Charging A/C System

1. With the handles turned back 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 low pressure hose.

CAUTION: Use tools that are designed for R-134a.

CAUTION: To install the quick joint, press section A firmly 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).

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




CAUTION: Do not operate the A/C 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.




16. With the handle turned out all the way (valve open), install the charging valve to the service can.
17. Turn the handle of the adaptor valve back all the way (valve closed), remove it from the gauge manifold and install the service can.
18. Tighten the handle of the charging valve (valve closed) to puncture the service can.




19. Turn the handle of the charging valve back (valve open) and tighten the handle of the adaptor valve (valve open) to charge the system with refrigerant.

CAUTION: If the service can is inverted, liquid refrigerant may be drawn into the compressor damaging it by liquid compression. Keep the service can upright to ensure that refrigerant is charged in gas state.

20. If the refrigerant is not drawn in, turn the handle of the adaptor valve back all the way (valve closed).
21. 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: A leak detector designed for R-134a should be used.

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

CAUTION: If the service can is inverted, liquid refrigerant may be drawn into the compressor damaging it by liquid compression. Keep the service can upright to ensure that refrigerant is charged in gas state.

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

NOTE: If the service can is not emptied completely, keep the handles of the charging valve and adaptor valve closed for the next charging.

CORRECTING LOW REFRIGERANT LEVEL IN CASE THE SERVICE CAN IS USED




1. Install the charge valve with the handle turned all the way out (valve open) of the service can.
2. Install the adaptor value with the handle turned all the way back (valve close) to the charging valve.
3. Connect the charging hose (blue) to the adaptor valve.
4. Connect the charging hose (blue) to the quick joint (for low pressure).
5. Tighten the handle of the charge valve (valve close), and pierce the service can.
6. Turn the handle of the adaptor valve to bleed the air.




7. Install the quick joint (for low pressure) to the low pressure service valve.

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




8. Start the engine.
9. Operate the air conditioner and set at the lowest temperature (MAX. COOL).
10. Fix the engine speed at 1,500 rpm.
11. Tighten the handle of the adaptor valve (valve open), and replenish refrigerant checking the quantity through the sight glass.

CAUTION: If the service can is inverted, liquid refrigerant may be draw into the compressor damaging it by liquid compression. Keep the service can upright to ensure that refrigerant is charged in gas state.

12. After replenishing is completed, turn the handle of the adaptor valve all the way back (valve close), and remove the quick joint.

NOTE: If any refrigerant is remaining in the service can, close the adapter valve and save the refrigerant for another vehicle. Do not release into the atmosphere.

METHOD BY USING REFRIGERANT RECOVERY AND RECYCLING UNIT
Using the refrigerant recovery and recycling unit, refill the refrigerant.

NOTE: Refer to that Refrigerant Recovery and Recycling Unit Instruction Manual for operation of the unit

DISCHARGING SYSTEM
Use the refrigerant recovery unit to discharge refrigerant gas from the system.

NOTE: Refer to that Refrigerant Recovery and Recycling Unit Instruction Manual for operation of the unit