ARCA GRA115RO, Установка - Использование - Обслуживание

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Ignition time may vary due to the different types of pellets available on the market (the maximum duration
allowed for each attempt is set at 10 minutes).
6.3. Flame stabilisation
Once the flame has ignited the flame stabilisation
stage begins (fixed duration 3 minutes) and the top
display shows “STB”.
In this stage the heater is off, the fan operates at maximum speed and the screw motor starts running to load
pellets into the burner, based on the parameters set on the electronic board.
6.4. Normal operation
Once the stabilisation stage has ended normal
operation begins and the top display shows “ NOR “,
indicating normal boiler output; in this stage the fan
operates at maximum speed.
6.5. Boiler temperature setting
To set the boiler operating temperature use buttons
5 and 6. The bottom display will show the set
temperature.
WARNING: the operating temperature setting must
be within a minimum and maximum value, i.e.
cannot be below 65°C nor exceed 80°C.
6.6. Modulation
On reaching the set temperature and more precisely
5°C below the operating temperature, the top display
will show the text “ MOD “ indicating modulating
operation; in this stage the fan operates at minimum
speed. This message may also be shown when the
boiler starts modulating operation due to excessive
flue gas temperature (maximum setting 190°C).
6.7. Maintenance
Once time the set temperature has been reached the
top display will show “ MAN “, indicating the
temperature maintenance stage; in this stage the
boiler starts the cycle to extinguish the flame by
stopping the screw motor. Once the flue gas
temperature falls below 120°C and flame brightness
falls below the value 15 the fan starts a post-
ventilation cycle lasting 2 minutes and then stops.
When the temperature falls 5°C below the set value
the boiler will start again, repeating the ignition cycle.