Vermont Castings 2550 Operation Manual
Homeowner’s
Installation and
Operating Manual
SAFETY NOTICE: IF THIS APPLIANCE IS NOT PROPERLY INSTALLED, OPERATED AND MAINTAINED, A HOUSE FIRE MAY RESULT.
TO REDUCE THE RISK OF FIRE, FOLLOW THE INSTALLATION INSTRUCTIONS. FAILURE TO
FOLLOW INSTRUCTIONS MAY RESULT IN PROPERTY DAMAGE, BODILY INJURY OR EVEN
DEATH. CONTACT LOCAL BUILDING OFFICIALS ABOUT RESTRICTIONS AND INSTALLATION
INSPECTION REQUIREMENTS IN YOUR AREA.
Do Not Discard This Manual: Retain for Future Use
2000956 1/07 Rev. 16
Encore
Woodburning Stove
Model 2550
2
Encore Woodburning Stove
2000956
Congratulations on your choice of a Vermont Castings Encore. With this purchase you have made a commitment to
make the hearth a place of warmth, beauty, and comfort in your home. At CFM Corporation, we share that joy and
appreciation for the hearth. You may be assured that your cast-iron Vermont Castings stove has been made with the
utmost care and will provide you with many years of service.
As you become acquainted with your new stove or fireplace, you will find that its visual appearance is matched by its
functionality, due to cast iron’s unique capability to absorb and radiate heat.
Also, CFM Corporation units are among the cleanest-burning wood stoves and fireplaces available today. As an
owner of a Vermont Castings stove, you make a strong statement for pollution-free energy. Clean burning, however,
depends on both the manufacturer and the operator. Please read this manual carefully to understand how to properly
operate and maintain your stove or fireplace.
At CFM Corporation, we are equally committed to your satisfaction as a customer. That is why we maintain an exclusive network of the finest dealers in the industry. Our dealers are chosen for their expertise and dedication to customer service. They are factory-trained and knowledgeable about every CFM Corporation product. Feel free to contact
your Authorized Vermont Castings Dealer anytime you have a particular question about your stove or its performance.
This manual contains valuable instructions on the installation and operation of your Vermont Castings stove. It also
contains useful information on maintenance and assembly of this product. We urge you to read the manual thoroughly
and to keep it as a reference.
Sincerely,
All of us at CFM Corporation
Welcome
This manual describes the installation, operation, and
maintenance of the Vermont Castings Encore Model
2550 catalytic-equipped wood burning heater. This
heater meets the U.S. Environmental Protection Agency’s emission limits for wood heaters sold on or after
July 1, 1990. Under specific test conditions this heater
has been shown to deliver heat at rates ranging from
8,700 to 41,700 Btu/hr.
The Encore Model #2550 has been tested and is listed
by Warnock Hersey International of Middleton, Wisconsin. The test standards are ANSI/UL-1482 and
ANSI/UL-737 for the United States, and ULC S627 and
CAN/CSA-B366.2 for Canada. The Encore is listed for
burning wood. Do not burn other fuels. The Encore
is listed and approved for use in mobile homes in the
United States only when installed with Vermont Castings Mobile Home Kit #3251.
We recommend that you hire a professional installer
certified by the Wood Heat Education and Research
Foundation (WHERF) or the Wood Energy Technical
Training (WETT) to install your stove, or to advise you
on the installation should you attempt to install it yourself.
Please read this entire manual before you install and
use your new stove. Failure to follow instructions may
result in property damage, bodily injury, or even death.
