28
A1
A2
S1
S2
S3
A3
S4
S5
TK1
TK2
Program 272 - Solar power system with 2 collector panels and feed pump function
Only one collector
field portrayable
Program 272:
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:
S5
is greater than the threshold
min3
and
S5
is greater than
S4
by the difference
diff2
and
S4
has not exceeded the threshold
max2
.
A1 = S1 > (S3 + diff1) & S1 > min1 & S3 < max1
A2 = S2 > (S3 + diff1) & S2 > min2 & S3 < max1
A3 = S5 > (S4 + diff2) & S5 > min3 & S4 < max2
All pr1:
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 pr2:
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 pr1" is recommended.
Required settings:
max1
… limit TK1
S3
A1, A2
max2
… limit TK2
S4
A3
min1
… switch-on temp. coll.1
S1
A1
min2
… switch-on temp. coll.2
S2
A2
min3
… switch-on temp. TK1
S5
A3
diff1
… coll.1
S1
– TK1
S3
A1
… coll.2
S2
– TK1
S3
A2
diff2
… TK1
S5
– TK2
S4
A3
diff3
… see all pr1
S1
S2 S5
min1
min2 min3
S3
S4
max1
max2
diff1
A2
diff1
A1
diff2
A3