Vermont Castings Encore 1450 Mounting instructions
2425
Encore NC Cover
5/05
Homeowner’s
Installation and
Operating Manual
30002425 2/10 Rev. 23
Encore
Non-Catalytic
Woodburning Stove
Model 1450
2
Encore 1450 Non-Catalytic Woodburning Stove
30002425
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 MHSC, 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 pro-
vide 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 func-
tionality, due to cast iron’s unique capability to absorb and radiate heat.
Also, MHSC 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 manu-
facturer and the operator. Please read this manual carefully to understand how to properly operate and maintain your stove
or fireplace.
At MHSC, 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 fac-
tory-trained and knowledgeable about every MHSC 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 MHSC
This manual describes the installation, operation, and
maintenance of the Vermont Castings Encore Model 1450
non-catalytic 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 10,600 to 24,050 Btu/hr.
The Encore Model 1450 has been tested and is safety
listed by OMNI-Test Laboratories of Portland, Oregon.
The test standards are ANSI/UL-1482 and ANSI/UL-737
for the United States, and ULC S627. The Encore is listed
for burning wood. Do not burn other fuels.
We recommend that you hire a professional installer certi-
fied by the Wood Heat Education and Research Founda-
tion (WHERF) or the Wood Energy Technical Training
(WETT) to install your stove, or to advise you on the instal-
lation 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.
Warming Shelves
#0200 Classic Black #0205 Biscuit
#0201 Bordeaux #0206 Chestnut Brown
#0202 Sand #0207 Ebony
#0203 Midnight Blue #0208 Brown Majolica
#0204 Suede Brown #0209 Vt. Classic Green
# 0127 Sparkscreen
# 0171 Horizontal Collar Heat Shield
# 0174 Vertical Collar Heat Shield
# 3265 Outside Air Kit
# 0336 Mobile Home Kit
# 2767 Variable Speed Fan Kit
# 0168 - 0169 Heat Shields for the Chimney Connec-
tor
- Matching Porcelain Stovepipe
- Matching 6” Flue Collar
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 de-
fects and other reproductive harm.
California Health & Safety Code Sec. 25249.6
Specifications ................................. 3
Installation ...................................... 4
Assembly ...................................... 18
Operation ...................................... 20
Maintenance ................................. 27
Replacement Parts ....................... 31
Warranty ....................................... 35
3
Encore 1450 Non-Catalytic Woodburning Stove
30002425
16M"
(44 mm)
25"
(635 mm)
Top exit
flue collar
height
27"
(686 mm)
256M"
(654 mm)
1856O"
(470 mm)
756M"
(184 mm)
27"
(686 mm)
2256M"
(565 mm)
1556O"
(394 mm)
5"
(127 mm)
2(6" (73 mm)
236M"
(603 mm)
15"
(381 mm)
36M"
(95 mm)
226M"
(578 mm)
Encore 1450
dimensions
Encore dimensions.
Drawings Not to Scale
Range of heat output ............ 10,600 to 24,050 BTU/hr*
Maximum heat output ..........................50,000 BTU/hr**
EPA emissions ratings, g/hr, non-catalytic ...............0.7*
Area heated*** ............... Up to 1900 sq. ft. (175 sq. m.)
Fuel size/type ...................................20” (508 mm) logs
Fuel capacity ........................................... 40 lbs. (18kg)
Loading ....................................................... Front or top
Chimney connector:
for 8” oval flue collar ................ 8” (203 mm) diameter
for optional 6” flue collar .......... 6” (152 mm) diameter
Chimney flue size:
for 8” oval flue collar ................8” (203 mm) minimum
for optional 6” flue collar ..........6” (152 mm) minimum
Flue exit position........................ Reversible, top or rear
Primary air ............................................. Manual control
Secondary air .............................. Fixed, Self-regulating
Ash handling system ..................... Removable ash pan
Glass panel......... High-temperature, IR coated ceramic
Weight ................................................ 395 lbs. (179 kg)
Width (leg-to-leg) ..................................... 27” (686 mm)
Depth (leg-to-leg)..................................... 15” (381 mm)
Height to top of flue collar, (6” or 8”)
Top exit .............................................. 25¹⁄₄” (641 mm)
Rear exit ............................................ 26¹⁄₂” (673 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 nonstan-
dard construction (e.g. unusually well-insulated, not in-
sulated, 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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Before you begin an installation, be sure that:
• Your stove and chimney connector will be far
enough from combustible materials to meet all
tested clearance requirements.
