Vermont Castings The Aspen 1920 Mounting instructions
Homeowner’s
Installation
and Operating
Manual
For use in the
United States and Canada
30000369 7/11 Rev. 22
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 condent you will nd the
Aspen to be an effective wood-burning heater incorporating modern, non-catalytic combustion technology with the
classic aesthetic appeal of its Vermont Castings lineage.
The Aspen achieves high-efciency through precisely calibrated delivery of primary and secondary air into a refrac-
tory-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 munici-
pal building department, re department, re prevention bureau, etc.) before installation to determine the need for a
building permit. Also, consult your insurance agent to be sure your installation complies with specic 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.
Specications .....................................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,
woodburning or oil red appliances, and the prod-
ucts 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
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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 op-
erated, 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 efciencies.
2 These values are based on operation in building code-
conforming homes under typical winter climate condi-
tions in New England. If your home is of nonstandard
construction (e.g., unusually well insulated, not insu-
lated, 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 expectations 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 specications.
3069
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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 prefabricated metal chimney. Whichever of
those types you use, the chimney and chimney connec-
tor must be in good condition and kept clean.
If you use an existing masonry chimney, it must be
inspected to ensure safe condition before the stove is
installed. Your local professional chimney sweep, build-
ing inspector, or re department ofcial 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
chimney 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
requirements.
• 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 ofcial is the nal authority for ap-
proving 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 instal-
lation information is also printed on the label. Local au-
thorities 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 approved. Codes, however, vary in
different areas. Before starting the installation, review
your plans with the local building authority. Your local
dealer can provide any additional information needed.
For any unresolved questions about installation, refer
to the National Fire Protection Association’s publica-
tion 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 ofcial 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 mortar, 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
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Aspen®Woodburning Stove
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ST242
Chimney connector
12/13/99 djt
• 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. Openings sealed with pie plates or wallpa-
per 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. Ma-
sonry chimneys must be lined, either with code-ap-
proved masonry or precast refractory tiles, stainless
steel pipe, or a code-approved, “poured-in-place”
liner. The chimney clean-out door must seal tightly to
ensure a good draft.
A prefabricated metal chimney must be one that is test-
ed 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 chim-
ney 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 con-
necting 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 chim-
ney itself 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 con-
nectors should be made of 24 gauge or heavier steel,
and should be 6” (152mm) 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 combus-
tible wall or ceiling. If
passage through a
combustible wall is
unavoidable, refer to
the recommendations
in the section follow-
ing on Wall Pass-
throughs. Do not pass
the connector through
an attic, a closet or
any similar concealed
space. The whole chimney connector should be ex-
posed and accessible for inspection and cleaning.
Install the single wall chimney connector not less than
18” (457mm) 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 (20mm per
meter) going from the stove toward the chimney. The
recommended maximum length of a horizontal run is
3’ (914mm), and the total length of chimney connector
should be no longer than 8’ (2.5 meters).
In cathedral ceiling installations, extend the prefabri-
cated chimney downward to within 8 feet (2.4m) of the
stove.
Flue gas
direction
Toward
stove
Chimney connector.
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Aspen®Woodburning Stove
30000369
ST243
thinble connection
12/13/99 djt
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
appliances 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
assure safety, use chimney components manufactured
by a single source.
• 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
connector, 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” (3mm) holes in the bot-
tom of the next section.
• Secure the chimney connector to the chimney. In-
structions for various installations follow.
• Be sure the installed stove and chimney connector
are correct distances from nearby combustible mate-
rial.
Special slip pipes and thimble sleeves that form
telescoping joints between sections of chimney con-
nector 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
manufacturer exactly.
Special adapters are available from your local dealer to
make the connection between the prefabricated chim-
ney and the chimney connector. The top of such adapt-
ers 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
falling 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 combus-
tible wall to reach the chimney, follow the recommenda-
tions 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 con-
nector 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.
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
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Aspen®Woodburning Stove
30000369
In this installation, the chimney connector enters the
replace ue though a thimble located above the re-
place. 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 install-
ing 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 neces-
sary, use a combination of mantel, trim, and connec-
tor heat shields to provide the required clearances.
• Double-check connector clearance to the ceiling.
• The replace damper must be closed and sealed to
prevent 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.
If your replace opening height is at least 21¹⁄₂" (546
mm), you may install a stove through the opening us-
ing a “positive connection” kit available from your local
dealer. These kits provide a secure connection be-
tween the stove ue collar and the chimney ue.
Conrm that the stove location is within the required
clearance specications for the mantel and surrounding
replace trim. Refer to Page 12.
Floor protection requirements also apply to replace
installations. 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 instal-
lation, check with your building inspector before you
begin. Also check with the chimney connector manu-
facturer for any specic 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
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Aspen®Woodburning Stove
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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 construct-
ed to NFPA 211
ST275
The National Fire Protection Association (NFPA) has
established 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 com-
bustible 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.
• 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 sepa-
rated 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
chimney, with two inches of air space between the
chimney section and combustibles. (Fig. 12)
In Canada, the Canadian Standards Association has
established specic 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 Burn-
ing Appliances and Equipment.
