Hi - i don't know if anybody can help me... i am having a nightmare trying to repressurise my boiler. A Vokera Syntesi 25e. My filling valve is permanently connected so i did as my boiler instructions said to increase the boiler pressure and turned the filling loop to the vertically down position. I expected to hear water entering the boiler and the pressure to rise but nothing happened. My central heatign system is working fine - all radiators and warm water nice and hot - so I dont know what the problem can be. My pressure is below 1 bar at the moment so would like to increase it. The filling valve loop reaches from the filling valve (the one with the three normal/off/filling loop positions) along the loop to another tap on the left which has a black knob marked with open/shut in two directions. What is this and am i supposed to do anything with that? Any help would be much appreciated
Could be that the filler loop is connected to the stored water and not the mains. If that is the case then a pressure of more than half a bar is unlikely. Things should be O K as long as the pressure remains about this setting. Is the filler loop the type that has two taps on it?
Boilers run at a low pressure, usually less than 20 lbs psi. Your pressure will vary depending on the water temp during firing or non firing times. Ex: my electric boiler runs as high as 20 psi while it's heating, but drops to less than 5 psi when idle and cool. You might just have to check the pressure when the system is hot and has been circulating for awhile. Another thing to check would be to open a bleeder on a radiator and see if the pressure drops to nothing [water stops coming out]. This would be evidence of a defective fill valve. But if the water continues to come out if the bleeder, you are probably fine. Check when boiler isn't running full bore, to avoid getting burned.
sounds like a valving problem. you could have that 3-way valve in the wrong position. trace the pipe and make sure its piped to the fill line. besides that try the valve in all three positions and see if pressure rises. if not then maybe the valve is busted or there is another valve up or down stream that is closed. remeber not to fill too high because that water ur adding is going to heat up and make the pressure go even higher after alittle run time