• The floor protector is large enough and is con-
structed properly to meet all tested requirements.
• You have all necessary permits from local author-
ities.
Your local building official is the final 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
every Vermont Castings’ stove indicates the stove has
been tested and meets current UL and ULC safety
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.
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 avail-
able 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 in-
let of the stove is required for new construction in some
areas. The Encore NC is equipped with an outside con-
nection as standard equipment.
Pressure variations within the house do not affect a
stove equipped with an outside air supply, and im-
proved stove performance often results. An Outside Air
Adapter Kit for the Encore is available from your local
Vermont Castings dealer.
Altitude affects chimney performance. When using a
6” flue collar on the Encore NC, refer to Figure 2 for
suggested chimney heights at various altitudes. Chim-
ney height should be measured from the flue collar to
the top of the chimney. The recommended minimum
chimney height is 16’ (4.9 m).
30
25
20
15
0 2000 4000 6000 8000 10000 12000
Height (ft.)
Altitude (ft.)
ST491
Defiant
chimney height
11/2/00 djt
6“
ST491
Chimney height requirements for Encore when
equipped with a 6” chimney.
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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
chimney types
12/13/99 djt
ST241
A tile-lined
masonry
chimney
A prefabricated double-
wall insulated chimney
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.
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. Open-
ings sealed with pie plates or wallpaper are a hazard
and should be sealed with mortar or refractory cement.
In the event of a chimney 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.
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-103-
1985 (2100°F) for the United States, and High Temper-
ature (650°C) Standard ULC S-629 for Canada.
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
305mm), 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).
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 305 mm) 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'
AC617
RLTSKC8
2/11/98
Reference
Point AC617
The 2’-3’-10’ Chimney Rule.
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A chimney connector is the double-wall or single-wall
pipe that connects the stove to the chimney. The chim-
ney 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 con-
nectors 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 the
stove’s exhaust gases, and may release toxic fumes
under high heat. The connector may be 6” (152mm) or
8 “ (203mm) in diameter.
If possible, do not pass the chimney connector through
a combustible wall or ceiling. If passage through a com-
bustible wall is unavoidable, refer to the 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 in-
spection and cleaning.
In horizontal runs of chimney connector, maintain a dis-
tance of 24” (610mm) 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
(6mm per meter) going from the stove toward the chim-
ney. The recommended maximum length of a horizontal
run is 3’ (1m), and the total length should be no longer
than 8’ (2.4m). In cathedral ceiling installations, extend
the prefabricated chimney downward to within 8’ (2.4)
of the stove.
• 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 sec-
tion 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 bot-
tom of the next section.
• Secure the chimney connector to the chimney. In-
structions for various installations follow.
• Be sure the stove and chimney connector are in-
stalled at the correct distances from nearby com-
bustible materials as per tested clearance. Refer to
Encore Clearance Diagrams.
ST242
Chimney connector
12/13/99 djt
the crimped end
of the connector points
toward stove.
Special slip pipes and thimble sleeves that form
telescoping joints between sections of chimney con-
nector are available to simplify installations. They often
eliminate the need to cut individual connector sections.
Consult your local dealer about these special pieces.
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.
For installations us-
ing double-wall connectors,
minimum clearances must
conform to the listed clear-
ances in the clearance chart
on Page 15.
If the Encore is equipped with
the 8” flue collar, an oval-
to-round adapter will be needed. Double-wall oval-to-
round adapters are available from some manufacturers.
