20
fig. 7.6.2
fig. 7.6.1
Usually, the correct combustion is obtained upon reaching of the correct ratio between
fuel amount and comburent air amount. In ideal combustion conditions, a clear and lumi-
nous flame is generated, easily visible from the porthole. (
fig.3.4.1 pos.1 - fig.3.4.2
pos.1
)
7.6 Comburent air regulation
The correct amount of primary and secondary comburent air depends on the type and
consistency of the used fuel. Excellent combustion will be obtained after repeated adjust-
ment interventions, conditioned by the used fuel.
The combutrent air is regulated manually by acting in the knob indicated in
fig. 7.6.2.
On-
ce the fuel capacity has been fixed(see following paragraph 7.7) depending on the power
of the boiler and the relative consumption (see
tab. 3.3.1 and tab.3.3.2
), the comburent
air can be optimased with a minimum regulation at 1 and maximum at 2. (
fig.7.6.1
). It
may be necessary in some situations to set an higher level for the positioning of the com-
burent air indicator.
7.3 Regime functioning
After start-up and regulations, the heat generator functioning proceeds automatically.
7.4 Frequent heat request condition
During regime functioning the fuel conveying screw and the comburent air are regulated
by a regulation thermostat:
The screw and electric fans stop once the pre-fixed maximum temperature is reached
When the water temperature has dropped by a few degrees, the screw and the fans
automatically re-start until he subsequent reaching of the pre-fixed maximum tempera-
ture
7.5 Carburation
