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12.2. FIRING CYCLE STARTING
The firing cycle will end when the boiler is succesfully fired and reaches the minimum admitted operating
temperature.
To start the cycle the button 11 must be pressed. (paragraph 6, page 13 The drafting fan will start, allowing
the boiler to fire. At this point, the boiler temperature must reach the value set by the parameter “Minimum
boiler temperature” or "Boiler working temperature" to have one of the two pumps (PB) or (PI) started,
depending upon the heat request in that moment.
The firing cycle is set by the parameter 10, "Standby delay time".
12.3. WOOD LOADING
When an adequate ash bed is available, the upper chamber may be filled with
wood logs. Slowly open the upper wood chamber door, to have the smoke in
the chamber sucked out by the drafting fan. Using the intended poker tool
supplied, slowly open the door and evenly distribute the ashes on the bottom
cement plate. Now, the wood may be loaded, using wood logs as long as the
wood collecting chamber depth.
NOTE: This instructions must be strictly followed. Since it is necessary that the
wood come down smoothly and evenly in the fuel chamber in order to have
good combustion, make sure that the wood logs’ dimensions, shapes and the
loading pattern don’t create obstacles to movement. The wood logs must be
loaded longitudinally, no piece must be put in a raking way or transversely.
Before loading the boiler again, let the existing wood burn as long as possible.
New wood will be loaded when the ash bed thickness in the wood chamber is
reduced to about 5 cm. Perform the new wood loading in the same way as
above.
Useful tips:
Wood logs that are too long usually do not fall in an even way, they tend to prevent other wood logs
over them from falling down.
Open the wood chamber door slowly to avoid releasing smoke outside.
During the operation of the boiler, the lower door must not be opened under any circumstance.
Avoid (especially in the middle seasons) excessive fuel loading so as not to have the boiler in
standby mode for a long time and the wood chamber full. Under these conditions, the wood in the
loading chamber is dried due to the high temperature reached, but the corrosive vapours released
can not be expelled through the boiler smoke outlet, and when they come in contact with the cooler
chamber metal walls they condense performing their corrosive action. For this reason we do not
recommend completely filling the wood chamber during the middle seasons (or in summertime for
hot water preparation purposes), and the wood should not stay more than a day in the wood
chamber without being burnt.
12.4. COMBUSTION AIR ADJUSTING
The combustion air flows through the suction port and
duct located behind the combustion air modulating
device. The air entering the boiler is then divided in two
separate streams called “primary combustion air” and
“secondary combustion air”.
The primary air determines the thermal power of the
combustion process and the amount of burnt wood in
time: the more the air quantity, the more the power, the
more the fuel consumption. To adjust the primary air
stream, turn the adjusting screw located on the air
suction duct: tightening the screw the passage is
reduced, loosing the screw the passage is increased.
The required primary air amount is strictly related to the quality of the loaded wood: well dried wood in small
pieces requires few primary air, while wet wood in large pieces will require more primary air. The secondary
