NINFA N LOW NOX 24 MCS
System water pressure adjustment
The filling pressure with system cold, read on the boiler water gauge, must be approx. 1.0 bar. If the system pressure
falls to values below minimum, the boiler card will activate fault F37 (fig. 15).
Operate the filling cock (detail 1 - fig. 16) and bring the system pressure to a value above 1.0 bar.
A
Once the system pressure is restored, the boiler will activate the 120-second air venting cycle indicated on the
display by FH.
At the end of the operation always close the filling cock (detail 1 - fig. 16)
EN
fig. 15 - Low system pressure fault
fig. 16 - Filling cock
cod. 3540R880 - 01/2009 (Rev. 00)
67