PRITY KPW 24, Installation And Operation Manual

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until the emergence of a stable flame, which is detected by a sensor, reading the
temperature of gases in the housing of the flue gas fan. Upon reaching the pre - set
temperature the stove transitions into warming - 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 higher capacities may well result in extinguishing the flame.
In case the pre - set temperature is not reached, the process of ignition is regarded as
unsuccessful and the display shows an error. The reasons for this are covered in the section
about the emergency modes.
Next mode is operation modulation, and it is divided into five stages Р1 - Р5, equally
distributed from minimum to maximum, where the minimum is 30% of the maximum.
The operation mode of the appliance is fully automatic and its control is in accordance
with the pre - set stage of modulation and the desired temperature of the heat - transfer
agent or with the room air temperature.
If required, room air temperature control from an external thermostat may also be set
up and to this end, this option must be enabled from the user menu.
In operation mode the appliance will constantly strive to achieve the pre - set
temperatures, 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.
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 power stage selected.
Forced shut down of the appliance is done via the Start/Stop button from the display
or automatically, by command from the weekly programmer /Timers / . 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 purging, wherein the fan provides maximum air flow,
and finally the appliance is shut down.
The values of the parameters in the respective modes are pre - programmed and tested
but they are subject to adaptation, in accordance with the pellets’ quality and the chimney
specifics.
5.3. Description of the control panel with Fumis Premium display