System With Puffer / Heat Accumulator; Shutting Down Procedure - Ferroli NATURFIRE EVO 27 Instrucciones De Uso, Instalación Y Mantenimiento

If there is no further demand, the boiler goes on STANDBY or to MODULATION, depending
on the settings.
If the boiler is in OFF status, it does not turn on and does not provide the service.

7.5.5. SYSTEM WITH PUFFER / HEAT ACCUMULATOR

Description
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 P1 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 boiler 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 boiler goes to AWAITING REQUEST (make
sure to set the STANDBY function to ON.
▪ If the boiler 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 80°C with minimum return
temperature not lower than (50-55)°C in order to prevent condensation inside the chamber.

7.6 SHUTTING DOWN PROCEDURE

Shut down the boiler as follows:
Step Action
Press button P4 for about 2 seconds.
Note: the auger is immediately stopped and the
fume extractor is brought to high speed, making
1
the message "FINAL CLEANING" appear on
the display.
At the end of the operation, the message "OFF"
2
will appear in the dialog box.
During the shutdown stage the boiler 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.
82
NATURFIRE EVO 27 - 34
cod.48427M013_11/19
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