Worc Bosch took 20 minutes for boiler "service"

[gassafe]

In real life no-one isolates the boiler, drains it down & tests / pump up expansion! Plus then opens the prv to check it operates!

If the pressure is stable, with no high rise & the customer confirms no frequent top up then that to me confirms an okay vessel!

If I isolate the boiler, the valves will probably start leaking. The schrader valve will then start passing, the prv will continually drip after opening & the customer certainly won't be thanking me for now saying I need to replace parts!

I think with knowledge & experiences engineers can tell alot about the boiler without following books by the letter!

Its like the old boilers that tell us to completely strip the boiler, removing fan, burner nozzle, etc etc, we don't do those parts either if its going to break seals that we then have to source & replace!!

 

[gassafe]

Your better off checking the expansion vessel next time the system is drained for any reason! Saves touching old valves, or touching the prv!

Anyone who opens a prv on a greenstar situated at the back of the hydronic block is asking for trouble! I hope you have not got any jobs booked in after that service if you do lol!

 

[dancinplumba]

Your better off checking the expansion vessel next time the system is drained for any reason! Saves touching old valves, or touching the prv!

Anyone who opens a prv on a greenstar situated at the back of the hydronic block is asking for trouble! I hope you have not got any jobs booked in after that service if you do lol!

Had to change one yesterday, ball ache, crap boiler, crap design. Good earner tho haha 🙂

 

[gassafe]

Had to change one yesterday, ball ache, crap boiler, crap design. Good earner tho haha 🙂

That will teach you to test the prv... Lol

 

[gassafe]

Had to change one yesterday, ball ache, crap boiler, crap design. Good earner tho haha 🙂

I've not had the pleasure yet! Did you take out the block or lift the boiler off the wall?

 

[DirksPlumbing]

In real life no-one isolates the boiler, drains it down & tests / pump up expansion! Plus then opens the prv to check it operates!

If the pressure is stable, with no high rise & the customer confirms no frequent top up then that to me confirms an okay vessel!

If I isolate the boiler, the valves will probably start leaking. The schrader valve will then start passing, the prv will continually drip after opening & the customer certainly won't be thanking me for now saying I need to replace parts!

I think with knowledge & experiences engineers can tell alot about the boiler without following books by the letter!

Its like the old boilers that tell us to completely strip the boiler, removing fan, burner nozzle, etc etc, we don't do those parts either if its going to break seals that we then have to source & replace!!

I assume. I better should not comment on this.
And no, spiking pressure is a sign only of either incomplete service or a faulty expansion vessel. Picture your expansion vessel like a car tyre. Are you driving till there is no pressure left? This usually leaves the customer with a hefty fine for replacing the vessel as then it had started rusting (gap corrosion) and piercing the membrane.

If you try to reinflate one of those poor ignored vessels they typically break down.

Same with the PRV. These are actually built to reseal. But left alone they might gather all sorts. Best combined with the system needing recharged for the last 11 month as the engineer could not be bothered to check. And getting much more content replaced but just half an expansion vessel. Now opening indeed can cause something stuck in there. Or the seal just simply sticks over the years. And gets ruptured. But let's face it, it is only a safety device, nothing important.

And how do you need to isolate the boiler for doing so?

The TT indeed is no requirement. But you honestly break into the test nipples and walk away without the feeling to better have checked. Not to talk about it being considered as good practice. Which in return has a legal meaning to you.
If nothing happens, fine. If something happens, you have to answer the question why you did not do it. Last man on the system and no check, tztztz.

 

[hammers4spanner]

leak detector spray over test point as per usual

 

[gassafe]

Quote
And how do you need to isolate the boiler for doing so?

How do you test & top up expansion without isolating the boiler?

 

[gassafe]

Yes the prv is built to reseal... But in the real world. It does not!

the same as a drain off does not open & when it does it leaks everywhere!

A gate valve is designed to shut water off but fails too, same as pump valves!

 

[dancinplumba]

That will teach you to test the prv... Lol

I didn't, it had tripped, exp gone

 

[dancinplumba]

I've not had the pleasure yet! Did you take out the block or lift the boiler off the wall?

Took block out 🙂

 

[lame plumber]

deleted the post as fed up with pointing out same facts

 

[Billy Bob Bob]

these digs at landy owners vern 3 of the mods own them and croppies a supporter,and mischievous mods can make your posts read very strange you have been warned :tongue3:

 

[DirksPlumbing]

Quote
And how do you need to isolate the boiler for doing so?

How do you test & top up expansion without isolating the boiler?

0.5bar (For WBs)

 

[DirksPlumbing]

0.5bar (For WBs)

Sorry if I am asking, I would not see why I should isolate? Any specific reason?

 

[gassafe]

Most Worcesters I seen are 0.75

but that has to be tested with the heating side depressurised or your getting a false reading!? And to top up requires an open end on the heating circuit so to build up pressure in the vessel.

 

[gassafe]

Most Worcesters I seen are 0.75

but that has to be tested with the heating side depressurised or your getting a false reading!? And to top up requires an open end on the heating circuit so to build up pressure in the vessel.

thats why I said its best to test & charge expansion when the system is next drained

 

[DirksPlumbing]

thats why I said its best to test & charge expansion when the system is next drained

Rule of thumb as I have been taught is half the design pressure of the expansion vessel. Most WBs I came across had 1bar design pressure on the vessel hence the 0.5bar system pressure.

Your false reading can only happen if the system pressure is equal or higher than the expansion vessel pressure.

All you do is watch the system pressure whilst topping up. If moving, discharge more.

 

[gassafe]

deleted the post as fed up with pointing out same facts

All this because the Worcester Bosch man can do a service in 20 minutes!

Thank Worcester for that...

 

[dancinplumba]

All this because the Worcester Bosch man can do a service in 20 minutes!

Thank Worcester for that...

As we all ask,what is a 'service' ????