What is doubtful of many, is the working pressure of this refrigerant fluid R-410ª compared to the R-22 refrigerant gas.
To handle and set the working pressure, it is necessary to have a proper Manifold for this gas, as it would be much easier, and logically would be the correct way to work.
When using the Manifold, many people are guided only by the PSI scale of the manifold. This is not wrong, but for anyone who has seen one, know that there are several scales on your display, one for each type of coolant that it was made to be used.
Following the correct scale for each refrigerant: Let's take R-22 refrigerant as an example, as it is more common and more used. When we learn the correct pressure, the most common is to know that the working pressure of the "low" is 60 PSI, if we look at the scale relative to the R-22 we will see that aligned at approximately 60 PSI we have the number "0", because then , this is the scale to be followed and the correct pressure, "0" means the right pressure and then comes the plus or minus numbers (with a -) sign saying if gas is left or missing (pressure) in the machine. According to these steps, we can use any manifold for any gas, in the correct way.
Going back to R-410A, it's the same thing, but the scale follows it, but for those who do not have a manifold for R-410A, I explain that this refrigerant works with pressure 1.6 times at the R-22 pressure , that is:
Recalling that the R-22 PSI working range in the "low" (suction line) is between 55 and 80 psi, which in the temperature table corresponds between -1 and 8 degrees Celsius, it was agreed to use the a stricter range between 60 and 65 as ideal. R-410A refrigerant operates at the same temperature reference, but pressures are around 72 to 104 psi.
The ideal working pressure varies according to the equipment and applications to be used, and for air conditioning it starts from 100 going maximum at 150 psi.
Also note that the discharge pressure (liquid line) must be taken into account and that it should not exceed 360 psi or unless otherwise instructed by the manufacturers in the installation manuals.
A good way to orient yourself is to take into consideration the working temperature, ie if it is 10 degrees, the refrigerant gas will produce this temperature.
