Ferroli OPTIMAX 25 OV Instructions For Use, Installation And Maintenance page 12

Schematic layout for fully pumped heating and hot water.
12
Open Open
Vent
Vent
Motorised valve
22 mm
DHW
Balancing
valve
Indirect coil missing
max. 150 mm
Isolating
valve
CH Pump
Optimax 25 OV
T o DHW taps
Indirect cylinder
Isolating valve
Drain
Motorised valve
22 mm CH
Automatic By-pass
Fig. 5
Radiator Radiator