United States Stove | 1600EF | Operator`s manual | United States Stove 1600EF Operator`s manual

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Installation/Operator’s Manual
Model: 1600EF
Wood or Coal External Furnace
SAFETY NOTICE:
If this furnace is not properly installed, a house fire may result! For your safety, follow these installation
instructions. Contact local building or fire officials about restrictions and installation requirements in your
area. This furnace must be installed by a qualified technician. Keep these instructions for future reference.
Safety Tested to UL 391
United States Stove Company • 227 Industrial Park Road, P.O. Box 151 • South Pittsburg, TN 37380 • www.usstove.com
USSC
851846 rev 0
1
UNIT DIMENSIONS
29-1/2”
2-9/16”
55-5/8”
5-3/16”
45-3/4”
65-1/2”
D-RINGS FOR GUY WIRE
ATTACHMENT
Blower Speed
Selector Switch
6” FLUE GAS OUTLET
17-5/16”
24-1/4”
29-3/16”
43-7/16”
14-1/4”
Limit Switch
Access
10” HOT AIR OUTLET
12” COLD AIR RETURN
HOT WATER COIL ACCESS
(OPTIONAL)
6”
31-5/8”
USSC
2
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WARRANTY INFORMATION CARD
Name__________________________________________ Telephone #: (_____)_____________
City____________________________________________ State_______ Zip_________________
Email Address __________________________________________________________________
Model # of Unit________________________________ Serial #___________________________
Fuel Type: qWood qCoal qPellet qGas
qOther _________________________
Place of Purchase (Retailer)______________________________________________________
City____________________________________________ State_______ Zip_________________
If internet purchase, please list website address___________________________________
Date of Purchase _______________________________________________________________
Reason for Purchase:
qAlternative Heat
qDecoration
qCost
qMain Heat Source
qOther _________________________
What was the determining factor for purchasing your new USSC appliance?_______
I have read the owner’s manual that accompanies this unit and fully understand the:
Installation qOperation q and Maintenance q of my new USSC appliance.
Print Name
Signature
Date
Please attach a copy of your purchase receipt.
Warranty not valid without a Proof of Purchase.
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Warranty information must be received within 30 days of original purchase.
Detach this page from this manual, fold in half with this page to the inside and tape
together. Apply a stamp and mail to the address provided. You may use an envelope if you choose.
You may register online by going to www.usstove.com
All information submitted will be kept strictly confidential. Information provided will not be sold for advertising purposes.
Contact information will be used solely for the purpose of product notifications.
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United States Stove Company
P.O. Box 151
South Pittsburg, TN 37380
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INTRODUCTION
GENERAL INFORMATION
Thank You for your purchase of a U.S. Stove Wood/Coal
Burning External Furnace. Your decision to buy our Clayton Furnace was undoubtedly reached after much careful thought and consideration. We are very proud you
chose this furnace and trust you will receive the comfort
and economy that others realize when heating with a U.S.
Stove product.
Your 1600EF furnace comes ready for installation. No assembly required. Unpack your furnace and insure that
there is no shipping damage. If damage exist, please
contact your dealer immediately. Review the items included with your furnace located inside the firebox.
Your dealer is important in your experience with the furnace not only with the purchase, but for recommendations for professional installation for your home. The
qualified professional installer has been expertly trained
in solid-fuel furnace installation to assure the safety and
comfort for your family while saving you money. Trust your
experienced installer. They are specialist in this field.
IMPORTANT
Before installing and using your furnace, please read the
following pages thoroughly and carefully. If you follow the
instructions, your furnace will give you safe and more dependable service for years to come.
• Check your local codes. This installation must
comply with their rulings.
• This is an outdoor hot air furnace and must NOT
be installed inside the home or a building.
• This furnace must be connected to a 110 volt
Ground Fault Circuit Interrupter (GFCI) outlet suitable for outdoor use.
• A back-up generator, 2,000 watts minimum, is
recommended in case of a power failure.
• Always have a properly functioning smoke or
ionization detector and a CO detector installed
in your home.
• To prevent injury or damage, do not allow anyone who is unfamiliar with the furnace to operate
it.
• Spend adequate time with your furnace to become well acquainted with the different settings
and how each will affect its burning patterns. It
is impossible to state just how each setting will
affect your furnace because of the variations in
each installation.
DISCLAIMER NOTICE
The BTU ranges and heating capacity specifications are
provided as a guide and in no way guarantee the output
or capacity of this unit. The actual BTU output depends
on the type of fuel being burned and its conditions, the
thermostat setting, the draft adjustment and the chimney
to which the unit is attached. The actual area that this
unit will heat depends on factors such as the conditions
of the building, heat loss, type of construction, amount of
insulation, type of air movement, the location of the unit
and more importantly the duct work and return air facility.
Warning:
Do not alter this appliance in any way other than specified in these instructions. Doing so may void your warranty.
USSC
1 - 10” Starter Collar
1 - 12” Starter Collar for Cold Air Return
8 - #10 x 3/4 Screws w/ Sealing Washer
1 - Literature Package
This furnace may be installed as a Stand-Alone Central
Furnace or as a Supplementary Furnace. If installed as a
Central Furnace, this unit will have it’s own central ducting
system and will essentially be your primary heat source.
If installed as a Supplementary Furnace, the 1600EF will
assist an Electric, Gas or Oil Fired Furnace in heating your
home by utilizing the existing furnace’s duct work system.
The 1600EF must not be wired in conjunction with the existing furnace. The outdoor furnace may be operated with
the supplied wall thermostat or a 24 volt thermostat that
you supply yourself.
