Expansion Vessel again!!

[NickRCarter]

Hi, Just a quick and simple question and a simple answer, I hope.

I have two sealed systems, one has a vessel with an inlet to recharge with a footpump or similar, the other does not appear to have such a connection. Am I missing something?? In both senses?

It is the latter that I have problems with, which I believe is defective due to the normal symptoms.

Nick

 

[xild]

If its a sealed system it will have an expansion vessel.

 

[ChrisR]

All sealed systems have expansion vessels, and a filling arrangement for WATER. Is that the one you're looking for.
Expansion vessels do all have an air-filling valve, but that rarely needs attention.

 

[NickRCarter]

Hi,

Yes both systems are sealed and both have expansion vessels, except only ONE has an air filling valve??

Nick

 

[AlanE]

Is this one part of the boiler? If so make & model otherwise is there a makers name model on the vessel?

Any chance of a photo?

 

[NickRCarter]

Photo coming up in 5 mins. I'll check for details on vessel.

 

[NickRCarter]

The name on the vessel is Flexcon.

I would put an image on but I don't know how to do it?

 

[xild]

It would appear they are preset and cannot be recharged. They have a tamper proof cover.
See http://stentor.flamco.nl/page/pdf/1d.pdf

 

[NickRCarter]

Yes that is the one. I guess it is just a simple case of replacement in that case.

The symptoms are, if I charge to say 1bar cold, when the system runs it goes to around 3bar then it discharges some water through the valve. When system cools, pressure drops to sub 1bar.

I can presume the diaphragm has gone!!

Nick

 

[xild]

typical symptoms of a duff expansion vessel. If it had a shraeder valve (like a car tyre) it would be easy to tell.

 

[simond]

It has got a schraeder valve.

Clearly xild is not a plumber or heating engineer. The 'tamperproof cap' he read about in the specs on the internet is just a circular plastic cover which unscrews.

I think it is very useful for a forum to take advice from all; its just that a novice may assume what they read to be correct.

I see that xild's last posting got him into some trouble and he retrospectively edited out all his text with 'abc'.

Perhaps he could do the same here?

 

[NickRCarter]

Hi Simond,

If as you say it has such a valve I would be very interested to know exactly where it is on my particular vessel?!

Nick

 

[chrishutt]

You can see where it is on the brochure linked to above. It's under a plastic cover at the opposite end to the water connection.

 

[NickRCarter]

So its at the base of the vessel. Thats a real pain as the vessel is installed sitting on the floor so access to the base is not possible.

I take it from the symptoms I have that replacement is a real probability. If I have to drain, disconnect in order to gain access to the base and coupled with the fact that the relief valve has activated, so I understand that should be replaced, I am probably best advised just to replace.

In any case for this to happen so quickly, I doubt refilling of the vessel will assist, if in fact the bladder is still complete inside.

Any thoughts?

Many thanks,

Nick

 

[chrishutt]

Well worth recharging the air side. More often than not it's all that's required.