Powermax 155x

[Balenza]

Onetap wrote

Well, it's a hot water storage cylinder and not a plate heat exchanger. The word isn't much used in respect of domestic systems, so you wouldn't have known what it means.

Calorfier.

The term calorfier generally refers to a type of INDIRECT CYLINDER heated by steam or high temperature hot water used mostly for non-domestic purposes,but see also STEAM HEATED CALORFIER.

Would you believe it, this was in my Treolar Encyclopaedia.

It happens when the hot tap is run, which would cool the store down.

The store cooling down after a hot tap being opened will not drop the pressure to zero.

It might well be that the expansion vessel has failed and there's no air in it.

It might well be but the OP has already stated...

Charge in the expansion was 0.7bar

Then Onetap wrote

I still think it's probably a failed heat exchanger.

Which one. The one the OP has replaced or another one perhaps.

You still have not explained why the primary side is not being topped up again by mains water pressure.
Or perhaps the OP will explain what IS happening before you get worked up again and resort to your crystall ball .

 

[Onetap]

Calorfier.

The term calorfier generally refers to a type of INDIRECT CYLINDER heated by steam or high temperature hot water used mostly for non-domestic purposes,but see also STEAM HEATED CALORFIER.

Would you believe it, this was in my Treolar Encyclopaedia.

As I had said, it's a cylinder, not a PHX.
You had to look that up.

The store cooling down after a hot tap being opened will not drop the pressure to zero.

It would if there was no air in the expansion vessel.
100 litres of water in the 155x, about 4% contraction from 80degC, 4 litres change of volume and nowhere for it to go. Pressure would drop to 0 and the AAV (on top of the boiler) would let air in.

You're really not very good at this. Many Corgi blokes are a bit clueless about non-gas things I've found.

It might well be but the OP has already stated...

Charge in the expansion was 0.7bar

That's a pressure; if he hadn't drained the water side when he measured it, it wouldn't tell him if there was any air charge.

Which one. The one the OP has replaced or another one perhaps.

You still have not explained why the primary side is not being topped up again by mains water pressure. .

Quite possibly both.
Where did he say it was being topped up again? Or wasn't?

Or perhaps the OP will explain what IS happening before you get worked up again and resort to your crystall ball .

More stupid little comments and emoticoms.
Any suggestions from you yet?

 

[Balenza]

Onetap wrote

As I had said, it's a cylinder, not a PHX.

No. The OP said it was a PHX.

You had to look that up.

No, I just read what the OP stated though treolar is handy.

It would if there was no air in the expansion vessel

Thanks for letting me know that. Id never have guessed.

100 litres of water in the 155x, about 4% contraction from 80degC, 4 litres change of volume and nowhere for it to go. Pressure would drop to 0 and the AAV (on top of the boiler) would let air in.

No Sh@it.

You're really not very good at this.

My crystall ball is not working tonight.

Many Corgi blokes are a bit clueless about non-gas things I've found.

Thats it, bash the corgi,s.

Quite possibly both.

Oh I see. So their is TWO.
Perhaps the second one has failed then.

Where did he say it was being topped up again? Or wasn't?

Where did he say it wasn,t or was ????.

More stupid little comments and emoticoms.
Any suggestions from you yet?

Nah. Ill sit back and enjoy the entertainment.
Keep it up.

 

[Onetap]

No. The OP said it was a PHX.

In his original post, he said a calorifier, a cylinder.
He then said the PHX when I queried it.

It would if there was no air in the expansion vessel

Thanks for letting me know that. Id never have guessed.

No, you would never have guessed. That is why you had said;

The store cooling down after a hot tap being opened will not drop the pressure to zero.

You were wrong. You haven't got a clue.

 

[Balenza]

Onetap wrote

In his original post, he said a calorifier, a cylinder.
He then said the PHX when I queried it.

So whats your point ?.
Its been changed and its not leaking thus your original hypothesis is incorrect.
And what about this second heat exchanger you are on about ??.

Quite possibly both

Are you going to englighten the forum and the clueless corgis ??.

No, you would never have guessed

I think I would.
But you thinking that I wouldn't will probably make you feel better.

That is why you had said;

The store cooling down after a hot tap being opened will not drop the pressure to zero

No I said that because the store will not drop to zero when a hot tap is opened. (assuming of course that the expansion vessel is functioning correctly.)
Which is what I was assuming when I wrote that.

You were wrong.

Really. It must make you feel good to think I was wrong.

You haven't got a clue

Looks like you haven't either.

 

[corgiman]

I think I can safely say that neither Bal, myself or onetap have a clue