Era F 30 B 60
30
Cod. 3540H511 - 12/2008 (Rev. 00)
It is advisable to install on-off valves between the boiler and heating system allowing the boiler to be
isolated from the system if necessary.
Make the boiler connection in such a way that its internal pipes are free of stress.
Fig. 3
86
50 50 50 50
88
427
850
a1
a2
a3
a4
a5
a6
Rear view
Key
a1
System return 3/4”
a2
Cold tap water inlet 1/2”
a3
Recirculation
1/2”
a4
Hot tap water outlet 1/2”
a5
System delivery 3/4”
a6
Gas inlet 3/4”
Characteristics of the water system
In the presence of water harder than 25° Fr, we recommend the use of suitably conditioned water in
order to avoid possible scaling in the boiler, caused by hard water, or corrosion produced by aggressive
water. It should be remembered that, because of its low thermal conductivity, even scaling of just a few
mm thick causes significant overheating of the boiler walls with consequent serious problems.
Water treatment is indispensable in the case of very large systems (containing large amounts of water) or
with frequent introduction of replenishing water in the system. If partial or total emptying of the system
becomes necessary under these conditions, it is advisable to refill it with treated water.
Filling boiler and system
The boiler is equipped with a ball cock (Fig. 2) to fill the heating system manually. The filling pressure
with system cold system must be about 1 bar. If, during operation, the system pressure falls (caused by
the evaporation of gas dissolved in the water) to values below the minimum described above, the user
must bring it back to the initial value by operating the filler cock. For correct operation of the boiler, when
hot, its pressure must be about 1.5-2 bar. At the end of the operation always close the filling cock.