Accessories
Warming Shelves
#1560 Classic Black #1562 Sand
#1555 Biscuit #1565 Bordeaux
#1556 Chestnut Brown #1566 Forest Green
#1557 Ebony #1567 Midnight Blue
#1558 Vt. Classic Green #1568 Suede Brown
# 0127 Sparkscreen
# 0164 Bottom Heat Shield
# 0173 Rear Heat Shield
# 3257 Outside Air Adapter
# 3251 Mobile Home Kit
# 0191 Heat shields for the chimney connector
- Matching porcelain stovepipe
Specifications ................................. 3
Installation
...................................... 4
Assembly ...................................... 18
Operation
...................................... 19
Maintenance
................................. 27
Appendix: Catalytic Combustor
.... 33
Replacement Parts
....................... 34
Table of Contents
Proposition 65 Warning: Fuels used in gas, wood-
burning or oil fired 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
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Specifications
2"
(50mm)
25"
(640mm)
Top exit
flue collar
height
27"
(685mm)
25"
(660mm)
18"
(470mm)
7"
(190mm)
27"
(685mm)
22"
(570mm)
15"
(390mm)
5"
(130mm)
2" (75mm)
23
"
(595mm)
5"
(135mm)
15"
(380mm)
24"
(610mm)
3"
(83mm)
27"
(690mm)
21
"
(545mm)
18"
(460mm)
Fig. 1 Encore dimensions.
Drawings Not to Scale
Range of heat output .................8,700-41,700 Btu’s/Hr*
Maximum heat output ........................ 47,000 Btu’s/Hr**
EPA emissions ratings, g/h, catalytic .......................1.6*
Area heated*** ............... Up to 1900 sq. ft. (175 sq. m.)
Fuel size/type .....................18020” 9450-500 mm) logs
Fuel capacity ........................................... 40 lbs. (18kg)
Loading ....................................................... Front or top
Chimney connector:
for 8” flue collar ....................... 8” (203 mm) diameter
for 6” flue collar ....................... 6” (152 mm) diameter
Chimney flue size:
for 8” flue collar .......................8” (203 mm) minimum
for 6” flue collar .......................6” (152 mm) minimum
Flue exit position ....................... Reversible, top or rear
Primary air ... Manually set, thermostatically maintained
Secondary air .........................................Self-regulating
Ash handling system .....................Removable ash pan
Glass panel ......................... High-temperature ceramic
Weight ................................................. 350 lbs. (159kg)
Width (leg-to-leg) ..................................... 27” (685 mm)
Depth (leg-to-leg) .................................... 15” (380 mm)
Height to top of flue collar, (6” or 8”)
Top exit .............................................. 25¹⁄₄” (640 mm)
Rear exit ............................................ 26¹⁄₂” (675 mm)
*Under specific conditions used during EPA emissions
testing.
**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 construction (e.g. unusually well-insulated, not insulated, built underground, etc.) or if you live in a more
severe or more temperate climate, these figures may
not apply. Since so many variables affect performance,
consult your Vermont Castings’ Authorized Dealer to
determine realistic expectations for your home.
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SAFETY NOTICE: IF YOUR ENCORE IS NOT PROPERLY INSTALLED, A HOUSE FIRE MAY RESULT.
TO REDUCE THE RISK OF FIRE, FOLLOW THE
INSTALLATION INSTRUCTIONS. CONTACT LOCAL
BUILDING OR FIRE OFFICIALS ABOUT RESTRICTIONS AND INSTALLATION INSPECTION REQUIREMENTS IN YOUR AREA.
Before you begin an installation, be sure that:
• Your stove and chimney connector will be far
enough from combustible materials to meet all
clearance requirements.
• The floor protector is large enough and is con-
structed properly to meet all requirements.
• You have all necessary permits from local au-
thorities.
Your local building official is the final authority for approving your installation as safe and determining that it
meets local and state codes.
The metal label permanently attached to the back of
every Vermont Castings’ stove indicates the stove has
been tested to current UL and ULC standards, and
gives the name of the testing laboratory. Clearance
and installation information also is printed on the label.
When the stove is installed according to the information
both on the label and in this manual, local authorities
in most cases will accept the label as evidence that the
installation meets codes and can be approved.
However, codes 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 installation issues, refer to the
National Fire Protection Association’s publication
ANSI/NFPA 211 Standard for Chimneys, Fireplaces,
Vents and Solid Fuel Burning Appliances. For Canada,
the equivalent publication is CSA CAN-B365 Installation
Code for Solid Fuel Burning Appliances and Equipment.
These standards are the basis for many national codes.
They are nationally recognized and are accepted by
most local authorities. Your local dealer or your local
building official may have a copy of these regulations.
