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Mitsubishi ASHP - Circulating pump noise?

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Air Source Heat Pumps (ASHPs)

Last Post by Toodles 1 year ago

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Transparent

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18/04/2023 1:41 pm

Wall brackets and drip trays for wall mounting of ASHPs are readily available.
So that shouldn't be a problem.

The issue is accessibility.
If there's a flat roof beneath, then access is easy.

This post was modified 1 year ago by Transparent

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Toodles

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18/04/2023 2:15 pm

Noise and vibration transference concerned me greatly - though I could see that even if vibration problems * could be negated (and I doubt how effective this might be) the noise being just outside the bedroom window would not be favoured! Access for servicing would have to have been via a ladder / tower so that didn’t appeal much either! Perhaps by the mid-2030’s, there will be ‘silent’ and much smaller / neater ASHP’s that could be installed almost anywhere!!! ;-)))

* I did investigate various anti-vibration mounts etc. in the early days of my research; the general feeling seem to be that at best, they would reduce vibration transference but could not be expected to eliminate it. I am also aware of the existence of wall mounting kits so, really noise and vibration were the real no-no’s for me. Regards, Toodles.

Toodles, 76 years young and hoping to see 100 and make some ROI on my renewable energy investment!

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Toodles

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18/04/2023 2:27 pm

And going back to the very informative article ‘

‘10 Things To Consider When Choosing Pipe Insulation Thickness ’

I would class the ‘heat loss’ in the airing cupboard as “Always Useful” and am happy to leave the current pipe-work ‘as is’. Regards, Toodles.

Toodles, 76 years young and hoping to see 100 and make some ROI on my renewable energy investment!

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Transparent

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18/04/2023 2:40 pm

Bringing this right back on topic (noise),
can I point out that anti-vibration mounts are cheap and readily available from UK-based online stores.

They are available in a very wide range of sizes.
You simply look for the mass (Kg) you wish each mount-point to carry, and the size bolt you require.

Do heat-pump installers know about these devices, I wonder?

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Toodles

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18/04/2023 3:46 pm

The ones I discussed the subject with did - but did not rate them highly for all that! Regards, Toodles.

Toodles, 76 years young and hoping to see 100 and make some ROI on my renewable energy investment!

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Toodles

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08/05/2023 4:56 pm

@transparent I have been thinking about the valves that are not insulated and began to wonder if perhaps this is intentional so started to Google ….. The valves are antifreeze valves that will automatically open and drain the pipes on the heat pump side of the LLH if the temperature drops to 3 degrees C.

CALEFFI.COM "https://www.caleffi.com/sites/default/files/file/01376_en.pdf"

tells me that the valves should not be insulated - but they should be protected from the weather so I’ll take this up with the installer. Regards, Toodles.

Toodles, 76 years young and hoping to see 100 and make some ROI on my renewable energy investment!

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