Calibrating New Danfoss Radiator Heads: Cold at Levels 1,2,3 - DIY Guide Inquiry

Hello, I have new radiators and new valves and heads as in the picture. The professional assumed everything in the summer season so there was no way to check the head settings, they were all 5 at the moment. Currently, major frosts appeared and the cooperative added to the furnace and a problem appeared because the head as set to OFF and at levels 1,2,3 are radiators cold completely and just turn it a little over 3 then they start to heat and it's terribly bad (lack of summer levels and poorly warm).

How can I calibrate the heads myself? After removing the head, you can see that the ring has a maximum position (number 7 on the line which I marked with the arrow). Is this line engraved on the valve just that landmark, or should you lean on another point? If on another then which one. What ring value should be set for the above waypoint and how to put on heads later to make it good?
Head like photo 1 with OFF value or head like photo 2 with maximum value?

What temperature do you have at home?

Between 22 and 23 usually.

So do not tap on these valves after reaching the set temperature in the room close the heater.

mietek654 wrote:

So do not tap on these valves after reaching the set temperature in the room close the heater.

But I mean, can it be set so that it heats easier when the thermostat clicks when the temperature drops. Currently, when the thermostat fires up the radiator, it heats up a lot right away.

Setting the valve to 7 opens it completely when the thermostatic head is activated. As you have already removed the head, you can change the settings up to 2 and observe the reaction. Additional information here:

http://products.danfoss.pl/productrange/docum...wory-termostatyczne-z-nastawa-wstepna-ra-n/#/

monkey22 wrote:

but I mean if it can be set so that it heats lighter when the thermostat clicks when the temperature drops. Currently, when the thermostat starts the radiator, it heats up a lot.

Not really - the radiator will be lukewarm only in favorable conditions and only when the air temperature in the room matches the set one. A little cold and it will open quite, a little warm and close. The radiator temperature cannot be set on this valve. Setting 3 in most heads corresponds to an air temperature of about 22 ° C, so if you have such a room temperature, up to 3 the radiator should be quite cold.

Thank you very much for your help Regards - another dose of knowledge coded.

TomaszC. wrote:

Setting the valve to 7 opens it completely when the thermostatic head is activated. As you have already removed the head, you can change the settings up to 2 and observe the reaction. Additional information here:

http://products.danfoss.pl/productrange/docum...wory-termostatyczne-z-nastawa-wstepna-ra-n/#/

I advise you to reduce the pre-setting slightly, because e.g. a reduction from 7 to 2 may cause that when you really need heat (large frost, especially with the wind towards the window - the wind is worse than frost) the radiator will not heat the room. So for starters, from 7 to 6.

The presetting is also not used to control the temperature of the radiator itself. It is used for hydraulic regulation, e.g. if some radiator does not reach water, by setting it you reduce the flow on the radiator that heats best (usually it is the radiator closest to the riser or power source or the one to which the thickest pipe leads). The maximum flow is the N setting on the valve.
You don't have influence on the temperature of the medium because you have power from the cooperative, so as your colleague wrote to you above - the head works on / off and regulates the air temperature in the room, not the temperature of the medium / radiator

Approx. thank you. So the landmark on this valve is that line, right? Should I put on the head later as in picture 2 (cold) or picture 3 (max)?

Yes, the line is the reference for the initial setting (with the head removed from picture 1)
Settings on the head from * to 5 are room temperature settings and you set yourself as you like (for comfort) Usually it is a setting between 3 and 4
https://goo.gl/images/oBCTZA

hajtaler wrote:

using the setpoint you reduce the flow on the radiator

So you can influence the temperature of the radiator. Because the less the heating medium (slower flow), the greater the temperature difference between the entry and exit of the radiator. So better cooling it.

PS. In my previous post I made a typing error. Instead of "you can change settings", it should be "you can change settings".

The presetting, however, has an impact on the radiator temperature. Let's say there is a wind straight into the window (leaking), outside minus 15. The head senses the temperature drop in the room and tries to release more heating medium. If the initial setting (the one after removing the head) was in position 1, then despite the feeling of coldness in the room by the head, the radiator will be barely summer (it will almost not heat), while at setting 7 it will be all hot (until the head senses a rise in temperature and will not choke the flow).

TomaszC. wrote:

hajtaler wrote:

using the setpoint you reduce the flow on the radiator

So you can influence the temperature of the radiator. Because the less the heating medium (slower flow), the greater the temperature difference between the entry and exit of the radiator. So better cooling it.

I agree, of course. We also adjust the amount of flow - my mistake. The only question is whether the system will start to hum with appropriate damping of the flow (depends on the pump power and pipe cross-sections) and whether the room will heat up (if the radiator matched with the power and supply temperature is not, if the oversized radiator is yes)
You should also be aware that changing the presetting with one radiator can cause changes in the flow in the others and you will also need to change the settings with them.
In a word, you have to try it, it costs nothing.
In addition, it seems to me that the author wanted you different because he thought that the setting on the head just sets the temperature of the radiator and not air. It was the same with my friends - they wanted to throw away the thermostats because they said it was not working. I asked what was happening and they said that on 1,2,3 cold radiator and after exceeding 3 immediately hot radiator and up to 6 the same. So that ...