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
- 2,114 Topics
- 46.4 K Posts
- 32 Online
- 3,410 Members
Join Us!
Latest Posts
-
RE: No-code, plug-and-play monitoring for your heat pump
By Grantmethestrength , 12 hours ago
-
@eliuccio good to hear you’re happy with the install. A...
By Mars , 21 hours ago
-
RE: Is this just haze or something more?
I am not a scientist nor a meteorologist and I know the...
By Toodles , 2 days ago
-
RE: Benefits of an extra horizontal loop for GSHP
It will improve performance, but by how much depends on...
By Brendon Uys , 2 days ago
-
RE: The good, the bad and the not that great – my heat pump installation
Said I would pop back with a update. Only Mr Jesus h...
By Burtis , 2 days ago
-
RE: Buffers, hot water and cooling
Thats presumably heat pump DT, what about radiator DT a...
By JamesPa , 2 days ago
-
RE: Who's your electricity provider and what's your tariff?
@chandykris Exactly the same here. We now have 13.5kWh ...
By Old_Scientist , 3 days ago
-
Compressor and Evaporator Stratification
I have had a few issues with my Hitachi spilt heatpump ...
By trebor12345 , 3 days ago
-
RE: Wood burner with ASHP - direct air?
This depends on the size of your wood burner and size/t...
By Lucia , 3 days ago
-
RE: Difficult positioning of air source heat pump
@rikiarn It's a not a buffer it's a volumiser which is ...
By Lucia , 3 days ago
-
RE: Is your heat pump insured?
To make things clear, lots of insurance companies cover...
By Lucia , 3 days ago
-
RE: Boxt Heat Pump Installation Experience
@adrian any updates since installation? How is it perfo...
By Ashfp , 4 days ago
-
RE: Say hello and introduce yourself
Hi @seatonian - Yes, I know Seaton, and I have the Nat...
By Transparent , 5 days ago
-
@seatonian got your email. Will connect you with a reco...
By Mars , 5 days ago
-
@downfield and @toddles, this isn’t in the settings cur...
By Mars , 1 week ago
-
RE: Homely launched for Grant Aerona ASHP control
I haven't bought the Aerona Smart Controller (£700!) bu...
By Prunus , 1 week ago
-
RE: Antifreeze top up for my heat pump - is this a rip off?
For the record, Grant supply ethylene glycol for their ...
By Prunus , 1 week ago
-
RE: Compressor attempts start but fails - Nibe Fighter 2005 8kW
@skyefarmer amazing. Well done!
By Mars , 1 week ago
-
RE: Air source heat pump roll call – what heat pump brand and model do you have?
Ebac 5kw - Monobloc R32. Developed and made in UK - Mit...
By marcinwloch69@gmail.com , 1 week ago
-
RE: Is a Valliant Inline 6kW heater a BUS buster?
Just another thought - it might be worth thinking about...
By JamesPa , 1 week ago