Fuel - RAIS 900 Manuel D'utilisation

English
Operating instructions
Please note that HETAS Ltd Appliance Approval only covers the use of dry sea-
soned wood logs on this appliance. HETAS Ltd Approval does not cover the use
of other fuels either alone or mixed with the wood logs, nor does it cover instruc-
tions for the use of other fuels

Fuel

The stove is designed and approved in accordance with EN 13240 and NS 3058 for stok-
ing split, dried firewood. The firewood must have a water content of 15-22% and its max.
length should be the length of the combustion chamber minus 50-60 mm.
Stoking with wet firewood causes both soot, environmental pollution and bad fuel
economy. Freshly cut wood contains approx. 50-70% water and is thoroughly unsuitable
for stoking. Count min. 1 year of storage time for newly cut wood before using.
Wood with a diameter of more than 100 mm should be split. Regardless of wood size, it
should always have at least one surface area free of bark.
We do not recommend stoking with painted, laminated or impregnated wood, wood with
a synthetic surface, painted refuse wood, chipboard, plywood, domestic waste, paper bri-
quettes and pit coal, as this will produce malodorous smoke, which could be poisonous.
When firing with the above-mentioned items and amounts larger than those recommend-
ed, the stove is subjected to a larger amount of heat, which results in a higher chimney
temperature and lower efficiency. This can result in the stove and chimney becoming dam-
aged and would void the warranty.
The calorific value of the firewood is closely connected to the moisture level of the
firewood. Moist firewood has a low heat value. The more water the wood contains, the
more energy it takes for this water to vaporise, resulting in this energy being lost.
ONLY USE RECOMMENDED FUELS
The following table shows the calorific value of different types of wood, which have been
stored for 2 years, and which have a residual moisture of 15-17%.
Wood
Hornbeam
Beech and oak
Ash
Maple
Birch
Mountain pine
Fir
Poplar
1 kg of wood yields the same heat energy irrespective of wood type. 1 kg beech merely
takes up less space than 1 kg of fir.
44
.
Kg dry wood pr. m
640
580
570
540
510
480
390
380
RAIS - manual for RAIS 900
3
compared to beech/oak
110%
100%
98%
93%
88%
83%
67%
65%