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The best fuel material are burning logs of high density
3
hardwood (over 500 kg/m
whose calorific value equals
2
about 2100 kWh/m
- such as beech, ash, oak,
hornbeam.
•
Wood should be stored outdoors, in a dry and well-
ventilated place.
It is not recommended to burn coniferous wood in the
fireplace for a long time because of the resins it
contains, which can quickly lead to burdensome
soiling of the insert. In addition, softwoods are prone
to sparks, which can at times be dangerous due to the
possibility of sparks flying into the room when opening
the door.
•
It is prohibited to burn any materials in the fireplace that
are not natural wood waste, in particular: chipboards,
varnished or stained wood, cardboard and paper, all
kinds of fabrics and plastics.
•
It is prohibited to burn or otherwise use flammable
liquids.
5.2. Fuel feeding and firing up
a)
Check whether the supply and extraction air systems
are not blocked.
b)
Before loading fuel, clean the firebox of excess ash, but
not completely. Move the remaining ash under the rear
wall of the firebox to allow primary air to enter the
chamber from under the front strip.
c)
Place thicker wood logs at the bottom of the firebox.
Gradually place increasingly smaller logs and top them
with finely chopped logs and kindling. Kindling
(preferably rolls of wood wool soaked in paraffin) should
be put on top of the pile and lit from the top, which is the
recommended method for Unico inserts, making burning
cleaner with less smoke emission, which, in turn, makes
the whole process more ecological and efficient.
d)
Open the combustion air inlets completely.
e)
Set fire to the kindling and leave the door slightly
open until the fire does not fade anymore after
closing.
f)
Do not use any liquid kindling, gasoline, thinners, etc.
for the fireplace.
5.3. Burning
a)
When the first load is burnt out and only embers remain,
you can add wood as needed to match the size of the
insert.
You should take into account that from burning 1 kg
of wood we obtain about 3.4 kW, so no more than
4.5 kg of wood should be put into a 15 kW insert.
Adding larger amounts of fuel at one time may
damage the insert.
b)
Logs should be placed as much as possible to the
back of the firebox, so that during burning and sliding
they do not adhere to the glass and fall out when
opening the door.
.
c)
The door should always be opened slowly in order to
prevent negative pressure and the gases escaping into
the room.
d)
The intensity of combustion is controlled with the
adjustment slide.
5.4. Regulations
•
Combustion air regulation
Primary air for combustion is supplied from outside to
the collector installed underneath the insert. A special
regulation system delivers it to the upper and lower
part of the firebox.
•
Afterburning system
Extreme positions of the lever allow to completely shut
off or open the primary combustion air supply.
Each lever position in between allows to supply the
appropriate amount of air to the upper and lower parts
of the firebox according to demand.
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