United States Stove Company 1800 User Manual
UNITED STATES
STOVE COMPANY
Keeping America Warm Since 1869
MODEL: 1600 / 1800
THE WOOD AND COAL FURNACE
SAFETY NOTICE: IF THIS FURNACE IS NOT PROPERLY INSTALLED, A HOUSE FIRE
MAY RESULT. FOR YOUR SAFETY, FOLLOW THE INSTALLATION DIRECTIONS.
CONTACT LOCAL BUILDING OR FIRE OFFICIALS ABOUT RESTRICTIONS AND
INSTALLATION REQUIREMENTS IN YOUR AREA.
Installation/Operator's Manual #851062E
TABLE OF CONTENTS
Introduction ..........................................................................1
Locating Your Furnace.........................................................1
Clearances ...........................................................................1
Chimney Requirements.....................................................1-2
Smoke Pipe Installation.....................................................2-3
Dampers on Stove Pipes......................................................3
Installation Examples ........................................................3-4
Assembly Instructions .......................................................5-8
Electrical installation.............................................................9
Draft Wiring Diagram..........................................................10
Testing and Operating Procedures.................................11-12
Trouble Shooting and Problem Solving.............................13
Parts Lists
Model 1600/1800 .....................................................14-16
Motorized Natural Draft................................................17
Forced Air Draft............................................................18
Optional Electronic Control System
Installation....................................................................19
Parts List Model 1600 ..................................................19
Wiring Diagrams.......................................................20-23
Installation of Optional Equipment
Domestic Hot Water Coil..............................................24
Back Draft Damper ......................................................25
Filter Boxes..............................................................26-27
TC
INTRODUCTION
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‰
chimney connector and extending at least 2" on either side of
the chimney connector.
Thank you for your purchase of a U.S. Stove Woodburning
furnace. Your decision to buy a Hotblast Furnace was
undoubtedly reached after much careful thought and consideration. We are very proud you chose the U.S. Stove furnace
and trust you will receive 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 in your purchase, but in his recommendations
for professional installation in your home. The qualified
professional installer (as recommended by your dealer) 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. He is a specialist in
his field.
IMPORTANT
Before installing and using your Hotblast Furnace, please
read the following pages thoroughly and carefully. If you
follow the instructions, your Hotblast furnace will give you safe
and more dependable service in the years to come.
✑First step; check your local codes. This installation must
comply with their rulings.
✒ Do not install this furnace in a mobile home
or trailer.
✓ Always have a smoke or ionization detector installed in
your home.
4 To prevent injury or damage, do not allow anyone who is
unfamiliar with the furnace to operate it.
✕ Spend some time with your furnace to become well
acquainted with 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 only and in no way guarantee the output
or capacity of the units. The actual BTU output depends on the
type of fuel being burned and its conditions, the thermostat
setting, the draft adjustment and the chimney that the unit is
hooked up to. The actual area that the 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, and the location of the unit.
CLEARANCES
FLAMMABLE WALL
MODEL 1600 - 20"
MODEL 1800 - 25"
MODEL
1600 - 22"
1800 - 19"
MODEL
1600 - 12"
1800 - 8"
FLUE
REDUCED CLEARANCES
NFPA guidelines and most codes permit reduced clearances
to combustible walls and ceilings if adequate protection is
added. A common mistake is to assume that sheet metal,
masonry, or asbestos board placed directly against a wall
protects it. Materials installed in this manner give very little
protection. These materials are good heat conductors, so they
will be almost as hot on their back side as they are on the
exposed side. Therefore, the combustible wall behind is still a
fire hazard.
A wall can be kept cool using these items but only if they're
mounted and spaced out from the wall by an inch or two to
allow free circulation of room air behind the protective panel.
The protective panel should start within a few inches of floor
level.
The three rules to follow when constructing wall protectors:
1. Non-combustibility of all materials including mounting
or supporting.
2.A well ventilated air space between protector or wall.
3.Sufficient strength and rigidity so that the protector and
2" FROM CEILING
air space will be durable.
CONSTRUCTING
NON-FLAMMABLE
WALLS
MODEL 1600 - 15"
MODEL 1800 - 18"
(TOP VIEW)
MINIMUM
CLEARANCE TO
FLAMMABLE WALLS
CAUTION: Do not
store combustible or
flammable material
near furnace.
PROTECTIVE COVERING
AND ALL SUPPORTS MUST
BE NON-COMBUSTIBLE.
LOCA TING YOUR FURNACE
The furnace is to be installed maintaining clearances as
shown in illustration.
Do not place the furnace directly on a combustible floor.
