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5 Hydraulic connections
5.1 Important recommendations on connecting the heating circuit to the boiler and the
drinking water system
Installation must be carried out in accordance with the prevailing
regulations, the codes of practice and the recommendations in these
instructions.
The expansion vessel must be connected directly to the boiler
without valves or stop valves.
Likewise, the safety valve must be connected directly to the boiler
without valves or stop valves.
13
1.
Heating flow
2.
Heating return
3.
3 bar safety valve + manometer
5.
Flow switch
6.
Air separator
7.
Automatic air vent
9.
Isolating valve
10.
3-way mixing valve
11.
Boiler pump
12.
Sludge decanting pot (particularly recommended on older
installations)
13.
Flush valve
14.
Water low safety pressure-sensitive switch
15.
Shunt pump
16.
Expansion vessel
17.
Drain cock
18.
Heating circuit filling (with disconnector depending on prevailing
regulations)
19.
Water treatment if TH > 25°
20.
Water meter
26.
DHW load pump
27.
Non-return valve
10
P 320 boiler with domestic hot water production using an independent tank
3
6
5
9
15
16
17
9
19
20 9
18
Example of an installation:
The example of an installation shown below does not cover every
possible configuration. Its sole aim is to draw your attention to the
basic rules to be respected. Comply at all times with the codes of
practice and the prevailing national or local regulations.
7
10
9
9
9
9
9
9
57
9
56
27
7 9
26
9
31
17
30
28.
Domestic cold water inlet
29.
Pressure reducer (if mains pressure 5.5 bar)
30.
Sealed safety unit calibrated to 7 bar with indicator type discharge
31.
Independent domestic hot water tanks
32.
Domestic hot water loop pump (optional)
56.
Domestic hot water circulation loop return
57.
Domestic hot water outlet
P 320
1
14
11
27
12
2
9
17
32
27
29
9
28
8219N008C
20/09/2011 - 300016243-001-D
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