Ferroli DIVATOP D HF Instructions For Use, Installation & Maintenance page 56

System water pressure adjustment
The filling pressure with system cold, read on the
boiler water gauge (detail 2 - fig. 24), must be approx
1.0 bar. If the system pressure falls below minimum
values, the boiler stops and fault F37 is displayed. Use
the filling cock (detail 1 - fig. 24) to fill the system and
restore the initial pressure value. Always close it af-
terwards.
Once the system pressure is restored, the boiler will
activate the 200-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.
Display
bar
F37
System draining
To drain the system, attach a rubber hose (ref. 3 -
fig. 25) 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 system and boiler before
turning the ring nut.
56
Description
Optimum pressure
Low pressure
Low pressure
cod. 3540000180 - Rev. 00 - 05/2023
DIVATOP D HF
1
fig. 24- Filler cock
Operation
Normal operation
The boiler stops.
After a few seconds the symbol "F37" appears.
The boiler is waiting for system filling
fig. 25
2
3
EN