Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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System Specifications

R134a Press. and Temp. Relationship
Temp/Press Relationship
Similar to R-12 refrigerant, R-134a in an enclosed container will have a specific temperature/pressure relationship as shown in chart.
0 at -22 Pounds Square Inch At Degrees Fahrenheit (psi @ deg F)
-4 at 4.4 Pounds Square Inch At Degrees Fahrenheit (psi @ deg F)
14 at 14.5 Pounds Square Inch At Degrees Fahrenheit (psi @ deg F)
32 at 27.5 Pounds Square Inch At Degrees Fahrenheit (psi @ deg F)
50 at 45.0 Pounds Square Inch At Degrees Fahrenheit (psi @ deg F)
68 at 68.2 Pounds Square Inch At Degrees Fahrenheit (psi @ deg F)
86 at 97.2 Pounds Square Inch At Degrees Fahrenheit (psi @ deg F)
104 at 132.0 Pounds Square Inch At Degrees Fahrenheit (psi @ deg F)
122 at 177.0 Pounds Square Inch At Degrees Fahrenheit (psi @ deg F)
140 at 229.2 Pounds Square Inch At Degrees Fahrenheit (psi @ deg F)
158 at 293.0 Pounds Square Inch At Degrees Fahrenheit (psi @ deg F)