A/C help

Paging @lech auto air conditionin ...

 

This is a very good and detailed and specific question regarding oil loss and quantity.

i’m going to assume when you said radiator you meant condenser

that small metal line contains the largest amount of liquid repellent mixed with the largest continent of oil

If this line gets severed with a instant large burst of loss of refrigerant it also carries out A little extra refrigerant oil with it.

So usually if you buy an OEM DENSO condenser it comes with a small can of ND 11 DENSO oil That will contain 45 mL oil
This is enough oil just for a brand new condenser replacement without any additional lost due to a quick and fast rupture of a line.

So in this particular situation I would add an extra 20 to 30 mL of oil.

and if you’re doing this yourself and you have access to a vacuum pump or you have one of the big chain store parts warehouse that rent you a vacuum pump.

I would recommend leaving it on the pump overnight.

this will help in addition to attempt to remove some of the moisture that has absorbed into the remaining refrigerant oil in the system you will never get it all out but the longer you can keep it on the vacuum pump the more milligrams of water you will remove from the surface of the oil residue throughout the system.

 

Also as the manual explains charge fresh R134a by weight only not by pressures. 450g +-30g or 15.9oz +-1.1oz.

If using 12oz cans, get weight of can before charging and after it is empty or not charge any more. For example difference could be 9.6oz for first can. Then continue same process for the second can which will add for example another 6.3 oz and have some R134a left after you finish.

 

If you're concerned to make sure you don't run the compressor before repairing and recharging, I'm pretty sure just unplugging the pressure switch will ensure that for you. It will set an HVAC code, of course, which you probably already have.