United States Stove Furnace 1357M User Manual

Models 1357M & 1557M  
OWNER'S MANUAL  
SOLID FUEL  
WARM AIR FURNACE  
FOR PARALLEL INSTALLATION WITH EXISTING FORCED AIR-GAS OR OIL  
FIRED FURNACE (U.S. ONLY)  
FOR INSTALLATION AS A CENTRAL FURNACE  
ALL MODELS CERTIFIED UNDER UL 391  
IMPROPER INSTALLATION MAY  
VOID YOUR WARRANTY  
CAUTION:  
READALLINSTRUCTIONSCARE-  
FULLY BEFORE STARTING THE  
INSTALLATIONOROPERATING  
THE FURNACE  
DO NOT USE THIS FURNACE  
IN A MOBILE HOME OR TRAILER  
UNITED STATES STOVE COMPANY  
227 Industrial Park Road  
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P.O.Box 151  
South Pittsburg, TN 37380  
(423) 837-2100  
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85591T  
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Caution Labels  
Your Furnace has the following labels. Read and Obey all labels.  
DANGER: RISK OF FIRE OR EXPLOSION.  
DO NOT burn garbage, gasoline, drain oil, or other flammable liquids.  
WARNING: FIRE HAZARD.  
DO NOT operate with fire draft exceeding .06 inches w.c.  
DO NOT operate with fuel loading or ash removal doors open.  
DO NOT store fuels, paints, thinners, flammable liquids, or other highly volatile sub-  
stances in the furnace room.  
CAUTION:  
HOT SURFACES! Keep children away. Do not touch during operation.  
CAUTION!  
INSPECT FLUE PIPES, FLUE PIPE JOINTS AND FLUE PIPE SEALS  
REGULARLYTO ENSURE THAT SMOKEAND FLUE GASESARE NOT  
DRAWNINTO,ANDCIRCULATEDBY,THEAIRCIRCULATIONSYSTEM.  
CAUTION!  
CLEANOUT OF THE HEAT EXCHANGER, FLUE PIPE, CHIMNEY,AND  
DRAFTINDUCER(IFUSED),ISESPECIALLYIMPORTANTATTHEEND  
OF THE HEATING SEASON TO MINIMIZE CORROSION DURING THE  
SUMMER MONTHS, CAUSED BY ACCUMULATED ASH.  
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 of-  
ficials about restrictions and installation inspection requirements in your  
area. If not already installed, we recommend that smoke detectors be  
installed.  
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Rules for safe installation and operation  
Read these rules and the instructions carefully. Failure to follow them will cause a  
hazard that could result in death, serious bodily injury, and/or property damage.  
1. Checkyourlocalcodes. Theinstallationmustcomply 13. CAUTION- The special paints used on your furnace  
with their rulings.  
maygiveoffsome smokewhiletheyarecuringduring  
first few fires., Build small fires at first. The metal  
usedinconstructionofthefurnaceandductworkhas  
a light coating of oil. This could give off smoke and/  
or odor from registers when furnace is used for the  
first time. This should disappear after a short period  
of time. Once this burn-off has occurred, it should  
not reoccur.  
2. Do not install this furnace in a mobile home or trailer.  
3. Always connect this furnace to a chimney and vent  
to the outside. Never vent to another room or inside  
a building.  
4. Do not connect this furnace to an aluminum Type  
B gas vent. This is not safe and is prohibited by  
the National Fire Protection Association Code. This  
furnace requires a masonry or Listed Factory Built  
Chimney for residential type or Building Heating  
Appliance Chimney. Use a 6" diameter chimney or  
larger, that is high enough to give a good draft.  
14. CARING FOR PAINTED PARTS- This furnace has  
a painted outside jacket, which is durable, but it will  
not stand rough handling or abuse. When installing  
your furnace, use care in handling. Clean with soap  
and warm water when furnace in not hot. DO NOT  
use any acids or scouring soap, as these wear and  
dull the finish. DISCOLORATION WILL OCCUR  
IF THE FURNACE IS OVERHEATED. FOLLOW  
OPERATING INSTRUCTIONS CAREFULLY.  
5. Be sure that if a masonry chimney is used, it is safely  
constructed and in good repair. Have the chimney  
inspected by the Fire Department or an inspector.  
6. Inspect chimney connector and chimney before and  
frequently during the heating season for any deposit  
of creosote or soot which must be removed.  
15. Keep the feed and ash doors closed at all times  
except while tending the furnace.  
7. Provide air for combustion into the room where the  
furnace is located. If the intake is not in the same  
room, air must have free access to the room.  
CAUTION  
GASES THAT ARE DRIVEN FROM FRESH COAL  
MUST BE BURNED OR THEY WILLACCUMULATE  
AND EXPLODE. NEVER SMOTHER A FIRE WHEN  
ADDING FRESH COAL.  
8. CAST IRON PARTS MUST BE "SEASONED" TO  
AVOID CRACKING, BUILD ONLY SMALL FIRES  
ON FIRST USE.  
9. To prevent injury, do not allow anyone to use this  
furnace who is unfamiliar with the correct operation  
of the furnace.  
CAUTION  
DO NOT OPERATE WITH THE FEED AND/OR ASH  
DOOR OPEN. THIS FURNACE IS DESIGNED FOR  
THERMOSTATIC OPERATION. OPERATION WITH  
ANY OF THESE DOORS OPEN WILL OVERHEAT  
AND DAMAGE THE FURNACE.  
10. For further information on using your furnace safely,  
obtain a copy of the National Fire Protection Asso-  
ciation (NFPA) publication "Chimney's, Fireplaces  
and Solid Fuel Burning Appliances" NFPA 211. The  
address of the NFPA is Batterymarch Park, Quincy,  
MA 02269.  
CAUTION  
11. Keep the ashpit section free of excess ashes. Do  
not allow ashes to stack higher than the sides of the  
ash pan.  
