Megatherm wood-pellet burner
MPB 90 Pro
2.
The principle of working
The principle of work of MPB 90 Pro burner is based on providing fuel via steering the
feeders appropriately and the work of a fan which steers the burning process. The MPB Pro
burners are supplied with 2 feeders:
The 1
st
feeder (
external feeder
), which supplies wood pellet from the storage tank to the
burner
The 2nd feeder (
internal feeder
) which drives the wood pellet to the burner's fire
chamber. The operation of the internal feeder is depended on the external feeder's
operation time. The parameter “FEEDER MULTIPLIER” is used to set the operation time of
the internal feeder regarding the operation of the external feeder.
MPB Pro burners have 3 ways of operating:
Single mode
: The burner reaches the desired “HEATING WATER TEMPERATURE “(i.e 65
o
C)
and burns off. Then, it starts its operation again when the temperature of the boiler goes
down to the temperature “HEATING WATER TEMPERATURE - CH FURNACE HYSTERESIS”
(i.e 65
o
C-10
o
C=55
o
C) . The “CH FURNACE HYSTERESIS” must be more than 10
o
C
Continuous mode
: The burner reaches the desired “HEATING WATER TEMPERATURE “ and
goes down at 3kW (maintain).When the boiler's temperature goes down to the temperature
“HEATING WATER TEMPERATURE - CH FURNACE HYSTERESIS” (i.e65
o
C-3
o
C=62
o
C) , the
burner increases its power from 3kW (maintain) to the maximum burner power (i.e30kW).
The “CH FURNACE HYSTERESIS” must be no more than 5
o
C
Analogue mode
: The burner reduces its power 1/3 (for example: from 150kW to 100kW)
10
o
C before the furnace reaches the “HEATING WATER TEMPERATURE “. When the
temperature of the furnace is 5
o
C before “HEATING WATER TEMPERATURE “, the burner
reduces its power again 1/3 (for example: from 100kW to 50kW).
It is also possible to stipulate the working mode of the WUW pump with a priority or
without it. The driver enables the control of the furnace's work thanks to the room
thermostat. It is possible to steer the heating in relation to the actual temperature in the
room. The regulator is also equipped with the self-control systems (detecting the
malfunction of the temperature's sensors) and mechanisms monitoring the furnace's work
preventing from going beyond the range of safety for the installation of the central heating.
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