System Evacuation
Use only service equipment that is U.L-listed and is certified to meet the requirements of SAE J2210 to remove R-1234yf 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 the work area before resuming the service.
Additional health and safety information may be obtained from the refrigerant and lubricant manufacturers.
- When an A/C system has been open to the atmosphere, such as during installation or repair, it must be evacuated using a R-1234yf refrigerant Recovery/Recycling/Charging system.
(If the system has been open for several days, the receiver/drier should be replaced, and the system should be evacuated for several hours.)
- Connect a R-1234yf refrigerant Recovery/Recycling/Charging system (A) to the high-pressure service port (B) and the low-pressure service port (C) as shown in illustration, following the equipment manufacturer's instructions.
- If the low-pressure does not reach more than 87.7 kPa (658 mmHg, 25.9 in.Hg) in 5 minutes, there is probably a leak in the system. Partially charge the system, and check for leaks (see "REFRIGERANT LEAK TEST ").
- Remove the low pressure valve from the low-pressure service port.