if you fix the thing that is supposed to be free moving to absorb vibration to will pass the vibration down the line, flexes need to be free floating either behind the unit, to the side or through the wall but always free to move.
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sorry i needed to be more clear, is the pink the flexes?
Well at least its well insulated, but Im not sure that insulation is fit for external use. Others may recognise it as either internal or external grade insulation, I thought external grade usually had a shiny coating but there may well be a variety that doesn't.
Its impossible to tell from a photo whether the section marked is flexible, but if it is why would you put a clamp in the middle and why would it be perfectly straight? It needs to be free to move as @ashp-bobba says, supporting it half way defeats the point!
Installer to fix the noise and confirm that the insulation is external grade IMHO.
This post was modified 19 hours ago 2 times by JamesPa
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.
If the flow rates are higher than necessary it can cause significant noise & vibration. We had that on our new install 5 years ago. Solution in our case was to add a diverter with a manual valve that was set by trial and error. Diverter pushes part of the flow back into the return.
Perhaps not ideal? But in reality the heat is not lost/wasted - perhaps a small loss of efficiency?
I am not a plumber or installer! So my description might not be exactly right. All I know is the problem was solved and system works fine.
Listed Grade 2 building with large modern extension. LG Therma V 16kw ASHP Underfloor heating + Rads 8kw pv solar 3 x 8.2kw GivEnergy batteries 1 x GivEnergy Gen1 hybrid 5.0kw inverter Manual changeover EPS MG4 EV
Yes, Live Monitor on the 'HPAI' (not the Sensocofort) tells you the flow rate. It also tells you lots of other very useful things and is worth getting to know! Unlikely to be this unless there is air trapped somewhere, but possible of course. Get the flexi fixed though whatever you do.
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.
they didn’t do a base they just sat it on some paving edging pieces stacked on top of each other then on top of my old concrete path that runs along the back of the house.
@jamespa this is the third attempt to sort the flexis as the first time they were fitted they were not insulated properly and they changed one when they returned to finish off. But I then found out they were supposed to be straight and not bent 90 degrees so they returned and fitted new ones on the wall as it was about the only place they could go in a straight line.
the insulation is primary pro so is outside rated.
im pretty sure I’ve had this noise with the flexis in different positions so not sure it’s that. I suspect it’s either the base transferring noise up the wall, which would explain why I can hear it in the lounge which is about 5m away along the back wall, as I would have thought if it was the pipe work it would be near silent apart from the kitchen where the primaries are.
@jamespa this is the third attempt to sort the flexis as the first time they were fitted they were not insulated properly and they changed one when they returned to finish off. But I then found out they were supposed to be straight and not bent 90 degrees so they returned and fitted new ones on the wall as it was about the only place they could go in a straight line.
the insulation is primary pro so is outside rated.
im pretty sure I’ve had this noise with the flexis in different positions so not sure it’s that. I suspect it’s either the base transferring noise up the wall, which would explain why I can hear it in the lounge which is about 5m away along the back wall, as I would have thought if it was the pipe work it would be near silent apart from the kitchen where the primaries are.
I agree with the logic, the installer needs to sort it, you shouldn't be experiencing the noise!
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.
@jamespa just spun it up to do a hot water boost and turned off eco mode. Then I’ve gone round with a cheap stethoscope and can hear it where the primaries run through the ceiling, but it seems loudest on the French door glass which is about a meter or so from the heat pump.
Some heat pumps have that for running at night etc. Just wondering if it reduces hum in that mode? Afaik it runs the compressor at slower pace? Not sure what it would prove - if anything!!
Listed Grade 2 building with large modern extension. LG Therma V 16kw ASHP Underfloor heating + Rads 8kw pv solar 3 x 8.2kw GivEnergy batteries 1 x GivEnergy Gen1 hybrid 5.0kw inverter Manual changeover EPS MG4 EV
@jamespa just spun it up to do a hot water boost and turned off eco mode. Then I’ve gone round with a cheap stethoscope and can hear it where the primaries run through the ceiling, but it seems loudest on the French door glass which is about a meter or so from the heat pump.
OK. Could you post a recording. You may just hear the compressor at the beginning of a hot water cycle, although it sounds like the primaries are carrying the sound through the house indicating poor isolation. Sometimes location where sound is loudest can be deceptive due to resonant effects.
suspect it’s either the base transferring noise up the wall, which would explain why I can hear it in the lounge which is about 5m away along the back wall, as I would have thought if it was the pipe work it would be near silent apart from the kitchen where the primaries are.
If the base is transferring sound up the wall something is wrong. It should be mounted solidly enough that this cant happen. It certainly doesnt happen with mine!
Are the two long thin paving slabs immediately below the rubber feet cemented down, or is it just sitting on these which in tun are sitting on top of the patio. This could be a source, really the rubber feet should be on something thats totally solid. Are they touching the wall at the back?
This post was modified 2 hours ago 4 times by JamesPa
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.
