Worcester junior 28i (non condense)

[spanner]

Hi guys weekends here again..
Got a junior 28i about 12 year old boiler
The pressure is constantly topping up!
With or without the filling loop key .
The client has gone away until next week and not going to do any further work until they return and have left no number to contact whilst away and left me the door keys.. haaa.. this sounds fishy.
Getting back to the issue
The prv is discharging and when isolated obviously no hot water ( few drips and drabs from the hot outlet) but still pressure will gradually build up on the gauge?
Few things is ISO letting by??
Either the internal fillig loop letting by??
OR a hole in the PHE( plate heat exchanger) calorifier constantly building up and discharges through PRV??
Also a banging kettling noise when working on central heating ( this I think would be the constant induction of fresh mains water scaled up in the exchanger causing a blockage, the constant bang bang".
I'm thinking of just applying a " DO NOT USE lable filling out A C12
Would i be correct to issue this and assist the boiler is unsafe to use?
Switch off?
If anyone has this advise would be grateful thanks.
1st thing - Tightness test was succesful.

 

[Harvest Fields]

Heat exchanger?

 

[Old Account]

Hi spanner, to me it sounds very fishy.
I would not have kept they keys because very often they will blame you once there are back that the scenarios you describe didn't happen before. Then you are trapped, just because they want you to fix it for free.
It sounds to me the internal filling loop letting by.

However, I'd be careful with taking someone's keys it could end badly.

I cannot give you a answer about labelling as I am not gas safe yet.

Perhaps @ShaunCorbs @king of pipes @rpm they could help you out.

 

[Harvest Fields]

Hi spanner, to me it sounds very fishy.
I would not have kept they keys because very often they will blame you once there are back that the scenarios you describe didn't happen before. Then you are trapped, just because they want you to fix it for free.
It sounds to me the internal filling loop letting by.

However, I'd be careful with taking someone's keys it could end badly.

I cannot give you a answer about labelling as I am not gas safe yet.

Perhaps @ShaunCorbs @king of pipes @rpm they could help you out.

Is the internal loop the white key type? If so is th key removed as if it is it cannot pass

 

[ShaunCorbs]

Turn the water mains off and open a hot tap does the boiler system pressure drop ?

 

[Last Plumber]

Is this on right Forum?

Just asking

 

[Harvest Fields]

Good spot. Don’t think it is. @ShaunCorbs
Sorry Shaun didn’t see your post above

 

[ShaunCorbs]

Your both on the ball today just about to move it and two notifications pop up 😀

 

[Harvest Fields]

Your both on the ball today just about to move it and two notifications pop up 😀

Might be the fact I’m on my 3rd coffee already.😛😛

 

[Last Plumber]

Might be the fact I’m on my 3rd coffee already.😛😛

I've only had one but it was thick!!!!

 

[ShaunCorbs]

Might be the fact I’m on my 3rd coffee already.😛😛

3 wtf what time did you get up lol

 

[ShaunCorbs]

I've only had one but it was thick!!!!

😀 just got a mental image of you just eating coffee grounds

 

[Harvest Fields]

3 wtf what time did you get up lol

0630 this morning. I look like this 😕😕now though

 

[Last Plumber]

😀 just got a mental image of you just eating coffee grounds

Yes, munching away on thick coffee like chewing tobacco

 

[spanner]

Is the internal loop the white key type? If so is th key removed as if it is it cannot pass

Yep the white built in internal key
Weren't to hand
Has to get one from spares
I'm on hold until they get back.
Been there before with hijacked appliance owners.

 

[Harvest Fields]

If the key is not in place it will not be the loop as I said before mate.

 

[spanner]

Cheers mate
No drips from loop
Had to attain another key as there weren't one there.
Have put the danger do use label on it.
Filled in a CP12
Wait till they get back.
Surely the cost of the repair is going to be outstanding.

 

[ShaunCorbs]

Cheers mate
No drips from loop
Had to attain another key as there weren't one there.
Have put the danger do use label on it.
Filled in a CP12
Wait till they get back.
Surely the cost of the repair is going to be outstanding.

why a danger label?

 

[spanner]

Loud banging within the heat exchanger so far...
And that stands as.
Still need them present to ask about the hot water outlet and colour

 

[spanner]

Was asking about this issue earlier..!!

 

[ShaunCorbs]

Loud banging within the heat exchanger so far...
And that stands as.
Still need them present to ask about the hot water outlet and colour

and how does that mean its unsafe ?

 

[Harvest Fields]

and how does that mean its unsafe ?

It doesn’t 😛😛. Are the flow and returns open under the boiler and is the pump
Spinning? Didn’t you say the pressure was constantly rising?

 

[spanner]

Waters off at the moment.
When it's back on and they're present I can carry out the rest of the investigation.
Personally the the noise coming from it is not right and I'd class it as a do not use.
Until the fault is rectified for their safety and others..

 

[spanner]

Yep flow and returns are open
Cold water isolated at the moment

 

[ShaunCorbs]

is the heat exchanger ribbed?

 

[spanner]

Ain't removed chamber cover yet

 

[spanner]

Talk about removing.
I'm not even going there.
As far as I've seen it's enough
These people should be back tomorrow.
And as far as things go
I'm not going to assist it in any way.
They can get another engineer to do what's required.
Whether a replacement or repair.

 

[ShaunCorbs]

Ain't removed chamber cover yet

how can you complete a cp12 then?

 

[spanner]

Not complete
Its tightness tested only and as far as the issue with the discharging of the prv and banging..
Or have I filled out the wrong form ..??

 

[ShaunCorbs]

are you training or fully gas safe?

 

[spanner]

Its the only form u have other than the hot water G3 sheet

 

[spanner]

Fully gas safe.

 

[ShaunCorbs]

no theres a few

Gas Safety Shop: Certificate-Pads

did you fill out a do not use form / cert and isolate it

 

[jtsplumbing]

For your information the 28i doesn't have a Plate heat exchanger, just had a similar problem with one of these found a blockage in the flexi pipe between the pump and expansion tank, & its a pig to get at

 

[spanner]

Cheers mate.
Will scroll through
So which form would you USE
For this task??