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Controller for pellet oven – NPBC-V3C-B
Settings for burning
of the first dose
After burning the first dose,
the burner will work 60 seconds
on P1 and 60 seconds on P2
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.
Fuel number
Power level
The auger motor turns on
on every 30 seconds and
works for 3 seconds.
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
Modulation. The shortest switch time interval could be the cycle between two feedings, which usually
is 20-30 seconds. For such a short period of time, the temperature of the heating installation can't
change significantly and it's impossible for a human to sense the swings between the power levels.
A correctly set Suspend power level can provide even larger range for modulation for the controller.
Make sure that the cycle between two feedings is just as long as the fuel dose needs to burn out, but
not long enough for the embers to cool down, so the next dose can easily ignite.
Interm Clean – This menu sets the intermediate cleaning which is performed while the fire is burning.
The fans temporary increase their speed which results in higher temperature of the fire and leads to
User Manual / ver 3.7
http://www.naturela-bg.com/en/
page 28 of 30
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