USSC 1537M User manual

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Models:
1537M
1557M
OWNERS MANUAL
SOLID
FUEL
WARM AIR
FURNACE
CAUTION:
READ ALL INSTRUCTIONS CARE-
FULLY BEFORE STARTING THE
INSTALLATION OR OPERATING
THE FURNACE
IMPROPER INSTALLATION MAY VOID
YOUR WARRANTY
DO NOT USE THIS FURNACE
IN A MOBILE HOME OR TRAILER
UNITED STATES STOVE COMPANY
227 Industrial Park Road
P.O.Box 151
South Pittsburg, TN 37380
[phone]
• FOR PARALLEL INSTALLATION WITH EXISTING FORCED AIR-GAS OR OIL FIRED
FURNACE.
• FOR INSTALLATION AS A CENTRAL FURNACE
• THE HOTBLAST FURNACE HAS BEEN APPROVED FOR U.S. INSTALLATIONS ONLY.
851559E

2
NOTE: YOUR UNIT MUST BE INSTALLED BY A
QUALIFIED FURNACE INSTALLER.
You've purchased one of America's Finest Wood and Coal
Burning Furnaces. 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.
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
MATERIAL
6" Pipe, 6" Elbow, Collar and Thimble;
as required (24 gauge min.)
1/2" Sheet Metal Screws
6" Inside diameter UL Listed Residential
Type 103HT or Building Heating Appliance
Chimney or existing masonry chimney w/ Liner
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!
CLEANOUT OF THE HEAT EXCHANGER, FLUE PIPE, CHIMNEY, AND DRAFT
INDUCER (IF USED), IS ESPECIALLY IMPORTANT AT THE END OF THE
HEATING SEASON TO MINIMIZE CORROSION DURING THE SUMMER MONTHS,
CAUSED BY ACCUMULATED ASH.
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 substances in the furnace room.
CAUTION: HOT SURFACES
Keep children away.
Do not touch during operation.
CAUTION!
INSPECT FLUE PIPES, FLUE PIPE JOINTS AND FLUE PIPE SEALS REGULARLY
TO ENSURE THAT SMOKE AND FLUE GASES ARE NOT DRAWN INTO, AND
CIRCULATED BY, THE AIR CIRCULATION SYSTEM.
CAUTION LABELS
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.

4
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
prohibited by the National Fire Protection Association Code. This furnace requires a
masonry or UL Listed Factory Built Chimney for residential Type 103 HT or Building Heating
Appliance Chimney. Use a 6" diameter chimney or larger, that is high enough to give a good
draft. (See page 7)
5. Be sure that if a masonry chimney is used, it is safely constructed, lined 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 15).
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 "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. 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
combustible 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 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. 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 in not hot. DO NOT use any
acids or scouring soap, as these wear and dull the finish. DISCOLORATION WILL OCCUR
IF THE FURNACE IS OVERHEATED. 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 upflow-type central furnace, or it may be installed as a central
furnace.
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.

5
Your Hotblast Furnace is designed to
be a supplemental or central heating source
for your home. This Solid Fuel Furnace may
be installed in conjunction with a properly
operating central furnace that is listed or cer-
tified in accordance with nationally recog-
nized 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 name-
plate marking. The installation must be ac-
complished by a qualified agency (one who is
engaged in, and is responsible for, or is thor-
oughly familiar with the installation and op-
eration of the gas, oil, and solid fuel burning
heating appliances, who is experienced in
such work, familiar with all the requirements of
the authority having jurisdiction.) The instal-
lation shall be in strict accordance with the
manufacturer's installation instructions fur-
nished with the solid fuel furnace.
The chimney connector of the furnace is
to be installed to provide clearances to com-
bustible material not less than specified in the
individual classifications and marked on the
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 fur-
nace.
CENTRAL FURNACE INSTALLATION: As
a central furnace, the unit functions indepen-
dently of any other system. The blower will
come on when the plenum temperature
reaches the setting on the blower control.
PARALLEL INSTALLATION: (U.S. ONLY)
(See Optional Wiring Diagram, Page 13, Fig.
14) The design is such that when the blower
comes on, the blower on the central system
also comes on. The blower 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 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 ther-
mostat. When the temperature falls below the
setting on the wall thermostat, the forced draft
will come on (U.S. Stove Option 11/DKU)
The warm air supply outlet of the Hotblast
Furnace shall not be connected to the cold air
return of the central furnace, because the pos-
sibility exists of components of the central
furnace overheating and causing the central
furnace to operate other than is intended.
HOW THE FURNACE FUNCTIONS

