I tried to post this a couple days ago but the attachment at 49K was deemed to large. I think 48 hours is long enough to wait for a go/no go from the list administrator Looking at the specs of various systems with various types of compressors, I have come to the conclusion that 6 to 8 ounces of oil is the typical charge for a rotary system such as the R4, and Sanden. The York systems, with the internal reservoir, will take about 10 ounces. george is partially right in that most systems will run with 2 ounces in suspension, but I would never start with 2 ounces. If you want a startup ratio for various sized systems, I would say 6 parts freon to one part oil. So a 42 ounce charge would call for 7 ounces of oil. I will repeat again, the biggest cause of compressor failure is loss of oil from the sytsem. A freon leak almost always will include oil loss at the same place. This is evidenced by the build up of dirt (held by the oil) at the point of the leak. After a few "annual" freon recharges, without concern for adding oil, the system is now dangerously low on oil. Now, who needs some oil? I have available several cans of high quality mineral oil recharges each containing 40 grams (1.4 ounces) of oil, and 60 grams (2.1 ounces) of freon 12. These can be shipped UPS ground and require no permits. How about 6 bucks a can and $4 shipping total, for 1 to 6 cans. 6 cans shipped would be $40 and you would be getting 12.6 ounces of R12 in small tapper cans. Charged in with the can up, the oil stays in the can. Shake the can and invert it, and all the contents go into the system. See attached photo if you are on the Striplin list.
Jim Friesen Phoenix AZ 79 300SD, 261 K miles 98 ML 320, 137 K miles
<<inline: IM000496.jpg>>
