQUIREMENTS"
portion of this manual for details.
3. Wall Thimble: A manufactured or site constructed device installed in combustible walls through which the chimney
connector passes to connect to a masonry chimney. The wall thimble is intended to keep walls from igniting. A wall
thimbleisneeded onlyifthechimney connectormustpass throughacombustiblewall betweentheheaterand themasonry
chimney. See Figure 5 for wall thimble options.
4. FloorProtector: Ifthefloor on which theheateristobe installed iswoodoranyother combustible material ,theheater
mustbeplacedon a floor protector. Thefloorprotectoristo prevent thefloorfromcatchingfire from sparks orembersthat
might escape the heater or drop from the joints of the chimney connector pipe. The floor protector must protect the floor
beneathandaround theheaterand chimneyconnectorpipeasshowninFigure 9. Thefloorprotector forthisheater maybe
larger thanthefloorprotectorshowninFigure9butitmustnotbesmallerthanthefloorprotectorshowninFigure9. The
floor protector must be a listed floor protector or a floor protector made of noncombustible inorganic material equal to or
better than 3/4-inch thick material having a thermal conductivity R value of 1.5.
5. Chimney Shield: See step 11 of the "TO INSTALL THE HEATER" portion of this manual for details.
THIS HEATER IS NOT APPROVED FOR MOBIL HOME INSTALLATION.
HOTWHILEINOPERATION. KEEPCHILDREN, CLOTHINGAND FURNITUREAWAY. CONTACTMAYCAUSESKIN
BURNS.DONOT USE CHEMICALSOR FLUIDS TOSTART THE FIRE.DO NOT BURNGARBAGEOR FLAMMABLE
FLUIDS. DO NOT CONNECT TO ANY AIR DISTRIBUTION DUCT SYSTEM.

USSC 3
Before Assembly, inspect the heater thoroghly for
missing parts or shipping damage. If any damage or
missingpartsare detected,reportit toyourheater dealer.
DO NOT INSTALL OR USE A DAMAGED OR
INCOMPLETE HEATER
Shaker Handle Assembly:
1. First, remove the two(2) bolts from the left side of the
unit where the shaker handle is to be mounted.
2. Next, spin the shaker plate (a) counteclockwise until
itstops.Slidetheshaker handle through theholeandon
to the shaker grate. NOTE: Make sure that the shaker
handle is in a 90 degree position and that the shaker
grates are lying flat.
3. Rotate the shaker plate (a) clockwise until it touches
theunit.Thengive itanother1/2turn oruntilthe mounting
holes coincide with the unit.
4. Attach to the unit with the bolts removed in step 1.
5. Screw one(1) of the spring handles, from the parts
box,ontothe shaker handle3/4”-1”down in aclockwise
motion.
Feed & Ash Door Assemblies:
FeedDoor-
1. Screw one(1) of the spring handles, from the parts
box, on to the Feed Door handle.
AshDoor-
1. Screw one(1) of the spring handles, from the parts
box, on to the Feed Door handle.
2. Insertthe2-1/2”CarriageBolt into the spin damper.
3. Then screw it in into the Ash Door as shown and At-
tach the Lock Nut provided to the Carriage Bolt.
Flue Collar Assembly:
1. Mountthefluecollar to thetopofthe unit usingthe(3)
5/16-18x1-1/2bolts, (3) washers,and(3)weld tabs pro-
vided in the parts box as shown
ASSEMBLY
(A)
Side view of flue collar
mount to heater top

4USSC
FIGURE 1 -
MASONRYCHIMNEY
REQUIREMENTS
FLUE
MINIMUM 1/2" AIR SPACE
FOUNDATION
CHIMNEY WALL 4"
NOMINAL
5/8" FIRECLAY OR
STAINLESS STEAL
FLUE LINER
If the heater is to be connected to a masonry chimney, the heater should not be installed until it is determined that the
chimneyissafeforuse. Beforeinstalling the heater, havethechimneyinspectedbyabuilding inspector, fire department,
orqualifiedheatingengineer. Toprevent risk of walls,roof,orothercombustibles catching fire fromtheextremelyhotfire,
smoke,andfluegases,andtoobtain a proper draw, a chimneymustmeettheminimumstandardsfor masonry chimneys
establishedbytheNational Fire Protection Association(NFPA). Makecertaintheinspection agency isfamiliarwithNFPA
No. 211 and all local codes. Some of those minimum standards are listed here for your convenience.
1. The chimney must not be obstructed or clogged. An obstructed or clogged chimney could cause smoke and the
dangerous carbon monoxide in smoke to spill back into your home.
2. Your masonry chimney must be supported on an adequate foundation and must have either a 5/8" thick fireclay or
stainlesssteellining. Theremust beatleast1/2-inch air spacebetweentheflue liner andthechimneywall. (See Figure1.)
3. A chimney inside the house must have at least 2 inches of clearance to the combustible structure. A chimney outside
the house must have at least 1 inch clearance to the combustible structure. Fire stops must be installed at the spaces
where the chimney passes through floors and/or ceilings. (See Figure 2.) Insulation should be at least 2 inches from the
chimney to leave an air space around the chimney. (See Figure 3.)
4. The flue lining of a masonry chimney must be smooth and
havenoleaks. Theinsideofthe chimney flue liner should beno
smaller than 8 inches square or 6 inches round; a smaller chim-
ney flue liner will be too restrictive to the flow of smoke and
gases. A6inchdiameter round liner ispreferredbecauseround
flues draw better than square flues.
5. Since an oversized chimney flue contributes to the accumu-
lation of creosote, the size of the chimney flue liner must be
checked to determine that it is not too large for the heater. For
thisheater,the insidecross-sectionalareaofthechimneyshould
be no more than 85 square inches to assure proper venting.
6. The top of the chimney must be at least 3 feet above the
point where it comes through the roof, and at least 2 feet higher
than any obstruction within a 10 foot radius.(See Figure 4.)
7. If the heater has insufficient draft, the draft may be improved
by extending the height of the chimney.
8. Make certain the chimney is kept clean and it is not blocked.
Checkforlimbsoverhanging the top ofthechimneyperiodically.
MASONRY CHIMNEY REQUIREMENTS
1. When locating the heater , consider safety, convenience, traffic flow, and the fact that the heater will need a
chimney,chimneyconnector,and possibly a floor protector. Make sure none of these materials will be obstructed.
2. The heater should be located away from door ways and central heat outlets to reduce the chances of drafts, blowing
smoke, ashes or sparks out of the heater during refueling or ash removal.
3. The heater should be located in an open area to allow for necessary clearances as specified within this manual.
4. Keepfurniture,drapes,curtains,wood, paper and other combustiblesfarawayfromtheheater.
5. Never install the heater in locations where gasoline, kerosene, charcoal lighter, or any other flammable liquids are
stored
6. Theheatershouldbe locatedwhereasmallsupply of woodmaybekept conveniently closebutnotwithin 36-inches of
theheater.
7. Theheatershould notbelocatedbeneath overhangingshelves,lowceilings orotherstructuresor elevatedsothatless
clearance is created above the heater than is provided when the heater is normally installed in a room with a 7 foot
minimumceiling.
8. Be sure the chimney will be at least 10 feet from flammable gas or liquid storage tanks.
DANGER: DO NOT CONNECT THIS HEATER TO A CHIMNEY FLUE SERVING ANOTHER APPLIANCE. THERE IS A
SERIOUS SAFETY RISK IF TWO APPLIANCES ARE CONNECTED TO THE SAME CHIMNEY FLUE.
CAUTION: Theoperationofexhuastfanssuchasbathroomfans,atticfans,etc.mightstarvetheheaterofcombustible
aircreatinganegativepressureinthe room. Provide adequate ventilation in theroomoccompaningtheheater.
SELECTING A LOCATION FOR YOUR HEATER

