3 Mode of operation – Functional description
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8 Ash container
9 Combustion grate drive motor
10 Ignition element
11 Ash compartment
12 Ash removal / cleaning system drive motor
13 Primary air pin
14 Burner pot
15 Drop chute
16 Heat exchanger surfaces incl. turbulators
17 Combustion chamber temperature sensor
18 Control unit HDG Control Touch
3.2 Functional description
C
OMBUSTION
PROCESS
In boiler HDG K10 - 33, the pellets are automatically transported from
the fuel storage room to the reservoir using the delivery system with
the assistance of the pellet suction system. The feeding system
conveys the pellets to the burner pot of the boiler.
The automatic pellet suction system does not need to be fitted. In
this case the reservoir will be filled manually.
The combustion process starts with a preliminary flushing. The flue
gas fan and the combustion chamber of the boiler is flushed with
fresh air. The next step is the ignition phase. The supplied pellets are
automatically ignited with a heating element. In the subsequent
flame stabilisation phase, even combustion is established.
The system then changes to modulation mode. In this mode,
combustion is carried out according to the required output.
The boiler HDG K10 - 33 is equipped as standard with an automatic
heat exchanger cleaning system. This ensures a consistently high
heat transfer and consequently a high level of efficiency.
If the extracted power falls below the minimum nominal thermal
power or there is no heating request, the boiler goes into burn-out
mode. The flue gas fan continues running until the burner pot has
cooled down.
To prevent the grating from slagging up and to ensure ash removal
occurs, the grate plate is moved at intervals. The automatic ash
removal system transports the accumulated fly and combustion ash
to the external ash container.
The air necessary for combustion is supplied as required via a speed-
controlled flue gas fan.
Sensors are used to:
– Continuously monitor the firing
