Kostrzewa Mini Bio Manual De Uso página 70

5. Design guidelines
70
Tip:
Connect the flue ducts without any loads and stresses
seal the flue duct
the flue must be opened upwards and lead horizontally at least
1 metre over the roof surface (with a rain cap)
flue diameter must be selected in accordance with the flue liner
manufacturer's requirements estimate cross sectional area of a
circular flue is calculated using a Redtenbacher's equation:
A = 2,6 * Q / (n * H^0,5)
where:
A – flue diameter [m
Q – boiler heat output [kW]
n – coefficient within the following range 900 -1880
(n = 900 for wood)
H – flue height [m]
CAUTION!
The installed flue system requires commissioning
and inspection of the following:
documentation
and mounting materials used for installation.
The device has to be commissioned by authorized
personnel with a report.
Experts in heating
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5.F Fuel quality requirements
Pellets
Sawdust granulate (pellets) made to ISO 17225-2:2014 – Class A1
are a basic type of fuel used in Mini Bio / Mini Bio Luxury boilers
diameter: 6 ± 1 mm ; 8 ± 1 mm
length 3.15 ≤ L ≤ 40
moisture content ≤10%
ash content ≤0.7%
calorific value 16.5 – 19 MJ / kg
density ≥ 600 kg/m
Oats / Pellets
Mini Bio/Mini Bio Luxury boiler is tted with a burner grate for
Mini Bio / Mini Bio Luxury boiler may be fitted with an optional burner
the combustion of oats and wood pellets mixture (50:50 ratio).
grate for combustion of oats and wood pellets mixture (50:50 ratio)
Oats moisture content ≤12%.
and low quality pellets (high ash content, lower calorific value). Oats
moisture content ≤12%. The burner grate replacement for the oats
grate is included in section 7.G
CAUTION!
Use the fuels from reliable sources only. The fuels must
have a suitable moisture content and low proportion
of fines. The wood pellets should not contain mechanical
impurities (stones etc.) which may affect the combustion
process and damage the device. Kostrzewa is not liable
for any damage or incorrect combustion process as
a result of using unsuitable fuels.
Failure to comply with the fuel quality requirements may result in damage
to the heating system components (e.g. boiler, feeder) and is not
covered by the warranty. It may invalidate the warranty and result in
additional charges in case an authorised service centre is involved.
Mini Bio and Mini Bio Luxury User Manual - ENGV 08.15
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