Balancing heating system

[slacky]

Hey guys

I'm trying to Balance my heating system to get the best out of it but looking for some advice.

I've gone round and opened the lockshield to give 12 degrees between flow and return pipes and seems plenty of heats coming off the rads

Then once it's all cooled down turned the heating back on and find some rads are taking a lot longer to heat up than others. So I close the lockshield quarter a turn which seems to help the rads not warming up.

The rads that was heating up first are hot to touch but not much heat coming off them.

Any advice would be appreciated as what ever i do can't seem to win lol

 

[Rickster123]

Croppies got a great link for balancing. I'll give him a nudge for you.

 

[slacky]

Thanks mate

 

[Dotty]

Somewhere anyway. Not tried attaching it from the tablet....

Hang one.

 

[slacky]

Did u manage to sort it? I'm on my phone not sure if I have to go on the desktop site to view it

 

[Rickster123]

Give him time slacky. It's Tuesday night, bath night in the croppie house. He'll be back.

 

[slacky]

Sorry mate lol. Didn't know if tapatalk shown attachments or I had to view on the desktop site

 

[snowhead]

Just how many Kettles does it take to fill a tin bath (free standing rolled edge of course)?

 

[rpm]

That depends on the volume of displacement within the bath capacity. Anyone want to guess at croppies volume of displacement in the measurement of pints? lol

 

[PhoenixServices]

Half a pint

 

[Dotty]

Sod off all of you. Bath night isn't until October. Tonight was a lodge night.

Slacky, bear with me cocker, I can't do it off the tablet but I'll set something up as soon as I wrestle the pc off the GSC when I get in on Wednesday.

 

[slacky]

Thanks mate

 

[Dotty]

http://www.ukplumbersforums.co.uk/c...115-croppies-balancing-thread.html#post845146

 

[slacky]

http://www.ukplumbersforums.co.uk/c...115-croppies-balancing-thread.html#post845146

Thanks mate but that's the instructions I've followed to balance the system. Went round every rad and got 12 degrees between them but now some take a lot longer than others to heat up.

 

[lame plumber]

tweak them open a tadge more

 

[slacky]

Is checking which ones heat up first to show the order they go in from the boiler? Not long had the pipe work refitted so know the routes and which rads are closet. I'm going to redo the balancing tomorrow. Do you mean open the ones taking a while a little more? Is a quarter of a turn to much?

 

[Dotty]

Closest physically isn't necessarily closest hydraulically.

 

[slacky]

Will start from scratch see how I get on. I didn't do the order they heat up just the order they go in

 

[slacky]

Having another go and managed to get all rads up stairs to the right temp across flow and return but came down stairs and all 3 rads are cold

 

[doitmyself]

Try this method:

1. Remove all TRV heads and set any wheel valves to full open
2. Adjust all lockshield valves to 1/3 turn open
3. Get the system up to temperature (Set room stat high so the boiler does not modulate down.)
4. Measure the differential at boiler and across each rad.
5. Open the LS valves of rads with a relatively high differential by 1/12 turn or less.
6. Wait 5 - 10 minutes
7. Recheck all differentials
8. Repeat from 5 until all differentials are approximately the same.

Do not expect perfection.

It's more important to have a consistent differential than to have a specific temperature as this may not be achievable.

If the differential is less than 10C set the pump to a lower speed; if greater than 20C set to a higher speed.

 

[slacky]

Try this method:

1. Remove all TRV heads and set any wheel valves to full open
2. Adjust all lockshield valves to 1/3 turn open
3. Get the system up to temperature (Set room stat high so the boiler does not modulate down.)
4. Measure the differential at boiler and across each rad.
5. Open the LS valves of rads with a relatively high differential by 1/12 turn or less.
6. Wait 5 - 10 minutes
7. Recheck all differentials
8. Repeat from 5 until all differentials are approximately the same.

Do not expect perfection.

It's more important to have a consistent differential than to have a specific temperature as this may not be achievable.

If the differential is less than 10C set the pump to a lower speed; if greater than 20C set to a higher speed.

Tried that, turned all rads to 1/3 open and none of the down stairs rads got warm so turned the upstairs to 1/4 and down stairs to 1/2. All rads heated up. Temp difference was around 16-18 difference. Went round all rads to get roughly that now upstairs are heating up but down stairs taking a lot longer.

Close to giving up is it so much to ask to have a heating system that works lol

 

[lame plumber]

not being funny but if they all heat up what isnt working?

 

[slacky]

Upstairs rad are hot within 10-15 mins down stairs are taking over half an hour

 

[Radioman]

I suppose it makes a difference if the lock shield is on the flow or the return?

 

[stevetheplumber]

close up stair down open downstairs up