One pipe system

kscobie

Unusual one lads, oil boiler replacement job, small system, only 7 radiators, on a one pipe system. Primary circuit is 3/4", rads are about 10 years old, no hot water (community hall), system power flushed, same circulating pump, but heat will not rise into rads.
Boiler heats up, pipework heats, and returns normally. He tried balancing, opening fully, everything possible, but no joy.
Rads are bottom entry, opposite ends, myson rad valves. He removed each rad, let a bucket of water from each end, no problem.
Poor chap is mystified, I have not seen the job(2 hours away), any ideas????

gifted

Any part of the rads get hot?...strange to see BOE rads on a one pipe

corkgsxr

Is it not normally bottom to top entry, opposite ends for one pipe

Cerco

Has he checked the feed from the F/E tank?
Is the bottom of the rads heating?
Is there a difference in temperature between the flow and return?

gifted

Did it get sorted?

Outkast_IRE

corkgsxr wrote: »

Is it not normally bottom to top entry, opposite ends for one pipe

Yes it is, honestly haven't seen bottom entry only on a one pipe system before.

scudo2

kscobie wrote: »

Unusual one lads, oil boiler replacement job, small system, only 7 radiators, on a one pipe system. Primary circuit is 3/4", rads are about 10 years old, no hot water (community hall), system power flushed, same circulating pump, but heat will not rise into rads.
Boiler heats up, pipework heats, and returns normally. He tried balancing, opening fully, everything possible, but no joy.
Rads are bottom entry, opposite ends, myson rad valves. He removed each rad, let a bucket of water from each end, no problem.
Poor chap is mystified, I have not seen the job(2 hours away), any ideas????

Try turning down the speed of the pump to lowest setting and it should work.
If pump is to strong then its fighting against the natural convection to rads.

Let us know how you get on.
Hope this works as I've also seen this happen. Nice slow slow flow and be patient as rads will be slow to heat in that type of system.

scudo2

It would be nice + polite if people let us know one way or the other how they got on as were giving our time and free ( + varied) advice trying to help them out.

scudo2

scudo2 wrote: »

It would be nice + polite if people let us know one way or the other how they got on as were giving our time and free ( + varied) advice trying to help them out.

No reply ............yet.........!

Dtp79

scudo2 wrote: »

No reply ............yet.........!

Welcome to boards!!

DGOBS

Don't think he's being rude guys, he hasn't been logged on since his last post.

scudo2

DGOBS wrote: »

Don't think he's being rude guys, he hasn't been logged on since his last post.

I'm just talking in general to replys, a lot of ye have been around on boards.ie a long time, do ye get annoyed about lack of thanks for your free professional advice to strangers, at least we sort of know and appericate each others opinion, even if it conflicts. !

Robbie.G

scudo2 wrote: »

I'm just talking in general to replys, a lot of ye have been around on boards.ie a long time, do ye get annoyed about lack of thanks for your free professional advice to strangers, at least we sort of know and appericate each others opinion, even if it conflicts. !

.It sometimes can be a little annoying but that's the way things are.You will get used to it

kscobie

Sorry for the delay lads, became a grandad again since :D:D:D:D:D



Its a guy that I worked with in the past, but he could get no heat into the rads

Pump was turned up and down, on the flow and the return, pump changed for stronger pump.

Its on a sealed system, and the boiler seems going fine.

I personally dont think it ever worked, but I will be chatting him tomorrow, and will update then

gifted

kscobie wrote: »

Sorry for the delay lads, became a grandad again since :D:D:D:D:D



Its a guy that I worked with in the past, but he could get no heat into the rads

Pump was turned up and down, on the flow and the return, pump changed for stronger pump.

Its on a sealed system, and the boiler seems going fine.

I personally dont think it ever worked, but I will be chatting him tomorrow, and will update then

Congratulations...at least that one pipe worked

shane0007

kscobie wrote: »

Sorry for the delay lads, became a grandad again since :D:D:D:D:D

What & you think that's a good enough excuse not to reply to the very annoyed few awaiting your response!!!

;-)

scudo2

shane0007 wrote: »

What & you think that's a good enough excuse not to reply to the very annoyed few awaiting your response!!!

;-)

Good enough excuse in my book.congrats and no pictures required for this post.