Hello,
I am new to the forum, hopefully putting this post in the right topic.
I am looking for some advice on the weather curve settings.
Added some pictures below. On one of them you will see the outdoor temp goes up by a degree and the HP can’t really make up its mind anymore. When the weather is closer to 0 C, it is 100% happy but if it gets near 10, things fall apart a bit.
Question is: What way should I adjust the weather curve? I don’t mind if the flow temp is a bit higher as long as it would reduce the cycling. (As I understand Daikins don’t like to go below 30 C flow temp.)
Change the slope? Raise the minimum or the max? Let me know your thoughts.
It’s a 4kw unit, controlled by the Madoka + weather comp.
Just to reinforce the advice from Dan, those graphs look pretty good to me:
Your internal temperature (Black line) is very stable
Your COP and SCOP figures are decent
Sure, there are cycles once it gets warmer outside, but cycling every 90 minutes is absolutely no issue and totally what the unit was designed to do once it’s at minimum output
It’s only once cycles get shorter than about 20 minutes that there’s any cause for concern
If you try to change the WC curve in an attempt to reduce the cycling, you’ll end up putting more heat into the property when it’s warmer outside, which will use more electricity and make it too warm inside
Although actually the Madoka will spot that and correct the target temperature down again
Those distinct ’steps’ in the target temperature (Grey line) - like the one you’ve labelled 31.3 / 28.8 - appear to align with small changes in the internal temperature, which is presumably the Madoka applying its room temperature feedback on top of the WC curve baseline. While those steps look quite dramatic, a 2.5 degree change in the target temperature is nothing to worry about.
