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Program 512 - 3 independent differential loops
Program 512: Pump A1 runs 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.
Feed pump A2 runs when:
S3 is greater than the threshold min2 and S3 is greater than S4 by the difference diff2
and S4 has not exceeded the threshold max2.
The feed pump A3 runs when:
S5 is greater than the threshold min3 and S5 is greater than S6 by the difference diff3
and S6 has not exceeded the threshold max3.
A1 = S1 > (S2 + diff1) & S1 > min1 & S2 < max1
A2 = S3 > (S4 + diff2) & S3 > min2 & S4 < max2
A3 = S5 > (S6 + diff3) & S5 > min3 & S6 < max3
All programs+1:
if sensor S2 has reached the threshold max1 pump A2 is activated and
pump
A1 continues running. A "cooling function" to the boiler or the heating is thereby
achieved without the occurrence of standstill temperatures at the collector.
CYL 1 CYL 2 CYL 3
S3
S4
A2
S5
A3
S6
S1
S2
A1
Required settings:
max1 … limit CYL 1 S2 A1
max2 … limit CYL 2 S4 A2
max3 … limit CYL 3 S6 A3
min1 … switch-on temp. coll.1 S1 A1
min2 … switch-on temp. coll.2 S3 A2
min3 … switch-on temp. coll.3 S5 A3
diff1 … coll.1 S1 – CYL 1 S2 A1
diff2 … coll.2 S3 – CYL 2 S4 A2
diff3 … coll.3 S5
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