The furnace should be placed outdoors on a level noncombustible base, preferably a 4’ x 8’ concrete pad, as
close to the home as clearances to combustibles will allow. If locating the furnace more than 10 feet away from
the home, a minimum of 6 feet of Class “A” HT 2100 All
Fuel 6 inch chimney pipe is required - Do not place the
furnace more than 40 feet away from the home. Maintain
all clearances stated in this manual.
Class “A” HT 2100 All Fuel 6” Chimney Pipe is recommended for optimum performance and can be purchased
from your local dealer. A Chimney Base Plate should
be installed over the flue outlet and sealed to maintain
weather resistance. A 2” clearance to combustibles must
be maintained from the pipe. We suggest using either
Simpson Dura-Vent or Metal Fab chimney products for
your installation.
If you choose to use single wall stainless, the flue temperatures will be reduced which promotes the formation of
creosote, possibly creating a fire hazard. If you use single
wall stainless pipe, the minimum clearance to combustibles is 20”.
Attach the appropriate chimney pipe lengths to the chosen chimney base plate and finish with a rain cap. Secure
the chimney with guy wires to each of the four anchors
point on the furnace. Your furnace requires it’s own chimney system and can not share a flue with another appliance.
Once you have selected a location for the furnace and
connected your furnace to a chimney and a 110 volt GFCI
outlet, you will need to commence an initial firing. DO NOT
connect the furnace to your duct work at this time. Your
new furnace has a protective coating of oil and paint on
the surface which could produce smoke or odors during
the initial firing and will burn off. Build a small fire - DO NOT
fill the firebox to it’s full capacity for the initial burn. This
initial firing allows the metals and castings to cure.
After completing the firing and allowing it to cool, you are
ready to finish the installation. Refer to the remainder of
this manual for detailed instructions.
5
WOOD SUPPLY
FLUE PIPE INSTALLATION
Some important rules for preparing good firewood are: Cut,
split and stack the wood in the early spring and let it stand
in the sun and wind all summer.
Clearances to combustible materials will vary with the type
of flue connection used. Be sure to maintain the specified
clearances for your type of installation.
TYPE OF FLUE REQUIRED
CONNECTION CLEARANCE
Whether you purchase your wood or cut it yourself, spring
is the best time to buy or cut your wood to insure it is good
and dry come winter. If you live in a damper climate, it will
take longer for the wood to season.
By far the most important characteristic of any firewood
is its moisture content. Firewood with a moisture content
higher than twenty percent will burn, but it will be hard to
light and keep burning, will make a lot of smoke and will
produce less efficient fires with lower sustained BTU output.
Plus much of its energy content will be wasted right up the
chimney. Firewood should be between 15 and 25 percent
moisture to burn properly and to get that dry it must be split
and stacked in the open for at least a full summer.
All wood burns, but wood that’s cut green (between 50
and more than 100 percent moisture content) burns with
more difficulty, because the water in the wood must be
boiled off before the actual wood fiber can burn. Air-dried
(“seasoned”) wood is generally between 20-30 percent.
Kiln-dried firewood generally contains less than 20 percent
moisture.
Green wood can produce more creosote--a black sooty
liquid which deposits and hardens on the inside of your
chimney and can ignite, causing a chimney fire.
When you stack your wood, you should stack it in an open
location where the summer sun can warm it and breezes
can help remove moisture. Be sure to cover the top of the
wood pile to keep the rain out. It is important that you do
not stack unseasoned wood in an unventilated area for
it will not dry properly. You shouldn’t allow your firewood
to lay on the ground for more than a couple days before
stacking , or it will start to mold and rot quickly.
Once your wood is seasoned, store it in a dry location
before burning.
CLEARANCES
Class A 103HT All-Fuel or Equivalent . ....2”
Double Wall, Stainless Steel or................6”
Double Wall, Black Pipe w/
Stainless Steel Inner wall
24 Gauge or Heavier ..............................20”
Single Wall Stainless Steel
or Black Pipe
The above clearances to combustibles must be
maintained.
CHIMNEY REQUIREMENTS
A Class “A” HT 2100 All Fuel 6” Chimney Pipe and Base Plate
should be used for the installation. See Illustration. Place
the Base Plate over the flue outlet of the furnace and drill
eight(8) pilot holes into the Cabinet Top. Apply a generous
amount of high temperature sealant to the bottom of the
base plate, and around the flue outlet. Position the base
plate over the flue and secure with the eight(8) screws
provided. Then attach the flue pipe sections.
A minimum chimney height of 6 feet is required not including
the rain cap. In order to determine proper chimney height
above the roof, measure from the side of the chimney horizontally. As you move up the chimney, the length increases.
Once this measurement reaches 10 feet, this is the base
height of the chimney. The chimney must be 2 feet taller
than the base height. If the chimney is closer than 10 feet
from the peak of the roof, the chimney must be 2 feet taller
than the peak of the roof. The 2 feet measurement does
not include the rain cap.
Once correct chimney height is achieved, check the
chimney draft. It should not exceed 0.06 inches of water
column. Then secure with three screws at each joint and
attach guy wires down to the rings located around the top
of the furnace cabinet.
See illustration.
COMBUSTIBLE WALL
COMBUSTIBLE WALL
20”
15”
(TOP VIEW)
22”
FLUE
MINIMUM CLEARANCES
TO A COMBUSTIBLE
WALL
CAUTION:
12”
DO NOT store
combustible or
flammable materials or
liquids near the
furnace.
Sides of furnace, 12”; Rear of furnace, 15” (allow approximately 20” for the return box); Front of furnace, 36”; Heat
Duct, 2” for the first 9 feet then 1” thereafter.
