Selkirk SUPERVENT Directives D'installation Et Guide D'entretien page 7

5. Remove insulation from the inlet (female) end of the Adjustable
Length until the insulation is level with the line marked on the outside
of the pipe (See Fig. 7).
6. While still positioned with the coupler end down, insert the
standard straight length into the Adjustable Length (See Fig. 8a).
7. Re-orient the assembly to the upright position (Male Coupler Up)
and apply pressure to compress the adjoining segments together
until the overlapped edge of the Adjustable Length extends down to
the reference line marked on the standard length. Secure by installing
3 #8 x 1/2" stainless steel sheet metal screws through the pilot holes
in the Adjustable Length and into the outer wall of the adjoining
segment (See Fig. 8b).
8. Seal the overlap seam and screws with silicone sealant (See Fig. 8b).
9. Once the female end of the Adjustable Length is secured to the
adjoining segment, the assembly may be installed in the system.
NOTE: If the Adjustable Length (AL) is installed in a system where
it will be subjected to the weight of more than 4' of chimney (either
above or below), supplementary support such as Roof Support (RS)
is required.
10. Continue installing the remaining system parts.
Male End
Standard
Length
Remove Insulation
DIM "A" Down to This Line
(Non Standard Length)
Standard
Length
Fig. 6
Reference
Line
Standard
Length
Adjustable
Length
DIM "A"
+ 2.25"
Fig. 8a
Insert Standard Length While Oriented
as Shown to Avoid Insulation Spillage
Mark an Overlap Reference
Line on the Standard
Length. (The Overlap Dis-
tance is Dim "B" Plus 1")
Standard
Length
Adjustable
DIM "A"
Length
+ 2.25"
Fig. 7
Install Sheet Metal
Screws Through
Pilot Holes and
Adjustable
Into Outer Wall of
Length
Standard Length
Ensure Adjustable
Length Edge is
Standard
Even With Refer-
ence Line Length
Seal Overlap Seam and
Screws With Silicone
Sealant
Fig. 8b
Adjustable Length Attached
to Standard Length
FIRESTOPPING
Firestopping is required at every joist level. Wherever a chimney
passes through a ceiling or floor, through a wall, or into an enclosure,
it must be firestopped. No firestopping is required in conjuction with
a Ceiling Support installed as shown in Figure 13, the Ceiling Support
provides the firestopping. Firestopping performs the following
essential functions for both the dwelling and the chimney.
- Together with a fully framed opening (all four sides), controls vertical
and horizontal spread of any fire external to the chimney.
- It stabilizes the chimney in the framed opening and defines and
maintains the required AIR SPACE clearance to combustibles.
- It prevents heat losses from the dwelling by blocking vertical air
circulation in the space around the chimney.
- It helps provide stability for chimney extending above the roof.
- At the level where the chimney penetrates the air/vapour barrier,
special attention is required. Seal the vapour barrier to the Support
Assembly, Attic Insulation Shield or Wall Thimble by using an
appropriate caulking compound as per the requirement of local
authorities.
ATTIC INSULATION SHIELD (AIS)
An Attic Insulation Shield (AIS) must be installed where the chimney
enters an attic space (Figures 9 & 10). An Attic Insulation Shield is to
keep insulation from coming into contact with the chimney and will
allow a depth of insulation of 10 inches plus the depth of the ceiling
joist. If insulation is blown in and adheres to the chimney pipe, it must
be brushed off to eliminate any possible contact of this material with
the chimney surface. The height of the Attic Insulation Shield is to meet
the insulation level requirement of the National Building Code. Where
height restrictions will not permit the use of the Attic Insulation Shield,
it is permissible to construction an enclosure with the required air space
clearance to the outer pipe all the way to the underside of the roof deck.
Overlap
When enclosing the chimney below the roof line, a Rafter Radiation
Shield (RRS) must be installed at the roof level and a Firestop Radiation
Shield (FRS) at the ceiling level.
DIM "B"
For proper installation, the attic opening must be fully framed at 2 inches
of clearance to the chimney pipe with framing material of the same stock
as the ceiling joists and as per Framing Dimension Table 2 and Figure
11. The tabs on the plate of the AIS are inserted in the framed opening
around thechimney. Nail the AIS base to the framing with at least 2 per
side, using 2d (1") spiral nails or 1" x #8 wood screws.
NOTE: To reduce cold air infiltration into the dwelling you can
install the optional Universal Shielding Insulation (JUSI) into the
Attic Insulation Shield. See separate installation instructions.
FIGURE 9
7
Integrated
Storm Collar
Attic Insulation
Shield (AIS)
Telescoping
Joist Shield Chimney
Pipe