Vermont Castings The Aspen 1920 Mounting instructions

Homeowner’s
Installation
and Operating
Manual
For use in the
United States and Canada







30000369 8/13 Rev. 24
3069
aspen cover
2/10/00




2
Aspen®Woodburning Stove
30000369

Thank you for choosing a Vermont Castings Aspen to meet your heating needs. We’re condent you will nd the Aspen
to be an effective wood-burning heater incorporating modern, non-catalytic combustion technology with the classic aes-
thetic appeal of its Vermont Castings lineage.
The Aspen achieves high-efciency through precisely calibrated delivery of primary and secondary air into a refractory-
insulated rebox. Properly operated and maintained according to the guidelines in this manual, your Aspen will provide
safe, dependable, and economical heating for years to come.
The Aspen Model 1920 is listed by OMNI-Test Laboratories of Portland, Oregon. The test standards are ANSI/UL-1482
for the United States and ULC S627 for Canada.
The Aspen Model 1920 is listed for burning wood fuel only. Do not burn other fuels.
The Aspen Model 1920 is approved for installation in manufactured (mobile) homes in the United States only using the
optional Mobile Home Kit #1898 in accordance with the instructions in that kit and any local codes.
The Aspen Model 1920 complies with the standards set forth by the Federal Environmental Protection Agency, 40 CFR
Part 60.532(b)(2), as stated on the permanent label attached to each stove.
We recommend that you hire a professional, solid-fuel stove technician to install your Aspen, or to advise you on the
installation should you attempt to install it yourself. Consult the authority having local jurisdiction (such as a municipal
building department, re department, re prevention bureau, etc.) before installation to determine the need for a build-
ing permit. Also, consult your insurance agent to be sure your installation complies with specic requirements that may
vary locally.
In addition to directions on installation and operation, this manual includes directions on maintenance and assembly.
Please read this entire manual before you install or operate your new room heater.


Specications .....................................3
Installation Requirements ...................4
Clearances .........................................12
Assembly ...........................................15
Operation ............................................17
Maintenance .......................................21
Appendix - Draft Management............24
Replacement Parts .............................27
Warranty ............................................31
 Fuels used in gas, wood-
burning or oil red appliances, and the products of
combustion of such fuels, contain chemicals known to
the State of California to cause cancer, birth defects
and other reproductive harm.
California Health & Safety Code Sec. 25249.6

3
Aspen®Woodburning Stove
30000369


EPA Emissions rating ................ 4.3 (g/h, non-catalytic)*
Maximum heat output ........................... 18,000 Btu’s/hr.1
Area heated ........................ Up to 600 sq. ft. (56 sq. m)2
Fuel size/type ....................................... 16” (41 cm) logs
Loading ...................................................................Front
Chimney connector...................... 6” (152 mm) diameter
Chimney ue size ........................6” (152 mm) minimum
Flue exit position......................... Reversible, top or rear
Primary air .... Manually set, thermostatically maintained
Ash handling system ...................... Removable ash pan
Glass panel........................... High-temperature ceramic
Weight ..................................................240 lbs. (110 kg)
Width (Left leg - Right leg) ........................ 16” (406 mm)
Depth (Front leg - Rear leg)...................... 23” (584 mm)
Height to top of top exit ue collar ............ 24” (610 mm)
Height to top of rear exit ue collar ........... 21” (533 mm)
1 This value can vary depending on how the stove is oper-
ated, the type and moisture content of the fuel used, as
well as the design, construction and climatic location of
your home. Figures shown are based on maximum fuel
consumption obtained under laboratory conditions and on
average efciencies.
2 These values are based on operation in building code-
conforming homes under typical winter climate conditions
in New England. If your home is of nonstandard construc-
tion (e.g., unusually well insulated, not insulated, built
under ground, etc.) or if you live in a more severe or more
temperate climate, these gures may not apply. Since so
many variables affect performance, consult your Vermont
Castings authorized dealer to determine realistic expecta-
tions for your home.
15"
(381 mm)
24"
(610 mm)
Top Exit
Flue Collar
Height
16"
(406 mm)
2256O"
(570 mm)
756M"
(184 mm)
18"
(457 mm)
23"
(584 mm)
C
L
6"
(152 mm)
756O"
(191 mm)
3069
Aspen Specs
2/15/00 djt
2256M"
(565 mm)
 Aspen 1920 specications.
3069

4
Aspen®Woodburning Stove
30000369

Your stove must be connected either to a sound masonry
chimney that meets local codes, to a relined masonry
chimney that meets local codes, or to an approved pre-
fabricated metal chimney. Whichever of those types you
use, the chimney and chimney connector must be in good
condition and kept clean.
If you use an existing masonry chimney, it must be inspect-
ed to ensure safe condition before the stove is installed.
Your local professional chimney sweep, building inspector,
or re department ofcial will be able to make the inspection
or direct you to someone who can.
The chimney should extend at least 3’ (914 mm) above
the highest point where it passes through a roof, and at
least 2’ (610 mm) higher than any portion of a building
within 10’ (3 m).
To assure proper draft and good performance, any chim-
ney used with this stove should extend at least 16’ (4.9 m)
above the ue collar of the stove.
        
