Heating curve
Re: Heating curve
I wander ... how does exactly Netatmo thermostat know outdoor temperature? Does it uses Internet as a source? Or it uses also Netatmo Weather Station if it exists?
Re: Heating curve
I think it's the same with mine. I have settled my heating curve to 1,1 and when it was colde outside, my boiler was working all the time, and it was very good.
Now since a few days, it's less cold outside. And instead of decrease the temperature, the thermostat put the boiler on less, with the same temperature, that's mean temperature inside my house is less regular.
I really expect it's a bug, because it's not the working I was looking for !
Now since a few days, it's less cold outside. And instead of decrease the temperature, the thermostat put the boiler on less, with the same temperature, that's mean temperature inside my house is less regular.
I really expect it's a bug, because it's not the working I was looking for !
Thermostat modulant - version logicielle interne 6
Relais - version logicielle 22
3 vannes - version logicielle 89 - priorité ECO
Station météo V4 version logicielle interne 200
Module extérieur version logicielle interne 52
Relais - version logicielle 22
3 vannes - version logicielle 89 - priorité ECO
Station météo V4 version logicielle interne 200
Module extérieur version logicielle interne 52
Re: Heating curve
Can everyone try to find the diagnostics menu of their boiler to see what flow temperature the thermostat is commanding for various outside temperatures.
It would be good to have data from multiple sources.
If my boiler shows this information, I expect others would also.
It would be good to have data from multiple sources.
If my boiler shows this information, I expect others would also.
Re: Heating curve
It's simple. The flow temperature is always the same : 50° to increase two degrees from night to day, 45° to maintain day temperature, if it's 10° degrees outside or -5°.
Thermostat modulant - version logicielle interne 6
Relais - version logicielle 22
3 vannes - version logicielle 89 - priorité ECO
Station météo V4 version logicielle interne 200
Module extérieur version logicielle interne 52
Relais - version logicielle 22
3 vannes - version logicielle 89 - priorité ECO
Station météo V4 version logicielle interne 200
Module extérieur version logicielle interne 52
Re: Heating curve
How strange it is ... Today, the boiler temperature was lower. The morning, between two and three degrees less. In the afternoon, it falled at only 32° Not enough to maintain my 21°, falling to 20,6°. A few hours later, the boiler grown up to 47° to reach 21° in the house, and then return to 32°. Very very strange
Thermostat modulant - version logicielle interne 6
Relais - version logicielle 22
3 vannes - version logicielle 89 - priorité ECO
Station météo V4 version logicielle interne 200
Module extérieur version logicielle interne 52
Relais - version logicielle 22
3 vannes - version logicielle 89 - priorité ECO
Station météo V4 version logicielle interne 200
Module extérieur version logicielle interne 52
Re: Heating curve
Today, I observed different values. Outside temperature was -1 degrees.
0.3 - 21
0.4 - 22
0.5 - 24
0.6 - 27
0.7 - 30
0.8 - 33
0.9 - 36
1 - 39
1.5 - 53
2 - 66
I added the blue dots on the chart
0.3 - 21
0.4 - 22
0.5 - 24
0.6 - 27
0.7 - 30
0.8 - 33
0.9 - 36
1 - 39
1.5 - 53
2 - 66
I added the blue dots on the chart
- Attachments
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- curve 3.PNG (650.17 KiB) Viewed 1748 times
Re: Heating curve
From my part, I think this day was the day where my thermostat calculated its optimisation (every two weeks if I well understand). I had to upgrade my heating curve from 1,1 to 1,2 because it was too low.Le-Steph wrote: ↑05 Feb 2023, 02:47 How strange it is ... Today, the boiler temperature was lower. The morning, between two and three degrees less. In the afternoon, it falled at only 32° Not enough to maintain my 21°, falling to 20,6°. A few hours later, the boiler grown up to 47° to reach 21° in the house, and then return to 32°. Very very strange
Today, outside temperature is really different between night and day. And It seems that boiler temperature is changing as well. Let see the next days how it works.
Thermostat modulant - version logicielle interne 6
Relais - version logicielle 22
3 vannes - version logicielle 89 - priorité ECO
Station météo V4 version logicielle interne 200
Module extérieur version logicielle interne 52
Relais - version logicielle 22
3 vannes - version logicielle 89 - priorité ECO
Station météo V4 version logicielle interne 200
Module extérieur version logicielle interne 52
Re: Heating curve
We can't possibly set the heat curve properly if we don't understand how it works.
I need 28-31 degrees flow temp. and since the values were always constant for me 28 at 0.3 and 31 at 0.4, I was ok with that.
But yesterday it jumped to 22 at 0.3 so the boiler never turned on the flame and the home didn't warm up.
Until we have more details about how the algorithm and the heat curve work, I'm going to resort to a fixed temperature by setting a high heat curve and limit the max flow temperature from the boiler diagnostic menu.
I need 28-31 degrees flow temp. and since the values were always constant for me 28 at 0.3 and 31 at 0.4, I was ok with that.
But yesterday it jumped to 22 at 0.3 so the boiler never turned on the flame and the home didn't warm up.
Until we have more details about how the algorithm and the heat curve work, I'm going to resort to a fixed temperature by setting a high heat curve and limit the max flow temperature from the boiler diagnostic menu.
Re: Heating curve
I've recently installed a Smart Modulating Thermostat with a Viessmann Vitodens 100-W.
The boiler reports the flow temperature setpoint through wifi, I have it charted. It doesn't change at all. With heating curve setting of 0.9 it was set to 38 degrees, when I set the curve to 1.0, the flow temperature is set to 40 degrees. External temperature changed between 5 and 17 degrees while I was monitoring, it doesn't seem to affect the flow temperature.
The boiler reports the flow temperature setpoint through wifi, I have it charted. It doesn't change at all. With heating curve setting of 0.9 it was set to 38 degrees, when I set the curve to 1.0, the flow temperature is set to 40 degrees. External temperature changed between 5 and 17 degrees while I was monitoring, it doesn't seem to affect the flow temperature.