Quick question: If you have the schedule set to be 21C by 1800 then the optimisation comes on in as it should but always by 1800 the room temp is only at 20C and seems to hover there all evening maybe getting to 21C - 3 or so hours later. Increasing the max flow temp allowed on the boiler seems to make no difference as the boiler still modulates down to the same flow temp 1C off the set temp. This seems to be because the OpenTherm reduces the flow temp at 20C assuming that there is still enough heat being put into the house to raise it to 21C. So now I have set it to be 22C by 1800 so that it wont start reducing down until the room temp is up to 21C which is usually by about 1800. Then an hour later at 1900 I then set a schedule period to be 21C for the rest of the evening, this then seems to be the best match for modulation and control of room temp.
Does anyone else follow this practice or similar?
Does anyone else follow this practice or similar?
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