Diagram B0
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Diagram B0:
Solar power system, 2 feed pump functions, burner requirement
Sensors
Outputs
T1…. Collector
A1…. Solar pump
T2…. Tank TK2 bottom
A2…. Feed pump TK2
T3…. Tank TK1 center
A3…. Feed pump TK1
T4…. Tank TK1 bottom
A4…. Burner requirement
T5…. Tank TK1 top
T6…. Boiler
Program B0:
Function according to
diagram.
A1 = T1 > (T4 + diff1) & T4 < max1
A2 = T5 > (T2 + diff2) & T5 > min1 & T2 < max2
A3 = T6 > (T3 + diff3) & T6 > min2 & T3 < max3
A4 (on) = T5 < max4 – hysteresis
A4 (off) = T5 > max4
T1 T5 T6
min1 min2
diff1 diff2 diff3
A1 A2 A3
T4 T2 T3
max1 max2 max3
Required settings:
diff1
…coll. T1 – TP1 T4
A1
diff2
…TK1 top T5 – TK2 T2
A2
diff3
…boiler T6 – TK1 T3
A3
diff4
…see all pr1
min1
…switch-on temp. TK1 T5
A2
min2
…switch-on temp. boiler T6
A3
max1
…limit TK1 T4
A1
max2
…limit TK2 T2
A2
max3
…limit TK1 T3
A3
max4
…burner requirement T5
A4
Burner A4
T5 max4
Burner
requirement
TK1
TK2