The
Primary
Air
Sealing
Plate
is
located
on
the
front
of
the
grate.
To
locate
in
position,
slacken
the
two
screws
beneath
the
grate
and
pull
forward,
then
close
the
door
fully,
open
door
and
tighten
screws.
The
stove
can
be
recessed
in
a
suitable
sized
fireplace
but
a
permanent
free
air
gap
of
at
least
100mm
must
be
left
around
the
sides
and
top
to
obtain
maximum
heat
output
and
for
access
to
the
rear
of
the
stove.
There
should
not
be
any
combustible
material
within
a
distance
of
600mm
from
any
surface
of
the
stove.
Furniture
and
general
soft
furnishings
should
not
be
within
900mm
of
any
of
the
stove
surfaces
including
the
stove
pipe
.
In
all
instances
the
stove
should
be
positioned
on
a
non
‐
combustible
hearth.
Allow
an
apron
of
at
least
225mm
at
the
front
of
the
stove
and
150mm
on
either
side.
The
hearth
on
which
the
stove
is
to
be
placed
should
be
not
less
than
125mm
thick
if
the
floor
is
made
of
combustible
material,
and
care
should
be
taken
to
level
the
stove
and
secure
the
hearth.
If
existing
floors
do
not
have
adequate
load
bearing
capacity
then
suitable
modifications
to
load
bearing
plates
must
be
adopted
.
When
the
stove
is
in
the
desired
position
fix
brackets
to
the
back
feet
and
mark
the
hearth
through
the
holes,
remove
the
stove,
and
drill
and
plug
the
hearth
for
securing
the
stove
and
levelling.
See
typical
flue
connection
methods
illustrated.
Upon
completion
of
installation,
the
appliance
should
be
checked
under
fire
for
soundness
of
joints
and
seals,
and
also
that
all
smoke
and
fumes
are
taken
from
the
appliance,
up
the
chimney
and
emitted
safely.
Care
should
be
taken
that
all
flues,
hearths
and
combustion
air
supplies
are
in
accordance
with
the
current
Building
Regulations,
Local
Authority
By
‐
laws,
British
Standards
and
Codes
of
Practice.
The
Sirius
405
has
no
ventilation
requirement.
Considerations
and
provisions
must
be
made
for
any
other
appliances
requiring
ventilation.
An
extractor
fan
must
not
be
used
in
the
same
location
as
the
appliance.
This
appliance
is
not
to
be
used
with
a
shared
chimney
.
OPERATION
Primary
Air
Primary
air
is
controlled
via
the
sliding
vents
in
the
bottom
of
the
door,
this
provides
a
conventional
air
draught
to
the
bed
of
the
fire.
Slide
to
the
left
to
introduce
more
air
and
to
the
right
to
reduce
the
air
flow.
Secondary
Air
Secondary
Air
is
controlled
via
the
sliding
vent
above
the
door,
it
is
this
‘airwash’
that
keeps
a
clean
and
uninterrupted
view
of
the
fire,
also
aiding
in
good
secondary
combustion
of
fuel
and
reducing
emissions
into
the
chimney
and
environment.
Tertiary
Air
‐
SIRIUS
645
ONLY
The
Sirius
645
is
fitted
with
a
tertiary
(third)
air
control
system.
Air
is
bled
into
the
stove
from
the
rear
panel
via
an
air
duct
over
the
rear
brick.
Its
function
is
to
ignite
unburned
gasses
assisting
with
a
clean
burning.
It
is
advisable
to
clear
these
holes
and
the
duct
from
time
to
time,
especially
when
the
stove
is
being
serviced
or
after
long
periods
of
burning
–
particularly
“
dirty
”
fuels
such
as
damp
wood
or
bitumous
coal.
ONLY
CARRY
OUT
THIS
AND
ALL
SERVICING
PROCEDURES
WHEN
THE
STOVE
IS
COLD.
This
tertiary
air
supply
is
permanently
open
and
allows
a
small
amount
of
air
into
the
stove.
The
holes
can
be
plugged
using
the
two
screws
provided
(item
C
in
the
accessory
pack).
If
your
chimney
has
a
poor
draft,
or
you
regularly
use
smokeless
fuel,
the
heat
shield
covering
these
tertiary
air
holes
will
need
to
be
removed,
the
plugs
fitted
and
the
heat
shield
replaced.
One
or
both
plugs
may
be
used
depending
on
the
draft.
Damper
Assembly
(optional)
When
burning
wood
only,
a
damper
assembly
may
be
fitted.
When
the
damper
is
set
in
the
open
position,
the
chimney
draws
at
full
draught,
increasing
the
volume
of
air
flow
through
the
stove
and
flue.
Shutting
the
damper
restricts
the
flow,
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