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Irreversible liquid crystal thermo sticker
is indicator for at least one event of
overheating the pellet supply pipe of the main body of the burner. This sticker changes
its color irreversibly. Initially the color of this sticker is
white
, at activation the
sensing segment gets dark irreversibly;
In case the fuel transport auger should be supported, then an option should
be utilized – a telescopic support, which could support the weight of the
auger and the length could be adjusted in order to achieve the required
installation angle and the overall stability of the auger.
Figure 3.5.
Side view of the auger support telescopic element – option of
the kit of the pellet burner of series “GP”;
3.2.
Specific design measures in order to increase the safety
operation of the burner
The ignition and the combustion process is monitored by microprocessor control
board;
The ignition process is monitored and in case that the fuel is not ignited for some
reason, after certain number of ignition trials, the operation of the burner is stopped
and alarm mode is indicated;
In case that fuel is consumed from the hopper, than after the defined number of
ignition trials the burner will go out in
stop
mode and alarm is indicated as well;
The flexible hose, which connects the fuel transport auger with the main unit, is
transparent and is made of specific heat resistant material;
Information stickers are applied, indicating certain precautions measures and correct
operation of the unit;
The burner is equipped with safety elements, which are involved in „back fire”
protection system:
o
Free falling duct, which practically interrupts the fuel flow between the
transport auger and the main module. This duct is approximately 250mm long.
Beside that, the fuel auger is connected to the main unit by a flexible hose,
which does not contain fuel. The grate of the burner is however charged with
controlled amount of fuel, which is utilized at the combustion process and
possibility of back fire is strongly reduced;
o
Sensor of “back fire” alarm thermo-probe, which is positioned on the fuel
delivery pipe of the main unit, activates at surface temperature levels above 90
– 95
o
C. In case of alarm thermo-probe activation, the main unit and the fuel
transport auger are stopped and switched to alarm mode. This mode is
indicated by appropriate message, shown on the display - „STOCKER
FAULT”.
The alarm mode is not automatically deactivated and needs manual
