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Layout 3: circuit with boiler connected to heating system via separator
Components NOT managed
directly by the boiler
Layout 4: circuit with boiler connected to DHW tank and heating system via separator
Components NOT managed
directly by the boiler
UAC
5
4
6
1 10 9 1
EAF
1
1
Disconnector valve
2
Non-return valve
3
Anti-burn mixer valve
4
Expansion vessel
5
Safety valve
6
Discharge
7
Pressure gauge
8
Minimum pressure switch
9
Softener filter
10
Pressure reducer
11
Storage tank
13
Boiler circulator
14
Storage tank circulator
Direct zone circulator (*managed by boiler with
15
specific accessory)
Mixed zone circulator (*managed by boiler with
16
specific accessory)
Mixing valve (*managed by boiler with specific
17
accessory)
SE
Outdoor temperature sensor
MI
High-temperature system delivery
RI
High-temperature system return
EAF
Cold water inlet
UAC
DHW outlet
15*
MI
1
2
1
RI
1
1
5
3
6
11
7
2
1
6
SE
13
5
6
7
8
4
1
10 9 1
14
15*
16*
17*
1
9
The domestic hot water and central heating circuits
must be completed with expansion vessels of ade-
quate capacity and suitable, correctly-sized safety
valves. The discharge of the safety valves and ap-
pliances must be connected to a suitable collection
and disposal system (see the price list catalogue for
compatible accessories).
9
The selection and installation of the system com-
ponents is the responsibility of the installer, who
must respect the standards of good practice and
current legislation.
9
Special supply/make-up water must be conditioned
using suitable treatment systems.
a
It is forbidden to operate the boiler and circulators
without water.
25
INSTALLATION
EAF
SE
13
5
6
7
8
4
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