The efficient operation and the life of the A/C system
is dependent upon the chemical stability of the refrigeration system. When
foreign materials such as dirt, air or moisture contaminate the refrigeration
system, the following conditions may occur:
| • | A change of the stability of the Refrigerant-134a (R-134a) and
the Polyalkylene glycol (PAG) oil |
| • | An effect on the pressure-temperature relationship |
| • | A reduction in the efficient operation of the A/C system |
| • | Corrosion of the moving parts |
| • | Abnormal wear of the moving parts |
Observe the following general practices in order to ensure the chemical
stability in the system:
| • | Before you break a refrigerant connection, wipe away any dirt
or oil in order to reduce the possibility of dirt entering the system. |
| • | Perform one of the following procedures on a broken refrigerant
connection as soon as possible. |
| | This will prevent dirt, moisture or foreign materials from entering
the system: |
| • | Keep your tools clean and dry. |
| | This includes the following items: |
| • | Ensure that the transfer device and container are exceptionally
clean and dry when you are adding PAG refrigerant oil. |
| | This will ensure that the refrigerant oil remains as moisture-free as
possible. |
| • | Do not leave the A/C system open any longer than necessary. |
| | When you open the A/C system, have everything that you will need ready
and handy so that you will be able to perform the operation in as little time
as possible. |
| • | Any time that you open the A/C system, properly evacuate the system
before you recharge the system with R-134a. |
| • | All service parts are dehydrated and sealed prior to shipping. |
| | Leave the service parts sealed until just prior to making connections. |
| • | Ensure that all parts are at room temperature before you uncap
the system. |
| | This prevents condensation of moisture from the air entering the system. |
| | If, for any reason, you remove the caps, but you do not make the connections,
reseal the parts as soon as possible. |
