System Evacuation
Use only service equipment that is U.L-listed and is certified to meet the requirements of SAE J2210 to remove HFC-134a(R-134a) from the air conditioning system.
CAUTION:
- Air conditioning refrigerant or lubricant vapor can irritate your eyes, nose, or throat.
- Be careful when connecting service equipment.
- Do not breathe refrigerant or vapor.
If accidental system discharge occurs, ventilate work area before resuming service.
Additional health and safety information may be obtained from the refrigerant and lubricant manufacturers.
- When an A/C System has been opened to the atmosphere, such as during installation or repair, it must be evacuated using an R-134a refrigerant
Recovery/Recycling/Charging System (if the system has been open for several days, the receiver/dryer should be replaced, and the system should be evacuated for several hours).
- Connect an R-134a refrigerant
Recovery/Recycling/Charging System (A) to the high-pressure service port (B) and the low-pressure service port (C) as shown, following the equipment manufacturer's instructions.
- If the low-pressure does not reach more than 93.3 kPa (700 mm. Hg, 27.6 in. Hg) in 10 minutes, there is probably a leak in the system. Partially charge the system, and check for leaks (see LEAK TEST ).
- Remove the low pressure valve from the low-pressure service port.