IMPORTANT: FAILURE TO FOLLOW THESE INSTALLATION INSTRUCTIONS MAY RESULT IN A
DANGEROUS SITUATION, INCLUDING A CHIMNEY
OR HOUSE FIRE. FOLLOW ALL INSTRUCTIONS
EXACTLY, AND DO NOT ALLOW MAKESHIFT COMPROMISES TO ENDANGER PROPERTY AND PERSONAL SAFETY.
Installation
Outside Air
In some modern, super-insulated homes, there is
inadequate air for combustion because of insufficient
air infiltration into the building. Such air enters a home
through unsealed cracks and openings. Exhaust fans
for kitchen or bath can compete with the stove for available air and compound the problem.
When poor draft is caused by a low infiltration rate,
opening a ground floor window on the windward side
of the house and in the vicinity of the stove will usually
alleviate the problem.
Another solution is to install a permanent outside air
supply to the stove and/or room. In fact, bringing air
for combustion from outside the home directly to the
air inlet of the stove is required for new construction in
some areas.
Pressure variations within the house do not affect a
stove equipped with an outside air supply, and improved stove performance often results. An Outside Air
Adapter Kit for the Encore is available from your local
Vermont Castings dealer.
Chimney Height
Altitude affects chimney performance. When using a
6” flue collar on the Encore, refer to Figure 2 for suggested chimney heights at various altitudes. Chimney
height should be measured from the flue collar to the
top of the chimney. The recommended minimum chimney height is 16’ (4.9m).
30
25
20
15
0 2000 4000 6000 8000 10000 12000
Height
Altitude
ST491
Fig. 2 Chimney height requirements for Encore when
equipped with a 6” chimney.
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What Kind of Chimney to Use
You must connect the Encore to a code-approved
masonry chimney with a flue liner, to a relined masonry
chimney that meets local codes, or to a prefabricated
metal chimney that complies with the requirements
for Type HT chimneys in the Standard for Chimneys,
Factory-Built, Residential Type and Building Heating
Appliance, UL 103. (Fig. 3) The chimney and chimney
connector must be in good condition and kept clean.
ST241
A tile-lined
masonry
chimney
A prefabricated doublewall insulated chimney
Fig. 3 Approved chimney types.
If you use an existing masonry chimney, it must be
inspected to ensure it is in a safe condition before the
stove is installed. Your local professional chimney
sweep, building inspector, or fire department official will
be able to inspect the chimney or provide a referral 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). (Fig. 4)
For proper draft and good performance, any chimney
used with an Encore should extend at least 16’ (5 m)
above the flue collar of the stove.
Masonry Chimneys
An inspection of the chimney must confirm that it has
a lining. Do not use an unlined chimney. The chimney
should have no cracks, loose mortar, other signs of
deterioration, and blockage. Repair any defects before
the chimney is used with your stove.
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 wallpaper are a hazard
and should be sealed with mortar or refractory cement.
In the event of a chimney fire, flames 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 your 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 pre-cast refractory tiles, stainless steel
pipe, or a code-approved, “poured-in-place” liner. The
chimney’s clean-out door must seal tightly.
Prefabricated Chimneys
A prefabricated metal chimney must be one tested and
listed for use with solid-fuel burning appliances to the
High-Temperature (H.T.) Chimney Standard UL-1031985 (2100°F) for the United States, and High Temperature (650°C) Standard ULC S-629 for Canada.
DO NOT CONNECT THIS UNIT TO A CHIMNEY FLUE
SERVING ANOTHER APPLIANCE.
Chimney Size
An Encore with an 8” (203 mm) flue collar is approved
for venting into a masonry chimney with a nominal flue
size of 8” x 8” (203 x 203 mm) or 8” x 12” (203 x
305 mm), and into a round flue with nominal flue size of
8” (203 mm). An Encore with a 6” (152 mm) flue collar
is approved for venting into a masonry chimney with a
nominal flue size of 8” x 8” (203 x 203 mm), and into a
round flue with nominal flue of 6” (152 mm).
NOTE: When installed with a 6” flue collar, the
Encore may not be operated with the front doors
open.
Whatever the flue collar size, an Encore may be vented
into larger chimneys as well. However, chimneys with
liners larger than 8” x 12” (203 x 305mm) may experience rapid cooling of smoke and reduction in draft, especially if the chimneys are located outside the home.