6
USSC
CONNECTING HOT AIR DUCT
TO FURNACE
We strongly recommend that the hot air duct work be
installed by a home heating specialist. If doing the installation yourself, before you decide which installation will
best suit your needs, consult a qualified heating technician
and follow his recommendations as to the safest and most
efficient method of installation.
The warm-air supply-duct system shall be constructed of
metal in accordance with NFPA 90B, 2-1.1. The plenums
installed to the furnace be constructed of metal in accordance with NFPA 90B, 2-1.3.
Outside the house you must use 10 inch galvanized pipe,
wrapped with weather proof, UV resistant insulation. The
12 inch return may be galvanized pipe and attached to
the home so as to not pressurize the home.
NEVER reduce the 10” hot air or the 12” return air as this
will result in restricted air flow and cause the furnace to not
operate properly.
NEVER draw cold outside air into the blower housing. By
doing so, the furnace’s heat chamber will not reach the
necessary temperature to heat the home.
The duct work should be designed so the external static
pressure does not exceed 0.2 inches water column while
developing air velocities of 600 to 1,000 feet per minute
in the main trunk duct and 400 to 600 feet per minute at
the registers. The heat outlet should never be less than ten
inches (10”) round or 79 square inches.
This furnace must be installed with a cold air return system.
The system must be a minimum of twelve inches (12”) to
readily transfer the cold air from the home back to the
furnace. If desired, a cold air filter box may be constructed
with a minimum opening of 225 square inches.
The warm-air supply outlet of the outdoor furnace must
not be connected to the cold-air-return inlet of an existing
central furnace because the possibility exist of components
of the existing furnace overheating and may cause the
central furnace to operate other than intended.
TYPES OF INSTALLATION
NO DUCT WORK INSTALLATION
Cold air return must be installed in all installations, even those without an air duct system. If you do not, the furnace will
not be able to heat the home. A filter should be installed in the cold air return. Furnace filters should be checked and
cleaned/replaced regularly.
When there is no duct system to connect the furnace to, keep the following in mind:
1. You must separate the hot air duct from the cold air
return. Ideally, locate each at opposite ends of the
home. This method will work well in homes that are built
on concrete slabs and should create a good air flow. If
you do not, air will not flow evenly through the home.
USSC
2. In homes with a basement, you may run the hot air
duct to the basement and pull the cold air return from
the main floor. This will create the perfect air flow since
hot air rises.
7
TYPES OF INSTALLATION continued...
CENTRAL DUCT CONNECTION
When connecting to a central duct system, avoid 90 degree elbows as this will reduce air flow delivery. A duct run
in excess of 40 feet is NOT RECOMMENDED. The air flow
and heat output will be greatly decreased.
INSTALLATION #2
The baffle on this system should be made the full width of
the furnace plenum in order to properly direct the air into
the distribution ducts.
Run 10” insulated hot air duct from the outdoor furnace
through a wall or window of the structure. Then attach a
flexible hot air duct to the existing duct work. Connect the
duct with a 45 degree elbow or at an angle so the hot air
from the outdoor furnace is delivered downstream. This
will insure proper air flow into the system.
Avoid delivering hot air through an air conditioning coil as
this will cause an obstruction reducing heat output.
The following illustrations may be used as examples for
your installation.
INSTALLATION EXAMPLES
INSTALLATION #1
With this installation, a back draft damper (optional) is inserted into the heat run before the plenum of the existing
furnace to prevent air from the existing furnace to blow
back into the furnace when it is not in use. When a back
damper is employed, it should be located as close to the
existing furnace plenum as practical.
8
INSTALLATION #3
Extending the hot air duct from the furnace into the existing
plenum will help direct the flow of air from the furnace as
well as the flow in the existing furnace. Ducting entering
the existing plenum at an angle (approximately 45 degrees)
will facilitate air flow from the furnace while diverting air
from the existing furnace.
USSC
FURNACE ASSEMBLY INSTRUCTIONS
Read and follow these instructions in the event you have
SHAKER GRATE HANDLE
to replace or re-assemble components of your furnace.
DOOR HANDLES
Insert door handle into door. From rear side of door, place
a 1/2” washer over the threaded part of the handle, then
attach the lock nut. Tighten the nut, then back off 1/4
turn to allow free operation of the handle.
Follow these same directions for the ash door handle assembly.
Insert the Shaker Rod into the hole on the ash door frame
as shown. Then attach the Shaker Bracket to the front of
the furnace using two 1/4-20 x 3/4” Hex Bolts and two 1/420 Lock Nuts. Next, insert the shaker Rod into the bracket
and attach to the shaker grate bar using the 1/4-20 x 1”
Hex Bolt and a 1/4-20 Lock Nut. The bolt and nut retaining
the shaker bar and rod should be left loose to allow free
movement of the grates.
(1) Shaker Rod
(1) Shaker Bracket
(1) 1/4-20 x 1” Hex Bolt
(2) 1/4-20 x 3/4” Hex Bolt
(3) 1/4-20 Lock Nut
(2) Door Handle
(2) 1/2” Washer
(2) 1/2” Lock Nut
BRACKET
ASH DOOR SPIN DRAFT
Screw the spin draft onto the 3/8” x 2-1/2” carriage bolt.
Then screw the spin draft and bolt into the ash door allowing approximately 1/2” of the bolt to stick through the
back side of the ash door. Secure the bolt in place with
the 3/8”-16 lock nut.
(1) Spin Draft
(1) 3/8-16 Carriage Bolt
(1) 3/8-16 Lock Nut
FUEL & ASH DOOR LATCH
With two 1/4-20 x 3/4 hex bolts each, attach the door
latches to the door latch mounting brackets on the left
side of the door frames as illustrated. The slots in the brackets and latches are for door seal adjustment. Make the
proper adjustments, then tighten the nuts. The door’s gasket should be snug against the door frame on the furnace.
