ocean combi boiler

[1974lynne]

Hi just a quick thing need to ask.my ocean combi boiler is about 9 years old and just had it serviced about three weeks ago pressure is down when system is off and now it keeps clicking on and off all the time it heated the radiators up quite a lot in one day what shall i do
1974 lynne

 

[Bahco]

Repressurise the boiler

If it goes down again you have a leak

 

[gas4you]

Could be that service engineer opened pressure release valve to test it and it hasn't re-seated correctly. Quite common. Is it dripping from PRV pipe ouside?

I suggest you call service chap back to inspect.

 

[Agile]

Could be that service engineer opened pressure release valve to test it and it hasn't re-seated correctly.

He should have known better!

Even Vokera tell you in the front of their MI that the PRV should never be used to drain the boiler.

Call him back as its his fault ( if its dripping from the vent outside that is).

Tony

 

[gas4you]

at an annual service all safety devices should be checked including the prv for operation. That is what I meant, not did he drain the system using it, as you rightly point out is not supposed to happen Tony.

 

[1974lynne]

I have told my partner to call him back out as i have not got a clue what i am looking for.plus it is his mate that looked at it in the first place
Thanks lads will let you know what went on
1974 lynne

 

[Agile]

at an annual service all safety devices should be checked including the prv for operation.

Thats easier said than done!

Even lifting the PRV for a second to ensure its not stuck can result in it leaking! Many prefer to leave it alone if its correctly connected to the outside and looks in good condition.

Overheat stats are even more probablematic. Apart from visually checking that they are in position and connected few would overheat the boiler to confirm that they do open as that can precipitate other faults.

Unless you like call-backs many of these things are just visually checked.

I did once see a 3 Bar PRV stay tightly closed as the pressure rose above 6 Bar until the EV leaked and relieved the pressure!

Tony

 

[gas4you]

Luckily i've only had 2 call backs so far, strangley both Alphas

 

[corgiman]

Could be that service engineer opened pressure release valve to test it and it hasn't re-seated correctly.

He should have known better!

Even Vokera tell you in the front of their MI that the PRV should never be used to drain the boiler.

Call him back as its his fault ( if its dripping from the vent outside that is).

Tony

I know we have had this row before but I agree with GAS Agile

if A PRV is present you MUST test it, if it leaks it MUST be replaced

what would happen if the bleedin thing didnt open????

I check All sealed systems PRV just like an unvented cylinder

 

[Agile]

Devils advocate here!

How can you be sure that by just turning a PRV and getting water out of the vent that it will really lift at 3 bar???

The only secure way to test it is to over pressurise it !!!!!!!

And that risks bursting radiators!!!

I went to a problem boiler where someone previously had just changed the head of the PRV and as it was a different make it was no longer lifting at the original pressure!!!

Tony

 

[corgiman]

true but it still should be checked

 

[kevplumb]

Even Vokera tell you in the front of their MI that the PRV should never be used to drain the boiler.

read the linea MI it tells you to use the prv as a drain so does the potty puma

 

[corgiman]

see it must be true agile MY dad says so

and he is bigger than your dad so think on