NEVER USE GASOLINE, GASOLINE-TYPE LAN-  
TERN FUEL, KEROSENE, CHARCOAL LIGHTER  
FLUID, OR FLAMMABLE LIQUIDS TO START OR  
"FRESHEN UP" A FIRE IN THE FURNACE.  
12. DISPOSAL OF ASHES- Place ashes in a metal  
container with a tight fitting lid. Keep the closed  
containeronanoncombustibleoororontheground,  
well away from all combustible materials. Keep the  
ashes in the closed container until all cinders have  
thoroughly cooled. The ashes may be buried in the  
ground or picked up by a refuse collector.  
WARNING  
NEVERSTOREFLAMMABLELIQUIDS,ESPECIALLY  
GASOLINE, IN THE VICINITY OF THE FURNACE.  
Your Furnace is designed to be installed in a parallel air flow arrangement with a gas or oil-  
fired forced air upflow-type central furnace, or it may be installed as a central furnace.  
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HOW THE FURNACE FUNCTIONS  
Your HOTBLAST Furnace is designed to be a  
supplemental or central heating source for your  
home. This Solid Fuel Furnace may be installed  
in conjunction with a properly operating central  
furnace that is listed or certified in accordance  
with nationally recognized safety standards and  
equipped with the required controls and other  
safety features and which has been installed in  
accordance with appropriate standards of the  
National Fire ProtectionAssociation with installa-  
tionclearancesspecifiedinthefurnacenameplate  
marking. The installation must be accomplished  
by a qualified agency (one who is engaged in,  
and is responsible for, or is thoroughly familiar  
with the installation and operation of the gas, oil,  
and solid fuel burning heating appliances, who  
is experienced in such work, familiar with all the  
requirements of the authority having jurisdiction.)  
The installation shall be in strict accordance with  
the manufacturer's installation instructions fur-  
nished with the solid fuel furnace.  
PARALLEL INSTALLATION: (U.S. ONLY)  
The design is such that when the blower comes  
on, the blower on the central system also comes  
on. The blower will only come on when the tem-  
perature in the plenum has reached the setting  
on the blower control. This is to insure that there  
is sufficient warm air in the system to make it ef-  
ficient for the unit to operate. When the central  
systemthermostatcallsforheat,thecentralsystem  
will operate by the burner igniting and the blower  
coming on. It is possible that both systems will  
operate simultaneously. It is recommended that  
for the most efficient use of your HOTBLAST Fur-  
nace, that it be fired as much as possible in order  
to reduce the demand on your existing central  
heating system. This unit has an optional forced  
draft kit that operates from a wall thermostat.  
When the temperature falls below the setting on  
the wall thermostat, the forced draft will come on  
(U.S. Stove Option 11/DIKL)  
The warm air supply outlet of the HOTBLAST  
Furnace shall not be connected to the cold air  
return of the central furnace, because the possi-  
bility exists of components of the central furnace  
overheating and causing the central furnace to  
operate other than is intended.  
The chimney connector of the furnace is to be  
installed to provide clearances to combustible  
material not less than specified in the individual  
classifications and marked on the furnace. The  
chimney connector must be connected to a chim-  
neysuitableforusewithresidentialtypeorbuilding  
heating appliances which burn solid fuel.  
SERIES INSTALLATION:  
This type of installation uses only the blowers of  
the existing central furnace. The solid fuel fan/  
limit control must also control the functions of the  
existing furnace. All electrical power must come  
from a single branch circuit.  
TheFurnaceisdesignedtooperateineitherparal-  
lel or series air flow arrangement with the central  
furnace or as a central furnace.  
CENTRAL FURNACE INSTALLATION:  
As a central furnace, the unit functions indepen-  
dently of any other system. The blower will come  
on when the plenum temperature reaches the  
setting on the blower control.  
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DIMENSIONS OF FURNACE  
Figure 1  
Model 1357M  
Figure 2  
Model 1557M  
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Locating the Furnace  
18"  
1. The furnace should be located in the same  
room as the central system and as close as  
possible, but not closer than 9". There should  
be no wall between the furnace and the warm  
air outlet duct that is connected directly to the  
warm air outlet plenum of the central furnace.  
(See Fig. 4)  
6" CHIMNEY  
21"  
CENTRAL  
FURNACE  
12"  
9"  
2. Place the furnace on a noncombustible floor.  
3. Check figures 3 through 5. Be sure you have  
the clearances shown below from the furnace  
and the connector pipe to combustible sur-  
faces. If you have a solid brick or stone wall  
behindyourfurnace,youcanplacethefurnace  
as close as you wish to the wall. If the wall  
is only faced with brick or stone, treat it as a  
combustible wall.  
48"  
Figure 4  
1357M  
12"  
1557M  
12"  
18"  
Unit to Sidewall  
Unit to Backwall  
(305mm) (305mm)  
30" 30"  
(760mm) (760mm)  
48" 48"  
(1.22m) (1.22m)  
18" 21"  
(460mm) (530mm)  
18" 18"  
(460mm) (460mm)  
6" 6"  
6" SOLID DAMPER  
Front of Unit to  
Combustible  
6" BAROMETRIC  
DRAFT REGULATOR  
Chimney Pipe  
to Sidewall  
18"  
Chimney Pipe  
to Backwall  
Plenum to  
Combustibles (150mm) (150mm)  
PLENUM  
TO  
6" MIN.  
CEILING  
2" MIN. AIR SPACE  
REQUIRED BY CODE  
NON-COMBUSTIBLE FLOOR  
Figure 5  
CENTRAL  
FURNACE  
Figure 3  
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Chimney Connection  
MASONRY CHIMNEY  
Beforeusinganexistingmasonrychimney,clean  
the chimney and inspect the flue liner to be sure  
it is safe to use. Make repairs before attaching  
the furnace. The connector pipe and fittings  
you will need to connect directly to a masonry  
chimney are shown.  
THIMBLE  
6" ELBOW  
6" SOLID DAMPER  
6" BAROMETRIC  
DRAFT REGULATOR  
The chimney connection should be as short as  
possible.  
