11.2kW Ecodan in 182sqm property

RE: 11.2kW Ecodan in 182sqm property

@sand · 2021-12-11T11:10:56Z

Hi, thanks so much for all the information regards ashp, I have gained so much great knowledge. I moved into new build 3 wks ago with a ecodan 11.2, property 182sq mtrs. very well insulated. Ashp installed by developer so no input into design and very very scant handover. Basically, leave alone, in the engineers words " set it and forget it" 🙄 well he isn't paying my electricity bill! so I came to the forum to learn how to use the system efficiently and economically. So first thing was to reduce flow from 60c to 45c this reduced the cost from about £50 in first 4 days to £60 the following 7 days ( thats total electricity) now I have melcloud app I can track energy useage just for ecodan. Secondly changed water temp from 50 to 47 and from normal to eco. We keep system running 24/7 we have 7 room thermostats for ufh throughout downstairs and rads upstairs, we think they are K3 but not sure. We have a wireless controller for upstairs too. I tried to reduce the flow to 40 but the rads didn't get very warm so I a have reduced flow to 44 and going to see if that makes a difference and then reduce incrementally until we feel a change in the comfort level. I'm "nesh" is that word only used in Yorkshire 😀, so like the upstairs 20 and downstairs 21degrees. As its been such a steep learning curve ( no pun intended ) I'm leaving compenstation curve settings until weather gets a bit warmer, I understand the concept just dont know what to set it at yet. My main question is we have water tank in garage and its freezing in there do we have to insultate the water tank? Many thanks again for all great information, although at times it goes way above my head Im willing to learn.

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MarkC

(@markc)

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Joined: 4 years ago

Posts: 97

04/01/2022 3:40 pm

Posted by: @morgan

Posted by: @markc

Have you got meters installed that monitor usage and delivery?
Known as MMSP Metering and Monitoring Service Package. Or access to the MelCloud app?

@markc

Hi Mark. I don't have MMSP but I do have access to MELCloud. Although that tells me I need a firmware update but won't update for some obscure reason. Also I understand the data from MELCloud isn't at all accurate. For example the shown set temp' is 24C which is correct but it shows the actual room temp' as that or very close also which is inaccurate. The temp is set at 24C to keep the setting for weather comp' curve but the room temp is a comfortable 21/22C. It makes me wonder if the other readings are accurate.

Without MMSP I'm not sure how accurate the app will be. Yes the control area is pretty useless I agree. The MelCloud app is mainly useful for generating energy usage reports. I find it easier to use if you access it via a desktop computer/browser.

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Kev M

(@kev-m)

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Joined: 5 years ago

Posts: 1276

04/01/2022 4:34 pm

@morgan

the room temp is just the temperature where the wired in controller is located, unless you have a Mitsubishi wireless one or a remote temp sensor. Mine is in the airing cupboad and says 25C or so.

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Morgan

(@morgan)

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Joined: 5 years ago

Posts: 677

04/01/2022 5:36 pm

@kev-m

I have a Mitsubishi one but awaiting the Mitsubishi wireless receiver part to be delivered so I can get that installed. For the moment it’s a Heatmiser Neostat Air.

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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