USSC 5
FIGURE4-
CHIMNEY HEIGHT REQUIREMENTS
A Chimney must be the required height above the roof
or other obstruction for safety and for proper draft op-
eration. Therequirementis thatthechimneymust beat
least3feethigherthanthehighestpointwhereitpasses
throughtheroofand atleast2feet higher thanthehigh-
est part of the roof or structure that is within 10 feet of
thechimney,measuredhorizontally.
The above chimney heights are the minimum required
bycodesforsafetypurposes to allow sparksexistingin
chimneytimeto cool beforetheylandon theroof. Addi-
tionalheightwillgenerallyincreasedraft,improveheater
operatingcharacteristicsandreducebackdraftingand
puffingproblemsduetowind
A masonry chimney is shown above. However, height
requirements are the same for a metal prefabricated
chimney.
ATLEAST
3 FEET
ATLEAST
3 FEET
10 FEET
Minimum2InchClearance
FromCombustibleMaterial
andInsulation
Noncombustible
Fire-StoppingMaterial
FIGURE3-
MASONRYCHIMNEYREQUIREMENTS
FIGURE2-
MASONRYCHIMNEYREQUIREMENTS
FLOOR
MINMUM 2 INCH CLEARANCE
FORINTERIORCHIMNEY.
MINIMUM1INCHCLEARANCE
FOR EXTERIOR CHIMNEY TO
SHEATHING
FLOOR
(SECONDSTORY)
CHIMNEY
CEILING
CAULKING
Ceiling
NONCOMBUSTIBLE
FIRE-STOPPING
MATERIAL

6USSC
Figure 5 shows how to connect the chimney connector of a heater to a masonry chimney through a combustible wall.
There are five allowable ways that a chimney connector can be connected to a masonry chimney by passing through a
combustiblewall. NFPAStandard211allowsthe following wall pass-through systems.
MASONRY CHIMNEY
CONSTRUCTEDTO
NFPA 211
AIRTIGHT
CLEANOUT
DOOR
FLOOR
PROTECTOR
COMBUSTIBLEWALL
TO
HEATER
CHIMNEY CONNECTOR
CEILING
SEE PARTS A, B, C,
D,AND EOF THIS
FIGUREFOR
OPTIONS.
LINED CHIMNEY FLUE
FIGURE 5 -
CONNECTIONOFCHIMNEYCONNECTORTO A
MASONRY CHIMNEY THROUGH A COMBUSTIBLE
WALL
(FIGURE5CONTINUED ON NEXTPAGE)
CONNECTION OF CHIMNEY TO A MASONRY CHIMNEY THROUGH A COMBUSTIBLE WALL

