Reduced Burning; Risk Of Explosion - Heta Scan-line 7 Series Operating And Installation Instructions

fuser at the back of the firebox and ensure that
the wood is retained by the log guard. Always
ensure that the wood is not tightly stacked so
that air can circulate freely.
Do not leave the door open:
Operation with the door open can cause excess
smoke. The appliance must not be operated
with the appliance door left open except as di-
rected in the instructions.
Do not leave the air control completely open:
Operation with the air control permanently open
can cause excess smoke. The appliance must
not be operated with air controls or dampers left
open except as directed in the instructions.
refuelling
You should normally refire the stove while there
is still a good layer of embers. Distribute the em-
bers across the bottom grate, place pieces of
fuel (max 0.7 kg) on the embers in a single layer
perpendicular to the firing opening. Close the
firing door and fully open the start-up mecha-
nism. The wood will then ignite very quickly – i.e.
in 30 seconds or 1 minute. When the wood is
burning with a steady flame, close the start-up
mechanism. Then adjust the secondary airflow
to the level required. For nominal operation (4
kW), the secondary air supply should be 50%
open. When firing, take care not to place the pie-
ces of fuel too closely together, as this will result
in poor combustion and insufficient exploitation
of the fuel. Please note that the start-up mecha-
nism must not remain open during normal ope-
ration of the stove, as this may lead to overheat-
ing. It must only be used until the fuel is burning
with a steady flame.

reduced burning

The stove is well suited to intermittent use. If
you wish to operate the stove with reduced out-
put, simply insert smaller volumes of wood at
each firing, and apply a lower airflow. However,
remember that the secondary combustion air
8
supply must never be shut off completely du-
ring firing. It is important to keep a good bed of
embers. Gentle heat is released when the fire
settles - i.e. when the wood no longer genera-
tes flames and has been converted to glowing
embers.
optimal firing
To achieve optimal firing and the highest possi-
ble effect, it is important to make sure that the air
supply is used correctly. As a general rule, the
secondary air is to be used to control the fire to
ignite the flue gases. This produces a high effect
and keeps the glass panel completely clear of
soot as the secondary air "washes" down over
it. Please note that the stove will, naturally, pro-
duce soot if both the start-up mechanism* and
secondary air intakes are closed completely. This
will prevent oxygen from being drawn into the
stove, and the viewing window and other parts
will become covered with soot. If this situation is
combined with firing with wet wood, the build-up
of soot can become so thick and sticky that the
sealing rope can, for example, become detached
when the door is opened the next day.

risk of explosion

After you add new fuel, it is very
important that you do not leave
the stove unattended until the
wood is burning constantly.
This will normally occur within 30 to 60 seconds.
A risk of explosion can possibly arise if too much
wood is placed in the stove. This may result in
the production of large volumes of gas, and this
gas can explode if the intake of primary and se-
condary air is insufficient.
It is an advantage always to leave some ash
lying in the bottom of the combstion chamber.
Take care when emptying the ash pan, as
cinders can continue to burn in the ash for
long periods of time.