Ferroli Domina Oasi F 24 E Technical Manual page 14

DOMINA OASI F 24 - 30 E
FERELLA BOIL F 24 - 30 MEL
KEA AIR COMPACT E
Water pressure switch
It ensures a minimum pressure for the system. It is normally open (NO) and
closes the contact when the pressure exceeds 0.5 bar. It works on low voltage.
Safety valve
It opens if the pressure exceeds 3 bars, making boiler operation safer and
protecting it against overpressure. You are strongly recommended not to use
this valve to drain the system; once open, dirt could remain inside it, preventing
it from closing completely.
Check valve
It is necessary to ensure the water flows in one direction only and it is located
above the two pumps.
Filler cock
This is located between the heating return and the tap water outlet. It is not fitted
on the boiler for some markets such as the British and Belgian ones. For French
boilers there is a disconnector to be installed externally.
Drain cock
This is located upstream from the tap-water pump and has the function of
draining the system.
14
Version - 09.2002