3.3.Feeding screw
The outer feeding screw provides the necessary fuel supply to the burner. The
one end inserted into the fuel tank (silo), while in the other there is the motor of
the screw, and the nozzle for the drop of pellet into the burner via a plastic
connection hose. The hose is made of a fusible plastic that melts for safety in
temperature of 100oC.
The hose must be sufficiently taut and have sufficient slope to permit free flow of
pellets and not block the fuel. The connection must be tight and clamped via the
provided clamps, for protection against return exhaust gases.
3.4.Silo
The silo is used to the store the pellet. The silo is placed above the boiler. It has
inner inclined sides to permit the free fall of fuel supply to the feeding screw
without leaving residues. It has a slide cover, window for fuel level inspection and
flange with neck stabilization of the screw. When filling the tank avoid entering
into the silo foreign objects such as stones, pieces of wood, plastic or metal
materials, etc., which can cause damage to the feeding screw.
4. FUELS
4.1. General
Pellet Compact Bio-Unit boilers are designed for pellet, with high efficiency,
reliability and easy maintenance. Additionally, it is a boiler that can work perfectly
with heating oil or gas burner as well. In case of burner changed it is may needed
an extra flange for the connection with the boiler.
4.2.Pellet
The pellet burner can operate only with high quality wood pellet. Any other fuel
can cause problem to the burner.
The pellet is 100% natural product and renewable energy source. It is
constructed by forest residues, woods, etc. The wood pellet is produced
exclusively from wood, without other additives and chemicals.
4.3.Oil and gas
The boiler can be operated with oil or gas with very good performance, with a
simple change of the burner.
Fuel switching may require special flange to fit the new burner to the boiler door.
The company is not responsible for the commission of the flange.
The burner is not part of the boiler, and is not covered by the regulations of this
manual neither the warranty of the boiler. If mounted oil burner should be
installed in accordance with applicable regulations and be accompanied for the
proper and safe use.
