Manual method to calculate the minimum_setpoint value.

[sergeantd83]

1. Set Maximum Setpoint to 45 ( SAT → Configure → General → Maximum Setpoint )
2. Set your thermostat setpoint to 25 or to a setpoint that is unreachable.
3. Monitor your relative modulation level until stabilizes to a specific value and record this value.
   Note: Your relative modulation must be above 0%. If relative modulation is still 0% use higher value in step 1.
4. Use this formula: (( 100 - recorded relative modulation ( step 3 ) ) / 100) * 45 ( step 1 ) ) and record the result.
5. Delete your current SAT instance and re-add SAT. Then in the Calibrate System card choose the option Manually enter the overshoot protection value and enter the step 4 recorded value.

Your system probably will overshoot during this manual calibration procedure but it is crucial for the correct SAT operation.

[dexterionut]

My room temperature is already close to 25°C (I usually keep my thermostat at 24.5°C). What value should I be using for step 2 and how does this affect the formula? - there is no mention about step 2 in it.

[sergeantd83]

You need to lower the heating curve coefficient. Even at night SAT overshoots. Try 0.2 lower coefficient than the present setting.

[sergeantd83]

Which value did you set as Overshoot protection value during initial configuration?

[sander593]

Alright, I lowered it 0,2 and will monitor it for a day.
The OPV is at 50 but it could be lower

[sergeantd83]

After examining again the first graph, I found a bug that we have when the CS is too low. That explains the reported behavior. When we will solve it, I will let you know!

[sander593]

Awesome, thank you!