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INSTALLATION
2.7
Boiler water circuit
MI
RI
1
9
UAC
RL
EAF
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
Storage cylinder
10 Storage cylinder fill cock
A
Safety thermostat
B
Delivery temperature probe
C
Pressure transducer
D
Return temperature probe
E
Boiler sensor
MI Central heating flow
RI Central heating return
UAC Domestic hot water outlet
RL Domestic recirculation (preset)
EAF Domestic cold water inlet
2
A
B
3
8
C
D
4
6
5
7
6
10
E
7
4
2.8 Typical system schematic
Typical installation schematic
MI
RI
UAC
RL
EAF
8
1
Disconnect valves
2
CH radiator
3
DHW circulation pump
4
Non-return valve
5
Pressure reducer
6
Water softener filter
7
Safety valve drain
8
Central heating circuit and storage cylinder drains
9
DHW user
MI Central heating flow
RI Central heating return
UAC Domestic hot water outlet
RL Domestic recirculation (preset)
EAF Domestic cold water inlet
9
Do not use a check valve in the hydraulic connections to the
heating system consumption points.
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 op-
erate in accordance with good practice and current Legis-
lation.
9
If needed, water supplies and recovery circuits must be
conditioned by suitable treatment systems. Refer to the val-
ues listed in the table on page 23.
0
It is prohibited to operate the circulators without water.
18
1
2
1
9
1
3
1
4
1
5
6
1
EAF
7
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