23
MFP-63 Assembly Instructions:
21. Place the Mason-Lite Fireplace hearth base on top of your
non-combustible floor or metal base. For concrete slabs,
supporting floor needs to be rated at ASTM 90.
22. a)
Combustible Floor Installations:
Mix a batch
of mortar and adhere hearth slabs to the cement
board (see Figure 24, Pg.18). All-thread rods should
stick up through the holes on the hearth slabs.
b)
Non-combustible Floor Installations:
Draw an
outline footprint 67” x 28” for the MFP-63 footprint and
mark the centers for the rebar locations using the hearth
slabs as templates. Drill holes for rebar 4 inches into the
concrete slab and secure the 10 pieces of 12” long rebar
with epoxy.
23. Mix a batch of mortar and prepare bottom surface of Right
Side Hearth to be bonded (
Figure 41
), then lower the
piece into place on the outline created before. Align lower
Right Side Hearth on the outline created. The 67” width
dimension allows for an approximate gap of 1/8” between
slabs for the additional mortar to unite the remaining
slabs. Continue process for remaining hearth sections
while moistening and adding mortar between joints at slab
ends.
24. Apply mortar in like manner to the Center Hearth and
place next to the Right Side Hearth. Check that surface is
LEVEL and use shims if necessary.
25. Apply mortar to the remaining Hearth except this time
apply beading on surface to be facing floor as shown in
Figure 42
.
26.
Before installing side walls, confirm placement of outside
combustion air access (if required), this can be installed
either side depending on which side is accessible to
outside combustion air (all diagrams in this manual show
the combustion air inlet hole on the right side).
27. Prepare side wall mating surfaces with the prepared
mortar as shown in
Figure 43
.
28.
Keep the assembly of the next sections of the firebox
side walls moving up (
Figure 44
), keeping components
moist, mixing mortar as you need it and threading the
mortar appropriately as you stack each section, one onto
the next. Constantly check for squareness and levelness
while building each course of block. As you complete each
section, make certain that you adhere the mortar at every
joint.
MFP-63 Fireplace Assembly
Figure 42
MFP63-1 Hearth
(shown prepared for
Left Side position)
Figure 40
Center Hearth 2nd
MFP63-1A
Left Side Hearth 3rd
MFP63-1
Right Side
Hearth 1st
MFP63-1
Apply mortar
between joints
28”
67”
Figure 44
Combustion Air Access
Right or Left (Right shown).
Apply
mortar
Apply mortar
Begin with the smallest
rear wall to the right
side as shown below.
Figure 41
1/2” away from edges
MFP63-1 Hearth
shown prepared for
Right Side position
Typical 1/2”
mortar bead
Apply mortar bead to
all mating surfaces.
Figure 43
1/2” AWAY FROM EDGES
Side Wall shown prepared
for Right Side Air Access.
For Left Side, bead
opposite side.
