Lennox Hearth CAMBRIA 850 - Manual (Page 22)

RSMI30, RSMI45, AC10RSMI30
Chimney (10” dia.) Angle Hole Dimension
Secure Temp ASHT+
Nova Temp HT6103+
30º
17-9/16” x 45-
3/4” (446 mm x
1162 mm)
Secure Temp ASHT+
Nova Temp HT6103+
45º
Canada
only
17-1/2” x 30”
(444 mm x 762
mm)
AC 30º
17” x 42-1/2”
(432 mm x
1080 mm)
Table 5
Figure 37
Drywall
Insulated Wall
Insulated Wall
Radiation Shield
CHIMNEY MAXIMUM HEIGHT OF
SUPPORTED CHIMNEY
10” diameter Offset Support Roof Support
Secure Temp ASHT+
Nova Temp HT6103+
14 Feet
(4.3 meters)
20 Feet
(6.1 meters)
AC
30 Feet
(9.15 meters)
40 Feet
(12.16 meters)
Table 6
Figure 38
18” (460 mm)
16” (410 mm)
18” (460 mm)
18” (460 mm)
16” (410 mm)
ANGLED WALL RADIATION SHIELD
(RSMI30, RSMI45, AC10RSMI30)
When traversing a combustible wall with the
chimney at a 30º or 45º angle, an angled firestop
or wall radiation shield must be installed. Only
one is required.
Note: 45º angle for Canada only
In cold climate locations, we recommend that
you use the insulated wall radiation shield since
it will maintain the home’s thermal barrier.
4.5 CHIMNEY SUPPORT INSTALLATION
Universal Roof Support
This support has three possible uses:
1. For Secure Temp ASHT+ / Nova Temp HT6103+ ,
it must be used on a roof to support the
chimney.
2. It may be used on a floor, ceiling or roof above
an offset to support the chimney above the
offset.
3. It may be used on a floor, ceiling or roof as
a supplementary support when the chimney
height exceeds 12 feet (3.7 m).
Table 6 gives maximum height of supported
chimney.
NOTE: For the AC chimney, a support section
(AC10SL) must be used every 20 feet (6 m)
or an universal support every 15 feet (4.5 m)
instead of the universal roof support (ST).
For roof support installation, refer to the instruc-
tions provided with the support.
UNIVERSAL OFFSET SUPPORT
This support is used to support the chimney
above an offset. When the chimney offset is used
to traverse a wall this support may be used on
the wall to support the chimney. The maximum
heights are given in Table 6. For offset support
installation, refer to the instructions provided
with the support.
CHIMNEY CHASE AND MULTIPLE TERMI-
NATIONS
For the purpose of this manual, a chimney chase
is considered a part of the chimney system
rather than part of a building. The termination
must be placed a minimum of 18” (460 mm)
above the chase.
For installations where more than one chimney
is located in the same chase or within the same
area, we suggest that their terminations be
separated by at least 16” (410 mm) horizontally,
and 18” (460 mm) vertically. This separation is
to prevent smoke migrating from one chimney
to another (see Figure 38).
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
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