A/C System Charge

Charging A/C System:

1. With the handles turned in all the way (valve closed), install the adaptor valve to the low-pressure side of the gauge manifold.
2. Connect the charging hose (blue) to the adaptor valve.
3. Connect the quick joint (for low-pressure) to the charging hose (blue).
4. Connect the quick joint (for low-pressure) to the low-pressure service valve.

NOTE: The low-pressure service valve should be connected to the suction hose.

CAUTIONS:
- Use tools that are designed for R-134a.
- To install the quick joint, press section A against the service valve until a click is heard.
- When connecting, run your hand along the hose while pressing to ensure that there are no bends in the hose.

5. Close the high and low-pressure valves of the gauge manifold.
6. Install the vacuum pump adaptor to the vacuum pump.
7. Connect the vacuum pump plug to the vacuum pump adaptor.
8. Connect the charging hose (yellow) to the R-134a connection port of the vacuum pump adaptor.
9. Tighten the adaptor valve handle (valve open).
10. Open the low-pressure valve of the gauge manifold.
11. Turn the power switch of the vacuum pump to the ON position.

NOTE: Even if the vacuum pump power switch is turned ON, the vacuum pump will not operate because of the power supply connection in step (7).

Charging A/C System:

12. Turn the vacuum pump adaptor switch to the R-134a side to start the vacuum pump.

CAUTION: Do not operate the NC compressor during evacuation.

13. Evacuate to a vacuum reading of 100 kPa (29.5 in Hg) or higher (takes approx. 10 minutes).
14. Turn the vacuum pump adaptor switch OFF and allow to stand it for 5 minutes.

CAUTION: Do not operate the compressor in the vacuum condition; damage may occur.

15. Carry out a leak test. (Good if the negative pressure does not drop.)

CAUTION: If the negative pressure (vacuum) is lost, check for loose connections. Then, repeat the evacuation procedure from step 12. If negative pressure (vacuum) is still lost, add 1 lb of refrigerant and check system using an R-134a compatible leak detector.

Charging A/C System:

16. Turn the handle of the adaptor valve back all the way (valve closed), remove it from the gauge manifold and install the service can.
17. Open the valve of the bulk container.

Charging A/C System:

18. Tighten the handle of the adaptor valve (valve open) to charge the system with refrigerant.

CAUTION: Always keep the bulk container upright. If it is turned upside down, the compressor may be damaged by liquid refrigerant.

19. If the refrigerant is not drawn in, turn the handle of the adaptor valve back all the way (valve closed).
20. Check for gas leaks using a leak detector.
- If a gas leak is detected, re-tighten the connections, and then repeat the charging procedure from evacuation in step (12).

CAUTION: Use a leak detector that is designed for R-134a.

21. Start the engine.
22. Operate the A/C and set to the lowest temperature (MAX. COOL).
23. Fix the engine speed at 1,500 rpm.
24. Tighten the handle of the adaptor valve (valve open) to charge the required volume of refrigerant.

CAUTION: Always keep the bulk container upright. If it is turned upside down, the compressor may be damaged by liquid refrigerant.

25. After charging with refrigerant, turn the handle of the adaptor valve back all the way (valve closed).
26. Tighten the charging valve handle (valve closed). Remove the quick joint (for low-pressure) from the low pressure service valve.