Appendix
0020291544_01 Hydraulic Station Installation and maintenance instructions
41
Appendix
A
Functional diagram
1
2
3
4
5
6
7
8
9
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
