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

COLLAR
FLASHING
Figure 25
UNIVERSAL SUPPORT
(AC10SU)
Figure 26
Roof Down Slope Hole Size
Degree Of ACBI
Slope 7"
0 * 15"
(380mm)
2/12 15-5/8"
(390mm)
4/12 16-1/8"
(410mm)
6/12 15"
(380mm)
8/12 18-1/4"
(465mm)
10/12 19-5/8"
(499mm)
12/12 21-3/8"
(545mm)
Table 2
18

OFFSET CHIMNEY INSTALLATION

CHIMNEY
For the minimum chimney height when using
elbows, see Table 3 and refer to Figure 27.
Note: Use of ACBI chimney with these fireplaces
require the use of a starter section used at the
fireplace top collar. Use H3806 (ACBI7SB30)
offset starter for offset installations.
Minimum Chimney Height
Vertical installation 12 feet (3.66 m)
Two (2) elbows
Four (4) elbows
Table 3
After reaching the location requiring the elbow,
proceed as follows:
1. Install the first elbow. Turn it in the required
direction. ACBI: To lock it in place, turn 1/8
of a turn. Fasten the straps attached to the
elbow to the surrounding frame, using nails or
drywall screws. ASHT+ and S2100+: Fasten it to
the chimney with three (3) 1/2" metal screws,
provided with the elbow.
ASHT+ S2100+
7" 7"
13-3/8" 15-1/8"
(340mm) (384mm)
13-5/8" 15-3/8"
(345mm) (390mm)
14-1/8" 16"
(359mm) (406mm)
15" 17"
(380mm) (432mm)
16-1/8" 18-1/4"
(410mm) (465mm)
17-1/2" 19-3/4"
(445mm) (502mm)
19" 21-3/8"
(483mm) (545mm)
*C s H s
ross lope ole ize
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
When Using Elbows
15 feet (4.57 m)
17 feet (5.18 m)
Chimney ACBI
Support
Straps
Figure 27
2. Install the necessary chimney lengths to
achieve the required offset. Lock the chimney
length together. It is recommended to use three
(3) metal screws. If penetrating a wall, use a
wall radiation shield.
3. Use another elbow to turn the chimney verti-
cally. ACBI: Lock it to the chimney. Fasten the
straps attached to the elbow to the surrounding
framing using nails or drywall screws. ASHT+
and S2100+: Fasten it to the chimney with
three (3) 1/2" metal screws, provided with the
elbows.
4. Use a plumb-bob to line up the center of the
hole. Cut a hole for the chimney in the ceiling.
Frame this hole as described previously.
5. From below, install a firestop (refer to Figure
27). ASHT+ and S2100+: A support must be
used after the offset.
6. Continue with the regular installation.
Straps
Starter
Section
Note: This illustration is not to
scale. It represents how the
chimney must be supported.
A 30 degree offset only is
allowed in the USA and a 45
degree maximum offset is
allowed in Canada.
ACBI7RS