Stukje uit de tekst wat ik ben tegen gekomen over het vlambeeld. Helaas even in het Engels, maar dat moet vast lukken..
2.2.5. Combustion control
To be certain that the choice of the recipe carried out is correct, light the stove and check the combustion when the flame is established and regularised.
The flame must have yellow sides and be white in the centre, not excessively slow or too oxygenated. Observing the flame, the upper tip must be sucked towards the high part of the combustion chamber and also, it must always remain within the outline of the grate and not overflow the sides.
The bottom of the grate must always be visible, indicating that the entire pellet that falls during a reduction motor cycle, completely burns before another load cycle.
The flame must also “pulsate” (move up and down) indicating that the loaded pellet is burnt instantly.
The too oxygenated flame, is low, very white and “nervous” and the members of the pellet tend to fall from the grate.
The most evident problem is a constantly low flame and a tendency to extinguish the fire especially at low power.
A poorly oxygenated flame is orange, sluggish and tends to produce wisps of smoke. The glass and the ALUTEC® (white internal refractory) quickly become dirty and blacken.
The most evident problem is the accumulation of pellets inside the grate.