Lennox Hearth Products MONTECITO ESTATE MONTEST, Installation And Operating Instructions Manual, Page: 15 / 24

Roof Down Slope Hole Size
DEGREE OF SLOPE Secure Temp™ S2100+
Nova Temp™
Secure Temp GX
ACBI
Roof Pitch 7” 7”
0 * 15” (380 mm) 15” (380 mm)
2/12 15-3/8” (390 mm) 15-3/8” (390 mm)
4/12 16-1/8” (410 mm) 16-1/8” (410 mm)
6/12 16-7/8” (430 mm) 16-7/8” (430 mm)
8/12 18-1/4” (465 mm) 18-1/4” (465 mm)
10/12 19-5/8” (500 mm) 19-5/8” (500 mm)
12/12 21-3/8” (545 mm) 21-3/8” (545 mm)
Table 3
* Cross Slope Hole Size
After reaching the location requiring the
elbow, proceed as follows:
Secure Temp S2100+ / Nova Temp /
Secure Temp GX Chimneys
1. Install the fi rst elbow; turn it in the required
direction. Fasten it to the chimney with
the three (3) 1/2” (12 mm) metal screws
provided with the elbow.
2. Install the necessary chimney lengths to
achieve the required offset. Lock the chimney
lengths together: it is recommended to use
three (3) 1/2” (12 mm) screws. If the offset
length is made of two (2) chimney lengths
or more, use an offset support halfway up
the offset. If penetrating a wall, install a wall
radiation shield (see
Figures 29 & 30 ).
3. Use another elbow to turn the chimney
vertically. Secure the elbow, using three
(3) 1/2” (12 mm) screws (provided with the
elbow).
4. Use a plumb bob to line up the center of
the hole. Cut a hole for the chimney in the
ceiling/fl oor. Frame this hole as described
previously (refer to
Chimney Installation
Instructions on Page 14 ).
5. From below, install a fi restop (See Figure
23a ) .
6. A support (XST+ or XSO+) must be used on
the fi rst 15’ section (5 m).
7. Continue with the regular installation.
ACBI Chimney
1. Install the fi rst elbow. Turn it in the required
direction. 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
( Figure 28 ) .
2. Install the necessary chimney lengths to
achieve the required offset. Lock the chimney
lengths together. If penetrating a wall, use
a wall radiation shield.
3. Use another elbow to turn the chimney
vertically. Lock it to the chimney. Fasten
the straps attached to the elbow to the
surrounding framing using nails or drywall
screws.
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 (see Figure
23b ).
6. Continue with the regular installation.
CHIMNEY MODEL ACBI
Collar
Chimney
Flashing
Figure 25
Figure 26
Minimum Chimney Height When Using Elbows
Fireplace Model MONTEST
Chimney Model Secure Temp S-2100+ / Nova Temp / Secure Temp GX / ACBI
Vertical Installation 3.66 m (12’)
Two (2) Elbows 4.57 m (15’)
Four (4) Elbows 5.18 m (17’)
Table 4
OFFSET CHIMNEY INSTALLATION
After reaching the location requiring the elbow, proceed as follows. The minimum chimney height
when using elbows is:
Note: Must return to vertical before penetrating ceiling or fl oor.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
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