SMOKE CURTAIN
Using two 1/4-20 x 1-1/4” Carriage bolts, the smoke curtain clips and two nuts, attach the smoke curtain in place
above the Fuel Feed Door as shown below. After installation, the smoke curtain should swing freely back into the
furnace.
(1) Smoke Curtain
(2) 1/4-20 x 1-1/4 Carriage Bolt
(1) Feed Door Latch
(1) Ash Door Latch
(4) 1/4-20 x 3/4 Hex Bolt
(4) 1/4-20 Kep Nut
Feed Door
Illustration
Ash Door
Illustration
(2) Smoke Curtain Clips
(2) 1/4-20 Kep Nut
1/4-20 NUT
SMOKE CURTAIN
CLIP
1/4-20 x 1-1/4
CARRIAGE BOLT
SMOKE CURTAIN
NUT
BOLT
SMOKE CURTAIN
CLIP
SMOKE CURTAIN
FRONT
USSC
9
DISTRIBUTION BLOWER & ACC.
A
All electrical connections should be done by a
qualified electrician.
1.
To replace the Honeywell Limit Control (A): Unplug from
power supply
The control may be removable thru the access panel on item
“B”. However it may be easier to remove item “B” entirely for better access. Remove item “B” by means of the eight(8) screws. If
siliconed, use a utility knife to score the silicone along the edges
of the part. Take off the cover of the control (A), remove the
three wires, and continue to remove the control by means of the
two screws retaining it. Use the wiring diagram in the rear of this
manual to re-connect the new control. Reattach item “B” and
re-silicone all the seams with weather resistant silicone.
2.
B
C
To remove the return air box (D): Unplug from power supply.
If siliconed, use a utility knife to score the silicone along the edges
of the part. Remove item “B” as described above. Then remove
the four(4) screws down each side and the four(4) across the top
of the return air box. Pull the box back away from the unit enough
that you can reach in to remove the snap-in plug (C) from the
top of the box. The power supply cord will need to be feed back
thru the plug in the bottom of the air box for complete removal.
When re-attaching, make sure that the three plugs in the top of
the Fan Center (G) are properly plugged in. Do not forget to put
the snap-in plug (C) back in place. Re-silicone all the seams with
weather resistant silicone.
3.
E
D
To remove the Distribution Blower (E): Unplug from power
supply.
Remove items”B” and “D” as described above. Unplug the blower from the top of the Fan Center (G). Remove the four(4) screws
retaining the blower.
4.
C
To remove the Blower Motor: Unplug from power supply.
F
H
G
Perform number 3 above. Before removing the motor from the
housing, measure two things:
1.) The distance from the edge of the motor to the edge of the
motor bracket. Record (d1) _________________
2.) The distance of the shaft remaining outside the coupling on
the blower wheel. Record (d2) __________________
d1
These two measurements dictate the position of the blower inside the housing and is critical in determining motor longevity.
Repositioning of the blower motor, bracket, and wheel in respect
to one another should keep as close to the factory position as
possible.
K
I
Remove the three(3) screws (I) from the blower housing. Then
loosen the bolt (J) on the motor shaft. Next, loosen or remove the
bolt (K) in the motor bracket to remove the motor.
5.
To remove the Blower Capacitor (F): Unplug from power supply.
This may be accomplished by working thru the 12 inch diameter
return duct hole in the Return Box. Otherwise, you must remove
items”B” and “D” as described above. Unplug the blower from
the top of the Fan Center (G). Using pliers with rubber coated
handles, unplug the two connections on the capacitor. Remove
the two screws and cap bracket.
d2
J
10
USSC
MOTORIZED NATURAL DRAFT REPLACEMENT
1. Make certain the unit has been unplugged from the
power source. Remove the cover from the motor and
remove the two wire nuts and grounding screw. With a
pair of pliers, remove the strain relief and cord assembly from the motor.
2. Remove the draft assembly from the furnace by loosening the two bolts retaining draw band.
4. If replacing the Flipper, remove the two #8 screws retaining the plate to the tube.
If motor comes with the cord, the above step is not
required. However, you will have to remove the panel
on the inner cabinet side to rewire the motor. Do so by
removing the rivets with a 3/16” drill bit. Screws may be
used to replace the rivets.
3. To remove the motor from the tubing assembly, simply
loosen the set screw in the collar on the motor and slide
it off the tube.
Reverse the above steps for re-assembly
(1) Draft Actuator
(1) Spin Draft
(1) 3/8-16 Carriage Bolt
(1) 3/8-16 Lock Nut
(1) Flipper Tube
(1) Flipper
(2) #8 Screw
FIREBRICK AND BAFFLE REPLACEMENT
FIREBOX BRICK REPLACEMENT
BAFFLE/BRICK REPLACEMENT
This furnace comes from the factory with the firebrick installed. However, if brick replacement is necessary, follow
these instructions. Before furnace operation, remove the
brick retaining strip. This piece is used during shipping to
reduce brick damage.
If baffle replacement is necessary, slide the baffle out until
you can access the nuts thru the flue outlet. Once the
nuts have been removed, slide the baffle off the rod and
thru the opening in the firebrick. You may have to remove
one of the firebrick to make baffle removal easier.
There are 6 full brick and 1 half brick per side. Install the
half brick first by putting the bottom of the brick in first and
let it rest against the firebox side and fire grates. Then slide
it to the rear. After that, install the #2, #3, #4, #5 & #6 brick,
sliding the 6th brick forward to allow for the 7th brick. Repeat for opposite side.
