Existing problems with central heating system (new build)

[deefadog]

Top stuff, thanks steve! when you mean turn boiler off, can i just set the system to frost setting i.e 5 degrees C. as i don't fancy turning it off at the wallin case i can't get it started again, especially as it's gone cold again.

Thanks again!!! really appreciated

 

[plumbnuts]

Because by isolating the boiler you have in effect reduced the water content that the guage is measiring to just a few litres. If the leak is in the heat exchanger the guage will drop quickly, so your boiler should not need to be off for long

 

[deefadog]

Aha i see thanks! Will give it a go!

 

[plumbnuts]

let me know how you get on

 

[deefadog]

Will do! Pity you not in south wales, i'd commission you to sort it out 🙂

 

[deefadog]

Hi, have not had a chance yet, been away with work, But will get on with this, this weekend.

Also i'll get that diagram sorted also.

 

[jskdog]

I have exactly the same problem as soon as i switch the hot water on the prv lets water out the top of the tank, i have noticed that on one of the expansion tanks (the one with the gauge)a tap to it is switched off, does this need to be on?

 

[deefadog]

Hi, no the tap i assume is the filling loop to top the system up. This is the original problem i had and has since been corrected, some pipes were installed the wrong way. You could also have a faulty PRV - I think they are set to release (open) at 3 bar pressure - check the gauge and see if it goes up passed 3. You'll prob have to let the heating and hot water be off for 4 hours and refill with the loop to get the gauge back to 1 bar (or what ever it should be).

 

[jskdog]

Just tried attaching some photos not sure if it worked?

 

[deefadog]

Nope can't see anything?