Ravelli Vittoria V, Use And Maintenance Manual

Page: 7 / 36

Use and maintenance manual for stoves with touch remote
Pag.7
Rev.0 05/12/2022
What are the wood pellets
The wood pellets are made from sawdust and wood shavings produced in joiners’ shops. The material used cannot contain any
foreign substance such as glue, varnish or synthetic substances.
Subjecting it to high pressure, the wood is pressed through a plate with holes and due to the high pressure the sawdust is heated
activating the natural binders of the wood. Thus, the pellets keep their shape even without the addition of bonding substances. The
density of the wood pellet varies according to the type of wood and can be 1.5 – twice greater than that of natural wood.
The diameter of the cylindrical rods is 6 mm and their length can vary between 10 and 40 mm.
Their real weight is greather than 650 kg/m
3
. Due to the low content of water (<10%) they have a high energy content.
The standards ISO 17225-2:2014 define the quality of the pellets:
The pellets must be transported and stored in a dry place. They swell on contact with damp, and cannot be used, They must
always be protected from the damp both during transport and in storage. Do not place such fuel within the space heater installation
clearances or within the space required for charging and ash removal.
The components of the stove
1) pellet loading auger
2) electrical igniter
3) combustion fire pot
4) tube for passage of smoke
5) air intake tube
6) stainless steel heat exchanger
7) pellet hopper
8) baffle
9) smoke exhaust tube
This drawing shows the internal parts of a pellet stove.
By filling the hopper (7), the pellets are loaded into the fire pot (3)
through the loading auger (1).
Ignition is by means of the electrical igniter (2), which overheats
the air from the special entrance (5) which on contact with the
pellets will allow the development of the flame. At this point the
exhaust smoke is deviated towards the stainless steel exchanger
(6) and through the smoke extraction tube (4) it is released into
the flue, through the connection with the smoke exhaust pipe. (9).
Length: < 40 mm
Diameter: 6 mm approx.
Real weight: > 600 kg/m3
Lower heating value: ≥ 16,5 MJ/kg (≥ 7100 BTU/lb)
Residual humidity: < 10 %
Ashes: < 1.2 %
Specific weight: >1000 kg/m3
Do not put the bag of pellets on the
ceramic parts during the loading
operations.
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2
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1
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4
9