USSC Wondercoal 2941 User manual

OWNERS MANUAL
Model 2941
WONDERWOOD
THERMOSTAT CONTROLLED WOOD BURNING CIRCULATOR
SAFETY NOTICE:
If this heater is not properly installed, a house fire may result.
For your safety, follow the installation directions.
Contact local building or fire officials about restrictions and
inspection requirements in your area.
CAUTION:
Read all instructions carefully before starting the installation
or operation of this heater.
Improper installation may void your warranty.
*ASSEMBLY
*INSTALLATION
*OPERATION
*REPAIR PARTS
C
O
M
P
A
N
Y
U
N
I
T
E
D
S
T
A
T
E
S
S
T
O
V
E
C
S
S
U
85947-J
HOW TO ORDER REPAIR PARTS
Thismanualwillhelpyoutoobtainefficient,dependableservice
from the heater, and enable you to order repair parts correctly.
Keep this manual in a safe place for future reference.
Whenwriting,alwaysgivethefullmodelnumberwhichisonthe
nameplate attached to the inside of the cabinet door of the
heater.
WONDERWOOD
When ordering repair parts or options, always
givethefollowinginformationasshowninthislist:
1. The PART NUMBER
2. The PART DESCRIPTION
3. The MODEL NUMBER: 2941
4. The SERIAL NUMBER:________________
Before installing your heater, fill in the serial number of your
heater in the space provided above.
United States Stove Company
227 Industrial Park Rd.
P.O.Box 151
South Pittsburg, TN 37380
[phone]
www.USSTOVE.com
United States Stove Company
227 Industrial Park Rd.
P.O.Box 151
South Pittsburg, TN 37380
[phone]
www.USSTOVE.com
DO NOT USE THIS HEATER IN A MOBILE HOME OR TRAILER
Tested to UL 1482 & CAN/ULC-S627

219
F36 BLOWER KIT
An Optional Blower kit is available for the 2941 Wonderwood
automatic wood burning circulator heater. If this kit is not available
where you have purchased this Wonderwood heater, you can
purchase the F36 Blower Kit directly from the factory. To order
contact the United States Stove Company at the address and
telephone number given on the back page.
TOOLS AND MATERIAL NEEDED
TOOLS
Pencil
6 Foot Folding rule or tape
Tin Snips
Drill, hand or electric
Drill bit, 1/8" dia.
(for sheet metal screws)
Gloves
Screwdriver (blade-type)
5/16" Nut Driver or
5/16" Socket w/Ratchet
MATERIALS
Chimney Connection- 6" Dia. Black
Steel (24 Ga. minimum): Straight or
corrugated elbow (as required)*
1/2" Sheet Metal Screws
6" Inside Diameter Underwriters
Laboratories (UL) listed Residential
Type and Building Heating Appliance
Chimney, Type "HT", or 6" existing
Masonry Chimney with flue liner.
Floor Protector Material: 3' x 4'-6" as
specified on page 4.
Furnace Cement (Manufacturer
recommends: Rutland Code 78 or
Equivalent)
* Avoid adjustable elbows, they leak!
CIRCULATOR DIMENSIONS
Fig. 1
32 1/4
12 1/2
33 1/2
4 1/8
4 1/4
19 1/4
CENTER LINE OF 6"
CHIMNEY CONNECTOR
24
TOP OF FLOOR PROTECTOR
CENTER LINE
OF 6"
CHIMNEY
CONNECTOR
WONDERWOOD
RULESFORSAFEINSTALLATIONANDOPERATION
Read these rules and the instructions carefully.
SAFETYNOTICE:Ifthisheaterisnotproperlyinstalled,ahousefiremayresult. For
your safety, follow the installation directions. Contact local building or fire officials
about restrictions and installation inspection requirements in your area.
1. Check local codes. The installation must
complywiththeirrulings.Donotinstallthis
heaterin a mobilehome or trailer.
2. Alwaysconnectthisheatertoachimneyor
vent to the outside. Never vent to another
roomor insidea building.
3. DonotconnectaWOODburningheaterto
an aluminum Type B gas vent. This is not
safe and is prohibited by all codes. This
heater requires connection to approved
chimneys:Eitherafactorybuilt6"UL103HT
or a lined and approved and recently in
spected and cleaned masonry chimney
with a 6" flue, preferably round. A larger
masonry flue may be used, so long as the
flue-sectiondiameterisnotgreaterthan50
sq. in.
