How do you retrofit an R12 to a R134a?
Find the high and low side service ports for the R12 air-conditioning system. Push the low side retrofit R134a fitting over the old fitting and use a wrench to tighten it. Torque the fitting to 20 foot-pounds. Push the high side retrofit R134a fitting over the old fitting and use a wrench to tighten it. Torque the fitting to 20 foot-pounds.
What’s the difference between R12 and R134a compressors?
The molecules of R134a were smaller than R12, so it was feared to leak out of the flare fittings and hoses which were in use by previous R12 systems. R134a operates at higher discharge pressure, which can cause compressor seals to leak out.
How do you change the refrigerant on an R12?
Start the engine and switch the air conditioning to highest setting. Put a thermometer in the center vent to measure the temperature as you add refrigerant. Connect the T-valve hose to the low side service port. Open the valve and allow the system to draw the refrigerant out of the can–you can feel the can get colder and lighter.
Is it illegal to release R12 from air conditioner?
Freely releasing R12 refrigerant out of your air conditioning system is illegal. Have a professional remove the old R12 refrigerant. Never open the valve connected to the high side service port when the system has a charge. The gas inside is pressurized.
How to convert auto R12 system to R134a?
Here’s how to convert R12 to R134a with the factory method 1) Discharge the R12 and recover the R12 for recycling. 2) Flush evaporator and condenser with AC flush kit to remove mineral oil 3) Flush AC high pressure and suction lines to remove mineral oil
Is there a drop in replacement for R12?
With the phase-out of R12 (1st January 1996) many compromises have to retrofit to R134a. No direct “drop-in” replacement is available, even alternatives such as ternary blends require the replacement of components such as “O” rings on some systems, filter dryers or accumulators.
Which is better for AC R12 or R134A?
R134a doesn’t cool as efficiently as R12, so even when properly charged your system won’t cool as well. Plus, R134a has a lower tolerance for over/under charging. In fact, you’ll DECREASE AC performance by adding too much R134a refrigerant. That’s just the opposite of R12.
Can a retrofit be done on an R134A?
The cost will be a very important issue if an R134a retrofit is to be undertaken, but do not sacrifice performance and reliability for the sake of cost. As further documented there will be slight temperature and pressure increases within the system.