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The good, the bad and the not that great – my heat pump installation

 
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Air Source Heat Pumps (ASHPs)
Last Post by Burtis 3 months ago
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Mars
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15/10/2024 10:24 pm  

@burtis did you find out if your installation is registered with HIES or RECC (consumer codes)?

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Burtis
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Topic starter 15/10/2024 10:36 pm  

@editor 

HIES buddy


   
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Mars
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15/10/2024 10:55 pm  

@burtis interesting. Have you also filed a case with them?

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Burtis
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Topic starter 16/10/2024 1:53 am  

Small update. 

I found that most of the locksheilds for the radiators in the kitchen, downstairs bathroom and connecting space were near completely shut off. We haven't touched these 

I have since opened these but no noticeable noise difference. Still the same high pitch humming from circulation pump 

Buffer tank has a auto bleed valve on the top it appears this has been leaking so presumably it is faulty no big issue I do have a spare.

MCS have forwarded the complaint on to NAPIT by the way


   
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Burtis
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Topic starter 16/10/2024 8:13 am  

@editor 

I did call HIES and they said to exhaust all other avenues first.


   
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 JamesPa
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16/10/2024 8:18 am  

Posted by: @burtis
↑

I found that most of the locksheilds for the radiators in the kitchen, downstairs bathroom and connecting space were near completely shut off. We haven't touched these 

That may (or may not) not be significant.  Many lockshields have only a tiny adjustment range ie they need to be almost 'off' to have any affect at all.  See heat geek videos/guides on balancing and particularly pay attention to 'valve authority' for further explanation.

 

4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.


   
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Mars
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16/10/2024 8:19 am  

@burtis again, very interesting because this contrary to all “advice” I’ve received.

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Burtis
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Topic starter 17/10/2024 8:05 am  

@jamespa 

Ah yeah I have seen this they were left screwed pretty far down so possibly part of the problem. 

System seems to run a little more efficiently now less cycling on and off 🤔 but hard to tell as Midea app isnt very good so going off Octopus consumption graph could just be placebo effect though as outside temperatures have risen 


   
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Transparent
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17/10/2024 9:22 am  

Hmm; well that's a fairly consistent approach.

The installers seem to have screwed both the lockshields
and their customer ...

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Burtis
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Topic starter 17/10/2024 9:43 am  

Also regarding noise from the unit itself on the wall bracket yes I expect some noise from it as is the nature of a wall bracket but there seems to be a lot of noise transfer when hot water is ramping up obviously as it's working harder and a lot of it is transferred to the wall. 

So hopefully they will sort those mounts out for something a bit more suitable. 

I did see in the document on MCS checklist that they ticked the box of where it states Anti Vibration mounts used it says 'None'


   
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Burtis
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Topic starter 17/10/2024 9:50 am  

Another point worth mentioning is the lack of a soak away. 

They just removed 3 slabs under the unit and put some gravel down unsure this is any good 


   
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Transparent
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17/10/2024 10:34 am  

The anti-vibration mounts being referred to on a checklist could be heavy rubber 'feet' beneath the outside unit.
Building Regs Part-L puts the onus on the installer to create the Commissioning Checks.
Using a 'standard' MCS form without stating what mounts are being referred to is clearly inadequate.

Part L8a

 

To test whether condensate drainage will be adequate, the installer may have poured a bucket of water onto the ground.
If so, then that too should form part of the Commissioning checklist.

You could do this yourself.
Use two buckets of water, 15mins apart, on the slab below the heat-pump.

If the second bucket leaves water above the gravel layer, then you can assume that would create an ice-covered surface in winter.

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