   





Before you begin an installation, review your plans to be
certain that:
• Your stove and chimney connector will be far enough
from combustible material to meet all clearance re-
quirements.
• The oor protector is large enough and is constructed
properly to meet all requirements.
• You have all necessary permits from local authorities.
Your local building ofcial is the nal authority for approv-
ing your installation as safe and determining that it meets
local and state codes.
The metal label permanently attached to the back of the
stove indicates that the Aspen has been tested to current
UL and ULC standards by Intertek Testing Services of
Middleton, Wisconsin. Clearance and installation informa-
tion is also printed on the label. Local authorities generally
will accept the label as evidence that, when the stove is
installed according to the information on the label and in
this manual, the installation meets codes and can be ap-
proved. Codes, however, vary in different areas. Before
starting the installation, review your plans with the local
building authority. Your local dealer can provide any ad-
ditional information needed.
For any unresolved questions about installation, refer
to the National Fire Protection Association’s publication
ANSI/NFPA 211–1988 Standard for Chimneys, Fireplaces,
Vents and Solid Fuel Burning Appliances. In Canada, the
equivalent publication is CSA CAN-B365, Installation Code
for Solid Fuel Burning Appliances and Equipment. These
standards are the bases for many national codes. They
are nationally recognized and are accepted by most local
authorities. Your local dealer or your local building ofcial
may have a copy of these regulations.
       

        
  



An existing masonry chimney must be inspected to conrm
that it has a lining. Do not use an unlined chimney. The
chimney also should be examined for cracks, loose mor-
tar, other signs of deterioration, and blockage. Repair any
defects before the chimney is used with your stove.
2' Min.
2' Min.
3'
Min.
0 To 10'
3'
Min.
0 To 10'
AC617
RLTSKC8
2/11/98

 The 2’-3’-10’ Chimney Rule.
Reference Point AC617
ST241
chimney types
12/13/99 djt
Standard Chimney Types
A prefabricated double-
wall insulated chimney
A tile-lined
masonry
chimney
ST241

5
Aspen®Woodburning Stove
30000369

• Unused openings in an existing masonry chimney must
be sealed with masonry to the thickness of the chimney
wall, and the chimney liner should be repaired. Open-
ings sealed with pie plates or wallpaper are a hazard
and should be sealed with mortar or refractory cement.
In the event of a chimney re, ames and smoke may
be forced out of these unused thimbles.
• The chimney should be thoroughly cleaned before
use.
• A newly-built masonry chimney must conform to the
standards of local building code, or, in the absence of
a local code, to a recognized national code. Masonry
chimneys must be lined, either with code-approved
masonry or precast refractory tiles, stainless steel pipe,
or a code-approved, “poured-in-place” liner. The chim-
ney clean-out door must seal tightly to ensure a good
draft.

A prefabricated metal chimney must be one that is tested
and listed for use with solid-fuel burning appliances to the
High-Temperature (H.T.) Chimney Standard UL-103-1985
(2100°F.) for the United States, and High Temperature
(650°C) Standard ULC S-629 for Canada.

This stove is approved for venting into a masonry chimney
with a nominal ue size of 8” x 8” (203 x 203 mm), and into
a round ue size of 8” (203 mm) or 6” (152 mm).
It may be vented into larger chimneys as well. However,
chimneys with liners larger than 8” x 12” (203 x 305 mm)
may experience rapid cooling of smoke and reduction in
draft, especially if they are located outside the home. Such
large chimneys may need to be insulated or have the ue
relined for proper stove performance.
Ask your dealer about components available for connecting
the stove to a steel chimney liner.

A chimney connector is the double-wall or single-wall pipe
that connects the stove to the chimney. The chimney it-
self is a masonry or prefabricated structure that encloses
the ue. Chimney connectors are used only to make the
connection from the stove to the chimney. They are for
interior use only.
Double-wall connectors must be tested and listed for use
with solid-fuel burning appliances. Single-wall connectors
should be made of 24 gauge or heavier steel, and should be
6” (152 mm) in diameter. Do not use galvanized chimney
connector; it cannot withstand the high temperatures that
can be reached by smoke and exhaust gases, and may
release toxic fumes under high heat.
If possible, do not pass the chimney connector through
a combustible wall or ceiling. If passage through a com-
bustible wall is unavoidable, refer to the recommendations
in the section following on
Wall Pass-throughs. Do
not pass the connector
through an attic, a closet
or any similar concealed
space. The whole chim-
ney connector should be
exposed and accessible
for inspection and clean-
ing.
Install the single wall chim-
ney connector not less
than 18” (457 mm) from
the ceiling. Keep it as
short and direct as possible, with no more than two 90
degree turns. If possible, use 45° elbows. Slope horizontal
runs of connectors upward 1/4” per foot (20 mm per meter)
going from the stove toward the chimney. The recom-
mended maximum length of a horizontal run is 3’ (914
mm), and the total length of chimney connector should be
no longer than 8’ (2.5 meters).
In cathedral ceiling installations, extend the prefabricated
chimney downward to within 8 feet (2.4m) of the stove.
      



The Aspen is approved for installation in the U.S. and
Canada with double-wall chimney connectors that have
been tested and listed for use with solid-fuel burning ap-
pliances by a recognized testing laboratory.
Follow the instructions for assembling and installing
double-wall connectors provided by the manufacturer of
the double-wall chimney. To ease assembly and help as-
sure safety, use chimney components manufactured by a
single source.
ST242
Chimney connector
12/13/99 djt
Flue gas
direction
Toward
stove
Chimney connector.












6
Aspen®Woodburning Stove
30000369
ST243
thinble connection
12/13/99 djt




• Beginning at the ue collar of the stove, assemble the
chimney connector. Insert the rst crimped end into the
stove’s ue collar, and keep each crimped end pointing
toward the stove. Using the holes in the ue collar as
guides, drill 1/8” (3 mm) holes in the bottom of the rst
section of chimney connector and secure it to the ue
collar with three #10 x 1/2” sheet metal screws.
• Secure each joint between sections of chimney con-
nector, including telescoping joints, with at least three
sheet metal screws. The predrilled holes in the top of
each section of chimney connector serve as guides
when you drill 1/8” (3 mm) holes in the bottom of the
next section.
• Secure the chimney connector to the chimney. Instruc-
tions for various installations follow.
• Be sure the installed stove and chimney connector are
correct distances from nearby combustible material.
 Special slip pipes and thimble sleeves that form
telescoping joints between sections of chimney connector
are available to simplify assembly. Slip pipes eliminate the
need to cut individual connector sections. Consult your
local dealer about these special connector sections.