Your local dealer can help you select the right connec-
tor.
Follow the installation instructions of the chimney
manufacturer exactly as you install the chimney. The
manufacturer of the chimney will supply the acces-
sories 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
which connect the prefabricated chimney to the chim-
ney connector. The top of such adapters attach directly
to the chimney or to the chimney’s ceiling support pack-
age, 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 fall-
ing from the inner walls of the chimney will stay inside
the chimney connector.
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ST492
Defiant
freestanding
installation
11/00
Chimney
Elbow
Slip Pipe
Standard
Connector
Oval to
Round Adapter
Flue Collar
Thimble
Flue Liner
Flue
ST492
An exploded view of the chimney connection in a free-
standing masonry installation.
Both freestanding masonry chimneys and fireplace ma-
sonry chimneys may be used for your installation.
If the chimney connector must pass through a combus-
tible wall to reach the chimney, follow the recommen-
dations in the Wall Pass-Through section later in this
manual.
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 are 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.
ST243
thinble connection
12/13/99 djt
Thimble Sleeve
Chimney Connector Flue
Keep
sleeve
end flush
with flue
tile
ST243
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 gasket-
ing 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 con-
nector 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.
The chimney connector may be connected to the
chimney above the fireplace opening or through 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 addi-
tion, 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” (610mm). To find out
how much this clearance may be reduced with heat
shields, refer to the clearance chart on Page 15.
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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
ST244
Plymouth
fplc over mantel
12/99
*
*
Chimney
Connector Shields
Mantel
Seal Damper
to Air Flow
ST244
Fig. 8 In this installation, the chimney connector is attached
to the chimney above the fireplace opening.
If your fireplace opening height is at least 26¹⁄₂"
(675mm), you may install an Encore through the open-
ing 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 fire-
place installations on Page 12 and Figure 16.
Floor protection requirements also apply to fireplace
installations. This information is on Page 10.
Whenever possible, design your installation so the con-
nector 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 pass-
throughs. If using one of these, make sure it has been
tested and listed for use as a wall pass-through.
ST245
fireplace
flex connector
12/99
Flexible Connector
Mantel Shield
Fireplace Adapter
Kit “Positive Con-
nection”
ST245
In this installation, the chimney connector enters the
fireplace opening and then connects to the chimney.
the National Fire Protection As-
sociation (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”
(229mm) clearance to combustibles.
• Placing a section of chimney connector inside a
ventilated thimble, which in turn is separated from com-
bustibles by 6” (152mm) of fiberglass insulating mate-
rial.
• Placing a section of chimney connector inside a
section of 9” (230mm) diameter, solid-insulated, factory-
built chimney, with 2” (50mm) of air space between the
chimney section and combustibles.
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” (457mm) clear-
ance for the connector. The resulting space must re-
main 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” (25mm) clear of the wall.
9
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DEF
IA
N
T
ST493
Brick pass thru
11/00
Wall Stud
Chimney
Connector
12” Noncombustible
Material
Floor Pro-
tection
ST493
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.
Do not vent your Encore into a factory-built
(zero-clearance) fireplace. These appliances together
with their specific chimneys are designed as a sys-
tem for use as fireplaces. It may void the listing or be
hazardous to adapt factory-built fireplaces for any other
use.
T
ST494
steel
wall pass thru
11/00
18” (460mm) clear
space all around
the pipe
ST494
An approved wall pass-through for Canada.
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 bottom heat
shield. Spark, ember and thermal protection must be
provided by a floor protector constructed with noncom-
bustible material as specified.
Most installations will require the bottom heat shield be
attached. Only when the stove is placed on a complete-
ly 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 installation with the heat shield attached, use an
approved 1/2” (13 mm) noncombustible hearth pad with
k = 0.84 BTU in/ft2hr °F or an equivalent material with
an R-value of at least 0.59. (Refer to “How to Determine
if Alternate Floor Protection Materials are Acceptable”
section) The floor protector may be covered with a
decorative noncombustible material if desired. Do not
obstruct the space under the heater.
