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13
09/06/2011 - 300025088-001-B
NXR4i
4.
Installation
4.4 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.
NXR4i boiler with domestic hot water production using an independent tank.
L000047
9
2
14
12
17
11
27
9
56
32
9
10
1
9
57
9
27
26
15
9
17
18
9 19
20 9
17
16
13
3
7 9
7
30
28
9
29
27
9
31
5
6
9
9
9
1
Heating flow
2
Heating return
3
3-bar safety valve + Pressure gauge
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
20
Water meter
26
DHW load pump
27
Non-return valve
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