18
INSTALLATION
2.7
Boiler water circuit
1
Boiler body
2
Automatic vent valve
3
Pump
4
Safety valve
5
Burner
6
Expansion tank
7
Drain cock
8
3-way diverting valve
9
Plate heat exchanger
10
Storage cylinder fill cock
A
Safety thermostat
B
Delivery temperature probe
C
Pressure transducer
D
Return temperature probe
E
DHW temperature probe
F
DCW temperature probe
MI
Central heating flow
RI
Central heating return
UAC
Domestic hot water outlet (DHW)
EAF
Domestic cold water inlet (DCW)
UAC
2
3
6
7
5
1
D
8
C
4
9
10
E
F
A
B
EAF
RI
MI
2.8
Typical system schematic
1
Disconnect valves
2
Pressure reducer
3
Water softener filter
4
Non-return valve
5
CH radiator
6
DHW user
MI
Central heating flow
RI
Central heating return
EAF
Domestic cold water inlet
UAC
Domestic hot water outlet
UAC
EAF
RI
MI
5
1
1
1
1
1
3
2
EAF
1
6
4
9
The safety valves must be connected to a suitable collection and drain system.
9
The selection and the installation of the components of the system is the responsibility of the installer, who must operate in
accordance with good practice and current Legislation.
9
If needed, water supplies and recovery circuits must be conditioned by suitable treatment systems. Refer to the values listed in
the table on page 23.
0
Never run the boiler or the pump dry.