USSC 7
CHIMNEY FLUE
MINIMUM CHIMNEY CLEARANCE TO
BRICK AND COMBUSTIBLES IS 2 IN.
MINIMUM CLEARANCES 12
IN. OF BRICK ALL AROUND
CHINEY CONNECTOR TO
HEATER
FIRE CLAY LINER
(5/8" MIN. WALL THICKNESS)
MIN. 3-1/2" THICK BRICK
MASONRYWALL
MASONRY CHIMNEY
CONSTRUCTED TO
NFPA 211
MINIMUM 12 IN.
TO COMBUSTIBLES
PART A, FIGURE 5
(FIGURE 5 CONTIUED ON NEXT PAGE)
1. Use a minimum 3-1/2" thick brick masonry wall framed into the combustible wall. A fireclay liner (ASTM C315 or
equivalent) having a 5/8" minimum wall thickness must be used and it must be at least 12" away from any material that
could catch fire. The inside diameter of the fireclay liner shall be sized for the proper snug fit of a 6" diameter chimney
connectorpipe.The fireclaylinershallrun fromtheoutersurface ofthebrickwall to,butnotbeyond, theinnersurfaceof the
chimney flue and shall be firmly cemented in place. See Part A of Figure 5.
2. Useasolidinsulatedlistedfactory-builtchimney length having an inside diameter of 6" and having1"ormoreofsolid
insulation. There must be at least a 9" air space between the outer wall of the chimney length and any combustible
materials. The inner end of the chimney length shall be flush with the inside of the masonry chimney flue shall be sealed
totheflueandtothebrickmasonrypenetrationwithnonwater-solublerefractorycement. Sheet steel supports which are
atleast24 gauge(0.024") inthicknessshall be securelyfastenedtowall surfacesonallsides. Fasteners betweensupports
and the chimney length shall not penetrate the chimney liner. See Part B of Figure 5.
3. Use a 10" diameter ventilated thimble made of at least 24 gauge(0.024") steel having two 1" air channels. The
ventilatedthimblemustbe separated fromcombustiblematerialsby a minimumof6"glass fiber insulation. Theopeningin
the combustible wall shall be covered and the thimble supported with sheet steel supports which are at least 24 gauge
(0.024") in thickness. The sheet steel supports shall be securely fastened to wall surfaces on all sides and shall be sized
tofitandhold thechimneysection. Fastenersusedto securechimneysectionsshallnot penetratechimneyflueliner. See
Part C of Figure 5.
4. Use an 8" inside diameter solid insulated listed factory-built chimney length which has 1" or more of solid insulation.
The minimum length of this chimney section shall be 12" and will serve as a pass-through for the 6" diameter chimney
connector. There must be at least a 12" air space between the outer wall of the chimney section and any combustible
materials. The chimney section shall be concentric with and spaced 1" away from the chimney connector by means of
sheetsteelsupportplateson both ends ofthechimneysection. Theopeningin the combustible wallshallbecoveredand
the chimney section supported on both sides with sheet steel supports which are at least 24 gauge (0.024") in thickness.
The sheet steel supports shall be securely fastened to wall surfaces on all sides and shall be sized to fit and hold the
chimneysection. Fastenersused tosecurechimneysections shallnotpenetrate chimneyflueliner. SeePartC ofFigure5.
5. Alistedfactory-builtwall pass-through systemmaybepurchased and installedaccordingtothe instructions packaged
withittoprovideasafemethodofpassingthechimneyconnectorthrougha combustiblewallforconnectiontoamasonry chimney.
Additional requirements pertaining to Figure 5 and the above wall pass-through systems:
1. Insulation material used as part of wall pass-through system shall be of noncombustible material and shall have a
thermal conductivity of 1.0 Btu • in./ft.² • °F (4.88 kg • cal/hr • m² • °C) or less
2. All clearances and thicknesses are minimums: larger clearances and thickness are acceptable.
3. Achimneythimble,asshown for 3"and4"above(Parts C and DrespectivelyofFigure5) shall be fortypes"3"and"4"
connections to facilitate removal of the chimney connector for cleaning. The chimney thimble shall be of ASTM C315
fireclay with 5/8" minimum wall thickness , or material or equivalent durability. The inside diameter of the thimble shall be
sizedfortheproper snug fitofa6" diameter chimneyconnectorpipe. Thethimbleshall be installedwithout damagetothe
chimneyflue. The thimble shall extend through the chimney wall to, but not beyond, the inner surface of the chimney flue
andshallbepermanentlycementedin place with high temperature cement.
4. Achimneyconnector toamasonrychimney, exceptfor2" above(PartBof Figure5),shallextend throughthewall pass
-through system to the inner face of the chimney flue, but not beyond. It does not have to be fastened in place so long as
it cannot accidently be pulled out of the chimney or shoved into the chimney flue. If fasteners are used to secure the
chimney connector to a masonry chimney, the fasteners shall not penetrate the chimney flue liner.
5. Any material used to close up any opening for the connector shall be noncombustible.

8USSC
PART E - (Figure 5)
In addition to the methods shown by A, B, C, and D of Figure 5, a listed factory-built wall pass-through system may
be purchased and installed according to the instructions packaged with it to provide a safe method of passing
chimney connector through a combustible wall for a connection to a masonry chimney.
If the chimney connector does not have to pass through a combustible wall to get to a masonry chimney, simply connect
the chimney connector directly to the masonry chimney's chimney thimble as described and shown by parts C and D of
Figure5. Remember,thechimneyconnectorshouldextendintothechimneythimbletotheinnerfaceofthechimneyflue
butnotbeyond; if the chimnneyconnectorisextended throughthechimneythimble into thechimneyflue,resistance tothe
flow of smoke and gases up the chimney will occur; that flow resistance will have an adverse affect on the operation and
performance of the heater and venting system.
MINIMUM CHIMNEY CLEARANCES FROM MASONRY TO
SHEETSTEELSUPPORTSANDCOMBUSTIBLES2IN.
CHIMNEYLENGHT
FLUSH WITH INSIDE
OFFLUE
NONSOLUBLE
REFACTORY
CEMENT
MASONRY CHIMNEY CONSTRUCTED
TONFPA211
CHIMNEY CONNECTOR
TOHEATER
MINIMUM CLEARANCE
9IN. ALL AROUND
SHEETSTEELSUPPORTS
(24GAUGEMIN. THICKNESS)
CHIMNEYFLUE
SOLIDINSULATED,LISTED
FACTORY-BUILTCHIMNEYLENGHT
USECHIMNEYMFRS. PARTS TO
ATTACHCONNECTORSECURELY
AIRSPACE
PART B
FIGURE 5 -
(FIGURE 5 CONTIN-
UED)
AIRSPACE
9 IN. MINIMUM
FACTORY-BUILT
CHIMNEYLENGHT
SHEETSTEELSUPPORTS
CHIMNEYSECTION
CHIMNEY
CONNECTOR
AIRSPACE
2IN.
TWOVENTILATEDAIR
CHANNELSEACH 1 INCH.
CONSTRUCED OF
SHEETSTEEL.
PART C
FIGURE 5
PART D
FIGURE 5
MINIMUM CLEARANCE
2IN. ALL AROUND
CHIMNEYTHIMBLE 1IN.AIRSPACETO
CHIMNEYLENGHT
MASONRY CHIMNEY CONSTRUCTED
TONFPA211
SHEETSTEELSUPPORTS
(24GAUGEMIN. THICKNESS)
CHIMNEY CONNECTOR
TOHEATER
CHIMNEYFLUE
SOLIDINSULATED,LISTED
FACTORY-BUILTCHIMNEY
LENGHT (12 IN. LONG MIN.)
MINIMUM CHIMNEY CLEARANCES FROM MASONRY TO
SHEETSTEELSUPPORTSANDCOMBUSTIBLES2IN.
MASONRY CHIMNEY CONSTRUCTED
TONFPA211
SHEETSTEELSUPPORTS
(24GAUGEMIN. THICKNESS)
CHIMNEY CONNECTOR
TOHEATER
MINIMUM CHIMNEY CLEARANCES FROM MASONRY TO
SHEETSTEELSUPPORTSANDCOMBUSTIBLES2IN.
MINIMUM6IN. GLASS
FIBERINSULATIONALLAROUND
24GAUGE
VENTILATEDTHIMBLEWITH
TWO 1 INCH AIR CHANNELS
CHIMNEYTHIMBLE
CHIMNEYFLUE
CONNECTIONOFCHIMNEY CONNECTORTO AMASONRY CHIMNEYWHENCHINEY CONNECTOR
DOESNOTPASS THROUGHA COMBUSTIBLEWALL

