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EASY TECH D F
System water pressure adjustment
The filling pressure with system cold, read on the boil-
er water gauge (detail 2 - fig. 8), must be approx 1.0
bar. If the system pressure falls below minimum val-
ues, 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 drain only the water in the boiler, first close the
shut-off valves between the system and boiler before
turning the ring nut.
3
fig. 9- Safety valve with drain faucet
46
EN
cod. 3542B960 - Rev. 01 - 04/2023
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