We show saturation pressure of gas versus the temperature of R410a refrigerant in a table and a plot. systems operating on R410A run at a pressure of about 1.6 times that of similar systems operating on R22 and that is why R-410A can only be used in equipment designed for R410A. R410A cannot be used to retrofit existing R-22 Air conditioning equipment due to significantly higher operating pressures and much higher cooling capacity.
To ensure safe handling of R-410A, remember that the head pressure is significantly higher than R-22. Also, special service equipment is required, including a high-pressure manifold gauge set, high-pressure recovering machine and a high-pressure recovery tank From the table below you can read the R410A refrigerant saturation pressure at any given temperature in fahrenheit.
To convert fahrenheit to celsius use this formula
C/5 = (F-32) /9
The R410 pressure readings are in PSIG.Psig (pound-force per square inch gauge) is a unit of pressure relative to atmospheric pressure at sea level. Most pressure gauges are calibrated to read zero pressure at sea level, because most applications require the difference of pressure. Also if you so need it you can convert psi to bar using the following formula
100 psi = 6.895 bar
1 bar = 14.504 psi