Connecting To Masonry Chimney; Thimbles; Chimney Connector Systems, Thimbles & Clearances From Combustible Walls - Stanley Errigal Installation And Operating Instructions Manual

CONNECTING TO MASONRY CHIMNEY

The connector to a masonry chimney must extend
through the wall to the inner face or liner but not
beyond, and must be firmly cemented to masonry.
The connector may pass through walls or partitions
constructed of combustible material to a masonry
chimney provided the connector system selected is
installed in accordance with the proper clearances
and conditions.

THIMBLES

Thimbles for chimneys or vent connectors should be
of fire clay (ASTM C 315, specifications for Clay
Flue Linings), galvanised steel of minimum
thickness of 24 gauge, or material of equivalent
durability. Thimbles should be installed without
damage to the liner. The thimble should extend
through the wall to, but not beyond, the inner face of
the liner and should be firmly cemented to masonry.
Thimbles should be located to provide adequate
pitch or rise of chimney or vent connectors and,
where the ceiling above the appliance is constructed
of combustible material, the location of the thimble
should provide minimum clearance required for the
connector as specified in section under Minimum
Clearances to Combustibles.
Insulation material used as part of wall pass-through
system should be of non-combustible material and
should have a thermal conductivity of 1.0 Btu. in./ft.F
(4.88kg.cal/hr.m.c) or less. All clearances and thick-
nesses are minimums; larger clearances and thick-
nesses are acceptable. Any material used to close
up the opening for the connector should be of non-
combustible material. A connector to a masonry
c h i m n e y, except for System 2 (under heading
Chimney Connector System,
Clearances), shall extend to piece through the wall
pass-through system and the chimney wall to the
inner face of the flue liner, but not beyond.
Fig.10
Thimbles and
6
CHIMNEY CONNECTOR SYSTEMS, THIMBLES
AND CLEARANCES
WALLS
1. Minimum 3 1/2" (90mm) thick brick masonry
wall framed into combustible wall with a min.
of 12" (305mm) brick separation from clay
liner to combustibles. Fire clay liner (ASTM
C315 or equivalent) min. 5/8" (16mm) wall
thickness, should run from outer surface of
brick wall to, but not beyond, the inner sur-
face of chimney flue liner and should be
firmly cemented in place.
of brick
2. Solid insulated listed factory-built chimney
length of the same inside diameter as the
chimney connector and having 1" (25mm) or
more of insulation with a min. 9" (230mm) air
space between the outer wall of the chimney
length and combustibles. The inner end of
the chimney length shall be flush with the
inside of the masonry chimney flue and
shall be sealed to the flue and to the brick
masonry penetration with non water-soluble
refractory cement. Supports should be
securely fastened to wall surfaces on all
sides. Fasteners between supports and the
chimney length shall not penetrate the
chimney liner.
(230mm)
Fig.11
minimum
FROM COMBUSTIBLE
(50mm)
(305mm)
(305mm) to
(50mm)
(230mm)