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Air Source Heat Pumps (ASHPs)
Last Post by batalto 2 years ago
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 Derek M
(@derek-m)
Illustrious Member Member
Joined: 4 years ago
Posts: 4428
15/11/2021 2:14 pm  

@batalto 

I am considering using the controller - but at this moment I don't see the advantage. I am sure @heacol will come along and tell me it has many advantages I am not yet aware of.

The advantage is that you should get more precise control of the indoor temperature, without fluctuations that may be caused by solar gain and the like. Having more accurate control may then make it possible to lower the desired temperature setting slightly, which would give the benefit of reduced energy consumption.

Having said that, it is your choice at the end of the day.


   
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 batalto
(@batalto)
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Joined: 4 years ago
Posts: 1091
Topic starter 15/11/2021 2:17 pm  

@heacol the thermostat is set above the temperature in the room - so the system is just "on". Its not switching on and off at all

12kW Midea ASHP - 8.4kw solar - 29kWh batteries
262m2 house in Hampshire
Current weather compensation: 47@-2 and 31@17
My current performance can be found - HERE
Heat pump calculator spreadsheet - HERE


   
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 Kev M
(@kev-m)
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Joined: 4 years ago
Posts: 1276
15/11/2021 2:38 pm  
Posted by: @batalto

@heacol the thermostat is set above the temperature in the room - so the system is just "on". Its not switching on and off at all

same as I'm doing.  My 'stats are set to 30C, house never more than 22C


   
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 Brendon Uys
(@heacol)
Noble Member Contributor
Joined: 4 years ago
Posts: 394
15/11/2021 2:48 pm  

@batalto As a trial, that is fine, however if you want to get the best performance, you need to optimize the entire system, not only the controller. You are only doing 1/4 of the job if you are just turning the thermostat up.

Director at Heacol | Expert Heat Pump Consultant | Book a one-to-one consultation for pre- and post-installation advice, troubleshooting and system optimisation.


   
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 batalto
(@batalto)
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Joined: 4 years ago
Posts: 1091
Topic starter 17/11/2021 10:24 am  

So far so good in terms of heating - house is plenty warm. Annoyingly my app isn't working so I cant see power used vs heat delivered. I'll be calling them later to try and find out what's going on with things. It was very very helpful to understand that data

12kW Midea ASHP - 8.4kw solar - 29kWh batteries
262m2 house in Hampshire
Current weather compensation: 47@-2 and 31@17
My current performance can be found - HERE
Heat pump calculator spreadsheet - HERE


   
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 batalto
(@batalto)
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Joined: 4 years ago
Posts: 1091
Topic starter 23/11/2021 10:49 am  

Tweaked my curve last night. Went to 50@-3 and 25@17 down from -4 and 18. House is warmer today. The back room remains my largest issue, as its the hardest place to warm up. The rest of the house is very house. My child and wife also don't help matters; the former turning off one of the radiators and the latter covering everything with washing and then complaining the room isn't warming up.....

12kW Midea ASHP - 8.4kw solar - 29kWh batteries
262m2 house in Hampshire
Current weather compensation: 47@-2 and 31@17
My current performance can be found - HERE
Heat pump calculator spreadsheet - HERE


   
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 batalto
(@batalto)
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Joined: 4 years ago
Posts: 1091
Topic starter 25/11/2021 8:37 pm  

The app is still not delivering COP or any other data. @grahamh do you have any idea why the app might stop showing this? I'm not sure if it's me, or the app. Do you know anyone else who might have a Midea unit they could check? Otherwise I'm going to have to put in my own monitoring system, which is fairly costly in parts and a plumber

12kW Midea ASHP - 8.4kw solar - 29kWh batteries
262m2 house in Hampshire
Current weather compensation: 47@-2 and 31@17
My current performance can be found - HERE
Heat pump calculator spreadsheet - HERE


   
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 batalto
(@batalto)
Famed Member Member
Joined: 4 years ago
Posts: 1091
Topic starter 26/11/2021 11:40 am  

And the app is suddenly working again. Nothing logged since the 17th, but... At least it's working again

12kW Midea ASHP - 8.4kw solar - 29kWh batteries
262m2 house in Hampshire
Current weather compensation: 47@-2 and 31@17
My current performance can be found - HERE
Heat pump calculator spreadsheet - HERE


   
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Graham Hendra
 Graham Hendra
(@grahamh)
Reputable Member Member
Joined: 4 years ago
Posts: 108
26/11/2021 2:43 pm  

speak to the guys at freedom who supply all the mideas in teh country. Paul is the midea app guy he will fix it. I no longer work for freedom so cant really assist, i am not an app guy tbh. to complex for me . 

Heat pump expert


   
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 batalto
(@batalto)
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Joined: 4 years ago
Posts: 1091
Topic starter 26/11/2021 3:13 pm  

@grahamh I just know you have a lot of experience with the units themselves. The app is working again now. I don't think FHP will be much use, it seems to be a data/server issue from Midea. I imagine only they/the app development team can really fix the issue. 

12kW Midea ASHP - 8.4kw solar - 29kWh batteries
262m2 house in Hampshire
Current weather compensation: 47@-2 and 31@17
My current performance can be found - HERE
Heat pump calculator spreadsheet - HERE


   
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Graham Hendra
 Graham Hendra
(@grahamh)
Reputable Member Member
Joined: 4 years ago
Posts: 108
26/11/2021 3:15 pm  

yep the app was written by freedom, well one of them was, worth checking. im more a mechanicla and electrical guys, fluid flows my thing. i still have a honeywell mechanical stat onmy heat pump, i dont need an app. if my house is cold my wife will call me 

Heat pump expert


   
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 batalto
(@batalto)
Famed Member Member
Joined: 4 years ago
Posts: 1091
Topic starter 26/11/2021 3:18 pm  

@grahamh I have both the MSmart app and the Comfort Home app. From what I can see, they are identical. The Comfort home seems to just be a reskin of the Midea (or vice versa) - even the images are even the same in the background. The setup is also the same, it just seems to redirect data to the other app. However both had the same data retrieval fault, which leads me to believe this is a Midea server issue - the place where the data is stored.

12kW Midea ASHP - 8.4kw solar - 29kWh batteries
262m2 house in Hampshire
Current weather compensation: 47@-2 and 31@17
My current performance can be found - HERE
Heat pump calculator spreadsheet - HERE


   
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