Lennox Hearth LBR-4324-H, LBR-3824 Installing The Chimney System, CAUTION ALLOW A MINIMUM 2 51 MM

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Step 4. The fireplace should be anchored to the floor. Bend down the four (4) anchor tabs located at the base of the fireplace and secure to the floor with 8d nails (Figure 17 ).

Anchor

Tab

Figure 17

Step 5. The fireplace should be secured to the side framing members through the nailing flange (Figure 18 ).

Nailing

Flange

Framing	8d Nail
Stud

Figure 18

Note: The nailing flange and the area directly behind the nailing flange is exempt from the clearances described on the fireplace clearance label.

For Canadian Installations, Proceed with Steps 6 through 9

Step 6. Attach the cold climate kit, Model FTF10-CCK1-LD, around the chimney collar with the screws provided (Figure 19 ).

Step 7. Connect the 4" (102 mm) Class 0 air duct provided, to the collar on the chimney collar enclosure with the screws provided in the kit’s hardware package.

Step 8. Route the Class 0 air duct out the back or side wall, up through the ceiling or floor joists to an outside wall. The duct inlet should be located above snow level or above any anticipated snow level.

Enclosure Box

Figure 19

Note: If the fireplace is installed against an inside wall, the Class 0 air duct may be ex- tended into a ventilated attic space at least 18" (457 mm) above the attic floor. Secure the duct hood to a vertical post with the inlet positioned downward. Ensure that nothing blocks the hood opening. This duct must never terminate higher than the fireplace chimney.

Step 9. Cut or frame a hole through the outside wall for the installation of the duct inlet hood. A 4-1/2" (114 mm) diameter hole is required. Feed the loose end of the flexible duct through the hole cut for the inlet hood and attach to the collar on the inlet hood using (2) two screws. Insert the hood into the opening. Secure in place with nails driven through the holes in hood flange. Seal with noncombustible water- proof silicon type caulking. If additional duct is needed, use Class 0 metallic air duct.

INSTALLING THE CHIMNEY SYSTEM

Step 1. Check the flue damper for proper op- eration. When the flue damper is in the fully closed position, the damper control lever is pushed all the way to the rear of the firebox. When the damper is in the fully open position, the flue damper control lever is pulled all the way to the front of the firebox.

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

Step 2. Using standard construction framing techniques, construct openings for the chim- ney through the ceiling(s) and roof or through an outside chase. All framing must maintain the minimum air space clearance at all times.

CAUTION: ALLOW A MINIMUM 2" (51 MM)

CHIMNEY AIR SPACE TO COMBUSTIBLE FRAM- ING MEMBERS THROUGHOUT VERTICAL AND/ OR OFFSET CHIMNEY INSTALLATIONS.

A minimum 2" (51 mm) air space must be reserved for all combustible and noncombus- tible materials extending for any continuous length surrounding the chimney.

Reference Figures 15 and 16 and charts “Fram- ing Dimensions for Ceiling and Roof,” which specify minimum ceiling and roof dimensions.

For new construction, to determine chimney cen- ter line, use plumb line from ceiling or roof above fireplace to the center of fireplace flue collar.

For remodeling, plumb to the center of the fireplace flue collar from the ceiling or roof above. Drive a nail through the ceiling or roof from below to mark position. Mark and cut a hole in the ceiling (around the nail) (Figure 20 ). Then plumb from ceiling or roof directly above the cut hole to determine roof hole position.

Figure 20

Note: The optional collar duct kit, Model FTF10- CDK, should be installed after the chimney has been attached to the flue collar.