raven97990 said:You don't pull -40 vaccum, as space is -30, you will pull -29 in vaccum. Also, if your local fridge repair man is charging AC systems without lisence to do so, he is violating federal law.
And how do you vent the refrigerant that was already in the system before you pull a vacuum on it?VJ RC51 said:I fix my AC system all the time when i tear it apart for various reasons.
I have a vacuum pump and snap-on gauges. I leave the pump on for 1hr. Then filler up with 2 cans of R134a. The system takes 900grams in my Soarer.. and two cans is like 750grams. I dont feel like wasting half a can for that extra amount, its ICE cold.
This is because R-12, along with alot of the aftermarket A/C "enhancers" use propane, methane, and chlorine as a refrigerant.jong said:Actually.. a little fun fact... ( someone correct me if i'm wrong) When R-12 or freon is mixed with air, it becomes combustable, and when combusted, one of the byproducts is phosgene -- a chemical weapon used in WWI that attacks the tissues in the lungs similar to mustard gas
ya-- i was right.. "One hazard of R-12 as a refrigerant is the health risk should leakage of the vapor come into contact with an open flame of high temperature (about 1022°F) and be decomposed into phosgene gas, which is highly toxic"