USSC 9
METAL PREFABRICATED CHIMNEY REQUIREMENTS
Anymetalprefabricated chimneythatthisheater isconnectedtomust beaListed HighTemperatureType103-HT Factory-
Built Residential Type and Building Heating Appliance Chimney. Its interior size should be no smaller than 6 inches in
diameterornolargerthan 8 inches in diameter. Anundersizedchimney(lessthan6 inches interior diameter) willresultin
poordraftandinsufficientoperation where as anoversizedchimney(largerthan 8 inches diameter)willresultinpoor draft
andmorecreosoteaccumulation.
Whenametalprefabricatedchimneyis used, the manufacturer'sinstallationinstructionsmustbefollowedprecisely. You
must also purchase (from the same manufacturer) and install the ceiling support package or wall pass-through and "T"
section package, firestops (when needed), insulation shield, roof flashing, storm collar, and chimney cap (with a spark
arrester if desired or where required by code). NOTE: IF THE HEATER IS BEING INSTALLED IN A MOBILE HOME, A
SPARKARRESTERISREQUIRED BYCODETOBE INSTALLED WITHTHECHIMNEYCAP.
The top of the chimney should be at least three feet above the point where it comes through the roof and at least to feet
higher than any part of the roof or house within a ten foot radius. See Figure4.
A straight up chimney is best because it will draw better.
When ordering a metal prefabricated chimney, specify the type home (residential or mobile) in which the chimney will be
installed, and the method of installation which is being planned.
METAL PREFABRICATED CHIMNEY INSTALLATION
There are basically two methods of metal prefabricated chimney installation. One method is to install the chimney inside
the residence through the ceiling and the roof. The other method is to install an exterior chimney that runs up the outside
of the residence.
Figure 6 shows a metal prefabricated chimney installed inside the residence through the ceiling and roof.
Figure 7 shows an exteriorly installed metal prefabricated chimney that runs up the outside of the residence.
ThecomponentsillustratedbyFigures6 and 7 may not lookexactlylikethesystemyoupurchased, but they demonstrate
the basic components for a proper and safe installation.
REMEMBER: Followthechimney manufacturer's installationinstructionsandmaintain themanufacturer'sspecifiedclear-
ancedistance.
THECHIMNEY CONNECTORSHALL NOTPASSTHROUGHANATTIC,ROOFSPACE,CLOSETFLOORCEILING,OR
SIMILAR CONCEALED SPACE. WHERE PASSAGE THROUGH A WALL OR PARTITION OF COMBUSTIBLE CON-
STRUCTIONISDESIRED, THEINSTALLATIONMUST CONFORMWITH CAN/CSA-B365.

10 USSC
COMBUSTIBLE
CEILING
JOIST
SPECIFIED
CLEARANCE
INSULATION
SHEILD
LISTED CHIMNEY
TO HEATER
CEILING
SUPPORT
CHIMNEY
CONNECTOR
ROOF
FLASHING
STORM COLLAR
CHIMNEY CAP (WITH SPARK
ARRESTER IF DESIRED OR
WHERE REQUIRED BY LAW.)
MAINTAIN 2 INCH
CLEARANCE
LISTED CHIMNEY
CEILING
CEILING SUPPORT
CHIMNEY CONNECTOR
TO
HEATER WALL
FLOOR PROTECTOR
FIGURE 5 -
METALPREFABRICATEDCHIMNEY INSTALLEDINSIDE THE RESIDENCETHROUGH THE
CEILINGANDTHE ROOF
INSTALL AN INSULATION SHEILD
TO MAINTAIN THE SPECIFIED
CLEARANCETOINSULATIO. INSU-
LATION IN THIS AIR SPACE WILL
CAUSE A HEAT BUILDUP WHICH
MAYIGNITETHECEILINGJOIST.
DETAIL OF
CONNECTION

USSC 11
SECTION LISTED
CHIMNEY PIPE
TO HEATER
TRIM COLLAR
ON INSIDE WALL
CHIMNEY
CONNECTOR
LISTED CHIMNEY
INSULATED "T"
WALL SUPPORT
WALLSPACER
ON OUTSIDE WALL
2" CLEARANCE
(BETWEEN WALL
AND CHIMNEY)
COMBUSTIBLE OUTSIDE
WALL
CHIMNEY CAP
(WITH SPARK ARRESTER
IF DESIRED OR WHERE
REQUIRED BY LAW.)
ROOF FLASHING
STORM COLLAR
MAINTAIN 2 INCH CLEAR-
ANCE THROUGH EAVE
CEILING
CHIMNEY
CONNECTOR
TO
HEATER
WALL
INSULATED "T"
DETAIL OF
CONNECTION
FIGURE 7 -
EXTERIORLYINSTALLEDMETAL PREFABRICATEDCHIMNEYTHAT RUNSUP THE OUTSIDEOF THE
RESIDENCE.
FLOOR
PROTECTOR

