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Vermont Castings Defiant
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 combus-
tible wall to reach the chimney, follow the recommen-
dations in the Wall Pass-Through section that follows.
The opening through the chimney wall to the flue
(the “breach”) must be lined with either a ceramic or
metal cylinder, called the “thimble”, which is cemented
securely in place. Most chimney breaches 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 ease the removal of the chimney connec-
tor system for inspection and cleaning. (Fig. 6) Thimble
sleeves should be available from your local dealer.
To install a thimble sleeve, slide it into the breach
until it is flush with the inner flue wall. Don’t extend it
into the actual flue passage, as this 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.
Chimney
Elbow
Slip Pipe
Standard
Connector
Oval to
Round Adaptor
Flue Collar
Thimble
Flue
Inner
Flue
ST492
Fig. 5 An exploded view of the chimney connection in a
freestanding masonry installation.
Thimble
Sleeve
Chimney
Connector
Flue
Keep
sleeve
end flush
with flue
tile
ST243
Fig. 6 The thimble, made of either ceramic or metal, must be
cemented securely in place.
Without a thimble, a suitable length of chimney
connector can be extended through the breach 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
.
Above the Fireplace
The Defiant may be connected to a chimney above a
fireplace opening. In such installations, the stove
stands 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. (Fig. 7)
DEFIANT
DEFIANT
*
*
Check These
Clearances
Mantel
ST244a
Fig. 7 In this installation, the chimney connector attaches to
the chimney above the fireplace opening.
Seal
This Off