Breckwell SF747 Administrator Guide

1
852000
Model: SF747
Wood or Coal Gravity Style (Up-Flow) Supplemental Furnace
United States Stove Company • 227 Industrial Park Road, P.O. Box 151 • South Pittsburg, TN 37380 • www.Breckwell.com
SAFETY NOTICE:
If this furnace is not properly installed, a house re may result! For your safety, follow these installation instructions. Contact
local building or re ocials about restrictions and installation requirements in your area. is furnace must be installed by a
qualied technician. Keep these instructions for future reference.
Installation/Operator’s Manual
Safety Tested to UL 391
Exceptional Heat, Outstanding Value
®
BRECKWELL

2

3
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 qMain Heat Source
qDecoration qCost qOther _________________________
What was the determining factor for purchasing your new appliance?_____________
I have read the owner’s manual that accompanies this unit and fully understand the:
Installation q Operation q and Maintenance q of my new appliance.
Print Name Signature Date
Please attach a copy of your purchase receipt.
Warranty not valid without a Proof of Purchase.
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 condential. Information provided will not be sold for advertising purposes.
Contact information will be used solely for the purpose of product notications.
"CUT HERE "CUT HERE

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Fold Here Fold Here
United States Stove Company
P.O. Box 151
South Pittsburg, TN 37380
Fold Here
PLACE
STAMP
HERE
"CUT HERE "CUT HERE

5
INTRODUCTION
ank You for your purchase of a U.S. Stove Wood/Coal Burning
Gravity Style (Up-Flow) Furnace. Your decision to buy our furnace
was undoubtedly reached aer much careful thought and consider-
ation. We are very proud you chose this furnace and trust you will re-
ceive the comfort and economy that others realize when heating with
a U.S. Stove product.
Your dealer is important in your experience with the furnace not only
with the purchase, but for recommendations for professional instal-
lation in your home. e qualied professional installer has been ex-
pertly trained in solid-fuel furnace installation to assure the safety and
comfort for your family while saving you money. Trust your experi-
enced installer. He is a specialist in this eld.
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.
• First step: Check your local codes. is installation must comply
with their rulings.
• Do Not install this furnace in a mobile home or trailer
• Always have a smoke or ionization detector and a CO detector
installed in your home.
• To prevent injury or damage, do not allow anyone who is unfa-
miliar with the furnace to operate it.
• is furnace must be installed ONLY in the prescribed manner
shown in illustrations 1, 2, or 3 under the Installation Examples
in this manual. It is NEVER to be installed as a counter-ow or
down-dra furnace, or in any manner wherein the heated air is
directed in a downward ow into the home or toward to an exist-
ing central furnace.
• NEVER INSTALL outside the home.
• Spend adequate time with your furnace to become well acquaint-
ed with the dierent settings and how each will aect its burning
patterns. It is impossible to state just how each setting will aect
your furnace because of the variations in each installation.
DISCLAIMER NOTICE
e BTU ranges and heating capacity specications are provided as a
guide and in no way guarantee the output or capacity of this unit. e
actual BTU output depends on the type of fuel being burned and its
conditions, the thermostat setting, the dra adjustment and the chim-
ney to which the unit is attached. e 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 re-
turn air facility.
Warning:
Do not alter this appliance in any way other than specied in these
instructions. Doing so may void your warranty.
LOCATING YOUR FURNACE
e furnace is to be installed maintaining the clearances specied in
the following illustrations.
CLEARANCES
REDUCED CLEARANCES
NFPA guidelines and most codes permit reduced clearances to com-
bustible walls and ceilings if adequate protection is added. A common
mistake is to assume that sheet metal, masonry, or millboard placed
directly against a wall protects it. Materials installed in this manner
actually provides very little protection. ese materials are good heat
conductors, so they will be almost as hot on their back side as they are
on the exposed side. erefore, the combustible wall behind is still a
re hazard.
A wall can be kept cool using these items but only if they are mounted
and spaced out from the wall by an inch or two to allow free air cir-
culation behind the protective panel. e protective panel should also
have a gap between the oor and ceiling.
ree rules to follow when constructing wall protectors:
1. Non-combustibility of all materials including mounting and
supporting.
2. A well ventilated air space between protector and wall.
3. Sucient strength and rigidity so that the protector and air
space will be durable.
PROTECTIVE COVERING
AND ALL SUPPORTS MUST
BE NON-COMBUSTIBLE
CONSTRUCTING
NON-COMBUSTIBLE
WALLS
2 in [5cm]
FROM FLOOR
2 in. [5cm]
FROM CEILING
1 in [2.5cm]
AIR SPACE
Do not place the furnace directly on a combustible oor. If you are
placing it on a combustible oor, an approved re retardant material,
equivalent to 3/8” UL Listed millboard, should be placed under the
unit. e material must extend at least 16 inches beyond the front of
the unit and 8 inches on either side of the fuel loading door opening. It
must also extend underneath the chimney connector and to each side
of the connector by at least 2 inches.
22”
12”
20” 15”
COMBUSTIBLE WALL
COMBUSTIBLE WALL
FLUE
(TOP VIEW)
MINIMUM CLEARANCES
TO A COMBUSTIBLE
WALL
CAUTION:
DO NOT store
combustible or
flammable materials or
liquids near the
furnace.

