Viessmann SCU224 Instrukcja Obsługi Pobierz pdf (Strona 6)

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SCU224

S4 / TR

System layout 1

The controller calculates the temperature difference bet-

ween collector sensor S1 and tank sensor S2. If the diffe-

rence is larger than or identical to the adjusted switch-on

temperature difference (DT O), the solar pump will be

operated by relay 1, and the tank will be loaded until the

switch-off temperature difference (DT F) or the maximum

tank temperature (S MX) is reached.

Sensors S3 and S4 can optionally be connected for mea-

surement purposes.

Arr 1

1.4 Terminal allocation in the different system layouts

Display Channels

Channel Description Terminal Page

INIT

ODB initialization active - 37

FLL

ODB ﬁlling time active - 37

STAB

ODB stabilization in progress - 37

COL x Temperature collector S1 37

TST x Temperature tank S2 37

S3 x Temperature sensor 3 S3 37

S4 x Temperature sensor 4 S4 37

TR x* Temperature return sensor S4 37

n % x Pump speed R1 R1 38

hP x Operating hours R1 R1 38

hP1 x* Operating hours R1 (if OBST is activated) R1 38

hP2 x* Operating hours R2 (if OBST is activated) R2 38

kWh x* Heat quantity kWh - 38

MWh x* Heat quantity MWh - 38

TIME x Time - 34

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

be connected as return sensor.

If the drainback option (ODB) is activated, relay 2 can be

used to operate a booster pump by activating the booster

function (OBST).

Note:

Viessmann Vitosol collectors cannot be used in

drainback systems.

1 2 3 4 5 6 7 8 9 10 11 ... 51 52

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Viessmann SCU224 Instrukcja Obsługi Strona 6