Sierra Flame Lynwood W76, Installation And Operation Instructions Manual

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Page 15
Method C
6” (152.4 mm) Clearance to Combustible Wall Member:
Starting with a minimum 24 gage (.024” [.61 mm]) 6” (152.4 mm) metal chimney connector, and a
minimum 24 gage ventilated wall thimble which has two air channels of 1 in. (25.4 mm) each,
construct a wall pass-through. There shall be a minimum 6” (152.4) mm separation area contain-
ing fiberglass insulation, from the outer surface of the wall thimble to wall combustibles. Support
the wall thimble, and cover its opening with a 24-gage minimum sheet metal support. Maintain the
6” (152.4 mm) space. There should also be a support sized to fit and hold the metal chimney
connector. See that the supports are fastened securely to wall surfaces on all sides. Make sure
fasteners used to secure the metal chimney connector do not penetrate chimney flue liner.
Method D
2” (50.8 mm) Clearance to Combustible Wall Member:
Start with a solid-pak listed factory built chimney section at least 12” (304 mm) long, with insulation
of 1” (25.4 mm) or more, and an inside diameter of 8” (2 inches [51 mm] larger than the 6” [152.4
mm] chimney connector). Use this as a pass-through for a minimum 24-gage single wall steel
chimney connector. Keep solid-pak section concentric with and spaced 1” (25.4 mm) off the chim-
ney connector by way of sheet metal support plates at both ends of chimney section. Cover open-
ing with and support chimney section on both sides with 24 gage minimum sheet metal supports.
See that the supports are fastened securely to wall surfaces on all sides. Make sure fasteners
used to secure chimney flue liner do not penetrate the liner.
Notes
1. Connectors to a masonry chimney, excepting method B, shall extend in one
continuous section through the wall pass-through system and the chimney
wall, to but not past the inner flue liner face.
2. A chimney connector shall not pass through an attic or roof space, closet
or similar concealed space, or a floor, or ceiling.
Minimum chimne y clearance to
sheet steel supports and combustibles
2 in. (50.8 mm)
Two air channels
each 1 in. (25.4 mm)
Chimney connector
Minimum 6 in. (152.4 mm)
glass fiber insulation
Sheet steel supports
Masony chimney
C
himne
y flue
Two ventilated air channels
each 1 in. (25.4 mm).
Construction of sheet steel.
Sheet steel
supports
Chimney
connector
Chimney
section
Air space 2 in.
(50.8 mm)
Minimum chimney clearance to
sheet steel supports and combustibles
2 in. (50.8 mm)
Minimum clearance
2 in. (50.8 mm)
1 in. (25.4 mm) air
space to chimney length
Chimney connector
Sheet steel supports
Chimney length
Masony chimney