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Encore Multi-Fuel Heater
2000971
ST241
chimney types
12/13/99 djt
ST241
A tile-lined
masonry
chimney
A prefabricated double-
wall insulated chimney
Fig. 3 Approved chimney types.
What Kind of Chimney to Use
You must connect the Encore Multi-Fuel to a code-ap-
proved 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.
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. 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.
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-sec-
tion causing excessive cooling of the flue gases.
DO NOT CONNECT THIS UNIT TO A CHIMNEY FLUE
SERVING ANOTHER APPLIANCE.
Chimney Size
An Encore Multi-Fuel with an 203 mm (8”) flue collar is
sized 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 Multi-Fuel with a 6” (152 mm)
flue collar is approved for venting into a masonry chim-
ney 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 Multi-Fuel is not recommended for use with
the front doors open.
Whatever the flue collar size, an Encore Multi-Fuel
may be vented into larger chimneys as well. How-
ever, 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 Multi-
Fuel 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 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 6.
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 catego-
ries:
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).