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CHIMNEY REQUIREMENTS
A reclay lined masonry or Class A 103HT All-Fuel Metal Insulated
Chimney must be used in all airtight wood furnace installations. e
minimum recommended ue size for the model AAF747 is 6 inches,
inside diameter. When making new chimney installations, always fol-
low the chimney manufacturer’s instructions.
If at all possible, use the factory built, class A 103HT chimney men-
tioned above. ey are safer and perform better than traditional ma-
sonry chimneys. If a masonry chimney is a must, be certain it has a
re clay liner and that it is intact, clean and recently inspected. And
remember, masonry chimneys are far more prone to the formation of
hazardous creosote.
1. e furnace should be the only heating using the chimney ue
. One furnace per ue outlet.
TOP OF CHIMNEY MUST BE
2 FEET [61cm] ABOVE
HIGHEST POINT OF THE
ROOF WITHIN 10 FEET
[305cm].
2 FT [61cm]
MINIMUM 3 FT [91cm]
MINIMUM
RECOMMENDED
MINIMUM HEIGHT
20 FT [610cm]
MINIMUM 3 FT[91cm] FROM
TOP OF CHIMNEY TO
POINT AT WHICH IT
PASSES THROUGH THE
ROOF.
2. A masonry chimney should have a tile or stainless steel liner.
3. e masonry chimney should not have any missing mortar or
loose bricks.
4. ere should be no mortar or parts of the chimney blocking the
chimney ue.
5. ere should be a two inch clearance between any chimney (ma-
sonry or metal) and combustibles. (such as the house)
6. e chimney should extend at least 2 foot above the highest point
of the house, or 2 foot above the point at which the chimney is 10
foot from the roof.
7. e chimney should be relatively straight and vertical.
8. e portion of an all-fuel metal chimney that extends above the
roof should be well secured.
9. A masonry chimney should be built on footings and not attached
to the house.
10. A rain cap, complete with an animal or bird screen, should be in-
stalled on top of the chimney.
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. e creosote
vapors condense in the relatively cool chimney ue of a slow-burning
re. As a result, creosote residue accumulates on the ue lining. When
ignited, this creosote makes an extremely hot re.
e chimney connector and chimney should be inspected at least twice
monthly during the heating season to determine if a creosote build-up
has occurred. If creosote has accumulated, it should be removed to
reduce the risk of a chimney re.
SMOKE PIPE INSTALLATION
Clearances to combustible materials (i.e. paneling, ceiling tile, sheet rock,
plaster, draperies, casements or wood trim, etc.) will vary with the type
of ue connection used. Be sure to maintain the specied clearances
for your type of installation.
TYPE OF FLUE REQUIRED
CONNECTION CLEARANCE
24 Gauge or Heavier .................................................. 18”
Single Wall Stainless Steel
or Black Pipe
Double Wall, Stainless Steel or .................................. 6”
Double Wall, Black Pipe w/
Stainless Steel Inner wall
Class A 103HT All-Fuel or Equivalent ................... 2”
According to NFPA standards, single wall stove pipes can be within
9” of combustibles provided an approved re retardant material cov-
ered with 28 gauge sheet metal, spaced out 1” on non-combustible
spacers, is utilized. See illustration.
18” [46cm] 18” [46cm]
9” [23cm]
When using a Class A or double wall ue pipe connection, follow the
manufacturer’s instructions.
When constructing a single wall smoke pipe, the following guidelines
must be observed.
1. The connector pipe should be 24 gauge or heavier stainless
steel or black pipe.
2. Secure all joints with three #8 screws.
3. If the connector pipe must pass through a wall, an approved insu-
lated or ventilated thimble, at least three times the diameter of the
smoke pipe must be used. (i.e. a 6” diameter smoke pipe needs an
18” thimble).
4. e connector pipe should never be used as a chimney.

