RAIS 800, Instructions For Installation, Use And Maintenance Manual

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ENGLISH RAIS ­ manual for Rais 800
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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 Kg dry wood pr m
3
compared to beech/oak
Hornbeam 640 110%
Beech and oak 580 100%
Ash 570 98%
Maple 540 93%
Birch 510 88%
Mountain pine 480 83%
Fir 390 67%
Poplar 380 65%
1kg of wood yields the same heat energy irrespective of wood type.
1kg of beech merely takes up less space than 1kg of fir.
Operating instructions
Please note that HETAS Appliance Approval only covers the use of dry seasoned wood
logs on this appliance. HETAS Approval does not cover the use of other fuels either
alone or mixed with the wood logs, nor does it cover instructions for the use of other
fuels.
Fuel
The stove is designed and approved in accordance with EN 13240 and NS 3058 for
stoking split, dried firewood. The firewood must have a water content of 15­22% and its
max. length should be the length of the combustion chamber minus 50­60 mm.
Stoking with wet firewood causes both soot, environmental pollution and bad fuel
economy. Freshly cut wood contains approx. 50­70% water and is thoroughly unsuitable
for stoking. Allow at least 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
bri­quettes and pit coal, as this will produce malodorous smoke, which could be
poisonous.
When firing with the above­mentioned items and amounts larger than those
recommended, 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 damaged and would void the warranty.
The calorific value of the firewood is closely connected to the moisture level.
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.