@jamespa I was told by the octopus engineer to set the target temp to 21c, and it's not getting to 21. It's been "warming up" since midday and still not up to 21c. 

I can live with 21c tbh, but it's more my mum who seems to prefer something close to 22c. She spends most of her day in the living room, where it lags a few degrees behind. Hopefully won't when I do the adjustment tomorrow.

I'm pretty sure my system was designed to reach more than 18c, as per my radiator schedule. IIRC, its supposed to be able to reach 21c in the living room.

Posted by: @editor

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Posted by: @razz

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I was told by the Octopus people that the primary pod should be in the part of the house with the most consistent temps.

Does your hallway really have most consistent temperature or was it just easiest for Octopus to install your pod there?

This is nothing more than guidance, but our main thermostat (pod) lives in a place that is most ‘neutral’. Our main living areas are the warmest and get a lot of solar gain. Our TV room is the coldest as is the rest of the north facing part of the house. So ours lives in the hallway because it’s the ‘middle’ temperature of the house and that works for us to deliver and call for heat most uniformly. 

Like @andrewj says, it’s about figuring out which room in your house that is.

The rear extension (living room/diner/kitchen) has a lot of glass, plus a 'roof lantern', so it gets cold in the winter, and VERY hot in the summer. Same with the loft extension.

IIRC, the installer said one of the reasons they put it in the hall to avoid the heat spikes from cooking. The installers were worried about the cosy hub wifi signal reaching the pod, so didn't want to put it to too far from the cosy hub. Also, the old thermostat was in the hall, so they figured it would be a good spot.

I think putting it in the first floor hall might be more 'neutral', it's relatively sheltered from solar gain, away from any particular radiator etc.

Posted by: @jamespa

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I just want to repeat and emphasise that, in simple terms, you have to choose between radiator balancing, in which the householder must currently play a part in some cases, or maximum comfort.  This choice is independent of whether the heat source is a heat pump or a boiler, because its about the behaviour of the radiators and the house not the heat source.

Stay the course and you will very probably achieve  much higher level of comfort than you ever will with a boiler based system (at least one set up as we almost invariably do set it up).

Up until the introduction of heat pumps more or less the only people in the UK* who experienced the significant comfort benefits of low temperature operation (which you aren't yet seeing) were those with underfloor heating.   Heat pumps are spreading those benefits to the majority with radiators, but it takes some adjustment, both in terms of how we think about and operate the systems and of the systems themselves.  Stay the course and take the time to develop a bit of understanding and you should see the benefits.

Instead it's the exact opposite, and I'm paying a premium to be colder, and once again sleeping in my front living room, with ache/pain in one ear, in a strangely noisy house.

Posted by: @razz

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I was told by the octopus engineer to set the target temp to 21c, and it's not getting to 21. It's been "warming up" since midday and still not up to 21c

In an earlier post you’d stated: “Also, it looks like the radiator balancing is way off. Right now, my bathroom is 22.5c, hallway is 20.8c (target of 21c), and living room is 18.2c.”

The hallway at 20.8C is just about there. Does it not maintain and hold the temperature? What about the bedrooms and other areas (apart from the living room), are they at or close to 21?

Posted by: @editor

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Posted by: @razz

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I was told by the octopus engineer to set the target temp to 21c, and it's not getting to 21. It's been "warming up" since midday and still not up to 21c

In an earlier post you’d stated: “Also, it looks like the radiator balancing is way off. Right now, my bathroom is 22.5c, hallway is 20.8c (target of 21c), and living room is 18.2c.”

The hallway at 20.8C is just about there. Does it not maintain and hold the temperature? What about the bedrooms and other areas (apart from the living room), are they at or close to 21?

 

I don't have sensors in the bedrooms, but they're noticably colder so probably about 18c.

Posted by: @razz

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This is the vision I bought into when I signed the contract for the heat pump.

 

Instead it's the exact opposite, and I'm paying a premium to be colder, and once again sleeping in my front living room, with ache/pain in one ear, in a strangely noisy house.

