TM 5-3805-290-23-1
AIR CONDITIONING SYSTEM TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
0018 00
REFRIGERANT SYSTEM CHARGE
0018 00
Relationship Between Temperature and Pressure (R-134a Refrigerant)
Table 3 can be used in order to determine pressure level and contamination level of a container of refrigerant. Table 3
can also be used for an AC system that is not operating. This same system must be stabilized to ambient temperature. In order
to stabilize an AC system at ambient temperature, machine must not operate for 10 to 12 hours. Machine must not be stored in
direct sunlight.
If pressure measured at any specific temperature does not match pressure given in chart, the following problems may
exist:
Contaminants in system.
Incorrect refrigerant.
Incorrect refrigerant charge.