PEARL 3600 Owner's Manual
17
RSF Woodburning Fireplaces
CHASE ENCLOSURE
If the chimney runs up the outside of the house, we
recommend that it be enclosed in a chase structure. The
chase should be constructed in such a way that it is an
extension of the home (see Figure 15). It should be well
insulated between the footings and the floor of the home to
prevent heat loss. If the climate in your area is mild, insulate
the chase at least to the first firestop. If the climate in your
area is very cold, insulate the chase to the top to keep the
chimney warmer, increase the draft, and reduce creosote
buildup. We also recommend insulating the ceiling of the
chase just as if it were in the attic space. This will prevent
cold air from dropping down through the chase and into the
room where the fireplace is installed (see Figure 15).
Some local codes require that the walls be insulated, vapor
sealed and sheathed with a fire rated gypsum board (see
Figure 15). We strongly recommend this procedure for all
installations to prevent cold drafts from originating in the
fireplace enclosure. If you follow this procedure, we
recommend that you do not insulate the wall above the front
of the fireplace.
REMEMBER:
Check local codes concerning installation
requirements and restrictions in your area.
MASONRY CHIMNEY
Installing your PEARL3600 fireplace with a masonry chimney
still requires using EXCEL chimney from the top of the
fireplace to where it will connect to a listed liner that will run
up inside the masonry chimney (see Figure 16).
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. You can use either the EXCEL liner or any other listed liner to ULC-S635, ULC-
S640 or UL-1777.
Special care is to be taken to make sure that you have a good solid connection between the EXCEL chimney and
the liner. A masonry adaptor (FO-FDM6) was designed specifically for that purpose and is available from your RSF
dealer. It will attach to the liner with 3 stainless steel rivets (provided) and to the EXCEL chimney with 3 screws
(provided).
After mortaring in place, the
connection between the EXCEL
chimney and the liner should not be
visible in order to isolate the heat
released through the liner from the
fireplace enclosure.
As depicted in Figure 16, you must
install at least one 18" length of
EXCEL chimney after the EXCEL
chimney elbow. The uppermost part
of the EXCEL chimney - where it
enters the masonry chimney - must
be a minimum of 12" from the ceiling.
NOTE:
If the ceiling is high enough,
you can install one or more EXCEL
chimney lengths directly on the
fireplace before the elbow.
*Refer to text to determine the appropriate flashing
Figure 15 Chimney Installed with a Chase
Enclosure Example
Figure 16 Connection to a Masonry Chimney
Mortar
Mortar
Clearances as per
NBC or NFPA 211
EXCEL liner or other listed liner to
ULC-S635, ULC-S640 or UL-1777
12" min. to
combustible ceiling
EXCEL chimney
lenght: 18" min.
EXCEL chimney
elbow
Masonry Adaptor
FO-FDM7
Metal
Firestop
Liner
Elbow
RSF
Fireplac
e
FO-FDM6
