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The pellet boiler incorporates a circulation pump, a 16-litre expansion vessel, a 3-
bar safety valve, a filling tap and a return temperature control valve (anti-
condensation valve);
The expansion vessel is 16 litres and is pre-charged to 1 bar, this volume and
pressure is selected to protect the machine, according to the installation, you must
add, an expansion vessel to protect it;
The normal operating pressure is between 1 and 1,5 bar;
To empty the appliance, it has a key on the left side of the body, inside the
machine. This key is connected to the outlet which is on the back of the machine.
Connect a hose to the rear drain to lead the water to the nearest drain;
The outlet of the safety valve (3 bar) is led and connected, as is the drain cock to
the rear outlet;
The heat transfer fluid must be water with an anti-corrosion product added, non-
toxic and in the quantity recommended by the manufacturer; if there is a risk of
freezing in the space where the pellet boiler or fluid pipes are located, the installer
must add an anti-freeze to the circulating fluid in the proportion recommended by the
manufacturer, in order to prevent freezing at the absolute minimum expected
temperature;
It is very important that the system is balanced in relation to the power of the
boiler and dissipating elements, otherwise we recommend the installation of an inertia
tank. For this model, the required tank capacity is generally between 400 and 800
litres.
The exact formula for calculating the required inertia deposit according to the
standard, is as follows:
Vsp=15Tb x Qn (1-0,3(Qh/Qmin))
Legend:
Vsp is the volume of the storage tank, in litres.
Tb is the combustion period (autonomy), in hours.
Qn is the rated net power, in kilowatts.
Qh is the heating load, in kilowatts.
Qmin is the minimum net power, in kilowatts.