6" CHIMNEY  
CONNECTOR  
Iftheconnectorpipemustgothroughacombus-  
tible wall before entering the masonry chimney,  
consult a qualified mason or chimney dealer.  
Theinstallationmustconformtolocalrecodes,  
and N.F.P.A. 211.  
6" ELBOW  
DO NOT CONNECT THIS FURNACE TO  
A CHIMNEY FLUE SERVING ANOTHER  
APPLIANCE.  
Thechimneyusedforafurnacemustnotbeused  
to ventilate the cellar or basement. If there is  
a cleanout opening at the base of the chimney,  
close it tightly.  
Figure 6  
LISTED FACTORY BUILT CHIMNEY  
2' MIN.  
Carefullyfollowchimneymanufacturer'sinstruc-  
tions. Use only a Listed Residential Type or  
Building Heating Appliance Chimney. If your  
chimney starts at the ceiling (Fig. 7), you will  
need enough 6" pipe to reach the ceiling.  
REFER TO CHIMNEY  
MANUFACTURER'S  
INSTRUCTIONS AND  
PARTS.  
10'  
3' MIN.  
The top of the chimney must be at least 3 feet  
above the roof and be at least 2 feet higher than  
any point of the roof within 10 feet (Fig. 7).  
6" SOLID DAMPER  
6" BAROMETRIC  
DRAFT REGULATOR  
6" CHIMNEY CONNECTOR  
6" ELBOW  
Figure 7  
8
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Rules for Connector Pipe Installation  
1. Thecrimpedendofthechimneyconnectortsinside  
thefurnaceuecollar. Installadditionalchimneycon-  
NOTE:  
A flue pipe shall not pass through an attic, roof  
space,closetorsimilarconcealedspace,aoor  
or ceiling of combustible construction. Where  
passage through a wall or partition is desired,  
installation must conform with UL standards.  
nectorsandelbowwiththeCRIMPEDENDTOWARD  
THE FURNACE. This will allow any condensation  
in the flue to run back into the furnace. Use 6" dia.  
steel pipe and elbows for connection to chimney.  
Never use less than 24 gauge and although blued  
steel is satisfactory, high temp painted black is much  
more desirable. (See Figure 8)  
2. Slopeanyhorizontalpipeupwardtowardthechimney  
at least 1/4 inch for each foot of horizontal run.  
3. You must have at least 18 inches of clearance be-  
tween any horizontal piping and the ceiling.(See Fig.  
5)  
4. The chimney connector must not extend into the  
chimney flue. (See Fig. 9)  
5. Seal each chimney connector pipe joint with furnace  
cement. Also seal the pipe at the chimney.  
6. Use 3 sheet metal screws at each chimney pipe joint  
to make the piping rigid.  
Figure 8  
7. The chimney connector may include a section for a  
barometric draft regulator between the furnace and  
the chimney (Fig. 6, 7, & 10). The barometric draft  
regulator must be installed in the same room (same  
pressure zone) as the furnace.  
8. Install the barometric draft regulator strictly in ac-  
cordance with the instructions that are provided with  
the barometric draft regulator.  
RIGHT  
WRONG  
WRONG  
9. Asoliddampermustbeusedinthechimneyconnect-  
ing pipes between the flue collar and the chimney.  
When used in conjunction with a barometric draft  
regulator, the solid damper must be placed between  
the barometric and the chimney. (See Fig. 6, 7, & 10)  
Figure 9  
NON COMBUSTIBLE  
INSTALLATION PER  
NFPA 211  
AdjustingtheBarometricDraftRegulator  
6" SOLID DAMPER  
6" BAROMETRIC  
1. Drill a hole in the chimney connector within 18" of  
the flue collar below the barometric draft regulator  
just large enough for the tube of the manometer.  
DRAFT REGULATOR  
MEASURE FLUE DRAFT HERE  
2. Build a fire after all chimney connections have been  
made.  
3. Use a manometer to measure the draft in the flue.  
4. Adjust the Barometric Draft Regulator to obtain a  
draftof0.05-0.06"W.C. understablereconditions.  
Figure 10  
9
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CONNECTION OF CHIMNEY CONNECTOR TO A MASONRY CHIMNEY THROUGH A COMBUSTIBLE WALL  
Figure 8 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  
combustible wall. NFPA Standard 211 allows the following wall pass-through systems.  
Figure 11  
10  
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FIGURE 12, PART A  
MINIMUM CHIMNEY CLEARANCE TO  
BRICK AND COMBUSTIBLES IS 2 IN.  
MINIMUM CLEARANCES 12 IN.  
OF BRICK ALL AROUND  
CHIMNEY CONNECTOR  
TO HEATER  
FIRE CLAY LINER  
MINIMUM 12 IN.  
(5/8" MIN. WALL THICKNESS)  
TO COMBUSTIBLES  
MASONRY CHIMNEY  
CONSTRUCTED TO  
NFPA211  
MIN. 3-1/2" THICK BRICK  
MASONRY WALL  
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 connector pipe. The fireclay liner shall  
run from the outer surface of the brick wall to, but not beyond, the inner surface of the chimney flue and shall be firmly cemented  
in place. See Part A.  
MINIMUM CHIMNEY CLEARANCES FROM MASONRY TO  
SHEET STEEL SUPPORTS AND COMBUSTIBLES 2 IN.  
