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CHIMNEYSTÛV 21
.3 MASONRY CHIMNEY
If you plan to use an existing masonry
chimney, you must have it inspected by
competent authorities to confirm the
following points :
• The masonry chimney is properly
constructed, fully lined and complies
with municipal by-laws and the National
Building Code of Canada (NBC) or
National Fire Protection Association
(NFPA 211) standard.
• The masonry chimney has been
completely cleaned of all soot and
creosote residue and has been
inspected to confirm that it is still
in good working order. There is no
insulation of any kind in contact with
the masonry chimney and there is
no insulation of any kind trapped
anywhere in the chimney.
• All necessary clearances around the
masonry chimney, along the entire
length of the masonry chimney, are
complying with CNB or NFPA 211. If the
masonry chimney is enclosed behind
drywall boards, openings must be
made to confirm all clearances.
• The masonry chimney will be used only
for the fireplace and not for any other
appliance.
• If major repairs are required to meet
the above mentioned points, a new
masonry chimney will have to be built.
To make a hole in the masonry chimney and
connect it to the fireplace, we recommend
that you follow these steps :
• Determine and mark where the chimney
is to be inserted into the masonry
chimney. Using a large masonry drill
bit (/ to 2''), drill a hole exactly in the
centre of the oval line. Using a masonry
hammer and drill, gradually widen the
hole to the desired size. Remember
to work from the centre of the hole
to the outside. Be particularly careful
when drilling the fired clay liner behind
the brick as the other three sides must
remain in place.
• Slide the stainless steel liner from the
top of the chimney down. If you are
using a rigid liner, you will need enough
space to fix an elbow with at least 2
rivets. If the rigid liner does not slide
easily or if the masonry chimney has
an interior opening of less than 10'' X
10'', a listed flexible liner can be used
with a flexible/rigid adapter (LM-7LAF)
available from a chimney dealer.
• Install the rigid liner elbow and masonry
adapter at the lower end of the liner.
• Push the fireplace forward to install
the chimney (elbow and length) and
then push the fireplace back into place
while connecting the chimney to the
masonry chimney adapter.
The installation of a Stûv fireplace
in a masonry chimney still requires
the installation of a section of a
chimney above the fireplace until it
connects to the listed liner that will
line the inner surface of the masonry
chimney. A rigid stainless steel liner
must be installed inside the fired clay
liner inside the masonry chimney. The
rigid liner does not replace the fired
clay liner in any way. You can use any
liner listed to ULC-S635, ULCS640 or
UL-1777 standards. You must ensure
that the chimney section and the
liner are strongly secured together.
A masonry adapter FO-FDM(-) has
been designed specifically for this
use and is available from a dealer.
This adapter attaches with 3 rivets
(supplied) to the rigid liner and with
3 screws (supplied) to the chimney.
Once the mortar is in place, the joint
between the chimney and the rigid liner
should not be visible in order to isolate
the heat released through the liner
from the fireplace enclosure. You must
install a section of chimney of at least
46 cm after the chimney elbow.
The highest point of the chimney,
where the chimney enters the masonry
chimney, must be no less than 31 cm
from combustible ceiling materials.
If ceiling height permits, install one of
the chimney lengths directly on the
fireplace, before the elbow. If a flexible
liner is used, the cleaning should be
carried out carefully so that it is not
displaced.
CAUTION
!
Listed liner to ULC-S635,
ULC-S640 or UL-1777
Mortar
Chimney (min. 18'')
Chimney elbow
Observe clearances according to
NBC or NFPA 211
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