Protection requirements vary somewhat between the
Untied States and Canada as follows:
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 45” deep.
A noncombustible floor protector is required
under the stove as well. The floor protector must
extend 18” (450 mm) to the front (“F”, Fig. 12), and 8”
(200 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 49” (1245 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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How to Determine if Alternate Floor
Protection Materials are Acceptable
All floor protection must be noncombustible (i.e. met-
als, brick, stone, mineral fiber boards, etc.). Any organic
materials (i.e. plastics, wood paper products, etc.) are
combustible and must not be used. The floor protection
specified includes some form of thermal designation
such as R-value (thermal resistance) or k-factor (ther-
mal conductivity).
Procedure:
1. Convert specifications to R-value:
i. R-value given - no conversion needed.
ii. k-factor is given with a required thickness (T) in
inches:
iii. K-factor is given with a required thickness (T) in
inches:
iv. r-factor is given with a required thickness (T) in
inches: R = r x T
2. Determine the R-value of the proposed alternate
floor protector:
i. Use the formula in Step 1 to convert values not
expressed as R.
ii. For multiple layers, add R-values of each layer to
determine overall R-value.
3. If the overall R-value of the system is greater than
the R-value of the specified floor protector, the alter-
nate is acceptable.
EXAMPLE: The specified floor protector should be 1/2-
inch thick material with k-factor of 0.84. The proposed
alternate is 4” brick with an r-factor of 0.2 over 1/8”
mineral board with a k-factor of 0.29
Step a: Use formula above to convert specification to
R-value:
Step b: Calculate R of proposed system.
4” brick of r = 0.2, therefore:
Rbrick = 0.2 x 4 = 0.8
1/8” mineral board of k = 0.29, therefore
Rmineralboard = x 0.125 = 0.431
Rtotal = Rbrick + Rmineralboard = 0.8 + 0.431 = 1.231
Step c: Compare proposed system Rtotal of 1.231 to
specified R of 0.59. Since proposed system Rtotal is
greater than required, the system is acceptable.
Definitions
R = x T
1
K x 12
R = x T = x 0.5 = 0.59
1
k
1
0.84
1
0.29
r = =
(ft2)(hr)(°F)
(Btu)(in) 1
k
(Btu)(ft)
(ft2)(hr)(°F)
K =
k = = K x 12
(Btu)(in)
(ft2)(hr)(°F)
R = (ft2)(hr)(°F)
Btu
R = x T
1
k
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” (406 mm)
from the front in the United States and 18” (450 mm)
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.
D
E
A
B
A
E
C
ST500
Encore
floor protection
2/23/01
E
F
E
F
A. 39” 43” (1092 mm)
B. 45” 49” (1245 mm)
C. 12” 12” (305 mm) 8” Connector
10” 10” (255 mm) 6” Connector
D. 6” 8” (200 mm)
E. 6” 8” (200 mm)
F. 16” 18” (450 mm)
ST500
Required floor protector dimensions for both top-and
rear-exiting stove.
11
Encore 1450 Non-Catalytic Woodburning Stove
30002425
Both a stove and its chimney connector radiate heat in
all directions when operating, and dangerous overheat-
ing 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 test-
ing to UL and ULC standards. These clearance require-
ments must be strictly observed.
In addition, furnishings and other combustible materi-
als must be kept away from the stove. In general, a
distance of 48” (1219mm) must be maintained between
the stove and moveable combustible items such as dry-
ing clothes, furniture, newspapers, firewood, etc. Keep-
ing those clearance areas empty assures that nearby
surfaces and objects will not overheat.
The Encore 1450 includes a bottom heat shield that is
needed in most installations. Refer to Page 9 for more
information on required floor protection. In addition, top
exit installations that do not include wall protection must
include a vertical flue collar heat shield. (Consult clear-
ance chart on Page 15.) The vertical flue collar heat
shield is sold as a separate accessory.
