Electronic pellet burner controller - NPBC-V3M-1 / NPBC-V4T-1
5. After detecting the burning fire, there is an option to wait for the first dose of pellets to
completely burn out, without feeding a new portion for a certain time. This might be set from
the menu
Initial burning
.
6. If by the end of the ignition cycle, realized by the above 4 steps, the fire doesn't flare up, a few
more cycles are performed, starting with pellet feeding and turning on the heater without air
fan. Set the number of retries from
General Setup
, line
Retries.
To avoid the burner to jam up
with not-flared pellets, the amount of new portion of pellets is half of the previous portion. New
portion of pellets is loaded only for the first three ignition attempts: 100%, 50% and 25% of the
set amount.
7. If the fire doesn't start after all of the retries, an alarm
Ignition Fail
occurs and no more retries
are going to be performed.
The burning phase is indicated by any of the following symbols in the upper right corner of the screen:
,
,
or
. The burner works on its lowest power level indicated by
while going from
igniting to burning until the fire flares up. After that the burner goes on its second power level
indicated by
. The time for the burner to work on these two power levels can be set from the menu
Burning StartUp
. After igniting phase, the power is regulated depending on the difference between
the temperature in the boiler and the set temperature. The power regulation is on three levels with
additional level for suspending the fire only. For each level you can set the fan speed, amount of
pellets and frequency of loading. When the difference in temperatures is smaller than the set
differential temperature for the first power level, the burner goes to Suspend mode, indicated by
. If
the Suspend mode continues longer than the set time for this mode and there is no need of increasing
the power, the burner turns off. If the difference in temperatures reaches the necessary difference for
the first power level while the burner is in suspend mode and if there is still embers, it will inflame
automatically.
When turning off, no matter manually or by a timer, the burner goes to extinguishing phase. This is
indicated by the symbol in the upper right corner of the screen. The fuel loading stops and the fan
runs on low speed for preventing a back fire to the container with pellets, while the rest of the pellets
burn out. When the sensor indicates that there is no fire, the burner goes to cleaning phase and after
that in initial state.
The controller can be set for up to 4 automatic intermediate cleanings for twenty four hours. At the
time set for automatic cleaning the burner turns off, cleans and then starts automatically.
The cleaning process is as follows:
1. The burner turns off.
2. The main blower turns on and works on maximum power for time, set in the menu
Cleaning
on Stop
, line
Fan
.
3. After the above time is up, the additional fan turns on and works along with the main blower
for time, set in the menu
Cleaning on Stop,
line
Cleaner.
If this cleaning method is unnecessary, it could be deactivated by setting the
Clean Count
in the menu
Auto Clean Setup
to 0.
The controller has one more option for intermediate cleanings that doesn't require the extinguishing of
the fire and only increases the power of the blower. The settings for this cleaning method are in the
menu
Interm. Cleaning
. The parameters for this setting are: the interval between the cleaning
User Manual / version 2.6
http://www.naturela-bg.com/en/
page 13 of 28
