12
1
P
S
To bring the flame to optimum conditions
you should
then
adjust the primary air by turning the knob (pos.
P)
. Do the same
for the secondary air (pos. S)
.
Example no.1
Thick damp wood that is difficult to burn
S - Very closed (try to obtain the maximum dimension of
the flame, but not reddish in colour).
P - Reasonably open in order to obtain sufficient gasifi-
cation.
Example no. 2
very flammable wood logs
S - Completely open.
P - Slightly closed in order to keep gasification low, but
sufficiently open to evacuate the ash that might close the
combustion head.
GENERAL ADvICE
- Better performance will be achieved after two or three
days of running. In fact the refractory material must be
fired and the tar must encrust the upper walls of the
wood storage compartment.
- The flame should have a good size and fairly fill the
combustion chamber.
- The flame should not be too red (lack of secondary air
S).
- The flame should not be too blue (excess of secondary
air S).
- The flame should not be too noisy (excess of primary
air P).
- The flame should not be too small (lack of primary air
P).
- If the ashes do not go down well (increase primary air
P).
- If too many ashes fall (decrease primary air P).
- If the chimney is smoking (open secondary air S all the
way).
- If smoke continues to escape (open secondary air S to
a maximum, choking primary air P partially as well).
6.8 - CHECKS TO BE CARRIED OUT AFTER
COMMISSIONING
CHECKING SEALS
During the initial start-up, check the tightness of the
smoke circuit and connection to the chimney. If there is
any noticeable smoke leakage, alert the installer and/
or our After-Sales Service. If there is any noticeable air
suction through the door seals, tighten the handle with
greater force.
Make sure the working thermostat Te (32) is in good run-
ning order at full power until it stops the fan.
Check for leaks from plumbing connections.
1 Air adjustment unit
S Secondary air adjustment screw
P Primary air adjustment screw
AIR ADJUSTMENT FAULTS
1) If the primary air is excessive, a lot of ash and small
pieces of coal will fall. The flame is too fast, dry, has a cold
colour and is noisy.
The boiler is consuming a lot of wood and the door’s
insulation is white.
2) If the primary air is insufficient, the flame will be slow,
hesitant, affected by air currents and by the chimney
draught, very small, incapable of touching the lower cradle,
with low ash production and the door’s refractory insulation
will be dark coloured.
3) If the secondary air is excessive. the flame will be small,
of a bluish colour and very transparent.
4) If the secondary air is insufficient the flame will be big,
it will touch the lower cradle, it will completely fill the com-
bustion chamber and, above all, it will be of a red colour
and not at all transparent.
After the initial start, with the boiler off, open the lower
door and inspect the internal walls and insulation of the
door: they should be of a light colour, indicative of proper
air adjustment.
Otherwise, if the walls are blackened, it means the sec-
ondary air is not adjusted properly (par. 6.7).