In general, the greatest clearance is required when you
place a stove and its connector without accessory heat
shields near walls without heat shields.
For example, when the Encore is installed parallel to
the rear wall and no shields are used, the rear edge
of the top must be at least 29” (737 mm) from the wall
behind it and at least 17” (432 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 28”
(711 mm) from nearby walls.
The least clearance is required when the connector, as
well as the wall, have heat shields or when a double
wall connector and wall shields are used.
When shields are attached to the stove or chimney
connector, they are mounted away from the stove or
connector surface on noncombustible spacers. Air flow-
ing between the stove (and/or chimney connector) and
attached shields carries away heat. Do not block the air
flow by filling these gaps with any 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.
ST247
Rear exit floor dgrm
12/14/99 djt
Wood framing requires pro-
tection from radiant heat ST247e
Combustible supporting timbers may lie beneath
fireplace hearths, requiring additional floor protection.
Clearance requirements are established to meet every
installation possibility, and they involve the combination
of four basic variables:
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" (90mm) side down.
Shields must be spaced out from the combustible
surface 1" (25 mm) on noncombustible spacers, as in
Figure 14. The spacers should not be directly behind
the stove or chimney connector.
12
Encore 1450 Non-Catalytic Woodburning Stove
30002425
ST248
wall shield construction
12/14/99 djt
Air Flow
Stud Wall
Framing
Wall Shield
Noncombustible
Spacer and
Fasteners
Drywall
Airflow
Metal
Screening
Wall
Shield
Metal Lathe or
Noncombustible
Spacers
ST248
Approved wall shield construction.
1" (25mm)
1/4" (6mm)
ST501
mantel and
trim shield
11/10/00 djt
ST501
A custom formed mantel shield.
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.
Chimney Connector Heat Shields should be used 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 36” (914 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 chim-
ney, 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 con-
structed of 24 gauge or heavier sheet metal, and must
be centered on the chimney.
A fireplace installation requires special clearance be-
tween 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 clear-
ance of 38” (965 mm), measured from the stove’s top
plate. With a ventilated shield, this clearance may be
reduced safely to 22” (559 mm).
Unprotected top trim (B) protruding 3/4” (19 mm) or less
from the face of the fireplace must be a minimum of 27”
(686 mm) from the stove’s top surface. With a ventilated
trim shield, this clearance may be reduced safely to 20”
(508 mm).
Unprotected side trim (C) that protrudes 3/4” (19 mm)
or less fr
om the face of a fireplace must have a minimum
clearance of 10” (254 mm), measured from the stove’s
top side edge. If the trim extends more than 3/4” (19 mm),
it is subject to the requi
rements for wall clearance.
The charts and sample installations that follow list all
the clearances required for the various installation con-
figurations of the Encore.
13
Encore 1450 Non-Catalytic Woodburning Stove
30002425
ST253b
Encore
trim clearances
02/01 djt
CC
AB
D
Unprotected Protected
A. Mantel 38” (965 mm) 22” (559 mm)
B. Top Trim 27” (686 mm) 20” (508 mm
C. Side Trim 10” (254 mm) --
D. Side Wall 18” (457 mm) 8” (203 mm)
ST253b
Maintain clearances to combustible components of
the mantelpiece.
Side
Wall
Because of their restricted air flow and heat reten-
tion characteristics, alcove installations have specific
construction requirements and special clearances. No
rear stove or chimney connector heat shields are used
in alcove installations. Bottom heat shield requirements
remain the same as for other installations.
The following illustrations show noncombustible ceiling
framing and maximum and minimum permitted dimen-
sions for alcove construction.
36"
Max.
48" Min.
ST502
Intrepid
Alcove floor plan
11/10/00 djt
Use recommended
floor protection
7/16” Durock®
(or equivalent)
spaced 1” off
wood studs on
noncombustible
spacers
ST502
Floor plan. Sheetrock on front face butts to Durock®
(or equivalent) alcove lining.
