HDG M299, Operation Manual

Page: 21 / 176

©
HDG Bavaria GmbH 07/2008 HDG M299/300/350/400 - Version 1 - en
3 Mode of operation – Functional description
21
Following the heating-up phase, the system switches to automatic
operation. In this mode, combustion is carried out according to the
entered control options.
In order to free the grate from ash which collects during combustion,
every second segment of the grate moves back and forth
periodically. The automatic cleaning system cleans the heat
exchanger surfaces using the turbulators which move up and down.
The grate ash and fly ash 1 are conveyed toward the central ash
removal system by the automatic ash removal system using ash
removal augers in the transfer station. From there an ascending
auger conveys the ash into an optional 240 l ash bin. Fly ash 2 and 3
are propelled into the external ash containers by the ash removal
augers of the automatic ash removal system.
The air necessary for combustion is supplied as required via two
combustion air fans.
Sensors are used in the following:
– To continuously monitor the firing
– To adapt boiler output for the heat requirements
– To minimise emissions
– To optimise boiler efficiency
D
ELIVERY SYSTEM
The delivery system is in the fuel storage room.
The fuel is transported from the fuel storage room to the dosing unit.
The delivery system is controlled through the HDG Control.
HDG C
ONTROL
The HDG Control boiler controller in the control cabinet represents
the electronic hub. This is a freely programmable PLC control.
Using the control unit, you can adjust the HDG M299/300/350/400
heating system and obtain information on the current process status.
The current operating status is displayed.
Figure 3/5 - HDG Control control unit
$POmH
.POJUPS
J