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Program 481:
Feed pump
A3 runs if:
S1 is greater than threshold min1 and S1 is higher than S4 by the difference diff3
and S4 has not exceeded threshold max3
or
S3 is greater than threshold min2 and S3 is higher than S4 by the difference diff3
and S4 has not exceeded threshold max3.
or
S5 is greater than threshold min3 and S5 is higher than S4 by the difference diff3
and S4 has not exceeded threshold max3.
A3 = (S1 > (S4 + diff3) & S1 > min & S4 < max3)
or (S3 > (S4 + diff3) & S3 > min2 & S4 < max3)
or (S5 > (S4 + diff3) & S5 > min3 & S4 < max3)
S1 S3
min1 min2
S2
max1
max2
S1 S3 S5
min1 min2 min3
S4
max3
diff2
A2
diff1
A1
diff3
A3
Required settings:
max1 … limit CYL 1 S2 A1
max2 … limit CYL 1 S2 A2
max3 … limit CYL 2 S4 A3
min1 … switch-on. t. heat source S1 A1, A3
min2 … switch-on temp. boiler S3 A2, A3
min3 … switch-on. temp. CYL 1S5 A3
diff1 … heat source S1 – CYL 1 S2 A1
diff2 … boiler S3 – CYL 1 S2 A2
diff3 … heat source S1 – CYL 2 S4 A3
boiler S3 – CYL 2 S4 A3
CYL 1
S5 – CYL 2 S4 A3
diff3
A3
diff3
A3