sorry if this sounds thickish! but what do you mean regulate the pre-charge? do you mean, check what it is ??
You 2 have been great, you obviously know your stuff and are very bright guys, but just 2 things that are a little confusing now.... I read that the pre charge has to be slightly...
valve on the top is the Schrader valve? under a cap. this is where the vessel is charged from with a foot pump (a car tyre foot pump with pressure gauge)!! ... is that right? :)
Thanks. The only reason I thought the more charge the vessel had then the larger size it would need to be is because i read a chart a system with 75 litres of water content with a 0.5 bar charge required only 6.3 litres of vessel and one with 1.0 bar charge required 8.2 litres of vessel!!
Thanks for all your replies to my post!! Although I am fairly confused now after reading all the replies and contradictions!!
Can I ask a few last questions before ending this post please?
1)A slightly over sized Ex Vessel is OK? No side affects?
2) An undersized Ex Vessel will mean...
Thanks for helping.
So a bigger than necessary vessel is OK, not dangerous or likely to cause any nusiance from my heating system? I am thinking a smaller one, would not be able to take up the volume of heated water and the pressure valve would open up??
Is there a standard size/charge...
i read that for every 1 metre of static head from the vessel to the highest rad (so in my case 2 metres) 0.1 bar pressure is the charge. So 0.2 bar should be the charge pressure. but as you have told me kindly, a little over is ok. if i charge it ip to 0.5 bar or even 1 bar is that ok too?
Thanks for helping me with my 2 posts guys.
The vessel i have is in the airing cupbaord. it says on it 12litres. doesn't say an exact charge pressure.
would it be dangerous to not charge it correctly, say if i overcharge or undercharge the new 1?