How To Read an HVAC Temperature Pressure Chart
If the refrigerant is too low or high, the unit will not operate and cause problems such as freezing up or other problems. Pressure changes as the temperature changes so a pressure temperature chart is used as a reference to get the right range needed.
What is a Pressure Temperature Chart? A pressure temperature chart gives the correct range of pressure that a refrigerant operates at the current temperature.
The outside temperature will be needed along with HVAC gauges to read a systems pressure, and refrigerant type. Once the refrigerant type and outside temperature are known, the chart will show the pressure the system should be at.
Example HVAC Temperature Pressure Chart on Amazon PT Chart R22/R-410A Laminated Pocket Aid Pressure/Temperature 34-3400-02