12 USSC
HEATER INSTALLATION
CAUTION: FORYOURSAFETY,THEINSTALLATION OF THIS HEATERMUSTCOMPLYWITHLOCAL CODES AND
REGULATIONS. CONTACT LOCAL BUILDING OR FIRE OFFICIALS ABOUT INSPECTION TO ASSURE PROPER
COMPLIANCEWITHLOCALCODESANDREGULATIONS.
MINIMUMCLEARANCESTO COMBUSTIBLEWALL AND CEILINGS
CAUTION:MOST WALLSANDCEILINGSCONTAIN WOOD EVENTHOUGHTHEYAREMADEOF SHEETROCK OR
PLASTERONTHEOUTSIDE. THESEWALLSANDCEILINGSCANCATCH FIREFROMTHEHOTWATERHEATEROR
CHIMNEYCONNECTORIFHEATERANDCHIMNEYCONNECTOR ARENOTPROPERLYINSTALLED.
Minimum clearances to unprotected combustible walls and ceilings as noted by Figure 8 must be maintained. Drapes,
curtains, furniture and other combustible materials should be kept much further away from the heater chimney connector
to avoid a fire.
FIGURE 8 -
MINIMUMCLEARANCESTO COMBUSTIBLE MATERIALS(IN INCHES)
fyouchooseto,youmayinstalltheheaterandchimneyconnectorclosertocombustiblesurfacesthanindicatedbyFigures
2through4IFa clearance reductionsystemisalso installed toprotectcombustibleceilingsand walls neartheheaterand
chimneyconnector. However,therearelimitstohowclosetheheaterandchimneyconnectorcanbeinstalledtocombustible
surfaces protected by a clearance reduction system.
A correctly installed clearance reduction system protects the combustible surfaces well beyond the sides and above the
top of the heater and beyond the sides and top of the chimney connector pipe.
Twocommontypesofclearancereductionsystemsusesheetmetalwithaminimumthicknessof28gauge(galvanizedsteel,
aluminum,copper)ora3-1/2inch(4inchnominal)thickmasonrywall. Eitherofthesematerialsmustbespacedout1inch
fromthecombustiblesurfaces. Withsheetmetal,non-combustiblespacersareusedtomaintainthe1inchairspace. With
amasonrywall,metalwalltiesandfurringstrips,ifneededareusedtoanchorthebricktothewall. Toavoidexcessiveheat
transmission,thespacersorwalltiesshouldnotbeplaceddirectlybehindtheheaterorchimneyconnector. The1inchair
spaceprovidesfreeaircirculation. Itisessentialthattherebeopeningsatthetopandbottomoftheseclearancereducers
so cool air can enter at the bottom and hot air exit at the top. It is the "chimney effect" whereby when the air in the space
is heated, it rises exiting from the top and being replaced by cooler air at the bottom, that makes these shields effective.
CEILING CEILING
BACKWALL
BACKWALL
BACKWALL
SIDEWALL
WALL
32
21
32
17
21
32
21
17
CORNER
INSTALLATION
32

USSC 13
FIGURE 9 -
PLAN VIEWS SHOWING FLOOR PROTECTOR'S MINIMUM SIZE (DIMENSIONS IN INCHES)
Masonry,orothernon-combustibleproducts,attacheddirectlytoacombustiblesurfacewithoutanairspaceofferverylittle
protectionand cannotbeconsideredaclearancereducerunlessspecifiedmaterialshavebeentestedandlistedfor direct
attachmenttoacombustiblesurface. Thesameappliestothinveneerbrickandstonecoverings. Thesematerialsprovide
adequate protection only when mounted on sheet metal with a 1 inch spacing to the wall.
A variety or prefabricated clearance reduction systems which have been tested and listed are available through heater
dealers. Alwayslookforasafetylistinglabelontheproduct when selecting a clearance reduction system and make sure
it is designed for solid fuel appliances. The manufactures of these systems provide specific installation instructions that
must be followed exactly for a safe installation.
Shouldyouchoosetomakeyourownclearancereductionsystem,contactyourlocalfiredepartment,firemarshalorbuilding
code inspector for specific requirements regarding home constructed clearance reduction systems and safe installation
clearances to protect combustible materials.
CAUTION: READ ALL INSTRUCTIONS BEFORE INSTALLING THE HEATER.
TOINSTALL THEHEATER:
1. Make ready a suitable chimney. The chimney must complywith the requirements for Type 103-HT chimneys in the
standard for chimneys, Factory Built, Residential Type and Building Appliances, UL 103.
2. Gather the necessary materials, tools, and supplies which will be needed to install the heater.
CAUTION: DO NOT USE MORE THAN ONE 90 DEGREE BEND (ELBOW) IN THE CHIMNEY CONNECTOR
INSTALLATION. MORE THAN ONE 90 DEGREE BEND (ELBOW) IN THE CHIMNEY CONNECTOR COULD NEGA-
TIVELYAFFECT CHIMNEYDRAFT.
3. Iftheflooronwhichtheheateristobeinstallediswoodoranyothercombustiblematerial,placeafloorprotector(described
earlier)onthefloorwhere the heater willbeinstalled.
CAUTION: THEFLOORPROTECTOR MUSTNOTBE PLACEDONCARPET. REMOVE CARPETFROM BENEATH
THEFLOORPROTECTOR.
4. Place the heater on the floor protector as shown in Figure 9.
5. Assemble the chimney connector stove pipe from the heater's flue collar to the chimney to determine if the chimney
connectorpipewillcorrectlyextendfromtheheater'sfluecollartothechimney. Anyhorizontalsectionofchimneyconnector
stove pipe must slope upward at least 1/4-inch rise to the horizontal foot to help maintain a sufficient draft. Always install
thechimneyconnectorpipewiththecrimpedendtowardtheheatertopreventcreosoteorsootfromleakingoutofthechimney
connectorpipejoints. MAKESURECLEARANCESTOCOMBUSTIBLESAREMAITAINEDASSPECIFIEDBYFIGURE
8 IF A CLEARANCE REDUCTION SYSTEM IS NOT INSTALLED.
22
8888
16
8
16
8
FLOOR PROTECTOR
FLOOR PROTECTOR
WHENCHIMNEYCONNECTOR EXITS
THROUGHTHE CEILING WHENCHIMNEYCONNECTOR EXITS THROUGHTHEWALL

