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2.
Operation
2.3 Pellet boiler: functional description, function elements,
and operating controls
The pellet boiler and the Modular Energy System MES combine to form a perfect unit. The pellet boiler auto-
matically ignites when the control system signals a heating requirement. Following “purging” (safety function),
ignition starts and the pellet metering auger turns on. The burner pot is automatically filled with pellets. When
flame formation has been detected (by the thermocontrol sensor), the boiler enters flame stabilisation mode
and then control mode (modulation mode) and keeps to the specified boiler temperature setpoint. The boiler
enters burnout mode if the heat consumed drops below the minimum nominal thermal output or no heating
requirement is signalled by the control system. The blower continues to run until the burner pot has cooled
down.
2.3.1 Pellet boiler with manual pellet feed
The integral fuel hopper is loaded by hand. The heating surfaces are cleaned manually using the cleaning lever.
The cleaning residues from the heating surfaces and the combustion residues from the burner pot drop into the
ash pan. In the event of a cleaning request, the ash must be removed by hand.