Pressures represent gas temperatures inside the coil, not the coil surface. For an estimate of the temperature of the air coming off the coil add -12.5 ± -0.5°C (9 ± 1°F) to the temperature on the chart.
Temperatures are not ambient temperatures but condensing temperatures. Add 4°C (40°F) to the ambient temperature to get the condensing temperature and then refer to the pressure chart to see appropriate pressure for ambient temperature.
Example: Ambient Temperature = 32°C (90°F)
+ 4°C (40°F)
54°C (130°F) condenser temperature = 1379 kPa (14 bar) (200 psig)
Conditions and pressures will vary from system to system.