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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, Figure 2.5. Thimble sleeves are
available from your local dealer.
Thimble Sleeve
Chimney
Connector
Figure 2.5 - The thimble, made of either ceramic or metal, must
be cemented securely in place.
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
ST243
flue passage, as this could interfere with the draft.
thinble connection
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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.
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.
E. Fireplace Installations
The chimney connector may be connected to the chimney
above the fireplace opening or through the fireplace.
Above the Fireplace
Your appliance may be connected to a chimney above a
fireplace opening, Figure 2.6. 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 in 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 mantel and the
chimney connector, and any combustible trim or the
mantel.
• Check the clearance between the chimney connector
and the ceiling. the clearance between the connector
pipe and the ceiling should be at least 30" (762 mm).
9
Vermont Castings • Defiant® Model 1975-CAT-C Installation Manual_R12 • 11/21
Flue
Keep sleeve
end flush with
flue tile
Figure 2.6 - In this installation, the chimney connector attaches to
the chimney above the fireplace opening.
• 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.
Through the Fireplace
If your fireplace opening height is at least 29" (737 mm),
you may install your appliance through the opening using
a "positive connection" kit, available from your local dealer.
Positive connection kits ensure a tight fit between the stove
flue collar and the chimney flue, Figure 2.7.
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 fireplace installations on Page
12.
Floor protection requirements also apply to fireplace
installations. Refer to the "Floor Protection" section in this
manual.
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 pass-throughs. If
using one of these, make sure it has been tested and listed
for use as a wall pass-through.
Check These
Clearances
*
*
Mantel
Seal
This Off
ST244
Plymouth
fplc over mantel
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8390-975
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