Hi there.. I recently had a Daikin heat pump system installed for heating the house. (air to water, model EKHBRD016ACV1).

However the built-in circulation pump deemed insufficient for the 3-story house, so the installer added another circulation pump to the system.

The second pump is connected directly to 220v mains, and runs all the time, which irks me to no end, thinking of the wasted electricity.

So I ordered a 220v relay in an attempt to take connections from the original (internal) circulation pump, and activate the relay, which will activate the external pump. This way, the external pump will only run when necessary. At least, this is my plan. Does anyone see a better way of achieving this, or why this might fry up the machine?

Many thanks, -turgut