37
Pump
A1 runs when:
S4 is greater than the threshold min1 and S4 is greater than S1 by the difference diff1
and S1 has not exceeded the threshold max1.
or
S5 is greater than the threshold min2 and S5 is greater than S1 by the difference diff3
and S1 has not exceeded the threshold max1.
Feed pump A2 runs when:
S4 is greater than the threshold min1 and S4 is greater than S2 by the difference diff2
and S2 has not exceeded the threshold max2.
or
S5 is greater than the threshold min2 and S5 is greater than S2 by the difference diff3
and S2 has not exceeded the threshold max2.
A1 = (S4 > (S1 + diff1) & S4 > min1 & S1 < max1)
or (S5 > (S1 + diff3) & S5 > min2 & S1 < max1)
A2 = (S4 > (S2 + diff2) & S4 > min1 & S2 < max2)
or (S5 > (S2 + diff3) & S5 > min2 & S2 < max2)
All programs+4: The burner request (A3) is only made via S4.
A3 (on) = S4 < min3 A3 (off) = S4 > max3 (dominant)
All programs +8: (Cannot be used with +2!)
Both feed pump loops have separate switch-on thresholds at S4:
Output
A1 retains min1, and A2 switches at min2.
The
priorities for CYL 1 and CYL 2 can be set in the parameter menu under PA.
Program 432 - Solar power system, burner requirement, and one feed pump
Required settings:
max1 … limit CYL S2 A1
max2 … limit CYL S4 A2
max3 … burner req. off CYL S4 A3
min1 … switch-on temp. coll. S1 A1
min2 … switch-on temp. boiler S3 A2
min3 … burner req. on CYL S5 A3
diff1 … coll. S1 – CYL S2 A1
diff2 … boiler S3
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