Ferroli BLUEHELIX TECH RRT 34 C Instrucciones De Uso, Instalación Y Mantenimiento página 158

BLUEHELIX TECH RRT 34 C
System water pressure adjustment
The filling pressure read on the boiler water gauge
A
B
(detail 2 - fig. 16) with system cold must be approx 1.0
bar. If the system pressure drops to values below min-
imum, the boiler stops and the display shows fault 1
F37. Pull out the filling knob (detail 1 - fig. 16) and turn
it anticlockwise to return it to the initial value. Always
close it afterwards.
Once the system pressure is restored, the boiler will
1
2
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
fig. 16- Filling knob
cold. In case of a pressure below 0.8 bar, it is advisa-
ble to restore it.
System draining
The drain faucet ring nut is located under the safety
valve inside the boiler.
To drain the system, turn the ring (ref. 1 - fig. 17) coun-
ter-clockwise to open the faucet. Do not use any tools;
use hands only.
To drain only the water in the boiler, first close the
shut-off valves between the system and boiler before
1
turning the ring.
fig. 17- Safety valve with drain faucet
158 EN
cod. 3541N270 - Rev. 02 - 11/2017