Ferroli BLUEHELIX TECH RRT 28 C Instrucciones De Uso, Instalación Y Mantenimiento página 161

BLUEHELIX TECH RRT 28 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 falls below minimum val-
ues, the boiler stops and fault F37 is displayed. Pull 1
out the filling knob (detail 1 - fig. 16) and turn it anti-
clockwise 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
161
EN
cod. 3541N260 - Rev. 04 - 04/2018