Last seen: Apr 19, 2025
@clockworks if you could post the hourly temp plots rather than the last 24 hour ones they will have all the detail that should match your other plots
I would give the Mitsubishi customer help line a call, the manual does say if you want to get max flow you will need to install an additional pump, se...
If you post Melcloud graphs its worth clicking off all the other series you don't need, like set tank temp, this allows the plots to rescale to the da...
If you want to use auto adapt then you will either need to get the main controller sited somewhere where it can get a good temperature reading or as ...
With your increased curve and increased OAT (outside ambient temp) it was still trying to run around 38C. Between 1.40 and 3.40 you have the same cy...
@sunandair Clockwork means DT25 of the rads at design flow of 45C vs a room temp of 20C or thereabouts
@clockworks Higher flow temps will get less cycling but at the cost of efficiency and you will find then it will run for a couple of hours and then re...
@clockworks I wouldn't change the flow temp yet, try and see if its any better at 38C if you drop the flow temp cycling is only going to get worse any...
The flow wasn't massively out, I'm no heating engineer but a heat pump needs constant flow, so the differential flow setting doesn't seem right and th...
Can you post a picture of your LLH how much volume does it have? What is the flow speed in your primary circuit, go to service menu, running informa...
You are correct primary is the top right from the heat pump, secondary pumps round the rads you can’t break anything by turning them down. Turn prim...
- 22 Forums
- 2,037 Topics
- 44.4 K Posts
- 35 Online
- 3,250 Members
Join Us!
Trusted Installers
Struggling to find a reliable heat pump installer? A poor installation can lead to inefficiencies and high running costs. We now connect homeowners with top-rated installers who deliver quality work and excellent service.
✅ Verified, trusted & experienced installers
✅ Nationwide coverage expanding
✅ Special offers available
Latest Posts
-
RE: The Rise and Fall of Europe’s Most Generous Green Subsidy
This is where the cold water storage tank was situated;...
By Dwynwen , 3 hours ago
-
RE: Help with understanding my Mitsubishi Ecodan air source heat pump
@majordennisbloodnok, the same thought occurred to me, ...
By Morgan , 3 hours ago
-
RE: Help me keep the faith with my air source heat pump installation
I agree with @mars. My install was not dissimilar. ...
By JamesPa , 3 hours ago
-
RE: Air Source Heat Pump - Side Alley Suitability
Thats probably fair enough. The degree-days calculatio...
By JamesPa , 4 hours ago
-
RE: ASHP Ecodan L9 error - No Heating but Hot Water
That’s interesting, but obviously concerning also…. Do ...
By SUNandAIR , 20 hours ago
-
RE: In the middle of an ASHP installation - a few questions (and issues)
Thank you @robs - that very useful data. The issue wa...
By Transparent , 24 hours ago
-
RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's
@trebor12345 The Auto function is supposed to adapt au...
By Heatgeek , 2 days ago
-
RE: The Great British Heat Pump Quiz
@allyfish thanks for the feedback and glad it was fun! ...
By Mars , 2 days ago
-
RE: help sizing rads based on room by room heat loss
If its 1988W at DT 50, which is how most radiators are ...
By JamesPa , 2 days ago
-
RE: Career change – entering the world of heating and heat pumps
@editor Mars, thank you. That's along the routes I was ...
By Lakey , 2 days ago
-
@editor thanks Mars, it's a rare occasion I'm looking f...
By big_si , 3 days ago
-
RE: Efficiency Concerns on newly installed Mitsubishi Ecodan 8.5kW
@ashp-bobba and @jamespa - thank you both for all your ...
By CBrenewable , 3 days ago
-
-
Win one of five "Heat Pumps 101" Courses
Heat pumps are gaining traction in the UK, but between ...
By Mars , 3 days ago
-
RE: Agile: average import cost vs other tariffs?
@toodles thanks for the analysis. I'll be really intere...
By Old_Scientist , 4 days ago
-
RE: Is this normal? Click of the DHW returning to space heating
@grantmethestrength Oh sorry to hear that, there should...
By ASHP-BOBBA , 4 days ago
-
@ashp-bobba TBH the ladies are rather disorganised, so ...
By Cathyem1 , 4 days ago
-
RE: Solar Power Output – Let’s Compare Generation Figures
And for those of us without an automatic irrigation sys...
By Majordennisbloodnok , 4 days ago
-
Logically, the lower frequency = more gentle, yes, but ...
By SUNandAIR , 4 days ago