These large chimneys may need to be insulated or
have their flues relined for proper stove performance.
Accessories to help make the connection between
stainless steel chimney liners and your Encore are
available through your local dealer.
2' Min.
2' Min.
3'
Min.
0 To 10'
3'
Min.
0 To 10'
Reference
Point
AC617
Fig. 4 The 2’-3’-10’ Chimney Rule.
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Chimney Connector Guidelines
A chimney connector is the double-wall or single-wall
pipe that connects the stove to the chimney. The chimney itself is the masonry or prefabricated structure that
encloses the flue. Chimney connectors are used only to
connect the stove to the chimney, as in Figure 5.
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.
Do not use galvanized connector; it cannot withstand
the high temperatures that can be reached by smoke
and exhaust gases, and may release toxic fumes under
high heat. The connector may be 6” (152 mm) or 8 “
(203 mm) in diameter.
If possible, do not pass the chimney connector through
a combustible wall or ceiling. If passage through a combustible wall is unavoidable, refer to the section on Wall
Pass-Throughs. Do not pass the connector through an
attic, a closet or similar concealed space. The whole
connector should be exposed and accessible for inspection and cleaning.
In horizontal runs of chimney connector, maintain a distance of 24” (610 mm) from the ceiling. Keep it as short
and direct as possible, with no more than two 90° turns.
Slope horizontal runs of connector upward 1/4” per foot
(6 mm per meter) going from the stove toward the chimney. The recommended maximum length of a horizontal
run is 3’ (1 m), and the total length should be no longer
than 8’ (2.4 m). In cathedral ceiling installations, extend
the prefabricated chimney downward to within 8’ (2.4 m)
of the stove.
Wear gloves and protective eyewear when drilling,
cutting or joining sections of chimney connector.
Double-wall Chimney Connectors
Information on assembling and installing double-wall
connectors is provided by the manufacturer of the
double-wall pipe. Follow the manufacturer’s instructions
exactly as you assemble the connector and attach it to
the stove and chimney. Using chimneys and connectors
from the same manufacturer makes the assembly and
installation straightforward.
NOTE: For installations using double-wall connectors,
minimum clearances must conform to the listed clearances in the clearance chart on Page 14.
If the Encore is equipped with the 8” flue collar, an ovalto-round adapter will be needed. Double-wall oval-toround adapters are available from some manufacturers.
Your local dealer can help you select the right connector.
Single-wall Chimney Connectors
•
Begin assembly at the flue collar of the stove. Insert
the first crimped end into the stove’s flue collar, and
keep each crimped end pointing toward the stove.
(Fig. 5)Using the holes in the flue collar as guides,
drill 1/8” (3mm) holes in the bottom of the first section of chimney connector and secure it to the flue
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 (3) sheet metal
screws. The pre-drilled
holes in the top of each
section of chimney connector serve as guides
when you drill 1/8” (3mm)
holes in the bottom of the
next section.
• Secure the chimney con-
nector to the chimney.
Instructions for various
installations follow.
• Be sure the installed stove
and chimney connector are correct distances from
nearby combustible materials.
NOTE: Special slip pipes and thimble sleeves that form
telescoping joints between sections of chimney connector are available to simplify installations. They often
eliminate the need to cut individual connector sections.
Consult your local dealer about these special pieces.
Securing the Single-wall Connector to a
Prefabricated Chimney
Follow the installation instructions of the chimney
manufacturer exactly as you install the chimney. The
manufacturer of the chimney will supply the accessories to support the chimney, either from the roof of
the house, at the ceiling of the room where the stove is
installed, or from an exterior wall.
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 attaches directly to the chimney or to the
chimney’s ceiling support package, while the bottom of
the adapter is screwed to the chimney connector.
These adapters are designed so the top end will fit
outside the inner wall of the chimney, and the bottom
end will fit inside the first section of chimney connector.
When assembled in this way, any soot or creosote falling from the inner walls of the chimney will stay inside
the chimney connector.
Fig. 5 the crimped end
of the connector points
toward stove.
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Chimney
Elbow
Slip Pipe
Standard
Connector
Oval to
Round
Adapter
Flue Collar
Thimble
Flue Liner
Flue
ST492
Fig. 6 An exploded view of the chimney connection in a freestanding masonry installation.
