16KW Samsung help!
Hi everyone, new here...
I am looking for some advice. We have a 16KW Samsung ASHP installed, UFH throughout (screed to ground floor and suspended Clippaplate upstairs).
The ASHP is an energy guzzler, I expected it to use a fair amount, but I can barely maintain (and sometimes not even achieve) 19 degrees downstairs for anything less than 40kWh per day - this with an outside temperature of 5 degrees. I haven't even turned the heating on upstairs for fear of the energy consumption, so freezing up there!
Is there anyone I can discuss settings, flow rate etc with? I don't know all the language or how to check these things, so go easy on me!
Hello LostInSpace. I'm also fairly new to this but will attempt the usual introductory run down of necessary information.
For starters, what controller do you have and where is it? You should have installation documentation about the various aspects of the system. Also how big is your house, 16kW implies a somewhat bigger house than average, so higher consumption is expected.
There should also be heat caluclations, at least very rough ones, from the quote, which should give us an idea of what the installers were expecting.
Lots of people on here can discuss flow rates and weather compensation settings, but until you can see them yourself on the system it is not as clear.
Also for comparison we have a 12kW system and at the weekend with -4C at night and 0 to +2 in the day we used about 34kWhr on the heating and hot water, so it does sound to me like things are not optimised.
And by turned the heating on upstairs, was the system specified to run upstairs and downstairs heating at the same time? So in turning it off you have halved the required flow volume and heat from the heat pump?
I also have a 16 kw system and I am shocked at the amount of electricity that is required. Yesterday in 24 hours we used 57 kw and we are aiming at 19c. We have an Ecodan system which has a low COP-we get just over 3 and that is using a compensation curve and running it 24 hours as recommended.
it is much more expensive to run than the oil boiler.
from midnight to 9 am the house used £9 of electricity. Most of that is the ASP. Apart from a fridge/ freezer nothing else was on.
i don’t have solar panels so I’m stuck with a system that is burning up our pensions.
I have a 16kw samsung. yesterday with outside temps stuck around zero all day, I used 45kwh of electricity, for 120kwh of heat (including quite a lot of hot water). that kept the house at 21C 24/7. thats by far the worst day so far this winter. most of the time running at 2 to 2.5kw of electrical input, for 7 to 8kw of heat output, thats including defrosts. today more or less the same. at 5C outside I get way better.
the vast majority of performance issues are down to the overall system design, not the heat pump itself.
To start with, please just try to describe your system. Some specific things to cover:
what controls are you using? an external thermostat or is the samsung controller being your thermostat? Do you have Weather compensation (Water law) enabled or are you using a fixed flow temperature? Do you have a buffer tank or a low loss header? do you have TRV's (or the UFH equivalent) or are the zones open all the time? what do the flow rate and water outlet temperature say when you go into the diagnostics on the controller?
"turning the heating on upstairs" may actually be part of what you need to do. To cut to the chase (there are many in depth explanations of this but please trust me) : heat pumps will always work better, the more emitters you can get in the circuit, fully open to constant flow. its a difficult one to get into your head if you are new to a heat pump, it certainly was for me.
My octopus signup link https://share.octopus.energy/ebony-deer-230
210m2 house, Samsung 16kw Gen6 ASHP Self installed: Single circulation loop , PWM modulating pump.
My public ASHP stats: https://heatpumpmonitor.org/system/view?id=45
11.9kWp of PV
41kWh of Battery storage (3x Powerwall 2)
2x BEVs
- 22 Forums
- 2,055 Topics
- 44.8 K Posts
- 15 Online
- 3,289 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
-
Win a 6-panel PV courtesy of egg and Renewable Heating Hub
Our epic giveaway just went live! Want to win a 6-pan...
By Mars , 5 hours ago
-
RE: Yes, the "zoning with ASHP" topic again...
James, thanks again for your thoughtful and persistent ...
By HarryRea , 6 hours ago
-
RE: Getting the best out of a heat pump - is Homely a possible answer?
Isn't that the whole point of homely - it does that fun...
By Johnmo , 8 hours ago
-
RE: Is this normal? Click of the DHW returning to space heating
So the Lone Ranger returned today! Even though we thoro...
By Grantmethestrength , 9 hours ago
-
RE: How To Balance Radiators & the Role of the Lockshield Valve: A Homeowner's Guide
@jamespa So settings to date are as follows for now. ...
By Alfapat , 9 hours ago
-
RE: Vaillant & OVO partner up to offer Heat Pump Plus
Hopefully iv done the right thing today by signing up t...
By Westkent , 10 hours ago
-
RE: IVT Greenline high pressure switch and electrical cassette errors
Hi, are you able to see the delta between GT8 vs GT9 te...
By abbote , 11 hours ago
-
RE: Battery sizing - How low can you go!
My own experience with connecting four batteries to thr...
By Transparent , 17 hours ago
-
RE: Plate heat exchanger considerations
Work on 2-3 percent per degree. This is a reasonable e...
By JamesPa , 1 day ago
-
RE: Advice for ground source heat pump in new build with PV and batteries
The useful bit is the bit that specifies the heat loss ...
By JamesPa , 1 day ago
-
RE: Volumisers in Heat Pump Systems: Does Placement Matter?
You’re absolutely right that during defrost the refrige...
By Mars , 1 day ago
-
@editor thanks Mars that’s the same table I found in th...
By Gary , 1 day ago
-
RE: Tariff and charging strategy advice please
They haven't asked me to prove that I have an EV (I do)...
By JamesPa , 2 days ago
-
RE: Solar Power Output – Let’s Compare Generation Figures
Took a while to find on the OFGEN site: ”The FIT sche...
By AgentGeorge , 2 days ago
-
RE: why solar diverters for HW instead of the heat pump?
For me there are few factors why you may want to heat w...
By Johnmo , 2 days ago
-
RE: Hydronic plinth heaters and ASHPs
@editor yes I think so. It will be a while until I get ...
By benson , 2 days ago
-
RE: Aira Heat Pump: Stylish Scandinavian Heating
I’m an Aira customer with a 6kW Outdoor Unit in a small...
By KevinPotts , 2 days ago
-
RE: Is your heat pump insured?
@richard24738 good to hear. I’ll also review them this ...
By Mars , 2 days ago
-
RE: Warm weather and heat pumps.
Just looked at my WC setting, it is programmed for 25 D...
By Johnmo , 2 days ago