Chimney System - Lennox Hearth Products Villa Vista Installation & Operation Manual

CHIMNEY SYSTEM

CHIMNEY INSTALLATION NOTES
1. If possible, 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 in-
creases the likelihood of operating problems
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 out-
side chimney, are especially prone to flow
reversal.
2. The Lennox fireplace model VILLA VISTA™
fireplace is listed only with Security
Chimneys International Ltd. 7" diameter
chimney systems models ACBI or ASHT+
or S2100+.
Note: Use of ACBI chimney with these fire-
places require the use of a starter section
used at the fireplace top collar. Use H3805
(ACBI7SBA) or H3806 (ACBI7SB30).
3. A chimney venting a fireplace shall not vent
any other appliance.
4. The minimum chimney height is 12 feet
(3.7 m). In altitude, add 18" (450 mm) to
the chimney for every 2000 feet (600 m)
above sea level.
5. All chimney installations must include at
least one support. The maximum chimney
length that can be supported by the fireplace
is 20 feet (8m) for ACBI chimney and 12 feet
(3.7 m) for ASHT+ chimney.
6. The chimney must extend at least 3 feet (915
mm) above its point of contact with the roof
and at least 2 feet (610 mm) higher than any
wall, roof or building within 10 feet (3m) of
it (see Figure 21).
7. If the chimney extends higher than 5 feet
(1500 mm) above its point of contact with
the roof, it must be secured using a brace
and guy wires.
8. A rain cap must be installed on top of the
chimney. Failure to install a rain cap may
cause corrosion problems.
9. Portions of the chimney which may extend
through accessible spaces must be enclosed
to avoid contact with combustible materials
or damage to the chimney.
16
10'
Figure 21
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
2' min.
3' min.