FIGURE 12, PART B  
FACTORY-BUILT  
MINIMUM CLEARANCE  
CHIMNEY LENGTH  
9 IN. ALL AROUND  
NONSOLUBLE  
REFACTORY  
CEMENT  
CHIMNEY CONNECTOR  
TO HEATER  
CHIMNEY LENGTH  
FLUSH WITH INSIDE  
OF FLUE  
USE CHIMNEY MFRS. PARTS TO  
ATTACH CONNECTOR SECURELY  
AIR SPACE  
9 IN. MINIMUM  
SOLIDINSULATED, LISTED  
FACTORY-BUILT CHIMNEY LENGTH  
MASONRY CHIMNEY CONSTRUCTED  
TO NFPA 211  
SHEET STEEL SUPPORTS  
(24 GAUGE MIN. THICKNESS)  
2. Use a solid insulated listed factory-built chimney length having an inside diameter of 6" and having 1" or more of solid 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 and shall be sealed to the flue and to the brick ma-  
sonry penetration with nonwater-soluble refractory cement. Sheet steel supports which are at least 24 gauge (0.024") in thickness  
shall be securely fastened to wall surfaces on all sides. Fasteners between supports and the chimney length shall not penetrate  
the chimney liner. See Part B.  
FIGURE 12, PART C  
MINIMUM CHIMNEY CLEARANCES FROM MASONRY TO  
SHEET STEEL SUPPORTS AND COMBUSTIBLES 2 IN.  
24 GAUGE  
VENTILATED THIMBLE WITH  
TWO 1 INCH AIR CHANNELS  
CHIMNEY THIMBLE  
CHIMNEY CONNECTOR  
TO HEATER  
TWO VENTILATED AIR  
CHANNELS EACH 1 INCH.  
CONSTRUCTED OF  
SHEET STEEL.  
MINIMUM 6 IN. GLASS  
FIBER INSULATION ALL AROUND  
SHEET STEEL SUPPORTS  
(24 GAUGE MIN. THICKNESS)  
MASONRY CHIMNEY CONSTRUCTED  
TO NFPA 211  
3. Use a 10" diameter ventilated thimble made of at least 24 gauge (0.024") steel having two 1" air channels. The ventilated thimble  
must be separated from combustible materials by a minimum of 6" glass fiber insulation. The opening inthecombustiblewallshall  
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 to fit and hold the chimney section. Fasteners  
used to secure chimney sections shall not penetrate chimney flue liner. See Part C.  
11  
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MINIMUM CHIMNEY CLEARANCES FROM MASONRY TO  
SHEET STEEL SUPPORTS AND COMBUSTIBLES 2 IN.  
FIGURE 12, PART D  
SHEET STEEL SUPPORTS  
CHIMNEY SECTION  
MINIMUM CLEARANCE  
2 IN. ALL AROUND  
1 IN. AIR SPACE TO  
CHIMNEY LENGTH  
CHIMNEY THIMBLE  
CHIMNEY  
CONNECTOR  
CHIMNEY CONNECTOR  
TO HEATER  
SOLIDINSULATED, LISTED  
FACTORY-BUILT CHIMNEY  
LENGTH (12 IN. LONG MIN.)  
AIR SPACE  
2 IN.  
SHEET STEEL SUPPORTS  
(24 GAUGE MIN. THICKNESS)  
MASONRY CHIMNEY CONSTRUCTED  
TO NFPA 211  
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 sheet steel support plates on both ends of  
the chimney section. The opening in the combustible wall shall be covered and 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 chimney section. Fasteners used to secure chimney sections shall not  
penetrate chimney flue liner. See Part D.  
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 the chimney connector through a combustible wall for connection to a masonry chimney.  
Additional requirements pertaining to Figure 8 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 conduc-  
tivity 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. A chimney thimble, as shown for 3" and 4" above (Parts C and D) shall be for types "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 sized for the proper snug fit of a 6" diameter chimney  
connector pipe. The thimble shall be installed without damage to the chimney flue. The thimble shall extend through the chimney  
wall to, but not beyond, the inner surface of the chimney flue and shall be permanently cemented in place with high temperature  
cement.  
4. A chimney connector to a masonry chimney, except for 2" above (Part B), shall extend through the wall 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.  
PART E - (Figure 12)  
In addition to the methods shown by A, B, C, and D of Figure 12, 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 con-  
nector through a combustible wall for a connection to a masonry chimney.  
CONNECTION OF CHIMNEY CONNECTOR TO A MASONRY CHIMNEY WHEN CHIMNEY CONNECTOR  
DOES NOT PASS THROUGH A COMBUSTIBLE WALL  
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  
Figure 12. Remember, the chimney connector should extend into the chimney thimble to the innerface of the chimney  
flue but not beyond; if the chimney connector is extended through the chimney thimble into the chimney flue, resistance  
to the flow of smoke and gases up the chimney will occur; that flow resistance will have an adverse affect on the opera-  
tion and performance of the heater and venting system.  
12  
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Assembly of Furnace  
Your furnace requires the following items to be as-  
sembled or installed by the service person:  
Feed Door Pull Handle  
Feed Door Locking Handle  
Blowers and Blower Controls  
Electrical Connections  
1. Remove all parts from inside the furnace and in-  
spect for damage, including the firebrick as some  
breakage could occur during shipment.  
2. Assemble the Damper Box Assembly to the Feed  
Door and the Black Knob to the Damper Box if not  
already installed. Ensure the damper operates  
by sliding the knob up and down. Damper should  
operate freely with slight tension.  
Figure 13  
3. Attach feed door locking handle as in Figure 14  
withscrewsandnutsprovided. Note:Slottedholes  
are for adjustment of handle. Adjust handle until  
some pressure is required to lock feed door during  
firing sequence.  
4. Install the thermodisc on rear of furnace cabinet  
with the two screws provided. Mount the conduit  
assembly from the junction box to the thermostat  
bracket. Crimp the two female terminals to each  
ofthewireleads. Plugthewirestothethermodisc.  
NOTE: It does not matter which of the two wires  
plugs to which terminal on the thermodisc.  
Figure 14  
THERMODISC  
5. Remove blowers from cartons. Remove junction  
box cover. Attach clip nuts as in Figure 15. Install  
blower(s) and gasket(s) with 1/4"-20 x 3/4" bolts  
as shown.  
THERMODISC  
COVER  
6. Wire right side blower first (See wiring diagram)  
and replace cover on junction box on blower.  
4ELECTRICAL  
JUNCTION BOX  
7. Wireleftblowersameasaboveandreplacecover.  
8. Checkoperationofshakergrateswithgratehandle  
before operating furnace.  
