Key:
1 - Electric control box.
2 - Controller / User interface.
3 - Start/stop switch.
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:
21 - HP return sensor.
22 - DHW sensor.
23 - HP ow sensor.
gure 9 - Hydraulic unit components
3
12
1
10
4
9
8
21
23
14
5
17
22
16
11
9
9
2
15
13
6 7
Installation and Operating Manual "1821- EN" - 13 -
Alféa Extensa Duo A.I. Heat Pump
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