USSC Hotblast 1303 User manual

ASSEMBLY
INSTALLATION
OPERATION
REPAIR PARTS
CAUTION IMPROPER INSTALLATION
READ ALL INSTRUCTIONS CAREFULLY MAY VOID YOUR WARRANTY
BEFORE STARTING THE INSTALLATION SAVE THIS MANUAL FOR
OR OPERATING THE FURNACE FUTURE REFERENCE
FOR PARALLEL INSTALLATION WITH EXISTING AIR, GAS OR OIL FIRED FURNACE
OR FOR INSTALLATION AS A CENTRAL FURNACE
DO NOT USE THIS FURNACE IN A MOBILE HOME OR TRAILER
UNITED STATES STOVE COMPANY
227 Industrial Park Rd., P.O.Box 151
South Pittsburg, TN 37380
[phone]
85759H 12/96
WARNOCK HERSEY
R
MODEL 1303
Owners Manual
SOLID FUEL WARM AIR FURNACE
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CONGRATULATIONS!
You've purchased one of America's Finest Wood Burning Heaters. By
heating 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.
NOTE: YOUR UNIT MUST BE INSTALLED BY A QUALIFIED
FURNACE INSTALLER. IMPROPER INSTALLATION COULD
VOID YOUR WARRANTY!
NOTE: (See Page 5, First Paragraph)
Tools And Materials Needed
TOOLS MATERIALS
Pencil 6" Pipe, 6" Elbow, Collar and Thimble
6 Foot Folding Rule or Tape as required (24 gauge min.)
Tin Snips 1/2" Sheet Metal Screws
Drill, (Hand or Electric) 6" Inside diameter Listed Residential Type
Drill bit, - 1/8" dia. or Building Heating Appliance Chimney
(For Sheet Metal Screws) or existing masonry chimney (See Page 8)
Screw Driver (Blade-Type) Electrical Wiring
Gloves 6" Draft Regulator
Sabre Saw 1/2" Conduit (Conduit Connectors)
5/16" Nut Driver or Furnace Cement
5/16" Socket w/Ratchet Manufacturer Recommends:
Safety Glasses Rutland Black-Code 78 or Equivalent
Plenum and Duct work as required.
2

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 fuel or other combustible material within the marked
installation clearances.
DO NOT store fuels, paints, thinners, flammable liquids, or other highly
volatile substances 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 officials about restrictions and installation
inspection requirements in your area.
3
CAUTION LABELS

Rules for safe installation and operation
Read these rules and the instructions carefully. Failure to follow them will cause a hazard that
could result in death, serious bodily injury, and/or property damage.
1. 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. Do not connect this furnace to an aluminum Type B gas vent. This is not safe and is pro-
hibited by the National Fire Protection Association Code. This furnace requires a masonry
or listed factory built chimney for residential type or building heating appliance chimney.
Use a 6" diameter chimney or larger, that is high enough to give a good draft,(See Page 8)
5. Be sure to use a masonry chimney that 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 (See Chimney Maintenance,
page 18).
7. Provide air for combustion into the room where the furnace is located. If the intake is not
in the same room, air must have free access to the room.
8. CAST IRON PARTS MUST BE "SEASONED" TO AVOID CRACKING. BUILD ONLY
SMALL FIRES ON FIRST USE.
9. To prevent injury, do not allow anyone to use this furnace who is unfamiliar with the
correct operation of the furnace.
10. For further information on using your furnace safely, obtain a copy of the National Fire
Protection Association (NFPA) publication "Chimneys, Fireplaces, and Solid Fuel Burning
Appliances" NFPA 211. The address of the NFPA is Batterymarch Park, Quincy, MA
02269.
11. Keep the ash pit section free of excess ashes. Do not allow ashes to stack higher than
the sides of the ash pan.
12. DISPOSAL OF ASHES - Place ashes in a metal container with a tight fitting lid. Keep the
closed container on a noncombustible floor or on the ground, well away from all combus-
tible materials. Keep the ashes in the closed container until all cinders have thoroughly
cooled. The ashes may be buried in the ground or picked up by a refuse collector.
13. CAUTION - The special paints used on your furnace may give off some smoke while they
are curing during the first few fires. Build small fires at first. The metal used in construc-
tion of the furnace and duct work has a light coating of oil. This could give off smoke and/
or odors from registers when furnace is used for the first time. This should disappear after
a short period of time. Once this burn-off has occurred, it should not reoccur.
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 is not hot. DO NOT use
any acids or scouring soap, as these wear and dull the finish. DISCOLORATION WILL
OCCUR IF THE FURNACE IS OVERFIRED, FOLLOW OPERATING INSTRUCTIONS
CAREFULLY.
15. Keep the feed and ash doors closed at all times, except while tending the furnace.
Your furnace is designed to be installed in a parallel air flow arrangement with a gas or oil- fired forced
air flow - type central furnace, or it may be installed as a central furnace.
4