BLOWERS  
CLIP NUTS  
(Not used in the upper center hole.)  
BLOWERS GASKET  
Figure 15  
(Model 1357M has only one blower)  
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WIRING DIAGRAM  
Figure 16  
NOTE:  
For model 1357M, disregard the wiring (wires M1 & M2) of  
one blower motor.  
Wire leads from the distribution blower are usually BOTH BLACK.  
Makes no difference which leads from the motor(s) connects to  
the corresponding leads coming out of the conduit.  
14  
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d) Install the smoke pipe connector to the chimney  
with 26-gauge pipe and elbows (to be purchased  
separately), maintaining the proper clearances  
for the specific model. Seal the smoke pipe in  
the chimney with furnace cement. (The chimney  
connectorshallbesecurelysupported,andjoints  
fastened with sheet metal screws or rivets.)  
Installation  
Please see all methods of Installation at the  
rear of this booklet.  
This is a furnace, not a free standing stove. You must  
directheatedairfrom8"outletsawayfromthefurnace,  
or it will not function properly.  
e) Install 8" diameter heat pipe to plenum of the  
central hot air furnace. Use 26-gauge pipe and  
connectors (to be purchased separately). If  
central air conditioning is installed in the plenum,  
install heat pipe above the air conditioning unit.  
Secure heat pipe connection with supports and  
sheet metal screws.  
1. Thisinstallationmustbedonebyaqualifiedheating  
equipment installer.  
2. The installation is to be done in compliance with  
National Fire Protection Association installation  
standards: No. 89M, 90B, 211, 70 (National Electri-  
cal Code) and Uniform Mechanical Code 913, 6-4,  
in the states where applicable. (Their code offers  
connecting smoke pipe connectors into chimney  
with other fuel burning appliances.)  
f) Connectelectricalsupplyintheelectricaljunction  
box that is mounted on the back of the Furnace.  
See Wiring Diagram (Fig. 16). Remove the  
cover from electrical junction box and connect  
power supply wires to wires designated, using  
wire nuts. The power cord supplied may be used  
for installation, if permitted by local codes and  
regulations. If the power cord supplied cannot  
be used, the power supply wiring must be 90  
degrees centigrade in a metal cable and should  
be completed by a qualified installer complying  
with NFPA Standard No. 70 and local codes.  
3. Rooms large in comparison with size of the appli-  
ance:  
a) Wood or Coal Burning Furnace needs air for  
combustion and circulation to house.  
b) Provision must be made to make up this air and  
not starve gas or oil furnace of combustion air.  
c) Have the "Authority Having Jurisdiction" deter-  
mine that air is of adequate makeup. (Reference  
N.F.P.A.Nos.30&54,CodeforInstallationofGas  
& Oil Equipment).  
Power Failure Instructions  
Operation after loss of power:  
4. Have the"Authority Having Jurisdiction" to inspect  
all chimneys and installations for adequate venting  
and for compliance with standard and local codes 1. Remove filter if provided  
andregulationsregardinginstallationofwoodburn-  
ing appliances.  
2. Do not expect to keep home at normal tem-  
peratures.  
5. Installation for Supplemental Heat Application to  
Existing Central System.  
3. Do not load fuel above bottom of feed door.  
a) Place Wood or Coal Burning Furnace so that the  
chimney connector will be as short as practical  
and avoiding unnecessary sharp turns in the  
smoke pipe connector and the installation of  
devices that would create excessive resistance  
to the flow of flue gases.  
b) Locate the Wood or Coal Burning Furnace as  
close as practical to the existing central hot air  
heatingsystem,maintainingclearancesasstated  
on the label on the fuel door.  
c) Clearancefromcombustiblematerialsmustcom-  
ply with those stated on the label on the side of  
the unit. Refer to the clearance table in the front  
of this manual.  
The installation must be made only on a noncombus-  
tible floor.  
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Operating Instructions  
FUEL  
Models 1357M & 1557M  
Egg size (1-3/16" or larger) bituminous coal for residential furnaces, or any of the specially packed  
fireplace coals can be used. Coal with a low ash content (2% to 6%) is recommended.  
Hardwood, 18" to 26" should be split and air dried (seasoned) for 6 months.  
LIGHTING  
1. Set the thermostat on "HIGH" for maximum draft.  
2. Open the feed door and place paper and kindling on the grate for starting the fire.  
3. Light the fire and close the feed door.  
4. Add wood or about 15 lbs. of coal (depending on which model) after fire is burning briskly.  
5. "MEDIUM" setting is normally satisfactory. Set higher or lower for your comfort.  
ADDING FUEL  
When starting a fire, add small amounts of fuel instead of adding large quantities of fuel. This will  
give more complete combustion and less build-up of tars or soot in the chimney.  
1. Set thermostat to HIGH before opening feed door.  
2. Wood fire: Add wood to a convenient level.  
3. Coal Fire:  
a.) Never smother the fire when adding coal. Gases from the accumulation smoke will explode  
under certain conditoins. Add fresh kindling if the bed of coals has cooled.  
b.) Add up to 20 lbs. of coal per loading. Never add coal above the bottom of feed door opening.  
c.) Stir the coal and watch the fire. Be sure the new coal is burning briskly before you close the  
doors and turn the thermostat down.  
d.) Shake grates vigorously 1/2" left to right to spill ashes into the ash pan. Do this at least once  
every 12 hours of operation. Empty ash pan regularly. Do not allow ashes to build-up to grate  
as grate will warp and burnout, and you might spill the ashes when removing the pan. Dispose  
of hot ashes properly.  
e.) Rotation of the handle (5 o'clock to 7 o'clock) position will agitate coals and spill ashes into  
ash pan.  
f.) It is advisable for you to get familiar with the shaker grate operation before firing.  
16  
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4. If the chimney is operating too cool, water will  
condense in the chimney and run back into the  
furnace. Creosote formation will be rapid and  
may block the chimney. Operate the furnace at  
a high enough fire to keep the chimney warm,  
preventing this condensation.  
