Helene

Hello, I would love to know how you got on with the cover since 2021, and if you had any issue. thanks.

A bit of an update - the boss of the company who sold us the ASHP came around (after bad reviews I left) and agreed that our loft K3 shouldn't have been installed off the 15mm pipe from the room underneath (my office, which is cold). It prevents both rooms from getting a decent flow. So they will reinstall the K3 off another part of the house with 22mm, and help balance the system too. I'll give an update once it's done. Thanks everyone for your inputs so far.

Here is video https://photos.app.goo.gl/8XUp77f5hGCiCPoj8 Hope it helps a bit more. Thanks

I will try to look more closely at the piping, but hard when I'm not used to any of it. maybe a video could help? Very good question - they were supposed to send an engineer two months ago, now it's radio silence - needless to say that I am appalled. I've just sent yet another email to inform them that I'm going to charge them for an engineer visit that I will arrange myself.

I'm unsure it's the case as there was no air for a while when I last bled them, it might be because I've balanced the rads again, changed speed pump, etc.

I hope a few of these pictures help, it's really hard to take a picture as there are pipes in the way. So you think potentially two pumps is over the top? In this case I would think my whole system would be flying but instead it seems feeble.

I tried to change the speed and the flow rate didn't increase indeed. The top floor K3 badly needed bleeding actually (again) - so I was hopeful it was going to sort everything but I still have the same issue. I need to take a picture of the pump, it's a Mitsubishi Zubadan 14Kw. Here is a picture of the system, not sure what these things are called Hopefully it's good enough. I'm puzzled about why one red pump is upside down - I'm sure there's a reason. But they don't seem to be at their maximum, at least one of them. It's definitely something I want to nail indeed. thank you

Very interesting - I did change the speed a month or so ago as it was making so much noise - but didn't notice a difference with the rads. I just wish I remembered if the original flow rate was 40 or the same as now, as I've turned the speed back up to maximum last night but the FR didn't increase at all. I'm wondering if the piping is simply not adequate... though the top K3 does work when the other rads are turned off - not sure what it indicates... I'm desperate for the installer to send an engineer but they ignore me...

I could give it a shot when temps get higher again... as it would cost a lot at the moment 😬

Thanks so what would be the reason to have a lower flow? wrong balancing? The former is hard as it's a big house and I think the circuits splits in various places, and I don't know where... and there are various radiator types... but worth trying again. I've done that at the beginning and coldest radiators worked perfectly well - just not when all the rads went back on.

It's been nearly 3 months I was leaving with it until the cold came back. So you didn't have to do anything and it balanced itself?

Thanks for asking, still not - it's getting slightly warmer but cold return flow... it feels like all the working rads are on the edge of (hot/completely cold) if I turn them down in the slightest so I wonder if it will even get balanced.

We did but bleeding it (although needed) didn't help - I think I'm starting to make progress now that I've identified which sides are flow pipes and return pipes... didn't help that I knew nothing about anything to start with and that the new rads were fitted the wrong way around.

It's good to know for the K3 as I always feel like it's not getting hot enough, or not entirely filled up. What does the wago connector do? Thanks

I have tried the following methods: - Turning the lockshield valve off gradually for the radiators getting hotter quicker - but it's proven really hard because the house is big, the circuit might be all over the place (due to house extension) and various radiator types (most are K2/K3 but a few a single convector or towel rails, the latter being the hardest in my opinion, and can strangely have a big impact) - Using thermometers to try to get a delta to 5-7 degrees - only realised that a lot of our lockshield valves and TRVs have been mixed up so I'm having to re-do it all, however with 16 radiators it feels like I'm going nowhere... it seems that doing that gave me 10 degrees different on the flow pipes of different radiators... so far from the 1-2 degrees difference. Thank you