Vermont Casting 1635 - Manual (Page 7)

7
Vermont Castings Seville
30001490
Connection Above the Fireplace
In this installation, the chimney connector enters the
fireplace flue though a thimble located above the
fireplace. (Fig. 6) The liner of the fireplace chimney
should extend at least to the point at which the chim-
ney 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:
• The stove and chimney connector clearances to
combustible mantel and trim materials are the same
as clearances to combustible walls. If necessary,
use a combination of mantel, trim, and connector
heat shields to provide the required clearances.
Refer to Page 12.
• Double-check connector clearance to the ceiling.
• The fireplace damper must be closed and sealed to
prevent room air from being drawn up the flue which
could reduce performance. However, it must be
possible to reopen the damper to inspect or clean
the chimney.
• Floor protection requirements also apply to fireplace
installations.
Wall Pass-throughs
Whenever possible, design the installation so that the
connector does not pass through a combustible wall. If
you must include a wall pass-through in your installa-
tion, check with your building inspector before you
begin. Also check with the chimney connector manu-
facturer for any specific requirements.
Consult with your dealer regarding special connection
components available for use as wall pass-throughs.
Use only parts that have been tested and listed for use
as a wall pass-through.
U.S. Requirements: The National Fire Protection
Association (NFPA) has established guidelines for use
in the United States for passing chimney connectors
through combustible walls. Many building code
inspectors follow these guidelines.
Figure 7 shows one NFPA-approved method. All
combustible material in the wall is cut away to provide
12" (305mm) clearance to the connector. Brick and
mortar are used to enclose the clearance area.
Alternate methods approved by the NFPA:
• Using a section of double-wall chimney with a 9"
(229mm) clearance to combustibles. (Fig. 8)
• Placing a chimney connector pipe inside a steel
double-wall ventilated thimble, which is then sepa-
rated from combustibles by 6" (152mm) of fiber-
glass insulating material. (Fig. 9)
Min. 2" (51mm) Chimney
clearance to brick and
combustibles
A = Minimum 12" (305 mm) brick
construction between liner and
combustible framing materials
Min. 12"
(305 mm)
Fire clay
liner
A
A
Chimney Flue
Fire clay liner
Masonry
Chimney
constructed
to NFPA
211
Fig. 7 Masonry Wall Pass-through with single wall
chimney connector.
Chimney
connector
ST272
Fig. 8 Wall Pass-through using factory-built insulated
chimney section.
Min. 9"
(229mm)
Air Space
Min. 9"
229mm
Chimney Flue
Sheet Steel
Supports
Min. 2"
(51mm)
Non-soluble
refractory cement
Solid
insulated,
listed factory-
built chimney
length set flush
with flue
Chimney
Connector Masonry
Chimney
constructed to
NFPA 211
24 ga.Sheet
Steel
Supports
ST273
Fig. 6 If the clearance between the chimney connector and
either the ceiling or the mantel is inadequate, a protective
heat shield is required.
Note clearance
requirement on
Pages 12-13
Mantel
Chimney Connector
Heat Shield
ST244
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