Masonry Chimney Requirements

1.If a vent (common or dedicated) becomes blocked, the fur- nace will be shut off by the draft safeguard switch located on the vent elbow.

2.Do not connect this Category I furnace into a single-wall dedicated or common vent. The dedicated or common vent is considered to be the vertical portion of the vent system that terminates outdoors.

3.Vent connectors serving Category I furnaces shall not be connected into any portion of a mechanical draft system operating under positive pressure.

4.Do not vent this appliance with any solid fuel burning ap- pliance.

5.Category I furnaces must be vented vertically or nearly vertically unless equipped with a listed power venter.

6.Do not vent this appliance into an unlined masonry chim- ney. Refer to Chimney Inspection Chart, Fig. 27.

NOTE: These furnaces are CSA design-certified for use in exterior clay tile-lined masonry chimneys with a factory accessory Chimney Adapter Kit. Refer to the furnace rating plate for correct kit usage. The Chimney Adapter Kits are for use with ONLY furnaces having a Chimney Adapter Kit numbers marked on the furnace rating plate.

If a clay tile-lined masonry chimney is being used and it is exposed to the outdoors below the roof line, relining might be required. Chimneys shall conform to the Standard for Chimneys, Fireplaces, Vents, and Solid Fuel Burning Appliances ANSI/NFPA 211-2009 and must be in good condition.

U.S.A.-Refer to NFPA 54/ANSI Z223.1-2009 Sections 13.1.8 and 13.2.20 of the NFGC or the authority having jurisdiction to determine whether relining is required. If relining is required, use a properly sized listed metal liner, Type-B vent, or a listed alternative venting design.

NOTE: See the NFPA 54 / ANSI Z223.1-2009, 13.1.8 and

13.2.20regarding alternative venting design and the Exception, which cover installations such as the Chimney Adapter Kits which are listed for use with these furnaces. The Chimney Adapter Kit is listed alternative venting system for these furnaces. See the kit instructions for complete details. See Table 17 for accessory list.

This furnace is permitted to be vented into a clay tile-lined masonry chimney that is exposed to the outdoors below the roof line, provided:

1.Vent connector is Type-B double-wall, and

2.This furnace is common vented with at least 1 draft hood equipped appliance, and

3.The combined appliance input rating is less than the max- imum capacity given in Table 8 , and

4.The input rating of each space heating appliance is greater than the minimum input rating given in Table 9 for the local 99% Winter Design Temperature. Chimneys having internal areas greater than 38 in2 (24516 mm2) require fur- nace input ratings greater than the input ratings of these furnaces. See footnote at bottom of Table 9, and

5.The authority having jurisdiction approves.

If all of these conditions cannot be met, an alternative venting design shall be used, such as the listed chimney adapter kit with these furnaces, which are listed for use with the kit, a listed chimney-lining system, or a Type-B common vent.

Inspections before the sale and at the time of installation will determine the acceptability of the chimney or the need for repair and/or (re)lining. Refer to the Fig. 27 to perform a chimney inspection. If the inspection of a previously used tile-lined chimney:

a.Shows signs of vent gas condensation, the chimney should be relined in accordance with local codes and the authority having jurisdiction. The chimney should be relined with a listed metal liner, Type-B vent, or a listed chimney adapter kit shall be used to reduce con- densation. If a condensate drain is required by local code, refer to the NFPA 54 / ANSI Z223.1-2009, Sec- tion 12.10 for additional information on condensate drains.

b.Indicates the chimney exceeds the maximum permiss- ible size in the tables, the chimney should be rebuilt or relined to conform to the requirements of the equip- ment being installed and the authority having jurisdic- tion.

A chimney without a clay tile liner, which is otherwise in good condition, shall be rebuilt to conform to ANSI/NFPA 211 or be lined with a UL listed metal liner or UL listed Type-B vent. Relining with a listed metal liner or Type-B vent is considered to be a vent-in-a-chase.

If a metal liner or Type-B vent is used to line a chimney, no other appliance shall be vented into the annular space between the chimney and the metal liner.

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