PAW replacement set for solar pumps

The PAW solution for replacing solar pumps and

changeover to high-efficiency technology

Since August 2015, within the scope of the European Ecodesign

directives for energy related products (811/2013 and 812/2013)

to increase the energy efficiency, pumps with asynchronous

motors must not be operated any longer in solar thermal

installations.

As already established for heating technology, solar instalations

must also be operated with high-efficiency pumps from now

on.

Controllers of old solar installations are usually incompatible

with new high-efficiency technology.High-e

fficiency pumps

require always constant mains voltage for operation, the speed

control is effected via separate/additional control signals (0-10 V

or PWM signal).

Old controllers are not equipped with an appropriate control

signal output.

In the case that an existing (asynchronous) pump has to be

exchanged without replacing the controller, PAW offers the

PAW replacement set for solar pumps, consisting of:

• High-efficiency pump

• Pump signal converter (PSW)*

• Connection cables

• Gaskets

The following table helps you to find the suitable replacement

set for the solar installation.

*The pump signal converter converts the controlled 230 V

alternating voltage such as control via pulse packages, phase

angle or trailing-edge phase to a PWM or 0-10 V control signal.

How to replace the pump

• Dismount the asynchronous pump and replace it with a high-efficiency pump.

• Connect the PSW to the controller (to the same relay to which the old pump was connected to).

• Connect the PSW to the pump plugs and plug the shock-proof plug into a socket.

• The PSW is correctly preset for the pump.

Thus, complex solar installations can be continuously operated with the existing controller.

Whether to replace a faulty asynchronous pump or to increase the efficiency of a installation: the PAW service team will assist you

in the selection of a high-efficiency pump with appropriate characteristic curve.

Solar pump replacement set for solar installations

DN 20 (3⁄4")

DN 25 (1")

DN 32 (11⁄4")

Item no.

12187314

12387313

Item no. 12187414

Item no. 12187514

Pump

Grundfos UPM3

Solar 15-145

Wilo PARA ST

15-130/13

Grundfos Solar PML 25-145

Grundfos Solar PML 32-145

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Prices excl. VAT • 01/2020 • Printed in Germany

PAW GmbH & Co. KG • 31789 Hameln • Germany • Phone: +49-5151-9856-0 • Fax: +49-5151-9856-98 • info@paw.eu • www.paw.eu

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