There are 4 full brick and 1 half brick in the top of the furnace. Install the brick by inserting one end of the brick angled upward and then allowing the opposite end to rest
on the firebox lip. Lay the brick between the spacer and
firebox back. Slide the baffle to the rear and let it rest on
that half brick. After installing brick #2 in the front, install #3
and slide it under the baffle. Finally install bricks #4 and #5.
NOTE: Prior to operation, be sure to remove the brick
retaining strips.
USSC
11
TESTING AND OPERATING PROCEDURES
4. Load the furnace, close the load door and push the slide
GENERAL FURNACE OPERATION
After installation of the furnace is complete, it is ready for
operation. The Honeywell Limit Control, in conjunction
with a wall thermostat, operates the distribution blowers
and the motorized draft on the front of the furnace. The
limit control is located on the rear of the furnace in the
upper left corner and is accessible by removing the two
screws in the cover plate. DO NOT operate your furnace
with this plate removed! The control can be adjusted to
your desired blower On/Off times. The factory settings are
100/150/200.
The wall thermostat setting operates the ON time of the
motorized draft. If the temperature is below the setting on
the wall thermostat, the motorized draft will come open.
(Recommended setting at 5 to 10 degrees higher than
other heating thermostats.)
The first two set points on the limit control operates the
distribution blower. When the furnace plenum reaches
the second set point on the limit control, the distribution
blower will come on. If the temperature falls to the first
set point, the distribution blower will shut-off. The distribution blower is a three speed blower and can be manually
adjusted by means of the three position switch located
behind the sliding access panel on the cold air return box.
When the furnace reaches the third set point on the limit
control, the draft blower will shut-off. The draft blower will
come back on if the temperature falls below the setting
on the wall thermostat.
TESTING
1. Check the motorized draft by turning the room thermostat up high enough so that the motorized draft opens.
Then lower the thermostat setting to ensure it closes off.
2. Use a sheet of newspaper to test your draft by placing
it inside the furnace and lighting it.
With completion of the tests above, you are ready to light
the furnace. Follow the operating steps.
STARTING A WOOD FIRE
Using Motorized Natural Draft
CAUTION: Never use gasoline, gasoline-type lantern fuel,
kerosene, charcoal lighter fluid, or similar liquids to start or
“freshen up” a fire in the furnace. Keep all such liquids well
away from the furnace while it is in use.
1. Open spin draft cap on ash door.
2. Pull the slide baffle rod to the front position.
3. Open the fuel load door and light fire using kindling and
several sheets of newspaper, then close the furnace door.
The furnace door should remain closed for 5 to 10 minutes
in order to establish the fire. If the fire has established, you
are ready to load the furnace.
CAUTION: To prevent flame and smoke spillage, the slide
baffle must be pulled out and the fuel door must be cracked
for ten seconds before being fully opened.
Do not over fire your furnace! After you have become
familiar with its operating, you should know how much
wood to use.
12
Baffle rod to rear.
5. Close the spin draft cap on ash door, leaving it cracked
about the diameter of a dime.
6. The motorized draft cycles (opened & closed) on demand
from the wall thermostat. Setting the U.S. Stove thermostat four degrees higher than your existing thermostat is
recommended. In operation, the power draft will remain
open until the U.S. Stove thermostat temperature setting is
reached. Then it will close to reduce combustion air. If the
furnace looses power, the draft will automatically close.
CAUTION: To avoid excessive temperatures, do not operate with fuel door or ash pan open.
STARTING A COAL FIRE
Shut off FAD when fuel door is open
 Open all draft controls on your furnace. Pull the slide
baffle forward.
 Place about 10-15 lb. of coal in on the shaker grates. It
should come up to about half of the first firebrick level.
 Place crumpled paper over the coal and crisscross a
couple handfuls of dry kindling wood 3/4” in thickness
on top of paper.
 Ignite the paper and close loading door. Wait about 30
minutes until coal fire is established before adding more
coal. NOTE: NEVER load coal over the level of firebrick.
 Close by-pass damper and set all draft controls to your
own needs. It may take 3 to 4 coal fires to determine
how your local coal and the Clayton Furnace reacts
together. Adjusts drafts accordingly.
 When loading with a good bed of coals in the morning
- Open by-pass damper.
1. In normal shaking, only rock the grates a small amount
to sift ash through. Do not agitate the fire bed too
often. This practice will waste coal. If glowing coal is
visible in the ash pan, you have shaken to much.
2. Remove all ashes every day from ash pit.
CAUTION: Ashes should be placed in a metal container with
a tight fitting lid. The closed container of ashes should be
placed on a non-combustible floor or on the ground well
away from all combustible materials pending final disposal.
If the ashes are disposed of by burial in soil or otherwise
locally dispersed, they should be retained in the closed
container until all coals have thoroughly cooled.
3. With your poker, push hot burning embers to the rear
of the unit and add green coal in front. NEVER load
over height of firebrick. This can result in damage to
your furnace and home.
4. Close by-pass damper.
 Too much draft air will cause clinkering of coal and will
waste heat up the chimney. Shut draft down to as low
a point as you can and still heat your home.
1. NOTE: Never stand in front of loading door when
opening it. Stand to the side.
2. NEVER completely cover the live fire with fresh coal.
Always leave a generous area of glowing coal at the
top of the fire and at the rear.
3. Always keep the ash pit clean.
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 If the fire goes out or does not hold overnight, look for:
1. Poor draft.
2. Incorrect damper settings.
3. Improper firing methods for coal being used.
4. More combustion air needed.
5. Coal not sized to the furnace. We recommend 1” to
3” diameter pieces of coal.
6. Ashes, if allowed to accumulate in the ash pit, will
not allow the passage of required air for combustion.
Keep ash pit clean.
7. This furnace is not to be used with an automatic stoker
unless so certified.
