I know we were chatting about whether the “Force” mode for DHW on the Ecodan was making it less efficient. I can’t for the life of me find it amongst the threads this evening. There is so much wonderful conversation going on. So I’m giving up and posting a new thread, sorry. Here is my system runni…

[image] MyForest: I can’t for the life of me find it amongst the threads this evening. [image] Improve efficiency: Turn the heat pump off Heatpump Sorry to dig up an old part of the thread here, but I discovered something in my experimentation that it may be helpful…

I’ve not had chance to play with this myself, but one thought I had is that the FTC might override “Eco” mode if the heating system is calling for heat at the same time. Just a guessing.

[image] Timbones: might override “Eco” mode Yep, that’s possible. We won’t find out in about 15 minutes because my “cheap overnight” hot water run isn’t going to kick in because the water is already hot. I’ll keep an eye out for it happening. As you know already, in the controller it does ta…

[image] MyForest: I can’t for the life of me find it And of course @Timbones comes to the rescue, thanks Tim.

I have to report a user complaint. Mostly because they don’t happen very often. Apparently the shower wasn’t hot enough this morning. That’s because I had stopped doing my “force it on during the night” run. The bottom of the tank had dropped to 31 °C by noon. [image] I was just pondering alteri…

Here’s my first run with the behaviour Tim was after, there was no call for space heating. This is re-heating the tank after a single shower. [image] As usual, it took about 20 minutes. The max power was 3.5kW rather than 5kW when using the force. The max flow temperature was 48 °C rather than…

[image] MyForest: I’ll keep running in not-force mode to see what happens. Any conclusions so far? I’ve just reconfigured my system to do the same experiment.

Yes, but I’d like to run for a few more weeks. So far space heating has been markedly better, but DHW hasn’t.

Would be interested in what settings you are using? Watching this thread to see if I can steal shamelessly:)

OK, back at a computer now :slight_smile: Slowing the flow in my system from 5 to 3 in the FTC5 seems to have made things better. Slowing it to 1 caused it to cycle dramatically because it couldn’t get rid of the heat. As you can see, this has only been changed whilst it’s warm (early March) so it…

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Ecodan Eco Mode for DHW versus Force

Hardware Heatpump

Timbones (Tim) 4 March 2023 23:39 2