DELTA FUSION Owner's Manual
21
RSF Woodburning Fireplaces
To make the hole through the masonry chimney and make the connection to the fireplace, we recommend that you
follow these steps:
1. Sight-in and mark the outline of where the EXCEL chimney will penetrate the masonry chimney.
2. Using a large (¾" - 2") masonry drill bit, drill a hole exactly in the center of the oval outline. With a masonry
hammer and drill, slowly enlarge the hole to the size required. Remember to work from the center out. Be
especially careful with the clay liner behind the brick because three sides of it must stay in place.
3. Bring the stainless steel liner down from the top of the chimney.
If you are using a rigid liner you will need enough room to secure an elbow to it with at least two screws.
If it is difficult to install rigid stainless steel liner in the existing masonry chimney or for a masonry chimney with
less than 10"x10" inside, a listed stainless steel flexible liner can be used along with a flexible/rigid adaptor (LM-
8LAF) available from your RSF dealer.
4. Install the liner elbow and masonry adaptor on the lower end of the liner.
5. Move the fireplace forward enough to install the EXCEL chimney on the fireplace (elbow and length) then move
the fireplace back into position as you connect the masonry adaptor to the EXCEL chimney.
Using a New Masonry chimney
Since the masonry chimney is not build yet, we recommend that you position your fireplace, install the EXCEL
chimney on it and connect to the first length of liner before building the chimney as explained above and shown in
Figure 12 . The liner sections can easily be installed as the layers of brick are being placed. Since this is a new
chimney, we recommend that you build it to the right size so you do not have to ovalize the liner but if you choose
to use a 6"x10" clay liner you will need to ovalize the stainless steel liner to fit into the clay liner.
REMEMBER:
The stainless steel liner should be fitted inside the clay liner all the way to the top of the masonry
chimney. It is not meant to replace the clay liner.
FINISHING AROUND THE FIREPLACE
Finishing materials that cover the facing of the fireplace MUST BE NON-COMBUSTIBLE (e.g. brick, slate, ceramic
tile, etc.). Drywall cannot get closer to the fireplace than the side standoffs and the top clearance specified in Table
1 (L) and shown in Figure 4.
❖
WARNING: MAKE SURE TO RESPECT THE TOP CLEARANCE SPECIFIED IN TABLE 1 (L).
HEARTH EXTENSION
The area immediately in front of the fireplace must be protected by a non-combustible material such as brick, tile,
stone, or slate. Refer to Table 1 (G-H) for the depth and width the hearth protection should extend beyond the front
and both sides of the door opening (see Figure 1). There is no minimum thickness required for the hearth extension.
BENEATH HEARTH EXTENSION
If the DELTA FUSION is installed on a non-
combustible floor, the spark guard specified below is
not required.
Install the spark guard provided (5" x 36" piece of
sheet metal) halfway under the fireplace and halfway
under the hearth extension and centered on the door
opening. The spark guard will extend 2½" beneath the
fireplace. This will make certain that sparks cannot
lodge in this area and start a fire. If necessary, the
provided spark guard can be cut to the minimum
width specified in Table 1 (I).
If you are preparing a raised installation, you will need a custom made spark guard, either a "Z" shaped spark guard
or a right angle spark guard (see Figure 13). The Z-shaped spark guard must be used if the height between the
bottom of the fireplace and the top of the non-combustible flooring of the hearth extension is less than or equal to
2 ½". The height of the Z-shaped spark guard must equal the distance between the floor and the base of the unit
and go under the hearth extension and the fireplace by at least 2½". If the unit is installed higher than 2 ½" from the
Figure 13 Special Custom-made Spark Guard
Non-
Combustible
Flooring
Right Angle
Spark Guard
(not provided)
More than 2 1/2"
Non-
Combustible
Flooring
Z-Shaped Spark
Guard (not
provided)
2 1/2" or less
RSF
Fireplace
