Hotblast 1300 User manual

UNITED STATES STOVE COMPANY
227 Industrial Park Road
P.O.Box 151
South Pittsburg, TN 37380
800-750-2723
www.USSTOVE.com
Models 1300/1400/1500
OWNER'S MANUAL
SOLID FUEL
WARM AIR FURNACE
FOR PARALLEL INSTALLATION WITH EXISTING FORCED AIR-GAS OR OIL FIRED FUR-
NACE (U.S. ONLY)
FOR INSTALLATION AS A CENTRAL FURNACE
THE 1500 HOTBLAST FURNACE HAS BEENAPPROVED FOR
U.S. INSTALLATIONS ONLY.
ALL MODELS CERTIFIED UNDER UL 391
MODELS 1300/1400 ARE ALSO CERTIFIED UNDER CAN/CSA-B366.1-M91
MODEL 1400 IS WOOD ONLY
851486 K-1905E
CAUTION:
READALLINSTRUCTIONSCARE-
FULLY BEFORE STARTING THE
INSTALLATIONOR OPERATING
THE FURNACE
IMPROPER INSTALLATION MAY
VOID YOUR WARRANTY
DO NOT USE THIS FURNACE
IN A MOBILE HOME OR TRAILER
U.S. Environmental Protection Agency
Certified to comply with 2015 particulate emissions standards.

2
NOTE: YOUR UNIT MUST BE INSTALLED BY A
QUALIFIED FURNACE INSTALLER.
You'vepurchasedoneofAmerica'sFinestWoodandCoalBurningFurnaces. Byheat-
ing with wood and coal you're helping CONSERVE AMERICA'S ENERGY! Wood is
our Renewable Energy Resource. Please do your part to preserve our wood supply.
Plant at least one tree each year. Future generations will thank you.
CONGRATULATIONS!
TOOLS
Pencil
6 Foot Folding Rule or Tape
Tin Snips
Drill, Hand or Electric
Drill Bit- 1/8" Dia.
(For Sheet Metal Screws)
Screw Driver (Blade-Type)
Gloves
Sabre Saw
5/16" Nut Driver or
5/16" Socket w/Ratchet
Safety Glasses
MATERIAL
6" Pipe, 6" Elbow, Collar and Thimble;
as required (24 gauge min.)
1/2" Sheet Metal Screws
6" Inside diameter Listed Residential
Type or Building Heating Appliance
Chimney or existing masonry chimney
Electrical Wiring
6" Draft Regulator
1/2" Conduit (Conduit Connectors)
Furnace Cement (Manufacturer
Recommends: Rutland Black-Code 78
or Equivalent)
Plenum and Duct work as required.
TOOLS AND MATERIALS NEEDED

3
Caution Labels
Caution Labels
Your Furnace has the following labels. Read and Obey all labels.
DANGER: RISK OF FIRE OR EXPLOSION.
DO NOT burn garbage, gasoline, drain oil, or other flammable liquids.
WARNING: FIRE HAZARD.
DO NOT operate with fire draft exceeding .06 inches w.c.
DO NOT operate with fuel loading or ash removal doors open.
DO NOT store fuels, paints, thinners, flammable liquids, or other highly volatile sub-
stances in the furnace room.
CAUTION:
HOT SURFACES! Keep children away. Do not touch during operation.
SAFETY NOTICE:
If this heater is not properly installed, a house fire may result. For your
safety, follow the installation directions. Contact local building or fire of-
ficials about restrictions and installation inspection requirements in your
area. If not already installed, we recommend that smoke detectors be
installed.
CAUTION!
CLEANOUTOFTHEHEATEXCHANGER,FLUEPIPE,CHIMNEY,AND
DRAFTINDUCER(IFUSED),ISESPECIALLYIMPORTANTATTHEEND
OFTHE HEATINGSEASONTOMINIMIZE CORROSION DURINGTHE
SUMMER MONTHS, CAUSED BYACCUMULATED ASH.
CAUTION!
INSPECT FLUE PIPES, FLUE PIPE JOINTS AND FLUE PIPE SEALS
REGULARLYTOENSURETHATSMOKEANDFLUEGASESARENOT
DRAWNINTO,ANDCIRCULATEDBY,THEAIRCIRCULATIONSYSTEM.

