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3.2 Boiler connections
Key:
1 Heating system return (22 mm tail)
2 Cold water connection with shut off valve (15 mm
tail)
3 Gas connection (22 mm tail)
4 Hot water connection (15 mm tail)
5 Heating system flow (22 mm tail)
6 Flue outlet (100 mm flue with turret)
7 Hanging bracket
Fig. 3.1: Connection diameters
7
543 21
6
122
780
100100
35 35
6
310
5 4321
130
180
3 Boiler Specification
Instructions for installation and servicing aquaPLUS VUI 362-76
3.3 Functional Diagram
Key:
1 Air duct
2Fan
3 Power store
4 Main heat exchanger
5 Temperature sensor (NTC I)
6 Temperature sensor (NTC III)
7 Diverter valve
8 DHW pressure relief valve
9 Temperature sensor (NTC IV)
10 DHW heat exchanger
11 DHW expansion vessel
12 DHW pump
13 Automatic bypass valve
14 CH flow service valve
15 Hot water outlet
16 Gas service valve
17 Cold water service valve
18 CH return service valve
19 Filling loop
20 Pressure relief valve
21 Aqua sensor (DHW flow switch)
22 Expansion vessel
23 Electronic box
24 Fully modulating automatic gas value
25 Circulating pump
26 Automatic air vent
27 Modulating burner
28 Temperature sensor (NTC II)
29 Air pressure switch
30 Flue gas duct
6


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