Follow the installation instructions of the chimney manu-
facturer exactly.
Special adapters are available from your local dealer to
make the connection between the prefabricated chimney
and the chimney connector. The top of such adapters
attach directly to the chimney or to the chimney’s ceiling
support package. The bottom of the adapter is secured to
the chimney connector.
The adapter forms a union between the chimney and
chimney connector that ensures any soot or creosote fall-
ing from the inner walls of the chimney will stay inside the
chimney connector.


The Aspen may be connected to either a freestanding
masonry chimney or to a replace masonry chimney.

If the chimney connector must pass through a combustible
wall to reach the chimney, follow the recommendations for
Wall Pass-Through construction on pages 7-8.
The opening through the chimney wall to the ue - the
“breech” – must be lined with a ceramic or metal thimble
which is securely cemented in place.
A metal pipe section called the “thimble sleeve,” slightly
smaller in diameter than standard connector and the
thimbles, will allow the removal of the chimney connector
system for inspection and cleaning. Thimble sleeves are
available from your local dealer.
To install a thimble sleeve, slide it into the breech until it
is ush with the inner ue wall. Be sure that it does not
extend into the ue passage where it could interfere with
the draft.
The thimble sleeve should protrude 1-2” (25-50 mm) into
the room. Use furnace cement and thin gasketing to seal
the sleeve in place in the thimble. Secure the chimney
connector to the outer end of the sleeve with sheet metal
screws.

In this installation, the chimney connector enters the re-
place ue though a thimble located above the replace.
The liner of the replace chimney should extend at least
to the point at which the chimney connector enters the
chimney. Follow all the guidelines for installing a chimney
connector into a freestanding masonry chimney, and pay
special attention to these additional points:
• Check the stove and chimney connector clearances to
combustible mantel and trim materials. If necessary,
use a combination of mantel, trim, and connector heat
shields to provide the required clearances.
• Double-check connector clearance to the ceiling.
• The replace damper must be closed and sealed to pre-
vent room air from being drawn up the ue which could
reduce performance. However, it must be possible to
reopen the damper to inspect or clean the chimney.
Chimney
Connector
Thimble Sleeve
 The thimble, made of either ceramic or metal, must be
cemented securely in place.
Flue
Keep sleeve
end ush with
ue tile
ST243

7
Aspen®Woodburning Stove
30000369

If your replace opening height is at least 21¹⁄₂" (546 mm),
you may install a stove through the opening using a “posi-
tive connection” kit available from your local dealer. These
kits provide a secure connection between the stove ue
collar and the chimney ue.
Conrm that the stove location is within the required clear-
ance specications for the mantel and surrounding replace
trim. Refer to Page 12.
Floor protection requirements also apply to replace instal-
lations. Refer to Page 9.

Whenever possible, design the installation so that the
connector does not pass through a combustible wall. If
you must include a wall pass-through in your installation,
check with your building inspector before you begin. Also
check with the chimney connector manufacturer for any
specic requirements.
Consult with your dealer regarding special connection
components available for use as wall pass-throughs. Use
only parts that have been tested and listed for use as a
wall pass-through.
ST244
Plymouth
fplc over mantel
12/99
  If the clearance between the chimney connector and
either the ceiling or the mantel is inadequate, a protective heat
shield is required.



Mantel
Chimney Connector
Heat Shield
ST244



ST245
fireplace 
flex connector
12/99
 Special adapter kits are available from your local dealer
to simplify replace installations.


16”US
18” (460 mm)Canada
Flex Connector
Fireplace
Adapter w/
Clean-out Tee
Min. 15”
(381mm)


ST245


The National Fire Protection Association (NFPA) has estab-
lished guidelines for use in the United States for passing
chimney connectors through combustible walls. Many
building code inspectors follow these guidelines.
Figure 9 shows one NFPA-approved method. All combus-
tible material in the wall is cut away to provide 12” (305 mm)
clearance to the connector. Brick and mortar are used to
enclose the clearance area.
ST272
masonry wall pass through
w/ single wall
connector
12/99
Min. 2” (51mm) Chimney clear-
ance to brick and combustibles
 = Minimum 12” (305 mm) brick con-
struction between liner and combustible
framing materials
Min. 12”
(305 mm)
Fire clay
liner


Chimney Flue
Fire clay liner
Masonry
Chimney
constructed
to NFPA 211
 Masonry Wall Pass-through with single wall chimney
connector.
Chimney
connector
ST272

8
Aspen®Woodburning Stove
30000369
ST275
wall with
ventilated
steel thimble
 Wall Pass-through with ventilated steel thimble.
24 ga. Sheet
Steel Supports
24 ga. Sheet
Steel Supports
2” (51mm) Min.
Chimney clearance to sheet steel
supports and combustibles
2” (51mm)
Min.
Chimney Flue
2” (51mm) Min.
air space
Prefab Chim-
ney
Section
Prefab
Chimney
Section
Chimney Con-
nector
Masonry Chimney con-
structed to NFPA 211
ST275

