Keystone COPs? I'm not getting the efficiencies I expected on my Ecodan.
Posted by: @morganI assumed it to be obligatory.
Thank God we haven't reached that state of coercive healthism yet, though it has to be said that that blasted pandemic and worse, the authorities response to it, moved us closer to such a terrible state of affairs. For the ordinary housegolder, choice over such things, at least for now, is 100% yours, just as you can choose whether to accept a doctor's treatment or not, you can choose whether to run a Legionella cycle or not. I should mention the situation is different in rental and commercial properties, primarily because of duty of care obligations, but also because commercial properties are inherently more at risk.
It is not for me to make individual recommendations, but I can certainly point out that the case for domestic hot water Legionella cycles if far from cut and dried. Google it, or start here with the Heat Geek:
https://www.heatgeek.com/hot-water-temperature-scalding-and-legionella/
Midea 14kW (for now...) ASHP heating both building and DHW
Posted by: @sunandairIt’s fascinating how how even Heatgeek hovers on saying the risks are very low but,
As you posted that, I was writing a post with a link to his post on Legionella. It is a good post, well researched, considers most eventualities, includes scalds and burns risks, and best of all totally avoids coercive healthism ie he concludes it is a matter of individual choice.
It is extremely dangerous to allow the state to make individual health decisions.
Midea 14kW (for now...) ASHP heating both building and DHW
@cathoderay I'm not going to go into a discussion as to the governments, around the world, reaction to Covid. Nor do I intend a lengthy and rather pointless discussion as to the extreme danger of others looking out for ones health. My thoughts are based upon my assumption that the Legionella cycle is obligatory as part of the MCS certification and RHI payments being tied into that certification. I was not addressing the possibilities of government conspiracy to control the masses. It was a very simple throw away comment/question.
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.
Another way I thought of checking efficiency was how long the DHW reheat took. Since there are less chances of cycling etc.
So I set up a forced DHW reheat at 9.12am today here is the hourly graph reading
Set temp/target was 48c starting at 38c. Coincidentally it appears to have taken 38minutes to reach the target temperature (9.50am). The HP was working on room heating before the test and reverted back to room heating at the end.
HP Ecodan 8.5kw, tank capacity 250L, bespoke construction, deltaT 6, flow rate 13LPM. I guess if I had a MID meter I would also know energy consumption.
Addendum : I also have a thermistor at the top 300mm of the tank so even though the mid sensor which controls the heat pump read 48c the temperature at the top was 56c. This extra sensor is part of our solar temp difference controller, not part of the Ecodan.
Posted by: @sunandairThis extra sensor is part of our solar temp difference controller, not part of the Ecodan.
Interesting, do you have more than one temperature sensor input into the solar thermal controller?
My temperature sensor is in the bottom 1/4 of the tank measuring the temperature of the water around the solar coil, and triggering when the dT is 10 or greater.
@william1066 yes there’s are three sensors in total but only 2 are needed to activate the pump for the solar circuit.
one is mounted in the roof top manifold (LWT) and the other is mounted at the cylinder heat exchanger at the bottom of the tank. When there is a 5c temp difference the controller activates the pump. But the third one is mounted for information purposes at the top of the tank and displays the temperature on the display.
This spare thermostat has been handy to compare Ecodan readings by placing it alongside primary flow and return etc.
(edit: pump activated when 10c difference shows and runs until below 5c or less)
- 22 Forums
- 2,073 Topics
- 45.5 K Posts
- 41 Online
- 3,351 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: Commencing on an ASHP Installation Process
I think therein lies the problem. Ratio of quotes to i...
By JamesPa , 3 hours ago
-
RE: Why Your MCS-Certified Installer Might Not Be As Competent As You Think
Hive and most other smart thermostats don't play well w...
By JamesPa , 5 hours ago
-
RE: Enabling WiFi: Samsung ASHP on Smart Things App
Thanks for the input. I've been running various experim...
By Grahamh-uk , 5 hours ago
-
RE: Radiators downstairs are cooler at the bottom after ASHP install
@melonbuffet Hi, this sounds great is you are getting 5...
By ASHP-BOBBA , 8 hours ago
-
RE: 5 Star Service from Havenwise
... a mode of operation which increases losses due to p...
By Transparent , 8 hours ago
-
RE: Ripped Off: How UK Homeowners Are Paying Gas Prices for Wind Energy
I believe there's another reason that network upgrades ...
By Transparent , 1 day ago
-
RE: What’s the modern take on advised types of insulation?
@jeff I am sorry @jeff if I have misunderstood what you...
By Toodles , 1 day ago
-
RE: Getting the best out of a heat pump - is Homely a possible answer?
@editor Cobbler’s Mantra that!
By Toodles , 1 day ago
-
RE: Renewables & Heat Pumps in the News
Australia Blue, the first wind farm in Western Victoria...
By Morgan , 2 days ago
-
RE: Flow rate discrepancy between ASHP and manifold
That's useful thanks, I hadn't seen that table before. ...
By AshRolls , 3 days ago
-
In principle I agree, @johnmo, but with provisos. The...
By Majordennisbloodnok , 3 days ago
-
RE: Heat pump installation and BUS Grant timings
@jamespa Thats how I understood it too. 🙂
By ASHP-BOBBA , 3 days ago
-
RE: Antifreeze top up for my heat pump - is this a rip off?
@sallyl That sounds about right if they are re-filling ...
By Brendon Uys , 3 days ago
-
I wouldn't be so sure about that. Heat pump designers ...
By JamesPa , 4 days ago
-
RE: Jokes and fun posts about heat pumps and renewables
@toodles they're a rowdy bunch!
By Mars , 4 days ago
-
RE: Home energy storage & battery register
@jamespa To a certain extent, by exporting to the grid ...
By Toodles , 5 days ago
-
RE: Forum updates, announcements & issues
@editor Fairy Nuff Mars, I doubt that my ramblings woul...
By Toodles , 6 days ago
-
RE: Confusion about heat pump sizing
We’ve published a deep dive into heat pump sizing, and ...
By Mars , 6 days ago
-
We’ve published a deep dive into heat pump sizing, and ...
By Mars , 6 days ago