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• If you have no external combustion air inlet, ensure you have a sufficient
supply of air to the installation space to prevent any negative pressure from
occurring in that space, and to ensure that no flue gases enter the space.
CAUTION! On controlled ventilation systems, bathroom ventilation systems
and fume extractor fans without a recirculating mode, there is also a risk
of negative pressure (vacuum)!!!
• Note contents of chapter „3.2 Heating and firing“.
• During this first burn, unpleasant odours may be produced. This is because
the anti-corrosion coating inside the combustion chamber is burning into
the steel surface. This is not a health hazard, but it does smell unpleasant.
Ensure sufficient ventilation in the installation space.
CAUTION!
During a burning operation, the surfaces of the window panes
and cladding components can become very hot: Risk of burn injuries!
3.2 HEATING AND FIRING
A good combustion requires correctly prepared fuel, the correct combustion
temperature for each burn-up phase and a suitable supply of oxygen to ena-
ble the system to function in an environmentally friendly and energy-efficient
manner.
3.2.1 IGNITION (DOWN BURN)
Principle:
This firing method is a simple and effective way to reduce the
emissions from fire areas. The stack of wood burns downwards, from top to
bottom. With this firing method, all gases pass through the hot combustion
zone (flames) above the stack, enabling complete combustion to take place.
The wood further down is heated up gradually, gas flows outwards and burns
in the hot combustion zone. The result is combustion that runs much more
uniformly than when setting a fire from the bottom of the stack of wood.
3. BURNING
3.1 INITIAL START-UP
• Check to ensure that all of the documents and accessories enclosed with
the fireplace insert are removed from the combustion chamber.
• The enclosed heat-resistant glove is only intended to provide protection
from the heat when using the operating handle, the ‘cold hand’ and the
damper lever. The glove is not fire-proof.
• Combustion air, depending on the type of fireplace insert, is either regu-
lated by means of the ‘cold hand’ (see chapter „3.2 Heating and firing“) or
without tools, using the telescopically extending operating handle.
• Read the operating instructions thoroughly to learn details about fuels and
other relevant topics (see chapter „2.1 Wood“).
• Initial start-up (commissioning) should be performed in consultation with
the fireplace installer who constructed the fireplace unit, or (better) with
his on-site assistance. All cladding parts must be completely dried to pre-
vent cracks or damage.
** The actual quantity of wood depends on the type of wood
and its related properties.
Wood feed quantity based on the example
of the Varia 1V-51-4S
Nominal heat output 11.0 kW
Wood feed quantity 3.3 - 4.3 kg/h (± 30%)
We always recommend that you burn
split firewood in your fireplace insert.
Triangular-section firewood made of
beech with a radius of 10 cm and a
length of 33 cm weighs about 2.0 kg.
The circumferential edge dimension should be approx. 30 cm. The wood feed
quantity can vary by ± 30%.
Note: on larger fireplace inserts with a combustion chamber width of approx.
60 cm, the firewood can also be about 50 cm in length.
If the quantity added is exceeded consistently by more than 30%, this can
damage the fireplace insert or the chimney. If the quantity of wood drops too
far below the recommended level, low combustion room temperature can lead
to poor burn-up and to sooting up of the window. Please do not drop more than
30% below the recommended quantity of wood. After setting up the fireplace
insert, only light a moderate fire initially. This enables you to avoid cracks in
the combustion chamber covering (which may still contain residual humidity
before the first firing). The amount burned should be increased gradually over
3 to 5 firings to about 30% above nominal heating capacity.
• The wood should be stored in a protected, dry and well ventilated place.
• If the wood is too wet, it will not provide such effective heating, the chim-
ney will soot up and the window will soil more rapidly.
• No open operation with conifer timber containing resin. These types of
wood tend to produce sparks.
Our fireplace inserts are designed for operation with firewood and wood bri-
quettes in acc. with DIN 51731. The use of other fuels is not permitted.
Never any under circumstances should you burn any of the following:
• wet timber, bark offcuts, nut shells or similar woody plant parts
• MDF or coated board materials
• paper, paperboard and old clothes
• plastics and foams
• wood treated with a timber preserving agent
• solid or liquid non-wood materials
• flammable liquids
2.1.3 QUANTITIES OF WOOD
Nominal heat output*
Wood feed quantity**
Images
in kW
in kg/h
5,0 - 6,9
1,5 - 2,3
7,0 - 9,9
2,3 - 3,3
10,0 - 12,9
3,3 - 4,3
13,0 - 15,9
4,3 - 5,3
16,0 - 21,0
5,3 - 7,2
* Please refer to the type plate for the applicable nominal heat output, e.g. for the Varia model range.
Example for an air regulation lever used without tools with a insert
