Isokern Standard 36 - Specialty Applications; See-Thru Applications

Specialty Applications - See-Thru
44
A
B
STEEL ANGLE
4 x 4 x 3/8 MIN
VERTICAL SIDE
FACE INSIDE FIREBOX
(BOTH SIDES)
NOTCH FOR STEEL
ANGLE PLACEMENT
(BOTH SIDES)
FRONT
VIEW
STEEL
ANGLE
MODEL A B
28 35 1/2” 45 1/2“
36 43” 53”
42 49” 59”
46/48 53” 63”
1 1/2”
MIN *
1 1/2”
MIN *
HEARTH
EXTENSION
MINIMUMS
VERTICAL
FACE IN
1 1/2”
OVERHANG
The See-Thru application of the replace is built with
a replace kit, omitting the back walls. To support the smoke
dome and chimney, steel angle is required to be installed as
described. Note that due to the large opening area of a two-
sided replace this type of replace can be difcult to get to
reach and to maintain proper drafting.
Constructing a See -Thru Unit:
1) Set the base plate in place.
Notes: If the design preference is for a “ush hearth” (replace
oor ush with the room’s oor), the base plate can be omitted
from the assembly and the rebox walls built directly on the
concrete support slab as long as there are no combustible
underpinnings underneath the concrete slab.
Whether a ush hearth is preferred or a raised hearth,
the combustible oor on front of the replace must be covered
with a noncombustible hearth extension set tight against both
open sides of the replace and extending at least 20 inches out
from the replace opening and at least 12 inches beyond the
nished sides of the replace opening.
2) The rebox back wall components are not used. The
rebox side walls are set, reversed from their normal position,
their ared faces set to the outside of the rebox. (Figure 74)
The rebox side walls must sit a full 3” on the front &
rear of the base plate. Since the side wall components air from
3” at the narrow front end to 8” on the wide rear end, the side
walls will overhang the base plate by approximately 5” at the
rear of the unit. (Figure 76)
3) Once the side wall assembly is complete it is
necessary to place a steel angle minimum 4”x 4”x 3/8” across
each face of the two sided opening before building the smoke
dome assembly. Notch the ends of each sidewall equal to the
thickness of the steel as shown. Each end of the steel angles
must bear fully at least 3” onto the side wall assembly. (Figure
74)
4) Since there is no back wall assembly and no side
wall ledge for placement of a cast iron throat damper, the smoke
dome for the See-Thru replace is built by placing one long
damper beam on top of the rebox back wall and ush with
it; the other long damper beam sits ush with the front of the
Isokern Standard rebox, spanning the rebox opening.
These components both sit on their narrow base so that
their beveled face points down and into the rebox interior.
5) The damper plate end pieces are designed to sit on
the rebox side wall between the front and back long damper
beams. Place the vertical face of each piece 1-1/2” to the inside
of the inside sidewall of the rebox. This will allow the re
brick to align ush with the damper end pieces. (Figure 75)
6) Once the smoke dome assembly is built and the DM
chimney is installed, a chimney top damper is set at the top of
the ue or a bottom mount damper is installed to the inside of
the top plate.
FIGURE 74
FIGURE 76
FIGURE 75