Re: leak testing question
How can you leak check a known leaking system properly without reclaiming the charge?
Re: leak testing question
..Well electronic leak detectors have been pretty damn accurate / sensitive for some time and can pick up tiny leaks (as you know). They'll pick up leaks with static pressure, you can also leak test the high side with the system running. Not sure of your point?
When carrying out f-gas checks, you don't decant the system and pressurise with ofn.
Re: leak testing question
F-Gas checks are different.
2078/9 is clear that about the correct leak test procedure. If the system has lost refrigerant you must carry out a PLT with OFN and this test must involve a timed pressure drop test. The time should be relevant to the internal volume of the system.
Re: leak testing question
Is that legislation though, or just best practice?
Re: leak testing question
Quote:
Originally Posted by
terminator
Is that legislation though, or just best practice?
that is a very grey area
Re: leak testing question
If I found a system s o g I would of always gone round with a leak detector first whether it was the old flame on 22 or an electronic , pressure testing tells you there is a leak you've still got to find it !
I once had a small 410a split that held less than 1kg it took six months to loose enough to cause a problem , the leak only showed when in cooling mode on the outdoor suction flare , when it was in heating mode there was no sign of a leak , when it was pressure tested it held its pressure.
Re: leak testing question
Quote:
Originally Posted by
redroge
If I found a system s o g I would of always gone round with a leak detector first whether it was the old flame on 22 or an electronic , pressure testing tells you there is a leak you've still got to find it !
I once had a small 410a split that held less than 1kg it took six months to loose enough to cause a problem , the leak only showed when in cooling mode on the outdoor suction flare , when it was in heating mode there was no sign of a leak , when it was pressure tested it held its pressure.
Yes,
I've had hot / cold leaks - they can be a right pain to find.
Re: leak testing question
Sometimes when you have a problem leak you wish you could throw it in a swimming pool !
Re: leak testing question
.
Dot gov site states.............
https://www.gov.uk/guidance/f-gas-in...heck-for-leaks
If you find a leak
If a leak is found during a check, you must repair it and repeat the test within a month to check the repair worked.
It does not go into too much detail as to what constitutes a repair?
Rob
.
Re: leak testing question
Quote:
Originally Posted by
Rob White
.
Dot gov site states.............
https://www.gov.uk/guidance/f-gas-in...heck-for-leaks
If you find a leak
If a leak is found during a check, you must repair it and repeat the test within a month to check the repair worked.
It does not go into too much detail as to what constitutes a repair?
Rob
.
Which most companies get around by leak testing again within an hour - they don't come back a day / week / month later.