14 USSC
6. Place the crimped end of the first chimney pipe or elbow into the heater's flue collar and mark it through each of the
holes in the heater's flue collar.
7. Remove the pipe or elbow from the flue collar and drill 1/8 - inch diameter holes at the points marked.
8. Applythefurnaceto theinsidesurfaceof the heater'sfluecollar,reinstall the firstpipeorelbow and fasteninplacewith
No. 8 sheet metal screws. Apply additional furnace cement to the outside of the chimney connector flue collar joint if an
airtight seal was achieved when the pipe or elbow was installed. Wipe all excess furnace cement from the joint with a rag
orpapertowelbeforethecement dries.
9. Assemble the remaining chimney connector pipes by apply furnace cement to the joints, drilling 1/8-inch diameter
holes for and attaching each joint with three(3) No. 8 sheet metal screws. Wipe all excess furnace cement from the joints
with a rag or a paper towel before the cement dries.
10. Depending on the type chimney installed, connect the chimney connector to the chimney as shown in Figure 5 or as
describedbythechimney'smanufacturer. Remember, we highly recommend useofUL103-HTchimney.
11. If the chimney to which the heater is connected is a metal prefabricated chimney that exits the home at a point 7 feet
or less above ground level and runs up the outside of the residence, it will be necessary to construct a chimney shield to
prevent someone from coming in contact with the outer surface of the hot chimney while the heater is in operation. The
shield should be constructed from wire mesh or expanded metal (22 gauge minimum) to allow air circulation around the
chimney. Theopeningsintheshield shouldnotbelargeenoughtoallowa 1/2-inchdiameterrodtopassthrough. Theshield
should have sufficient rigidity to provide the required protection and be permanently installed as shown in Figure 10.
DANGER: IF ANY CLEARANCE TO UNPROTECTED COMBUSTIBLE WALL OR CEILING IS LESS THAN THOSE
SPECIFIED BY FIGURE 8 AFTER HEATER INSTALLATION IS COMPLETED, A CLEARANCE REDUCTION SYSTEM
MUST BE INSTALLED BEFORE THE FIRST FIRE IS BUILT IN THE HEATER; OTHERWISE, THE UNPROTECTED
WALLOR CEILINGCOULD CATCHFIRE. REMEMBER, THEREARE ALSOLIMITS ASTO HOWCLOSE THEHEATER
CAN BE INSTALLED TO A COMBUSTIBLE SURFACE PROTECTED BY A CLEARANCE REDUCTION SYSTEM. RE-
READ"MINIMUMCLEARANCESTOCOMBUSTIBLEWALLANDCEILINGS"PRESENTEDEARLIERINTHISMANUAL.
7 FEET
(SHIELD NOT REQUIRED
BEYOND 7 FEET ABOVE
GROUND LEVEL.)
CHIMNEY
SHIELD
GROUND LEVEL
FIGURE 10 -
INSTALLATIONOFCHIMNEY SHIELD

USSC 15
OPERATING INSTRUCTIONS
Burning Coal in your 4027/ASA7
Your Wondercoal is capable of burning both bituminous and Anthracite coal. Anthracite is the best coal fuel because its long even burn time, high
heat output, and cleanliness make it a good choice for the home. However, keep in mind it is a much more difficult fuel to use and requires more care
and patience.
SIZE OF COAL: Most sizes of bituminous coal will work in your heater; for best results we recommend large nut coal to small eggcoal(1-3/4"diameter
to 4" diameter). When burning anthracite, use egg or broken with sizes between 2-5/16" and 4-3/8". Note that it is important to the life of your stove
to buy coal which has been sized and cleaned. Cleaning insures removal of rocks and other materials.
STOVE OPERATION: All coal fires should be started with wood which will allow the fire to get hot enough to ignited the coal. The Best ignition fires
utilize dry pine or other resinous soft woods as kindling, with hard wood (oak, hickory, ash) added to increase the heat prior to adding the coal.
BITUMINOUS: Once your kindling and wood fire has produced a bed of well established coals start adding coal in layers allowing each to ignite before
adding more. Bituminous has a high volatile content and, as a result, should be fired with the "conical method" - with the highest portion of your firebed
in the center of the firebox. The first flames will be long and generally orange or yellow and produce quite a bit of smoke. As the gases burn off the
flames become shorter, change color and produce less smoke.
Once the fire is WELL ESTABLISHED add coal to the center of the firebox forming the cone. Burning in this fashion allows heat to drive off the volatile
gases,andturbulencecreatedincreasestheburnefficiency. Youwillhavetoexperimentwithyourparticularsetupasnotwochimney'sandinstallations
are going to be the same. Just remember to allow enough secondary air to enter and keep your stove pipe damper open so that volatiles are properly
burned. Before refueling, take the time to break up the cone a little with a poker, especially if it has caked over or formed a crust. But, be careful
not to mix the coal as this increases the chances of forming clinkers. When shaking the grate be gentle. Just a few short movements - front to rear
- are beter than a lot of agitation. The objective is to remove a small amount of the ashes without disturbing the fire. Stop when you see a glow in
the ashes or the first red coals fall into the ash pan. Excessive shaking wastes fuel and can expose the grate to very high temperatures which can
cause warpage or burnout.
For overnight operation (long duration burn time) shake the fire and add coal, retaining your center cone. Once the volatiles are burned off close
the feed door and adjust your stove pipe damper. Then adjust your thermostat to the desired heat level.
You will have more MAINTENANCE with bituminous than with anthracite coal as more soot will collect on heating surfaces and in pipes, requiring more
frequent cleaning.
ANTHRACITE: Before starting the fire open the stove pipe damper, turn the automatic thermostat to high, open the ash pit door and feed door, place
newspaperandfinelysplitkindlingonthegrate,lightthepaper,addlargerhardwoodafterthekindlingisburningbrightly. CAUTION:Neverusegasoline,
lantern fuel, kerosene, charcoal lighter fluid, or other flammable liquids to start or freshen up a fire in this heater. Place the larger pieces
of wood on the fire so that are slightly separated and form a level for the addition of coal. It will take 10 to 20 minutes before this wood is thoroughly
ignited. Adding coal too soon will cut the air supply and smother the fire.
Add a thin layer of coal (perferably smaller chunks) to the wood fire, being careful not to disturb it too much or cut off the draft. Then, add a second
heavier layer after the coal is ignited and burning well. If necessary, add a third layer to bring the coal up to the top of the front brick (not above!).
Be sure you have closed your ash door.
Before adding further fuel, be sure you leave a red spot of glowing coals in the center of the firebox to insure that you have not smothered the fire
and to help ignite the gases given off by the new charge. A deep charge will give a more heat and a longer fire but it may take one to two hours before
the whole bed is fully ignited.
When the fire is well established and the room is becoming warm, partially close the dampers. You will have to experiment withyour particular setting
of all dampers and controls as your chimney provides the draft necessary to not only exhaust the smoke, but to pull combustion air into the heater
as well - and no two chimney's perform the same. Under ideal draft conditions you should be able to turn the secondary air supply on the feed door
to a near closed position - but leave the ash pit damper at least partially open to prevent the fire from going out. Adjust the stove pipe damper to reduce
the draft on the fire. With anthracite you will see short blue flames above the coal, except when the fire is started or a new charge is added. If, however,
there is no flame then the fire needs more air from the bottom (unless it is near the end of its burn cycle and needs to be recharged).
Only when the coal is burned down to half its original depth it is time to add fresh coal. When doing so, open your stove pipe damper and turn your
thermostat damper to high, which will allow the fire to burn off any accumulated gases. Open the feed door, and with a small rake, hoe or hooked
poker pull the glowing coals to the front of the firebox. Try not to disturb the fire too much. Next, add a fresh charge to the back being careful not
to seal off the top. Close the feed door but leave the spin damper (Fig. 9) open for a few minutes until the until the volatile gases have burned off.
It is not necessary to shake down the ashes each time you refuel your Wondercoal. Experience will be your best teacher.
BANKING THE FIRE: For extended operation, such as overnight, you will need to bank the fire. To do so heap coal up along the sides and back
of the firebox so that the fire gradually burns it over a longer period of time. You will also reduce the intensity of the fire without letting it go out. Follow
the same procedure as for refueling. If possible, avoid shaking, as a heavier layer of ash will help reduce the intensity of the fire during this time. After
loading let the fire establish itself for about 30 minutes. Then close your damper and automatic control to the point where the house does not become
too cold. It is important that you begin banking early enough before retiring or leaving that you can make necessary adjustments after the fire is well
established.
To revive a coal fire that is almost out, you should (1) open the ash door and stove pipe damper and close the spin damper (Fig. 9) on the door to
get a good enough draft through the grate. (2) Place a thin layer of dry coals over the entire top of the fire. DO NOT POKE OR SHAKE THE FIRE
AT THIS TIME! (3) After the fresh coal has become well ignited shake the grate (just a little) and you will be ready to refuel.
DO NOT burn coke, charcoal, high volatile bituminous coal, sub bituminous, lignite or cannel coal (sometimes called channel or candle coal). NEVER
burn wax or chemically impregnated sawdust logs - their intended use is for fireplaces only.

