Replace Danfoss 3120 Thermostatic Head: Compatible Alternatives without Changing Valve

There is a way: turn off the valve with a thermostatic head (then the head must be mounted). When it is turned to the "unheated" position, it will not allow the heating medium to reach the radiator, unless the temperature in the room drops below +5 degrees (but this is impossible, especially in spring) - then it can let the minimum amount of water. But it's best to give caps. Maybe you could look for them at the flea market or at another bazaar?

Pablo_P-ce wrote:

Hello

I bought a Thermostat for CLARUS HT-5594 radiator, but I cannot fit any adapter to my Danfoss RTD-N valve. This is quite a popular valve and most apartments in my city are equipped with it. Should any of the adapters added to the set fit or would I need to buy another one? In the attachment I am sending a photo of the valve I have, a photo of the previous Danfoss thermostat and the CLARUS thermostat. I can add a photo of the adapters at another time. (according to the instructions, adapters are included: RA, RAV, RAVL, Herz)

Regards

Hello
I bought three of these heads for three different valves. At first I was disappointed - for two valves (one like yours) I couldn't mount these devices. No adapter fits. The key to success turned out to be unscrewing the adapter for Herz valves. The internal thread is too small, but after unscrewing two tiny screws, the threaded part falls apart into two clamps. I wrapped them around the threads of the valve and carefully tightened the screws. If you break the thread, it's probably only tiny screws with nuts that save. You need to screw it as much as possible because these threaded rings will not come together to the end and the second part of the adapter is held less well. In a valve like yours, you still need to shorten the shortest stem (for me to 7.5 mm) and insert it in the opposite way than stated in the instructions. You will insert it after screwing the adapter with the cap to the head. For me, the adaptation process was successful and time will tell how it will be in the season.

Put a self-tightening band around the valve
such a band can be bought for a few pennies, and after renovation you can simply cut and put on the thermostat

As for the assembly
then drill the RAV adapter about 1-1.5 mm

then wind thick insulation on the thread in the valve from which you disassembled the thermostat, then put the adapter and screw it tight.
It may be that it will not fully close the valve (it was like that for me)
so I used about 2-3mm extension (from the screw for mounting motherboards in the housing - I sanded it on both sides and put it on the pin)

My plumber messed up with the installation and threw old RTD-N valves into bathroom radiators and radiators with bottom connection VNH where there is an RA insert, all from danfoss.

The problem is that they do not produce heads for this unfortunate valve.
my problem was that the Danfoss head did not close the flow to the bathroom radiator, even if it was turned on, the radiator was warm.

It took me a lot of time and that's why I want to share it so that others don't waste their time unnecessarily.

I found a competitive Heimeier company that has a head for the RTD-N valve and the connection is the new RA (I did not mention these, although I like them on average, it's a waste of money because they work somehow).
The head that fits on the RTD-N is the DX head


Finding the code numbers was difficult because I couldn't find the website of the company recommended by the wholesaler, but I did. Heimeier is in a group with other companies and does not have a direct site, only a joint one.

I paid PLN 31 for it and finally I have peace of mind.

The page where there is more about this head is:
link

It works and the headache is gone, but it wasn't easy.
best regards

As you can see, I have an rtd-n valve installed in the original Convector.
And I am urgently looking for some intelligent electronic thermostatic head with a division into at least three time zones. But but that it should be set in relation to the valve at an angle of 90 degrees (such architectural conditions) because we have everything 11, cm. And probably nothing will fit together with the adapter. And it still needs to be screwed on.

Quote:

Hello

I bought a Thermostat for CLARUS HT-5594 radiator, but I cannot fit any adapter to my Danfoss RTD-N valve. This is quite a popular valve and most apartments in my city are equipped with it. Should any of the adapters added to the set fit or would I need to buy another one? In the attachment I am sending a photo of the valve I have, a photo of the previous Danfoss thermostat and the CLARUS thermostat. I can add a photo of the adapters at another time. (according to the instructions, adapters are included: RA, RAV, RAVL, Herz)

Regards

I did according to the attached instructions (not mine) and it works OK.

Hello everyone, I had a lot of such red caps for Danfoss valves, they are temporarily missing. greetings

Maybe a question not exactly on topic, but regarding Danfoss: after how many years should they be replaced?
You write that if they are mounted vertically, they wear out faster, but how do you know it? I have Danfoss horizontally, but they are already over 10 years old .... time to replace or not yet?

I have something like this on the CO radiator as at the beginning of the discussion as it unscrews from the sensor.
best regards

Hello.
I have these old Danfoss thermostats.

One of them has a broken leg (the one that goes under the nut and holds the thermostat straight) and now I had to tie it to the radiator with a string to make it work properly. I have a question what model it is and possibly what I can replace it with (because I probably won't find one because it's too old), because I have no idea about it. I will be grateful for your help.

Dear Colleagues, the red caps with female thread for adjusting these Danfoss orifice thermostatic valves have all been sold I do not own any. Please don't write. Regards.

Hello
I have a question about the Danfoss head.
It was damaged and I would like to replace it, it was installed over 12 years ago
I don't know what model it is or what to replace it with.
From the photos from the Internet, it shows that it is a Danfoss 3600/3610
Please advise.

Can't you buy the same?

olejopalacz2 wrote:

Can't you buy the same?

Dude, you understand what I wrote in the post above.
I don't know what model it is.
So instead of writing these types of answers, better not write anything at all.
Your answer has nothing to do with the topic.
It's best to be passive.

Take this head in your hand, go to the warehouse and they will give you the same one, they know it, they have catalogs.
So hard to do?

I will refresh a bit - I have several CosmoTherm Cosmoline heads in my apartment. Practically in each of them something is damaged (mainly the plastic legs at the valve). Visual inspection shows that I have Danfoss RTD-N valves which of the heads is best to choose:

1. Diamond DR - 600100005 Schlosser
2. Danfoss RAVIS 2945
3. HEIMEIER DX

Unfortunately, buying online is an option because there is nothing for this type of valve at an affordable price in my area

Hello
Please identify the head in the photo and possibly a replacement.
According to my info, it is a Danfos RTS 3600, screwed to the valve with a 32 wrench nut, to the RTD-N valve.
Thanks in advance

I have such a head
https://www.google.pl/search?q=RTD+3100&clien...LsAhVq-SoKHUFMCGEQ_AUoA3oECA4QAw&biw=412&bih= 643#imgrc=ze1or1CFuUpNjM

My plastic is completely cracked and I have to replace it, and since it is the heating season in the block, I will not replace the entire valve, only the heads. What can I replace it with because I can't find one and other companies don't like it.
rtd3100.

It can be replaced with a head service RTD 2945 (note that it is threaded, i.e. RTD and not RA). It fulfills practically all the functions of the old head, except for the "memo" ring, which it does not have (it is possible to lock the adjustment ranges, although it is done a bit differently than in the old heads). I have one screwed to the valve (I replaced one of the heads, as in the picture, with the RTD 2945. Then I bought it via Allegro. It is worth looking for it on Allegro or in good installation stores, or on the Internet.

It fits and works perfectly
Thanks

I need your help. I have a danfoss RTS 3600 head. Does anyone have one for sale or what other head can be replaced?

Hello. I'm refreshing the topic. What to replace or where to buy it? It is about the head for the Danfoss Link system, i.e. the Danfoss Living Eco head (014G0051). What's up with this Danfoss, does he want me to replace the whole system???

See this https://m.olx.pl/d/oferta/używana-głowica-danfoss-eco-living-używana-CID628-IDShFTl.html