Acura CSX. Manual — part 494

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21-90

Climate Control

Refrigerant Recovery

A

C

B

• 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:

• If accidental system discharge occurs, ventilate the

work area before resuming service.

• Additional health and safety information may be

obtained from the refrigerant and lubricant
manufacturers.

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. Measure the amount of refrigerant oil removed

from the A/C system after the recovery process is
completed. Be sure to put the same amount of new
refrigerant oil back into the A/C system before
charging.

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21-91

System Evacuation

A

C

B

• 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:

• If accidental system discharge occurs, ventilate the

work area before resuming service.

• Additional health and safety information may be

obtained from the refrigerant and lubricant
manufacturers.

• Do not allow moisture to contaminate the A/C system

oil. Moisture in the oil is difficult to remove, and it can
damage the A/C compressor.

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, recover the refrigerant, if any,
from the A/C system (see page 21-90). And the
system should be evacuated for several hours.

2. 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. Recover the refrigerant, if any, from
the A/C system (see page 21-90).

3. Evacuate the system. The vacuum pump should

run for a minimum of 45 minutes to eliminate all
moisture from the system. When the suction gauge
reads

93.3 kPa (700 mmHg, 27.6 in.Hg) for at least

45 minutes, close all valves, and turn off the
vacuum pump.

4. If the suction gauge does not reach approximately

93.3 kPa (700 mmHg, 27.6 in.Hg) in 15 minutes,

there is probably a leak in the system. Partially
charge the system, and check for leaks (see page
21-93).

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Refrigerant Capacity:
400 to 450 g
0.40 to 0.45 kg
0.9 to 1.0 lbs
14.1 to 15.9 oz

21-92

Climate Control

System Charging

A

C

B

• 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:

• If accidental system discharge occurs, ventilate the

work area before resuming service.

• Additional health and safety information may be

obtained from the refrigerant and lubricant
manufacturers.

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. Recover the refrigerant in the A/C system (see page

21-90).

3. Evacuate the system (see page 21-91). If the system

cannot reach a vacuum of

93.3 kPa (700 mmHg,

27.6 in.Hg) in 15 minutes, or cannot hold a vacuum
for at least 15 minutes, there is probably a leak. Do
the Refrigerant Leak Check (see page 21-93), and
repair any leaks before charging the system.

4. Add the same amount of new refrigerant oil to the

system that was removed during recovery. Use
only SP-10 refrigerant oil.

5. Charge the system with the specified amount of

R-134a refrigerant. Do not overcharge the system;
the A/C compressor will be damaged.

Select the appropriate units of measure for your
refrigerant charging station.

6. Check for refrigerant leaks (see page 21-93).

7. Check the system performance (see page 21-99).

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Special Tools Required

Leak Detector Usage Tips (Refer to the
Operator’s Manual for complete operating
instructions)

21-93

Refrigerant Leak Check

• Leak detector YGK-H-10PM
• Leak detector HLD-100
• Leak detector TIFZX-1, or commercially available
• OPTIMAX Jr. A/C Leak Detection Kit (TRP124893)
These tools are available through the Honda Tool and
Equipment Program; call 888-424-6857

• 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:

• If accidental system discharge occurs, ventilate the

work area before resuming service.

• Additional health and safety information may be

obtained from the refrigerant and lubricant
manufacturers.

• Check the system for leaks using an R-134a

refrigerant leak detector with an accuracy of 14 g
(0.5 oz) per year or better.

• Position the vehicle in a wind-free work area. This will

aid in detecting small leaks.

• When using the leak detector for the first time, allow

it to warm up for 2 minutes with the probe in a clean
atmosphere. This lets the temperature sensor in the
detector stabilize.

• The calibration check should be done in the

‘‘Search 2’’ mode. Once that is done, the other check
modes do not need calibrating.

• When leak checking through the HVAC module drain

hose, avoid drawing water into the probe. Water can
damage the internal pump and sensor.

• Avoid creasing the flexible probe extension. Creases

can restrict air flow and give false readings.

• Because the detector recalibrates itself for ambient

gases, it may be necessary to move the detector
away from the leak to clear the sensor. Once the
sensor has cleared, recheck the suspected leak.

• When removing the clear probe tip, be careful not to

lose the flow ball.

• R-134a is heavier than air; always check below and to

the sides of all potential leak sources.

• Halogen leak detectors are sensitive to chemicals:

windshield washing solutions, solvents/cleaners, and
some vehicle adhesives. Keep these chemicals out of
the area when doing leak detection.

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