ST503
Alcove side view
11/10/00 djt
Joist Shield
(Supplied
by Chimney
Manufac-
turer)
Metal
Stud
1” Air gap top
to bottom, on
both sides and
back wall
7/16” Durock®
(or equivalent)
Combustible
facing may
overlap metal
studs by 1”
ST503
Alcove side section.
14
Encore 1450 Non-Catalytic Woodburning Stove
30002425
St504
Alcove cutaway
11/00
ST504
Cutaway perspective of acolve installation.
63" 60" Min.
to Alcove
Ceiling
ST506
Alcove front view
11/00
Ceiling sup-
port package
extends 2”
below Durock®
(or equivalent)
ceiling
1” air gap,
top and bot-
tom, on both
sides and
back wall
From
60” to 63”
must be
covered by a
noncombus-
tible material. ST506
Front Section; 63” min. clearance from finished floor
surface to combustibles on front face. Combustible facing
may overlap metal studs by only 1”. It should not extend be-
low the height of the noncombustible ceiling.
2156O"
1456M"
43" Min.
12"
Min.
36"
Max.
ST505
Alcove Ceiling plan
11/00
Existing Combus-
tible Framing
Metal studs
support 7/16”
Durock® (or
equivalent)
ceiling
ST505
Reflected ceiling plan.
15
Encore 1450 Non-Catalytic Woodburning Stove
30002425
21” (533 mm) 7” (178 mm)
9” (229 mm) 3” (76 mm)3
6” Connector 8” Connector
15” (381 mm) 9” (229 mm) *
(A) 17” (B) 29” (C) 28” (D) 8”1,4 (E) 15”1,4 (F) 8”1,4
(432 mm) (737 mm) (711 mm) (203 mm) (380 mm) (203 mm)
(G) 17” (H) 17” (I) 19” (J) 8”1 (K) 11”1 (L) 7”1
(432 mm) (432 mm) (483 mm) (203 mm) (280 mm) (178 mm)
(M) 18” (N) 24”5 N/A (P) 8” (Q) 6” Collar N/A
(457 mm) (610 mm) (203 mm) 11” (279 mm)
8” Collar
19” (483 mm)
(G) 18” (H) 6” Collar (I) 19”
(457 mm) 23” (584 mm) (483 mm) *
8” Collar
17” (432 mm)
Single-wall connector,
No chimney connector
heat shields
Single-wall connector,
Chimney connector heat
shields installed
Double-wall connector
All Installations (S) 48” (1219 mm)
* Clearances with double-wall connectors and protected surfaces have not been tested for the Encore NC.
1. A ceiling heat shield, 24” (610 mm) in diameter and suspended 1” (25 mm) from the ceiling, must surround the chimney connec-
tor in installations in which the chimney connector penetrates the ceiling.
2. The chimney connector shield extends only to 36” (914 mm) above the flue collar.
3. The ceiling heat shield required when the chimney connector shields are used should meet the wall protector. This will require
trimming the ceiling shield along the line of intersection with the wall protector.
4. The vertical collar heat shield is not required when wall protection is installed according to this manual.
5. All rear exit installations require a wall shield when combustible material is within 12” (305 mm) of the center of the rear wall
pass through. The shield must be 24” (610 mm) in diameter, be spaced 1” (25 mm) from the wall and must surround the chim-
ney connector.
For use with either 6” or 8” flue collar/chimney connection
Top Exit, single wall con-
nector without shields,
vertical flue collar heat
shield installed (except
where noted)
single-wall
chimney connector heat
shields2, vertical flue col-
lar h.s. installed
double-wall
chimney connector,
vertical flue collar heat
shield installed
16
Encore 1450 Non-Catalytic Woodburning Stove
30002425
, No Stove Heat Shields, collar heat shield installed.