• Using a section of double-wall chimney with a 9” (229
mm) clearance to combustibles. (Fig. 10)
• Placing a chimney connector pipe inside a steel double-
wall ventilated thimble, which is then separated from
combustibles by 6” (152 mm) of berglass insulating
material. (Fig. 11)
• Placing a chimney connector pipe inside a section of 9”
(229 mm) diameter, solid-insulated, factory-built chim-
ney, with two inches of air space between the chimney
section and combustibles. (Fig. 12)
ST274
single wall 
w/ventilated thimble
12/99
 Wall Pass-through using single wall chimney connector
with a ventilated steel thimble.
Min. 6”
(152mm)
Chimney clearance to sheet steel
supports and combustibles 2” (51mm) Min.
Glass Fiber
Insulation
Chimney Connector
Chimney Flue

with two 1” (25mm)
Ventilated Chan-
nels
Masonry Chimney con-
structed to NFPA 211
24 ga.Sheet
Steel Supports
ST274
ST276
CSA approved wall 
pass-through
12/99
 CSA approved Wall Pass-through.
24 ga.Sheet
Steel Support
24 ga. Sheet
Steel Support
(one side only)
Min. 18”
(460mm)
Chimney clearance to sheet steel
supports and combustibles 2” (51mm)
Min.
Chimney Flue
Chimney
Connector
Masonry Chimney constructed
to CAN/CSA-B365
Min. 18”
(460mm)
ST276
ST273
nfpa 
factory built insulated
chimney section
12/99
 Wall Pass-through using factory-built insulated
chimney section.
Min. 9”
(230mm)
Air Space
Min. 9”
230mm
Chimney Flue
Sheet Steel
Supports
Min. 2”
(51mm)
Non-soluble re-
fractory cement
Solid insulated,
listed factory-
built chimney
length set ush
with ue
Chimney
Connector
Masonry
Chimney
constructed to
NFPA 211
24 ga.Sheet
Steel Sup-
ports
ST273

In Canada, the Canadian Standards Association has es-
tablished specic guidelines regarding wall pass-though
design. Figure 13 shows one approved method in which
all combustible material in the wall is cut away to provide
the required 18” (457 mm) clearance around the connector.
The resulting space must remain empty. A ush-mounted
sheet metal cover may be used on one side only. If covers
must be used on both sides, each cover must be mounted
on noncombustible spacers at least 1” (25 mm) clear of
the wall. Your local dealer or your local building inspector
can provide details of other approved methods of passing
a chimney connector through a combustible wall.
In Canada, this type of installation must conform to
CAN/CSA-B365, Installation Code for Solid Fuel Burning
Appliances and Equipment.

A tremendous amount of heat radiates from the bottom
plate of your Aspen. The oor area directly under and
around the stove will require protection from radiant heat
as well as from stray sparks or embers that may escape
the rebox.
Heat protection is provided through the use of a Bottom
Heat Shield #1895. Spark and ember protection must be
provided by a oor protector constructed with noncombus-
tible material as specied.
Most installations will require that the bottom heat shield be
attached. Only when the stove is placed on a completely
noncombustible surface such as unpainted concrete over
earth may it be used without the heat shield.
Even when the bottom heat shield is installed, you must
provide special protection to the oor beneath. For instal-
lations with the heat shield attached, use a noncombustible
oor protector such as 1/4” nonasbestos mineral board or
equivalent, or 24 gauge sheet metal. The oor protector
may be covered with a noncombustible decorative material
if desired. Do not obstruct the space under the heater.

9
Aspen®Woodburning Stove
30000369
Protection requirements vary somewhat between the
United States and Canada as follows:
U.S. Installations: The oor protector is required under the
stove and must extend at least 16” from the front of the
stove (B, Fig. 14), and at least 6” from the sides and rear
(A, Fig. 14). It must also extend under the chimney con-
nector and 2” to either side. (C, Fig. 14)
In Canada: A noncombustible oor protector is required
under the heater. The oor protector must extend 18” (457
mm) to the front (B, Fig. 14) and 8” (203 mm) from the sides
and rear. (A, Fig. 14)
C
A
B
A
A
A
A
B
A
E E
D
ST246
floor protection
12/99
 These dimensions are minimum requirements only. Use
greater dimensions whenever possible.

A: 6” 8“ (203 mm)
B: 16” 18” (457 mm)
C: 10” 10” (254 mm)
D: 44” 48” (1219 mm)
E: 27” 31” (787 mm)
  
ST246
ST247
Rear exit floor dgrm
12/14/99 djt
 Supporting timbers under replace hearths are
considered to be combustible.
Wood framing
requires protection
from radiant heat
ST247

Do not assume that your replace hearth is completely
noncombustible. Many replace hearths do not satisfy the
“completely noncombustible” requirement because the
brick or concrete in front of the replace opening is sup-
ported by heavy wood framing. Because heat is readily
conducted by brick or concrete, it can easily pass through
to the wood. As a result, such replace hearths can be a
re hazard and are considered a combustible oor.
For all replace installations, follow the oor protection
guidelines described above.
Keep in mind that many raised hearths will extend less than
the required clearance from the front of the heater when
it is installed. In such cases, sufcient oor protection as
described above must be added in front of the hearth to
satisfy the minimum oor protector requirement from the
front of the stove: 16” (406 mm) from the front in the United
States and 18” (457 mm) from the front in Canada.
Hearth rugs do not satisfy the requirements for oor protec-
tion as they are only re-retardant, not re proof.
Fireplace installations also have special clearance require-
ments to the side walls, side decorative trim and replace
mantel. Refer to the information on replace and mantel
trim shields in this section.

10
Aspen®Woodburning Stove
30000369


When the stove is operating, both the stoveplate and the
chimney connector radiate heat in all directions. A safe
installation requires that adequate clearance be maintained
between the stove and nearby combustible materials to
ensure that those materials do not overheat.
Clearance is the distance between either your stove or
chimney connector, and nearby walls, oors, the ceiling,
and any other xed combustible surface. 
      
 In general, a distance of 48” (1219
mm) must be maintained between the stove and move-
able combustible items such as drying clothes, furniture,
newspapers, rewood, etc. Keep this area empty of any
combustible material.

