Maintaining Chemical Stability

The life and efficient operation of the air conditioning system depends on the chemical stability of the refrigeration system. When foreign materials, such as dirt, air or moisture, contaminate the refrigeration system, they change the stability of the R-12 and 525 viscosity compressor oil. They will also affect the pressure-temperature relationship and reduce efficiency, and could cause internal corrosion and abnormal wear of moving parts.

The following general practices should be followed to insure chemical stability in the system:

1. Whenever it becomes necessary to disconnect a hose connection, wipe away any dirt or oil at and near the connection to eliminate the possibility of dirt entering the system. Both sides of the connection should be capped, plugged or taped as soon as possible to prevent the entrance of dirt and moisture. (It must be remembered that all air contains moisture. Air that enters any part of the refrigeration system will carry moisture with it and the exposed surfaces will collect the moisture quickly.)

2. Keep tools clean and dry. This includes the Manifold Gage Set and all replacement parts.

3. When adding 525 viscosity refrigerant oil, the container/transfer tube through which the oil will flow should be exceptionally clean and dry due to the fact that refrigerant oil should be as moisture-free as possible.

4. When it is necessary to "open" an A/C system, have everything needed ready so that as little time as possible will be required to perform the operation. Do not leave the A/C system open any longer than necessary.

5. Anytime the A/C system has been "opened" it should be properly evacuated before recharging.