Laing D5 Solar/090B PV-Direct Circulating Pump

Soft start-up
The pump has been programmed for a soft start-up. When the photovoltaic panel provides sufficient power, the pump first goes through the alignment phase, turning the rotor into the position required for start-up. Then the processor waits until the built-in capacitor has recharged sufficiently. This enables a start-up with minimal power (less than one Watt!). Cycling due to unsuccessful starting attempts is minimized. Even after prolonged shutdown, the pump will start reliably.

Automatic performance optimization – MPP tracking
The Ecocirc DC pumps are the first and only spherical motor pumps with self-optimizing software (see diagram). Every three seconds, the processor will modify its operating point on the voltage-current curve of the PV panel to find the point of maximum performance. This is called the “Maximum Power Point” (MPP).

At this point, the pump achieves the maximum rpm and therefore the maximum performance. There is no need for a separate performance adaptation, the pump will always find its best operating point under any given light and temperature conditions by itself.

(Curves for the model 710B and model 720B are the same.)

Warranty
Laing Thermotech, Inc. (Laing) warrants that Laing pumps shall be free from defects in materials and workmanship for a period of twenty-four (24) months from the date of manufacture or twelve (12) months from the date of user purchase (with proof of purchase), which ever is later.