Samsung ASHP owners what have you set your weather compensation to?
Interested to see what others are using (while realising its completely dependent on your house, the size of the unit etc)
Mine currently is low temp - 2 (2011) Max temp 15 (2012)
UFH highest flow temp 40 (2021), lowest 28 (2022)
Rads highest flow temp 40 (2031, lowest 28 (2032)
Currently resetting Flow temps as per my thread adjusting lockshield valves.Posted by: @cyrusirInterested to see what others are using (while realising its completely dependent on your house, the size of the unit etc)
Mine currently is low temp - 2 (2011) Max temp 15 (2012)
UFH highest flow temp 40 (2021), lowest 28 (2022)
Rads highest flow temp 40 (2031, lowest 28 (2032)
Low temps -5c for Scotland
Max temps 15c
It has been 50c for years but experimenting after Lockshield settings with firstly 46c Now at 44c
Over the last 3 days of consistant outside temps and adjustment to make three rooms 2 degrees below Thermostat setting of 22c average the cost hast gone up from £10-£12 . Ill be giving it another day but its not working so far.
@cyrusir I have had a Samsung HP since 2023 but January 2025 is the first month we have had -2C and lower temperatures to enable me to finally trim my weather curve (water law in Samsung speak).
Mine is currently:
OAT 15C - Flow temp 37C
OAT -2C - Flow temp 52C
My 12 Kw unit becomes a little unstable with flow temperatures lower than 37C plus the compressor cycles more. As Mr Hendra once said it can only modulate down to 40% its max capacity before the compressor starts cycling
Regards
5 Bedroom House in Cambridgeshire, double glazing, 300mm loft insulation and cavity wall insulation
Design temperature 21C @ OAT -2C = 10.2Kw heat loss
Bivalent system containing:
12Kw Samsung High Temperature Quiet (Gen 6) heat pump
26Kw Grant Blue Flame Oil Boiler
All controlled with Honeywell Home smart thermostat
Not sure if this is working , smaller rooms a bit colder and larger a degree off the 22c .
Having said that I observe that pump is on but only showing 1.5kw consumption on smart meter, now 2kw but only shows it’s cutting consumption but achieving target, which has been on since 3.30pm .
I'm running a 'flat' WL curve of 32C (32C @ 15C OAT; 32C @ -2C OAT), and I then manually adjust LWT up and down on the controller heating screen. At the moment I'm run 32C during the day, set back to 30C overnight and boost to 35C during the cheap price Octopus Cosy slots, but I can tweak this depending how hot/cold the house feels.
Samsung 12kW gen6 ASHP with 50L volumiser and all new large radiators. 3.645kWp solar (south facing), Fox ESS inverter.
Solar generation completely offsets ASHP usage annually. We no longer burn ~1600L of kerosene annually.
- 22 Forums
- 2,055 Topics
- 44.8 K Posts
- 21 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 , 6 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 , 11 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 , 18 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