 There are ONLY two types of coal allowed for use in this
furnace: Bituminous Coal (soft coal) and Anthracite
Coal (hard coal). NEVER USE Cannel (or Channel) coal
or Brown (Lignite) Coal.
 See our Bulletin RC454 at the rear of this manual for the
best information available on burning coal.
OPERATING NOTES
 DANGER: Risk of Fire or Explosion - Do not burn garbage,
plastics, gasoline, drain oil or other flammable liquids.
Plastics, when burned, form hydrofluoric and hydrochloric
acids which will damage and destroy your furnace pipe
and chimney. The burning of trash or oil can result in an
extremely hot fire and is sometimes a cause of chimney
fires. NEVER BURN GREEN WOOD OR TIRES.
 WARNING: Risk of Fire - Do not operate with flue draft
exceeding .06 inches of water column and must be set
with a draft gauge to maintain a steady draft. (Barometric
Damper recommended.)
 Do not operate with the fuel loading or ash removal
doors open.
 Do not store fuel or other combustible material within
marked installation clearances.
 Inspect and clean your flues and chimney regularly.
CAUTION: Hot Surfaces - Keep children away. Do not
touch during operation. Maximum draft marked on
nameplate.
 Equip your home with fire extinguishers and smoke detectors appropriately located.
 Wood should be placed directly onto the cast iron shaker
grate of the Clayton furnace. Do not use additional
grates and/or irons.
 Do not allow ashes to build up higher than 2” above
grates.
 Never allow the ashes in the ash pan to touch the grate
section. REMOVE ASHES FREQUENTLY!
 Be extremely careful when removing furnace ash pan;
it can get very hot.
 With new steel, there is a small amount of oil or dirt on
the metal. You may smell an odor. This is normal during
the first operation. You may want to build a small fire in
the furnace to “burn off” this dirt and oil before installing
the duct work.
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 The furnace is designed to burn air dried wood and coal
at a predetermined firing rate. Over firing could result
in damage to the heat exchanger and cause dangerous operation. Over firing occurs when the ash door is
left open during operation or a highly volatile fuel, i.e.
large amounts of small kindling, is used. If any portion of
the connector pipe glows orange or red, you are in an
over-firing situation. Close all dampers.
 When tending the firebox always pull the baffle slide rod
out prior to opening load door. Open load door slowly
to avoid a “flash back”. After closing load door, push
the baffle slide rod to the rear.
 In event of chimney fire, shut all draft controls and call
your fire department immediately. Alert everyone in the
house. If the fire is still burning vigorously, throw baking
soda into firebox or discharge a fire extinguisher into the
firebox. After chimney fire is over, completely inspect
system for damage before further use.
NEVER throw water on the fire or at the furnace, as rapidly
expanding steam could result in a severe scalding.
Slow fires: It is not recommended burning the Clayton
furnace any more than necessary early in the fall and
late spring, as you cannot keep the firebox hot enough
(without overheating your home) to burn gases. Slow
fires can cause excessive creosote build-up in smoke
pipe, chimney and firebox.
 Inspect air filters regularly. The air filter should be changed
at least every 30 days.
Oil motors every 90 days with a few drops of 30 wt. oil.
 Check the fit on the load door. It must fit tightly. If it does
not, check for deterioration or wear of the ceramic rope
seal. Replace defective seals.
In the event of a power failure, the furnace will not distribute heat to the home. We recommend the use of a
back-up generator, 2,000 watts minimum, for continued
use until regular power is restored
NOTE: For further information on using your furnace safely,
obtain a copy of the National Fire Protection Association
publication “Using Coal and Wood Stoves Safely.” NFPA
NO. NW-8-1974. The address of the NFPA is 470 Atlantic
Ave., Boston, Massachusetts 02210.
THIS IS A WOOD AND COAL BURNING FURNACE AND SHOULD NOT BE
ALTERED IN ANY WAY! DOING SO
WILL VOID YOUR WARRANTY!
CREOSOTE - FORMATION AND NEED
FOR REMOVAL
When wood is burned slowly, it produces tar and other
organic vapors, which combine with expelled 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.
The chimney should be inspected at least twice monthly
during the heating season to determine if a creosote buildup has occurred. If creosote has accumulated, it should
be removed to reduce the risk of a chimney fire.
13
TROUBLE SHOOTING AND PROBLEM SOLVING
1. Problem:
4. Problem:
Smoke puffs from furnace
Distribution blower vibrating
Solution:
Solution:
A. Check chimney draft. Check for blocked chimney
or flue pipe. Use mirror to check chimney clearance.
A. Tighten blower wheel to motor shaft.
B. Check for bad fan bearings.
B. Check ash pit — if it is too full, empty.
5. Problem:
C. Make sure all of chimney mortar connections are
airtight.
Distribution blower continues to run or will not run
D. Check ash drawer. Make sure it’s airtight.
E. Check chimney for possible down-draft caused
by taller surrounding trees or objects. Correct with
proper chimney vent cap.
F. Check the possibility of a cold chimney forcing cool
gases backward. Remedied by properly insulating
chimney with non-combustible liner — non-combustible insulation.
G. Fuel may be too green.
H. Make sure no other fuel burning devices are connected to the chimney impairing the draft.
I. Check chimney draft, it should be .06 inches of
water column. This service is provided by a certified
chimney sweep.
2. Problem:
Inadequate heat being delivered to your home
Solution:
A. Check home insulation — is it adequate?
B. Check hook-up to furnace — is it installed correctly?
C. Cool air inlet may be inadequate.
D. Your wood fuel may be too low grade. Hardwoods
are recommended.
E. Make sure your hot air duct (and other duct work)
is airtight.
