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3.3 Combustion chamber overpressure safety
Any and/or sudden overpressures in the combustion fumes inside the chamber and fume exhaust ducts are
discharged by opening of the safety valves located on the heat exchanger. During normal operation these valves
are kept closed by their weight and the negative pressure in the combustion chamber, guaranteeing a seal against
any smoke escaping.
Periodically check closing, the integrity of the device and its operation.
3.4 Overheating - pellet hopper temperature safety thermostat
3.5 Safety against flare-back in the pellet chute
The solutions preventing flare-back are:
►
negative pressure in the combustion chamber see par. 3.2.
►
the siphon shape of the pellet chute.
►
the hopper temperature safety see par. 3.4.
3.6 Overcurrent protection device
The unit is protected against overcurrent by 2A fuses on the power supply of the main stove switch located at the
back.
3.7 Power failure safety
In case of brief power failures, the stove relights automatically.
A temporary power failure does not limit stove safety and the hopper temperature does not reach high values
(< 85°C), given the small quantity of pellets burning in the brazier.
This anomaly can result in some smoke briefly escaping into the room, which does not involve any risk.
Do not tamper with the safety devices.
3.8 Fume extractor fan failure
If the fume extractor fan stops for any reason, the electronic controller instantly stops the pellet feed, displaying the
message 'AL 4 FAN FAIL'.
4 STOVE USE
4.1 Introduction
The pellet stove has the advantage of combining heat from a wood flame with the convenience of automatic
management of temperature and the possibility of weekly programming of lighting and shutdown.
Connection to an external thermostat and/or chronothermostat is possible for detecting the temperature in a
different place from where the stove is installed.
For safe and reliable use:
-
when lighting and using the stove the first time, unpleasant odours may be created, therefore air the room
thoroughly;
-
the hopper must only be filled with pellets; make sure the bag does not come into contact with the hot surfaces
of the stove;
-
do not put any fuel other than the prescribed pellets in the hopper;
-
the stove must not be used as a waste incinerator;
-
the stove must only operate with the fire door always closed.
-
the fire door seals must be checked periodically to prevent air from entering;
-
to guarantee efficient performance and correct operation it is necessary to carry out periodical cleaning of the
brazier every time pellets are loaded;
-
when lighting the stove for the first time, allow it to heat up gradually by setting low operating temperatures (see
section on temperature setting);
-
during lighting, operation and shutdown, the stove may creak a little due to the heat expansion.
A temperature probe is connected to a safety thermostat above the pellet chute
which automatically interrupts the pellet supply in case of excessive heating >
85°C. In this case the extractor and/or fans continue working, allowing the stove to
cool down rapidly. The fault is displayed on the control panel with a message 'AL 7
THERMAL SAF'. In case of activation, proceed as follows:
Allow the stove to cool down for at least 45 minutes.
Reset the thermostat by pressing the button near the switch on the back of the
stove, after unscrewing the protection cap
(figure opposite).
Restart the stove normally.
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VIOLA 2014
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