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12
S6
A3
S4
S2
A1
S5
A2
A1
S1
Program 320 - Layered tank and load pump
Only effective with speed control activated.
(Absolute value control system: AC N1)
No symbol for S5 and
heat exchanger
Program 320: Solar pumps A1 run 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.
The three-way valve A2 switches up when:
S5 is greater than the threshold min2 or S5 is greater than S4 by the difference diff2
and S4 has not exceeded the threshold max2.
The feed pump A3 runs when:
S6 is greater than the threshold min3 and S6 is greater than S2 by the difference diff3
and S2 has not exceeded the threshold max3.
A1 = S1 > (S2 + diff1) & S1 > min1 & S2 < max1
A2 = (S5 > min2 or S5 > (S4 + diff2)) & S4 < max2
A3 = S6 > (S2 + diff3) & S6 > min3 & S2 < max3
All programs +1: When S4 has reached threshold max2 the quick warm-up phase is completed and
consequently the speed control blocked optimum efficiency.
If PSC (pump speed control) is activated, the speed level is set to the maximum level, if control output
1 is activated; the analog level for the maximum speed is output. Control output 2 is not changed and
continues control.
All programs +8 (independent load pump A3): the pump A3 runs when:
S6 is greater than threshold min3 and S6 is greater than S3 by the difference diff3
and S3 has not exceeded threshold max3.
A3 = S6 > (S3 + diff3) & S6 > min3 & S3 < max3
S1 S6 S5 S5
min1 min3 <min2 >min2
A2
S2 S4 S4
max1 max2 max2
max3
diff3
A3
diff1
A1
diff2
A2
Required settings:
max1 … limit TK S2 A1
max2 … limit TK S4 A2
max3 … limit TK S2 A3
min1 … switch-on temp. coll. S1 A1
min2 … switch-on temp.ssl. S5 A2
min3 … switch-on temp. boiler S6 A3
diff1 … coll. S1 – TK S2 A1
diff2 … supply l. S5 – TK S4 A2
diff3 … boiler S6 – TK S2 A3
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