High heat output number

[ispookie666]

Had the heat pump installed last week - Vaillant Arotherm + 10kw

Slowly getting the grip of the controls and fine-tuning them.

I’m tyring to understand why the Heat output is -7913 W and max is 37803 W.

PS: The flow temperature peaks are due to setting an automation to boost DHW to 55 when there is excess solar.

[John (John Gouk)]

Try clicking on Show detail, then selecting Show defrosts and other heat lost - you’ll see a very brief negative heat probably when the DHW kicked over - see mine below. It’s when the return is hotter than the flow because the DHW tank is heating up the colder HP output water.