Securing the Single-wall Connector to a
Masonry Chimney
Both freestanding masonry chimneys and fireplace
masonry chimneys may be used for your installation.
Freestanding Installations
If the chimney connector must pass through a combustible wall to reach the chimney, follow the recommendations in the Wall Pass-Through section that follows.
The opening through the chimney wall to the flue
(the “breech”) must be lined with either a ceramic or
metal cylinder, called the “thimble”, which is cemented
securely in place. Most chimney breeches incorporate
thimbles, but the fit must be snug and the joint between
the thimble and the chimney wall must be cemented
firmly.
A special piece called the “thimble sleeve,” slightly
smaller in diameter than standard connectors and
most thimbles, will facilitate the removal of the chimney
connector system for inspection and cleaning. Thimble
sleeves should be available from your local dealer.
To install a thimble sleeve, slide it into the breech until
it is flush with the inner flue wall. Do not extend it into
the actual flue passage, as this could interfere with the
draft.
Thimble Sleeve
Chimney Connector
Flue
Keep
sleeve
end flush
with flue
tile
ST243
Fig. 7 The thimble, made of either ceramic or metal, must be
cemented securely in place.
The thimble sleeve should protrude 1-2” (25-50mm) into
the room. (Fig. 7) 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.
Without a thimble, a suitable length of chimney connector can be extended through the breech to the inner
face of the flue liner, and cemented securely in place.
Additional pieces of connector are then attached with
sheet metal screws.
Fireplace Installations
The chimney connector may be connected to the
chimney above the fireplace opening or through the
fireplace.
Above the Fireplace
The Encore may be connected to a chimney above
a fireplace opening. (Fig. 8) In such installations, the
stove is positioned on the hearth in front of the fireplace
and the chimney connector rises from the stove top and
then angles ninety degrees back into the chimney. The
chimney liner should extend to the point at which the
chimney connector enters the chimney.
If the chimney connector from your installation enters
the chimney above a fireplace, follow all the guidelines
mentioned above for freestanding installations. In addition, give special consideration to the following points:
• Check the clearance between the stove and the
chimney connector, and any combustible trim or the
mantel. Use the necessary combination of mantel, trim,
and connector heat shields to achieve the required
clearances.
• Check the clearance between the chimney con-
nector and the ceiling. If no heat shields are used, the
clearance should be at least 24” (610 mm). To find out
how much this clearance may be reduced with heat
shields, refer to the clearance chart on Page 14.
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• The fireplace damper must be sealed to prevent
room air from escaping up the flue. However, it must be
possible to re-open the damper to inspect or clean the
chimney.
* Check
These Clearances
*
*
Chimney
Connector Shields
Mantel
Seal this off
ST244
Fig. 8 In this installation, the chimney connector is attached
to the chimney above the fireplace opening.
Through the Fireplace
If your fireplace opening height is at least 26¹⁄₂" (675 mm),
you may install an Encore through the opening using a
“positive connection” kit, available from your local dealer.
These positive connection kits ensure a tight fit between
the stove flue collar and the chimney flue. (Fig. 9)
Fireplace installations, whether connected to the flue
above or through the fireplace opening, have special
clearance requirements to adjacent trim and the mantel.
You’ll find the required safe clearances for Encore fireplace installations on Page 12.
Floor protection requirements also apply to fireplace
installations. This information is on Page 10.
Wall Pass-Throughs
Whenever possible, design your installation so the connector does not pass through a combustible wall. If you
are considering a wall pass-through in your installation,
check with your building inspector before you begin.
Also, check with the chimney connector manufacturer
for any specific requirements.
Accessories are available for use as wall passthroughs. If using one of these, make sure it has been
tested and listed for use as a wall pass-through.
Flexible Connector
Mantel Shield
Fireplace
Adapter
Kit “Positive Connection”
ST245
Fig. 9 In this installation, the chimney connector enters the
firepalce opening and then connects to the chimney.
In the United States, the National Fire Protection Association (NFPA) has established guidelines for passing
chimney connectors through combustible walls. Many
building code inspectors follow these guidelines when
approving installations.
Figure 10 shows one NFPA-recommended method.
