8
Note:
In programs 0 - 2, the system condition "Collector - excess temperature reached" is indicated
in the menu Status by the advice CETOFF for Collector Excess Temperature switch off.
Some countries only offer subsidies for the installation of solar thermal systems if the control
units have a function check to detect a sensor defect and a lack of circulation. In the menu
command F CHCK, the mechanic can activate this function check for the ESR31. It applies
likewise for this program and is deactivated in the factory settings. For details, see “Status
display Status”.
Program 4 – 7 - Loading pump control
Program 4
The loading pump A runs when S1 has exceeded the threshold min, the temperature of
S1 is diff higher than S2, and S2 has not yet crossed the threshold max.
Program 5
The loading pump function has an additional storage limiter max2 via sensor S3.
Program 6
As program 4, however with additional 10 V burner requirement via S3 and S2 at control
output.
A = S1 > min & S1 > (S2 + diff) & S2 < max
Control output COP: 10 V = S3 < min2 (burner on)
0 V = S2 > max2 (burner off)
Subsequently, an auxiliary relay can be connected to the control output HIREL-STAG, which
forwards the burner requirement in potential-free format. The active control output is indicat-
ed by the flashing burner symbol in the display.
diff
S2
max … limit TK S2
max2 … see program 5 or 6
min … switch-on temp. boiler S1
min2 … see program 6
diff … boiler S1 – TK S2
Additional required settings:
max2 … COP off (0V) S2 (ex works = 65°C)
min2 … COP on (10V) S3 (ex works = 40°C)
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