21
Use wood shims instead.
You will find these small wood
shims supplied with the Burntech® Fireplace
and
you can nudge them in between openings to achieve the
precision you need in making component adjustments.
Once you have removed any shims, you will want to
cover any gaps that may have resulted with the mortar.
TFS/OFS
-33/39/44/49
Fireplace Assembly
Assembly Instructions
Place the Burntech® 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.
a)
Combustible Floor Installations (TFS Models Only):
Mix up a batch of mortar and adhere hearth slabs to the
cement board (see Figure 25). All-thread rods should stick
up through the holes on the hearth slabs.
b)
Concrete Floor Installations:
Draw an outline of the
hearth area based on the dimensions shown in pages
8 and 9. Position Hearth slabs and mark rebar center
locations. Drill 4 inches into concrete slab and secure the
8 pieces of 12 inch rebar with epoxy.
Mix a batch of mortar and prepare Right Side Hearth
bottom surface to be bonded as shown in Figure 27.
Align Right Side Hearth to the outline created. The overall
width should allow for an approximate gap of 1/8” between
slabs for the additional mortar to unite the remaining slab.
Check for surface flatness, level if necessary.
Apply mortar to the remaining Hearth except this time apply
beading on surface to be facing floor as shown in Fig.28.
1.
2.
3.
4.
5.
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). Prepare side
wall and rear wall mating surfaces with the prepared mortar
and begin assembly.
Keep the assembly of the next sections of the firebox side
walls moving up, 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 each and every joint.
6.
7.
Figure 27
1/2” AWAY FROM EDGES
1/2” MORTAR
BEAD TYPICAL
Hearth section shown prepared
for Right Side position
APPLY MORTAR
BEAD TO ALL MATING
SURFACES
Figure 28
Hearth shown prepared
for Left Side position
Figure 29
Side Wall shown prepared for Right
Side Air Access.
For Left Side, bead opposite side.
1/2” AWAY
FROM EDGES
Figure 30
Combustion Air Access
Right or Left (Right shown).
Apply
mortar
Apply mortar
Side Wall
Rear Wall
Side Wall
Figure 26
Two 26 ga. galv.
hearth ember
shields required
(not supplied)
Left Side Hearth 2nd
Right Side Hearth 1st
Model
W
TFS/OFS-33 37”
TFS/OFS-39 43”
TFS/OFS-44 48”
TFS/OFS-49 53”
W
28”
Apply mortar
between joints
12 inch rebar
For TFS/OFS-33 installation continue to next page, for TFS/OFS-39/44/49 installation turn to page 23.
Summary of Contents for OFS-33
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