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2.1.2 Firewood loading and permitted fuels
Below please find an overview of the permitted fuels and fuel
quantities:
Bullerjan B² flex
Fuel quantity per
hour
Fuel type
2.1.3 Instructions for optimal igniton and operation
Step 1: Open the combustion chamber door and insert two
logs of wood (each 25 cm long/max. 800 g) transversely into
the combustion chamber (cut edge upward).
Step 2: Stack up to a kilo of commercially available kindle
wood (3–5 layers) evenly on the already loaded wood logs.
Step 3: Now place 2–3 firelighters on the kindle wood and
ignite these. Please close the wood stove door and
completely open the air supply control (as per 2.2.1).
While the kindle wood burns, ember falls between the inlaid
wood logs, which as a consequence start to burn. This
process may, depending on the draught conditions of your
chimney and the specifics of the wood, take up to 35 minutes.
An ember-bed thereby slowly forms.
The combustion chamber door should not be opened during
this period, so that the wood stove can reach its optimal
operating temperature as quickly as possible.
Please note that in the heating-up phase soot and possibly
condensate may sediment on the viewing window of the
stove. This soiling can not be ruled out completely when
burning natural solid fuels and does not constitute a defect.
Once this process has been completed and only a small flame
pattern is still visible, the wood stove has reached a sufficient
operating temperature. Now it can burn the appropriate
amount and quality of wood (see table above) most efficiently.
19
Nominal
5.0
heat output
kg/h
1.5
1 log
Dry firewood –
25 cm
beech tree
transverse
Step 4: First, carefully open the door for just one centimeter
and wait until the fire has adapted to the new draught
situation (2–3 seconds). You can now slowly open the door
and insert an appropriate additional amount of wood. The air
supply to the wood stove should now be reduced according
to point 2.2.2 of this manual.
Also now, the soot that has possibly formed on the viewing
window during the heating-up phase will, to a large extent,
be burned clean.
Please note that the ignition of the additionally laid logs
always takes some time (3–4 minutes), since the wood first
has to reach a certain temperature.
Important: The over-feed with wood does not lead to a con -
siderably increased heat transfer to the installation room;
rather the excess energy is discharged into the chimney
and air pollution is significantly higher.
Important: Do not use flammable liquids such as alcohol or
petrol to light the fire.
Normal heating operation: While the wood burns in the
combustion chamber, the door must not be opened. This is
to prevent smoke from escaping into the installation room.
Wait until the flames have burned down before inserting
additional firewood.
The wood in the combustion chamber burns off very slowly,
since the stoves B² flex were developed for low kW
performance and high efficiency.
Important: Never use treated or plastic-coated wood, chip-
board, sawdust, wood chips, coal, coke, paper, cardboard
or similar materials. The use of such materials leads to a
very high degree of environmental pollution and can
cause sustainable damage to the Bullerjan B² flex.
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