Ideal Mini C28 expansion vessel

[sadders]

It's the hottest day of the year and I am thinking about the central heating. Sad.

What size external expansion vessel do I need for an Ideal Mini C28 boiler?

With thanks.

 

[transam]

Depends on the volume of your heating system i.e water content

 

[sadders]

Depends on the volume of your heating system i.e water content

How do I find that out?

 

[45yearsagasman]

Whats wrong with the existing one? The size is usually on a data badge or failing that is in the manufacturers instructions.
How many rads you got?

 

[transam]

Depends on the volume of your heating system i.e water content

How do I find that out?

Calculate it .

off the top of my head a mini c has a 6 litre ( I think ?) exp vessel half a bar charge pressure suitable for 90 ish litre system volume.

GW might pick up on this thread , fella should have been a mathematician instead of a pipe strangler

 

[sadders]

No pressure when cold and climbs high is when hot plus water comes out of the expansion tank air inlet valve when the pin is pressed in. No way that I can replace the original vessel, but no problem with an external one as long as I have the right size.

13 rads of varying sizes.

The original vessel looks to be about 6L (est) which seems small compared to the sizes of external ones on sale. I presume it is better to go large.

 

[Boilerman2]

12 litrte vessel will be more than enough if you have room to hide it on the system!

 

[sadders]

12 litrte vessel will be more than enough if you have room to hide it on the system!

Fortunately the boiler is in a full height cupboard so plenty of room.

Thanks for the replies all.

 

[Agile]

Has it been repressurised ( to 0.9 Bar ) with system empty?