Thank you! Thank you for your kind words and yes, I enjoy doing this and getting the information out to guys that are getting started. Thank you for watching!
You might even have to wait an hour, pull vacuum again, wait an hour and do it a third time if you know the system doesn't leak (the lubricants can hold a lot of refrigerant). However, if you have a leak on the system, you might be pulling air/contamination into the system. So if you KNOW you have a leak, don't pull more than one time and only down to slightly above outside air pressure. Or you'll suck air into the leak. Blow nitrogen through the system (best to disconnect the recovery machine first, just in case) and then fix the leak. In the case you are doing a repair, you'll probably want to put the refrigerant back into the system after repairs are done. Sucking air into the recovery machine, in this case, would be bad. In that case, you'd want to recycle the tank and put virgin refrigerant into the system once repairs are done. Ideally, with a leaky system, you don't let the pressure be higher outside from the system to prevent contamination. A pressurized system above outside air pressure will leak outwards only. Lower than outside air pressure will let air/moisture leak into the system. As a side note, you can put refrigerant back into the system it came out of, but regulations allow no other option but recycling. I had to do this with a unit that a reseller sold me that was no longer compatible between the condenser and air handler due to a software upgrade. They hadn't updated their catalog to reflect this. And sold the package that would not work together. This was a microcontroller software controlled system. In fact, I think they are still selling the combo. BTW, it's still working great today with the new (and correct) air handler. Best to check with the manufacturer before you buy a combo package from a reseller. 😞
Thank you! You bring up a lot of good points. Specially about the leaks and pulling air noncondensibles back into the system. As you will know, there is so much that there is to say what video says for training purposes, this is only talking about recovering the refrigerant from the system. Maybe I will make another video where I go into all of the things you might want to look for before you actually start recovering. It is always good to hear from guys out there that are experienced. Thank you for watching and thank you for your comments!