The Aspen clearance requirements, listed and diagramed
on pages 10-11, have been established through testing to
UL and ULC standards to meet most installation congura-
tions. These involve four basic variables:
• When the stove has no listed heat shield installed.
• When the stove does have a listed heat shield
mounted on it.
• When the wall has no listed heat shield installed.
• When the wall does have a listed heat shield mount-
ed on it.
In general, the greatest clearance is required when the
stove will be positioned with no heat shield near a wall
with no heat shield. The least clearance is required when
both the stove and the wall have heat shields. Reducing
a stove clearance may require installation of a listed heat
shield on the chimney connector as well.
Clearances may be reduced only by means approved by
the regulatory authority, or in accordance with the clear-
ances listed in this manual.
When determining clearance, always measure from the top
plate of the stove, or, from the chimney connector itself, to
the adjacent combustible surface. Do not measure from
the heat shields of the stove or connector to the combus-
tible surface.

The Aspen is approved for use in manufactured (mobile)
homes when installed with the optional Mobile Home Kit
#1898 in accordance with the instructions provided with
that kit and any local codes. This approval applies only in
the United States.
In addition to the standard installation requirements de-
scribed in this manual, the following guidelines apply to
mobile home installations:
1. The stove must be permanently secured to the oor
using the leg clamps and fasteners provided in the kit.
2. The stove must have a permanent connection to the
outside to supply combustion air.
3. The stove must be grounded to the steel chassis of the
mobile home.
4. A listed chimney system, including roof thimble, spark
arrestor, chimney supports, roof ashing and any other
components suitable for use in mobile homes must be
used. The chimney system must comply with the stan-
dard for Chimneys Factory-Built Residential Type and
Building Heating Appliances UL 103.
5. The chimney must be attached directly to the stove and
must extend at least 3’ (914mm( above the part of the
roof through which it passes. The top of the chimney
must extend at least 2’ (610 mm) above the highest
point of any part of the mobile home structure within
10’ (3 m) of the chimney.
6. If the chimney exits the mobile home through a wall at a
point 7 feet or less above the ground level on which the
mobile home is located, a guard or other noncombustible
enclosure must be tted at the point of exit and extend
up to a height of 7’ (2.1 m). Any openings in this guard
must be smaller than 3/4” (19 mm).
7. Check all local building codes, specically those related
to mobile homes. Other requirements may be applicable
to chimney system removal for transportation of the
mobile home.





11
Aspen®Woodburning Stove
30000369

Wall shields should be constructed of 24 gauge or heavier
sheet metal, or another noncombustible material such as
1/2” (13 mm) insulation board or common brick “laid on
at,” with the 3¹⁄₂" (90mm) side down.
Shields must be spaced out from the combustible surface 1"
(25 mm) on noncombustible spacers. The spacers should
not be directly behind the stove or chimney connector.
Air must be able to ow between the wall and the shield.
At least 50% of the bottom 1" (25 mm) of the shield should
be open and the shield must be open at the top.
The following examples of wall shield construction illustrate
common designs used to safely achieve reduced clearances
to combustible wall materials.

 Fig. 17: Reduced clearances for both rear
and side walls. Wall shields may meet at corner if desired.
Shielding for connector is centered behind connector.

 Fig. 18: Reduced clearances for both rear
and side walls. Wall shields may meet at corner if desired.
Shielding for connector is centered behind connector. Wall
pass-through must comply with codes.
     
  Fig. 19: Reduced side clearances. Wall
shields MUST meet at corner.
ST248
wall shield construction
12/14/99 djt
 Approved Wall shield construction
Air ow
Wall shield
Air ow
Stud wall
framing
Noncombus-
tible spacers
and fasteners
Drywall
Screen
Metal Spacer
Shield
ST248
 Parallel installation, vertical chimney connector, two
wall shields.
1”
(25mm)
1”
(25mm)
40”
(1016mm)
40”
(1016mm)
36”
(914mm)
36”
(914mm)
ST249
parallel vertical wall shield
12/14/99 djt
ST249a
 Corner installation, vertical chimney connector, two
wall shields.
1”
(25mm)
1”
(25mm)
40”
(1020mm)
40”
(1020mm)
36”
(914mm) 36”
(914mm)
ST251a
corner install
vertical
12/14/99 djt
ST251a
ST250a
 Parallel installation with rear wall pass-through, two
wall shields.
1”
(25mm)
1”
(25mm)
41”
(1016mm)
41”
(1016mm)
36”
(914mm)
13”
(330mm)
ST250
parallel rear wall
12/14/99 djt

12
Aspen®Woodburning Stove
30000369
ST252a
mantel clrncs
12/14/99 djt

= 9” (229 mm) Max.
= 22¹⁄₂" (572 mm) Min.
= 7¹⁄₂" (191 mm) Max.
= 21” (533 mm) Min.
= 6” (152 mm) Max.
= 19¹⁄₂" (495 mm) Min.
= 4¹⁄₂" (114 mm) Max.
= 18” (457 mm) Min.
= 3” (76 mm) Max.
= 16¹⁄₂" (419 mm) Min.
= 1¹⁄₂" (38 mm) Max.
= 15” (381 mm) Min.
Min. 15”
(381mm)
1¹/₂"
(38mm)
Max. 9”
(229mm)
22¹/₂"
(572mm)


ST252a

A replace installation requires special clearance between
the side of the stove and the right and left walls, the side
of the stove and the decorative side trim on the replace
face, and the top of the stove and the mantel.
Maximum Mantel depth (A, Fig. 20) of a combustible mantel
is 9” (230 mm). At that depth, the clearance to the stove top
(B) must be a minimum of 22¹⁄₂" (572 mm).
Top Trim (C) protruding less than 1¹⁄₂" (38 mm) from the
face of the replace must be a minimum of 12" (305 mm)
from the stove top. This clearance may not be reduced by
shielding.
For every 1¹⁄₂" (38 mm) increment that the trim or mantel
extends in depth, the clearance from the stove top must
also be increased by 1¹⁄₂" (38 mm).
Side Trim must have a minimum clearance of 8" (203 mm),
measured from the stove's top edge. (D, Fig. 20)

