Alkylbenzene Oil - What Oil Is In R22?

R22 air conditioners use mineral oil and R410A systems use synthetic oil. The synthetic oil is generally more soluble with R410A than mineral oil is with R22.

What happens if you dont put oil in AC compressor?

Eventually, if the oil is not changed, the compressor element will fail and shut down.

Does R134a use mineral oil?

So the oil must be compatible with the refrigerant. R12 systems used mineral oil, but unfortunately mineral oil doesn't dissolve in R134a. So, along with R134a came a new oil: Polyalkylene Glycol—or PAG oil. Note that there is another kind of oil called Polyol Ester Oil (POE).

Can you mix POE and PAG oil?

POE/ESTER OIL Because mineral oil and PAG oil cannot be mixed, another A/C compressor oil was needed to bridge the gap for system conversions. The transitional solution was polyol ester oil (“ester” oil or POE). Ester oil is often called “retrofit oil” because it mixes with both R-12 and R-134a.

Can you mix different PAG oils?

The two oils do not mix completely and cannot create a long-lasting homogenous mixture, which is needed to ensure the correct lubrication of the mechanical parts within the compressor.

What is refrigerant oil used for?

Where the refrigerant is essential for the cooling properties of a refrigeration system, the refrigeration oil is crucial for the correct functioning of the compressor. Lubricants for refrigeration compressors reduce friction, prevent wear and act as a seal between the high and low pressure sides.

Can you use POE oil in an R-22 system?

The refrigerant R-22 is compatible with POE oils.

Are all POE oils the same?

Are all POE refrigerant oils the same? No. Oils vary in viscosity, formulation, etc. and are designed for different applications in different compressors.

Is PAG oil the same as refrigerant?

PAG, in various viscosities, is the recommended refrigerant oil for most R134a vehicles since the mid-nineties. Consult manufacturer service guides for specific vehicles, especially imports and hybrids, as some compressor manufacturers have very specific requirements.

Why should PAG oil not be exposed to air?

The disadvantage of PAG oils is that they are hygroscopic, which means that they absorb and bind moisture from the ambient air. If the moisture content in the air conditioning system is too high, this can contribute to the formation of acids and corrosion, resulting in damage to components and leaks.

Will 134a work with alkylbenzene oil?

R-134a is a single component refrigerant rated A1 by ASHRAE (lowest levels of toxicity and flammability), having zero ozone depletion potential. POE or PAG (polyalkylene glycol, auto only) lubricants must be used with R-134a since it is not miscible with mineral oil or alkylbenzene lubricants found in many systems.

What is alkylbenzene oil?

Alkylbenzene (AB) – is a synthetic oil suitable for refrigeration systems using CFC or HCFC refrigerants. It is compatible with mineral oil and compared to mineral oil, it has improved refrigerant miscibility with R-22 at low-temperature conditions.

What can you mix with R22?

The most commonly mixed refrigerants in the field are the replacements for R-22 — R-427A, R-438A, R-422D, and R-407C — which are often combined with the remaining R-22 in the system, said Maiorana.

What is the most common refrigerant oil used today?

Polyolester (POE) – The most common oil utilized in refrigeration and air conditioning systems using HFC/HFO refrigerants. It is also suitable for systems using CFC or HCFC refrigerants.

Does R12 and R134a use the same oil?

Oil Can Be Incompatible As previously stated, R12 systems usually use mineral oil, which is incompatible with R134a.

What oil do I use for 134a conversion?

R-134a systems require PAG (polyalkylene glycol) oil of a certain grade. PAG oil is hygroscopic, meaning that it readily absorbs moisture from the air. Never leave the cap loose when storing PAG refrigerant oil. Some manufacturers recommend using less hygroscopic POE (Polyol Ester) oil instead of PAG after a retrofit.

What is the biggest concern with POE oil?

One major concern with POE oils is that they are hygroscopic. If they remain in contact with air, they have the ability to absorb its moisture. For a technician, this means that when a repair requires opening a system, it should only be left exposed to the atmosphere for as long as necessary to complete the repair.

Is refrigerant oil the same as Freon?

Freon vs. Refrigerant. What's the difference? Short answer: all Freon is refrigerant, but not all refrigerants are Freon.

Can you mix refrigerant oils?

Mixing oils While mixing A/C Compressor oils is usually not recommended, as it can lead to A/C Compressor damage and failure, the new ND-oil 12 can be used with both R1234yf and the old R134a type refrigerants.

What happens if you add too much PAG oil?

If you've added more oil than recommended to the system, it could pool in a couple of places in the system besides coating condenser coils and the evaporator's inner walls. The net effect is a diminished ability to absorb/dissipate heat and you'll experience a downturn in the system's overall cooling performance.