Page 31 from 40 6720803522 AD HP270-1 2012/03 en
Pict.27 – Storage tank connections
5.3 Hydraulic connections – cold water inlet
Ball valve in the cold water inlet
In order to avoid the installation of a simple ball valve, and separately, a non-return valve, the installer can find in
the market valves with both functions.
Source: caleffi
Pict.28 – Example of a ball-valve with non return function integrated
Filter in the cold water line
In case of water with a high content of mineral substances or other types of dirtiness, it is recommended to use an
appropriate filter - consult a specialist.
Source: caleffi
Pict.29 – Example of a line filter
1
2
3
4
1 – Cold Water Inlet (
1”
)
2 – Coil connections for external use (
1”
)
3 – Recirculation connection (
3/4”
)
4 – Hot Water Outlet (
1”
)
5 – Heating element
5
