Recent content by PhilT246

I've just spoken to Nest support and they have stated that the "Nest does not support hot water with an OpenTherm system boiler". They suggested I get a different controller. I asked them to open an enhancement request (Software change) and also state clearly here...

100% agree. I have asked https://support.google.com/googlenest/thread/22111592?hl=en but Google seem more concerned about which country I'm in....

The weather comp wiring takes me deeper into the rabbit hole... It's unlikely I'll ever use weather comp so your statement above puts me back to trying to understand the logic that's built into the boiler when switched live HW and OpenTherm CH are used at the same time. I might return to pure...

The manual seems to imply that SL1 IN is for CH and SL2 IN is for HW (https://idealboilers.com/uploads/documents/logic-system-s-installation-and-servicing.pdf page 34) The LCD display seems to reflect this too: I fear that we're not getting to the right people at Ideal who actually know how...

I like that idea, it's a potential solution.

Thanks shambolic. I'm not using weather comp. Is this response intended for this thread? What I was looking to have was CH and HW using OpenTherm. I wired it all up and used the Nest Heat Link outputs for CH and HW to operate the vales only. The only connection to the boiler was using...

I come from an IT background and it's not uncommon that "standards" are partially implemented or are extended beyond their documented spec either due to only implementing what you need or innovating beyond what's there today.

Sorry fezster. I did try that as it was the original configuration. It didn't boost when then HW was on, hence why I went down the rabbit hole

Hi Dan, If you get a few minutes, could you take a look at this thread please in case you have solved this https://www.diynot.com/diy/threads/nest-3rd-gen-ideal-logic-system-30.534686 Seems like you did something here (https://www.diynot.com/diy/threads/intergas-opentherm-and-nest.478222/) but...

I think I've found a potential way to achieve OT CH and SL HW (Excuse the crude diagram) By using a couple of relays; when there is a call for HW, the relays close the OpenTherm loop at the boiler (Boiler then thinks there is no OpenTherm control). When HW is off, OpenTherm is connected to...

In the meantime I have rewired so that it's not using OpenTherm. CH and HW call for heat are going to SL 1 and SL 2. I'm pretty sure that the call for HW is causing the boiler to heat the water to a higher temp than the the call for CH. I'll do some more testing as I don't feel confident in...

I managed to speak to someone at Ideal today who relayed answers to my questions: 1. What's the difference between SL1 In and SL2 IN? Answer : There is no difference. 2. Can OpenTherm be used for CH and SL2 IN for HW? Answer : Not recommended as it might confuse the boiler. 3. Why do you...

Thanks for the quick replies. Here (https://support.google.com/googlenest/answer/9259578?hl=en-GB) it says the 3rd gen Nest will work with "Separate hot water tank with On/Off control". The Nest also allows you to set CH == OpenTherm and HW == ON/Off. This lends itself to solution 3, if the...

First post for me and chose to ask here as you seem to be a helpful bunch of people with queries like mine. Here's the state of play... 1. CH and HW was controlled with a timer. S Plan with HW tank. 2. I installed the Nest based on several days of research, tracing wiring and input from...