If you're placing it on a combustible floor, an approved fire
retardant material equivalent to 3/8" asbestos millboard
should be placed under the furnace. The material must extend
at least 16" in front of and 8" on either side of the fuel-loading
an d ash-removal doors, and underneath the
1" AIR SPACE
2" FROM FLOOR
CHIMNEY REQUIREMENTS
A masonry or Class A All-Fuel Metal Insulated Chimney must
be used in all airtight wood furnace installations. The minimum recommended flue size for the U.S. Stove Hotblast
Furnace is 6" (inside diameter) for round flues, and 7" x 7" for
square flues. When making new chimney installations,
1
always follow the chimney manufacturers instructions.
NOTE: Type of chimney: Class A All-Fuel also referred to as
Low-Heat appliance type chimney per Uniform Mechanical
Code:
Chimney, low-heat appliance type is a factory built,
masonry or metal chimney suitable for removing the
products of combustion from fuel-burning low-heat
appliances producing combustion gases not
in excess of 1000°F under normal operating
conditions but capable of producing combustion
gases of 1400°F during intermittent
forced firing for periods up to one hour. All
temperatures are measured at the appliance flue outlet.
TOP OF CHIMNEY MUST BE
2 FT. ABOVE HIGHEST
POINT OF ROOF
2 FT.
MINIMUMS
MINIMAL 3 FT.
FROM TOP OF
CHIMNEY TO POINT
AT WHICH IT PASSES
THROUGH THE ROOF.
CAP SHOULD HELP
PREVENT DOWNDRAFT
WHILE STILL PROVIDING
ADEQUATE EXHAUST.
3 FT.
MINIMUM
RECOMMENDED
MINIMAL
20 FT. HEIGHT
highest point of the house, or 2'
above the point at which the chimney
is 10' from the roof.
7.The chimney should be relatively straight and vertical.
8.The 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 installed 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. 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 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 fire.
SMOKE PIPE INSTALLATION
CHIMNEY FLUE
SHOULD BE
CONSTANT DIAMETER
THROUGHOUT ITS
ENTIRE HEIGHT.
APPROVED
CHIMNEY
CLEANOUT DOOR
SHOULD HAVE
AIRTIGHT FIT. DO
NOT LEAVE OPEN
WHEN FURNACE IS
IN OPERATION.
CHIMNEY THIMBLE SHOULD BE
CONSTRUCTED OF FIRE CLAY, AND
SHOULD FIT TIGHTLY TO FLUE PIPE.
CHIMNEY FLUE
MUST BE AS
LARGE OR
LARGER THAN
FURNACE FLUE
PIPE
1.The wood furnace should be the only heating appliance
using a chimney flue. One furnace per flue.
2.A masonry chimney should have a tile or stainless steel
liner.
3.The masonry chimney should not have any missing
mortar or loose bricks.
4.There should be no mortar or parts of the chimney
blocking the chimney flue.
5.There should be a two inch clearance between any
chimney (masonry or metal) and combustibles (such
as the house).
6.The chimney should extend at least 2' above the
Clearances to combustible materials (i.e. paneling, ceiling tile,
sheet rock, plaster, draperies, casements or wood trim, etc.)
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
24 Gauge or Heavier 18"
Single Wall Stainless Steel
COMBUSTIBLES
SMOKE PIPE
or Black Pipe
Double Wall Stainless Steel 6" Model 1600
8" Model 1800
Class A All-Fuel or Equivalent 2"
According to NFPA standards, single wall stove pipes can be
within 9" of combustibles provided an approved fire retardant
material covered with 28 gauge sheet metal, spaced out 1" on
CEILING OR WALL
18"
9"
18"
non-combustible spacers, is utilized. See illustration.
2
When using a Class A or double wall flue pipe connection,
follow the manufacturer's instructions.
When constructing a single wall smoke pipe, the following
guidelines must be observed.
1.The smoke pipe should be 24 gauge or heavier
stainl ess steel or black pipe.
2.Secure all joints with three #8 screws.
3.If the smoke pipe must pass through a wall, an ap-
proved insulated 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.The smoke pipe should not be used as a chimney.
IMPORTANT INFORMATION FOR
ALL SMOKE PIPES
The smoke pipe must be constructed and installed so that it
maintains clearances, keeps condensation and creosote
within the pipe, and is capable of withstanding a two to three
thousand degree chimney fire.
1.The smoke pipe should slant down toward the furnace a
minimum of 1/4" to the foot. At no time should the pipe
turn downward toward the chimney or run horizontal.
2.There should be no more than two 90 degree elbows.
3.The smoke 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.The smoke pipe should never be reduced to a smaller
size than flue opening on the furnace.
5.The smoke pipe should not block the flue of the
chimney or extend into it in any
way.
