Ckl 42-1l how many lbs of r22 is needed

R 22 will intoxicate the system due to different compatibilities with lubricant.
The 407 uses Ester and 22 mineral oil. R22 in a Esters oil environment may cause gunk.
Install proper labeling indicating loud and clear that the system is not R22 for future reference.
You know what needs to be done.

Typically the M# has the identification on if the unit uses R22 or R410. Look at the data plate. Or get the M# S#

The capacity is not important unless it is empty. If it was empty it wouldn't be freezing. You should be charging with subcooling and superheat.

If it has enough freon to freeze up then its not that low. Normally a 4-5 ton cooling only (non heatpump) will hold 7-9 lbs r-22 or 9-11 r-410a. Freezing can be caused by dirty air entering side of the coil also. Or slow blower

If he only added R-22 for 5 seconds, then no, it did not take 2 lbs. Even if this was possible, the R-22 being upside down, (meaning it was charged in a liquid state), it would flood the compressor and more than likely cause damage. Now, it does not take long to add 2 lbs, charging with liquid, but almost impossible in 5 seconds with refrigerant already in the system. Sorry to hear about your situation, unfortunately I hear this same scenario far too often.

Hello, the unit is a 3 ton and was built in 2004. 0z R22 stands for R-22 refrigerant. Not sure why he told you 410a but if the unit says R-22 than that must be used.

This is a 2.5 ton unit. The 30 in the model # stands for 30K btu's which equals 2.5 tons. How many square feet is your house and is it insulated?

Hello TF YES to make ice on low freon you lost more than 1/2 of the factory/system charge.4 lbs is about rite.I would like to find the freon leak as you will always have to replace the gas every now & again untill found & repaired.

CHECK WIRING MAKING SURE NOTHING FELL OFF BUT IF NOT REPLACE THE MOTOR BEFORE YOU BLOW YOUR COMPRESSOR

It is most likely R22, And holds less than 3 lbs. Thank you for using Fix ya and please rate me higher than global warming.