Certifying we passed the vacuum decay 10 minute micron test using the Fieldpiece SVG3
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- Опубліковано 29 вер 2024
- We have created a easy way to certify to any repair or installation as non-condensible and leak free, take a picture of the micron gage and attach it on our customers account.
I like to use the Fieldpiece Job Link vacuum gauge and the app to record vacuum decay over time, which provides a very nice PDF along with all of the other commissioning data.
Shakaay
Hey I thought 500 microns was the industry standard. Also while you took your picture the gauge was continuously rising in microns. What micron level do you go by and where does it say over 500 microns is ok?
If you were to look at different manufacturers install instructions they all vary a bit. Goodman is almost verbatim to what I share with folks. Pull down to500, isolate from vacuum pump and perform10 minute decay test with goal to stay under 1000 microns in 10 minutes.
Ideally you would like to pull below evacuation target for 10 minutes to completely dehydrate the system. Jim at MQ did a test of the effects of decay going over 1000 even if it's past 10 minutes amd the effects it had on a compressor. Ideally you want your decay to level off before the 10 minute mark. IE. You pull below 200, ( I on average hit this within 4 minutes on a new system. Once I'm below 200 I'd Ideally like the vacuum to run for 10 minutes before isolating and performing a decay. So after 10 minutes ultimate vacuum could be 83 microns for example before starting decay test. In his video he did 1000 microns as his decay target. If it's a brand new system residential I would always choose 500 microns and nothing more for POE oil. I'd let it isolate for 10 minutes. If I come back and it stayed at 83 microns or was way below 500 you're generally safe. If you have Bluetooth you can see the graph and decay rate. Generally a properly evacuated system should have the decay level off before 500 microns entirely.
@@JPTinioMedia what if it’s a repair on an old system? Hard to get to 500 sometimes.
@Bullish Bear Used system ASHRAE states under 1000 microns of a finished decay is okay. That being said the biggest problem with the hvac Industry specific to air conditioning is that to do things properly it takes a lot of time which no one has an excess of. Typically a failed compressor that has had moisture in the system you are to replace it with a specific drier filter and oil. Run it for 4 weeks, reclaim everything, replace oil and drier filter. Then at at that point when you vacuum it'll drop to 500 easy, but its rare for business to have time wasted like that or a customer wanting to pay for those extra efforts