Electronic pellet burner controller – NPBC-V3C-1/ NPBC-V4C-1/ NPBC-V4E-1
If the photo sensor detects a successful ignition the procedure will be terminated and the burner
proceeds to unfolding the fire.
Unfolding
– Right after the ignition the burner doesn't switch immediately to full power, because this
might extinguish the unsteady fire. This menu sets the process of unfolding the fire on two stages:
burning of the first fuel dose and smooth unfolding. The upper field sets the fans' speed while the first
fuel dose is burning and the duration of this stage in seconds. The main auger does not load new pellets
while the first dose is burning. The bottom field sets for how long the burner should work on P1 and
P2 power levels before switching to the required power level according to the boiler's temperature.
P1, P2, P3 and Suspend power levels
– the settings for these power levels are identical. Set the active
time of the auger to load a portion of pellets (
Feed [Sec]
) and the cycle (
Cycle [Sec]
) between two
portions. The exact amount of the fuel, as well as the speed of the main fan and the exhaust fan are
important for the proper burning process.
It is recommended to set P3 for the maximum possible power that the burner can achieve, P2 for 50%
of P3 and P1 for 20% of P3. Thus, the controller can provide better power modulation between 20%
and 100% by switching between the power levels. For example, if 75% of the power is required, the
controller will switch between P3 and P2 on equal time intervals. The switch time depends on the
system's inertia and the set temperature differences in the menu
Factory Settings → Power
User Manual / ver 3.11
http://www.naturela-bg.com/en/
page 33 of 37
After burning the first dose,
the burner will work 60 seconds
on P1 and 60 seconds on P2
Settings for burning
of the first dose
The auger motor turns on
on every 30 seconds and
works for 3 seconds.
Fuel number
Power level
