OTGW: Configure Minimal ControlSetpoint / issue with 5.2 FW
Posted: Sat Jan 22, 2022 9:22 pm
Hi Schelte,
It would be great if it becomes possible to configure a minimum ControlSetpoint.
I have the impression (from gathering.tweakers.net/forum/list_messa ... es/2027810) some thermostats and/or boilers do have an option to configure a minimal CS value, e.g. 40 degrees. Mine (Evohome and Remeha Avanta) doesn't have such option. If Evohome isn't asking heat it sets CS=10, if it's asking heat it can request as low as 32 degrees but in my setup 32 degrees is reached very quickly and the boiler is going to wait until the temperature goes lower than 32 degrees and the return temperature is again lower than the Boiler temperature. With CS=40 this works much better. I did manipulate the CS value with my HA system: if CS is between 10 and 40 I put CS=40 and after 10 minutes CS=0 to check if the Thermostat does still request heat. I did upgrade to FW 5.2 but did downgrade again due to the new timer to reset CS after 1 minute. This would all be solved and direct controlled by the OTGW if it becomes possible to set a low boundary for CS.
P.S.: Thanks for maintaining this great project for already such a long time; I'm using the OTGW already for more than 10 years! In this period I improved the isolation of my home, changed thermostat (Evohome with 8n zones) and replaced my CV by a Remeha Avanta 28C to be able to use much lower temperatures in preparation of a heat pump. It's much more complex to run the system optimal with (very) low heat demand compare to high demand but I like to see this season if I can heat (every room in) my house with temperature of max 45 degrees to be sure I will not get problems installing a heat pump.
It would be great if it becomes possible to configure a minimum ControlSetpoint.
I have the impression (from gathering.tweakers.net/forum/list_messa ... es/2027810) some thermostats and/or boilers do have an option to configure a minimal CS value, e.g. 40 degrees. Mine (Evohome and Remeha Avanta) doesn't have such option. If Evohome isn't asking heat it sets CS=10, if it's asking heat it can request as low as 32 degrees but in my setup 32 degrees is reached very quickly and the boiler is going to wait until the temperature goes lower than 32 degrees and the return temperature is again lower than the Boiler temperature. With CS=40 this works much better. I did manipulate the CS value with my HA system: if CS is between 10 and 40 I put CS=40 and after 10 minutes CS=0 to check if the Thermostat does still request heat. I did upgrade to FW 5.2 but did downgrade again due to the new timer to reset CS after 1 minute. This would all be solved and direct controlled by the OTGW if it becomes possible to set a low boundary for CS.
P.S.: Thanks for maintaining this great project for already such a long time; I'm using the OTGW already for more than 10 years! In this period I improved the isolation of my home, changed thermostat (Evohome with 8n zones) and replaced my CV by a Remeha Avanta 28C to be able to use much lower temperatures in preparation of a heat pump. It's much more complex to run the system optimal with (very) low heat demand compare to high demand but I like to see this season if I can heat (every room in) my house with temperature of max 45 degrees to be sure I will not get problems installing a heat pump.