The Efficient Home Forum

So the boiler indeed seems to send a 80 degree reply to the max CH temperature request. I am not sure why the request also has a parameter showing 80 degrees, I have to dig in the protocol probably in order to explain it to myself. The gateway app has an option for CH max tempetarure override, but ...

I'm looking at introducing a Opentherm gateway between the evohome and my Vitodens 100 to allow me to control the flow temperature manually or even possibly automatically from climate/ seasonal data. Has anyone had experience with this DIY gateway project? http://otgw.tclcode.com Having done a small...

The boiler does use different flow temperatures as per demand over OpenTherm, you just can not limit the max flow temperature using the boiler controls, it is hardcoded in the boiler at around 80 degrees exit temperature. I don't know if it would harm the boiler, but I would not worry about it too ...

I just came across this thread, and having a Vitodens 100 connected with an OpenTherm wireless bridge to to evohome, I thought I'd share my experiences: - yes, the boiler goes up to 81 - 82 degrees and that value can not be changed on the boiler (afaik), - I also reduced the maximum heating input (...

Hi, Sorry to hi-jack this thread. I have the 100-W B1KC model and the R8810A OpenTherm bridge. I'm unsure of how these two are wired together. The 100-W wiring manual shows connection ports numbered 1&2 as the OpenTherm communication. Would I be right to assume this is what the R8810A should be ...