Hi everyone I am Bpec part g qualified but have not had much hands on experience and have a job where the customers pressure relief valve is discharging at more than a trickle and just would like to verify my ideas on the job with more experienced unvented engineers before replacing anything. I did not install system or carry out any work on this customers system before and the first time I looked at it was today.
job background:
prv is discharging quite a bit, water is cold. I checked the expansion vessel and this has no charge so re-charged to specified bar. But prv still discharging, I then checked vessel pressure again to see if it had lost its charge but it hadn't, so leads me to think the vessel is ok? Only other thing is I got a small/fine spray of water on first couple I pumps when pumping up vessel, it stopped for the rest of filling, is this right or does this indicate that there may be pin hole in diaphragm? I need to check pressure after pressure reducing valve but only have gauge that attaches to taps with rubber and jubilee clips, I was thinking of either putting gauge on d2 with all taps closed and allowing d2 to fill as there is not tundish on d2 and test pressure this way or capping d2 just for test to stop loss Of pressure through discharge and put gauge on hot tap, would either of these ways give me a accurate pressure reading? Obviously if pressure above 3bar then pressure reducing valve will be replaced if not then pressure relief will be replaced.
I have tried to give as much detail as I can but feel free to ask more questions, like I said I have the qualification but as we all know passing a test and doing it in real world is a lot different and I don't know any other unvented engineers to call upon their knowledge.
Sorry for the essay and any spelling mistakes
All help appreciated, thanks everyone
job background:
prv is discharging quite a bit, water is cold. I checked the expansion vessel and this has no charge so re-charged to specified bar. But prv still discharging, I then checked vessel pressure again to see if it had lost its charge but it hadn't, so leads me to think the vessel is ok? Only other thing is I got a small/fine spray of water on first couple I pumps when pumping up vessel, it stopped for the rest of filling, is this right or does this indicate that there may be pin hole in diaphragm? I need to check pressure after pressure reducing valve but only have gauge that attaches to taps with rubber and jubilee clips, I was thinking of either putting gauge on d2 with all taps closed and allowing d2 to fill as there is not tundish on d2 and test pressure this way or capping d2 just for test to stop loss Of pressure through discharge and put gauge on hot tap, would either of these ways give me a accurate pressure reading? Obviously if pressure above 3bar then pressure reducing valve will be replaced if not then pressure relief will be replaced.
I have tried to give as much detail as I can but feel free to ask more questions, like I said I have the qualification but as we all know passing a test and doing it in real world is a lot different and I don't know any other unvented engineers to call upon their knowledge.
Sorry for the essay and any spelling mistakes
All help appreciated, thanks everyone
