Astria.us.com
125160-01_D
29
FIREPLACE INSTALLATION
Continued
10. After the third row of firebox is complete, install Downdraft
Diverter sections (MFP63-4) as shown in Figure 54.
11. 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 fill all cells with Ready-Mix concrete mix.
12. Set the Lintel and Lower Rear Dome in place as shown in Figure
55. 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, fill any resulting gaps with mortar.
Important:
Adjustments can only be made while the mortar is
still wet when correcting for squareness and leveling.
MFP63-6
Lintel
MFP63-7
Dome Side
Rating Plate
Fill all cells with
mortar mix.
MFP63-5
Lower
Rear Dome
Figure 55 - Attaching Lower Rear Dome and Lintel (MM63)
Figure 56 - Attaching Dome Sides (MM63)
9. Rear walls are staggered on every row as shown in Figure 53.
Rear Wall (long)
Downdraft Diverter
(short)
Downdraft Diverter
(long)
Rear Wall
(short)
Rear Wall (long)
Rear Wall
(short)
Apply
mortar
Figure 53 - Staggering walls and sides for MM63
Figure 54 - Installing Downdraft for MM63
Stagger positions of rear wall
13. Assemble Dome Sides (MFP63-7) as shown in Figure 56. The
beveled face lines up with the inward angles of the lintel sides.
Top surfaces should be level.
