How do I proceed if I want to install a differential pressure-regulated heating pump in an existing system with overflow valves?

In the case of non-regulated fixed speed pumps, an overflow valve limits rising pressure when closing the radiator thermostat by moving the medium from the flow pipe to the return pipe.

When installing differential pressure-regulated pumps, you should remove or block overflow valves, as two control loops might have a disruptive influence on one another. It is possible that the safety guidelines issued by the manufacturers of heat generators will advise against so doing. Please observe the manufacturer's instructions.

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