How The Furnace Functions
PARALLEL INSTALLATION: The design is
suchthatwhentheblowercomeson,theblower
will only come on when the temperature in the
plenum has reached the setting on the blower
control. This is to insure that there is sufficient
warmairinthesystemtomakeitefficientforthe
unit to operate. When the central system ther-
mostat 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 Supple-
mental Furnace, that it be fired as much as
possibleinordertoreducethedemandonyour
existing central heating system.
TheWarmairsupplyoutletoftheSupple-
mentary Furnace shall not be connected to the
cold air return inlet of the central furnace be-
cause the possibility exists of components of
thecentralfurnaceoverheatingandcausingthe
centralfurnacetooperateotherthanisintended.
CENTRAL FURNACE INSTALLATION: As a
centralfurnace,theunitfunctionsindependently
of any other system. The blower will come on
whentheplenum temperaturereachesthe set-
ting on the blower control.
YourModel1303Furnaceisdesignedto
beasupplementalorcentralheatingsourcefor
your home. This solid fuel furnace may be
installed in conjunction with a properly operat-
ing central furnace that is listed or certified in
accordance with nationally recognized safety
standards and equipped with the required con-
trols and other safety features and which has
been installed in accordance with appropriate
standardsofthe NationalFireProtection Asso-
ciation with installation clearances specified in
the furnace nameplate marking. The installa-
tionmustbeaccomplishedbyaqualifiedagency
(one who is engaged in, and is responsible for,
oristhoroughlyfamiliarwiththeinstallationand
operation of the gas, oil, and solid fuel burning
heatingappliances,whoisexperiencedinsuch
work,familiarwithallprecautionsrequired,and
has complied with all the requirements of the
authority having jurisdiction.) The installation
shall be in strict accordance with the
manufacturer'sinstallationinstructionsfurnished
with the solid fuel furnace.
Thechimneyconnectorofthefurnaceis
tobeinstalledtoprovideclearancestocombus-
tible material not less than specified in the
individual classifications and marked on the
furnace. The chimney connector must be con-
nected to a chimney suitable for use with resi-
dentialtypeorbuildingheatingapplianceswhich
burn solid fuel.
The Model 1303 Furnace is designed to
operate in a parallel air flow arrangement with
an existing central furnace or as a central fur-
nace. The furnace is designed to operate in
either of the following installations:
5

1303
DIMENSIONS
Shown in Fig. 1 are the dimensions of the furnace.
6
20
36 3/8
32-1/8 2
30 - 9/16
41
Fig. 1

1. The furnace should be located in the
same room as the central system and as
close as possible, but not closer than 9".
There should be no wall between the
furnaceandthewarmairoutletductthatis
connected directly to the warm air outlet
plenum of the central furnace.
See Fig. 2.
2. Theunitwillrequireinstallationwiththe
following clearances:
Unittosidewall....................................12"
Unit to backwall..................................30"
Chimney connector pipe to sidewall
.........................................................21"
Chimney connector pipe to backwall
.........................................................18"
Hot air ducts to combustibles................6"
NOTE: Install only on a noncombustible
floor. (REFER TO FIG. 2 & 3)
3. Placethefurnaceonanoncombustible
floor.
4. Check figures 2 and 3. Be sure you
have the clearances shown from the fur-
nace and the connector pipe to combus-
tible surfaces. If you have a solid brick or
stone wall behind your heater, you can
place the furnace as close as you wish to
thewall. If thewall isonly facedwith brick
or stone, treat it as a combustible wall.
Locating the Furnace
7
18"
18"
6" SOLID DAMPER
6" BAROMETRIC
DRAFT REGULATOR
(OPTIONAL)
NON-COMBUSTIBLE FLOOR
12" 9"
48"
18"
CENTRAL
FURNACE
Fig. 2
Fig. 3