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
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
Channels
Masonry Chimney construct-
ed 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
9
Aspen®Woodburning Stove
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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 Bot-
tom Heat Shield #1895. Spark and ember protection
must be provided by a oor protector constructed with
noncombustible material as specied.
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
installations with the heat shield attached, use a non-
combustible oor protector such as 1/4” nonasbestos
mineral board or equivalent, or 24 gauge sheet metal.
The oor protector may be covered with a noncombus-
tible decorative material if desired. Do not obstruct the
space under the heater.
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
connector 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)
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 supported 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 com-
bustible 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, sufcient
oor protection as described above must be added in
front of the hearth to satisfy the minimum oor protector
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
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
protection as they are only re-retardant, not re proof.
Fireplace installations also have special clearance
requirements 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
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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 over-
heat.
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
moveable 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 congurations. These involve four basic
variables:
• When the stove has no listed heat shield in-
stalled.
• 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
mounted 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
clearances listed in this manual.
When determining clearance, always measure from
the top plate of the stove, or, from the chimney connec-
tor itself, to the adjacent combustible surface. Do not
measure from the heat shields of the stove or connector
to the combustible surface.
The Aspen is approved for use in manufactured (mo-
bile) homes when installed with the optional Mobile
Home Kit #1898 in accordance with the instructions
provided with that kit and any local codes. This approv-
al applies only in the United States.
In addition to the standard installation requirements
described 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 standard 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 struc-
ture 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 noncom-
bustible 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, specically those
related to mobile homes. Other requirements may
be applicable to chimney system removal for trans-
portation of the mobile home.
11
Aspen®Woodburning Stove
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Wall shields should be constructed of 24 gauge or
heavier sheet metal, or another noncombustible mate-
rial such as 1/2” (13mm) insulation board or common
brick “laid on at,” with the 3¹⁄₂" (90mm) side down.
Shields must be spaced out from the combustible sur-
face 1" (25mm) on noncombustible spacers. The spac-
ers 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" (25mm) of the
shield should be open and the shield must be open at
the top.
The following examples of wall shield construction illus-
trate 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 be-
tween 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" (38mm) from
the face of the replace must be a minimum of 12"
(305mm) from the stove top. This clearance may not be
reduced by shielding.
For every 1¹⁄₂" (38 mm) increment that the trim or man-
tel 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
constructed 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 Specications.
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
Adapter)
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 evident 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 wash-
ers from the parts bag. The shoulder of the legs
should seat within the locator bosses cast into the
stove bottom 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 col-
lar 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 bot-
tom 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 reects radiant heat away
from combustible materials located behind the stove. Its
use enables you to install the stove at a reduced clear-
ance to combustible materials in accordance with the
specications 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 ther-
mostat 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 composed of unpainted cement on earth.
1. Remove the 1/4-20x 3/8” phillips screw from the cen-
tral 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 re-
moved. 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
corner of the stove, controls the amount of incoming pri-
mary 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 radi-
ating 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, how-
ever, you will nd that shorter wood lengths ease refuel-
ing and promote the most efcient 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
installation’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 backpufng 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 uncontrol-
lable burn or a glowing-red stove part. A sign of inad-
equate draft is smoke leaking into the room through the
stove or chimney connector joints, low heat, and dirty
glass.
18
Aspen®Woodburning Stove
30000369
In newer homes that are well-insulated and weather-
tight, poor draft may result from insufcient 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
specic setting 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 Ap-
pendix 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 operation; 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 follow-
ing .
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.
Step 3. Light the newspaper and close the door.
Gradually 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
hotter than 500°F. (260°C) as measured on an op-
tional 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 sufciently to sus-
tain a re. To correct this situation, roll up a couple
pieces of newspaper, 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.
19
Aspen®Woodburning Stove
30000369
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 be-
gins 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).
Continue adding split logs of this size to the briskly-
burning re until there is a glowing ember bed at
least 2” (51 mm) deep. A good ember bed is neces-
sary for proper functioning and may take up to an
hour to establish.
Step 5. Adjust the thermostatic air control for the de-
sired heat output.
Reload the Aspen while it is still hot and there are plen-
ty 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 combustion 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 oper-
ating with the air control set in the maximum (HIGH)
positon for several minutes after refueling. Reset the
primary air control for the desired heat output after
the re is re-established.
ST263
starting a fire
12/99
Start a re with small, dry kindling.
ST263
ST264
good fire
12/99
Gradually add larger pieces of wood until all the wood
is burning well.
ST264
20
Aspen®Woodburning Stove
30000369
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 dur-
ing disposal.
Empty the ash pan regularly, typically every one to
three days. The frequency will vary depending on how
you operate 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.
The use of smoke detectors throughout the home is
strongly advised, if not required by building codes or in-
surance 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
immediate vicinity of the stove. Depending on the sensi-
tivity 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.
Primary Air
Outlet Plate
ST265
Primary air outlet - keep clear of ash and charcoal
accumulation.
ST265
ash pan
12/99
Keep Air Inlet Free of
Ash (Front Edge)
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