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A IR CONDITIONING - L . H. R . H. STEERING 13. Crack the suction valve charging line at t h e service port on the compressor to allow an escape of sight glass in the charging cylinder. A slight drop in the level should be before closing the connection at the compressor. 14. Close the high pressure valve (No. 2 ) . Close valve No. 3. 16. Close the valve at the top of the charging cylinder. 14-10 ST 17. charging and testing equipment, as described for evacuating and evacuate the air conditioning system. 18. Maintain the vacuum for twenty minutes. The air conditioning system is now ready for charging with refrigerant. Charging CAUTION: Do not charge liquid refrigerant into the is operated. Fit the charging and testing equipment 2 . Evacuate the air conditioning system allowing (2.2 Ib) of refrigerant to enter the charging 3. Put on safety goggles. 4. Close the low pressure valve (No. 1). 5 . Open the refrigerant control valve (No. 4) and release liquid refrigerant into the system through pressure in the system will eventually balance. 6. If the full charge of (2.2 Ib) of liquid refrigerant will not enter the system, then close the (No. 2) and open the low pressure valve (No. ensuring that the low pressure gauge does not exceed 40 psi. 7. Start and run the engine at 1,000-1,500 and allow refrigerant to be drawn though the low (No. 1) until the full charge of 1,0 (2.2 has been drawn into the system. 8. Close valve No. 1. 4-6 ST 9. Check the air conditioning system is operating satisfactorily by carrying out a prcssurc test, as in the Section. CAUTION: Do not overcharge the air conditioning Leak test The following instructions refer to an electronic type refrigerant leak detector which is the safest, most 1. Place vehicle in a well ventilated arca but free from draughts, as leakage from the system could be dissipated without detection. 2. Follow the instructions issued by the manufacturer of t h e particular leak detector being Certain have visual and audible indicators. 3 . Commence searching for leaks by passing the aii components, particularly on the underside, as the refrigerant gas is heavier than air. 4. Insert t h e probe into an air outlet of the evaporator. Switch the air conditioning blower on of ten seconds. Any leaking refrigerant will be gathered in by the blower and detected. 15 |