Chimney Connection
MASONRY CHIMNEY
Beforeusing an existingmasonry chimney,clean the chimneyand inspectthe flue linerto besure
it is safe to use. Make repairs before attaching the furnace. See page 4, item 5. Look at Fig. 4.
Theconnectorpipe and fittingsyouwill need toconnectdirectly to amasonrychimney areshown.
The chimney connection should be as short as possible.
If the connector pipe must go through a combustible wall before entering the masonry chimney,
consultaqualifiedmasonorchimneydealer. Theinstallationmustconformtolocalfirecodes,and
N.F.P.A. 211.
DO NOT CONNECT THIS FURNACE TO A CHIMNEY FLUE SERVING ANOTHER APPLI-
ANCE.
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. 5), you will need
enough 6" pipe to reach the ceiling.
Thetopof the chimneymustbe atleast3feet abovetheroof and beatleast 2feethigherthan any
point of the roof within 10 feet (Fig. 5).
8
6" SOLID DAMPER
6" BAROMETRIC
DRAFT REGULATOR
(OPTIONAL)
THIMBLE
6" ELBOW
6" CHIMNEY
CONNECTOR
6" ELBOW
NON-COMBUSTIBLE
WALL
CONNECTOR
FROM CEILING TO TOP OF
18" MIN. CLEARANCE FROM
Fig. 4
10'
2' MIN.
3' MIN.
6" CHIMNEY CONNECTOR
6" ELBOW
6" SOLID DAMPER
6" BAROMETRIC
DRAFT REGULATOR
(OPTIONAL)
REFER TO CHIMNEY
MANUFACTURER'S
INSTRUCTIONS AND
PARTS.
Fig. 5

Rules for Connector
Pipe Installation
1. The crimped end of the chimney connector fits
insidethefurnacefluecollar. Install additional chim-
ney connectors and elbow with the CRIMPED END
TOWARD THE FURNACE. This will allow any
condensationintheflue torunbackinto thefurnace.
Use 6" dia. steel pipe and elbows for connection to
chimney. Never use less than 24 gauge and al-
thoughblued steel issatisfactory, hightemp painted
black is much more desirable.
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. 3)
4. The chimney connector must not extend into the
chimney flue. (See Fig. 6)
5. Seal each chimney connector pipe joint with fur-
nace 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. Thechimney connector may includea section for
abarometricdraftregulatorbetweenthefurnaceand
the chimney (fig. 4,5, &7). 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 with the instructions that are provided
with the barometric draft regulator.
9. A solid damper must be used in the chimney
connecting pipes between the flue collar and the
chimney. Whenusedinconjunctionwitha baromet-
ric draft regulator, the solid damper must be placed
between the barometric and the chimney. (See Fig.
4,5,7)
Adjusting the Barometric Draft Regula-
tor
1. Drilla hole in thechimney connector within 18"or
the flue collar 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. Useamanometertomeasurethedraftintheflue,
(U. S. Stove Model DG-26).
4. Adjust the Barometric Draft Regulator to obtain a
draftof0.05-0.06"W.C.understablefireconditions.
9
RIGHT WRONG WRONG
Fig. 6
6" SOLID DAMPER
6" BAROMETRIC
DRAFT REGULATOR
(OPTIONAL)
MEASURE FLUE
DRAFT HERE
NON-COMBUSTIBLE
INSTALLATION PER
NFPA 211
Fig. 7

Assembly of Furnace
Your furnace requires the following items to be assembled or installed by the service person:
BLOWER AND BLOWER CONTROLS
ELECTRICAL CONNECTIONS
1.Removeallpartsfrominsidethefurnaceandinspectfordamage. Includingthefirebrick,assome
damage could have occurred during shipment.
2. Place base assembly in area where furnace will be installed, and place furnace on base as
shown in Figure 8. Be certain furnace fits inside tabs as shown.
3. Install Honeywell Fan/Limit Control on rear of cabinet as shown in Fig. 8.
NOTE: Remove cover of Fan/Limit control for access to screw holes.
4.Removeblowerfromcartonandinspectfordamage. Removecoverfrom4"junctionboxonrear
of furnace. (See Fig. 8)
5.Attach clip nuts toblower opening on rear of furnace asshown. Install blower and gasketusing
1/4-20x3/4" bolts provided.
6.Completeallwiringin4"junctionboxbyreferencetowiringdiagram,Fig.9,Page11. Afterwiring
is completed, remember to replace junction box cover.
10
Honeywell
FAN/LIMIT
CONTROL
4" ELECTRICAL
JUNCTION BOX
BLOWER
ASSEMBLY
GASKET
CLIP NUTS
NOTE: DO NOT USE CLIP NUT OR BOLT
ON UPPER CENTER HOLE
Fig. 8

