10. Cut and frame square holes in all floors, ceilings, and roof that the
chimney will go through to provide a 2” (50 mm) clearance between
the chimney and any combustible materials. Do not fill this 2” space
with insulation or any other combustible material.
11. Portions of the chimney which may extend through accessible spaces
must be enclosed to avoid contact with combustible materials or
damage to the chimney.
12. When offsets are used, the pipe may not penetrate a ceiling or floor
unless it is running vertical (no 30° offsets).
THE CHIMNEY SYSTEM
Chimney Installation Notes
1. This appliance is equipped with a universal vent collar that will require
the first vent section of pipe to be secured with four screws to the
collar (equally spaced around circumference).
2. Always install an interior chimney as it will provide better performance.
In areas with continuous temperatures below 0° F (- 18° C), the use
of an exterior chimney increases the likelihood of operating prob-
lems such as low draft, high rate of creosoting, and poor start-up
characteristics. Exterior chimneys are also prone to down drafting
and flow reversal. Installations, which are located on lower floors
in the house, such as in a basement, in combination with outside
chimney, are especially prone to flow reversal. If interior installation
is impossible, install an AC chimney enclosed in an insulated chase.
3. The fireplace model WRT4820WS may be installed only with Security
Chimneys
®
Ltd 6” diameter chimney systems
*
or DuraVent models
DuraTech
®
and DuraTech DTC chimney systems
**
..
4. A chimney venting a fireplace shall not vent any other appliance.
5. The minimum chimney height is 12 feet (3.7 m). In altitude, add 18”
(450 mm) to the chimney for every 2,000 feet (600 m) above sea
level.
6.
All chimney installations must include at least one support.
The
maximum length of chimney that can be supported by the fireplace
is 26 feet (8 m).
7. The chimney must extend at least three (3) feet (915 mm) above its
point of contact with the roof and at least two (2) feet (610 mm)
higher than any wall, roof or building within ten (10) feet (3m) of it
(Figure 27)
.
8. If the chimney extends higher than five (5) feet (1,500 mm) above its
point of contact with the roof, it must be secured using a roof brace.
9. A rain cap must be installed on top of the chimney. Failure to install
a rain cap may cause corrosion problems.
NOTE: 2" clearance to combustibles around chimney components required.
NOTE: Blown or fill type insulation materials must not be in contact with
the fireplace or in the enclosure frame as described in ‘’Enclosure’’ section.
NOTE: Local codes may not require firestopping at the ceiling levels for
outside chase installations. However, it is recommended for safety and
the reduction of heat loss.
Figure 27
two (2) feet Min.
three (3) feet Min.
ten (10) feet
*
Available from Security Chimneys
®
**
Available from DuraVent
®
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
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