Harman Stove Company TLC 2000 Stove manual Existing Masonry Chimneys, Venting to a Masonry Chimney

TLC 2000 Coal Stove 17

Codes require that solid-fuel chimneys extend 3 ft

(0.9 m) above the point at which they exit from the roof, provided that no part of any structure is within the top of the chimney, then the chimney must extend 2 ft (6 m) above the highest point with the 10 ft (3 m) radius top height. If there is not ten feet of clearance from the top of the chimney, then the chimney must extend 2 ft (6m) above the highest point with the 10 ft (3m) radius.

Do not connect this unit to a chimney flue servicing another appliance.

NOTE: The restriction of not venting more than one appliance to the same flue applies to the U.S. specifi- cally. While it is not recommended that you use the same chimney for more than one appliance, in Canada certain exceptions may be made. Be sure to contact your build- ing code inspection official to see if this option is allowed in your area, and to find out the specific requirements for such an installation.

Existing Masonry Chimneys

If you plan on using a pre-existing masonry chim- ney, have it thoroughly inspected and cleaned. Any faults which make the chimney unsafe and unusable must be repaired prior to use. These can include improper height, structural defects, blockages, inadequate clearance to com- bustibles, unsealed openings into other rooms of the house, signs of creosote or smoke leakage, a loose or absent clean- out door, or absence of a liner.

Do not connect to any air distribution duct or system

Venting to a Masonry Chimney

When connecting to a masonry chimney, several provisions are standard. First, whether the chimney con- nector is vented to the chimney through a thimble or a breech pipe, neither must pass beyond the inner surface of the chimney liner, and both must be firmly cemented in place with refractory cement. (A thimble is a masonry pipe which is inserted through the chimney wall, and is frequently the preferred method; a breech pipe is a piece of steel pipe used the same way.) In Canada, a breech pipe has ridges or protrusions to lock it firmly into the refractory cement. In either case, the chimney connector vents to the chimney through the thimble or breech pipe.

Using a thimble, the connector slides completely inside the masonry to the inner edge of the flue liner, and may be easily removed for chimney and connector in- spection. A breech pipe must extend at least 2" (50 mm) into the room, so the connector can be attached with sheetmetal screws.

Venting to a Masonry Fireplace Chimney

In some situations, a code compliant chimney originally used for a masonry fireplace may be used to install your TLC 2000. In addition to the requirements found in the previous paragraphs, it is important to be

aware that all clearances must be met, including those from the chimney connector to combustibles — 18" (360

mm)to sides and 18" (450 mm) to ceiling. Do not forget to include floor protection in your plans. (See Clearances and Floor Protection in this section.) Since many fire- places have exposed wooden mantels and trim, pay spe- cial attention to the clearances necessary to these materi- als.

If your fireplace chimney is behind a combustible wall, you must use an approved wall pass-through sys- tem to gain access to the masonry chimney. The chim- ney connector must enter the chimney at a place where it is lined, and the fireplace must be made inoperable. For example, you might remove the damper, replacing it with a secure, airtight, noncombustible seal (removable for in- spection); this also satisfies the requirement that no room air must be allowed to enter the chimney.