Day 3 we got hot water! no radiators connected but all hung in place. Still loads of drilling, banging, sawing. After they had finished for the day I went into the loft and found the volumiser was in a very awkward place which would make it difficult for me to reconnect the MVHR.

Day 4 after a bad night of poor sleep When the crew arrived I asked the lead installer if the volumiser could be moved. He listened to my explanation and after a think he said OK that's easy. Phew I was expecting more resistance. During the day all radiators were connected filled, drained after a tiny leak found, refilled and by 1300 the pump was turned on (I nearly said fired up but that would not be appropriate 😀 ) The rubbish was taken away and, as I sat down for a sandwich, was asked to go on a tour to explain it all. By 1700 all was finished they had cleared up and all that remained was to make sure We were happy and had an understanding of the app. Yippee we had our house back! It had been a difficult 4 days but the guys were marvellous. Next I have to learn how to set it up to run efficiently getting rid of the thermostat, trvs and schedules but first have a quiet long weekend.

@lucia yes I'm well pleased and I guess after I have settled up we'll get our referral credit which will be nice. The gas meter is gone as well.

Now a week after the system was commissioned. Generally I have left the settings as they were apart from lowering the DHW to 45C and raising the house temp as it seemed the thermostat was reading low. I have removed all the TRVs downstairs and refitted the caps that were thrown away but not screwed down hard as that would (I believe) shut off the valve. The pipework outside was properly insulated and covered in substantial trunking.   

I am very happy with what the guys did and how they fell in with my wishes. The electrician made good use of the EV charge install thus not needing to fit a seperate CU. He did , however need to use my trench to fit the OAT sensor!

I now have all new radiators and the install made me upgrade the MVHR  ducting which now uses the old flue as a discharge and now has proper fireproof vents in the ceiling. 

So far so good.

I’m hoping for a bit of help. The

system is an Octopus install with a Daikin 6Kw Heat Pump. Now that I have started heating I am trying to get to grips with the controls. Octopus design to 50C but I have upgraded all the bedroom single panels to K2’s of a similar width. They upgraded the ground floor radiators to K2’s, added a large K3 and I added a 600 * 600 K2. Using Heatpunk I calculated that I should be able to lower the design temp to 45, we shall see if that works. I have removed the trv’s except for two in the bedrooms. I have not done balancing but the bathroom towel rail and main bedroom radiator are the first off the piping and I can imagine they may need throttling in.

Now I want to try to set the MMI for continuous running open zone.

Do I need to set any schedules in the app or just leave them blank? 

The weather compensation is set as the photo. If the house over or under heats, which value(s) do I change?

The Madoka, I believe I need to set above my desired temperature, 25 or more.?

Thanks for any help

Welcome, you are asking very much the right questions!

Posted by: @jancold

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The weather compensation is set as the photo. If the house over or under heats, which value(s) do I change?

 

 

The target flow temperature at low OAT (currently 40/-3?)

Posted by: @jancold

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The Madoka, I believe I need to set above my desired temperature, 25 or more.?

 

Whats the Madoka?

Posted by: @jancold

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Now I want to try to set the MMI for continuous running open zone.

 

Do I need to set any schedules in the app or just leave them blank? 

 

Dont know the Daikin UI but somewhere it will presumably implement on/off/timed (on my vaillant its called manual/off/timed).  You want 'On' (ie permanently on), which may well be the default. 

@jamespa Thanks, The Madoka is a Daikin name for a room thermostat, the MMI I call man monkey interface!! seriously who makes these control system nomenclature!  

I will look for the timed/on setting, maybe all I need to do is clear the schedules and leave the Onecta app setting On. At the moment I have set the schedule each day for 24 hours which is working and the heat pump is running most of the time. I want to put an energy monitor on the HP supply but it needs power and I am not sure if the bluetooth will come through the case.

It seems the Daikin is not so well known on the forum and I approached Havenwise and they have not yet had approval from Daikin so I'm on my own to try to get the settings. 

