Forums

Forums
Renewable Heating
Air Source Heat Pum...
MelCloud "Mixing ta...
 
Notifications
Clear all

MelCloud "Mixing tank temperature"

 
Page 2 / 2
Air Source Heat Pumps (ASHPs)
Last Post by Sheriff Fatman 16 minutes ago
15 Posts
6 Users
3 Reactions
74 Views
RSS
Morgan
 Morgan
(@morgan)
Noble Member Member
Joined: 5 years ago
Posts: 671
26/11/2025 3:46 pm  

@davidalgarve  I'm not sure that adding more and more 3rd party controllers is a good idea.


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.


   
ReplyQuote
 DavidAlgarve
(@davidalgarve)
Reputable Member Member
Joined: 2 years ago
Posts: 164
Topic starter 26/11/2025 3:57 pm  

@morgan No they are not controllers. They are just monitoring temperatures in various rooms in the house, to give me more idea where the Mitsu Remote Controller is best located. They give a more meaningful reading than the Tado smart radiator valves.

It is made more difficult because it is an upside down house and the two main rooms downstairs (including master bedroom) are both North facing and poorly insulated, so if I locate the controller in the South facing living room upstairs, (the room you most want stable comfortable temperatures), the downstairs will be cold.

With Set temp as 22C and wireless controller reading 20.5C this is what I have right now:

IMG E9EB3DE0BC1D 1

This post was modified 22 minutes ago by DavidAlgarve
This post was modified 19 minutes ago by DavidAlgarve

   
👍
1
ReplyQuote
 Sheriff Fatman
(@sheriff-fatman)
Estimable Member Member
Joined: 7 months ago
Posts: 84
26/11/2025 4:05 pm  

Posted by: @davidalgarve
↑

@morgan Hi Morgan.

I am struggling to keep the faith. More than a week passed and the system was learning nothing, at which point I was told that a Shelly H & T would be better than the Mitsu Wireless Controller, which had previously been said to be required.

Eventually after I decided to move the wireless controller to the coldest room in the house (our bedroom, downstairs) we saw some progress, but the target temperature of 22C was rarely met and flow temp was not as high as it might be. After buying more Shelly H & T's to spread around the house, I have chosen another downstairs room to position the wireless controller. So we are back into a learning phase and not so warm.

In addition, like you, I am getting significantly lower COP figures than previously and that is after changing the buffer tank to volumiser and deleting a pump.

I would like some relevant data to see why the disappointing performance, hence an interest in MelPump, but I can't say that I welcome using this in talking to Havenwise 

This post, on my 'diary' thread, might be of interest in providing some insight into what's available from both systems.  I've been using both to analyse what my heat pump is doing under Havenwise control, and the MelPump data is very useful in being able to analyse this.  I'm on the free trial of Mel Pump currently, and am using it as a reporting tool only via a guest login to MelCloud set up for the purpose.

https://renewableheatinghub.co.uk/forums/postid/53010/

 


130m2 4 bed detached house in West Yorkshire
10kW Mitsubishi Ecodan R290 Heat Pump - Installed June 2025, currently running via Havenwise.
6.3kWp PV, 5kW Sunsynk Inverter, 3 x 5.3kWh Sunsynk Batteries
MyEnergi Zappi Charger for 1 EV (Ioniq5) and 1 PHEV (Outlander)


   
ReplyQuote



Page 2 / 2
Forum Jump:
  Previous Topic
Next Topic  

Currently viewing this topic 5 users ( Morgan, trebor12345, Sheriff Fatman, downfield, DavidAlgarve ) and 17 guests.

Recently viewed by users: IaAck 4 minutes ago, Majordennisbloodnok 13 minutes ago.

Share:

Join Us!

Podcast Picks

Latest Posts

Click to access the login or register cheese
x Powerful Protection for WordPress, from Shield Security
This Site Is Protected By
ShieldPRO →