Viessmann SCU224 Manual de Serviço descarregar pdf (Página 18)

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SCU224

System layout 5

The controller calculates the temperature differences

between collector sensor S1 and tank sensors S2 and S3. If

the differences are larger than or identical to the adjusted

switch-on temperature differences (DT1O / DT2O), the so-

lar pump will be operated by relay 1, and the respective tank

will be loaded until the switch-off temperature differences

(DT1F / DT2F) or the maximum tank temperatures (S1MX /

S4 / TR

S2 S3

Arr 5

Tank 1

Tank 2

Display Channels

Channel Description Terminal Page

COL x Temperature collector S1 37

TST1 x Temperature tank 1 bottom S2 37

TST2 x Temperature tank 2 bottom S3 37

S4 x Temperature sensor 4 S4 37

TR x* Temperature return sensor S4 37

n % x Pump speed relay R1 38

hP1 x Operating hours R1 R1 38

hP2 x Operating hours R2 R2 38

kWh

Heat quantity kWh - 38

MWh

Heat quantity MWh - 38

TIME

Time - 34

S2MX) are reached. The priority logic causes priority loading

of tank 1, if possible. For loading tank 2 the 3-way-valve will

be operated by relay 2.

Sensor S4 can optionally be connected for measurement

purposes.

If energy metering (OHQM) is activated, sensor S4 has to

be connected as return sensor.

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Viessmann SCU224 Manual de Serviço Página 18