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Can anyone tell me what these particular settings mean please see photo 1 of FTC6 controller (I am still on the ASHP learning curve) - I am trying to grapple with whether the Flow Temperature settings are too high/too low/just right. At the moment the outside temperature during the day has been about 18 degrees, at night we have been having near freezing temperatures. See photo 2 from Melcloud. My system is set to run 24/7 which I believe is the most economical way - low and slow. I have been having the room control set to 17 in the day and I have put it up to 18 in the evening during my off peak hours. if I move it up or down it’s only by half a degree.  My problem is that I previously had old storage heaters and this thing is using a fraction of the electricity that they were using, so all the angst about 2.5kwh usage on this forum seems irrelevant to my situation. With my storage heaters I was using 40kwh a day on May 1st, if which 7kwh was all the other stuff including oven. The Ecodan was fitted on 2nd, and now my usage (total) is currently between 8 and 10kwh a day. Happy days! But I am trying to find out as much as I can about the way the current settings are working, preparatory to the Winter when we frequently have as many as 20 days a month with below zero temperatures.  Snow lying many times between November and April. The Melcloud app is quite un-user friendly. I will go into the settings myself before winter to adjust if need be. I have already changed the legionella settings following Heat Geek video, once every 15 days to 60 degrees time 1 hour during off peak, holding for 5 minutes; that should save some money. What I want to do before winter is set up the weather compensation mode. At the moment though I am wondering what the Flow temperature settings on the right of the control panel mean. And if the flow temperature is low enough, too high, or too low - see photo three where something exciting seemed to be happening at around 2.30pm even though I didn’t change anything….!Presumably the water heating up as it had dropped below 40.

(as per advice on heat geek site for hotter weather).

 

It may be that the flow temp was 48deg because it was heating the hot water. Where did you see that value ? Do you have underfloor heating or radiators ? What was the temp in the house when you saw the 48deg flow ?

Thank you for your reply, i used to work in the gas heating industry so understand more than most i guess, i know this runs low and slow, so ve been running in comp curve at 42/-2… so generally runs 24/7 at about 35/36 degrees unless its freezing. Im happy with the running temp etc but wanted to investigate this Aa mode of running. I have solar so dont run anything on a timer as solar heats a tank during the day. Can you advise why i need the wireless stat.,does Aa only run with one of these and it wont work using main controller? Ive lookef at the settings and its set up for ‘main controller’?  I dont understand why putting my main controller on room stat mode it shot up to use 48 flow temp… isnt this linked to the weather comp? What is the benefit of another room stat controller please? This has confused me somewhat!.. many thanks, thought id sussed this ashp just using comp curve… im on comp curve 24/7 with no timer settings. I believe timer settings for hesting only work with aa/room stat mode and not beneficial for ashp that needs running 24/7 or it just goes on and off all the time?

Flow temp of 48 is in melcloud reports and on the controller initital settings, you can see the flow and return. Rads were red hot it was not the dhw as this is permanently off as i have solar.

Thank you for your reply, i used to work in the gas heating industry so understand more than most i guess, i know this runs low and slow, so ve been running in comp curve at 42/-2… so generally runs 24/7 at about 35/36 degrees unless its freezing. Im happy with the running temp etc but wanted to investigate this Aa mode of running. I have solar so dont run anything on a timer as solar heats a tank during the day. Can you advise why i need the wireless stat.,does Aa only run with one of these and it wont work using main controller? Ive lookef at the settings and its set up for ‘main controller’?  I dont understand why putting my main controller on room stat mode it shot up to use 48 flow temp… isnt this linked to the weather comp? What is the benefit of another room stat controller please? This has confused me somewhat!.. many thanks, thought id sussed this ashp just using comp curve… im on comp curve 24/7 with no timer settings. I believe timer settings for hesting only work with aa/room stat mode and not beneficial for ashp that needs running 24/7 or it just goes on and off all the time?

Auto Adaption doesn't use the weather compensation curve you have been adjusting in the weather compensation feature.

Auto adaption will boost the flow temperature to get to the room temperature you have set. 

The flow temperature will adjust to as low as possible to maintain the room temperature over time. 

You would need to run the heat pump for a reasonable amount of time under both Auto adaption and weather compensation to see what works best for you in terms of comfort and cost.

For example you'll find Auto adaption reacts quicker when heating a home from cold.

Ah! Thats why flow temp shot up to 48…. Nothing to do with comp curve settings… interesting. 🤨 so thats really confused me as to how other ppl have told me to set the curve but use aa mode so flow temp is low.. one guy said set room temp to 28.. they must have individual room stats or something?! Thank you for taking time to reply, much appreciated 

Ah! Thats why flow temp shot up to 48…. Nothing to do with comp curve settings… interesting. 🤨 so thats really confused me as to how other ppl have told me to set the curve but use aa mode so flow temp is low.. one guy said set room temp to 28.. they must have individual room stats or something?! Thank you for taking time to reply, much appreciated 

It will adjust the flow down on AA so see what happens over time, it won't stay at 48, it just doesn't use those tweaks to the curve that you have set in the weather compensation.

You could contact the manufacturer to be absolutely sure. That is always a good idea

You’re so right, although it seems counterintuitive that keeping a hp running all the time is cheaper than having it on a schedule. Maybe it could be compared to only switching on the fridge for a few hours a day but still constantly opening the door. 
There should be an idiots guide to using a heat pump handed out with each installation. I think I might write one !!

Ah yes, I see what you mean re the pallets. My outdoor unit is installed in a fairly enclosed yard so I’m trying to improve the airflow around it.

There is one, ‘Bodge Busters’!

I haven’t looked at Bodge Busters but I do know the authors’ website which has lots of useful information and knowledgeable people on its forum. A heat pump owner shouldn’t have to wade through a whole book though, BB would have to cover many types of installations and manufacturers, I assume it does.
Owners just need clear instructions for their own system. Installers are supposed to provide handover documents with that kind of info in, my installers didn’t. There’s a multitude of new hp owner’s floundering in the dark not knowing what they’re doing.

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