Service Hints  
Do not expect a furnace to draw. It is the  
chimney that creates the draft. Smoke spill-  
age into the house or excessive build-up of  
water or creosote in the chimney are warn-  
ings that the chimney is not functioning  
properly. Correct the problem before using  
furnace. Possible causes are:  
5. If the fire burns well, but sometimes smokes or  
burns slowly, it may be caused by the chimney  
top being lower than another part of the house  
oranearbytree. Thewindblowingoverahouse  
or a tree, falls on top of the chimney like water  
over a dam, beating down the smoke. The top  
of the chimney should be at least 3 feet above  
the roof and be at least 2 feet higher than any  
point of the roof within 10 feet.  
1. The connector pipe may be pushed into the  
chimney too far, stopping the draft.  
2. Do not connect two furnaces or a stove and  
furnace into the same chimney flue.  
3. The chimney used for a furnace must not  
be used to ventilate the cellar or basement.  
If there is a cleanout opening at the base of  
the chimney, it must be closed tightly.  
6. See page 18 for list of trouble shooting tips.  
A draft reading of .05 to .06 w.c. is suggested for proper burning of this unit when us-  
ing wood or bituminous coal as fuel. When using anthracite coal, this draft reading is a  
minimum reading.  
Chimney Maintenance  
Creosote and Soot - Formation and Need for Removal  
When wood is burned slowly, it produces tar and  
otherorganicvapors,whichcombinewithexpelled  
moisture to form creosote. The creosote vapors  
condense in the relatively cool chimney flue of a  
slow-burning fire. As a result, creosote residue  
accumulates on the flue lining. When ignited, this  
creosote makes an extremely hot fire.  
CAUTION  
A chimney fire may cause ignition  
of wall studs or rafters which you  
thought were a safe distance from  
the chimney. If you have a chimney  
fire,haveyourchimneyinspectedby  
aqualifiedpersonbeforeusingagain.  
When coal is burned, the products of combustion  
combinewithmoisturetoformasootresiduewhich  
accumulates on the flue lining. When ignited, this  
soot makes an extremely hot fire.  
The chimney should be inspected at least twice  
monthly during the heating season to determine  
if a creosote or soot build up has occurred.  
If creosote or soot has accumulated, it should be  
removed to reduce the risk of a chimney fire.  
Chimney fires burn very hot. If the chimney  
catches fire, immediately call the fire department,  
then reduce the fire by closing the inlet air control.  
Pour a large quantity of coarse salt, baking soda  
or cool ashes on top of the fire in the firebox.  
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Trouble Shooting Tips for Warm Air Furnace  
1. Problem:  
E. Makesureyou’renotsuffocatingtherewithexces-  
sive amounts of unburned wood.  
Smoke puffs from furnace  
F. Slide baffle should be pulled out prior to load door  
opening.  
Solution:  
A. Checkchimneydraft.Checkforblockedchimneyor  
flue pipe. Use mirror to check chimney clearance.  
4. Problem:  
Distribution blower vibrating  
Solution:  
B. Check ash pit — if it is too full, empty.  
C. Make sure furnace room is not too airtight.  
A. Tighten blower wheel to motor shaft.  
B. Check for bad fan bearings.  
D. Make sure all of chimney mortar connections are  
airtight.  
5. Problem:  
E. Check ash drawer. Make sure it’s airtight.  
Distribution blower continues to run or will not run  
Solution:  
F. Check chimney for possible down-draft caused  
by taller surrounding trees or objects. Correct with  
proper chimney vent cap.  
A. Check fan limit or heat sensor and cable.  
G. Check the possibility of a cold chimney forcing cool  
gases backward. Remedied by properly insulat-  
ing chimney with non-combustible liner — non-  
combustible insulation.  
B. Check to see that blower is properly wired.  
(See Wiring and Assembly Instructions).  
C. Check fuse box or power source.  
D. Check power supply.  
H. Fuel may be too green.  
6. Problem:  
I. Make sure no other fuel burning devices are con-  
nected to the chimney impairing the draft.  
Odor from first fire  
Solution:  
J. Check chimney draft, it should be .06 inches of  
water column. This service is provided by a certi-  
fied chimney sweep.  
A. The odor from new steel should disappear in a few  
hours.  
2. Problem:  
B. If the odor remains, call you dealer immediately. A  
bad weld can cause a fume leak.  
Inadequate heat being delivered to your home  
Solution:  
7. Problem:  
Excessive Creosote  
A. Check home insulation — is it adequate?  
B. Checkhook-uptofurnaceisitinstalledcorrectly?  
Solution:  
A. Check the grade of wood you are burning.  
C. Cool air inlet may be inadequate or furnace room  
too airtight.  
B. Make sure your unit is serviced by its own proper  
chimney.  
D. Your wood fuel may be too low grade. Hardwoods  
are recommended.  
C. Check length of flue pipe and its connections.  
E. Make sure your hot air duct (and other duct work)  
is airtight.  
D. Make sure you are burning the smallest, hottest fire  
to adequately heat your home.  
F. If furnace room is warm but your home isn’t, check  
back draft dampers.  
E. Also see Solutions to Problem one.  
8. Problem:  
G. Is air to the blower available?  
If the fire goes out or does not hold over night  
Solution:  
3. Problem:  
Excess smoke or flames coming out door when refuel-  
ing  
A. Poor Draft.  
B. Incorrect damper settings.  
C. Improper firing methods if burning coal.  
D. More combustion air needed.  
Solution:  
A. Wait 15 seconds and open door SLOWLY — then  
refuel.  
E. Coal not sized to the furnace. We recommend 1”  
to 3” diameter pieces of coal.  
B. Check length of flue pipe to chimney. Your unit  
should be within six (6) feet of your chimney.  
F. Ashes, if allowed to accumulate in the ash pit, will  
not allow passage of the required air for combus-  
tion. Keep ash pit clean.  
