@toodles 

maybe you are correct. But I went through the installer instructions and all they had to do was disable the weather compensation (for some reason Samsung calls it water law??) and input minimum and maximum flow temps for the emitters). Nothing else. 
They did set up the DHW controls as homely doesn’t see those. 
I might suggest the installer to do a reset, I’m intentionally not touching anything myself as I want them to fix it in case there is a design, equipment or install error. Then they can’t pass the responsibility to me if I haven’t tinkered with it, other than bleed the rads. 
thanks

@papahuhu I hope you get a swift resolution. Regards, Toodles

@toodles 

Just to follow up. I have made a little progress with my installer after considerable back and forth, haven’t yet had to go nuclear and put in a complaint with their regulatory body so that is positive.

They accept something is wrong, so as a first step they are coming out to repeat the heat loss survey using a revised methodology. The data I have clearly indicated my system is delivering 70% less heat than the original predictions identified, so it’s obvious to me, even before they repeat the survey, that my heat pump has been oversized. They also did something strange to my upstairs rads, they decreased the capacity by 50% in each room, ie the opposite of what you’d expect when moving from high temperature to low temperature heating. I did query this very strongly at the time, but they insisted their calculations were correct. Unsurprisingly, all those rooms where they did this run about 5C less than design temp! So I’m getting them to put that right too. 

Secondly, they are offering to remove the homely free of charge and reinstate weather compensation. I’ve asked them to put that on hold until after the heat loss survey. If the survey indicates that the heat pump it is too large then they need to downsize my unit and perhaps replace the control system anyway. 

You know you have access to your homely data, do you also have access to all systems and not just your own? For example, if I gave you the serial number of my unit could you see my data too please?

thanks and happy new year to you.

@papahuhu Hello and, a Happy New Year in a matter of hours!

As far as I am aware, your Homely Installer, Homely themselves and your own app are the only access points for your data. I gained access to the ‘Connect’ app via the Homely employee responsible for my installation as it was a form of trial run for the new Daikin integration as mine was the first to be installed on a Daikin EDLA series. Regards,, Toodles.

@toodles Thanks. Yes I’ve tried three or four times and can’t get my own data. Some folks on the forum were indicating all you needed to do was register as an installer and load the installer app, which I did. But they are wrong, I still can’t see my data via connect, I’ve tried on iOS and desktop, my son even tried via Linux but nowt. It must be some special access that homely set up for you. Very annoying, not being able to see one’s own data. I can understand why they discourage it, but as a diagnostic tool it is invaluable when your own installer doesn’t want you to see what they can see.

@papahuhu 😟 Toodles.

@papahuhu Sorry for the slow response but mine doesn't stop and start frequently.  I have a newbuild house with UFH a 5kW HP which is oversized but there's not really any smaller models out there. My max flow temperature is set to 35 degrees and most of the time Homely increases the temperature to that max, it oftens starts the temperature around 28-29 and increases it as the water in the system warms up. I find homely works quite well when it is cold outside but once it gets above 5 degrees during the day it tends to overheat the house. It feels like it is struggling to adjust to the low heat losses of a new build. It also takes a long while for the house to cool down so the HP isn't cycling frequently.  

I have just had a battery installed and have switched to Octopus intelligent go. I have to switch cool night mode on otherwise it overheats the house and we get too warm, unless it is around freezing or lower overnight and low tempertures during the day. Cool night mode does make the overheating better for us as it is more likely to follow the temperature schedule we have set, low in the morning and a little higher in the evening.  It does tend to heat the house more in the late afternoon, and overshooting the set temperature, and then let the temperature drop as the evening advances. This isn't really what we want as it is cooling when we sit down in the evenings and want it to be warm.  This is because it doen't need to add heat and it is waiting to restart the heating at 11.30 when the offpeak period starts.

I really need the flow temperature to be around 25°C for the heat pump to be on all the time but the HP uses more electricity when I try to do that. How Homely is running it is cheaper and it is usually a reasonably consistant temperature, it's just not as comfortable when the outside temperature is above 5 degrees as it is when it is around freezing.

@johnnyb Thanks. So when you say you have your flow temp set to 35 max. Does that mean you have physically set the upper limit in the heat pump controller as 35 please?

I read the homely installer manual yesterday, homely indicate the max should be 55C. When I checked mine it was 65C from installation, so lowered it to 55. Are you saying it still works fine at a 35C max limit. Half of my problem is it runs at too high a flow temp and overshoots.

thank you

@johnnyb In conversation with a Homely technician some time back, I was told that Homely does not control the flow temperature (we were discussing my Daikin at the time, I’m not sure if this applies to all manufacturer’s as I didn’t enquire) Daikin controls the dt in the primary circuit by varying the flow rate and Homely does not take control of this. Regards, Toodles.

!!!Correction!!!

The flow temperature is controlled by Daikin controls and I note that the flow rate is stepped (again by Daikin control) and appears to start a cycle at high, then ramps down to medium, then after a short time, down to low. In our Daikin, this is ~28, 14 and 7 lpm. I don’t know where Homely steps in but I feel it should have more control over the flow temperature and prevent the max. temp. setting being used on milder weather when the demand is much lower. Regards, Toodles.

@papahuhu I have the max temperature set at 35° with Homely.  You can contact your installer or Homely and ask them to change the max temperature your flow temperature is set at.  Mine has been set at 35 from the initial install as I already knew I didn't need it any hotter.

@toodles with the Samsung Homely definitely changes the flow temperature. My system is currently on a fixed speed pump but the plumber is coming back soon to make several changes including changing it to a PWM pump.  I don't know if homely or the samsung controller will vary the flow rate but I am expecting it to enable the flow temperature to run cooler.

@johnnyb I have had Homely adjust the maximum temperature for my Daikin to 50 as 45 just didn’t cope at -7 degrees. I would imagine that the 45 would normally have coped but we like a rather elevated  comfort level of 22.5 deg. C and the system struggled to get above 21 in the early hours until we had the adjustment.

I have noticed that in the last few days with OAT of 8 degrees or more that the system is running cooler and rarely exceeding 40 C flow temperature. In mid-October, I noticed a sudden shift in pump flow rate and after initial running time, the flow rate reduces from ~28 to 14 and, now since mid-October, then down to ~7 lpm. I suspect that this was due to a firmware update from Daikin - but I am only guessing. I will enquire further at the next annual service. Regards, Toodles.