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Program 288 - Solar power system with 2 collector panels and burner requirement
Program 288: 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.
Output
A3 switches on when: S5 falls short of threshold min3.
Output
A3 switches off (dominant) when S4 exceeds max3.
A1 = S1 > (S3 + diff1) & S1 > min1 & S3 < max1
A2 = S2 > (S3 + diff1) & S2 > min2 & S3 < max1
A3 (on) = S5 < min3 A3 (off) = S4 > max3
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:
The burner requirement (A3) only occurs via sensor S5
A3 (on) = S5 < min3 A3 (off) = S5 > max3 (dominant)
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.
S1 S2
min1 min2
S3
max1
diff1
A2
Burner
A3
S5 min3
S4 max3
Required settings:
max1 … limit CYL S3 A1, A2
max3 … burner req. off CYL S4 A3
min1 … switch-on temp. coll.1 S1 A1
min2 … switch-on temp. coll.2 S2 A2
min3 … burner req. on CYL S5 A3
diff1 … coll.1 S1 – CYL S3 A1
… coll.2 S2 – CYL S3 A2
diff3 … see all programs +1
CET 2 ... ON
diff1
A1
S1 S2
S3
A1 A2
S5
A3
S4
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