6
DIMENSIONS OF FURNACE
FIGURE 1
1537M

7
LOCATING THE FURNACE
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 furnace and the
warm air outlet duct that is connected
directly to the warm air outlet plenum
of the central furnace. (See Fig. 2)
The unit will require installation with
the following clearances:
Unit to sidewall...............12"(305mm)
Unit to backwall............30"(760mm)
Chimney connector pipe to sidewall
.....................................21"(530mm)
Chimney connector pipe to backwall
.....................................18"(460mm)
Hot air ducts to combustibles
.......................................6"(150mm)
(Refer to Fig. 2 & 3)
Place the furnace on a noncombus-
tible floor.
Check figures 2 and 3. Be sure you
have the clearances shown from the
furnace and the connector 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.
2.
3.
4.
Figure 2
Figure 3

8
CHIMNEY CONNECTION
Fig. 4
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. See page 4, item 5. Look at Fig. 4. 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 chimney dealer. The installation must conform to local fire codes, 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.
Fig. 5
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.
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. 5).

9
RULES FOR CONNECTOR
PIPE INSTALLATION
1. The crimped end of the chimney connector fits
inside the furnace flue collar. Install additional chim-
ney connectors and elbow with the CRIMPED END
TOWARD THE FURNACE. This will allow any
condensation in the flue to run back into the furnace.
Use 6" dia. steel pipe and elbows for connection to
chimney. Never use less than 24 gauge and al-
though blued steel is satisfactory, high temp 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. The chimney connector may include a section for
a barometric draft regulator between the furnace and
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. When used in conjunction with a 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. Drill a hole in the chimney connector within 18" of
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. 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
Fig. 6
Fig. 7

10
ASSEMBLY OF FURNACE
Your furnace requires the following items
to be assembled or installed by the service
person:
Feed Door Pull Handle
Feed Door Locking Handle
Blower(s) and Blower Controls
Electrical Connections
Remove all parts from inside the furnace
and inspect for damage, including the
firebrick as some breakage could occur
during shipment.
Assemble the feed door pull handle as
shown in Figure 8.
Attach feed door locking handle as in
Figure 9 with screws and nuts provided.
Note: Slotted holes are for adjustment of
handle. Adjust handle until some pres-
sure is required to lock feed door during
firing sequence.
Install the thermodisc on rear of furnace
cabinet with the two screws provided.
Mount the conduit assembly from the junc-
tion box to the thermostat bracket. Crimp
the two female terminals to each of the
wire leads. Plug the wires to the
thermodisc. NOTE: It does not matter
which of the two wires plugs to which
terminal on the thermodisc.
Remove blowers from cartons. Remove
junction box cover. Attach clip nuts as
shown in figure 10. Install blowers and
gaskets with 1/4"-20 x 3/4 bolts as shown.
Wire right side blower first (See wiring
diagram, Fig. 11) and replace cover on
junction box on blower.
Wire left blower same as above and re-
place cover.
Check operation of shaker grates with
grate handle before operating furnace.
1.
2.
3.
4.
5.
6.
7.
8.
Fig. 10
Fig. 9
Fig. 8
Factory
Installed

11
FIGURE 11

12
INSTALLATION
Please see all methods of Installation in
Appendix at the rear of this booklet.
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-
ances for the specific model. Seal the smoke pipe
in 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 (to be purchased separately). (See Fig.
15) 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 Furnace.
See Wiring Diagram (Fig. 11). Remove the cover
from electrical junction box and connect power
supply wires to wires designated, using wire nuts.
The power cord supplied may be used for installa-
tion, if permitted by local codes and regulations.
If the power cord supplied cannot be used, the
power supply wiring must be 90 degrees centigrade
in a metal cable and should be completed by a
qualified installer complying with NFPA Standard
No. 70 and local codes.
This is a furnace, not a free standing stove.
You must direct heated air from 8" outlets away from
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
National Fire Protection Association installation
standards: No. 89M, 90B, 211, 70 (National Elec-
trical 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, Code for Installation of Gas &
Oil Equipment).
4. Have "Authority Having Jurisdiction" is to inspect
all chimneys and installations for adequate venting
and for compliance with standard and local codes
and regulations regarding installation of wood burn-
ing appliances.
5. Installation for Supplemental Heat Application to
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 practical
and avoiding unnecessary sharp turns in the smoke
pipe connector and the installation of devices 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: Pipe to combustible:
Front: 48" Sides: 21"
Back: 30" Back: 18"
Sides: 12"
Plenum to Ceiling: 6"

13
2" MIN. AIR SPACE
REQUIRED BY CODE
PLENUM TO CEILING
6" MIN.
CENTRAL FURNACE
PLENUM
Figure 12
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.

