what is the proper charge of freon on ac unit, how to use the gages to check proper charge?

Answer 1

Okay...assuming it's a 10 seer unit, this almost always works. Hook up your gauges ( You have got to know how to do this ) Turn on the unit. Your Low side reading, at around 90 degrees outside, should be around 70-75. If not, add freon until you hit that mark. Now grab the large copper line. Does it feel like a cold beer? Fresh out of the Frig? Good. you're there. If not, add a little more until you get there. This is a very basic get you running type of thing, but it shouuld work. If you need more info, mail me!! Hope that helps

Answer 2

The proper charge of "freon" is when there is enough charge for the unit to operate at its designed performance, given that all the other parameters of the system, are within specification. The gages by themselves cannot be used to identify a proper charge. That is why I get paid so much, I fix a/c after others give it a try.

Answer 3

If you know how to operate your gages, you can properly charge a a/c unit. If you think that the unit is low, first you should look for leaks. Look for oil on any solder joints or fittings. A spot of oil is a defiantly a leak.
If your unit is only low. Put your gages on while the unit is off. Start the condenser. Take the out door temp around the unit. (Ambient Temp) Add 23 to the temp you have. Now look on your high side gages, and look on one of the center set of numbers. Look for green numbers for R-22. Add liquid freon very slowly until you get the needle to the number you came up with.

Example IF the out side temp is 90 add 23 you have 113. Add freon until the needle rest on 113.

Answer 4

You must have a universal refrigeration licence from the EPA to service a A/C or you can get a $10,00.00 fine