There are various methods of charging refrigerant into the air conditioning system, including using J-39500 (ACR4:HFC-134a Refrigerant Recovery/ Recycling/ Recharging/ System) or equivalent and direct charging with a weight scale charging station.
ACR4 (or equivalent) Method
For the charging of refrigerant recovered by ACR4 (or equivalent), follow the manufacturer's instruction.
Direct Charging With A Weight Scale Charging Station Method
- Make sure the evacuation process is correctly completed.
- Connect the center hose of the manifold gauge to the weight scale.
- Connect the low pressure charging hose of the manifold gauge to the low pressure side service valve of the vehicle.
Connect the high pressure charging hose of the manifold gauge to the high pressure side service valve of the vehicle.
Place the refrigerant container (3) upright on a weight scale (4).
- Note the total weight before charging the refrigerant.
- Open the refrigerant container valve.
- Open the low side vale on the manifold gauge set. Refer to the manufacturer's instructions for a weight scale charging station.
Perform a system leak test, as follows:
- Charge the system with approximately 200 g (0.44 lbs) of HFC-134a.
- Make sure the high pressure valve of the manifold gauge is closed.
- Check to ensure that the degree of pressure does not change.
- Check for refrigerant leaks by using a HFC-134a leak detector.
- If a leak occurs, recover the refrigerant. Repair the leak and start all over again from the first step of evacuation.
- If no leaks are found, continue charging refrigerant to the air conditioning system.
- Charge the refrigerant until the scale reading decreases by the amount of the charge specified: 650 g (1.43 lbs)
If charging the system becomes difficult:
CAUTIONBe absolutely sure not to open the high pressure valve of the manifold gauge. Should the high pressure valve be opened, the high pressure refrigerant would flow backward, and this may cause the refrigerant container to burst.
Run the engine at idle and close all the vehicle doors.
- When finished with the refrigerant charging, close the low pressure valve of the manifold gauge and container valve.
- Check for refrigerant leaks.