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Save These Instructions
Vermont Castings • Aspen 1920 Owner's Manual_R32 • 08/17
Figure 5.4 -
The thimble, made of either ceramic or metal, must be
cemented securely in place.
ST243
thinble connection
12/13/99 djt
Chimney
Connector
Thimble Sleeve
Flue
Keep sleeve
end flush
with flue tile
The opening through the chimney wall to the flue - the
“breech” – must be lined with a ceramic or metal thimble
which is securely cemented in place.
A metal pipe section called the "thimble sleeve," slightly
smaller in diameter than standard connector and the thimbles,
will allow the removal of the chimney 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. Be sure that it does not extend
into the flue passage where it could interfere with the draft.
The thimble sleeve should protrude 1-2" (25-50 mm) into the
room. Use furnace cement and thin gasketing to seal the
sleeve in place in the thimble. Secure the chimney connector
to the outer end of the sleeve with sheet metal screws.
Connection Above the Fireplace:
In this installation, the chimney connector enters the fireplace
flue though a thimble located above the fireplace. The liner
of the fireplace chimney should extend at least to the point
at which the chimney connector enters the chimney. Follow
all the guidelines for installing a chimney connector into a
freestanding masonry chimney, and pay special attention to
these additional points:
• Check the stove and chimney connector clearances to
combustible mantel and trim materials. If necessary, use
a combination of mantel, trim, and connector heat shields
to provide the required clearances.
• Double-check connector clearance to the ceiling.
• The fireplace damper must be closed and sealed to
prevent room air from being drawn up the flue which
could reduce performance. However, it must be possible
to reopen the damper to inspect or clean the chimney.
Single-wall Chimney Connectors:
• Beginning at the flue collar of the stove, assemble the
chimney connector. Insert the first crimped end into the
stove's flue collar, and keep each crimped end pointing
toward the stove. Using the holes in the flue collar as
guides, drill 1/8" (3 mm) 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 sheet metal
screws. The predrilled holes in the top of each section of
chimney connector serve as guides when you drill 1/8"
(3 mm) holes in the bottom of the next section.
• Secure the chimney connector to the chimney. Instructions
for various installations follow.
• Be sure the installed stove and chimney connector are
correct distances from nearby combustible material.
NOTE:
Special slip pipes and thimble sleeves that form
telescoping joints between sections of chimney connector
are available to simplify assembly. Slip pipes eliminate the
need to cut individual connector sections. Consult your local
dealer about these special connector sections.
Securing the Single-wall Connector to a Prefabricated
Chimney:
Follow the installation instructions of the chimney manufacturer
exactly.
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 attach directly to
the chimney or to the chimney's ceiling support package. The
bottom of the adapter is secured to the chimney connector.
The adapter forms a union between the chimney and chimney
connector that ensures any soot or creosote falling from
the inner walls of the chimney will stay inside the chimney
connector.
Securing the Single-wall Connector to a Masonry
Chimney:
The Aspen may be connected to either a freestanding
masonry chimney or to a fireplace masonry chimney.
Freestanding Installations
If the chimney connector must pass through a combustible
wall to reach the chimney, follow the recommendations for
Wall Pass-Through construction in Figures 5.6 thru 5.10
from this section.
