
12
Stabilization of the combustion mode.
Degrees of heat output modulation.
The operation process develops in several stages.
Upon the "Start” command the fireplace begins with a cycle of intense air purging
of the firebox, in order to guarantee the cleanliness of the firepot and checks the
chimney passability.
Ignition is done with the help of a 250W electrical heater and a forced supply of
air, which flows around it being thus heated to a temperature, which is sufficient to
kindle the initial dose of pellets fed into the firepot. This process continues until the
emergence of a stable flame, which is detected by a sensor, reading the temperature
of the gases in the flue gas fan.
Upon reaching the pre-set temperature the fireplace transitions into fire-up mode,
which is fixed by time. This is necessary because the burning is still not stable and
transitioning to higher volumes of air and pellets, characteristic of Р3 output level may
actually cause flame extinguishing.
In case the pre-set temperature is not reached, the process of ignition is repeated.
Upon second unsuccessful ignition the fireplace returns an error "UNSUCCESSFUL
IGNITION" and remains in waiting mode until elimination of the cause of this error.
Then follow three operating modes of Modulation by output from Р1 to Р3, equally
distributed.
The operation modes of the appliance are fully automatic and their control is in
accordance with the pre-set stage of modulation and the desired room temperature.
In operation mode the appliance constantly strives to reach the pre-set
temperature, whereupon automatically transitions to lower stages of power and vice
versa.
Optimal operation mode with complete combustion and low pellet consumption is
the setting where no frequent ignition and shutting down are required.
Nevertheless, if in minimum output mode the room temperature exceeds the pre-
set hysteresis, the appliance shuts down and remains waiting for a new automatic
ignition, whereupon the display shows function ECO.
Automatic air purging of the firebox with maximum speed of the flue gas fan is done
from time to time and in accordance with the output stage selected.
Forced shut down of the appliance is done via the start/stop icon on the display or
automatically, by command from the weekly programmer. In this mode, pellet feeding
is stopped, air flow is increased in order to achieve complete burning of the fuel in the
firebox.
Then follows a mode of final air purge, wherein the fan provides maximum air flow,
and finally the appliance is shut down.