This is my first post and, first of all, I would like to thank you for writing and maintaining this forum. I learned a lot on the use of the EvoHome system here.
Unfortunately, I found the official documentation really poor for such a kind of expensive system.
I have installed the evohome wifi (a controller, 10 HR92 valves, a gateway and a BDR91 relay box) since October but I noticed a strange behavior.
It seems that the Optimum Start feature is not working when the difference between the current temperature and the next one is less than two degrees.
For example, I have 17 degrees for the night and 18 from 7:00. In this case the Optimum Start not works (no icon on the controller before 7:00) and the Evohome is like a normal thermostat or even worst. Because it turns on the boiler at 7:00 but not at the maximum power, it continues to turn on and off every like 10 minutes more o less and the valves are open at 50% more o less (lukewarm radiator). I would expect always on with valves opened at 100 until the new temperature is reached.
This is a problem because after one hour, let say at 8:00, the temperature in that room is still 17,5 degrees.
To solve it I have to leave the temperature constantly at 18, but is not so smart...
This behavior is the same for all the rooms/areas.
As soon as the difference is higher that 2 degrees the optimum start starts (icon appears) and works fine.
I have already tried to reset the full system.
Any of you have noticed this or can make a test?
Thanks
Unfortunately, I found the official documentation really poor for such a kind of expensive system.
I have installed the evohome wifi (a controller, 10 HR92 valves, a gateway and a BDR91 relay box) since October but I noticed a strange behavior.
It seems that the Optimum Start feature is not working when the difference between the current temperature and the next one is less than two degrees.
For example, I have 17 degrees for the night and 18 from 7:00. In this case the Optimum Start not works (no icon on the controller before 7:00) and the Evohome is like a normal thermostat or even worst. Because it turns on the boiler at 7:00 but not at the maximum power, it continues to turn on and off every like 10 minutes more o less and the valves are open at 50% more o less (lukewarm radiator). I would expect always on with valves opened at 100 until the new temperature is reached.
This is a problem because after one hour, let say at 8:00, the temperature in that room is still 17,5 degrees.
To solve it I have to leave the temperature constantly at 18, but is not so smart...
This behavior is the same for all the rooms/areas.
As soon as the difference is higher that 2 degrees the optimum start starts (icon appears) and works fine.
I have already tried to reset the full system.
Any of you have noticed this or can make a test?
Thanks
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