Maintaining Chemical Stability

The life and efficient operation of the air conditioning system depends upon the chemical stability of the refrigerant system. Refrigerant-134a and Polyalkaline Glycol (PAG) refrigerant oil's stability changes when the following materials contaminate the refrigeration system:
^ Dirt
^ Air
^ Moisture

The foreign materials will cause the following to occur:
^ Affect the pressure-temperature relationship
^ Reduce efficiency
^ Cause internal corrosion
^ Abnormal wear of moving parts

The following general practices should be followed in order to ensure chemical stability in the system:
1. Wipe away any dirt or oil at or near the connection in order to eliminate the possibility of dirt entering the system when disconnecting a hose.
Perform the following at both sides of the connection in order to prevent dirt or moisture entering the hose connection
^ Cap both sides of the connection
^ Plug both sides of the connection
^ Tape both sides of the connection
2. Keep the manifold gauge set clean and dry. Keep the replacement parts clean and dry.
3. Ensure that the container and transfer tube through which the oil flows is exceptionally clean and dry.
4. Ensure the refrigerant oil is free of moisture.
5. Have everything needed ready when opening the air conditioning system. DO NOT leave the air conditioning system open any longer than necessary.
6. Properly evacuate the open air conditioning system before recharging the air conditioning system.