The radiators heat up to half - It only heats the top of the radiators

Hello, warmly, I am new here and I am asking for your understanding.
I have a problem, I started to make living quarters in the basement, a specialist from one riser on the power supply made a stub pipe (pipes went under the return and supply ceiling) and pulled it down to the made (new two-plate radiator). Then he pulled the power supply to the next room at the same height and the return also at the same height (i.e. from the bottom) to the second radiator in the other room (which was used) just behind the wall of the other room on the tee on the return made a return on the ground which at the end of the room it goes about 40cm up then through the wall and again about 80cm up and goes back to the stove. Of course, the heaters were previously installed (such spirals at the ceiling and they heated great) and the current ones are a bit lower than the level of the central heating furnace. Both heaters only heated at the top. Today he made a pump and even after connecting it (i.e. the pump), I only heat the top of both radiators. There is no air in the radiators, because we even unscrewed the return at the radiator exits (after the regular venting at the top of the radiator) and water was flowing under quite good pressure.
I apologize for mistakes but I am a layman in this topic and I am asking for understanding and help as soon as possible. I greet everyone

And are the supply and return radiator valves fully open?

Advertise the service, a professional will not leave a badly done job.
PS
Not enough readable data to start analyzing it at all.

valves unscrewed to the max
a friend writes that he writes too poorly, what else should I add to help you in the analysis?

Give me a diagram of this installation or some photos. Pipe diameters that the plumber used and what system it is ..

pexal wavina there was 20 ...

Added after 3 [minutes]:

I would like to add that the return is very cool, while the power supply at the radiator is hot and it is very, and yet it heats the top

There may be air in the pipe if they are placed in a strange way, eg the pipe "goes" up then descends, in this bend there is some air left at the top and restricts the water flow. If there is a pump and there is no cross-section limitation somewhere, it must heat up.

If the supply is hot and the return is completely cold and the radiators only heat up with the top (the bottom is colder), the reason is not air pockets, but a bad flow of the heating medium through the radiator. There may be a silted orifice, a clogged (or stony) twig (feed or return, or both), bad crusting. What valves are there on these radiators? If it is modern (with a thermostatic head), it is possible to change the coating without draining the water, after unscrewing the head (there is a pre-setting under the head, which acts as a cone). If there are old valves, then the matter is more difficult, because to clean (and even more so change) the orifice you have to drain the water. What was written in the post by sjbar may be true if the pipes were made so strangely (the twig goes up and then down), but the description in the first post does not show that they are arranged in this way (it would be better to infer from the drawing whether photos). Yes, the description shows that the installation is not very well done (there is no way to work on gravity, but the pump should handle it).

There may be a silted orifice, a clogged (or stony) twig (feed or return, or both), bad crusting. What valves are there on these radiators? If modern (with a thermostatic head), the change of the coating is possible without draining the water, after unscrewing the head (there is a pre-setting under the head, which acts as a cone)

so how do I push it away or fix it?

Hello. I recently had a problem with the radiator that heats up to half temperature, even though the head was unscrewed to the maximum. Bleeding it was useless. So I unscrewed the head and there is an additional adjustment underneath. I shook it a little and the radiator heats up all over. Maybe that's the problem. Regards

rosenrot1987 wrote:

so how do I push it away or fix it?

I think you paid for the service. So why should you fix it? Advertise.

It is like this:
when the pump is connected to electricity, after about an hour, the smaller radiator in the smaller room heats up as needed (in this radiator I turned the valve under the head) and heats, in the other room with a larger radiator, after connecting the pump it heats up to 3/4 from the top (but in this particular radiator under the head there is no regulation with numbers from 1 to 6) after turning off the pump 10-15 minutes and the radiators only heat up at the top (practically only the grille is quite warm, the rest is cold. that you have to vent or that it heats because it has to heat only halfway up, it makes me an idiot and talks to him like that; /, the pump is certainly not too weak because it is grundson (I think it is written) and it is in the 3rd gear 90 or 100W and it is on this course all the time.