The Aspen is approved for installation into an alcove con-
structed to maintain the clearances diagramed in Figure
21.
 Mantel and trim clearances.
 Mantel 22¹⁄₂" (572 mm)
 Top Trim* 12” (305 mm)
 Side Trim 8” (203 mm)
* material is less than 1¹⁄₂" (38 mm) thick
ST253a 
aspen
trim clearances
12/15/99 djt




ST253a
ST254
alcove clearances
12/99
 Alcove Specications.
Unprotected
Surfaces
Protected
Surfaces
(NFPA 211)

Min. Width

Max. Depth

Ceiling Above
Stovetop
62”
158 cm
46”
117 cm
48”
122 cm
48”
122 cm
36”
92 cm
18”
46 cm



ST254

13
Aspen®Woodburning Stove
30000369

Use the chart below together with the diagrams on the next page to determine the required clearance for your particu-
lar installation.
Stove clearances are measured from the top plate to the combustible surface.
Chimney connector clearances are measured from the connector surface and take into account ue collar offset.
** A distance of 48” must be maintained between the stove and moveable combustible items such as drying clothes, furni-
ture, rewood, etc.
1 When a rear heat shield is installed on a top exit stove, the shield insert must be attached to the shield so the area behind
the ue collar on the stove is protected.
2 Chimney connector heat shields must extend exactly 24” (610 mm) above the top of the stove. No shielding can be used on
the connector above 24” (610 mm). The unshielded chimney connector above the 24” (610 mm) point must be 13” (330 mm)
from an unprotected wall.
3 In top exit installations, this clearance requires the use of the rear stove heat shield with the ue collar cover plate installed.
  
  
    
      
No Heat Shields (A) 24” (B) 13” (C) 13” (D) 16” (E) 9” (F) 8”
(610 mm) (330 mm) (330 mm) (406 mm) (230 mm) (203 mm)
Top Exit, Rear Heat (G) 24” (H) 11” (I) 13” (J) 16” (K) 9” (L) 8”
Shield ONLY1 (610 mm) (179 mm) (330 mm) (406 mm) (230 mm) (203 mm)
Rear Exit, Rear Heat (M) 24” (N) 11” N/A (O) 16” (P) 9” N/A
Shield ONLY (610 mm) (179 mm) (406 mm) (230 mm)
Top Exit, Rear H.S., Single- (Q) 24” (R) 9” (S) 13” (T) 16” (U) 9” (V) 8”
wall, connector shields1,2 (610 mm) (229 mm) (330 mm) (406 mm) (230 mm) (203 mm)
Top Exit, Rear H.S., Double- (Q) 24” (R) 7” (S) 13” (T) 16” (U) 7” (V) 8”
wall connector shields 1,3 (610 mm) (178 mm) (330 mm) (406 mm) (178 mm) (203 mm)
  
No Heat Shields 15” (381 mm) 11” ( 279 mm)
Using Connector Heat Shields2 13” (330 mm) 6” (152 mm)
Double Wall Connector3 6” (152 mm) 6” (152 mm)
 
Single Wall Connector 18” (457 mm) 11” (279 mm)
Double Wall Connector 6” (152 mm) 6” (152 mm)
     
  48” (1219 mm)

14
Aspen®Woodburning Stove
30000369
ST255
exit diagram
12/15/99 djt








 



















 
  

 






15
Aspen®Woodburning Stove
30000369
ST257
install ashlip
12/99
1/4-20 x ⁵/₈” hex head
screws with washers
 Attach the Ashlip to the bottom plate.
ST257
2. Locate the hex bolt (Fig. 23) located in the center rear
edge of the stove bottom plate. Loosen this bolt just
enough to engage the Adapter clevis tab under the
washer and then retighten.
You will need the following tools to assemble the Aspen:
• 9/16” open end wrench • safety glasses & gloves
• at head screwdriver • power drill w/ 1/8” (3mm) bit
• stub handle phillips screwdriver
• 7/16” open end wrench (for Ashlip & Outside Air Adapt-
er)

1. Remove the shipping straps and plastic wrap.
2. Inspect the stove and contents for shipping damage
or missing parts. Immediately notify your dealer of any
damage. Do not install this stove if any damage is evi-
dent or any parts are missing.

• Stove Legs, 4
• Hex Head Leg bolts with washers, 4
• #10 x 1/2” sheet metal screws, 3
• Owner’s Registration Card
• Touch-up Paint (Porcelain enamel stoves only)

Leg installation will be accomplished most easily with the
help of an assistant who can tilt the stove onto its side while
you attach the legs.
1. With your assistant holding the stove up on its side,
remove the slotted screws from the leg mounting holes
at each corner of the stove bottom.
2. Install two legs, using the hex head bolts with washers
from the parts bag. The shoulder of the legs should
seat within the locator bosses cast into the stove bot-
tom at each corner. (Fig. 22) Tighten the bolts with the
wrench. 

3. With your assistant, lift the stove up onto its legs and
hold it in a tilted position to install the remaining two legs
with washers and hex bolts.

Use a 7/16” wrench to secure the Ashlip to the stove bottom
with two, 1/4-20 x 5/8” hex head screws and washers found
in the holes used to attach the ashlip. (Fig. 23)

The optional #1897 Outside Air Adapter provides a collar to
which a 3 inch diameter air duct may be attached directly
to the air inlet area at the back of the stove. The adapter
should be attached to the stove before a bottom or rear
heat shield is installed.
1. Remove the phillips head screw located just above the
primary air inlet at the back of the stove.
ST256
attach legs
12/15/99 djt
Carefully tilt the stove
on the pallet to install
rst one front and one
rear leg.
Then tilt the stove up on
those legs to install the
remaining two.
ST256
 Install legs on one side of stove then the other.

