Hi. Ignore the cascade bit. At this point it’s just a question about EI’s, how it is calculated and how the value determines whether the heat pump runs. The sense from everyone I speak to is that it turns off at 0 and back on at -60. I’m looking to see whether people have evidence that actually happens.
And yes Vaillant are aware of this matter as is my installer. Neither have answers.
How is the" Compressorhyster.Heat." setting ? Default 7K, max, 15K, means that when the flow temperature is above 7K than desired flow temp, the compressor stops regardless of the integral.
It may help to prevent the to early switch off.