-Eliminar Incondensable gases within the system (air, nitrogen);
The presence of condensable gases causes the variation of the system operating pressures and reduced their capacity.
-Desidratar The system, ie to remove the moisture contained therein;
Moisture is able to produce even more deleterious effects, such as oxidation of metal parts, change in density of oil and loss of lubrication. However, the worst effect results from the formation of an acid, when water reacts with the refrigerant and the oil system; this acid erodes the compressor wound varnish causing its burning (compressor
