Ariston microSYSTEM 21 RFFI Manuale d'uso - Pagina 14

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the correct level the boiler will ignite

automatically. If there are frequent drops in

pressure within the system, have a plumber

check the heating system for possible water

leaks.

T emporary shutdown due to

defective discharge of exhaust

fumes

The boiler is fitted with safety devices,

which in the event of a defective discharge

of exhaust fumes, automatically interrupts

the gas supply, thereby shutting off the

boiler.

The shut-off of the boiler is temporary for a

period of about 15 minutes.

Once this time period has passed and the

discharge state of exhaust fumes has

returned to normal, the boiler automatically

turns back on.

Important!

If this situation occurs frequently, contact an

Authorised Service Centre. so that they

may check that the exhaust fumes are

being expelled correctly and that the area

is ventilated properly.

Frost protection

The boiler is fitted with a thermostat which,

in the event that the water temperature

goes below 6° C, the burner turns on at

minimum power until the water in the boiler

has reached a temperature of about 20° C.

This device is only activated when the

boiler is operating perfectly and: