5
Mareli Systems
Pellets are stored in a hopper. Mareli hoppers have a 45-degree tilt. The screw conveyor pipe must be placed
therein. The Screw conveyor draws pellets from the hopper and feeds the burner through a flexible connection.
Dosing is controlled by the control unit by changing the operating time of the screw conveyor. The initial load-
ing of the screw conveyor with pellets (filling the screw conveyor pipe) is carried out when the screw conveyor
plug is connected to a normal 230V/50Hz outlet. As pellets start to fall through the flexible connection, the
plug is shifted to the burner.
Important
: For ensuring normal operation of the burner a 20 Pa chimney draught is required. After starting
the burner, wait for about 3 hours for the chimney to be warmed up and measure the draught. Install addition-
al chimney fan (controlled by the control unit of the burner) if necessary.
The heat exchange surface is made of high quality low-carbon stainless steel. Wear is extremely slow, and
cleaning is done with a soft damp cloth without any cleaners.
4. Maintenance and operation of the pellet burner
Requirements for the characteristics of the fuel, which is used for operation of a pellet burner PB 40 KW
The following table shows the requirements for the types of wood pellets utilized in automated pellet burner.
Table 1
The following table shows classification of wood pel-
lets depending on their physical parameters - accord-
ing to an evaluation methodology applied by Mareli
Systems:
Table 2
Ad - ash content in dry mass
DU - Mechanical resistance
Pellets are stored in a pellet hopper at a dry and
ventilated place.
Appendix 2
Technical data
