Underfloor heating regulation, manifold balancing.
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- Опубликовано: 7 ноя 2022
- Underfloor heating regulation, manifold balancing made easy with presetting. No need flow to balance floor heating manifold having manifold with presetting!
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Thank You. This was just the explanation I have been looking for 😊
Glad it was helpful!
Always useful, great explanation !!
Thanks!:)
Very useful…. I was wondering how to get equal flow for each circuit, especially for my system where I don’t want stagnant water in a loop
Glad it was helpful!
Thank you for your presentation.
How would this be achieved if you did not know the length of the circuits ? E.g On a system that has been previously fitted, no drawing are available, unknown pipe spacing etc ?
Thank you
In this case an option could be to open all circuits. Wait at least half a day. Measure return flow temperature from each circuit and try to make it the same. Temperature can be measured with infra red thermometer directly from return pipe. It takes time and patience.
Using Danfoss Icon 24V, Danfoss Icon 2 commissioning is not so important. Systems has automatic balancing functionality. It can balance circuits using thermal actuators mounted on manifold. No drawing, no pipe length, no pipe spacing is needed. In case you got some very very short circuits Icon controller may ask to reduce flow on it.
first of all, this is great video. i have a question. mine makes an extremely loud banging sound that lasts around 5 min when heating zones come on flow meter which keeps moving up and down.
This does not happhen often like 3 times in 3 month. do you have any sugestions.
Probably wrong flow direction. Manifold with flow meters should be on supply, manifold with actuators on return. Here is a video on this topic: ruclips.net/video/5hurO6e1xlc/видео.htmlsi=j7ddpy74ctndCtc5
@@heatingsolutions123 the sound is like video at 14 seconds to 18 seconds, and it will eventually stop with sound like pressure got released. any suggestions?
Thanks .. can you set a valve to have a minimum opening all the time ? I want to have a minimum flow in the heating system even when the heating actuator is off..
Doubt it, I'd think the actuators are on/off. Why would you want that?
With presetting it is not possible. Valve works separately from presetting. Only way is to something hand made:) Like washer on needle....
Hello, shouldn't the liter adjustment be made on the glass tube? Also, should they all be on when making adjustments via the tube?
If you know exactly how much litres/min you need for each cirquit you can adjust with flow meter. Another way is using presetting as on video.
@@heatingsolutions123 If they are all on, is the setting correct? Or should I move on to the next after setting one zone? Is there a video about this?
Some folks do this balancing on the flow meters, by taking the red caps off and setting the flow on the setting wheel. Is it a mistake ?
Setting on flow meters is another way of circiut balancing. Where do they get needed flow to set? Setting all flow meters at same flow would be a mistake if circuits are not same length.
Do the actuators just open and close or do they regulate the flow? Just wondering how this works in the real world.
It depends on room controller. Usually simple ON/OFF thermostats just open/close actuator +/- 0.5C from set point. More advanced are Danfoss Link, Icon 24V, Ally controllers... They can regulate flow to each circuit with pulse wide modulating signal the same ON/OFF actuator. In this case actuator may "modulate" and have more precise room control.
Don't the actuators control the flow rate according to the heat required by the system?
Or they just open/close?
I am looking at the Emmeti control T and it doesn't have any flow rate regulation, hence it probably needs some flow valves anyway
Apparently the flow rate is length of pipe/40 - so it depends what is the length of the pipe. I have a schematic of mine so I know what is there.
The example you show 100m to be 2.5 is 100/40 which is 2.5l/min
In case you got manifold without presetting you can use Danfoss Icon or new Icon2 automatics. It has automatic circuit balancing with actuators. Icon controller has PWM control signal. It allows to "hang" actuator on middle position, not only ON/OFF. One thing you should check is it allowed to use PWM signal with your actuators using Icon control: ruclips.net/video/52wKnb-YC9A/видео.htmlsi=tGYU5j58JU1X-97k
@@heatingsolutions123 why are the flowmeters installed at the top and not bottom?
I had an issue where the actuator's plastic broke, exposing it and the bleeding valve went and when I went to check the system, it was live since water dripped on the actuator because it was at the on the bottom section of the manifold
If heated water first enters the return manifold which the actuators are mounted , and water after completing the circuit gets into the manifold with flowmeters(glass tubes)
Does this kind of application have any drawbacks or risks while the heating system operates ??
No good. Flow meters will not work on reversed flow. Integrated valves on return manifold if mounted with actuators will be making "knocking" noise while closing. You should dismount manifolds on a right way. Supply manifold with flow meters, return manifold with actuators.
In what position debitometers should be ? Fully open ?
To open flow meter. Turn flow meter counter clockwise. Flow meter thread should be visible.
The maximum for circuit its 100m and i have 7 circuits. Circuit 1. 75m, circuit2 75m ,circuit3- 126m(to long i think) circuit4 -72m,circuit5-55m,circuit6-98m,circuit7-100m. How I can to echilibrait the system?? Thank you
Chart for d20 pipe is up to 120 meters. You can use that one, link to pdf file is here: assets.danfoss.com/documents/latest/202878/AN17038645953600-000301.pdf
Mine don't have the n and the numbers.
Not all manifolds has it.
Giacomini manifold that
Taht is Danfoss FHF manifold