A/C - System Retrofit from (R-12) to (R-134): Service Precautions

A. Refrigerant handling

1. Do not handle refrigerant in an enclosed area or near an open flame.

2. Always wear eye protection.

3. Avoid getting liquid refrigerant in your eyes or on your skin.

4. Never heat a container with an open flame.

5. Keep containers below 104°F.

6. When heating a refrigerant can with water, keep the valve above water.

7. Never reuse empty service cans.

B. Replacing parts

1. Plug off any open connections to prevent the entry of moisture and dust.

2. Do not remove plugs from Receiver ports until it is ready for installation.

C. Tightening connecting parts

1. Apply a few drops of ND-Oil 8 compressor oil to 0-ring fittings before tightening.

2. Avoid twisting refrigerant piping when installing R134a service fitting adapters.

3. Tighten all fittings to specified torque.

D. Recharging with A/C "on"

1. Never open the high side valve with the engine running.

2. Never run the A/C system when low on refrigerant as compressor damage may occur.

3. Never charge the system with liquid refrigerant with the engine running.

4. Be careful not to overcharge the system.

NOTE:
Oil removed during R-12 evacuation should not be used with an R134a System.