Ferroli DIVA D C24 Instructions For Use, Installation And Maintenence page 36

DIVA D C24
System water pressure adjustment
The filling pressure with system cold, read on the
boiler water gauge (detail 2 - fig. 8), must be approx
1.0 bar. If the system pressure falls below minimum
values, the boiler stops and fault F37 is displayed. Pull
2
out the filling knob (detail 1 - fig. 8) and turn it counter-
clockwise to return it to the initial value. Always close
it afterwards. 1
Once the system pressure is restored, the boiler will
activate the 300-second air venting cycle, indicated on
the display by Fh.
To prevent boiler shutdown, it is advisable to periodi-
cally check the pressure on the gauge with system
cold. In case of a pressure below 0.8 bar, it is advisa-
ble to restore it.
fig. 8- Filling knob
System draining
To drain the system, attach a rubber hose (ref. 3 -
fig. 9) to the circulating pump drain valve connection.
Using a hex wrench, open and empty the system. To
prevent the valve from becoming detached from the
circulating pump, do not unscrew it completely.
To drain only the water in the boiler, first close the
shut-off valves between the system and boiler before
turning the ring nut.
fig. 9
36 EN
cod. 3542B920 - Rev 06 - 11/2023