Firing Instructions - Jydepejsen Sigma Mode D'emploi

7. Firing instructions

It is crucial to ensure optimal up-draft in the chimney, at least 12 Pa. It is essential that the chimney and the wood-burning
stove work together. In essence, the up-draft is affected by the length and area of the chimney but also its pressure
tightness. The least recommended chimney length is 3.5m and the most suitable cross-sectional area i 150-200cm² (140-
160mm in diameter). Your dealer or chimney sweep will be able to assist you with all chimney issues. If you have not used
your chimney for a long time, it should be checked for blockages before use. In some cases, it will be relevant to install a
damper device to control the up-draft in the stove.
The stove is designed and approved in accordance with EN13240 and NS 3058 for the combustion of split dry birchwood.
The water content in the wood should between 12% and 20%. Using wet wood results in tarry soot, environmental
nuisances and a bad fuel economy. Recently felled wood has a water content of approx. 60 - 70% and is completely unfit
for firing. Recently felled wood usually requires 1 year or more to dry. Regardless of its size, the wood should be split in
order to have at least one bark-free surface.
Never use impregnated wood, painted wood, plastic laminate, plywood, chipboard, water, milk cartons,
printed matter or similar as these may release toxic, corrosive or dangerous fumes when burned.
Furthermore, they may produce the toxic gas, dioxin, which will damage your wood-burning stove and the
environment. The use of such materials voids the warranty. USE RECOMMENDED FUELS ONLY.
Once this is settled, it is important that you get the stove and the chimney to work together. This may be achieved by
following these instructions and use easily flammable fuel in the fire chamber until you have achieved a healthy up-draft.
Kindling and combustion problems often result from wet wood or up-draft failure in the chimney. In such cases, you should
check if the passage through the flue is partially or fully blocked and if the baffle plates are positioned correctly. In case of
superheating or chimney fire, shut off the air supply and monitor the status closely. Never use water to put out a chimney
fire as this instantly produces steam (the water evaporation ratio is 1:1700) which could seriously damage the chimney due
to the rapid pressure increase.
It is important that you know that the paint will harden the first few times you use your stove. This means that your stove will
produce smoke and smell which will disappear after approx. 1 hour. Airing is recommended at this stage. Furthermore, you
should not touch the stove until the paint has hardened as it might peel off.
Sheet iron wood-burning stoves may produce a crackling sound during the kindling and cooling stages. This is normal for
sheet iron stoves and is not a defect.
DuplicAir®
The stove is fitted with a DuplicAir® air wheel - a customized air controlling system that regulates kindling and combustion
air. DuplicAir® is operated by means of a handle on the front of the stove.
Use of DuplicAir®
The air wheel has the following settings and functions:
1. The handle in position 1 (fully to the left): both combustion air and kindling air are closed.
2. The handle in position 2: combustion air is 50% open.
3. The handle in position 3: combustion air is fully open.
4. The handle in position 4 (fully to the right): both combustion air and kindling air are fully open.
This setting may be used for a short while during kindling only.
Once the wood has caught fire, the handle should be placed in position 3 or less (to the left) depending on the heat
requirement.
The handle may also be placed between the settings. You should not turn it down so much that the fire dies. Flames should
be visible in the fire chamber at all times.
Note! The stove and the chimney react differently in cold, respectively, warm weather and on windy, respectively, quiet
days. Hence, you should adjust the air flow.