Biopel MINI - Installation and Operation Instructions
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1.2.2 Maximum power
Setting the operation, pause the external feeder and fan speed for minimum boiler
power. Ensure that the flame is large enough for efficient combustion with fine ash. At
the same time, check the flue gas temperature, which should be within the limits given
by the boiler size. Read the manual for the correct flue gas temperature. If it is too high
at max. boiler power, perform a combustion correction.
The flue gas temperature is displayed on the main panel next to the icon
1.2.2.1 Max. feeder
operation
Feeder operation during maximum boiler output. Depends on boiler size.
1-8s
1.2.2.2 Min. feeder pause
Feeder operation pause during max. boiler output. Depends on boiler size.
7-25s
1.2.2.3 Max. fan speed
Operation
Fan rotation speed during maximum boiler output. Depends on boiler size.
10-70%
1.2.3 Cleaning time
Forced shutdown of the boiler and cleaning by means of the Extinction Phase. The boiler
is switched off after a time interval and the Extinction Phase is run to clean the grate.
Subsequently, automatic re-ignition occurs. We recommend to use only for high burner
powers, 100-200kW. We recommend setting 20h. Factory setting is 0h 0min which
means that this function is deactivated.
0-20h
1.2.4 Operation check
How often the photosensor detects light. If the photosensor does not detect a flame for
a set time period during PID operation, it will automatically go into the Ignition phase.
The recommended setting is from 20-50s. For larger burners this time may be longer.
20-50s
1.3 Extinction parameters
Extinction phase and operation of the feeders and fans in this operating condition. Varies
according to burner size.
1.3.1 Fan speed
Fan speed during the first part of the extinction phase - when the flame is still detected in
the boiler by the photosensor. At this point, we want to burn the remaining pellets
before the second cleaning phase and cooling occurs. The recommended setting is 50-
80%. This is because we want to burn the pellets quickly, but we do not want the fan
speed to be too high, which would cause unburned pellets to fall into the ashtray.
50-80%
1.3.2 Feeding time
Operation of the internal feeder in the burner during the extinction phase. The feeder
feeds the remaining pellets to the grate. Connected to the Feeding Pause function.
5s
1.3.3 Feeding pause
Pause during the internal burner feeder operation. Connected to the Feeding Time
function.
10-100s
1.3.4 Extinction time
Maximum extinction time at the time the photosensor detects the flame. If no extinction
occurs and the photosensor still detects flame for the set time, then the boiler goes into
the ignition mode and subsequent extinction. This is a safety measure to prevent the
boiler from shutting down if there is still a flame in the boiler.
5-10min
1.3.5 Delay time
Second phase of the extinction cycle when the remaining pellets on the grate have burnt
out and the photosensor no longer detects light. At this point, the fan speed is increased
to 100%. The aim is to clean and cool the grate so that it does not twist. The
recommended value is 5- 15min depending on burner size.
5-15min
2. Max. flue gas
temperature
If there is an increase in flue gas outlet temperature approaching the set point, the boiler
power will be reduced to prevent exceeding the maximum flue gas temperature.
The flue gas temperature is displayed on the main panel next to the icon
220°C
3. Feeder alarm
temperature
Maximum temperature of the internal feeder in the burner. If it is too high, an error
message will occur. Ensure that the burner/boiler/flue gas outlet and chimney are
cleaned properly. Ensure correct grate position and correct combustion settings.
Otherwise, it may result in overheating of the burner.
85°C
4. Temperature priorities
62°C
5. CH pump emergency
activation
Activation of the CH pump during an alarm message. The pump will circulate the pre-
heated water in the boiler until the CH temperature falls below the set limit.
85°C
6. Pump switch-on
temperature
The boiler CH temperature at which the pumps will switch on. If the temperature is lower
than the set limit, the pumps are inactive. This is to protect the boiler against low
temperature corrosion.
40°C
