Viessmann SCU224 Wartungshandbuch PDF herunterladen (Seite 22)

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SCU224

System layout 7

The controller calculates the temperature differences

between the collector sensors S1 and S3 and the tank

sensor S2. If the differences are larger than or identical to

the adjusted switch-on temperature difference (DT O), the

respective solar pump will be operated by relay 1 and / or

Arr 7

Display Channels

Channel Description Terminal Page

COL1 x Temperature collector 1 S1 37

TST x Temperature tank S2 37

COL2 x Temperature collector 2 S3 37

S4 x Temperature sensor 4 S4 37

n1 % x Pump speed R1 R1 38

n2 % x Pump speed R2 R2 38

h P1 x Operating hours R1 R1 38

h P2 x Operating hours R2 R2 38

TIME x Time - 34

relay 2, and the tank will be loaded until the switch-off

temperature difference (DT F) or the maximum tank tem-

perature (S MX) is reached.

Sensor S4 can optionally be connected for measurement

purposes.

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Viessmann SCU224 Wartungshandbuch Seite 22