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

embers. Distribute the embers across
the bottom grate, place pieces of fuel
(max 0.7 kg) on the embers in a single
layer perpendicular to the firing ope-
ning. Close the firing door and fully
open the start-up mechanism. 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 le-
vel required. For nominal operation (4
kW), the secondary air supply should
be 50% open. When firing, take care
not to place the pieces of fuel too clo-
sely together, as this will result in poor
combustion and insufficient exploita-
tion of the fuel. Please note that the
start-up mechanism must not remain
open during normal operation of the
stove, as this may lead to overheating.
It must only be used until the fuel is
burning with a steady flame.

Reduced burning

The stove is well suited to intermit-
tent use. If you wish to operate the
stove with reduced output, simply
insert smaller volumes of wood at
each firing, and apply a lower airflow.
However, remember that the second-
ary combustion air supply must never
be shut off completely during 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 generates flames and has been
converted to glowing embers.
Optimal firing
To achieve optimal firing and the
highest possible 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
6
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, produce 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 una-
ttended 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 st-
ove. This may result in the production
of large volumes of gas, and this gas
can explode if the intake of primary
and secondary air is insufficient.
It is an advantage always to leave
some ash lying in the bottom of the
combstion chamber.