Can I recharge an R12 system with R134a?

Can I recharge an R12 system with R134a?

No. Federal law prohibits topping off an R12 system with a different refrigerant. Your options are to locate some R12, however you must be certified to purchase, and add it with an R-12 recharge hose.

Is R12 heavier than R134a?

The volume of r134a refrigerant is lighter than the same amount r12 refrigerant. This not only is important to know for commercial refrigeration units, but it also is vital when making repairs on HVAC equipment and even cars.

What is the ratio of R12 to R134a?

The conversion is determined by multiplying the R12 charge value by . 75 (R12 charge x . 75 = R134a charge).

When retrofitting a system from R12 to R134a what is required to be done?

How to Convert Car AC R12 to R134a

1. Discard R12. Before you do anything else, you need to pump out the R12 refrigerant that is currently in the system.
2. Retrofit the System. You must add new fittings to both the low and high side service ports on the AC system.
3. Hook up Gauges.
4. Pump in R134a Refrigerant.

Is R12 colder than R134a?

R12 can blow 6 to 7 degrees cooler than R134a and is 15% more efficient. R134a systems require larger condensers and higher operating pressures than R12 systems because R134a doesn’t have as high of a heat transfer rate as R12 (which has a heavier molecular size than R134a).

Can I mix R12 and 134a?

Mixing R12 and R-134a refrigerants is illegal, and even if you previously bleed out the R12, the system has to be adjusted to use R-134a, or it will cause leaks, copper corrosion, and lack the lubrication required for optimal operation.

Can you still purchase R12 refrigerant?

It is illegal to manufacture new R12, but it is not illegal to sell or use R12. And many of the cylinders and cans of Freon R-12 sold for decades throughout the United States are still around.

What will happens if you put R134a in a R12 system?

R134a systems work at higher discharge-side pressures than R12 systems, which could lead to compressor seals leaks. Additionally, since R134a is composed of much smaller molecules, it has a greater chance of leaking from an R12 system.

Can you still buy R12 refrigerant?

R12 Refrigerant Today It is illegal to manufacture new R12, but it is not illegal to sell or use R12. And many of the cylinders and cans of Freon R-12 sold for decades throughout the United States are still around.

Can you put R12 in a R134?

What happens if you put r12 in a r134a system? The oils are different and not compatible and can cause an explosion. R134a is also a smaller molecule than r12 so if you HAD a small leak with r12 that you did not fix you have an even bigger leak now.

How to put R134 into a R12 system?

Recover all R12 and dispose of it correctly.

Remove all traces of the mineral oil.

Re-charge the lubricant wit a polyol ester lubricant.

Replace the expansion device with the appropriate device.

Evacuate the system and replace the filter drier with a compatible drier.

Re-charge with R134a to the correct charge by superheat,subcooling and sight glass.

Can I replace R12 with R134A?

The best replacement for R12 is considered to be R-134a. The chemical name of R134a is tetrafluoroethane and it chemical formula is CF 3CH 2F. It is a hydrofluorocarbon (HFC) and has zero ozone depletion causing potential and very low greenhouse effect.

What do I need to convert from R12 to R134a?

Discharge the R12 and recover the R12 for recycling.

Flush evaporator and condenser with AC flush kit to remove mineral oil

Flush AC high pressure and suction lines to remove mineral oil

Empty oil from compressor

Add specified Ester or PAG oil in the proper viscosity to the compressor,condenser and evaporator.