There must be no leakage of smoke through the structure of
the chimney during or after the smoke pellet test and it is
important to check inside upstairs rooms adjacent to the chimney /
flue
. Check the chimney pot / terminal and general condition of the
brickwork or masonry. If the chimney or flue is in poor condition or if
there is no up-draught do not proceed with the installation. If there is a
history of down-draught conditions with the chimney / flue, a tested and
certificated flue terminal or cowl suitable for the relevant flue type should
be considered.
6.
A spillage test must always be carried out during commissioning of
the appliance.
1.6
FIRE PLACE OPENING AND CHIMNEY CATCHMENT SPACE
The front opening of the fire place must be between 350mm and 400mm wide,
and between 490 and 500mm high. If the opening exceeds these dimensions then
a surround must be constructed from suitable non-combustible material to produce
a correct size opening. Any surround must be suitably sealed to the fire place to
prevent leakage. See below in figure 1.
When installing into a brick built chimney, you must ensure that there is sufficient
depth to accomodate any debris which may fall from the chimney. This depth
must be sufficient to accomodate 12 litres of volumetric space.
Fire Opening
350mm Minimum
400mm Maximum
520mm
Minimum
420mm Minimum
Fig. 1
490mm Minimum
500mm Maximum
NOTE : Minimum
25mm clearance
for fascia also
required below
bottom edge of
opening
Minimum Flat
Sealing Area
6
