Appendix; A Functional Diagram - Vaillant VWL Series Operating Instructions Manual

Appendix

A Functional diagram
12
11
10
9 8
1 Automatic air vent
2 Flow temperature sensor: Electric back-up heater
output
3 Back-up heater
4 Heating return to the outdoor unit
5 Heating flow from the outdoor unit
6 Heating circuit, return, domestic hot water
0020291544_01 Hydraulic Station Installation and maintenance instructions
1 2
3
7 6 5 4
7 Heating circuit, flow, domestic hot water
8 Building circuit, flow, heating
9 Building circuit, return, heating
10 Expansion relief valve, 3 bar
11 Prioritising diverter valve
12 Diaphragm expansion vessel
Appendix
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