C. Make sure chimney cap is not too close to the top  
of the chimney.  
D. Check chimney draft — make sure chimney flue  
pipe is clean and chimney is of adequate height.  
G. This furnace is not to be used with an automatic  
stoker unless so certified.  
18  
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Parts List  
Key Part No. Description  
Model  
Qty.  
Key Part No. Description  
Model  
Qty.  
1357M  
1557M  
1357M  
1557M  
1357M  
1557M  
1357M  
1557M  
1357M  
1557M  
25541G  
1
2
1
2
4
8
4
8
1
1
1
1
1
10  
12  
2
1
2
1
2
1
1
1
1
1
1
3
3
1
1
1
1
1
Cabinet Side (Left & Right)  
2
26  
27  
80230  
89319  
83340  
83339  
Blower  
25467G  
88032  
2
Flue Collar Gasket  
Flue Collar  
2
1
6
6
Gasket, Blower  
1/4-20 Clipnut  
Bolt (1/4-20 x 3/4")  
3
40246  
N/S  
N/S  
83227  
Bolt, 1/4-20 x 1"  
Kep Nut, 1/4-20  
28  
83250  
1357M  
1557M  
1357M  
1557M  
25540G  
23459G  
25561G  
25466G  
4
5
Cabinet Back  
Cabinet Top  
1
1
N/S  
29  
30  
31  
32  
33  
22140  
80131  
80231  
80314  
68234  
Relay Box Bracket  
Junction Box (4 x 4)  
Junction Box Cover  
Thermodisc (60T12)  
Blower Thermostat Bracket  
N/S  
6
891214 8" Collar  
2
1
1
1
1
1
1
1
1
1
1
2
1
2
2
2
68217  
22662  
24232  
Feed Door Assy. (Includes Gasket - 88057)  
7
Bracket, Feed Door  
Spacer, Hinge  
1357M  
1557M  
1357M  
1357M  
1557M  
1357M  
1557M  
8
34  
35  
36  
89066  
40264  
40256  
Firebrick (4.5 x 9 x 1.25)  
Liner, Front/Rear  
9
891097 Locking Mechanism, Feed Door  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
68218  
86626  
83461  
83274  
Ash Door Assy. (Includes Gasket - 88066)  
Latch, Door  
Grate Frame, Shaker  
Washer (1" OD, 7/16" ID)  
Lock Nut, 3/8-16  
37  
40257  
Grate, Shaker  
891098 Handle Assy. w/Handle Bushing  
23859B Draft Cap, Painted  
38  
39  
40  
41  
42  
43  
44  
45  
46  
47  
48  
49  
40260  
40258  
40269  
69396  
25200  
89041  
83278  
83244  
89943  
Handle, Shaker  
Liner - Rear  
89574  
23800  
23787  
83445  
83250  
68238  
68228  
23397  
23398  
Handle, Spring  
1557M  
1557M  
Smoke Curtain  
Liner - Front  
Clip, Smoke Curtain  
1/4-20 x 1-1/4 Carriage Bolt  
Kep Nut, 1/4-20  
Control Plate Assembly  
Slide Damper  
Spring  
1357M  
1557M  
1357M  
1557M  
#10 Flat Washer  
10-24 Kep Nut  
Knob, Slide Damper  
21  
22  
Ash Pan  
1
1
2
1
1
1
Baffle, Flue  
25197G Control Box Cover  
25199G Pull Handle  
23  
24  
25  
22761B Flue Collar Ring  
22762B Forced Draft Ring  
83895  
10-24 x 1-3/4 CS Machine Screw  
86402  
1-1/2" Pipe Plug  
N/S = Not Shown  
Color Code: G = Green  
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Optional Equiptment  
11DIKL Draft Inducer Kit w/ Limit Swich  
This optional kit allows your furnace to be thermostati-  
cally controlled and gives the option to change the on/off  
times of the distribution blower(s).  
UFB908 Universal Filter Box  
When installing ANY warm air furnace, proper installation  
is the key and required for getting the most efficiency and  
longest life out of your unit. Failure to install your furnace  
as outlined from the manufacturer, often will result in in-  
adequate heating and problems associated with drafting.  
U. S. Stove Co. offers the UFB908, a universal filter box  
that mounts to the rear of the unit that your return air duct  
work will attach to. It uses a standard 16 x 20 x 1 filter  
(NOT INCLUDED) to reduce the amount of dust particles  
from being transfered thru you duct work system.  
11DIKL  
DR-6 Barometric Damper Regulator  
In the unlikely event that your furnace “overfires” (a con-  
dition evidenced by elbows, stove pipes, and connectors  
glowing red in appearance or otherwise discoloring),  
then your installation is subject to excessive draft cre-  
ated by either a chimney too tall 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 over-firing and/or any hazardous consequences of  
potential overfiring.  
Barometric draft regulators are generally available where  
you purchased your stove or may be ordered directly  
from United States Stove Company at a nominal charge.  
UFB908  
DR-6  
21  
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Bulletin rc454  
A GUIDE TO BURNING COAL IN YOUR FURNACE  
Furnaces that are capable of burning coal usually  
sult, should be fired with the “conical method” - with  
the highest portion of your fire bed in the center of  
the firebox. The first flames will be long and gen-  
erally 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.  
will burn both Bituminous and Anthracite coal. An-  
thracite is perhaps the best coal fuel because of its  
long even burn time, high heat output, and clean-  
liness which make it a good choice for the home.  
However, keep in mind it is a much more difficult  
fuel to use, requires more care and patience, is not  
so widely available, and is usually much more ex-  
pensive than Bituminous.  
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, and turbulence created increases the burn  
efficiency. There will have to be some experiment-  
ing with the individual setup as no two chimney’s  
or installations are going to be the same. Just re-  
member to allow enough air to enter the firebox and  
keep the 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 care-  
ful not to mix the coal as this increases the chances  
of forming clinkers. When shaking the grate(s) be  
gentle. Just a few short movements - a couple of  
“cranks” - is better than a lot of agitation. The objec-  
tive is to remove a small amount of the ashes with-  
out 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(s) to very high temperatures which can cause  
warpage or burnout.  
