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PHASE 4 -
BOILER FIRING –
Put at the center of the burner refractory frame, over the cast iron grate, small pieces of dry wood in a cross
pattern. Over the pieces of wood put some easy flammable material; avoiding large and square shaped
pieces. Using some thin paper sheets (e.g., newspapers) fire the wood. Press the nr. 10 button to start the
fan and close immediately the wood collecting box door.
When the upper wood collecting box door is open, the display shows ; when closing the door,
make sure that this message disappears.
PHASE 5
–
CHARGING -
When the first layer of glowing coals has appeared, the wood logs main be
charged in the boiler. Slowly open the wood collecting box door, to let the
drafting fan sucking the smoke in the fuel box. Using the supplied tool, slowly
open the door and evenly distribute the glowing coals on the refractory cement
central burner area. After that, the wood logs can be put in the fuel box; the logs
should be almost of the same length as that of fuel box.
Since for getting a good combustion is necessary that the wood logs fall down
smoothly and evenly in the fuel chamber, check that the wood log dimensions,
their shape and the charging pattern don’t create obstacles to their movements.
Before charging again the boiler, let the previous wood charge being burnt
almost completely. A new wood charging can be performed when the glowing
coals layer in the fuel box will be reduced to a thickness of about 5 cm. Put the
new wood logs as shown above.
Useful tips:
Too much long wood logs usually do not fall in an evenly way, they tend to block preventing other
wood logs over them from falling down.
Open slowly the wood chamber door to avoid smoke releasing outside.
During the operation of the boiler, the lower door must remain closed under any circumstance.
Avoid (especially in the middle seasons) to charge too much fuel in the boiler, not to have long stand-
by periods with the fuel box full with wood logs. Under these conditions, the wood in the charging
chamber is dryed due to the high temperature reached, but the corrosive vapours released cannot be
expelled through the boiler smoke outlet, and when they come in touch with the cooler chamber
metal walls they condensate taking place their corrosive action. We do not recommend to completely
fill the wood chamber during the middle seasons (or in summertime for hot sanitary water preparation
purposes), and the wood should not stay more than a day in the wood chamber without being burnt.
PHASE 6 –
COMBUSTION AIR ADJUSTING -
The combustion air flows through the inlet
duct; the flux is then divided in two separate
ducts forming the "primary air stream" and the
"secondary air stream".
The primary air stream amount controls the
boiler operation power and the fuel
consumption rate: more air, more power, more
fuel consumption. The primary air stream can
be easily adjusted rotating the control screw
located on the air inlet duct: turning the screw
lets less air will pass through, whereas rotating
it counter clockwise the air amount will be
higher. The correct primary air amount depends on the wood type and quality which is used: small logs of
well dryed wood will require less primary air, whereas wet larger logs will need more primary air. The
Summary of Contents for ASPIRO DUO TECH
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