Homematic HMIP-BWTH and heating floor at 40ºC

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soyxan
Beiträge: 1
Registriert: 14.01.2022, 10:10
System: Access Point

Homematic HMIP-BWTH and heating floor at 40ºC

Beitrag von soyxan » 14.01.2022, 10:22

Hi,

I have purchased several HMIP-BWTH wall thermostats with an Access Point to replace my old bi-metallic thermostats in each room. The HMIP-BWTH thermostats have a PWM output that will open/close a 230VAC valve connected to the thermostat output. They are working fine in manual/auto (they keep the temperature) but I have enabled the "Optimum start/stop function" and it is not working as expected.

My heat flow is around 40ºC, so my first question is how should I define my heating system in the app:
  1. Standard
  2. Low Energy
Can I tweak the system somehow to get better results?

Thanks in advance!

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mototeacher
Beiträge: 351
Registriert: 28.11.2013, 22:41
Wohnort: Idstein
Hat sich bedankt: 27 Mal
Danksagung erhalten: 24 Mal

Re: Homematic HMIP-BWTH and heating floor at 40ºC

Beitrag von mototeacher » 04.03.2022, 13:02

Hi soyxan,

in my own system I'm using WTH-2, but the control functionality should be the same.
My floor heating does have a very low temperatur delay (no floor screed above the water pipes).
My water temperature varies between 30 and 40 C.
I'm running the system in LOW ENERGY mode & Optimum start/stop and the temperatur controll works fine.
I got just issues with starting in the morning several hours too early.
Just after replacing the profile setting in the wall box several times did solve my problem.
I don't have any evidence, but it looks to me as if I had to over write the old setting a couple of times until my WTH-2 did finally accept it and was setting the temperature according my requirements.

BR,

Uli
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