RAIS Q20 User Manual download pdf (Page 14)

ENGLISH RAIS - manual for Q-20

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 Kg dry wood pr. m

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%

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.

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 65 66

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RAIS Q20 User Manual Page 14