Well that should say:
'Potterton Lynx II boiler discharging CH water through waste pipe'
I had a problem when I came back from a business trip, and found the 'low pressure' light on and boiler inoperative. The CH pressure guage did show low pressure (a v slow leak somewhere over the years, never found it, but it seems to have been OK until now. Topping it up from the mains U-pipe and resetting for 5 seconds didnt work). I used the instruction guide's flowchart to identify the Pressure switch was faulty. Sure enough, disconnecting one of the leads seemed to do the trick, and I ordered a new pressure switch to install.
Which I did at the weekend. I drained the system as per instructions by releasing the pressure via the Pressure Relief Valve, and draining via the CH drain-off screw. Replaced the pressure switch with no problems, but ran into 2 problems:
1) The CH flow and return isolation valves started weeping. Figured that they hadnt been used in so long, and thats what happens. Piece of cr*p.
2) Main problem, however, is that, when I topped up the CH circuit, it promptly started ejecting it through the waste pipe in the wall. So in a few minutes, my pressure was down to zero. Its like the Pressure Relief Valve was constantly activated or something.
Is there a way around this? I can get hot water (so at least I don't stink at work) but would like to sort this out. Is there a tweak on the PRV that needs to be done? Odd thing is, I would have thought the Low pressure light would have come on, or is that only for the main hot water?
Certainly cant replace the PRV, its way round the back of the pipes, and a man has to know his limits. I figure that I need a specialist to check the boiler over anyway, and fix the weeping valves, but any advice would be welcomed.
I am not a pro by any stretch, but I did study engineering.
cheers
Slay
'Potterton Lynx II boiler discharging CH water through waste pipe'
I had a problem when I came back from a business trip, and found the 'low pressure' light on and boiler inoperative. The CH pressure guage did show low pressure (a v slow leak somewhere over the years, never found it, but it seems to have been OK until now. Topping it up from the mains U-pipe and resetting for 5 seconds didnt work). I used the instruction guide's flowchart to identify the Pressure switch was faulty. Sure enough, disconnecting one of the leads seemed to do the trick, and I ordered a new pressure switch to install.
Which I did at the weekend. I drained the system as per instructions by releasing the pressure via the Pressure Relief Valve, and draining via the CH drain-off screw. Replaced the pressure switch with no problems, but ran into 2 problems:
1) The CH flow and return isolation valves started weeping. Figured that they hadnt been used in so long, and thats what happens. Piece of cr*p.
2) Main problem, however, is that, when I topped up the CH circuit, it promptly started ejecting it through the waste pipe in the wall. So in a few minutes, my pressure was down to zero. Its like the Pressure Relief Valve was constantly activated or something.
Is there a way around this? I can get hot water (so at least I don't stink at work) but would like to sort this out. Is there a tweak on the PRV that needs to be done? Odd thing is, I would have thought the Low pressure light would have come on, or is that only for the main hot water?
Certainly cant replace the PRV, its way round the back of the pipes, and a man has to know his limits. I figure that I need a specialist to check the boiler over anyway, and fix the weeping valves, but any advice would be welcomed.
I am not a pro by any stretch, but I did study engineering.
cheers
Slay