The above (modified) layout meets the results in green and the OP's symptoms (shutting off when in CH only mode) but still doesn't explain the result in red?
central heating only comes on with h water, stumped engineer
- Thread starter bonkersbill
- Start date
The above (modified) layout meets the results in green and the OP's symptoms (shutting off when in CH only mode) but still doesn't explain the result in red?
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And post some more pics
Then the experts can google over them for hours and post their comments!
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G
gaswizzard
23 pages and no further forward than the first page?
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Any more pics will have to be front or back of the house lol, i have given pics of every bit of viewable pipe.
Upgrademe's diagram of how the 28mm pipes are connected to the wrong ends ie flow and return has been the consensus since about page 10! Yes we have gained more of an idea with the extra pipework uncovered but we are still left with the same question, have these pipes been crossed. I for one have had enough of speculation and have decided to do my test of disconecting both ends of the 28mm blue pipe on upgrademe's diagram and im going to pour water down it because it should be one pipe from the bottom of the cylinder to the top of the boiler if it is wrongly connected as per upgrademe's diagram, the water will come out of the 28mm pipe to the top of the boiler if this is how it has been connected, if so i will swap the 28mm pipes over at the mid way point upstairs between the cylinder and the 90 degree angle down to the boiler as this is the only place i can easily access. If they are connected correctly it will not work out quite as well but at least we will know if they have been crossed. Unless anyone can tell me this definatly wont work and why, i will do this tommorrow. My missis has had enough and has called out another engineer who is going to charge £100 an hour, and if this post has anything to go by and the previous engineers, i wont be getting any change out of £1000.
Upgrademe's diagram of how the 28mm pipes are connected to the wrong ends ie flow and return has been the consensus since about page 10! Yes we have gained more of an idea with the extra pipework uncovered but we are still left with the same question, have these pipes been crossed. I for one have had enough of speculation and have decided to do my test of disconecting both ends of the 28mm blue pipe on upgrademe's diagram and im going to pour water down it because it should be one pipe from the bottom of the cylinder to the top of the boiler if it is wrongly connected as per upgrademe's diagram, the water will come out of the 28mm pipe to the top of the boiler if this is how it has been connected, if so i will swap the 28mm pipes over at the mid way point upstairs between the cylinder and the 90 degree angle down to the boiler as this is the only place i can easily access. If they are connected correctly it will not work out quite as well but at least we will know if they have been crossed. Unless anyone can tell me this definatly wont work and why, i will do this tommorrow. My missis has had enough and has called out another engineer who is going to charge £100 an hour, and if this post has anything to go by and the previous engineers, i wont be getting any change out of £1000.
You're still not listening.
The pipes from the boiler will virtually go straight through the wall, so it should be a piece of cake to mark them where they go up the wall.
As for paying someone a £100 an hour, more money than sense comes to mind.
This is my last post until you do my tests so have fun.
Pssst, for £1000 he can rip the lot out and re-pipe it.
The pipes from the boiler will virtually go straight through the wall, so it should be a piece of cake to mark them where they go up the wall.
As for paying someone a £100 an hour, more money than sense comes to mind.
This is my last post until you do my tests so have fun.
Pssst, for £1000 he can rip the lot out and re-pipe it.
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The problem is the pipes go through the chimney at 45 degrees almost side by side, by the time they get to the top they are front to back and are boxed in, i cant tell which is which. Can someone please tell me why pouring water down the 28mm pipe from the bottom of the cylinder wont prove that it is the same as the top 28mm to boiler if water comes out of this when its disconected?
That sounds like an excellent idea to me.
How does your wife's engineer manage to charge 238% more that I do for two hours? He must be good!
You do need an RGI to test the flue and reconnect the firefront and test for no gas leaks.
Tony
How does your wife's engineer manage to charge 238% more that I do for two hours? He must be good!
You do need an RGI to test the flue and reconnect the firefront and test for no gas leaks.
Tony
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Looks like im on my own then, i will let you know how i get on. if it still does not work when i have it all back together i will run your test for the 3rd time Doitall though i dont know what is expected to have changed though by this time the 28mm pipes may be swapped over.
do whichever tests you req Bill, but you will have to Identify the boiler flow but it is looking like the flow and returns are crossed, I have marked up your drawing to show what i think is happening and removed some rads for clarity
View media item 44061
valve in hw position water flows through boiler (the wrong direction)
valve in mid position as above but there is also forced circulation in the rad circuit which picks up heat via mixing at the injector tee
valve in ch position no flow through boiler whatsoever so it cuts out
Matt
View media item 44061
valve in hw position water flows through boiler (the wrong direction)
valve in mid position as above but there is also forced circulation in the rad circuit which picks up heat via mixing at the injector tee
valve in ch position no flow through boiler whatsoever so it cuts out
Matt
What you have there matt!e is what we drew on page 12.
I Know mate (sorry I should have said what we think) I just thought I'd mark the ops up and explain how the rads are heating up (before anybody asks or points out that they wouldn't)
Matt
LOL! I have been away, and come back and we are on page 23! at this rate I think we will solve this mysterious problem surely before page 30 is up.
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