4
Rules for safe installation and operation
Read these rules and the instructions carefully. Failure to follow them will cause a
hazard that could result in death, serious bodily injury, and/or property damage.
Your Furnace is designed to be installed in a parallel air flow arrangement with a gas or oil-
fired forced air upflow-type central furnace, or it may be installed as a central furnace.
1. Check your local codes. The installation must comply
with their rulings.
2. Do not install this furnace in a mobile home or trailer.
3. Always connect this furnace to a chimney and vent to
the outside. Never vent to another room or inside a
building.
4. Donotconnect thisfurnacetoanaluminumTypeBgas
vent. This is not safe and is prohibited by the National
FireProtectionAssociationCode.Thisfurnacerequires
amasonryorListedFactoryBuiltChimneyforresidential
type or Building HeatingAppliance Chimney. Use a 6"
diameter chimney or larger, that is high enough to give
a good draft.
5. Be sure that if a masonry chimney is used, it is safely
constructed and in good repair. Have the chimney
inspected by the Fire Department or an inspector.
6. Inspect chimney connector and chimney before and
frequently during the heating season for any deposit
of creosote or soot which must be removed.
7. Provide air for combustion into the room where the fur-
nace is located. If the intake is not in the same room,
air must have free access to the room.
8. CASTIRONPARTSMUSTBE"SEASONED"TOAVOID
CRACKING, BUILD ONLY SMALL FIRES ON FIRST
USE.
9. To prevent injury, do not allow anyone to use this fur-
nacewho isunfamiliar with thecorrectoperation ofthe
furnace.
10. For further information on using your furnace safely,
obtainacopyofthe NationalFireProtectionAssociation
(NFPA) publication "Chimney's, Fireplaces and Solid
Fuel Burning Appliances" NFPA 211. The address of
the NFPA is Batterymarch Park, Quincy, MA 02269.
11. Keep the ashpit section free of excess ashes. Do not
allow ashes to stack higher than the sides of the ash
pan.
12. DISPOSALOFASHES-Placeashesinametalcontainer
with a tight fitting lid. Keep the closed container on a
noncombustible floor or on the ground, well away from
allcombustiblematerials. Keeptheashesintheclosed
container until all cinders have thoroughly cooled. The
ashes may be buried in the ground or picked up by a
refuse collector.
13. CAUTION- The special paints used on your furnace
may give off some smoke while they are curing dur-
ing first few fires., Build small fires at first. The metal
used in construction of the furnace and duct work has
a light coating of oil. This could give off smoke and/or
odor from registers when furnace is used for the first
time. Thisshoulddisappearafterashortperiodoftime.
Once this burn-off has occurred, it should not reoccur.
14. CARING FOR PAINTED PARTS- This furnace has a
painted outside jacket, which is durable, but it will not
stand rough handling or abuse. When installing your
furnace, use care in handling. Clean with soap and
warm water when furnace in not hot. DO NOT use
any acids or scouring soap, as these wear and dull
the finish. DISCOLORATION WILL OCCUR IF THE
FURNACEISOVERHEATED. FOLLOWOPERATING
INSTRUCTIONS CAREFULLY.
15. Keep the feed and ash doors closed at all times except
while tending the furnace.
CAUTION
DO NOT OPERATE WITH THE FEEDAND/OR ASH
DOOR OPEN. THIS FURNACE IS DESIGNED FOR
THERMOSTATICOPERATION. OPERATIONWITH
ANY OF THESE DOORS OPEN WILL OVERHEAT
AND DAMAGE THE FURNACE.
WARNING
NEVERSTOREFLAMMABLELIQUIDS,ESPECIALLY
GASOLINE, IN THE VICINITY OF THE FURNACE.
CAUTION
GASES THAT ARE DRIVEN FROM FRESH COAL
MUSTBEBURNEDORTHEYWILLACCUMULATE
AND EXPLODE. NEVER SMOTHERAFIRE WHEN
ADDING FRESH COAL.
CAUTION
NEVER USE GASOLINE, GASOLINE-TYPE LAN-
TERN FUEL, KEROSENE, CHARCOAL LIGHTER
FLUID, OR FLAMMABLE LIQUIDS TO START OR
"FRESHEN UP" A FIRE IN THE FURNACE.

