ᐅ Air in Wall Heating Systems – How to Permanently Eliminate It?
Created on: 24 Nov 2021 21:34
O
OWLer
Hello everyone,
My wall heating system from this thread has now been put into operation with our move-in. So far, so good – it gets comfortably warm, but only when there is flow.
Unfortunately, I notice that this heating circuit gets "blocked" by air about once a day.
What the heating installer has done so far:
What I have been doing so far:
I would have thought that if you push the air elsewhere, it would eventually accumulate again at the highest point—in this case, the pipe bends of the wall heating. Flushing everything should at least help. However, there will still be air trapped in the pump, connectors, and other places, which will eventually gather there again.
Since I have only installed a dirt separator so far, my next step would be to have a microbubble separator installed in the supply line, for example, a Flamcovent Smart EcoPlus, at my own cost. Of course, I will have everything flushed under warranty beforehand.
Would this approach work? The individual heating circuits can be closed at the hydraulic separator, so water loss from opening the hydraulic connections should be limited. Alternatively, I would accept the unpleasant effort of completely flushing and refilling everything. But only if the microbubble separator reliably captures and vents the air on its way up. I’m not so sure if just a complete flush is enough. Over the years, the system will always draw in or release gases somehow.
Do you have tips or experience with this?
My wall heating system from this thread has now been put into operation with our move-in. So far, so good – it gets comfortably warm, but only when there is flow.
Unfortunately, I notice that this heating circuit gets "blocked" by air about once a day.
What the heating installer has done so far:
- Flushed the entire hydraulic separator (HKV) twice at the top
- Scratched the head to figure out where the air might be coming from
- Suspected it might be because I deactivated the automatic air vents (ERR), so other heating circuits never close to "flush through"
What I have been doing so far:
- Monitoring
- Initially, there was a lot of air in the system. The entire hydraulic separator was bubbling and hissing. This was flushed out.
- After that, some calm, but also quite high outside temperatures. Adjusted flow rates, heating curve, etc., throughout the house. Complaint that the heating circuit again has no flow.
- Usually no noises after the second flush.
- However, once a day, I have to close all heating circuits at the top except for the wall heating to "push the air out" again. This works somewhat.
- Over 12-24 hours, the air seems to circulate again until it blocks the heating circuit once more.
- Contacted the general contractor, expressed my dissatisfaction, and demanded a full flushing and venting of the entire system.
I would have thought that if you push the air elsewhere, it would eventually accumulate again at the highest point—in this case, the pipe bends of the wall heating. Flushing everything should at least help. However, there will still be air trapped in the pump, connectors, and other places, which will eventually gather there again.
Since I have only installed a dirt separator so far, my next step would be to have a microbubble separator installed in the supply line, for example, a Flamcovent Smart EcoPlus, at my own cost. Of course, I will have everything flushed under warranty beforehand.
Would this approach work? The individual heating circuits can be closed at the hydraulic separator, so water loss from opening the hydraulic connections should be limited. Alternatively, I would accept the unpleasant effort of completely flushing and refilling everything. But only if the microbubble separator reliably captures and vents the air on its way up. I’m not so sure if just a complete flush is enough. Over the years, the system will always draw in or release gases somehow.
Do you have tips or experience with this?
