18
S2
S4
A1
S3
A2
A1
S1
Program 144 - Solar power system with layered storage cylinder loading
A layered system only makes sense if the speed control is activated!
(Absolute value control system: AC N1)
Program 144: Solar pumps A1 run when:
S1 is greater than the threshold min1 and S1 is greater than S2 by the difference diff1
and S2 has not exceeded the threshold max1.
The three-way valve A2 switches up when:
S3 is greater than the threshold min2 or S3 is greater than S4 by the difference diff2
and S4 has not exceeded the threshold max2.
A1 = S1 > (S2 + diff1) & S1 > min1 & S2 < max1
A2 = (S3 > min2 or S3 > (S4 + diff2)) & S4 < max2
Program 145:
If S4 has reached max2, the quick warm-up phase has been completed, and the speed
control is thus blocked
optimal efficiency.
If PSC (pump speed control) is activated, the speed level is set to the maximum level, if
control output 1 is activated; the analog level for the maximum speed is output. Control
output 2 is not changed and continues control.
S1 S3 S3
min1 <min2 >min2
A2
S2 S4 S4
max1 max2 max2
diff2
A2
diff1
A1
Required settings:
max1 … limit CYL S2 A1
max2 … limit CYL S4 A2
min1 … switch-on temp. coll. S1 A1
min2 … switch-on temp. supply l. S3 A2
diff1 … collector S1 – CYL S2 A1
diff2 … supply line S3 – CYL S4 A2
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