Vaillant VWL Series User Manual

Appendix
0020291544_01 Hydraulic Station Installation and maintenance instructions 41
Appendix
A Functional diagram
1 2
3
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10
11
12
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
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

Vaillant VWL Series Specifications

General

Type	Air-to-water heat pump
Refrigerant	R32
Operating Temperature Range (Heating)	-20°C to +35°C
Power Supply	230 V / 400 V, 50 Hz
Weight	90 - 150 kg