Quote:
Originally Posted by dkveuro
Are you suggesting that the compressor can auto ignite the oil in an a/c system ? or the gas, should you be using propane?
I think you ought to read this : Fuels and Chemicals - Auto Ignition Temperatures
These temperatures listed only exist inside a diesel engine and to start most diesels it is often only with the aid of glow plugs...ie: An ignition point.
I doubt any refrigerant pump can run at these temps'....and where would the ignition point be ?
The 'hole in the ground' sounds spurious.
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I think he may be referring to the danger of oxygen + oil in an oxy-acetylene regulator/tanks setup, where pressures can be in thousands of psi. But we are talking air at 200 psi.
"By volume, dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.039% carbon dioxide, and small amounts of other gases. Air also contains a variable amount of water vapor, on average around 1% at sea level, and 0.4% over the entire atmosphere."
I was wondering if air can be used to do a poor man's "nitrogen" pressure test in a mobil AC system since it is 78% nitrogen. Is there a danger of an explosion with 21% oxygen and refrigerent oil pressurized to 200 psi? Gut feeling WAG tells me no.
Granted, some moisture (relative humidity dependent) will be introduced from ambient air, but since the dryer and TXV will be replaced and the system evacuated afterwards, whatever moisture introduced will be removed.