SIZE OF COAL:  
Most sizes of Bituminous Coal will work in a coal  
furnace; for best results we recommend large “nut”  
coal to small “egg” coal (1-3/4” diameter to 4” diam-  
eter). When burning Anthracite, use “egg” or “bro-  
ken” with sizes between 2-5/16” thru 4-3/8”. Note  
that it is important to the long life of your stove to  
buy coal which has been sized and cleaned. Clean-  
ing insures removal of rocks and other minerals.  
Never use coal smaller than 1” or larger than 5” in  
diameter. Small sized coal will smother the fire. Too  
large a size of coal will not burn well.  
STOVE OPERATION:  
All coal fires should be started with wood which will  
allow the fire to get hot enough to ignite the coal.  
The best ignition fires utilize dry pine or other resin-  
ous soft woods as kindling, with hard wood (oak,  
hickory, ash) added to increase the heat prior to ad-  
dition of the coal.  
For overnight operation (long duration burn time)  
shake the fire and add coal, retaining the cen-  
ter cone. Once the volatiles are burned off, close  
the feed door and adjust the stove pipe damper, if  
epuipped. Then adjust the thermostat to the desired  
heat level.  
Before starting the fire, open the stove pipe damper  
(if epuipped), turn the thermostat to high, open the  
ash pit door and feed door, place newspaper and  
finely split kindling on the grate, light the paper, add  
larger hard wood after the kindling is burning bright-  
ly. CAUTION: Never use gasoline, lantern fuel, ker-  
osene, charcoal lighter fluid, or other flammable liq-  
uids to start or freshen up a fire in any heater. Place  
the larger pieces of wood on the fire so that they 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.  
More MAINTENANCE will be needed with bitumi-  
nous coal than with anthracite coal as more soot will  
collect on heating surfaces and in pipes, requiring  
more frequent cleaning.  
ANTHRACITE:  
Add a thin layer of coal (preferably smaller chunks)  
to the wood fire, being careful not to disturb it too  
much or cut off the draft. Then, add a second heavi-  
er 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 liner (not above!). Be sure to  
close the ash door.  
BURNING 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 re-  
22  
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Bulletin rc454  
a guide to Burning coal in your furnace  
Before adding further fuel, be sure to leave a red  
BANKING THE FIRE:  
spot of glowing coals in the center of the firebox to  
insure that the fire has not been smothered and to  
help ignite the gases given off by the new charge. A  
deep charge will give a more even heat and a lon-  
ger fire, but it may take one to two hours before the  
whole bed is fully ignited.  
For extended operation, such as overnight, the fire  
will need to be banked. 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. The  
intensity of the fire will also be reduced without let-  
ting it go out. Follow the same procedure as for refu-  
eling. 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.  
When the fire is well established and the room is  
becoming warm, partially close the dampers. Some  
experimenting will have to take place with each par-  
ticular setting of all dampers and controls as the  
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, one should  
be able to turn the secondary air supply below the  
feed door (some models) 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 there will be 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).  
To revive a coal fire that is almost out, (1) open the  
ash door and stove pipe damper and close the spin  
damper under the door to get a good draft through  
the grate. (2) place a thin layer of dry coal 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 lit-  
tle), refuel.  
DO NOT burn coke, charcoal, high volatile bitumi-  
nous coal, sub bituminous, lignite or cannel coal  
(sometimes called channel coal or candle coal).  
Only when the coal is burned down to half its origi-  
nal depth it is time to add fresh coal. When doing so,  
open the stove pipe damper and turn the 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 (or  
thermostat) open for a few minutes until the volatile  
gases have burned off. It is not necessary to shake  
down the ashes each time you refuel the furnace.  
Experience will be your best teacher.  
NEVER burn wax or chemically impregnated saw-  
dust logs - their intended use is for fireplaces only.  
NEVER fill the stove or furnace above the firebrick  
or cast iron liner.  
23  
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CENTRAL INSTALLATION  
ADD-ON INSTALLATION  
24  
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Appendix  
INSTALLATION A  
TO EXISTING  
DUCT WORK  
COLD AIR  
RETURN  
WARM AIR  
EXISTING FURNACE  
SOLID FUEL  
FURNACE  
FILTER BOX  
INSTALLATION B  
TO EXISTING  
DUCT WORK  
PLENUM  
COLLECTOR  
BOX  
WARM AIR  
COLD AIR  
RETURN  
EXISTING  
FURNACE  
SOLID FUEL  
FURNACE  
FILTER BOX  
INSTALLATION C  
TO EXISTING  
DUCT WORK  
COLD AIR  
RETURN  
WARM AIR  
PLENUM TOP  
(OPTIONAL)  
EXISTING  
FURNACE  
FILTER BOX  
SOLID FUEL  
FURNACE  
25  
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INSTALLATION D  
INSTALLATION E  
26  
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INSTALLATION F  
INSTALLATION G  
INSTALLATION H  
TOP VIEW  
FRONT VIEW  
27  
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How to order repair parts  
THis MAnuAL WiLL HeLp yOu OBTAin eFFiCienT, dependABLe serviCe FrOM  
yOur FurnACe, And enABLe yOu TO Order repAir pArTs COrreCTLy.  
Keep THis MAnuAL in A sAFe pLACe FOr FuTure reFerenCe.  
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 inFOr-  
MATiOn As sHOWn in THis LisT:  
1. THe pArT nuMBer  
2. THe pArT desCripTiOn  
3. THe MOdeL nuMBer: 1357M 1557M  
4. THe seriAL nuMBer:____________________  
united states stove Company  
A
227 industrial park road  
I
p.O. Box 151  
south pittsburg, Tn 37380  
S
C
U
S
(800) 750-2723  
WWW.ussTOve.COM  
P
28  
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