en
22
Installation
Indications,
functions and options
Messages
Commissioning
Operation and function
Arrangement 4: Solar system with stratified store
The controller calculates the temperature difference between collector sensor
S1 and store sensors S2 and S3. If the difference is larger than or identical to the
corresponding adjusted switch-on temperature differences (DT1O / DT2O), the
solar pump will be activated by relay 1, and the corresponding store zone will be
loaded until the switch-off temperature difference (DT1F / DT2F) or the maximum
store temperature (S1MX / S2MX) is reached. The priority logic causes priority
loading of the upper store zone, if possible. In that case, the 3-port valve will be
operated by relay 2.
If the heat quantity measurement option (OHQM) is activated, S1, S4 or VFD can
be used for measuring the temperature (see table on p. 63).
PWM 2
PWM 1
VFD
L
N
R1
N
20
19
18
17
16
15
14
13
12
1 2
N R2
S2
S1
S3
S4 VBus
3 4 5 6 7 8 9 10
S2
R1
R2
S1
S4 / VFD / TR
S4 / VFD / TFL
S3