Honda Fit manuals

Honda Fit: A/C System Evacuation (With A/C)

Special Tools Required

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.

NOTE:

A more efficient way to measure moisture removal is with a special tool called a thermistor vacuum gauge, measuring vacuum levels in microns.

Connect the tool according to the manufacturers instructions, and allow the vacuum pump to run until the gauge reads 500 microns.

Shut off and isolate the vacuum pump, then observe the gauge reading:

  1. 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 station. If the system has been open for several days, the receiver/dryer should be replaced, refrigerant oil should be drained and replaced with new oil, and the system should be evacuated for several hours.

  1. Connect an R-134a refrigerant recovery/recycling/charging station (A) to the high-pressure service port (B) and the low-pressure service port (C), as shown, following the equipment manufacturer's instructions.

  2. ABC
  3. Evacuate the system. The vacuum pump should run for a minimum of 30 minutes to eliminate all moisture from the system. When the suction gauge reads -93.3 kPa   (-700 mmHg, -27.55 inHg) for at least 30 minutes, close all valves, and turn off the vacuum pump.

  4. If the suction gauge does not reach approximately -93.3 kPa   (-700 mmHg, -27.55 inHg) in 15 minutes, there is probably a large leak in the system. Partially charge the system, and check for leaks.

See also:

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