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  1. Marvin
    Would someone please confirm my understanding of how a PID system works on an (my) ASHP and if I understand correctly what changing the settings would do. A proportional–integral–derivative controller (PID controller) adjusts the output rate to avoiding excessive over shooting or under shooting of the set point when changing the temperature to meet the set point. . The Kp setting would be the difference at which the controller would react (mine set at 5C) The Integral setting would be how long before the controller would act (mine set at 200s) The Differential would indicate something to do with the relationship between 2 PIDs? (mine is set at 0s) As I tend to understand that the ASHP "runs" most efficiently when at the lowest temperature to achieve the desired result, and for at least 10 minutes a go, I was trying to understand how altering the PID settings would effect this optimum aim. My guess is the answer as what to do with it would be "Don't touch it"? Thanks Marvin
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