Ok ,  thanks , but I thought that was the purpose of adjusting them , to get them where they need to be , especially same room size an temperature. Yes they do seem to be very sensitive at lower perameters IDE: nearly closed. Patience for me is required !

I will have a look at Heat Geek , thank you.

@alfapat Adjusting an LSV to provide a temperature setting is probably the start of a road to frustration and madness; as the name suggests, it is to balance the relative output compared with all others. Opening up one valve will to some extent, affect the available supply to all the others. (Hence the need to rough balance all the emitters first), then the ‘fun’ starts as each subsequent mini tweak should take you closer to the goal.

You will know if you are getting close as all the rooms will be equally in need of less or more heat from the source. If one stands out as not warm enough or too warm compared to the rest, then further tweaking may be required.

Once all the emitters are balanced, any change in the heat output of the boiler / heat pump will be equally reflected by all emitters (as long as one of those pesky TRV’s hasn’t poked its’ nose in of course!) The beauty of balancing the system is that the only adjustment day to day is then carried out by the system’s controller when it adjusts the heat source to hold your required comfort level. In the long term, just keep the adjustable spanner and a screwdriver to release the cover over the LSV if you decide that a particular valve requires a ‘nadgers’ adjustment to finesse your requirements. I have the great advantage of being retired and a nerd of the first oder - it all helps! Regards, Toodles.

HaHa , Im retired too and also have a need to be too fussy. I have read the Heat Geek so understand a little more , whatever my valves are , they are at least are all the same . I must say the adjustable spanner is a pain , some keys are ordered meantime . 

The first radiator From the pump missing out two at least on full throttle , is or has been more consistant on temp , sorry I didnt say that , Flow is what I searching for . If I count the turns from being shut I will make them all the same , Is that a better plan ? ....Then fine fettle.

Thanks!

And as a post script: When you commence the balancing exercise, you will be running around the radiators checking which is heating up the quickest (i.e., hogging the supply) and this where you start the job of restricting the flow by closing the LSV a little. I am going to go a stage further here and suggest that to save some time, you might like to close that valve completely, then open it up 1.5 turns as the throttling adjustment is nearly always in the last half turn or so from the closed position.

My first round of adjustments were at the end of a very mild February 2023 and so approximate settings only were used until the late Autumn of ‘23 arrived then I was able to continue to tweak in earnest. It helps if you are able start with cool radiators and ascertain perhaps the two or three biggest hoggers of the heat.

Assuming the system was calculated for heat loss of each room and the specified emitters are the correct capacity, then the apparent warmth from each emitter will be similar when balanced - thus room temperatures will also be similar. The science is not perfect but as long as the emitters are not underspecified, the tweaking of the LSV’s will allow you to achieve the comfort levels you seek. We like the same temperature in all rooms and areas except the bedroom at night and we have pretty well achieved this with the help of our Homely controller. Regards, Toodles.

Posted by: @alfapat

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Ok ,  thanks , but I thought that was the purpose of adjusting them , to get them where they need to be , especially same room size an temperature. Yes they do seem to be very sensitive at lower perameters IDE: nearly closed. Patience for me is required !

I will have a look at Heat Geek , thank you.

Perhaps I didn't make myself clear.  Let's make up a scenario and see if we can do better.

Suppose you want all rooms at 20C.  Your rads are successfully balanced when all rooms are at the same temperature, whatever it is (subject to the condition that at least one is fully open).

 Once you have achieved this there is no point further adjusting the rads.  Just adjust the ft.

Actually this is a good place to start whatever outcome you want.  You can tweak your individual rads up or down from this point in the.rooms that you don't want at 20.

Unfortunately patience is required as you say.

@alfapat I would think starting froma common 1.5 turns open would be a good start - unless there is an emitter at the end of the run that might suffer as a result. Regards, Toodles.

@toodles Do you think that the Rads I have in the large rooms , Kitchen and bathrooms should also be throttled down as in Balance and all be the same parameters despite there being a need for more heat.

Posted by: @toodles

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@alfapat I would think starting froma common 1.5 turns open would be a good start - unless there is an emitter at the end of the run that might suffer as a result. Regards, Toodles.

By way what do you suggest I do with two Rads on Frost setting , they are in a conservartory which is not heated.

Posted by: @jamespa

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Posted by: @alfapat

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Ok ,  thanks , but I thought that was the purpose of adjusting them , to get them where they need to be , especially same room size an temperature. Yes they do seem to be very sensitive at lower perameters IDE: nearly closed. Patience for me is required !

I will have a look at Heat Geek , thank you.

Perhaps I didn't make myself clear.  Let's make up a scenario and see if we can do better.

Suppose you want all rooms at 20C.  Your rads are successfully balanced when all rooms are at the same temperature, whatever it is (subject to the condition that at least one is fully open).

 Once you have achieved this there is no point further adjusting the rads.  Just adjust the ft.

Actually this is a good place to start whatever outcome you want.  You can tweak your individual rads up or down from this point in the.rooms that you don't want at 20.

Unfortunately patience is required as you say.

 

Also do I keep one fully open as it was in Hallway please.

@alfapat Start by throttling down the first to heat up, then the next to heat up…. ALL the emitters / radiators should be regarded as components of one system - this includes any and all emitters normally required to protect an area from frost.

The frost protection is going to be provided by a TRV I imagine as it is only at low temperatures that such emitters will be required to contribute heat. For setting up (balancing the emitters / radiators) those ‘frost protection’ TRV’s should be left fully open and not closed to the snow flake symbol position until after all balancing is complete. This may have some influence on the other emitters but I imagine they are not going to be opening / closing all the time so their influence should be minimal I think. Regards and Have Fun! Toodles.

@alfapat Remember Pat, as the outside temperature varies, so does your flow temperature. If you are not getting to room temperature today when its warmer, maybe you need to raise the lower end of the water law settings.

@Jamespa  Do you mean the temperature of the radiator rather than the room James? I suppose if the radiator is correctly sized, the outcome is the room at the right temperature.

Posted by: @bontwoody

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@Jamespa  Do you mean the temperature of the radiator rather than the room James? I suppose if the radiator is correctly sized, the outcome is the room at the right temperature

I mean the room.  I'm assuming that there is spread in radiator sizing in reality!