Noise from Indirect Expansion Unvented Storage Cylinder

[iainh]

Hi all,

Looking for some guidance on noise from an unvented cylinder. Due to the water mains pressure being a bit low we went down this route so I'm not sure what to expect noise wise as it's not a system type I'm familiar with.

Hoping someone can advise if this is a 'normal' amount of noise. I couldn't find the detail on Google and the manufacturers data doesn't appear to cover it.

Thanks

Video shared here -

VID-20230130-WA0008.mp4

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And photos of spec

IMG-20230130-WA0005.jpg (135.16 KiB) Viewed 297 times

IMG-20230130-WA0006.jpg (125.71 KiB) Viewed 297 times

IMG-20230130-WA0007.jpg (152.24 KiB) Viewed 297 times

[Razor]

If that's during cylinder reheat it sounds like coil resonance caused by too much flow going through the heating coil. Sometimes you need to add a lockshield valve across the flow and return before the cylinder to alter the flow rate