5
YourHOTBLASTFurnaceisdesignedtobeasupplemental
or central heating source for your home. This Solid Fuel
Furnacemaybeinstalledinconjunctionwithaproperlyoper-
ating central furnace that is listed or certified in accordance
with nationally recognized safety standards and equipped
with the required controls and other safety features and
which has been installed in accordance with appropriate
standards of the National Fire Protection Association with
installation clearances specified in the furnace nameplate
marking. Theinstallationmustbeaccomplishedbyaqualified
agency(one who isengaged in, andis responsible for,or is
thoroughlyfamiliar with theinstallation and operationof the
gas, oil, and solid fuel burning heating appliances, who is
experiencedinsuch work,familiarwithalltherequirements
of the authority having jurisdiction.) The installation shall
be in strict accordance with the manufacturer's installation
instructions furnished with the solid fuel furnace.
The chimney connector of the furnace is to be installed to
provide clearances to combustible material not less than
specifiedinthe individualclassificationsandmarkedonthe
furnace. The chimney connector must be connected to a
chimney suitable for use with residential type or building
heating appliances which burn solid fuel.
The Furnace is designed to operate in either parallel or
series air flow arrangement with the central furnace or as
a central furnace.
CENTRAL FURNACE INSTALLATION
Asacentralfurnace,theunitfunctionsindependentlyofany
other system. The blower will come on when the plenum
temperature reaches the setting on the blower control.
PARALLEL INSTALLATION (U.S. ONLY)
Thedesignissuchthatwhentheblowercomeson,theblower
on the central system also comes on. The blower will only
come on when the temperature in the plenum has reached
thesettingontheblowercontrol. Thisistoinsurethatthere
is sufficient warm air in the system to make it efficient for
the unit to operate. When the central system thermostat
calls for heat, the central system will operate by the burner
igniting and the blower coming on. It is possible that both
systems will operate simultaneously. It is recommended
that for the most efficient use of your HOTBLAST Furnace,
that it be fired as much as possible in order to reduce the
demand on your existing central heating system. This unit
has an optional forced draft kit that operates from a wall
thermostat. When the temperature falls below the setting
on the wall thermostat, the forced draft will come on (U.S.
Stove Option 11/DIKL)
The warm air supply outlet of the HOTBLAST Furnace
shall not be connected to the cold air return of the central
furnace,becausethepossibilityexistsofcomponentsofthe
centralfurnaceoverheatingandcausingthecentralfurnace
to operate other than is intended.
SERIES INSTALLATION
Thistypeofinstallationusesonlytheblowersoftheexisting
central furnace. The solid fuel fan/limit control must also
control the functions of the existing furnace. All electrical
power must come from a single branch circuit.
HOW THE FURNACE FUNCTIONS

6
DIMENSIONS OF FURNACE
Figure 2
Models 1400/1500
Figure 1
Model 1300

7
LOCATING THE FURNACE
1. Thefurnace shouldbe locatedinthesameroom asthe
central system and as close as possible, but not closer
than 9". There should be no wall between the furnace
and the warm air outlet duct that is connected directly
to the warm air outlet plenum of the central furnace.
(See Fig. 4)
2. Place the furnace on a noncombustible floor.
3. Checkfigures 3through5. Be sureyou havetheclear-
ancesshownbelowfromthefurnaceandtheconnector
pipe to combustible surfaces. If you have a solid brick
or stone wall behind your furnace, you can place the
furnace as close as you wish to the wall. If the wall is
only faced with brick or stone, treat it as a combustible
wall.
18"
18"
6" SOLID DAMPER
6" BAROMETRIC
DRAFT REGULATOR
NON-COMBUSTIBLE FLOOR
12"
9"
48"
18"
CENTRAL
FURNACE
6" CHIMNEY
21"
Figure 4
Figure 5
1300 1400 1500
Unit to Sidewall 12"
(305mm) 12" (305mm) 12" (305mm)
Unit to Backwall 30"
(760mm) 30" (760mm) 30" (760mm)
Front of Unit to
Combustible 48" (1.22m) 48" (1.22m) 48" (1.22m)
Chimney Pipe
to Sidewall 18" (460mm) 18" (460mm) 21" (530mm)
Chimney Pipe
to Backwall 18" (460mm) 18" (460mm) 18" (460mm)
Plenum to
Combustibles 6" (150mm) 6" (150mm) 6" (150mm)
2" MIN. AIR SPACE
REQUIRED BY CODE
CENTRAL
FURNACE
6" MIN.
PLENUM
TO
CEILING
Figure 3

