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Program 304 - Solar power system with 2 collector panels + feed pump (boiler)
Program 304: 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.
The feed pump A3 runs when:
S4 is greater than the threshold min3 and S4 is greater than S3 by the difference diff2
and S3 has not exceeded the threshold max2.
A1 = S1 > (S3 + diff1) & S1 > min1 & S3 < max1
A2 = S2 > (S3 + diff1) & S2 > min2 & S3 < max1
A3 = S4 > (S3 + diff2) & S4 > min3 & S3 < max2
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:
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.
Required settings:
max1 … limit CYL S3 A1, A2
max2 … limit CYL S3 A3
min1 … switch-on temp. coll.1 S1 A1
min2 … switch-on temp. coll.2 S2 A2
min3 … switch-on temp. boiler S4 A3
diff1 … coll.1 S1 – CYL S3 A1
… coll.2 S2 – CYL S3 A2
diff2 … boiler S4 – CYL S3 A3
diff3 … see all programs +1
CET 2 ... ON
S1 S2 S4
min1 min2 min3
S3
max1
max2
diff1
A2
diff1
A1
diff2
A3
S1 S2
S3
A1 A2
A3
S4
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