Adjusting The Combustion Air - RAIS Topas Manuel D'utilisation

US English User Manual RAIS Topas & RAIS Opus

Adjusting the combustion air

All RAIS stoves are equipped with an easy-to-use handle for adjusting the air control. For
the various positions of the control please see the following illustrations. To ensure proper
combustion process it is very important to supply the correct quantity of air at the right time
and place. The adjustment range made from factory may not be altered for increasing firing
for any reason.
Primary air is defined as combustion air for burning the mass of wood and stimulates pro-
duction of volatile gases.
Secondary air is used to burn off the gases at high temperatures (above 1,000°F/540°C) and
to keep the glass free of soot. The secondary air is let through the air control beneath the
combustion chamber and is heated through the side channels, which is then directed to the
glass. The warm air runs along the glass, keeping it free of soot.
At the very back of the combustion chamber there is a tertiary channel at the top that helps
to combust the remaining gases.
When positioning the air control between Pos. 1 and 2 optimum utilization of the energy
contents of the wood is obtained, because of sufficient oxygen for combustion. When the
flames burn bright and yellow, the control has been adjusted correctly. Finding the correct
position takes some trial and error, but is easy to find.
Never close the air control completely when using the stove. A typical error is to close the
control too soon, because the heat gets too intense. This results in the appearance of a dark
cloud of smoke from the chimney and that means the energy value of the wood is not being
used properly.
It is important for proper control of the fire that the instructions in the manual are followed
and the stove door normally is kept closed. It is also necessary to keep the seals in a good
condition.
18