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Old 24.10.2014, 11:45
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Underfloor heating-how to put it on??

Hi guys please help me if you know more than I do.

I moved in new apartment and have a terrible cold, want to turn on the heating but it is not working???
My landlord is not answering on calls too. On the valve for heating in my room I put 5 (nothing happened) then in another room behind the wardrobe I found bunch of valves (few weeks ago repair man was changing something there and told me that "there" I am turning the heating on. But where? Moved this red valve and the pipes became warm but after 40 minutes floor was not any warmer.

Suggestions?Am I just stupid?
Thank you
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Old 24.10.2014, 12:03
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Re: Underfloor heating-how to put it on??

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Seems to me like you need to get the uranium rods retracted into the core once again.

Not a task for the inexperienced.
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Old 24.10.2014, 12:14
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Re: Underfloor heating-how to put it on??

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Moved this red valve and the pipes became warm but after 40 minutes floor was not any warmer.

Suggestions?Am I just stupid?
Thank you
It takes an hour or two to notice a difference in the floor temperature.

Things to check:
  • Is the pump on (listen)? It's the thing behind the white control box in your photo.
  • Is there a flow of water in the pipes? (Look at those little glass vials on the "fuel rods". There is a flow rate in l/m on them.
  • Are all the pipes warm or just those on one side of the "fuel rods"?
  • When you turn a room thermostat fully on, after a few minutes, does the top of one of the valves pop-up? (The valves are the large diameter things in the top of your pipes picture).

Get back with the answers and we can go from there.
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Old 24.10.2014, 12:43
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Re: Underfloor heating-how to put it on??

Is the pump running, can you feel it vibrating a little? There is a time switch on top of the pump, is it on?

Are all the electrical switches correct in the fuse box?
Have you asked your neighbours for help?

Do not fiddle with the group of 7 flow adjusters!

In photo 1 the red tap is on. In photo 2 you have turned the heating off...
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Old 24.10.2014, 12:48
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Re: Underfloor heating-how to put it on??

Hi Tom thank you for such a quick replay.

So I turned this red valve once again and it is working for 25 minutes now( i turned it off after 40 minutes when I did not noticed temperature changing-because of that is turned on third picture)
First of all I definitely hear pump working.
I do not see the flow of the water but I realized that on 3 of glass vials red scale got bit higher (and only those pipes are warm) This is a good sign?

I asked two neighbours ( I know only them) and it looks like that they know less than I do
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Old 24.10.2014, 12:53
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Re: Underfloor heating-how to put it on??

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Hi Tom thank you for such a quick replay.

So I turned this red valve once again and it is working for 25 minutes now( i turned it off after 40 minutes when I did not noticed temperature changing)
First of all I definitely hear pump working.
I do not see the flow of the water but I realized that on 3 of glass vials red scale got bit higher (and only those pipes are warm) This is a good sign?
Yes. I'd leave it for a few hours and see if your room gets warm.

How many of those thermostats are there in the flat?
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Old 24.10.2014, 12:58
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Re: Underfloor heating-how to put it on??

Most of these shared heating systems in apartments are set to run either during the daytime, or only at night. It may not be set to run 24 hours. You might ask your landlord so you know.

You have 7 rooms? If you are not using the others, perhaps you can turn down the others to concentrate the heat to your location.
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Old 24.10.2014, 13:00
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well I have seen four of them,3 rooms and living room(did not saw it in bathrooms or kitchen) but since my roommate has so much furniture I am not sure that there are not more of them ( I thought that it has same number as those glass vials?)
And yes, now I see water floating as well.

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Most of these shared heating systems in apartments are set to run either during the daytime, or only at night. It may not be set to run 24 hours. You might ask your landlord so you know.

You have 7 rooms? If you are not using the others, perhaps you can turn down the others to concentrate the heat to your location.
I have turned others off since I am not using those rooms, I turned it on only in living and my own room. Whole flat consists from 3 bedrooms, 2 bathrooms, 1 kitchen and living room

Last edited by 3Wishes; 24.10.2014 at 16:35. Reason: merging successive posts
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Old 24.10.2014, 13:10
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Re: Underfloor heating-how to put it on??

Sorry to hear about your cold.

You should not turn the heating off - turn it down very low in rooms you are not using but not completely off.

(Many rental contracts stipulate that you should not turn the heating off)

Underfloor heating takes time to heat up.

I have heaters for sale if you are very cold.

http://www.englishforum.ch/items-sal...-stations.html
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Old 24.10.2014, 13:25
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Re: Underfloor heating-how to put it on??

Be aware that the temperature of the fluid in an underfloor heating system will not reach much more than 25deg C with current temps. Maybe even less. Ours is at 21deg.

You shouldn't need to fool around with the valves in the cupboard once it is balanced...
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Old 24.10.2014, 14:34
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Re: Underfloor heating-how to put it on??

In your picture, top left, the red tap/flow valve is open - when it's in line with the pipe.
In the picture below, left it is closed, when it's perpendicular across the pipe.

Your picture on the right, is of the room thermostat. Each number from 1-5 will equate to a temperature that when reached, will shut off the flow to underfloor pipes. The higher the number, the higher the room temperature will be, before shutting of the warm water flow. In theory, when set at 5, this is often above the temperature that that the room will reach, so will not normally shut off, ensuring continual flow (may or may not be the same for your system).