All combustible material in the wall is cut away from
the single-wall connector to provide the required 12”
(305mm) clearance. Any material used to close up the
opening must be noncombustible.
Three other methods are also approved by the NFPA:
• Using a section of double-wall chimney with a 9”
(229 mm) clearance to combustibles.
• Placing a section of chimney connector inside
a ventilated thimble, which in turn is separated from
combustibles by 6” (152 mm) of fiberglass insulating
material.
• Placing a section of chimney connector inside a
section of 9” (230 mm) diameter, solid-insulated, factory-built chimney, with 2” (51 mm) of air space between
the chimney section and combustibles.
In Canada, The Canadian Standards Association has
established different guidelines. Figure 10 shows one
method, in which all combustible material in the wall is
cut away to provide the required 18” (457 mm) clearance for the connector. The resulting space must remain empty. A flush-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.
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D
E
F
I
A
N
T
Wall Stud
Chimney
Connector
12” Noncombustible
Material
Floor Protection
ST493
Fig. 10 An approved wall pass-through for the United States.
Your local dealer or your local building inspector can
provide details for other approved methods of passing
a chimney connector through a combustible wall in your
area. In Canada, this type of installation must conform
to CAN/CSA-B365, Installation Code for Solid Fuel
Burning Appliances and Equipment.
NOTE: Do not vent your Encore into a factory-built
(zero-clearance) fireplace. These appliances and their
chimneys are specifically designed as a unit for use as
fireplaces. It may void the listing or be hazardous to
adapt them for any other use.
T
18” (460mm) clear
space all around
the pipe
ST494
Fig. 11 An approved wall pass-through for Canada.
DO NOT CONNECT AN ENCORE TO ANY AIR DISTRIBUTION DUCT OR SYSTEM.
Floor Protection
A tremendous amount of heat radiates from the bottom
plate of your stove. The floor 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 firebox.
Heat protection is provided through the use of a Vermont Castings Bottom Heat Shield #0164. Spark and
ember protection must be provided by a floor protector
constructed with noncombustible material as specified.
Most installations will require 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 floor beneath. For
installations with the heat shield attached, use a noncombustible floor protector such as 1/4” nonasbestos
mineral board or equivalent, or 24 gauge sheet metal.
The floor protector may be covered with a noncombustible decorative material if desired. Do not obstruct the
space under the heater.
Protection requirements vary somewhat between the
Untied States and Canada as follows:
U. S. installations the floor protector is required under
the stove and must extend at least 16” (not including
the ash lip) from the front of the stove (“F”, Fig. 12), and
at least 6” from the sides and rear. (“D” and “E”, Fig.
12) It must also extend under the chimney connector
and 2” to either side. (“C”, Fig. 12) For the 8” (203 mm)
connector, the protector must be a minimum of 12”
(305 mm) wide. For the 6” (152 mm) connector, the
protector must be 10” (254 mm) wide. The protector
must be centered under the connector.
To meet these requirements, a floor protector must be
at least 39” wide and 44” deep.
In Canada: A noncombustible floor protector is required
under the stove as well. The floor protector must
extend 18” (457 mm) to the front (“F”, Fig. 12), and 8”
(203 mm) from the sides and rear. (“D” and “E”, Fig. 12)
To meet these requirements, a floor protector must be
at least 43” (1092 mm) wide and 48” (1219 mm) deep.
Floor protection also must extend under the chimney
connector and 2” (51 mm) to either side. (“C”, Fig. 12)
For the 8” (203 mm) connector, the protector must be
a minimum of 12” (305 mm) wide. For the 6” (152 mm)
connector, it must be at least 10” (254 mm) wide. The
protector must be centered under the connector.
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Floor Protection for Fireplace Installations
Do not assume that your fireplace hearth is completely
noncombustible.
Many fireplace hearths do not meet the “completely
noncombustible” requirement because the brick or
concrete in front of the fireplace opening is supported
by heavy wood framing. (Fig. 13) Because heat passes
through brick or concrete readily, it can easily pass
through to the wood. As a result, such fireplace hearths
can be a fire hazard and are considered a combustible
floor.