14
CAUTION
GASES THAT ARE DRIVEN FROM FRESH
COAL MUST BE BURNED OR THEY WILL
ACCUMULATE AND EXPLODE. NEVER
SMOTHER A FIRE WHEN ADDING FRESH
COAL.
CAUTION
DO NOT OPERATE WITH THE FEED AND/OR
ASH DOOR OPEN. THIS FURNACE IS DE-
SIGNED FOR THERMOSTATIC OPERATION.
OPERATION WITH ANY OF THESE DOORS
OPEN WILL OVERHEAT AND DAMAGE THE
FURNACE.
CAUTION
NEVER USE GASOLINE, GASOLINE-TYPE
LANTERN FUEL, KEROSENE, CHARCOAL
LIGHTER FLUID, OR FLAMMABLE LIQUIDS
TO START OR "FRESHEN UP" A FIRE IN THE
FURNACE.
WARNING
NEVER STORE FLAMMABLE LIQUIDS, ES-
PECIALLY GASOLINE, IN THE VICINITY OF
THE FURNACE.
OPERATING INSTRUCTIONS
FUEL, Model 1537M
A) Egg size (1-3/16" or larger) bituminous coal
for residential furnaces, or any of the specially
packed fireplace coals can be used. Coal with a
low ash content (2% to 6%) is recommended.
B) Hardwood, 18" to 26" should be split and air
dried (seasoned) for 6 months.
LIGHTING
1.
2.
3.
4.
5.
Set the thermostat on "HIGH" for maximum
draft.
Open the feed door and place paper and
kindling on the grate for starting the fire.
Light the fire and close the feed door.
Add wood or about 15 lbs. of coal (depending
on which model) after fire is burning briskly.
Set thermostat for desired temperature.
"MEDIUM" setting is normally satisfactory.
Set higher or lower for your comfort.
ADDING FUEL
When starting a fire, add small amounts of fuel
instead of adding large quantities of fuel. This will
give more complete combustion and less build-up
of tars or soot in the chimney.
Set thermostat to HIGH before opening feed
door.
Wood fire -
Add wood to a convenient level.
Coal Fire -
Never smother the fire when adding coal (See
Caution). Gas accumulation and a mild smoky
explosion will occur. Add fresh kindling if the
bed of coals has cooled.
Add up to 20 lbs. of coal per loading. Never
add coal above the bottom of feed door
opening.
Stir the coal and watch the fire. Be sure the
new coal is burning briskly before you close
the doors and turn the thermostat down.
Shake grates vigorously 1/2" left to right to spill
ashes into the ash pan. Do this at least once
every 12 hours of operation. Empty ash pan
regularly. Do not allow ashes to build-up to
grate as grate will warp and burnout, and you
might spill the ashes when removing the pan.
Dispose of hot ashes properly (See note 12 on
page 4).
Rotation of the handle (5 o'clock to 7 o'clock)
position will agitate coals and spill ashes into
ash pan.
It is advisable for you to get familiar with the
shaker grate operation before firing.
1.
2.
3.
a.
b.
c.
d.
e.
f.

15
SERVICE HINTS
Do not expect a furnace to draw. It is the
chimney that creates the draft. Smoke spillage
into the house or excessive build-up of water or
creosote in the chimney are warnings that the
chimney is not functioning properly. Correct the
problem before using furnace. Possible causes
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. 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, it must be closed tightly.
4. If the chimney is operating too cool, water
will condense in the chimney and run back
into the furnace. Creosote formation will be
rapid and may block the chimney. Operate
the furnace at a high enough fire to keep the
chimney warm, preventing this condensa-
tion.
If the fire burns well, but sometimes smokes
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,
beating down the smoke. The top of the
chimney should 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. 5).
See page 28 for list of trouble shooting tips.
5.
6.
A draft reading of .05 to .06 w.c. is suggested for proper burning of this unit when using
wood or bituminous coal as fuel. When using anthracite coal, this draft reading is a
minimum reading.
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
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.
When coal is burned, the products of
combustion combine with moisture to form a
soot residue which accumulates on the flue
lining. When ignited, this soot makes an
extremely hot fire.
The chimney should be inspected at least twice
monthly during the heating season to
determine if a creosote or soot build up has
occurred.
If creosote or soot has accumulated, it should
be removed to reduce the risk of a chimney fire.
Chimney fires burn very hot. If the chimney
catches fire, immediately call the fire de-
partment, then reduce the fire by closing the
inlet air control. Pour a large quantity of coarse
salt, baking soda or cool ashes on top of the fire
in the firebox.
CAUTION
A chimney fire may cause ignition of
wall studs or rafters which you thought
were a safe distance from the chimney.
If you have a chimney fire, have your
chimney inspected by a qualified per-
son before using again.