6.A good airtight thimble should be used to hold the
smoke pipe in the chimney. It
should be constructed so the smoke
pipe can be removed for cleaning.
7.The smoke pipe should not leave the heated portion of
the building to reach the chimney.
8.The smoke 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.Heat reclaimers should not be installed or used in the
smoke pipe.
10. The smoke pipe should not be located near or in a walk
way or well traveled area.
11. All male ends of smoke pipe should run or point
towards the furnace.
heating season.
DO NOT CONNECT TWO HEATERS TO THE SAME CHIM-
NEY FLUE. The National Fire Prevention Association recommends that woodburning appliances vent into a separate
chimney from gas or oil furnaces. If such an installation is
contemplated, first check with a local building inspector to find
out if a separate flue for a woodburner is required.
If codes allow, use extreme care in making such installations.
Be sure that one pipe is higher than the other so that the two
openings will not be opposite each other. Also, when connecting two heaters into the same chimney flue, the flue size
should be large enough to handle both heaters. Very few
codes and standards allow same flue connection. Such
installations can cause severe problems. Gas hoods and
barometric dampers allow excess air into the chimney
causing cooling of the flue gases and a greater creosote
build-up potential. If the same flue connections are used,
chimneys must be inspected more frequently and the chimney
should be cleaned any time the creosote deposits exceed 1/4"
thickness. A creosote fire in such a chimney can burn out of
control because of the air leak through the barometric damper
or gas hood. Keeping the chimney clean and burning wellseasoned wood is absolutely necessary. This type of installation does require more frequent inspection and maintenance.
HEATED AIR DISCHARGE
The Hotblast furnace is designed for use as a supplemental
heating source. When used as a supplementary furnace, the
1600/1800 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.
When used as a space heater, heated air from the 1600/1800
furnace is expelled directly into the room in which the furnace
is located. In installations of this type, the flow of heated air
from the furnace must not be blocked. It is recommended that
an elbow be attached to the heated air discharge to divert the
heated air away from combustibles. All other criteria for
installation remains unchanged.
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 following illustrations are the only acceptable configura-
tions when installed with existing oil or gas furnaces.
INSTALLATION EXAMPLES
DAMPERS ON STOVE PIPES
When burning coal, we recommend a Barometric Draft
Damper be installed at a safe convenient place between
chimney and your furnace.
When you have installed the smoke pipe connecting your
furnace to the chimney, tap the pipe hard with your fingernail.
Remember the sound it makes - it will be a "ting" echoing
inside the stove pipe. If later you tap and hear a muffled thud,
you are building up soot in the pipe and should clean it. This
pipe should be cleaned at least once or twice during the
3
BACK
DRAFT
DAMPER
HOTBLAST
FURNACE
EXISTING
FURNACE
INSTALLATION NO.1
With this installation, a back draft damper 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 draft damper is employed,
it should be located as close to the existing furnace plenum as
practical.
INSTALLATION NO. 2
Extending the hot air duct from the furnace into the existing
plenum will help direct the flow of air from the 1600/1800 as
well as the flow in the existing furnace. Ducting entering the
BAFFLE
EXISTING
FURNACE
1" MIN.
HOTBLAST
FURNACE
9 FEET
EXISTING
FURNACE
(if used)
existing plenum at an angle (approximately 45 degrees) will
facilitate air flow from the furnace while diverting air from the
existing furnace.
2" MIN.
HOT AIR
PLENUM
HOTBLAST
FURNACE
9 FEET
HOTBLAST
FURNACE
EXISTING
FURNACE
1" MIN.
HOT AIR DUCT
MINIMUM CLEARANCES
TO COMBUSTIBLES
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. The cold air return duct
can be connected to the furnace with either a factory manufactured U.S. Stove filter box or an equivalent fabricated from
sheet metal (See pages 21-23).
INCORRECT
When installing a cold air return, the following minimum
INSTALLATION
size should be maintained to insure proper furnace
performance.
NO RETURN
Model 1600 — 16" x 20" or equivalent
AIR PROVIDED
Model 1800 --- 16" x 20" or equivalent
INSTALLATION NO. 3
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.
RETURN AIR IS VERY IMPORTANT
When installing a Hotblast Furnace, return air must be
4
Failure to provide return air ducts of the specified size
voids the furnace warranty.
HOTBLAST
FURNACE
EXISTING
FURNACE
A filter should be installed in the cold air return. Furnace filters
should be checked and cleaned or replaced regularly.
If return air is not provided, the warm air distributed into your
home will be restricted and the efficiency of the furnace
decreased. Without 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 air tight, the large blower on the 1600/1800 could
depressurize the room and pull toxic flue gases from the
furnace, a gas water heater, or gas furnace. The fumes could
then be distributed throughout the house.