Keep in mind, also, that many raised hearths will extend
less than the required clearance from the front of the
heater when it is installed. In such cases, sufficient
floor protection as described above must be added in
front of the hearth to satisfy the minimum floor protector
requirement from the front of the stove: 16” (406mm)
from the front in the United States and 18” (459mm)
from the front in Canada.
Hearth rugs do not satisfy the requirements for floor
protection.
Fireplace installations also have special clearance
requirements to the side walls, side decorative trim, and
fireplace mantel. This information follows in the section
on Fireplace and Mantel Trim Shields.
Wood framing requires protection from radiant heat
ST247e
Fig. 13 Combustible supporting timbers may lie beneath
fireplace hearths, requiring additional floor protection.
Keep the Stove a Safe Distance
from Surrounding Materials
Both a stove and its chimney connector radiate heat in
all directions when operating, and dangerous overheating of nearby combustible materials can occur if they
are too close to the heat. A safe installation requires
that adequate clearance be maintained between the
hot stove and its connector and nearby combustibles.
Clearance is the distance between either your stove
(measured from the bottom edge of the stove’s top
plate) or chimney connector, and nearby walls, floors,
the ceiling, and any other fixed combustible surface.
Your stove has special clearance requirements that
have been established after careful research and testing to UL and ULC standards. These clearance requirements must be strictly observed.
In addition, furnishings and other combustible materials must be kept away from the stove as well. In general, a distance of 48” (1219mm) must be maintained
between the stove and moveable combustible items
such as drying clothes, furniture, newspapers, firewood,
etc. Keeping those clearance areas empty assures that
nearby surfaces and objects will not overheat.
Reducing Clearances Safely with Shields
Clearance requirements are established to meet every
installation possibility, and they involve the combination
of four basic variables:
• When the stove and chimney connector have no
listed heat shield mounted on them.
• When the stove and chimney connector have a
listed heat shield mounted on them.
• When the wall has no listed heat shield mounted
on it.
• When the wall has a heat shield mounted on it.
D
E
A
B
A
E
C
E
F
E
F
U.S. Canada
A. 39” 43” (1092 mm)
B. 44” 48” (1219 mm)
C. 12” 12” (305 mm) 8” Connector
10” 10” (255 mm) 10” Connector
D. 6” 8” (203 mm)
E. 6” 8” (203 mm)
F. 16” 18” (459 mm)
ST500
Fig. 12 Required floor protector dimensions for both top-and
rear-exiting stove.
11
Encore Woodburning Stove
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In general, the greatest clearance is required when you
place a stove and its connector with no heat shields
near a wall with no heat shield.
For example, when the Encore is installed parallel to
the rear wall and no shields are used, it must be at least
31” (787 mm) from the wall behind it and at least 24”
(610 mm) from walls on either side.
If the Encore is installed in a corner and no shields
are used, the corners of the stove must be at least 24”
(610 mm) from nearby walls.
The least clearance is required when both the stove
and its connector, as well as the wall, have heat
shields.
When shields are attached to the stove or chimney
connector, they are mounted 1” - 2” (25-51 mm) away
from the stove or connector surface on noncombustible
spacers. Air flowing between the stove (and/or chimney
connector) and nearby shields carries away heat. Do
not block the air flow by filling this empty space with any
insulating material.
The shiny shield surface facing the heat source must be
left unpainted, enabling it to reflect heat back towards
the stove or connector and away from the wall.
Clearances may be reduced only by means approved
by the regulatory authority, and in accordance with the
clearances listed in this manual.
Because of their restricted air flow and heat retention
characteristics, specific construction requirements and
special clearances apply to installations into alcoves.
Refer to the diagrams on Page 10, and contact your
Vermont Castings Dealer for details before beginning
an alcove installation.
NOTE: ALCOVE INSTALLATION OF THE ENCORE
IS NOT PERMITTED IN CANADA.
Wall Shields
One way to reduce clearances is with a wall shield
constructed of 24 gauge or heavier sheet metal, or of
another noncombustible material such as 1/2” (13 mm)
insulation board or common brick “laid on flat,” with the
3¹⁄₂" (90 mm) side down.
Shields must be spaced out from the combustible
surface 1" (25 mm) on noncombustible spacers, as in
Figure 13. The spacers should not be directly behind
the stove or chimney connector.
