Why is my heat pump heating the central heating when there is no demand?

Hi. Hope this is the right place to ask. Just had a heat pump installed about a month where the thermostat is set to 16 degrees, where the house has always been about 20 degrees without heating, yet the heat pump is very occasionally sending a small amount of got water through the radiators. 13kWh according to the display this month. Do Vaillant Arotherms have to cycle a minimum amount? Thanks in advance

Does it coincide with a hot water cycle? Our Nibe will sometimes redirect some excess hot water into the heating as far as I can tell.

depends of your heat curve and the room influence setting

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