D
E
F
F
C
C
A
B
J
K
L
L
I
I
G
H
ST628
Encore Clearance
Diagrams
02/01
P
Q
M
N
N/A N/A
, vertical collar heat shield, and chimney connector heat shields or double-wall connector.
.
For use with either 6” or 8” flue collar/chimney connector
17
Encore 1450 Non-Catalytic Woodburning Stove
30002425
E
E
C
B
A
BD
ST629a
Encore
wall shield AA
02/01
EE
A = 30” (762 mm)
B = 44” (1118 mm)
C = 36” (910 mm)
D = 66” (1676 mm)
E = 1” (25 mm)
ST629a
Maximum reduction
for both rear and side wall. Wall shields may meet at corner if
desired. A heat shield 24” (610mm) in diameter suspended 1”
(25mm) below the ceiling must surround the chimney.
A
B
C
BA
C
ST630
Enc
Wall shield
B
02/01
A = 48” (1219 mm)
B = 36” (910 mm)
C = 1” (25 mm)
ST630
Reduced clearances to 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. (See “Special Installations”)
B
C
D
A
C
ST630a
Encore
Wall shield
BB
02/01
E
FF
A = 30” (762 mm)
B = 23” (584 mm)
C = 44” (1118 mm)
D = 66” (1676 mm)
E = 36” (910 mm)
F = 1” (25 mm)
ST630a
Wall shields may
meet at corner if desired. Connector shield extends 36” (914
mm) above flue collar, or to the elbow whichever is less.
Height “D” must be 66” (1676mm) or reach the thimble. Pass-
through must comply with codes. (See “Special Installations”.)
B
A
D
E
C
E
D
A
ST631
Encore
Wall shield
C
02/01
B
EE
A = 29” (737 mm)
B = 45” (1143 mm)
C = 16” (406 mm)
D = 36” (910 mm)
E = 1” (25 mm)
ST631
Wall shields
MUST meet at corner. Connector heat shield extends 36”
(914 mm) above flue collar. A 24” (610 mm) diameter ceiling
heat shield must surround the chimney and be suspended 1”
(25 mm) from ceiling.
B
A
D
E
C
E
D
A
ST631a
Encore
Wall shield
CC
02/01
B
EE
A = 29” (737 mm)
B = 45” (1143 mm)
C = 16” (406 mm)
D = 36” (910 mm)
E = 1” (25 mm)
ST631a
Reduced side clearances. Wall shields
MUST meet at corner. A 24” (610 mm) diameter ceiling heat
shield must surround the chimney and be suspended 1” (25
mm) from ceiling.
E
E
CB
A
B
D
ST629
Encore
wall shield
02/01
A = 30” (762 mm)
B = 48” (1219 mm)
C = 66” (1676 mm)
D = 36” (910 mm)
E = 1” (25 mm)
ST628
Reduced clearances for both rear and side
walls. Wall shields may meet at corner if desired. Shielding for
connector is centered behind connector.
18
Encore 1450 Non-Catalytic Woodburning Stove
30002425
The information on this page is helpful in planning stove placement for top-exiting installations, particularly those in-
stallations with chimneys that pass through the ceiling. However, this is not a clearance chart. Final stove clearances
must adhere to the guidelines stated in the clearance chart on Page 15.
Dimensions indicated are valid for installations with either 6” or 8” flue collars.
Side (A) Rear (B) Corner (C) Side (D) Rear (E) Corner (F)
30¹⁄₂” 13¹⁄₄” 25¹⁄₂” 21¹⁄₂” 7¹⁄₄” 13¹⁄₂”
(775 mm) (337 mm) (648 mm) (546 mm) (184 mm) (343 mm)
**To locate center of flue collar for corner installation, add 6¹⁄₂” (165 mm) to the clearance distance from stove corner to wall.
Mark off the resulting distance from the corner along both walls. Next, measure the same distance from these two points out
from the walls. These last two measurements will meet at a point representing the center of the flue collar. Refer to the dia-
grams above.