ST258
install outside
adapter
12/15/99 djt
 Attach the adapter to the bottom plate.
Loosen Hex Bolt
Adapter
ST258

16
Aspen®Woodburning Stove
30000369

The #1896 Rear Heat Shield reects radiant heat away
from combustible materials located behind the stove. Its
use enables you to install the stove at a reduced clearance
to combustible materials in accordance with the specica-
tions in this manual.
1. Remove the three phillips head screws from the back of
the stove. The upper right screw also serves to secure
the thermostat cover to the stove. (Fig. 26)
2. Thread the three 1¹⁄₄" spacers provided with the heat
shield kit into the holes. Be sure to re-secure the thermo-
stat cover using a spacer at that location. If the Outside
Air Adapter is used, secure its upper ange to the hole
above the primary air inlet using a spacer instead of the
screw. Hand tighten the spacers.
3. Align the holes in the heat shield with the spacers and
secure the shield to the spacers using the three philips
head screws previously removed. Tighten rmly with a
screwdriver.

The #1985 Bottom Heat Shield must be used in the U.S.
and Canada in any installation on a oor that is not com-
posed of unpainted cement on earth.
1. Remove the 1/4-20x 3/8” phillips screw from the central
mounting boss in the stove bottom. (Fig. 27)
2. Mount the bottom heat shield to the stove bottom using
the same phillips head screw previously removed. The
shield will butt against the cast bosses in the bottom of
the ashlip at the front of the stove.

If a rear exit chimney connection is required, you will need
to remove the ue collar from the stove top and move it to
the back of the stove. (Fig. 25)
1. Use a phillips screwdriver to remove the two screws and
rear cover plate from the back of the stove.
2. Remove the ue collar by removal of the two phillips
screws from the top of the stove.
3. Attach the cover plate to the stove top. Be sure to keep
the gasket in place.
4. Secure the ue collar to the back of the stove.
5. Insert the crimped end of the rst section of chimney
connector into the ue collar. Using the holes in the
collar as guides, drill 1/8” (3mm) holes through the
connector pipe. Use the three #10 x 1/2” sheet metal
screws provided to secure the chimney connection to
the ue collar.
3. If you are not installing a Rear Heat Shield, use the
phillips head screw to secure the upper ange of the
Adapter to the stove at the hole from which the screw
was removed in Step 1. (Fig. 24) Otherwise, a heat
shield spacer will be used here. (See “Install the Rear
Heat Shield”, below.)
ST261
install bottom heat shield
12/99
 Install the bottom heat shield.
ST261
ST260
install rear
heat shield
12/99
 Install the rear heat shield.
Spacers
Spacer
ST260
 Reversing the ue collar.
ST258
flue collar reversal
12/99
ST259

17
Aspen®Woodburning Stove
30000369

Combustion control is achieved in the Aspen through two
separate air delivery systems.
The , located at the left rear cor-
ner of the stove, controls the amount of incoming primary
air for starting, maintaining, and reviving the re. More air
entering the stove makes the re burn hotter and faster,
while less air prolongs the burn at a lower heat level.
For the greatest air supply and maximum heat output (but
the shortest burn time), move the lever to the straight up
(12 o’clock) position. For a re that will last longer with
less heat, move the lever to the right. You can set the lever
anywhere in between the left and right extremes.
The Aspen features an automatic thermostat to ensure
an even heat output at any manual setting you select. As
the fuel burns, the thermostat reacts to the heat radiating
from the stove surface and, consequently, adjusts the air
shutter attached to it . As the re intensity (and heat output)
builds, the thermostat slowly closes the air shutter, thereby
restricting incoming combustion air. As the re intensity then
wanes (and heat output lessens), the thermostat responds
and gradually opens the air shutter which allows more
combustion air to again enliven the re. This ebb and ow
action functions continuously to prolong the burn cycle until
the fuelbed is exhausted.
Another separate supply of oxygen is delivered to the upper
area of the rebox to support combustion of gases released
from the main fuel bed. This  enters the
stove through two, unrestricted inlets and is heated while
passing through separate channels before being delivered
through three stainless steel multi-ported tubes located at
the top of the rebox.



You will enjoy the best results when burning wood that has
been adequately air-dried. Avoid burning “green” wood that
has not been properly seasoned. The wood should be no
longer than 16” (410 mm) in length, however, you will nd
that shorter wood lengths ease refueling and promote the
most efcient combustion.
The best hardwood fuels include oak, maple, beech, ash,
and hickory that has been split, stacked, and air-dried
outside under cover for at least one year.
For areas that do not have a supply of hardwood, com-
monly burned softwoods include tamarack, yellow pine,
white pine, Eastern red cedar, r, and redwood. These
too should be properly dried.
Keep wood a safe distance from the heater and keep it
out of the areas around the heater used for refueling and
ash removal.


No single air control setting will be appropriate for every
situation. Settings will differ depending on the quality of the
fuel, the amount of heat desired, and how long you wish
the re to burn.
The control setting also depends on your particular installa-
tion’s “draft,” or the force that moves air from the stove up
through the chimney. Draft is affected by such things as the
length, type, and location of the chimney, local geography,
nearby obstructions, and other factors.
Too much draft may cause excessive temperatures in the
Aspen, and could even damage it. On the other hand, too
little draft can cause backpufng into the room and/or the
“plugging” of the chimney.
How do you know if your draft is excessively high or low?
Symptoms of too much draft include an uncontrollable burn
or a glowing-red stove part. A sign of inadequate draft is
smoke leaking into the room through the stove or chimney
connector joints, low heat, and dirty glass.


