Empowering HVAC Professionals The Comprehensive AC Pressure Table Guide

AMBIENT TEMPERATURE/RELATIVE HUMIDITY REFERENCE CHART. Relative Outside Air. Humidity. Temp (°F). (%). R-12. Discharge. Temp(F). R-12 Low. Pressure. R-12 High. But there's technically actual room for leeway up to 41psi on the low side depending on the ambient temp “chart below shows this”. My truck was ... Between 125 and 185psi on the high side 35psi to 55psi on the low side. Hold close manifold gauge to check for psi loss while running compressor a/c. °F. °C. PRESSURE (psig) ; -40, -40.0, 14.8 ; -38, -38.9, 13.9 ; -36, -37.8, 13.0 ; -34, -36.7, 12.0 ... When the fan kicks in as designed at a pressure of 250 psi, the pressure drops and then you can compare readings to the R134a chart. The 20 ... The Pressure/Temperature Chart indicates the pressure and temperature relationship for three automotive refrigerants. ... When all else fails, have an A/C ... This chart shows the pressure/temp relationship for R-12 and R-134a. Look up the ambient temp and it will show you the pressure you'll see in the system. Note ... More to explore ; a table with numbers and times for the temperature. Understanding Normal AC Pressure Gauge Readings ... Page 1. emzone A/C Temperature - Pressure Chart. TEMPERATURE. R12 emzone 12a. 134a. C. F psi psi psi. -40. -40. -5. -4. -7. -38. -36. -4. -3. -6. I would like to see a little higher on both the high and low readings. I would be adding more refrigerant and tweak it to @ High side 175psi and low side ...