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[Solved] How to program setback (Ecodan 5.0)

afarmery · 2023-12-08T14:59:40Z

I have a new Ecodan setup in an old granite cottage (insulated as best we can) with UFH. My installer, who claims to know everything about ASHPs, has set the system so that it comes on between 0600 and 0900. Then it's off until 1600 and then runs until 2200, then off overnight. I know this because the Tesla app tells me there's 1.1 kW of power being used at these times (and there's no other appliances on at the moment). I think I've understood from this forum that the system would be best in open loop, without thermostats or timers. That being the case, how do I 'set back' the temp overnight without relying on stats? Can I do this by programming the Ecodan to shift its heat curve by a small amount overnight? Should I diable the timers and set the stats to a couple of degrees higher than I want the temp to be? Thanks A

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Air Source Heat Pumps (ASHPs)

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Abernyte

(@abernyte)

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Joined: 3 years ago

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09/12/2023 1:51 pm

Does this give you the idea?

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Morgan

(@morgan)

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Joined: 5 years ago

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09/12/2023 2:00 pm

@abernyte that is excellent. Very helpful. Thank you so much.

Retrofitted 11.2kw Mitsubishi Ecodan to new radiators commissioned November 2021.
14 x 500w Monocrystalline solar panels.

2 ESS Smile G3 10.1 batteries.
ESS Smile G3 5kw inverter.

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Morgan

(@morgan)

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Joined: 5 years ago

Posts: 698

09/12/2023 2:12 pm

@abernyte Sorry, one more question. When setting for Room, Flow or Curve is it safe to assume that Room is Auto Adapt?

Retrofitted 11.2kw Mitsubishi Ecodan to new radiators commissioned November 2021.
14 x 500w Monocrystalline solar panels.

2 ESS Smile G3 10.1 batteries.
ESS Smile G3 5kw inverter.

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Morgan

(@morgan)

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Joined: 5 years ago

Posts: 698

09/12/2023 2:18 pm

Just found this.

Retrofitted 11.2kw Mitsubishi Ecodan to new radiators commissioned November 2021.
14 x 500w Monocrystalline solar panels.

2 ESS Smile G3 10.1 batteries.
ESS Smile G3 5kw inverter.

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Abernyte

(@abernyte)

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Posts: 259

09/12/2023 2:22 pm

Yeah, room is AA

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Mars

(@editor)

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Posts: 4474

20/02/2024 12:35 pm

@afarmery did you ever resolve the issues you were battling with? Any updates would be appreciated.

Also, what is the size (kW) of your Ecodan?

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afarmery

(@afarmery)

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Topic starter 20/02/2024 1:15 pm

@editor I didn't resolve the issue really. My system is an Ecodan 5kW. I understand that it might be possible using Melcloud (but I'd need to buy an Ecodan WiFi adapter). In the end, I just implement setback manually. I've got the curve calibrated nicely to give room temps of about 19.5. The stats are set to 21, as a temp limiter. When I go to bed I nudge the curve down by 1 or 2 degrees on the FTC6 panel, then nudge it back in the morning. Power consumption is pretty meagre and I can mostly satisfy it with my solar panels and battery.

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