Model 1303 Wiring Diagram
11
LOAD
FAN
LINE
LOAD
LIMIT
LINE
BREAK OFF
JUMPER FOR
LOW VOLTAGE
FAN "OFF"
INDICATOR FAN "ON"
INDICATOR
LIMIT
INDICATOR
Honeywell
LIMIT SWITCH
R1R2
G
W
110
VAC,
60
HZ.
GROUND GB
W
ELECTRICAL JUNCTION BOX
M1M2
BLOWER
MOTOR
IMPORTANT: POWER SUPPLY WIRING MUST NOT BE LESS THAN 90 CENTIGRADE.
POWER
CORD
WIRE COLOR CODE
G- GREEN- GROUND
B- BLACK- POWER SUPPLY
W- WHITE- POWER SUPPLY
R1- WHITE- FAN CONTROL
R2- BLACK- FAN CONTROL
M1- BLACK- FAN CONTROL
M2- WHITE- BLOWER MOTOR
Fig. 9

Installation
Please see all methods of Installation in
Appendix at the rear of this booklet.
This is a furnace, not a free standing stove.
Youmustdirectheatedairfrom8"outletsawayfrom
the furnace, or it will not function properly.
1. This installation must be done by a qualified
heating equipment installer.
2. The installation is to be done in compliance with
NationalFireProtectionAssociationinstallationstan-
dards: No. 89M, 90B, 211, 70 (National Electrical
Code) and Uniform Mechanical Code 913, 6-4, in
the states where applicable. (Their code offers
connecting smoke pipe connectors into chimney
with other fuel burning appliances.)
3. Rooms large in comparison with size of the
appliance:
a)Wood or Coal Burning Furnace needs air for
combustion and circulation to house.
b) Provision must be made to make up this air
and not starve gas or oil furnace of combustion air.
c) Have "Authority Having Jurisdiction" deter-
mine that air is of adequate makeup. (Reference
N.F.P.A.Nos.30&54,CodeforInstallationofGas&
Oil Equipment).
4. Have"AuthorityHavingJurisdiction"istoinspect
all chimneys and installations for adequate venting
and for compliance with standard and local codes
andregulationsregardinginstallationofwoodburn-
ing appliances.
5. InstallationforSupplementalHeatApplicationto
Existing Central System. (See Fig. 2 for typical
installation.)
a) Place Wood or Coal Burning Furnace so that
the chimney connector will be as short as practi-
cable and avoiding unnecessary sharp turns in the
smoke pipe connector and the installation of de-
vices that would create excessive resistance to the
flow of flue gases.
b) Locate the Wood or Coal Burning Furnace as
close as practical to the existing central hot air
heating system, maintaining clearances as stated
on the label on the fuel door.
c) Clearance from combustible materials must
comply with those stated on the label on the fire
door: Unit to combustible:
Front: 48"
Back: 30"
Sides: 12"
Plenum to Ceiling: 6"
Pipe to combustible:
Sides: 21"
Back: 18"
The installation must be made only on a noncom-
bustible floor.
d) Install the smoke pipe connector to the chim-
ney with 26-gauge pipe and elbows (to be pur-
chased separately), maintaining the proper clear-
ancesforthespecificmodel. Sealthespokepipein
the chimney with furnace cement. (The chimney
connector shall be securely supported, and joints
fastened with sheet metal screws or rivets.)
e) Install 8" diameter heat pipe to plenum of the
central hot air furnace. Use 26-gauge pipe and
connectors(tobepurchasedseparately). (SeeFig.
14) If central air conditioning is installed in the
plenum, install heat pipe above the air conditioning
unit. Secure heat pipe connection with supports
and sheet metal screws.
f) Connect electrical supply in the electrical junc-
tion box that is mounted on the back of the Model
1303Furnace. SeeWiringDiagram(Fig.12orFig.
13). Remove the cover from electrical junction box
and connect power supply wires to wires desig-
nated, using wire nuts. The power cord supplied
may be used for installation, if permitted by local
codes and regulations. If the power cord supplied
cannotbeused,thepowersupplywiringmustbe90
degrees centigrade in a metal cable and should be
completed by a qualified installer complying with
NFPA Standard No. 70 and local codes.
g)Optional Plenum Fan Control Switch (Part No.
11PCS)isavailableforinstallationontheplenumof
central hot air heating furnace. The purpose of this
switchistoactivate the circulatingfanofthe central
hotairheatingfurnacewhenthetemperatureinthe
plenum exceeds 120 degrees F., and shut off the
fan when the temperature in the plenum is reduced
to 100 degrees F. This avoids overheating the
plenum.
The electrical supply for operation of this fan
control switch is to be obtained from the same
electrical supply as the central hot air heating sys-
tem. (See Fig. 14) Follow the instructions of the
wiring diagram (Fig. 5) Do not make connections
across Limit Control in the furnace.
Make electrical wire connections in accordance
with NFPA Standard No. 70 and local codes in the
powersupplyjunctionbox(SeeFig.15). Thewiring
to complete the connections should be 18 AWG
minimum copper and 90 degrees centigrade in a
cable.
12

