"Heat meter air issue detected "
Dear Group, I have just recently received the above error on Emoncms. It appears to have started April 4th and continued up to April 7th where it did not happen - during the DHW heat top up. April 11th to present day happened again. Always during the 1-4 pm set timed slot for heating the DHW.
System was installed and commisioned December 3rd 2024. It has been running faultlessly since then. I have checked several radiators upstairs floor - no air in them. Iam unsure as to whether the error is erroneous itself…?
Thank you for any feedback.
Martin
Is this a Level 3 Heat Pump Monitoring Bundle? If so, remote on-line support is included in the purchase price, so you should contact The Shop: [email protected]
It is Robert. Thank you
Hi Martin,
Check your system pressure. If it is lower than about 1.8 bar the flow meter becomes more sensitive to dissolved air releasing from the circulating liquid.
You can either follow the steps detailed in the linked document to boil off dissolved gasses or use your filling loop to increase the system pressure which will avoid the effect.
I’ve struggled with this and the above steps have worked for me.
Thank David. Pressure currently is 1.7. I will increase to 1.8.
That’s useful to know David. I had problems with air in the system all last autumn, and bled top floor radiators regularly to the point where the errors were no longer being reported. But then I had some work done on the system in January, including flushing and then ‘cooking’ the system overnight. My installer also asked me to keep system pressure at 1.5 rather than 2. Since then there have been regular data errors reported and I’m still bleeding radiators every two or three weeks and often getting a lot of air out.
I’ve been having issues with data errors in the water heating periods, I’ve been bleeding my Rads constantly some days there is air other days there is none.
Has increasing the pressure had any effect ?? The vaillant app shows mine at 1.6 bar but the physical gauge shows 1.8
I’ve struggled quite a lot trying to tame the “air in the system” errors and have followed all the steps in the OEM document, with some success.
But even now I find that over weeks the pressure falls slowly in my system and when it gets below a threshold, the errors creep in.
So I keep my pressure at around 2 bar by regular topping up.
I am thinking that no matter how much “cooking off” you do there will always be some dissolved gases that can come out of solution and cause you problems if the pressure gets too low. Why not just keep the pressure a bit higher and keep the gases dissolved out of harms way?
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