The chemical stability of the refrigeration system plays
an important role in the efficient operation and longevity of the A/C system.
When air, moisture or particulate contamination are introduced into
the refrigeration system, the following results will occur:
| • | The chemical stability of R-134a and polyalkylene glycol (PAG)
synthetic lubricant will change. |
| • | The pressure/temperature symmetry will change. |
| • | The A/C system efficiency will be diminished. |
| • | Internal A/C system parts may corrode and/or wear in an abnormal
manner. |
Use the following general practices to maintain chemical stability in
the refrigeration system:
| • | Wipe away dirt and/or oil before you break a refrigerant connection.
This will reduce the possibility of particulate contamination. |
| • | Cap, plug or tape both sides of an open connection as soon as
possible. This will minimize the amount of dirt and moisture entering the
system. |
| • | Ensure that the following remain clean and dry: |
| - | The tools being used for the repair |
| - | The surrounding area of the repair |
| - | The hoses and connectors for the ACR4 machine or manifold gage
set |
| • | When adding polyalkylene glycol (PAG) lubricant, ensure the transfer
device and the container remain clean and dry to minimize moisture intrusion. |
| • | Do not leave the A/C system open any longer than necessary. |
| • | Before recharging an A/C system that has been opened, properly
evacuate and vacuum test the system. |
| • | Service parts are dehydrated and sealed prior to shipping. Retain
the parts in their sealed packages until you are ready to use them. |
| • | Ensure the parts are at room temperature before opening the packages.
This prevents condensation on the parts from humidity in the atmosphere. |
| • | Attach the A/C service equipment quick-connects as soon as possible
after removing the service caps. |
