I would be interested to see some power, heat-output and flow/return temperature graphs of new model Ecodan. Also interested in ‘running information’ values off the controller. Seeing how any ASHP models modulate in different conditions is always interesting. Its quite crucial to getting good eff…

Results of ‘sort of’ engineering out my low loss header… I don’t have enough data to say whether what I’ve done has actually improved performance yet, but I thought I show what can be done with a bit of Arduino hardware and some relatively simple code. My system was installed with a LLH, which I w…

@Rachel I tested this today with my local ESP32 based serial control and it looks to be more responsive than you are seeing with MELcloud. I turned off the heating at 4pm (call for heat was turned off at 16:00:16) and at 16:01:20 the home assistant climate control entity changed from heating to off…

Thanks Dan. That’s interesting, but I don;t think it’s MelCloud causing the problem, becuase I can stand in front of the FTC controller and see the setpoint change within a few seconds when i activate it from my NodeRed/HA interface via MelCloud. Maybe it just depends what the unit is doing at the …

@Rachel what are you using to control the setpoint/call for heat? Is it a 3rd party thermostat or are you controlling the ecodan directly? Here are a few space heating starts from my other system which HA controls the call for heat using a relay. The ecodan looks to start delivering heat energy wit…

This seems to be the pattern my Ecodan 8.5kW has settled into when it is colder weather when doing hot water… [image] The black line is cylinder temp. Things get going but are interrupted by a defrost and when it gets going again after everything appears fine for a while until we hit around 50 d…

When I was having particular trouble with my 6kW Ecodan, I had sensors on air-in, and air-out of the unit. As expected, when things go wrong, the air emerges no colder… as you say, how can heat output be less than power in?.. where is the heat going?? that is a puzzle. surely the air out not com…

Here is a defrost during heating [image] Looks normal?

[image] ajdunlop: This seems to be the pattern my Ecodan 8.5kW has settled into when it is colder weather when doing hot water… [image] The black line is cylinder temp. Things get going but are interrupted by a defrost and when it gets going again after everything appears fine for a while un…

I believe that the flow meter is only used for metering and data logging. You can disable the flow meter via a dip switch inside the controller. I believe you can install a separate flow switch as a safety mechanism. This doesn’t answer why your flow sensor and meter are so far apart of course. Mi…

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Anyone monitoring a new R32 Ecodan?

Hardware Heatpump