Vermont Casting 1659, 1656 Prefabricated Chimneys, Chimney Size, Chimney Connector Guidelines

Masonry Chimneys, cont’d.

•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. Openings sealed with pie plates or wallpa- per 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 local building code, or, in the absence of a local code, to a recognized national code. Ma- sonry chimneys must be lined, either with code-ap- proved masonry or precast refractory tiles, stainless steel pipe, or a code-approved, “poured-in-place” liner. The chimney clean-out door must seal tightly to ensure a good draft.

Prefabricated Chimneys

A prefabricated metal chimney must be one that is test- ed 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 Temperature (650°C) Standard ULC S-629 for Canada.

Chimney Size

This Madison is approved for venting into a masonry chimney with a nominal flue size of 8” x 8” (203 x 203mm), and into a round flue size of 8” (203mm) or 6” (152mm). It may be vented into larger chimneys as well, however, chimneys with liners larger than 8” x 12” (203 x 305mm) may experience rapid cooling of smoke and reduction in draft, especially if they are located outside the home. Such large chimneys may need to be insulated or relined for proper stove performance.

DO NOT CONNECT THIS UNIT TO A CHIMNEY FLUE SERVING ANOTHER APPLIANCE.

NOTE: DO NOT VENT THIS STOVE INTO A FAC- TORY-BUILT (ZERO-CLEARANCE) FIREPLACE. THIS STOVE HAS NOT BEEN TESTED AND LISTED FOR THAT TYPE OF INSTALLATION. FACTORY-BUILT FIREPLACES AND THEIR CHIMNEYS ARE SPECIFICALLY DESIGNED AS A UNIT FOR USE AS FIREPLACES. IT MAY VOID THE LISTING OR BE HAZARDOUS TO ADAPT THEM FOR ANY OTHER USE.

DO NOT CONNECT THE STOVE TO ANY AIR DISTRIBUTION DUCT OR SYSTEM.

Vermont Castings Madison

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 a masonry or prefabricated structure that encloses the flue. Chimney connectors are used only to make the connection from the stove to the chimney. They are for interior use only.

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, and should be 6” (150mm) in diameter. Do not use galvanized chimney connector; it cannot withstand the high temperatures that can be reached by smoke and exhaust gases, and may release toxic fumes under high heat.

If possible, do not pass the chimney connector through

a combustible wall or
ceiling. If passage
through a combustible	Toward
wall is unavoidable,	stove
refer to the recommen-
dations in the sec-
tion following on Wall
Pass-throughs. Do
not pass the connec-		Flue gas
tor through an attic, a
		direction
closet or any similar
concealed space. The		ST242
whole chimney con-
nector should be ex-	Fig. 4 Chimney connector.
posed and accessible

for inspection and cleaning.

Install the single wall chimney connector not less than 23” (585mm) from the ceiling. Keep it as short and direct as possible, with no more than two 90 degree turns. If possible, use 45 degree elbows. Slope horizon- tal runs of connectors upward 1/4” per foot (20mm per meter) going from the stove toward the chimney. The recommended maximum length of a horizontal run is 3 feet (1 meter), and the total length of chimney connec- tor should be no longer than 8’ (2.5m).

In cathedral ceiling installations, extend the prefabricat- ed chimney downward to within 8’ (2.5m) of the stove.

SAFETY NOTE: ALWAYS WEAR GLOVES AND PRO- TECTIVE EYEWEAR WHEN DRILLING, CUTTING OR JOINING CHIMNEY CONNECTOR SECTIONS .

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