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
30003842 2/08 Rev. 1
Encore Woodburning Stove
Welcome
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
This manual describes the installation, operation, and
maintenance of the Vermont Castings Encore Model
2550CE 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 up to 10.1 kW (34,500
BTU/hr).
The Encore Model #2550CE has been tested to current standards. The test standards are UL-1482 and
ANUL-737 for the United States, and EN13240:2001
+ A2:2004 for Europe. 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
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.
Weight ................................................159 kg (350 lbs.)
Width (leg-to-leg) ..................................... 685 mm (27”)
Depth (leg-to-leg) .................................... 380 mm (15”)
Height to top of flue collar, 152 or 203 mm (6” or 8”)
Top exit .............................................. 640 mm (25¹⁄₄”)
Rear exit ............................................ 675 mm (26¹⁄₂”)
1. This value can vary depending on how the stove
is operated, 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
nominal fuel consumption obtained under laboratory
conditions and on average efficiencies.
Fig. 1 Encore dimensions.
30003842
Drawings Not to Scale
3
Encore Woodburning Stove
30
25
20
15
0 2000 4000 6000 8000 10000 12000
Height
Altitude
Installation
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 standards. The test standard
is EN13240:2001 + A2:2004 for Europe. 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 countries. Before
starting the installation, review your plans with the local
building authority. Your local dealer can provide any additional information needed.
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.
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.
For appliances with power outputs above 5 kW, a
permanently open air vent is required by Section 2 of
Document J. Air inlet grilles should be positioned so
that they will not be blocked. Refer to local and national
codes for recommended configurations.
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 4.9 m (16’).
All local regulations, including those referring to
national and European standards, need to be complied with when installing this stove.
4
ST491
Fig. 2 Chimney height requirements for Encore when
equipped with a 152 mm (6”) chimney.
30003842
Encore Woodburning Stove
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. (Fig. 3) The chimney and chimney connector must be in good condition and kept clean.
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 flue and chimney design must meet requirement
J2, Part J of the building regulations 2000 (Combustion
Appliances and Fuel Storage Systems).
A prefabricated doublewall insulated chimney
A tile-lined
masonry
chimney
ST241
Fig. 3 Approved chimney types.
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
These should be an internal diameter of 150 mm (6”)
and be of the twin wall insulated construction that has
been approved for solid fuel use (e.g. Rite Vent ICS of
ICID Lite Chimney Systems). Diameters over 200 mm
(8”) are not recommended due to the large cross-section causing excessive cooling of the flue gases.
DO NOT CONNECT THIS UNIT TO A CHIMNEY FLUE
SERVING ANOTHER APPLIANCE.
Chimney Size
An Encore with an 203 mm (8”) flue collar is approved
for venting into a masonry chimney with a nominal flue
size of 203 x 203 mm (8” x 8”) or 203 x 305 mm ( 8”
x 12”), and into a round flue with nominal flue size of
203 mm (8”). An Encore with a 152 mm (6”) flue collar
is approved for venting into a masonry chimney with a
nominal flue size of 203 x 203 mm (8” x 8”), and into a
round flue with nominal flue of 152 mm (6”).
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 203 x 305 mm (8” x 12”) 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.
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.
Connecting Flue Pipes
Connector pipes should meet the requirements of the
building regulations. This can be achieved by the use
connecting fluepipes included in the following categories:
a) Vitreous enamelled steel pipe complying with BS
6999: 1989 (1996);
b) Pipes made from stainless steel as descirbed in BS
EN 1008-1:1995 grades 1.4401, 1.4404, 1.4432 or
1.4436 with flue wall thickness of at least 1 mm;
c) Mild steel fluepipes complying with BS 1449: Part 1:
1991, with a flue wall thickness of at least 3 mm;
d) Cast iron fluepipes complying with BS 41: 1973
(1998).
30003842
5
Encore Woodburning Stove
Flue Pipes with a spigot and socket joint should be
fitted with the socket facing upwards, to contain condensates and moisture within the flue. Joints should be
made gas tight using proprietary jointing accessories,
or, where appropriate, by packing joint with noncombustible rope and fire cement.
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 152 mm (6”) or 203
mm (8”) 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 610 mm (24”) from the ceiling. Keep it as short
and direct as possible, with no more than two 90° turns.
Slope horizontal runs of connector upward 6 mm per
metere (1/4” per foot) going from the stove toward the
chimney. The recommended maximum length of a horizontal run is 914 mm (36”), and the total length should
be no longer than 2.4 m (8’). In cathedral ceiling installations, extend the prefabricated chimney downward to
within 2.4 m (8’) of the stove.
Wear gloves and protective eyewear when drilling,
cutting or joining sections of chimney connector.
Double-wall Chimney Connectors
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. 4) Using the holes in the flue collar as guides,
drill 3 mm (1/8”) 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 3 mm (1/8)
holes in the bottom of the
next section.
• Secure the chimney con-
nector to the chimney.
Instructions for various
installations follow.
Fig. 4 the crimped end
of the connector points
toward stove.
• 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
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 203 mm (8”) flue
collar, an oval-to-round adapter will be needed. Doublewall oval-to-round adapters are available from some
manufacturers. Your local dealer can help you select
the right connector.
6
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.
30003842
Encore Woodburning Stove
Chimney
Elbow
Slip Pipe
Standard
Connector
Oval to
Round Adapter
Flue Collar
Fig. 5 Chimney connection in a freestanding masonry installation.