Air must be able to flow 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. Use metal screening, as in Figure 14, to keep
stray objects from falling behind the shield.
The shield for a top-exit stove must extend 10" (254 mm)
above
the top of the stove; for a rear exit configuration, the shield must be 36” (914 mm) high. The shield
for the chimney connector must be 30” (762 mm) wide,
centered behind the pipe; for installations that use an
approved prefabricated chimney to pass through the ceiling, the chimney connector shield must stop 1” (25 mm)
below the ceiling.
Stove Heat Shields
The Vermont Castings Encore Rear Heat Shield is one
way to reduce the clearance to the rear wall. The rear
heat shield can be installed on either rear- or top-venting stoves. However, since the chimney connector
also radiates heat toward the wall in top-venting installations, you should use a chimney connector shield
whenever you use the rear heat shield on top-venting
stoves.
Clearance reductions with the rear heat shield apply
only to the wall to the rear in parallel installations. Neither the side clearance requirement nor the clearance
requirement in corner installations may be reduced.
Air Flow
Stud Wall
Framing
W
all Shield
Noncombustible
Spacer and
Fasteners
Drywall
Airflow
Metal
Screening
Wall
Shield
Metal Lathe or
Noncombustible
Spacers
ST248
Fig. 14 Approved wall shield construction.
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Encore Woodburning Stove
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Chimney Connector Heat Shields
Chimney Connector Heat Shields should be used
whenever the rear heat shield is used, or in any other
situation when it is necessary to protect nearby combustibles from the heat of the connector. The ceiling
above horizontal runs of chimney connector must be
protected as well if the clearance is inadequate.
In top-exiting installations, the connector shield must
extend to a point exactly 28” (710 mm) above the flue
collar or to an elbow in the connector, whichever is less.
If the top-exiting connector extends to the ceiling where
it connects with a prefabricated insulated metal chimney, an additional ceiling heat shield must be installed
that is 24” (610 mm) in diameter and that extends 1”
(25 mm) below the ceiling. The ceiling shield must be
constructed of 24 gauge or heavier sheet metal, and
must be centered on the chimney.
Fireplace and Mantel Trim Shields
A fireplace installation requires special clearance between the side of the stove and the right and left walls,
between the side of the stove and the decorative side
trim on the fireplace face, and between the top of the
stove and the mantel.
Noncombustible shields installed 1” (25 mm) from the
combustible surface on noncombustible spacers, called
ventilated shields, may be used to reduce clearances.
To protect a mantel from the heat of an Encore in a
fireplace installation, use a custom-made ventilated
mantel shield that is at least 48” (1219 mm) long, that is
centered over the stove. (Fig. 15) Ventilated shields for
side trim must extend the full length of the trim.
An unprotected mantel (“A”, Fig. 16) cannot be more
than 9” (229 mm) deep and must have a minimum
clearance of 39” (990 mm), measured from the stove’s
top plate. With a ventilated shield, this clearance may
be reduced safely to 18” (457 mm).
Unprotected top trim (B) protruding 9” (229 mm) or less
from the face of the fireplace must be a minimum of 39”
(990 mm) from the stove’s top surface. With a ventilated trim shield, this clearance may be reduced safely
to 18” (457 mm).
Unprotected side trim (C) that protrudes 2” (51 mm) or
less from the face of a fireplace must have a minimum
clearance of 10” (254 mm), measured from the stove’s
top side edge. With a ventilated trim shield, the clearance may be reduced safely to 8” (203 mm). If the
trim extends more than 2” (51 mm), it is subject to the
requirements for wall clearance.
The charts and sample installations that follow list all
the clearances required for the various installation configurations of the Encore.
1" (25mm)
1/4" (6mm)
ST501
Fig. 15 A custom formed mantel shield.
C
C
A
B
Fireplace and Mantel Trim Clearances
Unprotected Protected
A. Mantel 39” (990 mm) 18” (457 mm)
B. Top Trim 39” (990 mm) 18” (457 mm)
C. Side Trim 10” (254 mm) 8” (203 mm
ST253b
Fig. 16 Maintain clearances to combustible components of
the mantelpiece.
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