12
for the technician
Installation instructions
627
BOILER BOTTOM VIEW
1
2
System filling
Once the boiler is hydraulically connected, it is
possible to fill the system.
Warning: if boiler is installed in a room where
temperature can drop below 0°C, it is
recommended to fill the heating system with
an anti freezing mixture.
While filling, please follow carefully the following
phases:
— Open air vent in radiators;
— open filling tap;
— slowly unscrew screw [2] located in water filling
electro-valve, from position “C” to position “A” (see
picture), taking care of all air vent installed in the
system;
— as soon as water flows out of air vent radiators,
close air vents;
— check on the manometer [1] that pressure reaches
the optimal value of 1÷1.5 bar (minimum: 0.5 bar),
then reset screw [2] in position “C” (closed);
— repeat previous operations until all air in the system has been blown out.
Note: Boiler is equipped with a special automatic filling device, which automatically fills boiler to
reset its pressure provided that boiler is electrically fed.
