Pressure-Temperature Relationship of R-134A

Pressure-Temperature Relationship of R-134A

Evaporator Range:From -7 to 7 °C (19.4 to 44.6 °F), the temperatures represent the gas temperatures inside the coil and not on the coil surfaces. Add 2 to 6 °C (4 to 11 °F) to the coil and air-off temperatures.
Condenser Range:From 45 to 70 °C (113 to 158 °F), the temperatures are not ambient. Add 19 to 22 ° C (34 to 40 ° C) to the ambient temperatures for proper heat transfer. Then refer to the pressure chart.
Example:
32 ° C (90 ° F) Ambient temperature + 22 ° C (40 ° F) = 54 ° C (130 °F)
Condenser temperature, which yields 1379 kPa (200 psig), based on 50 km/h (31 mph) airflow.