Thechimneyportion(whetherfactory-built

18 3
BAROMETRIC DRAFT REGULATOR
Model DR6
SAFETY NOTICE
In the unlikely event that your 2941 "overfires" (a condition evidenced by elbows,
stovepipes, and connectors glowing red in appearance or otherwise discoloring),
thenyourinstallationissubjecttoexcessivedraftcreatedbyeitherachimneytootall
or too great in diameter in conjunction with its height, or some other factor of an
indeterminate cause. In this event, you should install a barometric draft regulator.
Such installation will preclude any overfiring and/or any hazardous consequences
of potential overfiring.
Barometricdraftregulatorsaregenerallyavailablewhereyoupurchasedyourstove
ormay be ordereddirectly from UnitedStates Stove Companyat a nominalcharge.
2001 Consumer Price:
$24.00 - Includes Shipping and Handling
NOTE:
DURING OPENING AND CLOSING OF THE FEED AND ASH DOORS
OF THIS HEATER, IT MAY SEEM THAT THE FIT OF THE DOOR IS
"TOO TIGHT". AS THE HEATER IS FIRED, THE GASKETING
"SETTLES" OR "SEATS" ITSELF IN THE DOOR. THE TIGHT FIT AT
THE FACTORY AND BEFORE THE HEATER'S INITIAL FIRING IS TO
INSURE A GOOD SEAL AFTER THE GASKETING "SETTLES".
NOTE:
FOR YOUR SAFETY, WE RECOMMEND INSTALLING SMOKE
DETECTORS IN YOUR HOME IF NOT ALREADY INSTALLED.
ormasonry)mustbetallenoughtoprovide
sufficient draft and safe exit of smoke and
combustionproducts.PleaserefertoPage
5.
4. Be sure that your Chimney is safely con
structedand ingood repair. Havethe chim
ney inspected by the Fire Department or a
qualifiedinspector (such as a Chimney
sweep).Your insurance company may be
abletorecommendaqualified inspector.
5. Inspectchimneyconnector and chimney
twicemonthlyduringtheheatingseasonfor
anydepositofcreosote orsootwhichmust
beremoved.
6. Provideairforcombustionfromoutsidethe
house into the room where the heater is
located.Iftheintakeisnotinthesameroom,
air must have free access to the room.
7. CAST IRON PARTS MUST BE "SEA
SONED" TO AVOID CRACKING. BUILD
ONLY SMALL FIRES ON FIRST USE.
8. To prevent injury, do not allow anyone to
use this heater who is unfamiliar with the
correctoperationoftheheater.Donotallow
children to use or in any way operate this
heater.
9. Forfurtherinformationonusingyourheater
safely, obtain a copy of the National Fire
ProtectionAssociation(NFPA)publication
"UsingCoalandWoodStovesSafely"NFPA
No.HS-10-1978.TheaddressoftheNFPA
isBatteryMarchPark,Quincy,MA.02269.
10. Keep the ash pit section free of excess
ashes. Do not allow ashes to stack higher
than the sides of the ash pan.*
11. DISPOSAL OF ASHES- Ashes should be
placedinametalcontainerwithatightfitting
lid. Keep the closed container on a non-
combustible floor or on the ground, well
awayfromall combustiblematerials. Keep
the ashes in the closed container until all
cindershavethoroughlycooled.Theashes
may be buried in the ground or used as
fertilizer.
12.CAUTION:Thespecialpaintsusedonyour
heatermaygive offsomesmokewhilethey
are curing during first few fires. Build small
firesatfirst. Themetalused inconstruction
of the heater has a light coating of oil. This
could give off smoke and/or odors when
heater is used for the first couple of times.
Thisshould disappear after a shortperiod.
Once this burn-off has occurred, it should
notreoccur.
13.CARING FOR PAINTED PARTS- This
heaterhasapaintedoutsidejacket,whichis
durablebutwillnotstandroughhandlingor
abuse.Wheninstalling yourheater, use
careinhandling.Cleanwithsoapandwarm
water when heater is not hot. DO NOT use
any harsh chemicals (acids or caustics) or
scouringpowder,asthesewearanddullthe
finish.
14.KEEPTHEFEEDDOOR,ASHDOORAND
CABINETDOORCLOSEDATALLTIMES
EXCEPTWHILETENDINGTHEHEATER.
