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3. Open the suction and discharge valves and start the vacuum pump. The vacuum pump should run a minimum of 45 minutes prior to charge to eliminate all moisture in system. When the suction gauge reads to the lowest 4. Close all valves. Turn off and disconnect the vacuum pump. 5. Charge the refrigerant system (refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - STANDARD PRO- CEDURE - REFRIGERANT SYSTEM CHARGE). REFRIGERANT SYSTEM CHARGE WARNING: Refer to the applicable warnings and cautions for this system before performing the following NOTE: Always refer to the Underhood HVAC Specification Label for the refrigerant fill specification of the After all refrigerant system leaks have been repaired and the refrigerant system has been evacuated, a refrigerant An R-134a refrigerant recovery/recycling/charging station that meets SAE Standard J2210 must be used to charge CHARGING PROCEDURE CAUTION: A small amount of refrigerant oil is removed from the A/C system each time the refrigerant sys- 1. Evacuate the refrigerant system (refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - STANDARD PRO- CEDURE - REFRIGERANT SYSTEM EVACUATE). 2. A manifold gauge set and an R-134a refrigerant recovery/recycling/charging station that meets SAE standard J2210 should be connected to the refrigerant system. 3. Measure the proper amount of refrigerant and heat it to 52° C (125° F) with the charging station. See the oper- ating instructions supplied by the equipment manufacturer for proper use of this equipment. 4. Open both the suction and discharge valves, then open the charge valve to allow the heated refrigerant to flow into the system. 5. When the transfer of refrigerant has stopped, close both the suction and discharge valves. 6. If all of the refrigerant charge did not transfer from the dispensing device, open all of the windows in the vehicle and set the heating-A/C system controls so that the A/C compressor is operating and the blower motor is running 7. Open the low-side valve to allow the remaining refrigerant to transfer to the refrigerant system. WARNING: Take care not to open the discharge (high pressure) valve at this time. Failure to follow this 8. Disconnect the charging station and manifold gauge set from the refrigerant system service ports. 9. Reinstall the caps onto the refrigerant system service ports. PM PLUMBING 24 - 121 |