     
       
      












18
Aspen®Woodburning Stove
30000369
ST263
starting a fire
12/99
 Start a re with small, dry kindling.
ST263
In newer homes that are well-insulated and weather-tight,
poor draft may result from insufcient air in the house. In
such cases, a slightly opened window or door, near the
stove on the windward side of the house will provide the
fresh air needed.
A more effective option for delivering ample combustion air
to the stove is to duct air directly from outdoors to the stove.
In fact, in some areas, provisions for outside combustion
air are required in all new construction. The optional Aspen
Outside Air Adapter #1897 is available from your dealer.
When you rst begin using the stove, pay attention to the
air control settings. You will quickly nd that a specic set-
ting will give you a xed amount of heat. It may take some
time to determine the amount of heat and the length of burn
you should expect from various settings.



Use the following air control settings as a starting point
to help determine the best settings for your installation.
(Fig. 28)

  
High From 12:00
Medium From 1:00
Low From 2:00
Before you start using the stove, please read the Appendix
on Draft Management starting on page 24 to learn how the
characteristics of your installation will affect the stove’s
performance. You and the stove are parts of a system, and
other parts of the system have a strong effect on opera-
tion; you may need to vary your ring technique to get the
performance you want.


Cast iron is extremely strong, but it can be broken with a
sharp blow from a hammer or from the thermal shock of
rapid and extreme temperature change.
The cast plates expand and contract with changes in
temperature. When you rst begin using your Aspen,
minimize thermal stress by allowing the plates to adjust
gradually during three or four initial break-in res following
.
       


      



High
ST262
air inlet settings
12/15/99 djt

Medium
Low
ST262a
 Air inlet shutter settings; Low - Medium - High.
Step 1. Open the primary air control fully.
Step 2. Place several sheets of crumpled newspaper
in the stove. Avoid using glossy or colored paper, as
these burn poorly. At the front of the rebox, place on
the paper six or eight pieces of dry kindling split to a
nger-width size, and on the kindling lay two or three
larger sticks of split dry wood approximately 1-2” (25-51
mm) in diameter.

19
Aspen®Woodburning Stove
30000369
Step 3. Light the newspaper and close the door. Gradu-
ally build up the re by adding a few 3-5” (80-120 mm)
diameter splits. 


• During the break-in res, don’t let the stove get hot-
ter than 500°F. (260°C) as measured on an optional
stove-top thermometer. Adjust the air control lever as
necessary to control the re.
• Some odor from the stove’s hot metal, the paint, and
the cement is normal for the rst few res.
Some chimneys need to be “primed,” or warmed
up, before they will draw sufciently to sustain a re. To
correct this situation, roll up a couple pieces of news-
paper, place them on top of the kindling and toward
the back of the stove, light them, and close the door.
This should heat the chimney enough to initiate strong
draft.
Once the draft is established, open the front door and
light the rest of the fuel bed at the bottom. Do not light
the main bed of fuel until the chimney begins drawing.
Step 4. using Steps
1-3, continue to build the re gradually. Add larger wood
with a diameter of 3-4” (75-102 mm).
ST264
good fire
12/99
 Gradually add larger pieces of wood until all the wood
is burning well.
ST264
Continue adding split logs of this size to the briskly-burn-
ing re until there is a glowing ember bed at least 2” (51
mm) deep. A good ember bed is necessary for proper
functioning and may take up to an hour to establish.
Step 5. Adjust the thermostatic air control for the desired
heat output.

Reload the Aspen while it is still hot and there are plenty of
glowing embers to re-kindle the re. Include some smaller
pieces of wood in the new load of fuel to help the stove return
to its operating temperature quickly. Wear stove gloves, and
follow this procedure when you reload your stove:
Step 1. Open the thermostat lever.
Step 2. Open the door and check the ash level in the ash
pan. If necessary, dispose of the ashes and replace
the pan.
Step 3. Use a replace tool to break up the charcoal and
direct ash through the grate. Pull the charcoal from the
back to the front. This will encourage efcient combus-
tion as the fuel burns from front to rear. (Fig. 31)
Step 4. Load wood — smaller, split pieces rst. Close the
door. Ideal performance will be achieved by operating
with the air control set in the maximum (HIGH) position
for several minutes after refueling. Reset the primary
air control for the desired heat output after the re is
re-established.
Primary Air
Outlet Plate
ST265
 Primary air outlet - keep clear of ash and charcoal ac-
cumulation.
ST265
ash pan
12/99
Keep Air Inlet Free of
Ash (Front Edge)

Remove ash before it reaches the top of the ash pan. Check
the level at least once a day, and before each re-fueling.
Using stove gloves, pull the ash pan out of the stove by its
handle. Remove the ash pan and properly dispose of the
ashes. Be sure to keep the pan level during disposal.
Empty the ash pan regularly, typically every one to three
days. The frequency will vary depending on how you op-
erate your Aspen; if you burn more wood at higher heat
output settings, ash will accumulate rapidly.
Dispose of ashes into a metal container with a tight-t-
ting lid kept outdoors. Put the closed container of ash on
a noncombustible oor or on the ground, well away from
all combustible materials, pending nal disposal. If the
ash is disposed of by burial in soil or otherwise locally
dispersed, keep it in the closed container until all cinders
have thoroughly cooled. You can use wood ash as a
garden fertilizer.

20
Aspen®Woodburning Stove
30000369

The use of smoke detectors throughout the home is strongly
advised, if not required by building codes or insurance
regulations. It is a good idea to install a smoke detector in
the living areas and each bedroom.
You may not, however, wish to install a detector in the im-
mediate vicinity of the stove. Depending on the sensitivity
of the unit, the alarm can be set off while you are tending
the re or emptying the ashes. If you install a detector in
the same room, locate it as far away from the stove as
possible.


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    


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
         

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
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