Got a Worcester Greenstar 3si, not holding pressure. Keep topping up everyday, put air in vessel, and prv leaking when boiler is on, oh and water comes out of vessel, is it the vessel or prv at fault??? Thanks, feedback Welcome 👍
@@yensabi It's was the expansion in the end, no air in it, so let all pressure out of system, turn off boiler, pumped up expansion vessel to just below 1bar, top off with water, turn boiler on, ran heating, and all is ok, no more prv leaks. When I said water was coming out of vessel, it was just that one time it came out. Everything still ok. Thanks for the feedback.
@@stuartsinclair6269 check your prv is not letting by. You only have to isolate the return and flow pipes on the boiler. Drain the boiler itself and recharge the tank. Bubble the Schrader valve with dish soap to make sure it's not letting by and seated correctly. I hope you put some fresh inhibitor in the system. When you recharged it. You wouldn't drive your car without Antifreeze in the radiator, would you?
So, what was the expansion vessel pressure just after you had drained down/prior to recharging to 1 bar ? - there must have been something in it, would be useful to know to understand typical behaviour of a unit that hasn't failed...Thanks
Expansion vessel holding 1 bar of water plus 2 bar of water in the system brings it near on the release pressure of the prv. It's basically a neoprene membrane which expands and shrinks. When water boils it expands and creates steam. Hot water needs somewhere to go. In a stream engine excess water is blown out similar to a prv. If the hot steam had nowhere to go it would explode the heat engine. If there were no prv the boiler would blow.
A unit thaat has failed will pass water through the Schrader valve. Briefly press it, if water comes out replace the vessel. If air comes out, drain the boiler and recharge it. Simplz
That Thumping Music is both unnecessary and annoying yet the video explanation is very good, Who's idea was it to accompany this with such ridiculous banging music