The Daikin user manual  is a nightmare to understand and I do like reading manuals especially when I can understand them!

Posted by: @jamespa

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Posted by: @jancold

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The Madoka, I believe I need to set above my desired temperature, 25 or more.?

 

Maybe, it depends on how Daikin use the information. 

If its operates essentially independently of the WC as an on/off signal to the heat pump, just like a thermostat, then yes, do what you say.  Quite a few heat pumps operate in this way.

However some heat pumps (like my Vaillant and at least some Ideal models) use the room temperature setting on the MMI in a more sophisticated way that modifies the WC curve, and some use it to at least in part to autocorrect the WC curve (like Mitsubishi).  Some have options exactly how that works. The more sophisticated approach has advantages when you program setbacks (or set forwards) and allows an 'average' end user to do what they are used to doing (ie turn a temperature dial up or down to change the temperature) while, under the hood, actually changing the WC (without the user needing to know about it) thus maintaining optimum efficiency. 

Unfortunately you need to understand which it does before you can decide what to do.  Hopefully that is explained somewhere in the manual.  There is almost certainly a setting which allows you to disable the effect of the Madoka altogether which might be a good place to start, 

@jancold I have a Daikin Altherma 3 8kw. Looking at your mmi, it looks as if it set a little non standard. The base setting is usually 45c at -2 or whatever your design low temp is, at the other end it’s usually 25c at an outside temp of 16c. As a number of people will tell you daikins don’t really like operating at 25c. If you have decided to use weather dependent mode, (recommended) then you don’t need to do anything, the madoka then simply acts as a thermometer. You need to make sure all trv’s are fully opened. The weather dependent will adjust heat according to outside temperature (OT) so for eg, if your OT is 10c, and the curve is flow temp 40c at -2 OT to flow temp 25c at 16c OT then the heat pump looking at the curve will aim at around a flow temp of 36c. Don’t know what you OT is at present and of course it will vary during the course of the day and the heatpump will respond accordingly. in this mode it operates 7/24. Now if it gets to warm you have a couple of options. One is to tweak the Weather dependent curve (WDC), so reduce the output at the -2 level , but leave the other end the same. Don’t make massive changes just tweak it a degree and see how it goes, then another degree. When you change the flow temp, because you are reducing the water temp you will also be reducing the capacity of the radiators to emit heat, which if you are too hot you want to do. Don’t be tempted to put in schedules etc, these I believe do mess with the efficiency. Try to tune the curve to give you what you want. The second option is the offset. On the mmi you can change the flow temperature up or down. So rather than changing the curve, you can get a similar effect by changing the offset. The offset is changed in settings at breadcrumb 2, main zone. Just use the dial on the right hand side.

To check you are in weather dependent mode go to breadcrumb 2.4 and ensure weather dependent is selected.

If you don’t know what I mean by breadcrumb, it is the number allocated to the menus. As you look at your mmi, you should be able to see in the top left hand corner a little dot. If you can’t see that press the ? On the MMI once. When you turn the left wheel on the MMI you should then be able to see the menu numbers change. To select just PRESS  the left wheel.

Hope that helps.

@terry1812 That is very helpful, thanks. Since finding the included paperwork was irrelevant I have now downloaded and printed out the 68 page user manual.

I will remove the schedules since I thought it was the way to make the pump run 24/7 and you say they are not necessary  and reset the curve. Just now our min OT is about 6C .

I have some energy recording devices that I hope to install so I can monitor the energy use. It is running well at the moment maybe with temp a little higher than needed. I'll have a good look at the manual this weekend and, if I may, come back with some more questions later.

Living by the sea in an old ex council house we have very high humidity which is a problem that I hope the heat pump will help with.

@jancold

@jancold yes, of course. I will be very interested to see how you get on with it. Especially when the outside temps get lower. Although if you are already at 6c outside that is moving into interesting territory. Here we still seem to be at about a low of 12c outside. Enjoy the manual. You said you had to print it out, didn’t they leave you with a hard copy?