CFM Corporation 2460 Securing the Connector to a Masonry Chimney, Freestanding Installations

Securing the Connector to a Masonry Chimney

The Dutchwest Convection heaters may be connected to either a freestanding masonry chimney or a masonry fireplace chimney.

Freestanding Installations

If the chimney connector must pass through a combus- tible wall to reach the chimney, follow the recommenda- tions in the wall pass-through section that follows.

The opening through the chimney wall to the flue (the “breech”) must be lined with either a ceramic or metal cylinder, called the “thimble”, which is securely cemented in place. (Fig. 7) Most chimney breeches incorporate thimbles, but check to be sure the fit is snug and the joint between thimble and chimney wall firmly cemented.

A special piece called the “thimble sleeve,” slightly smaller in diameter than the standard connector and most thimbles, will ease the removal of the chimney connector system for inspection and cleaning. Thimble sleeves should be available from your local dealer.

To install a thimble sleeve, slide it into the breech until it is flush with the inner flue wall. Don’t extend it into the actual flue passage, as that 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.

Fireplace Installations -

Above the Fireplace

In this installation, the chimney connector rises from the stove, turns ninety degrees, and goes back into the fireplace chimney. The liner of the fireplace chimney

	Dutchwest
	Thimble
	Sleeve
	Flue
Elbow	Thimble
	Keep
	Sleeve
	End Flush
	with Flue
	Tile

Chimney

Connector

Flue Liner ST243

Fig. 7 The thimble, made of either ceramic or metal, must be cemented in place securely.

Masonry Wall

Ceramic Flue Liner

Chimney Connec- tor Shield

Block-Off Plate

Chimney Connector

ST244a

Fig. 8 The connector enters flue above the fireplace. If the clearance between the chimney connector and either the mantel and/or the ceiling is inadequate, special protective shields will be required.

should extend at least to the point at which the chimney connector enters the chimney. Follow all the guidelines for installing a chimney connector into a freestanding masonry chimney, and pay special attention to these additional points:

• Check the stove and chimney connector clearances

to combustible mantel or trim materials. Use the

necessary combination of mantel, trim, and connec-

tor heat shields to provide the required clearances.

(Fig. 8)

• Double-check connector clearance from the ceiling.

• The fireplace damper must be closed and sealed

Flue Liner

Extend Chimney Con- nector to the First Tile of the Flue Liner

Observe Miniumum Clearances

ST245a

Damper Plate is Remvoed or Locked in Open Position

Close Off the Damper Opening with Sheet Metal and Sealant

to prevent room air from being drawn up the flue,

reducing the draft. However, it must be possible to

re-open the damper to inspect or clean the chimney.

Fig. 9 The connector passes through the fireplace to enter flue. Special Fireplace Adapter Kits to simplify fireplace instal- lations are available from your local dealer.

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