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DAMPERS ON STOVE PIPES
When burning coal, we recommend a Barometric Dra Damper be
installed at a safe convenient place between chimney and your furnace
preferably less than 3’ from the ue collar.
When you have installed the connector pipe between your furnace
and the chimney, tap the pipe hard with your ngernail. Remember
the sound it makes - it will be a “ting” echoing inside the stove pipe. If
later you tap and hear a mued thud, you are building up soot in the
pipe and should clean it. is pipe should be cleaned at least once or
twice during the heating season.
DO NOT CONNECT TWO HEATERS TO THE SAME CHIMNEY
FLUE. e National Fire Prevention Association recommends that wood
burning appliances vent into a separate ue from gas or oil furnaces. If
such an installation is contemplated, rst check with a local building
inspector to nd out if a separate ue for a wood burner is required.
Use of a Barometric Dra Control (when burning wood) is recommended
ONLY in the event your chimney creates excessive dra leading to an
over-ring condition.
HEATED AIR DISCHARGE
e furnace is designed for use as a supplemental heating source. When
used as a supplementary furnace, it is connected in conjunction with an
oil, gas, or electric furnace to the existing duct work which distributes
the heated air into several rooms and/or areas.
ough United States Stove Company expressly Does Not recommend
CONNECTING HOT AIR DUCT
TO FURNACE
when installed with existing oil or gas furnaces.
INSTALLATION EXAMPLES
INSTALLATION #1
With this installation, a back dra 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.
IMPORTANT INFORMATION FOR ALL
CONNECTOR PIPES
e connector pipe must be constructed and installed so that it main-
tains clearances, keeps condensation and creosote within the pipe, and
is capable of withstanding a 2100°F degree chimney re.
1. e connector pipe should slant down toward the furnace a mini-
mum of 1/4” to the foot. At no time should the pipe turn downward
toward the chimney or run horizontal.
2. ere should be no more than two 90 degree elbows.
3. e connector pipe should never be longer than six feet. If it is
absolutely necessary to make a run of more than six feet (not
recommended) use extra support brackets every 3 feet.
4. e connector pipe should never be reduced to a smaller size than
ue opening on the furnace.
5. e connector pipe should not block the ue of the chimney or
extend into it in any way.
6. A good airtight thimble should be used to hold the connector pipe
in the chimney. It should be constructed so the connector pipe can
be removed for cleaning.
7. e connector pipe should not leave the heated portion of the
building to reach the chimney.
8. e connector pipe should not pass from one story to the next
before entering the chimney, nor should it pass through any closed
or enclosed space.
9. e connector pipe and any elbows must be of 24 gauge or greater.
10. e connector pipe should not be located near or in a walk way or
well traveled area.
11. All male ends of connector pipe should run or point towards the
furnace.
12. Install a cast iron adjustable damper in the rst joint of the con-
nector pipe, nearest to the ue collar.
the use of its furnaces to be installed and/or used as a free-standing
heater, it is possible to achieve a reasonably safe and functional instal-
lation IF certain standard procedures are followed. e following are
guidelines only and are intended to enable the furnace user to obtain
reasonable eciency from his furnace, and with due respect to safety
when installing as a “free-standing heater”. If installed correctly, and
in accordance with the instructions found in this manual, your warm
air furnace may be installed as a “space heater” within living quarters,
cabins, garage, or workshop. Please adhere to the following:
1. e use of a cold air return and/or lter box is mandatory. is will
not only increase your blower life and provide ltered air, it will
also help prevent the blower or blowers from “capturing” heated air
exiting from the top of the furnace heat outlets.
2. If installed as purchased , without directing the heat away from the
furnace itself, it will simply sit and cycle, turning the blowers o and
on. e thermostat may not function properly.
3. All larger furnaces (or those with multi-speed blowers) absolutely
require BACK PRESSURE to prevent premature motor winding
failure. If allowed to operate at high RPM (As in “FREE AIR” mode
- no duct work or ow restrictions) the windings overheat, insulation
melts and the motor simply burns up - not covered under warranty.
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 qualied
heating technician and follow his recommendations as to the safest and
most ecient method of installation.
e following illustrations are the ONLY acceptable congurations

