Noise on the pipe when heating goes on and off. Help

[BlueLoo]

it is on an S Plan so an ABV is required

Not quite.

If your boiler requires one, you must fit an automatic one.

An important distinction. Automatic because the authorities don't want the cut-paste heating installers continuing with manual bypass valves which, over a bazillion units, adds up to the UK's energy footprint.

Which is daft but understandable given the numpties who read the thing (if at all).

However, where a bypass valve isn't needed because boiler (as in this case looking at the info), adding a automatic bypass goes in the opposite direction of the intended regs. Literally.

So. My reading is that this boiler should not have one as it does the overrun itself.

The plumber put one in, following his cut-paste template but set it to max, effectively locking it out.

It gets interesting because the boiler has a ErP variable speed pump which does NOT want a external bypass added at all.

So. I think that all this ****e is co-interacting to give the OP his problems.

Quite happy to be told I'm wrong mind.

 

[BlueLoo]

My hot water is on 24/7 and every night after I had had my shower and got into bed, about 15 minutes later there was a single bang/thump on the system like someone had bashed a pipe with a hammer. Took me weeks to find out what it was and it turned out to be the ABV opening - I confirmed it by holding on to the thing and waited for the bang - I could clearly feel it too. That was on my old boiler when I had no inhibitor in the system. I don't know if inhibitor has lubricating properties but when I added it to the system, the noise disappeared so I assume it was just slightly sticky?

They do fail. I've changed mine before now for something similar.

 

[ianmcd]

However, where a bypass valve isn't needed because boiler (as in this case looking at the info)

where did you see info relating to an S plan in the MIs for this boiler ?

 

[BlueLoo]

where did you see info relating to an S plan in the MIs for this boiler ?

Why is the s plan relevant at all?

 

[ianmcd]

Why is the s plan relevant at all?

Because the OP has an S plan

 

[DP]

OP, check the pressure reducing valve is not making that noise. Reason why I ask is, about 3 months ago a client had a similar issue, replaced that valve and all is well ( so far)

 

[BlueLoo]

Because the OP has an S plan

I read that but so what?
Either the boiler needs a external bypass or not, regardless of the heating configuration.
It's only when it does need that external bypass that you can look to see if the configuration helps or not.

Have a read up on variable speed pumps and the chaos they cause in systems fitted (incorrectly) with ABVs.

 

[Jonny Vee]

Got confused to the point that I`m not sure what to do

 

[BlueLoo]

Where is this noise coming from exactly?
Which bit of the system?

 

[ianmcd]

Either the boiler needs a external bypass or not, regardless of the heating configuration.

you are completely wrong and you are confusing the OP , dont argue about things you have Googled, there is already a google king on here

 

[Jonny Vee]

you are completely wrong and you are confusing the OP , dont argue about things you have Googled, there is already a google king on here

In Italy they may have different system? Just guessing why this is getting confused

 

[ianmcd]

In Italy they may have different system? Just guessing why this is getting confused

May very well be but he is in republic of Ireland , not Italy

 

[Jonny Vee]

May very well be but he is in republic of Ireland , not Italy

Bloody flag confused me

 

[Jonny Vee]

Played around it tonight getting heating on off. I noticed noise comes from the zone valve actuator which also moves and shakes when opening and closing and seems like it forces the other actuator to close even more too.

 

[BlueLoo]

you are completely wrong and you are confusing the OP , dont argue about things you have Googled, there is already a google king on here

Google?

Don't be arrogant with your knowledge.
You've no idea what i do or don't know or how i learn.

Why is what i have said wrong?

This isn't a challenge, its a genuine question. Explain, else your comment is worthless.

I've no probs being wrong.