Pressure-Temperature Relationship of R-134A

EVAPORATOR RANGE: From -6.67 to 7.22 °C (20 to 45 °F), the temperatures represent the gas temperatures inside the coil and not on the coil surfaces. Add 1.67 to 5.56 °C (3 - 10 °F) to the temperature for coil and air-off temperatures.

CONDENSER RANGE: From 110 to 160 °F temperatures are not ambient. Add 19.4 to 22.2 °C (35 to 40 °F) 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 1379 kPa (200 psig)
Based on 48.3 kph (30 mph) air flow.