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21
[X15] External 3-port valve (max. 0.03 A, P = 6 W)
22
[X1] 230 V supply for control PCB
23
[X12] 230 V output, e.g. SR 40
24
F1 T 4 A/250 V fuse
25
[X28] Data connection to the power supply PCB
26
[X22] Immersion heater flow temperature sensor
27
[X22] Heating pump signal
244
28
[X22] Pressure sensor
29
[X22] Building circuit flow temperature sensor
30
[X22] Building circuit return temperature sensor
31
[X22] Domestic hot water cylinder temperature
sensor
32
[X23] Internal 3-port valve
33
[X21] Condenser outlet temperature sensor
34
[X21] Condenser inlet temperature sensor
Installation and maintenance instructions 8000017440_FT
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