NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
20
*
Available from Security Chimneys™
Figure 25
Figure 26
OFFSET CHIMNEY INSTALLATION
For the minimum chimney height when using
elbows, see
Table 3
and refer to
Figure 27
.
NOTE:
Use of ACBI
*
chimney with these
fi replaces require the use of a starter section
used at the fi replace top collar. Use H3806
*
(ACBI7SB30
*
) offset starter for offset instal-
lations.
Figure 27 - Offset Chimney Installation
*
FLASHING
COLLAR
CHIMNEY
UNIVERSAL SUPPORT
(AC10SU)
Minimum Chimney Height
When Using Elbows
Vertical installation 12 feet (3.66 m)
Two (2) elbows
15 feet (4.57 m)
Four (4) elbows
17 feet (5.18 m)
Table 3
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.
1.
Install the fi rst 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.
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
vertically. 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 fi restop (
refer to
Figure
27
)
. ASHT+
*
and S2100+
*
: A support must
be used after the offset.
6.
Continue with the regular installation.
NOTES:
•
Must return to vertical before penetrating
ceiling or fl oor.
•
A maximum of 2 offsets are allowed.
After reaching the location requiring the elbow,
proceed as follows:
Chimney ACBI
Support
Straps
Straps
ACBI7RS
Starter Section
Roof Down Slope Hole Size
SLOPE
ACBI
*
ASHT+
* /
DuraTech
DTC
**
S2100+
*
Roof
Pitch
7”
7”
7”
0 *
15"
(380mm)
13-3/8"
(340mm)
15-1/8"
(384mm)
2/12
15-5/8"
(390mm)
13-5/8"
(345mm)
15-3/8"
(390mm)
4/12
16-1/8"
(410mm)
14-1/8"
(359mm)
16"
(406mm)
6/12
15"
(380mm)
15"
(380mm)
17"
(432mm)
8/12
18-1/4"
(465mm)
16-1/8"
(410mm)
18-1/4"
(465mm)
10/12
19-5/8"
(499mm)
17-1/2"
(445mm)
19-3/4"
(502mm)
12/12
21-3/8"
(545mm)
19"
(483mm)
21-3/8"
(545mm)
* Cross Slope Hole Size
Put the chimney cap into place.
Wash the roof fl ashing with a solvent or vinegar,
then paint it with rust-proof paint.
Table 2
**
Available from DuraVent
®