COMBUSTION AIR
All fires need air (specifically oxygen) to burn. Furnaces,
fireplaces, and wood-burning furnaces need enough oxygen
for complete combustion of their fuels. The 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 prevents this "air
starvation" of the furnace.
ASSEMBLY INSTRUCTIONS
to make sure there is no
shipping damage, and that
all necessary parts are
located in the firebox. See
parts list below.
If you find shipping damage
or any of the parts missing,
contact the dealer immedi-
Three 1/2" Lock Nuts
One 1/2" x 2 1/2" Carriage Bolt
Six 1/4" x 3/4" Hex Bolts
Smoke Door
Two 1/4" x 1-1/4" Carriage Bolts
MODEL 1600 - (6) BRICKS ON EACH SIDE
FIREBOX LEFT SIDE
Your furnace is shipped from the factory in four (4) packages.
1) the furnace, 2) the blower, 3) draft kit, 4) fan limit kit or
electronic circuit board . Before assembling the furnace, check
ately. He will take the necessary steps to correct the problem.
Parts List
All models include the following:
Two Door Handles
One Fuel Door Latch
One Ash Door Latch
One Shaker Grate Handle
Two 1/2" Washers
Four 1/4" Hex Nuts
Four Lock Washers
Spin Draft
Five 1/4" Lock Nuts
One Pivot Bracket
Four Brass Coil Knobs
One 1/4" x 1" Hex Bolt
FUEL DOOR
ILLUSTRATION
ASH DOOR
ILLUSTRATION
BRICK RETAINING STRIP
SLIDE 4th BRICK BACK
BEFORE INSTALLING 5th
AND 6th BRICK
MODEL 1800 - (8) BRICKS ON EACH SIDE
FIREBOX LEFT SIDE
BRICK RETAINING STRIP
LOCK
WASHER
HEX
NUTS
Two Smoke Door Clips
Rod Extension
Manual
5
DOOR HANDLE INSTALLATION
Insert door handle into door. From rear side of door place
1/2" washer over threaded part of door handle. Then attach
1/2" lock nut, being careful not to over tighten. Handle should
turn freely.
FUEL & ASH DOOR LATCH INSTALLATION
With two 1/4" x 3/4" hex bolts, attach the door latch to the
MODEL 1600
(41/2) BRICKS
MODEL 1800
(6) FULL BRICKS
2
1
1/2 BRICK
3
5
4
6
BAFFLE
ROD
EXTENSION
BAFFLE
ROD
1-1/2"
HEX COUPLING
THE MODELS 1600 AND 1800 HAVE BEEN
2
1
3
4
5
6
7
EQUIPPED WITH DIFFERENT PLENUM
OPENINGS, THEY ARE AS FOLLOWS:
door latch mounting bracket on the left side of door frame as
illustrated. Adjust latch until door closes securely.
TOP
REAR OF
FIREBOX
MODEL 1800
18"x18" Square Plenum Opening
6
BRICK INSTALLATION
(PRE-INSTALLED AT FACTORY)
The firebrick must be inserted on each side resting on the
SMOKE DOOR CLIPS
1/4" LOCK
NUTS
1/4" X 1-1/4"
CARRIAGE BOLTS
FRONT
OF
FURNACE
NOTE: Prior to operation, be sure to remove brick
retaining strips.
FIREBOX:
1
2
FUEL
SMOKE DOOR
LOADING
DOOR
FRAME
grate frame. First, place cut brick in each back corner. Place
remaining brick in place.
SMOKE CHAMBER:
1.Place #1 firebrick in the back of smoke chamber.
2.Slide baffle plate into smoke chamber, flat side down.
3.Place remaining firebrick in smoke chamber as
SPIN DRAFT CAP
1/2" X 2-1/2"
CARRIAGE
BOLT
3
1/2" LOCK NUT
7
MOUNTING PROCEDURE FOR DRAFTS
DRAFT
TUBE
CLAMP
MOTORIZED NATURAL DRAFT
FORCED AIR DRAFT
(SHIPPED WITH UNIT)
1. Using (2) 1/4" x 1" bolt, lock washer and nut, attach draft
adapter bracket to furnace draft tube.
OPTIONAL
MOTORIZED NATURAL DRAFT
Models 1600 / 1800
1.Using (2) 1/4" x 1" bolts, lock washers and nuts,
attach draft to furnace with draft tube clamp.
2.Plug draft power cord into receptacle on front of furnace.
MODEL 1600/1800 KIT #C60357M
MODEL 1600/1800
KIT #69189
8
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