If these mean anything looks like they are already set
These values look OK but I cannot understand what is going on with your system. The multiple cycles in a day and the fact that they start with a load of electrical input but no heat produced is very strange… Can you get a reading on the tank temperature during one of these cycles?
This is the way my Daikin responds with those settings ;
and this is yours
Just a thought but you don’t have any secondary offtake from the HW tank do you? I had a house where the towel rads were heated by the HW tank with a secondary circulation pump…so I know it is sometimes done. Barely acceptable for a gas boiler but a real no-no for a heat pump.
I don’t believe so.
What Octopus have done is added a Eddi, and disconnected the immersion on the heat pump so it is using the heat pump to heat the hot water, only the eddi is controlling the immersion. I’ve asked for a relay board to be fitted so think that would allow them to hook up the two again.
I am at a loss, but I just updated those field codes today so will keep an eye on it.
In the schedule I think it kicks in at midnight on a new day as the time does not roll over I think so it comes on then. I’ll have a look at what the temperature on the Daiken controller says at midnight tonight.
This looks like trapped air is still affecting the flow sensor. The fact that temperature is rising means that heat is being produced, just not being measured. Need to bleed the system regularly until it measures properly.
Could probably get away with a higher setting for ‘reheat hysteresis’ to limit how many times a day it runs. Try 15° and see how it does.
They were all bled last week when Octopus came out. Said there was no air in the radiators.
What should be the setting for this?
I went into it and it was on No DHW pump???
I put it to Instant hot water but not sure that is right or not?
This appears to be happening, note the time and date in the pictures.
Open Energy Monitor reports that Electric is being used but no heat being produced.
Temperature on the Daiken Controller shows 34 degrees initially and website shows 0 heat throughout. I capture a screenshot when it was showing 42 degrees and still no Heat Output showing on the Open Energy Monitor site.
Daiken App - still showing the old temperature of 34 degrees, even after refreshing. seeems to be a delay in the app getting updated. Will leave this part for now.
Time moves on and still no heat on the Open Energy Monitor, only Electric being used. Check the Daiken Controller and temperature of the tank has gone up a few degrees, eventually hitting the target of 45 degrees. Note tank was at 34 degrees initially.
After tank hits 45 degrees, open energy monitor starts reporting the heat, showing silly COPS because no Electic is shown as being used.
It comes to an end and there is more Electric Consumption than Heat Output. after heating up from 36 degrees up to 45 degrees
Something is not right?
https://emoncms.org/app/view?name=MyHeatpump&readkey=bd99c02f463c065f0f7184a5c2eccadc
If we zoom in, we can see more clearly what’s going on:
I’m going to say “there’s air trapped in the system, which messes up the flow meter” again.
Heat pump is working just fine.
Thanks but Octopus have bleed all the radiators in the house 3 times now and the last 2 times time they have come out saying no air is in the system.
Each time after bleeding radiators I’m still getting the same results as highlighted this morning. I am at a complete loss.
Supporting @timbones view that the flow is not reporting fully just take a look at the two graphs in my message above - message 42.
As your flow and return temps continue to go up there must be flow going through the tank and as the delta T is positive and heat generated is simply flow x DT then the fact that no heat is reported around ten past midnight when there is a DT suggest that zero flow is being measured - clearly wrong.
IS the flow meter/on the correct side of the 3 way valve? ie could it be only measuring flow in the space heating circuit??
Also - a minor issue - in my system the flow - return delta t is fairly constant after the start up moments. In yours the delta T increases, which is odd, but I guess there could be an answer to this one.
Another minor issue - code 6-0D=1 meaning you are on reheat plus scheduled. It’s possible that it will always try and heat that the scheduled time irrespective of the hysteresis settings (you have those at 10c - codes 6-00 and 6-08). Although it should only reheat at other times if the tank temp drops more that 10c below your reheat setpoint of 43c.
To simplify things could you switch it to ‘reheat only’. Code 6-0D=0 ?
Also your screenshot in message 49 says you are on instant hot water. The manual says the following;
So do you have a separate DHW pump or not? ie a circuit like this one.
If not then you should have it set on code D-02 = 0 - No DHW pump.
Good luck!
Ok I put that at Instant Hot Water as it did not look right as no DHW - I put this back again to No DHW pump.
These are the install photos, the set up diagram is just a bit too technical to work out in 6.4.4 above.
I have gone though the field codes and set them as you have suggested, hoping this fixes it all. I am attaching below ALL the field codes, from what I gather these codes allow you to set everything without going through the UI on the Daikin controller, just another way to program it right?
I’m hoping to get the heating engineer out again to check this 3 way valve.
I tried to get tank up to 62 degrees this afternoon for legionella cycle.
Seems it cut out at 52 degrees and would not go any further.
Had to use the Eddi to get it up to 62 degrees by scheduling a boost session.
All happened around 1.30pm - 4pm today
https://emoncms.org/app/view?name=MyHeatpump&readkey=bd99c02f463c065f0f7184a5c2eccadc
Now that schedule is taken away. How do I schedule in the legionella cycle. They disconnected it at the immersion at the heatpump I believe so that the Eddi could control the immersion. Told it’s not possible for both to be connected at the same time. Though I am hearing different if the relay board is fitted to the eddi which I am trying to get them to do for me along with fitting the PT1000 sensors at same point the Daiken controller is using and again at the top of the tank. Along with the M5Stack M5StickC Plus to get data into home assistant.
I can no longer see the schedule, assume what was scheduled is no longer going to work now anyway. e.g. I put 2 hours at comfort level when rates on agile were lower this afternoon to do legionella heat up.
If the heat pump cant control the immersion then it cannot get to 60c for the legionella cycle. The HPmax temp ie without the immersion, is around 50 to 55c depending on the outside temp. So you have to depend on the eddi to get you to 60c now.
Using recycle only was just a way to simplify your operation to see how it is really working, and see if it is only cutting in when the tank temp drops by 10c. Its hard to advise further without a continuous plot of hw tank temp…
Can you check the position of the flow/heat meter …it shoukd be in the flow line between the heat pump and the 3 way valve?