Page
5
of
16
150oc.
Consideration
should
be
given
to
the
effect
of
expansion
and
contraction
caused
by
temperature
and
back
panels
should
be
allowed
to
float
or
attached
with
a
flexible
mastic
on
the
extreme
edges.
4.8
The
hearth
must
be
a
minimum
of
12mm
thick
with
the
top
surface
standing
a
minimum
of
50mm
above
surrounding
floor
level
or
surrounded
by
a
raised
fixed
fender
of
50mm
high.
The
hearth
must
extend
a
minimum
of
100mm
in
front
of
the
fire
bed
and
100mm
either
side
giving
an
overall
width
of
600mm.
4.9
The
firefront
supplied
with
the
appliance
must
be
used.
Any
other
type
could
affect
combustion
or
overheat
the
gas
controls.
4.10
If
fitting
into
an
existing
fireplace
or
flue,
the
flue
and
cavity
MUST
be
blocked
off
completely
and
the
supplied
cavity
box
fitted,
this
is
to
help
prevent
suction
on
the
back
of
the
appliance.
(The
cavity
box
is
not
air
tight
and
its
installation
does
not
negate
the
need
to
seal
any
existing
chimney
or
flue)The
top
of
the
flue
should
also
be
capped
off
to
prevent
the
entry
of
moisture
etc,
consult
building
control
if
in
any
doubt.
4.11
If
fitting
into
an
opening
in
a
cavity
wall,
or
into
a
void
or
false
chimney
breast,
create
a
sealed
chamber
for
the
fire
to
fit
into
and
then
use
cavity
wall
box
supplied.
Failure
to
do
so
can
result
in
the
pull
from
the
cavity
causing
heat
build
up
on
the
fire
surround,
back
panel
or
moisture
ingress
from
the
cavity.
4.12
Any
under
grate
draught
devices
must
be
sealed
off.
4.13
If
using
the
fire
in
a
hole
in
the
wall
application
(more
than
150mm
above
floor)
a
small
hearth
50mm
deep
will
be
required
to
support
the
fire
front.
No
other
hearth
is
required.
For
all
other
applications,
use
the
hearth
sizes
in
4.8.
4.14
Closure
plate
tape
and
foam
seals
are
unsuitable
for
fixing
and
sealing
the
fire
into
place.
Always
fix
with
the
fixing
cables
or
through
the
base
of
the
fire.
5.
CLEARANCES
TO
COMBUSTIBLE
MATERIALS
AND
SHELVES
5.1
A
non
combustible
shelf
may
be
fitted
to
within
50mm
of
the
top
edge
of
the
fire
frame.
Note
that
shelves
will
get
hot
and
delicate
ornaments,
wax
candles
etc
should
be
kept
away
from
hot
surfaces.
5.2
The
wood
of
the
fire
surrounds
may
be
fitted
to
within
100mm
of
the
sides
of
the
firebox
provided
it
protrudes
no
further
forward
than
100mm.
Any
combustible
side
walls
must
be
at
least
500mm
from
the
fire
bed.
Maximum
depth
of
shelf
100mm
150mm
200mm
Minimum
distance
from…
250mm
300mm
350mm
…top
of
frame
to
underside
of
shelf.
5.3
NOTICE:
Discolouration
of
wall
surfaces
‐
Generally,
heating
appliances
will
create
warm
air
convection
currents
that
will
transfer
heat
to
any
wall
surface
against
which
they
are
located.
Some
soft
furnishings
(including
blown
vinyl
wallpapers)
may
not
be
suitable
for
use
where
they
are
likely
to
encounter
temperatures
above
the
normal
room
level.
For
this
reason,
the
manufacturer’s
advice
should
be
sought
before
using
this
type
of
wall
covering
adjacent
to
any
heating
appliance.
The
likelihood
of
wall
staining
caused
from
convected
air
currents
will
be
increased
in
areas
where
high
levels
of
tobacco
smoke
or
other
contaminants
exist
.
A
C
B
D
E
Outer wall
Inner
Cavity
Surroun
Marble
Gas supply routes when fire is
inset into the cavity wall
A = Through wall – Pipe
must be sleeved and
sealed to fire
B & D = Sleeve pipe
behind surround and seal
to fire