ST632a
ST632a
Encore
flue centerline
Diagrams
02/01
ABCDEF
Side (a) Rear (B) Side (A) Side (D) Rear (E) Corner (F)
30¹⁄₂” 25¹⁄₄” 34¹⁄₂” 21¹⁄₂” 11¹⁄₄” 14¹⁄₂”
(775 mm) (641 mm) (876 mm) (546 mm) (286 mm) (368 mm)
* This distance, from the center of the flue collar to the front edge of the hearth, is the same for all installations on this page:
35¹⁄₄” in the United States and 37¹⁄₄” (946 mm) in Canada.
ST632
ST632
Encore
flue centerline
Diagrams
2/01
*
ABC
*
DEF
19
Encore 1450 Non-Catalytic Woodburning Stove
30002425
Cast iron stoves are heavy, and it will take two to four
people to move your Encore into position.
Wipe the protective
coating of oil from
the griddle with a
clean dry rag or a
paper towel.
Install the handle
on the griddle.
First, place the
griddle upside
down at the edge
of a flat surface and
assemble the handle as shown.
With the handle pointing 45° from its final position,
tighten the nut as far as possible with the pliers. Move
the handle to its final position while still holding the nut
with the pliers.
The Bottom Heat Shield is required in most in-
stallations. Refer to Floor Protection, Page 9, for further
details.
1. Remove the four 10-24 x 1/2” hex head bolts from
the corners of the ash drop on the stove bottom.
2. Align the bottom heat shield against the spacers with
the outside air knockout hole toward the rear of the
stove.
3. Secure the shield with the four (4) hex head bolts
removed from the stove bottom previously.
4. Tighten securely.
Lift the stove slightly so there is no weight on the leg
while making the adjustment.
Reverse the flue collar by removing the two (2) screws
that attach it to the back of the stove. Be sure the gas-
ket around the flue collar opening is in position when
you screw the collar back onto the stove.
The primary air thermostat handle is the smaller of the
two black handles. Secure the handle to the stub on
the right side of the stove with an 8-32 x 2” slot head
machine screw.
Use the 1/4” -20 x 3” screw to attach the damper handle
to the damper stub on the left side.
The white removable insert handle opens and closes
the front doors. Remove after each use so it won’t get
hot. Store it in the handle holder installed behind the
right front leg. Assemble the handle by passing the 3³⁄₈"
screw through the ceramic shaft and into the bright
metal nub. Tighten carefully until snug.
ST516
Attach
griddle handle
11/17/00 djt
ST516
Attach the griddle handle.
ST540
Assembly
handle
11/00
ST540
Assemble the front door handle.
ST635
Encore
Install thermostat
handle
2/01
ST635
Attach thermostat handle.
ST853
Use four (4) bolts to attach the bottom heat shield.
Rear
Bottom Heat
Shield
Bolts
20
Encore 1450 Non-Catalytic Woodburning Stove
30002425
1. Remove the sheet metal outer back shown in Figure
32.
2. Attach the fan assembly at the bottom edge of the in-
ner back with two (2) 1/4-20 x 3/4” hex head screws
and one (1) 1/4” star washer.
3. Attach snapstat to the mounting holes on the un-
derside of the bottom with two (2) 1/4-20 pan head
screws.
4. Attach the rheostat holder, (provided with stove),
under the right wing of the bottom heat shield with
two (2) #10 sheet metal screws.
5. Attach the rheostat to its holder by inserting the
rheostat control shaft through the holder hole. Install
the retaining ring and rheostat onto the shaft.
6. Secure the rheostat cable to the underside of the
bottom heat shield using the wire tie provided on the
hole at the right rear edge of the heat shield.
7. Fan will not operate until stove reaches approximate-
ly 109°F.
8. Replace the sheet metal outer back.
Fan installation (Kit # 2767).
34
FANINSTALL
Rheostat
Knob
Rheostat
Snapstat Screws ST848
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