Herz pelletstar 10, Operating Instructions Manual

Page: 10 / 96

4 Equipment funtioning
10 Betriebsanleitung_PS_10_60_Touch_Englisch_V1.3
4 EQUIPMENT
FUNTIONING
4.1 Feeder system
The fuel is transported from the fuel storeroom by
means of a feeder screw with flat spring stirrer for
burnback protection devices. It then passes
through the drop shaft and the burnback
protection device. The burnback protection device
is driven by a spring-loaded servo-motor. If the
servo-motor has no power supply then the flap
closes independently. Then the plug-in screw
feeds the fuel upwards. These are then directed to
the combustion chamber via a drop level. The fuel
level reached is crucial for the boiler capacity and
the operating condition of the equipment.
4.2 Type of feed
The operation of the pelletstar based on a pulse-
no-pulse ratio which controls the feed system. All
the values are to be set via the menu “Fuel
values” (only available in the service area). These
feed values are corrected by the combustion
control system.
4.3 Combustion air control
Differentiation is made between primary and
secondary air (1+2) in the combustion air
supplied. The primary air is supplied directly into
the embers. Using secondary air an attempt is
made to fully develop the flame arising from the
primary air. The air supply is supplied via a lateral
opening (underneath the lateral panelling).
The flue gas ventilator is a suction fan and this is
located at the back of the boiler. It generates low
pressure in the boiler. The secondary and the
primary air are sucked out by this low pressure.
The blower is time-controlled by the variable-
speed electronic control. The blower speed is
controlled according to the boiler temperature and
rectified by the lambda control.
4.4 Removing the two ash pans
Only for pelletstar 45
– 60
Open the ash pan door
You can then take out the first ash pan (at the
front)
The second ash pan is removed by using the
hook provided