As for me (and it should be for you too), the radiator can be completely cold, so you have to reach the right temperature in the room.
For this reason, you advertise that the room does not reach the right temperature and he has to do everything to achieve it.

my specialist said that this is what it is supposed to be and I can kiss him on the ass, sorry, because he said that everything is ok, so I have to deal with this problem on my own

So you came across the company cockerel-Spartolił i ucik. Give me some pictures of this layout. It will be easier for all of us to determine what is the problem of non-heating ..

the photos will be added tomorrow morning

Tighten the valves of the other radiators and tell if the underheated one started to heat up. The soonest you have it, you now have badly balanced flows in the installation. And through this radiator, the water flows too slowly (many bends, siphoning, small cross-sections). And if so, it is the plumber's fault, unless you wanted to have it cheap and not good.

I wanted to have it well, of course, with the fact that I asked him if I would give the radiator under the window if everything would be ok, he assured me that it was, of course, it was not so for the next day we bought the pump because he assured that everything would be great as the pump was, we set up the pump and just the above-mentioned effect. This morning, when I lit the stove (until I turned on the pump), the radiators throughout the house were hot and in my beer cold as fix. only after turning on the pump they started to heat, I will attach photos in the next answer

Added after 1 [hours] 53 [minutes]:

I have a very important question:
Does it matter how a total of 7 radiators go to one riser and only 2 radiators go to another riser?
because I think to plug the return from my two radiators to the riser to which in total 4 radiators will be connected (along with my)

It is essential. But it largely depends on the cross-sections of the pipes on the risers and the individual branches for the radiators ...

I plan to recruit my foreman tomorrow to mount the heaters 40mm higher, because at this height the pipe is still warm (coming from the power supply mounted under the ceiling) and to rework and connect to this return, there are currently only 2 radiators supported

It's hard to say if this will help ... You could ask millions of questions when you are not dealing with this installation. What will you get by lifting the radiators when the pipe below is cool? It follows that you have no circulation. This will not change the fact that the radiator is cold. And if it's a pex pipe, isn't it sometimes broken somewhere on the bends?

rather there is a breakdown on the folds from what I was looking at.
so it turns out that the pressure is too weak and if I hook these radiators to the riser to which there are only 2 radiators and now 7, it can help, the previous spiral heater was higher and the heating was great

And have you tried to turn off other radiators to see if they will heat up? Often it is a question of crucifixion. And since the radiators are in the basement, they have the greatest pressure due to the water column.

yes, and they heat up more, but as I wrote above, one has this numbering from 1 to 6 under the head and the other does not have it and I do not know how to set it there

It may not have a ridge. That's why these numbers are missing.

Quite important. The sum of the individual flows must be equal at the input and output of the individual circuits. Otherwise, pressure differences will be generated between the circuits, which will be equalized by the shortest path for them (connected vessels), not always desirable for us.
greetings

can it be written more clearly? for I am glabem

The pump catches a simpler circulation so you do not have circulation through the radiators .. It cannot be easier to explain.

thanks beautiful,
it can be because after assembling the pump I have a less efficient boiler (one bath at home and lukewarm water) and there was a bathing for 3.4 people in front of the pump go ahead

Gentlemen, a slight refreshment of the topic:
One macher came and plugged in the WILO 4.5 W circulation pump and it started to heat up nice, but as he changed the valve on one of the radiators, because, as he said, what I had in a large radiator, very little water passes through, and after changing the valve at the power supply, the radiator started to heat up even better. of course, after disconnecting the pump, the problem returned, but it was smaller, because when it burns in the stove, in the 1st gear, with the pump on, I have a small heater almost all hot and a large one 1/3 hot (in the second gear 2/3 hot and adds that it is very big radiator)), and my question, from the power supply from another riser (which goes horizontally), there are probably 1.5 inch or 1 inch pipes and the connector that leads the power to my radiator is welded at an angle of 90 degrees (the power goes horizontally) and is 1/2 inch, is it because the ferrule is welded at an angle of 90 degrees and has a much smaller diameter than the supply diameter, the heaters do not heat up as they should? If I was welding the outlet at an angle of, for example, 45 degrees, would the pump better not push hot water to my radiators?
I greet everyone and thank you for the answers
ps please take a look at my lame picture