8
INSTALLATION #3
e bae on this system should be made the full width of the furnace
plenum in order to properly direct the air into the distribution ducts.
INSTALLATION #2
Extending the hot air duct from the furnace into the existing plenum
will help direct the ow of air from the furnace as well as the ow in
the existing furnace. Ducting entering the existing plenum at an angle
(approximately 45 degrees) will facilitate air ow from the furnace while
diverting air from the existing furnace.
THE PLENUM OPENINGS DIFFER
BETWEEN THE 1602 AND 1802
MODEL 1602 - 13” x 18” Rectangular
MODEL 1802 - 18” x 18” Rectangular
RETURN AIR IS VERY IMPORTANT
When installing your furnace, return air MUST BE incorporated into
the system. Return air can be provided by installing a separate duct
system or by tying into the cold air return of an existing gas or oil
furnace. e cold air return duct can be connected to the furnace with
either a factory manufactured lter box, model UFB908 or an equiva-
lent fabricated from sheet metal.
When installing a cold air return, the minimum size shall be a 16” x
20” or equivalent (320 sq. in.) in order to insure proper furnace per-
formance. Failure to provide return air ducts of the specied size will
void your warranty.
A lter should be installed in the cold air return. Furnace lters should
be checked and cleaned/replaced regularly.
If return air is not provided, the warm air distributed into your home
will be restricted and the eciency of the furnace is decreased. With-
out a return air system, warm air will be drawn into your basement,
unnecessarily heating unused areas of the home. In extreme cases, if
your basement or utility room is fairly airtight, the blowers on the fur-
nace could depressurize the room and pull toxic ue gases from the
furnace, a gas water heater, or gas furnace. e fumes could then be
distributed throughout the house.
COMBUSTION AIR
All res need air (specically oxygen) to burn. Furnaces, replaces,
and wood burning furnaces need enough oxygen for complete com-
bustion of their fuels. e incomplete combustion that takes place
when a furnace is “air starved” causes carbon monoxide (CO) to be
formed in quantities that can be dangerous inside a well sealed house.
Having a source of combustion air from outside the home will prevent
“air starvation” of the furnace. A simple positive air supply can be con-
structed using dryer vent and a modied termination.
NEGATIVE
PRESSURE IN
BASEMENT
PLENUM OPENING
13” x 18” Rectangular

