5
2.
GENERAL DESCRIPTION
2.1 OPERATING PRINCIPLE
The STQ14-ST18-STQ18-STC18 and MT28-MTQ28-MTC28 stoves have been especially designed to
satisfy requirements for a practical heating appliance. They have a fan to circulate the heat
produced by the burning pellets and are designed for clean, extremely efficient combustion.
Nevertheless, there is a range of pellets on the market and the different qualities may affect
combustion and produce larger quantities of ash.
Besides the notice "WAIT" allows to reduce the consumption of pellet because the stove switches off
itself when the temperature environment overcomes of 2 degrees the temperature setting and
automatically the stove switches on again itself when the temperature environment goes down of 1
degree respect the setting one.
P.S. During the notice "WAIT" it is possible to switch OFF the stove pressing the OFF key
2.2 PELLETS AND QUALITIES AVAILABLE ON THE MARKET
Pellets are a by-product of wood "dust”. The resulting sawdust is pressed to form cylinders with a
diameter of 6 mm and a maximum length of 30 mm. They have a maximum moisture content of
10% and a thermal value of 4.9 kW/kg. The best pellets on the market are a blend of beech and
pine dust.
Standards DIN 51731 and ÖNORM M 7135 define pellet quality:
Length:
approx. 10 - 30 mm
Diameter:
approx. 6 mm
Actual weight:
approx. 650 kg/m³
Thermal value:
approx. 4.9 kW/Kg
Residual moisture: approx. 6 – 12%
Ash:
< 1.5%
Specific weight:
> 1.0 kg/dm³
It is also possible to make a visible assessment of pellet quality:
Good quality: shiny, smooth, constant length, very little dust.
Bad quality: horizontal and cross-wise cracks, a lot of dust, varying length.
A simple test for finding a good pellet is to measure its specific weight by putting a few grains into a
glassful of water:
Good quality: the pellet immediately falls to the bottom
Poor quality: the pellet floats
Using other material than that described above as fuel will have an adverse affect on stove
operation and will invalidate the guarantee.
2.3 THE PELLET TANK
The tank holding the reserve of pellets is at the top of the stove. To get at the tank it is necessary
to open the lid on the top. The maximum capacity of the tank depends on the model:
STQ14
- approx. 10 kg
ST18-STQ18-STC18 - approx. 15 kg
MT24-MTQ24-MTC28 - approx. 30 kg
Summary of Contents for MT28
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