Biopel MINI - Installation and Operation Instructions
40
Flame is too big and smokes black
10.3.
Change external feeder operating time
If the correction of the combustion process by means of the fan is not enough, you can proceed to the correction of the
operation feeder time, i.e., to the adjust the fuel quantity. Keep in mind that this correction directly affects the maximum
and minimum boiler power. The correction can be made using the Max. and Min. Feeder Coefficient in the Installation
menu, Coefficients.
Downward correction (minus values):
The grate is excessively clogged with black ash
Flame is too big and smokes black
Flue gas temperature is higher than recommended
Upward correction (plus values):
Boiler is unable to adequately heat the CH temperature
Flame is too small and too aggressive
Flue gas temperature is lower than recommended
After each correction, let the flame settle for a few minutes and check the change in the flame after your correction. If you are
not satisfied, perform the correction again. Keep in mind that the boiler power must be stable at the Max or Min value to
adequately adjust the Min and Max corrections and see the real result on the flame. Otherwise, the flame will be affected by
the PID modulation and will not match the min or max power value.
In the case of a non-standard installation with a different external feeder than prescribed, a different chimney draft than
prescribed, etc., we recommend that you measure the external feeder power before starting the boiler, see the Combustion
Correction, Non-Standard Installations section.
10.4.
Non-standard installations
If the boiler configuration is non-standard, i.e., basic instructions are not followed during installation such as:
External feeder type (feeder speed) for adequate boiler type. Each boiler has an unmistakable External Feeder type
with the correct motor speed.
45° angle of the External Feeder from the ground
Chimney draft 15Pa
Size and type of pellets
We then recommend that you measure the External Feeder power before starting the boiler. This will determine if your feeder
is feeding an adequate amount of pellets for the boiler's maximum power in case of your particular installation configuration.
The procedure for determining the External Feeder power is as follows:
1.
With the boiler in the deactivated state (Off), disconnect the PVC hose from the Burner Pipe and, on the other top
side, from the External Feeder outlet.
2.
Attach a plastic bag to the outlet of the External Feeder into which the pellets will fall.
3.
Start the External Feeder in the Installation Menu, Manual Operation, Feeder. And leave it running for 5 minutes.
4.
After this time, the bag will be filled with pellets that the External Feeder is able to deliver to the burner in 5
minutes.
5.
Weigh the bag of pellets on a carry-on scale. The value in grams you get is determined by the speed of the External
Feeder, its inclination from the ground (45°C recommended), pellet size (6-8mm), amount of dust in pellets, etc.
6.
Enter this weighted number, into the Feeder Calibration - Pellet Quantity function, in the Installation Menu.
Bear in mind that we recommend calculating the External Feeder power only in the case of a non-standard installation.
If using the standard recommendations for feeder installation, pellet type and chimney draft, you can skip this sub-chapter and
correct the flame when the boiler is operating using the points explained in the Change Fan Speed and Change External Feeder
Operating chapters, found one the page above.
Caution: if you perform a feeder correction, you will change the amount of pellets dosed by the
feeder for max. and min. power. Therefore, it is therefore necessary to check the combustion
quality and then adjust the fan speed in the Coefficients function so that combustion at the new
amount of pellets is ideal, without smoke.
