No its not a joke .

[townfanjon]

guys I am just interested in what would be your plan of attack on this one .

Large house, the home owner inherited this problem so we dont know if its been like this from day one ...
I am incredibly busy and dont even want to do it ..

18 ish rads , 35 kw vokera bag of shi* system boiler . 3 rads furthest away form boiler dont heat up .

No stuck trv pins , open l/s , shutting other rads of doesnt seem to make any difference .

I put a new pump in a fortnight ago , no difference.

As said just interested in where you would start. Go for it lol

Thanks in advance .

 

[ShaunCorbs]

Pump too small 25-80 pump needed

Also bet the expansion vessel is too small around 20 l needed

 

[Harvest Fields]

New boiler and powerflush. Old non return stuck?

 

[ShaunCorbs]

Pump too small 25-80 pump needed

Also bet the expansion vessel is too small around 20 l needed

Easy way to tell shut 5 rads do the others heat up ?

 

[townfanjon]

Pump too small 28-50 pump needed

Also bet the expansion vessel is too small around 20 l needed

Vessel wont make any difference to rads not heating, pump is genuine Vokera , so I dont really want to put another one in , but have no idea what size it is to be fair .

 

[Harvest Fields]

Easy way to tell shut 5 rads do the others heat up ?

He said he has tried that mate.

 

[townfanjon]

Easy way to tell shut 5 rads do the others heat up ?

Tried it , no difference ( sorry he has )

 

[ShaunCorbs]

Vessel wont make any difference to rads not heating, pump is genuine Vokera , so I dont really want to put another one in , but have no idea what size it is to be fair .

True but find there regularly undersized

 

[SimonG]

Zone it. Pump on each zone.

 

[ShaunCorbs]

Tried it , no difference ( sorry he has )

Try shutting all but them 3

 

[Harvest Fields]

Zone it. Pump on each zone.

 

[Welder]

Personally, Id start with shutting all rads down but one of the dodgy ones (opened up fully). See then if anything happens and try bleeding to see what emerges. Id then try closing the bypass, if there is one, to try to get it to force its way - turn pump up full pelt and bleed again.

If that doesn't get something through there is def a prob and you're busy for the next 5 years. If it does something, do same with other two till the crap is distributed.

You will also prob find you'll disturb a load a junk if its not been flushed recently. That then, as you well know, means **** loads more work...

Come on Town. If you need something doing, ask a busy man!!

EDIT: Bu66er. Missed the other posts

 

[townfanjon]

Zone it. Pump on each zone.

Erm a maybe , I will work out KW loading and I have a idea its running through 22mm zone valves , but not sure on how much they can cope with

 

[Chalked]

Fit a cheap low loss header to the boiler and a suitably sized pump,to the rads. Probably getting lots of restriction through the boiler.
Give it a good flush while your on.

 

[Chalked]

Erm a maybe , I will work out KW loading and I have a idea its running through 22mm zone valves , but not sure on how much they can cope with

55,000 through a 22mm zone valve.

 

[Harvest Fields]

Erm a maybe , I will work out KW loading and I have a idea its running through 22mm zone valves , but not sure on how much they can cope with

Should be 28mm with that many rads, shouldn’t it?

 

[townfanjon]

Fit a cheap low loss header to the boiler and a suitably sized pump,to the rads. Probably getting lots of restriction through the boiler.
Give it a good flush while your on.

Boilers too old mate , not worth the work and expence , think its about 9 ish years . Like most customers hes after a quick fix for this winter , maybe a new one next summer

 

[SimonG]

Not had three rads pipe up off all flows or all returns?

Trying to think out the box.

 

[Ben-gee]

Take off one dodgy rad and replace with just straight pipe, if that gets hot flush rad or replace it with new if that doesn’t work.

 

[townfanjon]

Should be 28mm with that many rads, shouldn’t it?

Yep think so , apparently BG put this lot in

 

[Harvest Fields]

Yep think so , apparently BG put this lot in

No comment.

 

[Harvest Fields]

Not had three rads pipe up off all flows or all returns?

Trying to think out the box.

Extension?

 

[ShaunCorbs]

Not worth getting involved if he wants a quick fix it won't work

 

[SimonG]

Cut a ups2 into the feed for the three rads and stick a 3 pin plug on it.

It really wanted to be sorted in the warm weather.

I'd be tempted to tell him to get three electric heaters and put some time in the diary when you are quieter.

 

[townfanjon]

I'd be tempted to tell him to get three electric heaters and put some time in the diary when you are quieter.

Lol, I am ready to do that when I see him , the 3 rooms are 2 bedrooms ( they dont use either of them ) other room is an office . Him , her and a 4 year old in a huge house . They want to walk round in bleeding T shirts and vests . The youth of today , gaud help us !!!

 

[Harvest Fields]

Lol, I am ready to do that when I see him , the 3 rooms are 2 bedrooms ( they dont use either of them ) other room is an office . Him , her and a 4 year old in a huge house . They want to walk round in bleeding T shirts and vests . The youth of today , gaud help us !!!

What’s wrong with that ?

 

[townfanjon]

What’s wrong with that ?

Yep that was my eldest daughter when she was at home , walked round in a vest in January, kept saying she was cold, left lights on , talked to her pal with the back door wide open etc etc etc , now she is a married mum , she now knows why she got moaned at . Shes now me reincarnated lol .

 

[chris watkins]

Fit a cheap low loss header to the boiler and a suitably sized pump,to the rads. Probably getting lots of restriction through the boiler.
Give it a good flush while your on.

It would be a lot cheaper to use close coupled tee's instead off LLH.
If there is room below the boiler it is easy to do & worth a go!!

 

[chris watkins]

based on 1.5kW x 18rads heat load is 27kW = flow rate of 0.3214L/s or 1,157L/h if the boiler is something like a evolve 30 it will have less than 100mbar residual head left for the system.
Hydraulic separation required via CC Tee's or LLH.

 

[townfanjon]

It would be a lot cheaper to use close coupled tee's instead off LLH.
If there is room below the boiler it is easy to do & worth a go!!

The boiler and cylinder are crammed in the corner of a utility, at the moment there is no room anywhere, boiler is around 9 years old (we think )
It wants starting again IMO.
I am back on Fri/Mon and will list rads etc and calc heating load and report back . Cheers