The problem could be with this and the internal solenoid/valve could be sticking. You can test, by slowly turning the knob from minimum up to maximum. When you you turn through the actual room temperature the shut-off valve within should close.
There will be a dull thud, when this happens - not really one you hear, but more feel through the knob itself (again, I can't guarantee, this is the same for your system).

From the thermostat knob runs a wire to the heating control/pipes where the flow valve is normally situated.

My heating works on average temperature changes over 24-48 hrs. and won't react to the first extreme fluctuation. However it is already working.

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I have turned others off since I am not using those rooms, I turned it on only in living and my own room. Whole flat consists from 3 bedrooms, 2 bathrooms, 1 kitchen and living room
You should heat all rooms and leave doors open - as mentioned above the water won't heat up too hot, and this type of heating won't instantly create heat in just one room.

Last edited by TiMow; 24.10.2014 at 15:02.
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Old 24.10.2014, 16:20
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Re: Underfloor heating-how to put it on??

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Hi Tom thank you for such a quick replay.

So I turned this red valve once again and it is working for 25 minutes now( i turned it off after 40 minutes when I did not noticed temperature changing-because of that is turned on third picture)
First of all I definitely hear pump working.
I do not see the flow of the water but I realized that on 3 of glass vials red scale got bit higher (and only those pipes are warm) This is a good sign?

I asked two neighbours ( I know only them) and it looks like that they know less than I do
Perfect sign that the heating is running and working. Just give it time, it has to heat first the whole floor than it will heat your room as well.

5 is maybe a bit high. You will find that setting around 2 are most comfortable and economical.

About economical: In your first picture the white thingy with the display is the heat counter. It keeps track how much heating energy you use, and you will be billed accordingly. If you use more energy then you paid with your Nebenkosten you have to pay more, if you use less you will get money back.
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Old 24.10.2014, 16:54
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Re: Underfloor heating-how to put it on??

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You should heat all rooms and leave doors open - as mentioned above the water won't heat up too hot, and this type of heating won't instantly create heat in just one room.
Can I ask why you think this?

If all rooms were supposed to have the same temperature, then why would each room have a separate thermostat?
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Old 24.10.2014, 18:11
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Re: Underfloor heating-how to put it on??

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Can I ask why you think this?

If all rooms were supposed to have the same temperature, then why would each room have a separate thermostat?
Just to get the whole apartment up to temperature, in the shortest time.
If just one room only was heated, it would lose heat every time the door was opened.

I believe it to be a false economy not to heat all rooms - yes, not all necessarily to the same level, but after the OP feels warm enough, then they can adjust the other rooms accordingly - but I suggest, not to zero.

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Perfect sign that the heating is running and working. Just give it time, it has to heat first the whole floor than it will heat your room as well.

5 is maybe a bit high. You will find that setting around 2 are most comfortable and economical.

About economical: In your first picture the white thingy with the display is the heat counter. It keeps track how much heating energy you use, and you will be billed accordingly. If you use more energy then you paid with your Nebenkosten you have to pay more, if you use less you will get money back.
I took that to be the flow pump, which can be adjustable, hence the display, but I'm just guessing due to the position and fitting.

If I was to be right, then by upping the flow rate may help - but probably not for the OP to do.
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Old 24.10.2014, 18:36
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Re: Underfloor heating-how to put it on??

We generally have our heating on a low setting - firing up the fire in the living room in winter - primarily because there is little point heating the whole house - partly because we don't use (certain wings) and partly because the windows are so badly insulated!!
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Old 24.10.2014, 18:44
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Re: Underfloor heating-how to put it on??

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I believe it to be a false economy not to heat all rooms - yes, not all necessarily to the same level, but after the OP feels warm enough, then they can adjust the other rooms accordingly - but I suggest, not to zero.
We have it turned off in our bedroom. Economy doesn't come into it. We want to sleep in a colder room.

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If just one room only was heated, it would lose heat every time the door was opened.
No really with underfloor heating. When you do the Swiss airing with all windows open each morning (or evening, or both), the internal air temperature soon returns to normal.
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Old 24.10.2014, 19:54
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Re: Underfloor heating-how to put it on??

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We have it turned off in our bedroom. Economy doesn't come into it. We want to sleep in a colder room.



No really with underfloor heating. When you do the Swiss airing with all windows open each morning (or evening, or both), the internal air temperature soon returns to normal.
I guess it all depends on the heating system. Ours runs for 23 hrs. a day (just centrally switched off for the statutory hour between 11 and 12). But during the night hours the temperature setting is several degrees lower than the day time setting, but is still ticking over.
If I can get away with it, unseen, then I can also turn the thermostat down (but not off) and open a window ...... but the Swiss are nesh, so I seldom do.

With our system, there is no quick, instant heat boost, so it ticks over the whole time. But I still believe it to be more cost effective to keep it ticking over, with small fluctuations than to heat/cool/heat/cool.
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Old 25.10.2014, 00:27
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Re: Underfloor heating-how to put it on??

Well guys thank you so much for all the replays. My heating is WORKING. I really just needed to wait bit longer (and I was not familiar with this heating system)

I have put thermostats on five and will leave it till tomorrow and then put on two just to keep normal temperature (because today was soooo cold, at least for me)

Thank you so much once again, Marina
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