1 23466 Cabinet Left Side 1
2 23464 Cabinet Back Panel 1
3 88032 Flue Collar Gasket 1
4 40246 Flue Collar 1
5 22761 Flue Collar Ring 1
6 83086 Flue Collar Mounting Bolts 1/4-20x3/4" 4
83227 Flue Collar Mounting Bolts 1/4-20x1" 2
7 83250 Flue Collar Mounting Nuts 1/4-20 kep nut 1
8 23462 Cabinet Top Panel 1
9 23465 Cabinet Right Side 1
10 23467 Front Upper Panel 1
11 23469 Right Upper Panel 1
12 23468 Front Bottom Panel 1
13 23470 Front Left Panel 1
14 68546 Firebox Weldment 1
15 68607 Feed Door Assembly (40186) 1
16 68699 Ash Door Assembly (40289) 1
17 17350 Brick Retainer (2ea.) 2
18 17130 Rear Liner 1
19 89066 Firebrick 10
20 40076 Grate 1
21 67444 Ash Pan 1
22 22538 Air Intake Box 1
23 22539 Air Intake Door 1
24 68560 Air Intake Box Cover Weldment 1
25 89503 Thermostat Linkage 1
26 67743 Thermostat 1
27 89142 Thermostat Knob 1
28 23463 Cabinet Bottom 1
29 23303 Access Plate 1
30 89354 Door Handle (Feed Door) 1
31 89354 Door Handle (Ash Door) 1
32 88033 3/8" Rope Gasket 44"
33 88033 3/8" Rope Gasket 29"
35 68561 Base Assembly 1
36 88064 Air Box Cover Gasket 1
37 68587 Outlet Baffle Weldment 1
38 23193 Baffle Bracket 1
39 22247 Front Firebox Liner 1
40 66080 Grate Liner Support 2
41 22090 Smoke Curtain 1
42 22171 Smoke Curtain Bracket 2
* 83086 Screw/ 1/4-20x3/4 MS,SL,FL 3
* 83250 1/4-20 Kep Nut 3
* 83872 Door Hinge Pin 1
* 68229 Blower Motor Assembly 1
* 83339 Blower Mounting Bolts (1/4-20x3/4") 5
* 83340 Blower Clip Nut (1/4-20"J") 5
* 89319 Blower Gasket 1
* 80154 Cord Strain Relief Bushing 1
* 80145 Blower Limit Control 1
* 80231 Junction Box Cover 1
* 80232 Power Supply Cord 1
* 68231 Limit Control Flex Conduit Assembly 13"
* 68232 Blower Flex Conduit Assembly 18"
* 85759 Owners Manual
* 87064 Red Spray Paint
* 89284 Silicone Sealant
* Not Shown
Repair Parts List Model 1303
KEY PART NO. DESCRIPTION QTY.
13

