ferroli modena 102 low pressure after bleeding radiator

[Mistwalker]

Hi guys,

I've just bled a radiator and now I don't get Central Heating or Hot Water due to low pressure. After reading various threads I can see I need to re pressurzse the system using two valves and the loop thingummiewotsit. The problem is, looking at my boiler, there are FOUR valves and I don't know which ones I have to deal with. Below is a photo of my boiler setup. If someone could walk me through it I would be really grateful.
Thanks in advance....

 

[TCCHeating]

The white tap connected to the braided silver pipe is the filling link. Open it up slowly (turn anticlockwise) until the pressure on the boiler guage gets to 1 bar. Then close it. Make sure you don 't put too much in

 

[Mistwalker]

Thank you very much for that. You're a gentleman and a scholar. I now have Hot water and Central heating again. I had to raise the pressure to about 1.4 bar before the low pressure light went out but all is working great now.

Many thanks again

 

[Mistwalker]

Well, I thought all was well but there appears to be another problem. The water pressure gets to over 3 bar within minutes of the central heating coming on. Starting with a cold pressure of 1 bar I can watch the pressure gauge rising and it keeps on going and if left, even gets passed 4 bar until it's literally off the scale. I have to switch the heating off myself before the pressure drops.

I've bled the radiators numerous times today and even disconnected the filling link to make sure no more water is getting into the system but that damn pressure keeps rising.

Any ideas, guys?

Thanks in advance.

 

[Terry lambert]

Most likely your expansion vessel needs recharging

 

[denso13]

//www.diynot.com/wiki/Plumbing:faq7

 

[Mistwalker]

Thanks for your help, guys. I'll give that a go tomorrow when I'm more awake. For tonight I've switched off the CH but at least we still have hot water.