16
MODEL 1537M
REPAIR PARTS

17
PARTS LIST
MODEL 1537M
(SEE DIAGRAM, PAGE 16)
KEY PART # DESCRIPTION QTY.
1 23458G Cabinet Bottom 1
2 23461G Cabinet Side (Left & Right) 2
3 88032 Flue Collar Gasket 1
4 40246 Flue Collar 1
5 23459G Cabinet Back 1
6 23457G Cabinet Top 1
7 40258 Rear Liner 1
8 40269 Front Liner 1
9 23398 Baffle 1
10 40256 Shaker Grate Frame 2
11 40257 Shaker Grate 2
12 40260 Shaker Handle 1
13 23800 Smoke Curtain 1
14 83445 1/4-20 x 1-1/4 Carriage Bolt 2
15 23787 Smoke Curtain Clip 2
16 83250 1/4-20 Kep Nut 2
17 68218 Ash Door Assembly (Includes Door and Gasket) 1
18 23859B Draft Cap (Painted) 1
19 891098 Ash Door Handle 1
20 89574 Spring Handle 1
21 ***** Handle Bushing (Included with Handle) 1
22 23445 Door Latch 1
23 83461 Handle Washer 1
24 83178 3/8-16 Jamb Nut 1
25 22662 Feed Door Hinge Bracket 1
26 68217 Feed Door Assembly (Includes Door and Gasket) 1
- 69399 Damper Control Box Assembly (Includes the Following) 27 -34
27 69396 Control Plate Assembly 1
28 25200 Slide Damper - Secondary Air Control 1
29 89041 Spring 1
30 83278 #10 Flat Washer 3
. 31 83244 10-24 Kep Nut 2
32 25197G Control Box Cover (Painted) 1
33 25199G Pull Handle (Painted) 1
34 89943 Knob, Slide Damper 1
35 891097 Feed Door Handle Assembly 1
36 89574 Spring Handle 1
37 89066 Firebrick (4-1/2W x 9L x 1-1/4H) 12
38 68228 Ash Pan Weldment 1
39 22761 Flue Collar Ring 1
40 22762 Forced Draft Ring 1
41 68234 Blower Thermostat Bracket 1
42 80314 Thermodisc 60T12 1
43 22140 Relay Box Bracket 1
44 80131 Junction Box (4 x 4) 1
45 80231 Junction Box Cover 1
46 89319 Blower Gasket 2
47 80230 Blower Assembly 2
N/S 68231 Fan Control Cord Assembly 3
N/S = NOT SHOWN
FOR MODEL: 1537M

18
MODEL 1557M
REPAIR PARTS

19
PARTS LIST
MODEL 1557M
(SEE DIAGRAM, PAGE 18)
KEY PART # DESCRIPTION QTY.
1 69509 Firebox Weldment 1
2 25467G Cabinet Side (Left & Right) 2
3 88032 Flue Collar Gasket 1
4 40246 Flue Collar 1
5 23459G Cabinet Back 1
6 25466G Cabinet Top 1
7 40258 Rear Liner 1
8 40269 Front Liner 1
9 23398 Baffle 1
10 40256 Shaker Grate Frame 2
11 40257 Shaker Grate 2
12 40260 Shaker Handle 1
13 23800 Smoke Curtain 1
14 83445 1/4-20 x 1-1/4 Carriage Bolt 2
15 23787 Smoke Curtain Clip 2
16 83250 1/4-20 Kep Nut 2
17 68218 Ash Door Assembly (Includes Door and Gasket) 1
18 23859B Draft Cap (Painted) 1
19 891098 Ash Door Handle 1
20 89574 Spring Handle 1
21 ***** Handle Bushing (Included with Handle) 1
22 23445 Door Latch 1
23 83461 Handle Washer 1
24 83178 3/8-16 Jamb Nut 1
25 22662 Feed Door Hinge Bracket 1
26 68217 Feed Door Assembly (Includes Door and Gasket) 1
- 69511 Damper Control Box Assembly (Includes the Following) 27 - 34
27 69396 Control Plate Assembly 1
28 25200 Slide Damper - Secondary Air Control 1
29 89041 Spring 1
30 83278 #10 Flat Washer 3
. 31 83244 10-24 Kep Nut 2
32 25197G Control Box Cover (Painted) 1
33 25199G Pull Handle (Painted) 1
34 89943 Knob, Slide Damper 1
35 891097 Feed Door Handle Assembly 1
36 89574 Spring Handle 1
37 89066 Firebrick (4-1/2W x 9L x 1-1/4H) 12
38 68228 Ash Pan Weldment 1
39 22761 Flue Collar Ring 1
40 22762 Forced Draft Ring 1
41 68234 Blower Thermostat Bracket 1
42 80314 Thermodisc 60T12 1
43 22140 Relay Box Bracket 1
44 80131 Junction Box (4 x 4) 1
45 80231 Junction Box Cover 1
46 89319 Blower Gasket 2
47 80230 Blower Assembly 2
N/S 68231 Fan Control Cord Assembly 3
N/S = NOT SHOWN
FOR MODEL: 1557M

20