F. Is air to the blower available?
3. Problem:
Excess smoke or flames coming out door when refueling
Solution:
A. Wait 15 seconds and open door SLOWLY — then
refuel.
B. Check length of flue pipe to chimney.
C. Make sure chimney cap is not too close to the top
of the chimney.
Solution:
A. Check fan limit or heat sensor and cable.
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.
6. Problem:
Motorized draft stays open or will not close
Solution:
A. Check wiring.
B. Check thermostat or thermostat wire for short.
C. Make sure temperature is calling for heat.
7. Problem:
Odor from first fire
Solution:
A. The odor from new steel should disappear in a few
hours.
B. If the odor remains, call you dealer immediately. A
bad weld can cause a fume leak.
8. Problem:
Excessive Creosote
Solution:
A. Check the grade of wood you are burning.
B. Make sure your unit is serviced by its own proper
chimney.
C. Check length of flue pipe and its connections.
D. Make sure you are burning the smallest, hottest fire
to adequately heat your home.
E. Also see Solutions to Problem number 1.
9. Problem:
If the fire goes out or does not hold over night
Solution:
D. Check chimney draft — make sure chimney flue
pipe is clean and chimney is of adequate height.
A. Poor Draft.
E. Make sure you’re not suffocating the fire with excessive amounts of unburned wood.
C. Improper firing methods if burning coal.
F. Slide baffle should be pulled out prior to load door
opening.
E. Coal not sized to the furnace. We recommend 1”
to 3” diameter pieces of coal.
B. Incorrect damper settings.
D. More combustion air needed.
F. Ashes, if allowed to accumulate in the ash pit, will
not allow passage of the required air for combustion.
Keep ash pit clean.
G. This furnace is not to be used with an automatic
stoker unless so certified.
14
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WIRING DIAGRAM
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15
PARTS DIAGRAM
16
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PARTS DIAGRAM AND LIST
Key
Description
Part #
Qty
Key
Description
Part #
Qty
1
Grate Retainer
40312
2
41
Inner Top
25726
1
2
Shaker Bar
891341
1
42
Insulation, Top-Front
88150
1
3
Shaker Grate Section
40314
5
43
Insulation, Top-Middle
88151
1
4
Front Liner
40344
1
44
Insulation, Top-Rear
88152
1
5
Back Liner
40313
1
45
Mount, Flue Outlet
25727
1
6
Full Firebrick (4-1/2 wide x 9 tall x 1-1/4 thick)
89066
16
46
Weldment, Cabinet Top
69648
1
7
Half Firebrick (2-1/4 wide x 9 tall x 1-1/4 thick)
891414
3
47
D-Ring Clip
83912
4
8
Slide Baffle
24231
1
48
Bottom Intake
25722
1
9
Baffle Rod
86662
1
49
Assembly, Cabinet Door
69649
1
10
Inside Cover Plate
24220
1
50
Latch, Cabinet Door
891865
1
11
Gasket, Water Coil Cover
C97999
1
51
1800 CFM Blower Assembly
80590
1
12
#12 x 3/4: Tek Screw
C23799
3
N/S
1/4-20 x 3/4 Self Tapping Screw
83236
4
13
Carriage Bolt, 1/4-20 x 1-1/4 Long
83445
2
N/S
Washer
83045
4
14
Smoke Door Clip
23787
2
52
Blower Motor
80588
1
15
Kep Nut, 1/4-20
83250
2
53
Fan Center Assembly
69651
1
16
Smoke Curtain
23800
1
54
Honeywell Limit Control
80145
1
17
Door Handle
891884
2
55
Harness, 3 Circuit Plug
80586
1
N/S
Lock Nut, 1/2-13
83444
2
56
7/8” Snap Bushing-Heyco (BLK)
83909
3
N/S
Washer
83835
2
57
Cable Chase
25732
1
18
Feed Door Latch
23786
1
58
Gasket, Access Panel
88155
1
19
Feed Door Assy. (w/Rope Gasket)
69653
1
59
Probe Access Panel
25733
1
20
Shaker Handle
69005
1
60
Cover, Water Coil
25725
1
21
Bracket, Shaker Handle
24204
1
61
Bottom, Blower Box
25734
1
22
Ash Door Latch
23823
1
62
1-1/4” Bushing, Heyco
83910
1
23
Ash Pan
68882
1
63
Right Side, Blower Box
25737
1
24
Carry Handle
24233
1
64
Left Side Assy., Blower Box
69650
1
25
Ash Door Assy. (w/Rope Gasket)
68880
1
65
Back, Blower Box
25736
1
26
Draft Cap
23859
2
66
Top, Blower Box
25735
1
27
Outer Side Wall, Left
25715
1
67
MTG. Bracket, Blower Box
25741
2
28
Panel-L, inner Cabinet
25746
1
68
Motorized Natural Draft (MND) Assembly
69654
1
29
Clip, Outer Wall
25718
2
N/S
MND Motor
80592
1
30
Bracket, Alignment
25719
2
69
3” Draw Band
23888
1
31
Cabinet Door Stop
25720
1
70
1/4-20 x 1” Hex Bolt
83379
2
32
Insulation, Cabinet Side
88149
4
71
1/4-20 Lock Nut
83261
2
33
Outer Side Wall, Right
25715
1
72
Plate, Electrical Connection
25745
1
34
Panel-R, inner Cabinet
25717
1
73
Strain Relief Bushing
80154
1
35
Harness, 2 Circuit Plug
80587
1
74
Hook, Handle
25748
1
36
Filler, Top
25721
1
75
Handle, Separable
891884
1
37
Hood, Front
25744
1
76
12” Stub Collar
89799
1
38
Assembly, Cabinet Back
69647
1
77
10” Stub Collar
891868
1
39
Insulation, Back
88153
1
N/S
83572
96
40
Insulation Holder
83884
16
#10 x 3/4 Tek Screw w/ Bonded Neoprene
Washer
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N/S = Not Shown
17
PARTS DIAGRAMS AND LISTS - MOTORIZED DRAFT KIT
4
Key
18
Description
Part #
Qty
1
Weldment, Draft Tube
68872
1
2
Spin Draft
40379
1
3
3/8-16 x 2-1/2 Carriage Bolt
83503
1
4
Lock Nut, 3/8-16
83274
1
5
Actuator, Motorized Draft
80592
1
6
Tube, Flipper
23899
1
7
Flipper
23898
1
8
#8 x 1/2 Tek Screw, Hex Head
83455
2
9
Strain Relief
80154
1
10
Power Supply Cord
80593
17 in.
