Some info required for radiators that aren't performing so well!

[shorticus]

I havent seen any water triccle out but it does tend to loose little pressure every few days, with no signs of leak on pipe work, so assuming it is the PRV

then you're probably right about needing extra space for expansion, not sure it'll cure the heating issue though

 

[hary_j]

one other thing to have a quick check on is the internal auto by-pass, could possibly have a bit of debris on the seat

Could give it a go, but doubt very much as it doesnt look like a very old installation with minimal use!

 

[shorticus]

Could give it a go, but doubt very much as it doesnt look like a very old installation with minimal use!

worth a look just to eliminate it, someone on here last week had a bypass problem so it can occur from time to time.
Make sure you let us know how you get on Hary-j, good luck with it mate

 

[hary_j]

So what you reccan gents??, time for a replacement to a vaillant ecotec 46kw or 65kw??

Really don't wanna have to tell my mate this :-(, so if i can cure it more better!

 

[ecowarm]

looks like a shortfall , 28kw output on boiler and a load of 35kw on rads

 

[hary_j]

yep unfortunately it does. Big shortfall

 

[ecowarm]

dont replace the boiler just add a small system boiler to back it up

 

[hary_j]

Problem is where it is located, space it very very minimal as it goes..

 

[SafeGasInstall]

Has any one ask if is been pipe sized correctly , not that will make big diference as is only 28 kw! I fit 40kw regular boiler on uhwss and about 20 large rads in large house ! Quick and easy heat up and customer well happy in this cold days we having now!

 

[hary_j]

luckily all the pipe work is visible and is in 22mm from boiler, with 15mm tail off's to the rads!

 

[hary_j]

Re: Some info required for radiators that aren't performing so well! "UPDATE"

Thanks for your posts fella's!...

We've come to a solution and decided that the boiler will now be removed and replaced for a "Vaillant ECO TEC 65kw system boiler".. The boiler will be used as Heat only and will have the secondary pump (Already installed) help maintain the flow rate around the Rads! as well as the new boilers pump!

As for the Hot water i will be installing one of them latest stubby instantaneous water heaters.

Before i get blasted about Gas safe!, lol!

Please note - i am not Gas safe/Corgi registered. All my GAS work is carried out with supervision from a pal who is Gas safe and will issue me a certificate on completion..

 

[ecowarm]

You have approx. 35kw of rads why are you going for a 65kw boiler?

 

[hary_j]

35kw is what it rounded upto 1st with my figures, i measured up the rads properly this time and they are infact 700x1400's DCDP, they are 200mm wider and 100mm more in height, and also adding on for the pipe run (approx 32metres).

Each rads output is 8274 BTU = 2.42 KW
x by 15 rads + say another 3kw for pipe runs = 39.3KW

Also in a years time there is possibility that there may be extra individual rooms built, so allowing for them too..

So there's no point in stretching it again, cos there almost 40kw there already and you only got another 6kw to play with..

so thats why i had the 65kw in mind..