Chrysler 2005 Crossfire SRT6 Service Manual page 4262

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STANDARD PROCEDURE - REFRIGERANT SYSTEM CHARGE
WARNING: REVIEW THE WARNINGS AND CAUTIONS IN THE FRONT OF THIS SECTION BEFORE PER-
FORMING THE FOLLOWING OPERATION. (Refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - WARN-
ING).
After the refrigerant system has been tested for leaks and evacuated, a refrigerant charge can be injected into the
system.
A R-134a refrigerant recovery/recycling/charging station that meets SAE Standard J2210 must be used to charge
the refrigerant system with R-134a refrigerant. Refer to the operating instructions supplied by the equipment man-
ufacturer for proper care and use of this equipment.
PARTIAL CHARGE METHOD
WARNING: REVIEW THE WARNINGS AND CAUTIONS IN THE FRONT OF THIS SECTION BEFORE PER-
FORMING THE FOLLOWING OPERATION. (Refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - WARN-
ING).
The partial charge method is used to add a partial charge to a refrigerant system that is low on refrigerant. To
perform this procedure the evaporator inlet and outlet tube temperatures are measured. The temperature difference
is measured with a temperature meter with one or two clamp-on thermocouple probes. The difference between the
evaporator inlet and outlet tube temperatures will determine the amount of refrigerant needed.
Before adding a partial refrigerant charge, check for refrigerant system leaks. (Refer to 24 - HEATING & AIR CON-
DITIONING/PLUMBING - DIAGNOSIS AND TESTING). If a leak is found, make the necessary repairs before
attempting a full or partial refrigerant charge.
1. Attach a manifold gauge set to the refrigerant system service ports.
2. Attach the two clamp-on thermocouple probes to the inlet and outlet tubes of the evaporator coil.
• If a single thermocouple probe is used, attach the probe to the evaporator inlet tube just before the collar of
the refrigerant line connector fitting. The probe must make contact with the bottom surface of the evaporator
inlet tube.
• If dual thermocouple probes are used, attach probe 1 to the evaporator inlet tube, and probe 2 to the evap-
orator outlet tube. Attach both probes to the evaporator tubes just before the collar of the refrigerant line con-
nector fittings. The probes must make contact with the bottom surfaces of the evaporator inlet and outlet tubes.
3. Open all of the windows or doors of the passenger compartment.
4. Set the A/C button on the A/C Heater controls to the on position, the temperature control knob in the full cool
position, select Recirculation Mode, and place the blower motor switch in the highest speed position.
5. Start the engine and hold the engine idle speed at 1,000 rpm. Allow the engine to warm up to normal operating
temperature.
6. The compressor clutch may cycle, depending upon ambient temperature, humidity, and the refrigerant system
charge level.
7. Hold the engine idle speed at 1,000 rpm.
8. Allow three to five minutes for the refrigerant system to stabilize, then record the temperatures of the evaporator
inlet and outlet tubes.
• If a single probe is used, record the temperature of the evaporator inlet tube. Then remove the probe from the
inlet tube and attach it to the evaporator outlet tube just before the collar of the refrigerant line connector
fitting. The probe must make contact with the bottom surface of the evaporator outlet tube. Allow the thermo-
couple and meter time to stabilize, then record the temperature of the evaporator outlet tube. Subtract the inlet
tube temperature reading from the outlet tube temperature reading.
• If dual probes are used, record the temperatures of both the evaporator inlet and outlet tubes. Then subtract
the inlet tube temperature reading from the outlet tube temperature reading.
9. If the measured temperature differential is higher than 22° C to 26° C (40° F to 47° F), add 0.4 kilograms (14
ounces) of refrigerant.
10. Allow three to five minutes for the refrigerant system to stabilize, then take a second set of thermocouple mea-
surements. Record the temperature difference to determine if an additional charge is required.
PLUMBING 24 - 133