11
Male, Tyco Terminal
80382
2
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PARTS DIAGRAMS AND LISTS - FAN CENTER CONTROL
Key
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Description
Part #
Qty
1
Electrical Box Cover
25742
1
2
Electrical Box Body
25743
1
3
Switch, 3-Position
80361
1
4
Harness, 6 Circuit Receptacle
80583
1
5
Harness, 3 Circuit Receptacle
80584
1
6
Harness, 2 Circuit Receptacle
80585
1
7
Transformer, Fan Center
80130
1
8
Strain Relief
80154
1
9
Power Supply Cord
80232
1
10
#10 x 1/2 Sheet Metal Screw
83172Z
13
11
Washer, Internal tooth, #10
83240
1
19
NOTES
20
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DOMESTIC HOT WATER COIL KIT - OPTIONAL
This Furnace will accept the installation of a Domestic Hot
Water Coil Kit. The U.S. Stove kit is a 1124 Water Coil and it
may be purchased from your local dealer.
2
1. Remove the access panel on the rear of the furnace
enclosure.
2. With a utility knife, cut away a section of the insulation
directly behind the access panel.
1
3. Remove the cover plate from the rear of the furnace
firebox.
ACCESS
PANEL
4. Place one nut on each end of the water coil and
thread each nut up to the end of the threads on the
coil.
5. Insert the coil through the holes from the inside of the
firebox. Install a gasket, washer and nut onto each end
of the water coil. Tighten the nuts down securely to insure an air tight seal.
3
The installation is now ready to be plumbed to your existing hot water system. Choose one of the three methods
described in the Hot Water Coil instructions.
6. Remove knockouts from the access panel and re-attach
to the furnace enclosure.
REAR WALL OF
FIREBOX
5
Have a qualified plumber connect your domestic hot water
pipe to the coil with the appropriate fittings.
4
DOMESTIC HOT WATER
COIL
1. NUT
2. WASHER
3. GASKET
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TURN INSIDE NUTS UP
TO END OF THREADS
6
21
BULLETIN RC454
A GUIDE TO BURNING COAL IN YOUR FURNACE
Furnaces that are capable of burning coal usually
will burn both Bituminous and Anthracite coal. Anthracite is perhaps the best coal fuel because of its
long even burn time, high heat output, and cleanliness 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 expensive than Bituminous.
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” diameter). When burning Anthracite, use “egg” or
“broken” 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.
Cleaning 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 resinous
soft woods as kindling, with hard wood (oak, hickory, ash) added to increase the heat prior to addition
of the coal.
Before starting the fire, open the stove pipe damper (if equipped), 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
brightly. CAUTION: Never use gasoline, lantern fuel,
kerosene, charcoal lighter fluid, or other flammable
liquids 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.
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,
and turbulence created increases the burn efficiency. There will have to be some experimenting with
the individual setup as no two chimney’s or installations are going to be the same. Just remember 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 careful 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 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(s) to
very high temperatures which can cause warpage
or burnout.
For overnight operation (long duration burn time)
shake the fire and add coal, retaining the center
cone. Once the volatiles are burned off, close the
feed door and adjust the stove pipe damper, if
equipped. Then adjust the thermostat to the desired
heat level.
More MAINTENANCE will be needed with bituminous
coal than with anthracite coal as more soot will
collect on heating surfaces and in pipes, requiring
more frequent cleaning.
ANTHRACITE:
BURNING BITUMINOUS:
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
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 liner (not above!). Be sure
to close the ash door.
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 fire bed in the center of
the firebox. The first flames will be long and generally
Before adding further fuel, be sure to leave a red
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
longer fire, but it may take one to two hours before
the whole bed is fully ignited.
22
USSC
BULLETIN RC454
A GUIDE TO BURNING COAL IN YOUR FURNACE
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
particular 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).
Only when the coal is burned down to half its original 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.
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BANKING THE FIRE:
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
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, (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 little), refuel.
DO NOT burn coke, charcoal, high volatile bituminous coal, sub bituminous, lignite or cannel coal
(sometimes called channel coal or candle coal).
NEVER burn wax or chemically impregnated sawdust logs - their intended use is for fireplaces only.
NEVER fill the stove or furnace above the firebrick or
cast iron liner.
23
HOW TO ORDER REPAIR PARTS
This manual will help you obtain efficient, dependable service from the furnace, and enable you to order repair parts correctly.
Keep this manual in a safe place for future reference.
When placing an order or for warranty claims, please provide the following
information found on the Certification Plate located inside the cabinet door.
PART NUMBER
PART DESCRIPTION
MODEL NUMBER______________
SERIAL NUMBER______________
United States Stove Company
227 Industrial Park Road
P.O. Box 151
South Pittsburg, TN 37380
(423) 837-2100
Customer Service: (800)-750-2723 • Repair Parts: (888) 299-1440
24
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