Ferroli AT 18 Manuel D'installation, D'utilisation Et D'entretien page 49

4.4.4 System with puffer / heat storage
This type of installation requires the use of an external thermostat or a water probe, which measures the puffer water
temperature.
In the former case, temperature SETTING is obtained by adjusting the puffer thermostat controller.
In the latter case, to modify the temperature it is necessary to press button P2 on the control panel and then increase
or decrease the temperature value with buttons P1 and P2.
When the temperature drops below the SET external thermostat temperature:
If the stove is in the AWAITING REQUEST stage, it automatically turns on and goes to WORK status and the supply
of water to the puffer is activated when the work temperature of the heating chamber water is reached.When the
puffer SET temperature is met, the stove goes to AWAITING REQUEST (make sure to set the STANDBY function to
ON, see par. 4.6.2 ).
If the stove is in OFF status, it does not turn on and does not provide the service.
It is possible to choose the temperature SETTING of the DHW storage tank and of heating from a min. of 54°C (STD
pump start value) to a max. of 70°C with minimum return temperature not lower than (50-55)°C in order to prevent
condensation inside the chamber.
4.5 Shutting down
To shut down the stove, just press the button 'P4' for about 2 seconds.
The auger is immediately stopped and the fume extractor is brought to high speed, making the message 'FINAL
CLEANING' appear on the display.
Clock
Room temperature
Button 'P4'
Dialogue box
At the end of the operation the message 'OFF' appears in the dialogue box.
During the shutdown stage the stove cannot be restarted until the fume
temperature has fallen below a set value for a fixed time, with the message
'WAITING COOL' appearing in the dialogue box.
At the end of the operation, the message 'OFF' will appear in the dialog
box.
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