16 USSC
CAUTION! ASHESSHOULDNEVER BEALLOWED TO ACCUMULATEABOVE THETOPOF THEASH PAN. ASHES
IN CONTACT WITH THE BOTTOM OF THE GRATES ACT AS AN INSULATOR, INTENSIFYING THE HEAT ON THE
GRATESAND COULDCAUSETHEIR WARPAGE. WITHANEXCESSIVEASHBUILDUP,PRIMARYCOMBUSTIONAIR
IS RESTRICTED, THUS THE UNIT’S OUTPUT COULD BE REDUCED.
GRATESDAMAGEDINTHISWAYAREEASILYRECOGNIZEDBYTHEEXTREMEDAMAGECAUSEDTO THEGRATES.
PLEASE REFER TO YOUR WARRANTY TO SEE UNITED STATES STOVES LIMIT OF LIABILITY IN CASES OF
ABUSEORNEGLECT.
Bituminouscoalproducesconsiderablymore ashes than wood, sotheintervalsbetweenemptyingare much shorter. For
equal heat output, coal will produce seven to ten times more ash than wood.
Ashes should never be allowed to accumulate in the ash pit so that they in any way impede the flow of combustion air
to the fire. Excess ash accumulation can cause the fire to go out and also can cause severe damage to the grates
because of the absence of a cooling flow of air beneath them.
Ashes should be placed in a metal container with a tight fitting lid. The closed container of ashes should be placed on
anon-combustibleflooror on the ground,wellawayfrom all combustible materials,pendingfinaldisposal. If the ashes
are disposed of by burial in soil or otherwise locally dispersed, they should be retained in the closed container until all
cindershavethoroughlycooledoutside the dwelling.
•
•
Ashes
OPERATING INSTRUCTIONS continued...
Coal should never be added unless there is a reasonable hot fire. The coal bed should be bright and vigorous.
If the fire is burning hot and there is a deep bed of coals, full loads of coal can be added at any time. However, if there
is not a deep bed of coals, it is best to add small amounts of coal at first.
Every effort should be made not to let a coal fire burn too long so that the fire has started to die. This will cause the
reloading process to be much longer, and there is a good possibility of losing the fire.
Do not shake or stir with a low fire.
Open the draft control wide or open the ash door fully open until the fire is reasonably hot.
Start adding small amounts of coal. When the new coal is thoroughly ignited or there is a substantial bed of hot coals,
the stove may be shaken thoroughly. Be sure to shake down all ashes (but do not overshake).
Aftershaking,keepthebottomdraftcontrolopenuntilyouaresurethefireiscontinuingtoburnhot,then turn the draft
control down to the proper operating level. IF THE ASH DOOR HAS BEEN OPENED, BE SURE TO SHUT IT (SERI-
OUS DAMAGE CAN RESULT IF THE STOVE IS OPERATED FOR EXTENDED PERIODS WITH THE ASH DOOR
OPEN).
Count the exact number of turns from full shut to the normal operating positions so that you can adjust the stove to the
exact level of heat output and length of burn you desire.
Shaking should be done only when there is a hot fire.
Thefrequencyofshakingwilldependonthetypeofstove and the degree of burning. Shaking should be done at least
once a day, and preferably twice a day.
Best results from shaking with the grates will occur if short “choppy” strokes are used rather than long, even strokes.
Theamountofshakingis critical. Too little ortoomuch,eithercanresult in the extinguishingofafiredueto blocked air
flow. The proper amount normally occurs when red coals first start to drop through onto the bed of ashes.
The heat output of the coal is controlled by the primary draft control on the bottom door. Experience will dictate the
propersettingsfor heatrequirements.
Coal responds very slowly to changes in the draft settings. Because of this slow response time, over-correcting is a
commonproblem. Whenchangesinheat output are needed, makeonlysmallchangesinthe draft setting and waitfor
the temperature to stabilize.
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Loading
Increasing Heat From a Low Fire
Shaking
Draft Controls

