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fi g. 9 - Hydraulic unit components
Key :
1. Electric control box.
2. Controller / User interface.
3. Start/stop button.
4. Hydraulic unit circulation pump.
5. Distribution valve.
6. "Gas" refrigeration connection.
7. "Liquid" refrigeration connection.
8. Condensation sensor.
9. Drain valve.
10. Safety valve.
11. Safety thermostat.
12. Pressure gauge.
13. Automatic bleeder valve.
14. Expansion vessel.
15. Condenser.
16. HP electrical backup.
17. DHW electrical backup.
Sensors :
20. Heat pump return sensor.
21. Domestic Hot Water sensor.
22. Heat pump fl ow sensor.
3
12
1
10
4
9
8
14
22
5
17
21
16
11
9
2
15
13
67
20
■ Hydraulic unit
13
Alfea Extensa A.I. R32 / INSTALLATION / 2114 - EN
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