Ferroli BlueHelix ALPHA C Instrucciones De Uso, Instalación Y Mantenimiento página 246

System water pressure adjustment
The filling pressure with system cold, read
on the boiler water gauge (detail 2 - fig. 15),
must be approx 1.0 bar. If the system pres-
sure falls below minimum values, the boiler
stops and fault F37 is displayed. Turn the fill-
ing knob (detail 1 - fig. 15) and turn it coun-
ter-clockwise to restore the pressure to the
initial value. Always close it afterwards.
Once the system pressure is restored, the
boiler will activate the 300-second air vent-
ing cycle, indicated on the display by Fh.
To prevent boiler shutdown, it is advisable to
periodically check the pressure on the
gauge with system cold. In case of pressure
below 0.8 bar, it is advisable to restore it.
System draining
To drain the system, attach a rubber hose
(ref. 3 - fig. 16) 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 sys-
tem and boiler before turning the ring nut.
Information regarding the circulating pump
the circulating pump has a central button
(ref. 1 - fig. 17) for selecting the operating
head. If the circulating pump is controlled by
a modulating signal (as in this BlueHelix AL-
PHA C model), the button is disabled and
head adjustment is automatically controlled
by the PCB.
There are some LEDs (ref. 2 - fig. 17) which
indicate the circulating pump operating
mode. Otherwise, in case of a fault, these
LEDs provide diagnostics of the possible
cause, based on the number of flashes.
246
cod. 3540000021 - Rev. 00 - 02/2024
BlueHelix ALPHA C
1
fig. 15- Filling knob
3
fig. 16
2
fig. 17
2
1
EN