Installation guide

25
joint. Rear walls are staggered on every row as shown in
Figures 45 and 46.
After the third row of rebox is complete, install Downdraft
Diverter sections (TFS63-4) as shown in Figure 47.
After the last side walls are installed, place #3 rebar (10
each, 36 inch long) vertically through the cells, into the
holes in the hearth, adjacent to the rebar and/or all-thread
sticking up from the hearth and ll all cells with Ready-Mix
concrete mix.
Set the Lintel and Lower Rear Dome in place as shown in
Figure 48. Check that all is level. If you need to make
adjustments, use shims between the lowest wall
component and the top surface of the base plate. Once
leveled, ll any resulting gaps with mortar.
Important: Adjustments can only be made while the
mortar is still wet when correcting for squareness and
leveling.
Figure 48
TFS/OFS 63-6
Lintel
TFS/OFS 63-5
Lower Rear
Dome
Fill all cells with
mortar mix.
Assemble Dome Sides (TFS/OFS 63-7) as shown in
Figure 49. The beveled face lines up with the inward
angles of the lintel sides. Top surfaces should be level.
Figure 49
Rating Plate
TFS/OFS
63-7
Dome Side
Position Middle Domes (TFS/OFS 63-10) so that outer
faces are ush to the lower dome as shown in Figure 50.
22.
23.
31.
32.
33.
34.
Figure 46
Rear Wall (long)
Rear Wall
(short)
Stagger positions of rear wall
Figure 45
Rear Wall (long)
Rear Wall
(short)
Apply
mortar
TFS/OFS-63 Fireplace Assembly
Figure 47
Downdraft
Diverter (short)
Downdraft
Diverter (long)