Vermont Casting 1990CE Masonry Chimneys, Prefabricated Chimneys, Chimney Size

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, or blockage. Repair any defects before using the chimney with your stove.

Seal any unused openings in an existing masonry chim- ney with masonry to the thickness of the chimney wall, and repair the chimney liner. Openings sealed with pie plates or wallpaper are a hazard; seal them 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 ma- sonry 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 Intrepid II is approved for venting into a masonry chimney with a maximum flue size of 200 x 200 mm (8” x 8”), and into a round flue size of 150 mm (6”).

It may not be vented into larger chimneys without a liner to reduce the effective flue size to 150 mm (6”) diam- eter. Larger chimneys must have their flues relined for proper stove performance.

Accessories to make the connection between stainless steel chimney liners and your Intrepid II are available through your local dealer.

Chimney Connector Guidelines

Chimney connector is the double-wall or single-wall pipe that connects the stove to the chimney. The chim- ney is a masonry or prefabricated structure that enclos- es the flue. Chimney connectors are used only to make the connection from the stove to the chimney.

Intrepid II Woodburning Stove

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).

Flue Pipes with a spigot and socket joint should be fitted with the socket facing upwards, to contain con- densates and moisture within the flue. Joints should be made gas tight using proprietary jointing accessories, or, where appropriate, by packing joint with noncombus- tible rope and fire cement.

Double-wall chimney connectors must be tested and listed for use with solid-fuel burning appliances. Sin- gle-wall chimney connectors should be made of 24 gauge or heavier steel, and should be 150 mm (6”) in diameter. Do not use galvanized connector; it cannot withstand the high temperatures that can be reached by smoke and 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 com- bustible wall is unavoidable, refer to the section follow- ing on Wall Pass-Throughs. Do not pass the chimney connector through an attic, a closet, or any similar con- cealed space. The whole connector should be exposed and accessible for inspection and cleaning.

In horizontal runs of single-wall chimney connector without protective shields, maintain a clearance of at least 660 mm (26”) from the ceiling.

Keep the horizontal run of chimney connector as short and direct as possible, with no more than two 90° turns. Slope horizontal runs of connector upward 20 mm per m (1/4” per foot) going from the stove toward the chim- ney. The recommended maximum length of a horizontal run is 914 mm (36”). The recommended total length of chimney connector is 2.4 m (8’).

In cathedral ceiling installations, extend the prefabri- cated chimney down to within 2.4 m (8’) of the stove.

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

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