Well its achievable almost for certain.  BUT you have to go back to basics and operate 24x7 with the weather compensation correctly adjusted, the main sensor (if there is one) in a sensible place and preferably disabled (not sure how the Octopus heat pump responds if you just turn the target to max, thats the normal way to disable sensors), radiators balanced with TRVs (if fitted) set well above the desired temperature.  If you have problem areas of the house such as the area with the roof lantern then you have to recognise them and give some thought to how you will deal with them because no boiler or heat pump can, on its own, fix such extremes.

 Its unfortunate, but we currently do not have the technology to do this automatically, it needs systematic manual tweaking until its right.  This does take time but is well worthwhile.  In many houses this can be done at install time but unfortunately some, such as yours it appears, have quirks that no installer can realistically find.

We can help here if you answer the questions, but ultimately only you can do the adjustments!  Let us know how tweaking the LSV in the living room affects things.

The buzzing is back...

Me again just to keep you all informed.

still an on going saga, had engineers out, moved hot water sensor to bottom of tank as 300l was only enough for 2 showers before the water got cold. So now the max temperature  i can get hot water too is around 47 and takes around 2 hours but then never seems to go hotter in the app. Ie I haven’t got to 50 degrees yet. Shall see 47 probably hot enough. Not sure legionnaire cycle will ever work? 

Noise at least the 2 engineers yesterday agreed it’s still too noisy listening to it themselves, not sure what happened but the heat pump has got noisy again not as bad as it initially was, but still too loud. They have gone off to see if new firmware was load over the previous good version. 

i’m back to heating water during the day and setting overnight temperature low so pump doesn’t start. Wife was nagging as no sleep but at least Octopus are trying to sort.

oh the internal vibrating noise they have tried lagging internal pipes! Can’t test yet as letting family have a good nights sleep.

must admit when it was working it was pretty comfortable and costing around £7 a day,

when i run it like now its around £12 a day as it empties my house batteries early on during the day so i’m using peak price most if the time.

still these are new units fingers crossed they will sort soon.

ps its all wind noise, one if the engineers covered part of the fan when it was idling and the noise was similar to the sound i am getting during a heat or water schedule. To me sounds like the grill is causing most of the noise as aur rushes through ? 

Good to hear that progress is being made!  From what you and others say Octopus seem to recognise that there are issues with the Cosy 12 and working on fixes, so very likely a bit of patience, even if its annoying, will pay off.

Posted by: @l2jad

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still an on going saga, had engineers out, moved hot water sensor to bottom of tank as 300l was only enough for 2 showers before the water got cold. So now the max temperature  i can get hot water too is around 47 and takes around 2 hours but then never seems to go hotter in the app. Ie I haven’t got to 50 degrees yet. Shall see 47 probably hot enough. Not sure legionnaire cycle will ever work? 

The legionella cycle may run on the immersion, at least in part.  It depends on the heat pump, my Vaillant does it natively but many heat pumps engage the immersion.

Posted by: @l2jad

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ps its all wind noise, one if the engineers covered part of the fan when it was idling and the noise was similar to the sound i am getting during a heat or water schedule. To me sounds like the grill is causing most of the noise as aur rushes through ? 

Very plausible, grill design is pretty important to noise and of course the fan is probably running faster than with a Cosy 9. 

@l2jad Re the noise of heatpump - mine has been noisier again over last few days. It seems to be the colder outside temperatures. It had been running a lot quieter but as soon as the temp dips below 5 degrees it ramps up again, not as loud as before but still too loud! This is definitely something Octopus need to fix or we'll be suffering again next Winter

@harriworld this has been my experience as well.

@harriworld yes temperature does affect it have noticed that, last weekend was zero and i was asked to report back to octopus, which i have. i had experimental firmware on it, which was like running on tick over, very quiet, after their previous visit with the developer leads i believed it was being released.

The installers yesterday are trying to find out if i was updated again because thats when it went noisy again!!! Hopefully I should hear what i now have and is it the same i had been tested with ??  

if you try covering half the fan when its quiet it sounds really noisy thats why i think its the grill causing the problem. 

at least they know they have an issue as the installers have heard the noise it makes!!!

its definitely improved on my original problems but still not acceptable, as said i have basically had to set it off overnight and ramp up in the morning not on my cheap tariff period. But wife can’t sleep with it, i suffer tinnitus so not do bad for me