Maintaining Chemical Stability

The life and 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:
- 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
- Keep the manifold gauge set clean and dry. Keep the replacement parts clean and dry.
- Ensure that the container/transfer tube through which the oil flows is exceptionally clean and dry.
- Ensure the refrigerant oil is free of moisture.
- Have everything needed ready when opening the air conditioning system. Do NOT leave the air conditioning system open any longer than necessary.
- Properly evacuate the open air conditioning system before recharging the air conditioning system.