USSC 17
OPERATING INSTRUCTIONS continued...
Beforeopeningtheloadingdoor, open the pipe damperandtheashdoorfirst.
Wheneveraloading door isopened,italways shouldbecrackedslightly to allowoxygentoenter andburnanycombus-
tiongasesthatare present beforefullyopening. Failuretodo this couldresultinsuddenignition of theunburnedgases
whenthedooris opened.
A stove never should be filled with excessive coal so that the flue gas exit is blocked or impeded in any way. Burning
coalgeneratescarbon monoxide. If thefluegasexit isblocked,thecarbon monoxide canbeforcedout ofthestoveinto
the room, with possible fatal consequences.
WITH THE EXCEPTION OF THE START-UP PERIOD, THE ASH PIT DOOR SHOULD NEVER BE LEFT OPEN.
ALSO NOTE THAT A STOVE SHOULD NEVER BE LEFT UNATTENDED WITH THE ASH PIT DOOR OPEN.
Serious damage to the stove can occur from overheating.
Coal stoves should not be installed in any chimney that has had a history of back-draft or flow reversal. These
conditions can cause improper draft resulting in carbon monoxide entering the house rather than being drawn up the
chimney. REMEMBER!COALGASESARETOXIC!
Sulfurdioxide,sulfurtrioxide and other ionsreleasedfromcoal burning may corrodestainlessand masonrychimneys,
and even terra cotta chimney liners and brick in nearby buildings. Coal with high sulfur content will destroy chimneys
especially fast if soot sits in the flue for extended lengths of time. It is important to clean chimneys regularly.
•
•
•
•
•
•
Safety
PREVENTATIVE MAINTENANCE INSTRUCTIONS
CAUTION! BEFORE CLEANING CHIMNEY AND SMOKE PIPE BE SURE FIRE IS OUT AND INSIDE OF STOVE IS
COOL.
Soot - Formation and Need for Removal - When coal is burned, the products of combustion combinr with moisture to
form a soot residue, which accumulates on the flue lining. When ignited, this soot makes an extremely hot fire. When
burningcoal,thechimneyconnectorand chimney should be inspected atleastonceeverytwomonthsduring the heating
season to determine if a soot buildup has occured.
To clean the chimney, obtain a stiff brush with an extendable handle and insert the brush into the chimney from the top.
Continuethebrushingandsweepingdownward until the entire lengthofthechimneyiscleaned.
After cleaning the chimney the debris will be at the bottom of the chimney at the clean-out opening. Open the clean-out
doorandsweepthedebrisoutintoametal container.
The smoke pipe from the stove to the chimney can be cleaned with a steel brush.
TO REDUSE RISK OF EXCESSIVE TEMPERATURES AND DAMAGE TO THE UNIT, USE ONLY NUT SIZE (OR
LARGER)BITUMINOUSOR ANTHRICITECOAL
STORECOALIN ADRY, WELLVENTILATEDAREA.

18 USSC
1
2
3
4567
89
10
12
11
13
16
19 14
15 18
20
17
1516
26 25 24
20212223 4027 &
ASA7
Repair Parts

USSC 19
MODEL 4027 & ASA7 - PARTS LIST
KEY PARTNO. DESCRITION QTY.
1 40422 CastIronLegs 4
• 83507 3/8-16x1-1/4 Bolt 4
2 25096 Flue Collar 1
• 83431 Weld Tab 3
• 83045A Washer 3/8 i.d._7/8 o.d. 3
• 83432 5/16-18x1-1/2HexBolt 3
3 25080B DoorLatch 2
• 83508 5/16- 18 x 3/4 Bolt 2
• 83338 5/16-18 LockNut 2
4 69338B ShakerHandleAssembly 12
* 40423 Complete ShakerGrateAssembly 1
5 83109 1/4-20Square Nut 2
6 25079 Retainer,Cog 1
7 83227 1/4-20 x 1 Bolt 2
8 40408 LeftShaker Grate 1
9 40409 RightShakerGrate 1
10 40407 Shaker Frame 1
11 40415 Cog,Grate 2
12 89066 Fire Brick (4-1/2 x 9 x 1-1/4 THK.) 12
13 69349 AshPanAssembly 1
14 25095 Ash Door - Painted 1
15 40437 DoorHandle 2
16 83506 3/8 x 1-1/4 Roll Pin 2
17 40379 DraftCap 1
18 83503 3/8-16 x 2-1/2 Carriage Bolt 1
19 83274 3/8-16LockNut 1
20 83443 DoorPin 4
21 25094 Feed Door - Painted 1
22 891053 DoorGlass 1
• 891067 Door Glass w/ Ashley Logo (For Model ASA7) 1
• 88087 GlassGasket 2.5ft
• 88066 5/8”RopeGasket 3.375ft
23 25178B Top Glass Retainer 1
24 25179B BottomGlassRetainer 1
25 25180B Side Glass Retainer 2
• 83202 10-24 x 3/8 Machine Screw 8
26 88057 1/2”RopeGasket 4.5ft
• 89574 SpringHandle 3
• - Not Shown
Feed Door Glass Replacement
Thefuelfeeddoorisequipped with heat resistant ceramic glassthatwillwithstandtemperatureswell beyond the heater's
operatingrange. Reasonablecare,however, must betakentoprevent damaging theglass. Striking,slamming,or closing
the door against the wood fuel could cause cracking or breakage of the glass. Cracked glass can break suddenly when
heated. Do not use the heater with cracked or broken glass. Clean glass only when the heater is cooled off. Do not use
abrasive cleaners, use Windex, soap and water, etc. If the glass must ever be replaced, replace it only with glass
provided by the heater's manufacturer.
Toreplacetheglass:
1. Obtain correct glass. If the glass gasketis damaged, it must be replaced as well.
2. Remove screws which secure the glass retainers to rear of fuel feed door. Then carefully remove the glass retainers,
old glass, and glass gasket.
3. Postiongasketsnuglyaroundentire perimeter of new glass.
4. Place the new gasketed glass against rear of fuel feed door and secure in place by reinstalling

20 USSC
THIS MANUAL WILL HELP YOU OBTAIN EFFICIENT, DEPEND-
ABLE SERVICE FROM YOUR HOTBLAST FURNACE, AND EN-
ABLE YOU TO ORDER REPAIR PARTS CORRECTLY.
KEEP THIS MANUAL IN A SAFE PLACE FOR FUTURE REFER-
ENCE.
WHEN WRITING, ALWAYS GIVE THE FULL MODEL NUMBER
WHICH IS ON THE NAMEPLATE ATTACHED TO THE HEATER.
WHEN ORDERING REPAIR PARTS, ALWAYS GIVE THE
FOLLOWING INFORMATION AS SHOWN IN THIS LIST:
1. THE PART NUMBER
2. THE PART DESCRIPTION
3. THE MODEL NUMBER: 4027 ASA7
4. THE SERIAL NUMBER:____________________
HOW TO ORDER REPAIR PARTS
UNITED STATES STOVE COMPANY
227 INDUSTRIAL PARK ROAD
P.O.BOX 151
SOUTH PITTSBURG, TN 37380
[phone]
WWW.USSTOVE.COM
CRUS