Flue
Flue Liner
Thimble
ST492
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
Fig. 6 The thimble, made of either ceramic or metal, must be
cemented securely in place.
Flue
Keep
sleeve
end flush
with flue
tile
ST243
The thimble sleeve should protrude 1-2” (25-50mm) into
the room. (Fig. 6) 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. 7) 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 610 mm (24”). To find out
how much this clearance may be reduced with heat
shields, refer to the clearance chart on Page 12.
30003842
7
Encore Woodburning Stove
*
*
T
• 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.
Chimney
Connector Shields
Flexible Connector
Mantel Shield
Fireplace Adapter
Kit “Positive Connection”
* Check
These Clearances
ST244
Fig. 7 In this installation, the chimney connector is attached
to the chimney above the fireplace opening.
Mantel
Seal this off
Through the Fireplace
If your fireplace opening height is at least 675 mm (26¹⁄₂"),
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. 8)
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 11.
Floor protection requirements also apply to fireplace
installations. This information is on Page 9.
ST245
Fig. 8 In this installation, the chimney connector enters the
firepalce opening and then connects to the chimney.
Figure 9 shows one method of passing a connector
through a wall. All combustible material in the wall is cut
away to provide the required 457 mm (18”) 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 25 mm (1”) clear of the wall.
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.
DO NOT CONNECT AN ENCORE TO ANY AIR DISTRIBUTION DUCT OR SYSTEM.
457 mm (18”) clear
space all around
the pipe
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.
8
ST494
Fig. 9 An approved wall pass-through.
30003842
Hearths
This appliance must be installed on to hearth that
meets the requirements of Part J of the Building Regulations 2000 (Combustion Appliances and Fuel Storage
Systems). This can be achieved by ensuring that the
hearth is constructed and sized in accordance with the
guidelines included in section 2 of approved document
‘J’. The size and clearances of the hearth are as follows:
The constructed hearth should be constructed in accordance with the recommendations in document J,
and should be of minimum width 840 mm and minimum
depth 840 mm (if a free standing hearth b) above) or
a minimum projection of 150 mm from the jamb (if a
recessed hearth a) above).
Unless the stove
hearth is completely
noncombustible, the
bottom heat shield
should be installed to
provide radiant protection for framing which
may be below the
hearth. (Fig. 11)
Appliance
Doors
Costructional Hearth
Dimensions as below
Encore Woodburning Stove
Wood framing requires protection from radiant heat
At least 150 mm
or to a suitable
heat resistant wall
Appliance
Doors
ST247e
At least
150 mm
Perimeter should be
clearly marked e.g.
edge of superimposed
hearth
a) Fireplace recessb) Free standing
Fig. 10 Noncombustible hearth surface dimensions.
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. 11) 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: 406 mm (16”)
from the front.
Hearth Surface
Free of Combustible Material
Perimeter should be
clearly marked e.g.
At least
300 mm
edge of superimposed
hearth
ST912
Hearth rugs do not satisfy the requirements for 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 both US and European standards. These clear-
30003842
9
Encore Woodburning Stove
A
B
ance 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 1219 mm (48”) 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.
Safe Ways to Reduce Clearances
Clearances
As with any solid fuel heating stove, extremely high
surface temperatures can occur, particularly in the
event of uncontrolled operation, e.g. if the doors
are inadvertently left open. It is crucial that sufficient clearances are allowed to any combustible
surfaces, e.g. wooden mantels or lintels, and to
timber framed (studded) walls even if they are faced
with noncombustible board. Detailed information
on fireplace and hearth construction is provided
in section 2 of Document J, all installations must
comply with these requirements or with the relevant
National or local building standards.
Clearances to timber framed (studded) walls are included below. There are no specific minimum clearances to solid noncombustible surfaces (e.g. the sides and
rear of Inglenook fire openings constructed from solid
masonry) other than to allow safe access to the controls
of the stove. For this reason minimum side clearances
of 125 mm, and a minimum rear clearance of 50 mm
are recommended.
Minimum side clearance from combustible walls
610 mm (24”) measured from the side edge of the
stove top. (Fig. 12, A)
Minimum distance from stove to movable combustible materials (e.g. furniture, drying clothes, etc.)
1220 mm (48”).
ST486a
Fig. 12 Minimum clearances.
Connecting Flue Pipe - Clearances
Single wall connecting fluepipes can reach extremely
high temperatures; therefore, clearances from the connecting fluepipe (chimney connector) must comply with
the requirements of Part J of Building Regulations 2000
(Combustion Appliances and Fuel Storage Systems).
This can be achieved by following the recommendations of Approved Document ‘J’. These are as shown in
Figure 13.
Summary of Clearances
Minimum recommended side clearances to noncombustible surfaces 125 mm (5”).
Minimum recommended rear clearance to noncombustible surfaces 50 mm (2”).
NOTE: The minimum thickness of solid noncombustible
materials is specified in section 2 of Document ‘J’, in
relation to the clearance of the appliance from the surface. As a general rule, the thickness of solid noncombustible material forming the recess of a fireplace is a
minimum of 200 mm.
Minimum rear clearance from combustible walls
(e.g. timber framed or studded walls) 1000 mm
(39³⁄₈”) measured from the rear edge of the stove
top. (Fig. 12, B)
10
30003842
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