8
10'
2' MIN.
3' MIN.
6" CHIMNEY CONNECTOR
6" ELBOW
6" SOLID DAMPER
6" BAROMETRIC
DRAFT REGULATOR
REFER TO CHIMNEY
MANUFACTURER'S
INSTRUCTIONS AND
PARTS.
Chimney Connection
MASONRY CHIMNEY
Before using an existing masonry chimney, clean the chimney
and inspect the flue liner to be sure it is safe to use. Make repairs
before attaching the furnace. The connector pipe and fittings you
will need to connect directly to a masonry chimney are shown.
The chimney connection should be as short as possible.
If the connector pipe must go through a combustible wall before
entering the masonry chimney, consult a qualified mason or
chimneydealer. The installationmustconform tolocal firecodes,
and N.F.P.A. 211.
DO NOT CONNECT THIS FURNACE TO A CHIMNEY
FLUE SERVING ANOTHER APPLIANCE.
The chimney used for a furnace must not be used to ventilate the
cellar or basement. If there is a cleanout opening at the base of
the chimney, close it tightly.
LISTED FACTORY BUILT CHIMNEY
Carefully follow chimney manufacturer's instructions. Use only a
Listed Residential Type or Building Heating Appliance Chimney.
If your chimney starts at the ceiling (Fig. 7), you will need enough
6" pipe to reach the ceiling.
The top of the chimney must be at least 3 feet above the roof
and be at least 2 feet higher than any point of the roof within 10
feet (Fig. 7).
IMPORTANCE OF PROPER DRAFT
Draft is the force which moves air from the appliance up through
thechimney.Theamount ofdraft inyourchimneydependson the
length of the chimney, local geography, nearby obstructions and
other factors. Too much draft may cause excessive temperatures
inthe appliance.Inadequate draftmay causebackpuffing intothe
room and ‘plugging’ of the chimney.
“Inadequate draft will cause the appliance to leak smoke into the
room through appliance and chimney connector joints.”
“An uncontrollable burn or excessive temperature indicates ex-
cessive draft.”
Take into account the chimney’s location to insure it is not too
close to neighbors or in a valley which may cause unhealthy or
nuisance conditions.
6" SOLID DAMPER
6" BAROMETRIC
DRAFT REGULATOR
THIMBLE
6" ELBOW
6" CHIMNEY
CONNECTOR
6" ELBOW
NON-COMBUSTIBLE WALL
Figure 6
Figure 7

9
1. Thecrimpedendofthechimneyconnectorfitsinsidethefurnace
flue collar. Install additional chimney connectors and elbow
with the CRIMPED END TOWARD THE FURNACE. This will
allow any condensation in the flueto run back intothefurnace.
Use 6" dia. steel pipe and elbows for connection to chimney.
Never use less than 24 gauge and although blued steel is
satisfactory, high temp painted black is much more desirable.
(See Figure 8)
2. Slope any horizontal pipe upward toward the chimney at least
1/4 inch for each foot of horizontal run.
3. You must have at least 18 inches of clearance between any
horizontal piping and the ceiling.(See Fig. 5)
4. The chimney connector must not extend into the chimney flue.
(See Fig. 9)
5. Seal each chimney connector pipe joint with furnace cement.
Also seal the pipe at the chimney.
6. Use 3 sheet metal screws at each chimney pipe joint to make
the piping rigid.
7. Thechimneyconnector may includeasection for abarometric
draft regulator between the furnace and the chimney (Fig. 6,
7, & 10). The barometric draft regulator must be installed in
the same room (same pressure zone) as the furnace.
8. Install the barometric draft regulator strictly in accordance
withtheinstructions that areprovidedwith the barometricdraft
regulator.
9. A solid damper must be used in the chimney connecting pipes
betweenthefluecollarandthechimney. Whenusedinconjunc-
tion with a barometric draft regulator, the solid damper must be
placed between the barometric and the chimney. (See Fig. 6,
7, & 10)
ADJUSTING THE BAROMETRIC DRAFT
REGULATOR
1. Drillaholeinthechimneyconnectorwithin18"ofthefluecollar
below the barometric draft regulator just large enough for the
tube of the manometer.
2. Build a fire after all chimney connections have been made.
3. Use a manometer to measure the draft in the flue.
4. Adjust the Barometric Draft Regulator to obtain a draft of 0.05
- 0.06" W.C. under stable fire conditions.
RIGHT WRONG WRONG
6" SOLID DAMPER
6" BAROMETRIC
DRAFT REGULATOR
NON COMBUSTIBLE
INSTALLATION PER
NFPA 211
MEASURE FLUE DRAFT HERE
Figure 9
Figure 10
Rules for Connector Pipe Installation
NOTE:
A flue pipe shall not pass through an attic, roof
space,closetorsimilarconcealedspace,afloor
or ceiling of combustible construction. Where
passage through a wall or partition is desired,
installation must conform with UL standards.
Figure 8

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CONNECTION OF CHIMNEY CONNECTOR TO A MASONRY CHIMNEY
THROUGH A COMBUSTIBLE WALL
Figure 8 shows how to connect the chimney connector of a heater to a masonry chimney through a combustible wall.
There are five allowable ways that a chimney connector can be connected to a masonry chimney by passing through a combustible
wall. NFPA Standard 211 allows the following wall pass-through systems.
Figure 11