DO NOT OVERFIRE THE HEATER. THIS
WILL HAPPEN IF THE FEED DOOR, OR
PARTICULARLYTHEASHDOOR,ISLEFT
OPENDURINGOPERATION.UNDEREX
TREME CONDITIONS THIS CAN PRO
DUCE DANGEROUS RESULTS. AT A
MINIMUM,ITWILLALLOWTHEPAINTTO
DISCOLOR.
* Never allow ashes to contact the grate(s).
CAUTION: DO NOT TOUCH THE
HEATER UNTIL IT HAS COOLED.
ALWAYS WEAR GLOVES WHEN
REFUELING THIS UNIT OR WORKING
WITH METAL CABINET PARTS.
MINIMUM CLEARANCES TO COMBUSTIBLE WALLS AND CEILINGS
Minimumclearancestounprotectedcombustiblewallsandceilingsasnotedbyfigures2through
4mustbemaintained. Drapes,curtains,furnitureandothercombustiblematerialsshouldbekept
muchfurtherawayfromtheheatertoavoidfire. Ifyouchooseto,youmayinstalltheheaterand
chimney connector closer to combustible surfaces than indicated by Figures 2 through 4 IF a
clearance reduction system is also installed to protect combustible ceilings and walls near the
heaterandchimneyconnector. However, therearelimits to howclosethe heaterandchimney
connectorcanbeinstalledtocombustiblesurfacesprotectedbyaclearancereductionsystem.
Acorrectlyinstalledclearancereductionsystemprotectsthecombustiblesurfaceswellbeyond
thesidesandabovethetopoftheheaterandbeyondthesidesandtopofthechimneyconnector
pipe.
Twocommontypesof clearancereductionsystemsuse sheetmetalwitha minimum thickness
of28gauge(galvanizedsteel,aluminum,copper)ora3-1/2inch(4inchnominal)thickmasonry
wall. Eitherof these materials mustbe spaced out 1 inch from the combustible surfaces. With
sheetmetal,non-combustiblespacersareusedtomaintainthe1inchairspace. Withamasonry
wall,metalwalltiesandfurringstrips,ifneededareusedtoanchorthebricktothewall. Toavoid
excessive heat transmission, the spacers or wall ties should not be placed directly behind the

25"
35"
16"
26"
54"
19 1/4"
36"
4 3/4"
NOTE: DASHED LINES SHOW
STRAIGHT UP AND THROUGH
THE WALL INSTALLATION
17" 32 1/4" 16"
FLOOR PROTECTOR
(TOP VIEW)
SIDEWALL
NON-COMBUSTIBLE
CONSTRUCTION IN
ACCORDANCE WITH
NFPA 211
12"
12"
WONDERWOOD
Fig. 2
Fig. 4
Fig. 3
4
REPAIR PARTS LIST - MODEL 2941 (SEE PAGE 18)
AUTOMATIC WOOD BURNING CIRCULATOR
Key No. Description Qty. Part No.
1 Heat Jacket Assembly 1 68619
2 Base Weldment 1 67859
3 Smoke Curtain 1 22090
* Smoke Curtain Bracket 2 22171
4 Flue Collar 1 40246
5 Flue Collar Gasket 1 88032
6 Draft Damper Frame 1 40075
7 Draft Control Damper 1 23476
8 Draft Damper Hinge Pin 1 17200
9 Clip Spring 1 83818
10 Fire Grate 2 40076
11 Liner 3 40100
12 Firebrick 10 89066
13 Top Brick Retainer 2 40132
FeedDoor Assembly 68621
Ash Door Assembly 68620
14 FeedDoor 1 40199
15 Ash Door 1 40289
16 DoorLatch 2 22108
17 DoorHandle 2 40091
18 FeedDoorRope Gasket 3.75FT 88033
19 Ash Door Rope Gasket 2.5FT 88033
20 1/4-20Kep Nut 2 83250
21 5/16 ID, 3/4 OD Washer 2 83045
22 LatchSpacer 2 21467
23 DoorHinge Pin (Short) 1 83872
24 DoorHinge Pin(Long) 1 23441
25 HeatShield 1 23475
26 DropWoodenHandle 1 89523
27 Ash Pan 1 67444
28 SolidDamper 1 D6
29 TopLiner 1 23474
30 HeatShield 1 22110
31 SecondaryHeatShield 1 22030
* NOT SHOWN
17
1. The chimney connection should be as airtight as possible. The heater must have its own
chimney flue. Do not connect this unit to a chimney flue serving another appliance. If there
is no chimney near where you wish to place the heater, you can use a UL 103HT Residential
Type and Building Heating Appliance Chimney (Fig. 5, 6, 6A & 6B).
