Wait a minute.... thermal store?

Uh-oh....

There’s no thermal store just an immersion. Think that’s just the architects denotion for them taking up space in that room (which plant room took more of)

Plumber here currently. Checking over the LLH. No issues as expected. Mag one had nothing in. Y strainer had a little bit in but nothing massive. One thing he has said, looking at the LLH it was the wrong way round. When he was putting it up can see two arrows showing the flow of hot and cold. Eg flow pipe coming in top right should be higher than top left pipe according the manufacturers label on the unit (literally on the back from where it was installed…) Doubt will make much difference but will let him get on with this, then check temp diffs between top right (in from ASHP) and top left (through to heating system).

I’ll push for trying without Mag one and the tacosetter but I’d put money on push back on that due to time we’re on.

So LLH turned around pipe heights changed.

currently temps either side of top of LLH pretty much rising in sync which we haven’t seen before. Waiting it to get to 40c to confirm.

Posted by: @crimson

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@iancalderbank 

Thanks, I’ll ask about checking the y strainer. Chap here the other day said they had that in system as plastic pipes in the system which the Mag One wouldn’t filter?

 

4 port valve - connected to water softener yes.

 

I’ll press for focus on primary flow rate. Last I heard from them on the flow rate was they’re not sure that’s correct on that gauge/tacosetter - something about spring not right - and may replace that as didn’t think we’d get as much through as we are, but suspect this is a bit of blinded to checking all options and focusing on the LLH. Between the 2 that attended this week I get feeling 1 isn’t sure it could be the LLH itself and 1 is focussed on that.

 

if they come today, suspect not as that’s relying on a delivery coming decent time, after Monday if no change I’ll insist on Grant attending to get things moving

Did you try the test that I suggested, stopping the secondary water pump and seeing how long it takes for the heat pump return temperature to increase to the value of the heat pump flow temperature, then calculate the flowrate?

Apologies slipped past me that one.  I’ll have a look over weekend.

Plumber has headed off, with the LLH turned around we have temps either side of top of the LLH virtually in sync, will see over weekend how it goes. Currently 36.5 top right, 37c top left. Will see when gets to closer to 40 top right where we are. 37 is highest I’ve seen on a heating cycle top left.

I’ve come down with a bug so bit out the game today, but will report back how things go.

Posted by: @crimson

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So it would appear the the moron, sorry plumber, who originally installed the buffer tank, must have been absent from the training course when the trainer explained the meaning of the arrows. 🙄 

Since changing the direction of flow through the buffer tank would appear to have resolved the problem, this means that the internals of this device are not as simple as one would expect. Can you see the make and model details?

Judging by the temperature readings, it would appear the the primary flowrate is now greater than the secondary flowrate.

Are the heat emitters getting warm?

Yep moron is very apt, this screams of other issues on the project, the arrows just say it all. Reminded me of those action scenes with a claymore sign saying side faces enemy, this should have this side faces idiot on it.

i said to plumber today no one mentioned that on forums and his response was probably no one would think someone is stupid enough to install it wrong way round, can only laugh.

hall rad now hottest ever been and zones heating up very quickly, downstairs dropped to around 17-16.5c with system off for a good,while, it hit 20c quite quickly. Will see if goes north of 20.5c which it never has without help from a log burner and certainly not in evening.

The temp coming into system from LLH is a good 5-6c hotter than I’ve seen before so would explain why rads getting more heat.

Posted by: @crimson

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Yep moron is very apt, this screams of other issues on the project, the arrows just say it all. Reminded me of those action scenes with a claymore sign saying side faces enemy, this should have this side faces idiot on it.

i said to plumber today no one mentioned that on forums and his response was probably no one would think someone is stupid enough to install it wrong way round, can only laugh.

hall rad now hottest ever been and zones heating up very quickly, downstairs dropped to around 17-16.5c with system off for a good,while, it hit 20c quite quickly. Will see if goes north of 20.5c which it never has without help from a log burner and certainly not in evening.

The temp coming into system from LLH is a good 5-6c hotter than I’ve seen before so would explain why rads getting more heat.

I'm pleased to hear that your problems appear to have been resolved. So the plumber was correct, the problem was the LLH. Was he the one who installed it? 

So how much time, effort, and expense have the 'arrows' caused?

No one mentioned the LLH being the wrong way round because, I for one, thought it was just a vertical length of pipe with four pipes connected. It may appear that there is some form of Non Return Valve (NRV) included, though as yet I cannot understand why.

Is there a nameplate anywhere? Try top or bottom.

Wasn't a criticism of anyone here by the way, was just me seeing if he had any insight. I think dumb luck that he spotted this.

Looks to be Sprzęgło hydrauliczne, took a photo but apologies can’t make out a model number.

Downstairs still sitting at 20.4c, so no champagne just yet. 

Is a concern the temp going out bottom right is now so high

Has the flow rate now increased if you look at the regulator below the pipe where the mag one sits?

Balancing the flows across the LLH is something to tinker with but first make sure the primary flow issue is now sorted, then look into flow rate options on both sides.