The thermostat is set at 21.5 degrees and the house is being held at 21 and has been for over 24 hours.
Good morning Batalto,
Very useful data.
As a check, try increasing your thermostat setpoint to say 23C and see if the indoor temperature increases. If it does then your system is not fully operating on weather compensation.
You could try make the slope of your weather compensation shallower, by changing the left hand end to 50C @ -10C.
Don't change the slope immediately, increase the thermostat setting and wait several hours or more to see the effect.
@kev-m actually I used LESS power. You can see from below the details of the days.
And of course as soon as I said it, I was wrong. My heating got the house to 21.5, so I've adjusted the weather curve down a tiny bit from 25@20, to 25@18. I'll wait to see the impact. Also yesterday I adjusted the hot water from 55 to 53 and that seems to be fine as well. Its not perfect as ambient is an average of the whole day - It could have been a cold night and a warm day and still average 13 vs 13 all day. However for my needs its close enough to be interesting.
@derek-m It doesnt matter what I set the thermostat to. Originally I had it on 22, but moved it to 21.5 to prevent a boiling house if the experiment went totally wrong. So far my nest app says the heating was being called for "23.5 hours" yesterday. It is showing 21 steady in the house downstairs. I've left upstairs on normal thermostat as its so warm up there anyway its not really ever on. When it does come on, it warms up pretty quickly.
Checked the filter today and it was pretty much totally clean - so I think the gunk is now cleaned out. The system is basically silent now as well, whereas before it made a high pitched noise in the main return pipe. I assume this was just a restricted flow issue.
House seems to be totally fine today, however the temps seem to creep up in the day. Now evening has come it's back to holding at 21. Not sure what to do as it seems to be a solar gain issue. However it wasn't a major issue as it was only 0.5° above target. A stated I've adjusted my curve a little bit. I'll be leaving it alone for the next few days and seeing the impact. However any tweaks will be around the edges.
Current setting 50°@-3° and 25°@18°
room temperature hit 21.5 again today, so trimmed the weather comp at the bottom end a little. Its not exactly sunny, so solar gain should be negligible today. Now the house is up to temperature it'll be interesting to see how it holds. slowly slowly dialling in. Just need a cold snap to see how we are really getting on
we're a tiny bit cooler indoors today on the same flow temps. I think it's because it's damps and misty. Not enough to worry about though. Like you say, this is too easy, we need some proper winter weather.
Ran through the night with a COP of 4.2 - Lost some heat downstairs though, the temperature dropped to 20. So I've adjusted my curve 1 degree upwards; 25 @ 17
Posted by: @bataltoRan through the night with a COP of 4.2 - Lost some heat downstairs though, the temperature dropped to 20. So I've adjusted my curve 1 degree upwards; 25 @ 17
Good morning Batalto,
The wind speed was higher last night in our area, and I have noticed that it appears to have added about 5C to the required water flow temperature.
@derek-m there is a bit of cycling on the system due to the super mild weather (ambient was 13 overnight). However its very wet today, so interesting to see how we get on. The house is well up to temperature now.
@kev-m It'll be a mix of hot water (for the showers), my wife's hair dryer, washing machine going on etc. This measures power in 5 min intervals, so its prone to being a bit spikey. You think 2/3kw for hot water being heated plus a 2kw hair drier and you're getting up there. Interestingly I am still running on battery, so my power is still 5p/kw
SOC = State of charge e.g. %
- 26 Forums
- 2,228 Topics
- 49.5 K Posts
- 188 Online
- 5,890 Members
Join Us!
Podcast Picks
Latest Posts
-
RE: Renewables & Heat Pumps in the News
That Octopus/Lloyds announcement screams ETHICS at me. ...
By Transparent , 45 seconds ago
-
RE: How good is the app support for your heat pump?
The Academy of Motion Picture Arts and Sciences stipula...
By Transparent , 29 minutes ago
-
RE: Help me keep the faith with my air source heat pump installation
I feel like ive been moved. Whilst it’s easy enough for...
By AdamK , 59 minutes ago
-
RE: Electricity price predictions
I would hazard a guess that it has not been analysis pa...
By Batpred , 1 hour ago
-
RE: Rate the quality of your heat pump design and installation
Octopus - Daikin Altherma 3M 4KW heat pump install - Ap...
By bimbleuk , 2 hours ago
-
RE: Samsung Heat Pump – Can't Activate TW2 Pipe Sensor (for Delta T Control)
@bubuontheweb thanks for the update. There are a lot lu...
By Mars , 3 hours ago
-
RE: Renewable Heating Hub Homeowners' Q&A Podcast
@lucia, I appreciate the feedback, and we’ve received a...
By Mars , 3 hours ago
-
RE: Grant 13kW Aerona3 - issues getting zones to temp
I hope out of all of this that I can run the system at ...
By Crimson , 3 hours ago
-
RE: Air source heat pump roll call – what heat pump brand and model do you have?
Daikin Altherma 3M - 4kW (R32 2022 Release) (EDLA04E2V3...
By bimbleuk , 4 hours ago
-
RE: Twin 10kw Grant Aerona Volumiser Tanks using lots of power
The Grant Aerona3 external volumisers are insulated uni...
By Grantmethestrength , 13 hours ago
-
RE: Replacing knackered oil boiler with ASHP - Perthshire
Where to start? In brief we are happy with the system...
By DowallyDrifter , 14 hours ago
-
Question about Heating Pump Operation mode – Ecodan FTC6 v20.06
I have a Mitsubishi Ecodan EHST20D-YM9D with PUHZ-SWM80...
By Johj45 , 14 hours ago
-
RE: How to increase DHW water temperature on Samsung Gen 6 Control Panel
Im just in the process of connecting up my mixergy cyli...
By bontwoody , 22 hours ago
-
Unless anyone can tell me differently, there appears to...
By DowallyDrifter , 1 day ago
-
RE: Should Our Water Circulation Pump Be Configured to Run All The Time?
I run my Vaillant on either expanded mode (either end o...
By JamesPa , 1 day ago
-
-
RE: New Fogstar 15.5kWh upright solution
From my experience with inverters from different Far Ea...
By Transparent , 2 days ago
-
@bontwoody Thank goodness you are ‘back on-line’ so to ...
By Toodles , 2 days ago
-
RE: Automation options to maximuse efficiency & ToU tariffs
@majordennisbloodnok Seems reasonable. It would be m...
By Batpred , 2 days ago
-
RE: Havenwise App Help & Forum Support – Get the Most from Your Heat Pump
@hcas OK Thanks. Will do.
By bontwoody , 2 days ago