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emsesp / EMS-ESP

ESP8266 firmware to read and control EMS and Heatronic compatible equipment such as boilers, thermostats, solar modules, and heat pumps
https://emsesp.github.io/docs
GNU Lesser General Public License v3.0
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boiler : "ELM LEBLANC MEGALIS CONDENS GVA C 21-5MN" #753

Closed guillaume042 closed 3 years ago

guillaume042 commented 3 years ago

hello,

For this boiler :

Debug Log for heatingactivated : heatingactivated.txt

Debug Log for flowtemp :
show cmd flowtemp opening warm water in the bathroom show flowtemp.txt

guillaume042 commented 3 years ago

Same thing ? https://github.com/emsesp/EMS-ESP/issues/524#issuecomment-700980192

MichaelDvP commented 3 years ago

I don't know your boiler, but i think it's something similar. On my boiler i have this control-panel: grafik It has a mechanical rotary control and if the right control is on, then heatingactivated is on. If i try setting it to off via ems, a few seconds later the controler (device_id 0x09) sends a on again. Also for flowtemp, only if the rotary is set to "auto" a flowtemp-command to the boiler is not overwritten. You can check with log all the ems commands setting the value back.

guillaume042 commented 3 years ago

Here is mine : 20210316_115148

So i'm lost ? nothing to do ? I got to add a thermostat ?

Regards

MichaelDvP commented 3 years ago

I think with the mechanical controls it's the same for heatingactivated, you can not send off if the knob is in on positions. A thermostat also can not set off, it sends flowtemp 0 to switch heating off.

A change in flowtemp for dhw is normal, the boiler sets for warm water a flowtemp of wwsetpoint+wwflowtempoffset and after preparation set the flowtemp back to heating. If you want to change the flowtemp for heating you have to send periodically, that's also what a thermostat do.

guillaume042 commented 3 years ago

I think with the mechanical controls it's the same for heatingactivated, you can not send off if the knob is in on positions. A thermostat also can not set off, it sends flowtemp 0 to switch heating off.

A change in flowtemp for dhw is normal, the boiler sets for warm water a flowtemp of wwsetpoint+wwflowtempoffset and after preparation set the flowtemp back to heating. If you want to change the flowtemp for heating you have to send periodically, that's also what a thermostat do.

Thank you SO much for your precise answer !

So basicly the idea is to put flowtemp to 0 to cut the heating. As it is overwritten, i can juste check when tapewater is on, waiting for it to be back off and then putting back flowtemp to 0.

Another question if you don't mind : should i work on others parameters to optimize heating ? I've got 6 rooms with T° sensors and smart thermostatic on each heater.

Regards

MichaelDvP commented 3 years ago

should i work on others parameters to optimize heating ? I've got 6 rooms with T° sensors and smart thermostatic on each heater.

I think there is no correct answer to this. The thermostats normally do a) measure outdoortemperature and calculate flowtemp or b) measure roomtemperature in one reference room (the one with the highest heat requirement) with all radiator/floor-thermostats fully open in this room, control flowtemp to have this room at setpoint, all other rooms are throttled by the radiator/floor-thermostats. or c) a mixture of both modes, calculate flowtemp as a), but correct it a bit if reference room gets to cold/hot.

All methods are not optimal. For instance with b) if sun shines in the windows of your reference room, the other rooms cool down to much. Maybe you can create a algorithm with all your smart-thermostats to check all positions and control the flow temp the way that always only one radiator/floor-thermstat is fully open. But remember that heating control is slow and roomtemperature reaction to flowtemp-change is much later.

proddy commented 3 years ago

closing. please re-open if you have further questions or need help