14
MODEL 1303 (See Repair Parts List on Page 13)
9
10
41
11
38
7
63
1
2
39
4
25
23
24
22
20
17
14
18
16 13
15
26
37
34
35
33
32
31
36
29
28
27
40
19
5
8
30
12
21
42

Power Failure Instructions:
Operation after loss of power--
1. Remove filter if provided
2. Do not expect to keep home at normal temperatures.
3. Do not load fuel above bottom of feed door.
15
2" MIN. AIR SPACE
REQUIRED BY CODE
18" MIN.
CENTRAL
FURNACE
Fig. 10

16
COLD AIR DUCT
6" PIPE
DAMPER
OPTIONAL
11 RPT
90 ELBOW
FURNACE
PIPE
CONNECTOR
Central Installation
Fig. 11
Add-On Installation
COLD AIR DUCT
6" PIPE
DAMPER
90 ELBOW
FURNACE
PIPE
CONNECTOR
EXISTING GAS/OIL/ELECTRIC FURNACE
8" PIPE
FIG. 11-B

ADJUSTINGBLOWERLIMITCONTROLSET-
TINGS
The temperature in the plenum of the warm air
furnaceatwhichtheblowerturnsonorturnsoff,
iscontrolled by the setting ofthe pointersin the
blower limit control. (See Fig. 12) These point-
ers may be adjusted to achieve the desired
warm air output from the furnace. (See Fig. 12
Below)
1. Movingbothpointerstowardtheright(counter
clockwise)-this increases the temperature set-
ting at which the blower will turn on and off.
2. Moving both pointers toward the left (clock-
wise)-thisdecreasesthetemperaturesettingat
which the blower will turn on and off.
3. Moving the pointers away from each other
willincrease the timethat theblower will runon
each warm air cycle.
Operating Instructions
FUEL, MODEL 1303
Hardwood, 18" to 26" should be split and air
dried (seasoned) for 6 months.
LIGHTING
1. Set the thermostat on "HIGH" for maximum
draft.
2. Open the feed door and place paper and
kindling on the grate for starting the fire.
3. Light fire and close feed door.
4. Add wood after fire is burning briskly. Be
careful not to smother the kindling fire.
5. Set thermostat for desired temperature.
"MEDIUM"settingis normallysatisfactory. Set
higher or lower for your comfort.
ADDING FUEL
Whenstarting afire, usesmall amountsof fuel.
This will allow for more complete combustion
and less buildup of tars or soot in the chimney.
1. SetthermostattoHIGHbeforeopeningfeed
door.
2. Wood Fire-Model 1303- Add wood to a
convenient level.
CAUTION!
DO NOT OPERATE WITH THE FEED AND/
OR ASH DOOR OPEN. THIS FURNACE IS
DESIGNED FOR THERMOSTATIC OPERA-
TION. OPERATION WITH ANY OF THESE
DOORSOPENWILLOVERHEATANDDAM-
AGE THE FURNACE.
CAUTION!
NEVER USE GASOLINE, GASOLINE-TYPE
LANTERN FUEL, KEROSENE, CHARCOAL
LIGHTERFLUID,OR FLAMMABLELIQUIDS
TO START OR "FRESHEN UP" A FIRE IN
THE FURNACE.
WARNING!
NEVER STORE FLAMMABLE LIQUIDS, ES-
PECIALLY GASOLINE, IN THE VICINITY OF
THE FURNACE.
17
BLOWER FAN
"OFF" POINTER
BLOWER FAN
"ON" POINTER
BLOWER LIMIT
POINTER & STOP
Fig. 12