9
FURNACE ASSEMBLY INSTRUCTIONS
Unpack your Furnace and insure that there is no shipping damage. If
damage exists, please contact your dealer immediately.
Your furnace will require some assembly before operation. All needed
hardware and components for the following assemblies are included
within the parts boxes inside the furnace and in the ash pan. Read and
follow these instructions for proper furnace assembly.
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 o 1/4 turn to allow free operation of the
handle.
Follow these same directions for the ash door handle assembly.
(2) Door Handle
(2) 1/2” Washer
(2) 1/2” Lock Nut
ASH DOOR SPIN DRAFT
Screw the spin dra onto the 3/8” x 2-1/2” carriage bolt. en screw
the spin dra 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 Dra
(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 le side of the door frames as il-
lustrated. e slots in the brackets and latches are for door seal adjust-
ment. Make the proper adjustments, then tighten the nuts. e door’s
gasket should be snug against the door frame on the furnace.
Feed Door
Illustration
Ash Door
Illustration
(1) Feed Door Latch
(1) Ash Door Latch
(4) 1/4-20 x 3/4 Hex Bolt
(4) 1/4-20 Kep Nut
SHAKER GRATE HANDLE
BRACKET
Insert the Shaker Rod into the hole on the ash door frame as shown.
en attach the Shaker Bracket to the front of the furnace using two
1/4-20 x 3/4” Hex Bolts and two 1/4-20 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. e bolt and nut re-
taining the shaker bar and rod should be le loose to allow free move-
ment 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
SMOKE CURTAIN
FRONT
SMOKE CURTAIN
SMOKE CURTAIN
CLIP
NUT
BOLT
1/4-20 NUT
SMOKE CURTAIN
CLIP
1/4-20 x 1-1/4
CARRIAGE BOLT
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. Aer installation, the smoke curtain should swing
freely back into the furnace.
(1) Smoke Curtain (2) Smoke Curtain Clips
(2) 1/4-20 x 1-1/4 Carriage Bolt (2) 1/4-20 Kep Nut

10
SPRING HANDLES
Attach the four(4) spring handles to the Feed/Ash Doors, Bae Rod,
and Shaker Rod by twisting the springs counter-clockwise while ap-
plying pressure until you have screwed them approximately 3/4”-1”
onto the rods.
(4) Spring Handles
DISTRIBUTION BLOWER & ACC.
(2) 800 CFM Blower
(2) Gasket, Blower
(8) Tinnerman Clip, 1/4-20
(8) 1/4-20 x 3/4 Bolt
(2) Conduit Assembly (5)
(1) Honeywell Limit Control
(1) Conduit Assembly (1)
(1) Junction Box
(1) Insulation (5” x 5”)
(1) Rocker Switch
(1) Romex Cable Clamp
(1) Fan Center Control
(3) 73B Wire Nut
(1) 74B Wire Nut
(1) Female Term. (blue)
(1) Female Term. (red)
(8) #10 x 1/2 Screw
1. Remove all contents and insure that all components are present for as-
sembly. See the part list below
2. Begin by attaching the blowers to the unit. Insert a clip into each mount-
ing hole in the furnace’s cabinet back. Be sure to install the gasket be-
tween the blower and cabinet back. Insert the eight bolts provided and
tighten.
3. Mount the Honeywell limit control to the cabinet back. e conduit as-
sembly should already be attached to the limit control, otherwise, do so
then make the correct wiring connections to the limit control. See wiring
diagram.
4. Next, mount the junction box and insulation using two of the #10 x 1/2
screws provided. Make a small slice in the 5 x 5 insulation to allow the
wires from the dra blower to protrude, then Install it between the cabi-
net back and junction box, with the foil side to the cabinet back. Attach
the conduit assembly from the limit control to the junction box as shown.
5. If not already installed, snap the rocker switch into the top of the junction
box. Provide a 110 volt power supply and connect to the junction box
with the cable clamp to the right side.
6. Attach the two longer conduit assemblies to the junction box and to each
blower.
7. Before mounting the Fan Center, make all the wire connections per the
wiring diagram, then attach the fan center to the junction box.
All electrical connections should be done by a qualied elec-
trician.
NOTE: e extra brown wire on the fan center has no use. It
should be capped o or removed.
e conduit may be cut shorter to provide a cleaner installation.
WIRING DIAGRAM