ELECTRONIC CIRCULATOR FOR SOLAR THERMAL SYSTEMS - Art. S167
FI.S167.EN.C - 03/2023
Icma SpA - Via Garavaglia, 4 - 20012 Cuggiono (MI) ITALY Tel: +39 02 97249134 - +39 02 97249135 - www.icmaspa.it - [email protected]
Icma SpA - Via Garavaglia, 4 - 20012 Cuggiono (MI) ITALY Tel: +39 02 97249134 - +39 02 97249135 - www.icmaspa.it - [email protected]
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7.1 The control on the pump
During the operation of the pump, control it according to “proportional pressure control” (BL) principle or “constant
pressure control” (HD) principle.
In these two control modes, the performance of the pump and corresponding power consumption should be adjusted
according to the heat demand of the system.
7.1.1 Proportional pressure control
In this control mode, the pressure difference on both ends of the pump shall be controlled by the flow. Proportional
pressure curve in Q / H diagram is represented by BL1/BL2 /BL3 (Section 11).
7.1.2 Constant pressure control
In this control mode, the pressure difference on both ends of the pump remains constant, having nothing to do with
flow. In Q/H figure, constant pressure curve is a level performance curve, represented by HD1/HD2 (Section 11).
Position
System Type
Settings of the pump
Optimal settings
Or other optional settings
A
Floor heating system
AUTO
HS3
B
Dual pipeline heating system
AUTO
BL3
C
Single pipeline heating system
AUTO
HS3
•
AUTO (auto adaptation) mode shall adjust the pump performance automatically according to the actual heat
demand of the system. Since performance is adjusted gradually, it is recommended that leave it in the AUTO (auto
adaptation) mode for at least a week before changing the settings of the pump.
•
If you choose to change back to AUTO (auto adaptation) mode, the pump can remember the set points of its
previous AUTO mode and continue to adjust the performance automatically.
•
Pump settings change from optimal settings to other optional settings, heating system is a slow system, it is
impossible to achieve optimal operation mode within several minutes or hours. If the optimal settings of the pump
fail to achieve ideal heat distribution for each room, you should change the pump settings to other settings.
•
For the relationship between pump settings and performance curve, please see Section 11.