2. Place the heater on solid masonry or solid concrete. When the heater is used on a
combustible floor protector of one layer of 3/8" millboard having a thermal conductivity of
K=0.84 BTU in./ft. 2 hr. Deg. F with 28-gauge sheet metal or a UL Listed floor protector. Have
thefloor protector extend 16" beyondthe door side of theheater and under the connectorpipe
in the back.
3. Check Figures 2, 3, and 4. Be sure you have the clearances shown from the heater and
the connector pipe to combustible surfaces. If you have a solid brick or stone wall behind your
heater, you can place the heater as close as you wish to the wall. If the wall is only faced with
brick or stone, treat it as a combustible wall.
LOCATING THE HEATER
AS A LOCATION IS SELECTED,
KEEP THE FOLLOWING IN MIND:
heaterorchimneyconnector. The1inchairspaceprovidesfreeaircirculation. Itisessentialthat
therebeopeningsatthetopandbottomoftheseclearancereducerssocoolaircanenteratthe
bottomand hotair exit at the top. It is the"chimney effect"whereby whenthe airin thespace is
heated,itrisesexitingfromthetopandbeingreplacedbycoolerairatthebottom,thatmakesthese
shieldseffective.
Masonry,orothernon-combustibleproducts,attacheddirectlytoacombustiblesurfacewithout
an air space offer very little protection and cannot be considered a clearance reducer unless
specifiedmaterials havebeen testedand listed for direct attachmentto acombustible surface.
Thesameappliesto thinveneerbrick andstonecoverings. These materials provideadequate
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. Always look for a safety listing label on the product when
selectingaclearancereductionsystemandmakesureitisdesignedforsolidfuelappliances. The
manufactures of these systems provide specific installation instructions that must be followed
exactlyfor a safe installation.

5
17
8
9
10
11
12
13
14
7
6
4
5
3
2
1
15
16
17
18
32
19
20 21
23
24
29
25
26
27 22
REPAIR PARTS AUTOMATIC WOOD BURNING CIRCULATOR HEATER MODEL 2941 - INTERIOR
16
22
21
20
30
31
28
16
of which is apparent: The chimney
providesameansforexhaustingsmoke
andfluegasesresultingfromcombustion
of the fuel. Secondarily, though, the
chimney provides "Draft" which allows
oxygen to be continuously introduced
into the appliance, so that proper
combustion is possible. As of April 1,
1987, all heaters and furnaces
manufactured by United States Stove
Company should be installed using a
factory built chimney that meets the
"TypeHT"requirementofUL103(when
a factory - built chimney is used).
IMPORTANT
*Size the chimney to the flue outlet on
the stove. (6" outlet = 6" I.D. chimney)
*Avoid using elbows except as
necessary (they reduce draft).
*Make sure all horizontal runs of con-
nector pipe go up hill (1/4" elevation for
each horizontal foot).
CHIMNEY CONNECTION
Two basic types of chimneys are ap-
proved for use with solid fuel: Factory-
builtandmasonry.Factory-builtchimney
must comply with UL103HT standard.
Do not expect your stove or furnace to
createdraft.Draftisnotafunctionofthe
appliance. Draft is purely a function of
the chimney. Modern stoves and
furnaces are much more air-tight and
efficient than those of the past and,
therefore require greater draft. A
minimum of .05, measured in water
column (gauges to measure chimney
draftarereadilyavailableatstoveshops
andareeconomicaltopurchaseorrent)
isrequiredforproperdraftingtoprevent
back-puffing, smoke spillage, and to
maximize performance.
Chimneys perform two functions - one
FIG. 5 FIG. 6
Cathedral Ceiling - Chimney
Cap Mandatory
PIPE
FLOOR PROTECTOR
REFER TO CHIMNEY
MANUFACTURERS PARTS
AND INSTRUCTIONS
2 FT MIN.
10 FT. 3 FT.
MIN.
BAROMETRIC
DRAFT CONTROL
(OPTIONAL)
11 FT. MIN.
CHIMNEY CAP MANDATORY
PIPE
FLOOR PROTECTOR
REFER TO CHIMNEY
MANUFACTURERS PARTS
AND INSTRUCTIONS
2 FT MIN.
10 FT. 3 FT.
MIN.
BAROMETRIC
DRAFT CONTROL
(OPTIONAL)
11 FT. MIN.
CHIMNEY CAP MANDATORY
31 30
DAMPER DAMPER