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Program 64 - Solar power system with 2 collector panels
Program 64: Pump A1 runs when:
S1 is greater than the threshold min1 and S1 is greater than S3 by the difference diff1
and S3 has not exceeded the threshold max1.
Pump A2 runs when:
S2 is greater than the threshold min2 and S2 is greater than S3 by the difference diff1
and S3 has not exceeded the threshold max1.
A1 = S1> (S3 + diff1) & S1 > min1 & S3 < max1
A2 = S2> (S3 + diff1) & S2 > min2 & S3 < max1
All programs +1:
If the difference between collector sensors S1 and S2 exceeds the difference diff3, the
colder collector is switched off. This prevents heat from being lost in the colder collector when
temperatures are mixed.
All programs +2:
In addition, if S4 exceeds the threshold max2, pumps A1 and A2 are switched off.
All programs +4:
Instead of the pumps, one pump A1 and a three-way valve A2 are used.
WARNING: This program is not intended for systems with two collector fields, since through
a three-way valve one collector field is always operated at standstill.
Note: The additional application of the priority circuit "All programs +1" is recommended.
A1 ... common pump A2 ... valve
S1 S2
min1 min2
S3
max1
diff1
A2
diff1
A1
Required settings:
max1 … limit CYL S3 A1, A2
max2 … see all programs +2
min1 … switch-on temp. coll.1 S1 A1
min2 … switch-on temp. coll.2 S2 A2
diff1 … coll.1 S1 – CYL S3 A1
… coll.2 S2 – CYL S3 A2
diff3 … see all programs +1
CET 2 ... ON
A1 A2
S1 S2
S3
S4
S4 for program +2
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