➔ PAG oils are highly miscible with R134a (PAG oils 46 YF and 100 YF also with R1234yf
2,3,3,3-Tetrafluoropropene, HFO-1234yf, is a hydrofluoroolefin (HFO) with the formula CH2=CFCF3. It is also designated R-1234yf as the first of a new class of refrigerants: it is marketed under the name Opteon YF by Chemours and as Solstice YF by Honeywell. 6.2% vol.; 12.3% vol.
https://en.wikipedia.org › wiki › 2,3,3,3-Tetrafluoropropene
Summary: PAG Oil is used on R-134a systems from about 1995-2015. Check your manufacturer's recommendation for proper type of oil as well as specific viscosity. Because mineral oil and PAG oil cannot be mixed, another A/C compressor oil was needed to bridge the gap for system conversions.
If you add too much oil to the system, it may pool in various places of the system and can coat the inner walls of the evaporator and condenser coils. This will diminish their ability to absorb or dissipate heat, thereby bringing down the overall cooling performance.
An oil overcharge can trigger countless problems in your AC system including inadequate cooling and premature compressor failure. Keep an eye on the above too much oil in AC system symptoms to save your unit and keep cool.
To answer the question title, yes, you will have to add oil to the new refrigerant. Failure to do so will shorten the useful life of the A/C compressor's bearings through lack of lubrication. This will invariably lead to premature death of the compressor.
How do you know if your AC compressor is low on oil?
One of the earliest signs that the AC compressor is operating with an insufficient oil amount is the emergence of humming noises from your air-conditioning system. At the same time, you may notice that the compressor has suddenly become hard to start.
You will put less strain on your car's AC system if you avoid the hottest times of the day. Engine oil helps keep your car cool and should be at the proper level. The performance of your AC can be affected by the heat that zaps your car's battery.
Although in general, the PAO and PAG characteristics seem be similar, their viscosity parameter is different. Applying an oil of a different viscosity than required by the compressor producer can lead to compressor serious failures, which, in most cases, will lead to a claim rejection.
They should not be mixed with mineral oils. The result is a gelatinous, gooey mess. Although they are excellent lubricants, they can pose a logistic problem in plants. They can also have some negative effects on paints and seals, and are very expensive.
Don't mix PAG and ester oil in the same system. The above notwithstanding, always use mineral oil (not PAG or ester oil) to lubricate the O-rings when installing them on AC fittings, regardless of the refrigerant type being used. Mineral oil is insoluble in R-134a.
When replacing a part like the condenser it is a good idea to add some extra oil with the new refrigerant. Most refrigerants do have some oil in them which should be enough. The majority of the oil in the system stays in the compressor so you should not have any issues if you do not add any more.
The best way to ensure the long life of your AC compressor is to ensure that you add adequate oil any time you add refrigerant to your system. If you've discovered a need for more refrigerant in your vehicle, add BlueDevil Red Angel One Shot.
Normally you do not need to add oil to your AC compressor after it is installed, unless your installing a new compressor or if their is a leak in you AC system. If you do need to add oil check the compressor specifications on how much oil is needed.
With a vacuum pump connected to both, low and high air conditioning system sides pull a deep vacuum for at least 5-45 minutes. A vacuum of about 500 microns or 29.92 hg gauge pressure is needed for removing any moisture that may have entered the system along with the non-condensable gases while it was open.
KOG. What will happen if you don't evacuate moisture is that the acids formed by high temperature reaction of refrigerant and moisture will destroy the condenser, the evaporator, the compressor and any control valves in the system as well as any aluminum lines. In other words, every part of the entire system.
How long should you pull a vacuum on a car AC system?
So as many people wonder how long to vacuum AC system, the answer is 10-45 minutes. When concerned as to how long to vacuum AC system, you should know that usually it would take around 30-45 minutes if there is no leak in the pump. This is enough time period to get rid of moisture and dust inside the AC system.
Absolutely not. You don't need to add any oil and there will be some oil in the refrigerant when you charge the system. Pull a good vacuum with a Micron gauge to 500 microns. This will ensure all the moisture is out of the system.