Vaillant ecoTEC VUW - Appliance Description; Functional Elements of the VU System Boiler; Functional Elements of the VUW Combination Boiler

Description of the appliance
Installation and maintenance instructions ecoTEC 0020173113_01 11
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3 Description of the appliance
Design
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3.1 Functional elements of the VU system boiler
Key
1 Gas valve
2 Water pressure sensor
3 Heat exchanger
4 Connection for the air/flue gas duct
5 Expansion vessel
6 Air intake pipe
7 Compact thermal module
8 Ignition electrode
9 Fan
10 Automatic air vent
11 Pressure gauge
12 Internal pump
13 Expansion relief valve
14 Electronics box
15 By-pass valve
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3.2 Functional elements of the VUW combination boiler
Key
1 Gas valve
2 Water pressure sensor
3 Heat exchanger
4 Connection for the air/flue gas duct
5 Expansion vessel
6 Air intake pipe
7 Compact thermal module
8 Ignition electrode
9 Fan
10 Automatic air vent
11 Pressure gauge
12 Internal pump
13 By-pass valve
14 Expansion relief valve
15 Electronics box
16 Diverter valve
17 Impeller sensor (hot water)
18 Secondary heat exchanger