Balancing heating system

[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.