Service Hints
Do not expect a furnace to draw. It is the
chimneythat creates thedraft. Smoke spillage
into the house or excessive buildup of water or
creosote in the chimney are warnings that the
chimneyisnotfunctioningproperly. Correctthe
problembeforeusingfurnace. Possiblecauses
are:
1. The connector pipe may be pushed into the
chimney too far, stopping the draft (Fig. 6)
2. Do not connect two furnaces or a stove and
furnace into the same chimney flue.
3. Thechimney used fora furnacemust not be
used to ventilate the cellar or basement. If
there is a cleanout opening at the base of
the chimney, it must be closed tightly.
4. If the chimney is operating too cool, water
will condense in the chimney and run back
intothe furnace. Creosoteformationwill be
rapid and may block the chimney. Operate
thefurnaceatahighenoughfiretokeepthe
chimney warm, preventing this condensa-
tion.
Ifthefireburnswell,butsometimessmokes
or burns slowly, it may be caused by the
chimney top being lower than another part
of the house or a nearby tree. The wind
blowing over a house or a tree, falls on top
of the chimney like water over a dam, beat-
ingdownthesmoke. Thetopofthechimney
should be at least 3 feet above the roof and
beatleast2feethigherthananypointofthe
roof within 10 feet (Fig. 5).
Seepage19 forlistoftroubleshootingtips.
5.
6.
A draft reading of .05 to .06 w.c. is suggested for proper burning of this unit when using
wood.
Chimney Maintenance
Creosote and Soot - 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 creo-
sote vapors condense in the relatively cool
chimneyflueofaslow-burningfire. Asaresult,
creosote residue accumulates on the flue lin-
ing. When ignited, this creosote makes an
extremely hot fire.
When coal is burned, the products of combus-
tion combine with moisture to form a soot resi-
duewhichaccumulatesonthefluelining. When
ignited, this soot makes an extremely hot fire.
Thechimneyshouldbeinspectedatleasttwice
monthly during the heating season to deter-
mineifacreosoteorsootbuilduphasoccurred.
If creosote or soot has accumulated, it should
beremovedtoreducetheriskofachimneyfire.
Chimney fires burn very hot. If the chimney
catches fire, immediately call the fire depart-
ment,thenreducethefirebyclosingtheinletair
control. Pour a large quantity of coarse salt,
baking soda or cool ashes on top of the fire in
thefirebox.
CAUTION
A chimney fire may cause ignition of
wallstudsorrafterswhichyouthought
wereasafedistance fromthe chimney.
If you have a chimney fire, have your
chimney inspected by a qualified per-
son before using again.
18

Trouble Shooting Tips for Warm Air Furnace
1. Smoking when feed door is
open.
2. Furnace does not heat.
3. Blower does not run.
4. No air from registers-
fan running.
5. Air from registers is not hot.
6. Blower runs too long.
7. Blower does not run long
enough.
8. Smoke and/or odor from
registers when furnace is
used for first time.
9. Creosote buildup.
10. Flame spillage when feed
door is open.
a) Insufficient Draft.
b) Clogged chimney or chimney
connector.
c) Down draft in chimney
a) Wood not seasoned and dry.
b) Blower control set too low.
c) Insufficient flue draft.
a) Improperly wired.
b) Bad blower control.
c) Bad relay.
d) Bad blower motor.
a) Registers are closed.
b) Duct work improperly installed.
c) Improper wiring between cen-
tral furnace and Model 1303.
a) Blower control is set too low.
b) Bad blower control.
a) Blower control cut-off set too
low.
a) Blower control cur-off set too
high.
b) Bad blower motor.
Oil from furnace and duct work.
a) Burning green wood(not
seasoned or dry).
b) Thermostat setting too low for
type fuel.
a) Insufficient draft.
b) Smothering fire when adding
fresh fuel.
a) Set thermostat higher.
b) Clean chimney.
c) Add raincap to chimney.
a)Allowwoodtoseasoninadry,
well ventilated area for 6 mo.
b) Set blower control to higher
temperatures.
c) Set flue draft. (See page 9)
a) Wire unit properly.
b) Replace blower control.
c) Replace relay.
d) Replace blower.
a) Open registers.
b)Correctductworkinstallations.
c) Wire unit properly.
a) Adjust blower control to
higher setting.
b) Replace blower control.
a) Set blower control cut-off
to higher setting.
a) Set blower control cut-off to
lower setting.
b) Replace blower.
The metal used in construction
ofthefurnace andductwork has
alightcoatingofoil. Thisshould
disappear after a short period of
time. Once this burn-off has oc-
curred, it should not reoccur.
a) Burn only seasoned wood.
b) Set thermostat higher to at-
tain higher flue temperatures.
a) Set thermostat higher.
b) Add fuel so as not to
smother fire.
LIST OF PROBLEMS POSSIBLE CAUSE SOLUTIONS
19

20
COLD AIR
RETURN
TO EXISTING
DUCT WORK
WARM AIR
EXISTING
FURNACE
MODEL 1303
FURNACE
FILTER BOX
APPENDIX
INSTALLATION A