Astria.us.com
125160-01_D
25
FIREPLACE INSTALLATION
Continued
Install Smoke Shelf MFP33-4
after 2nd row of walls.
Add rebar and fill all cells
with concrete mix
Install rebar adjacent
to all-thread or rebar
stemming from floor.
These
surfaces
should be
flush
Lower Rear
Dome MFP33-5
Lower
Dome Sides
MFP33-7
T-Bar
Lintel
Front
NOTE: For MM33 installation continue from steps 8 thru 13, for
MM-39/44/49 installation follow steps 14 thru 20.
Combustion Air Access Right
or Left (Right shown).
Apply
mortar
Apply mortar
Side Wall
Rear Wall
Side Wall
Figure 38 - Layering walls and sides for MM33, 39, 44, 49
Figure 40 - Assembling Lower Dome Sides for (MM33 only)
Figure 39 - Installing Smoke Shelf MMFP33-4 (MM33 only)
8. MM-33 ONLY:
After the second row of firebox is complete,
install Smoke Shelf and remaining side walls (Figure 39).
Mix approx. 2 cu. ft. of Ready-Mix Concrete. Insert 28” rebar
vertically through the cells, into the holes in the hearth, adjacent
to the rebar and/or all-thread sticking up from the hearth. Fill all
cells with Ready-Mix Concrete mix.
9. Set the Lintel and Lower Rear Dome in place as shown in Figure
40. Check that all is level. If you need to make adjustments, use
shims. Place one or more of these shims between the lowest
wall component and the top surface of the base plate. Once
you are satisfied with the degree of levelness, you can address
any gap that may have occurred with an appropriate amount
of mortar.
Note:
Although you are cautioned to use mortar sparingly
because it does have such holding power, you should look over
the firebox assembly at the end and fill in any gaps, especially
joint connections, with the mortar.
Important:
Adjustments can only be made while the mortar is
still wet when correcting for squareness and leveling.
10. Assemble Lower Dome Sides as shown in Figure 40. The
beveled face lines up with the inward angles of the lintel sides.
Top surfaces should be level.
11. As you are connecting each component, be certain you are
following the instructions given previously for using mortar.
Stop to look at the smoke dome side, front and rear walls to
see that they are aligning correctly and that the surfaces are
smooth and uniform.
Make sure connections are covered with an adequate amount
of mortar. Remember that you have the option of using shims
but they must be removed and any holes filled. Make any
adjustments to the fireplace alignment before continuing to the
next step.
12. Assemble Upper Dome (MFP33-10) and Dome Sides (MFP33-
8) as shown in Figure 41, page 26. Check your assembly here.
If things are proceeding as they should be, the finished top
surface should be flat and level.
13. Finally, set the Dome Top into position. Be sure that it is flush
in every direction as you place it on the crest of the smoke
dome wall assembly. After this is done, proceed to section on
“Installing Damper and Chimney System” on page 31.
Note:
The chimney hole on the Dome Top is not centered from front
to back - it should be offset closest to the rear of the fireplace (see
Figure 41, page 26).
