In domestic refrigeration, because most systems operate with a low amount of refrigerant (less than 350g) and use capillary tube as a flow control element, the performance of the system will depend on the amount of refrigerant applied. Now, with the alternative refrigerant fluids, an appropriate procedure and the use of the necessary equipment for this operation becomes more important. Example: A system with an internal volume of 280 to 300 liters usually runs with 90 to 120 grams of R 134a fluid.
With R600a, systems in this internal volume range may be from 36 to 48 grams only, or approximately 40% of the R 134a load.
With respect to the original charge with R 134a, the charge of refrigerant R 134a is approximately 90%.
This reality proves the need for a good procedure and precise equipment to successfully carry out a refrigerant charge.
This operation requires a lot of care from the refrigeration. In case of excess refrigerant, the compressor can suck the liquid refrigerant and rupture the cylinder gaskets, or break other components such as valve plates and so on.
In case of failure, the system will not perform satisfactorily.
