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AIR CONDITIONING - L.H. R.H. STEERING C H A R G I N G AND TESTING E Q U I P M E N T Connecting the gauge set NOTE 1: There are two methods of connecting the or charging with liquid refrigerant’ also applies to ‘pressure test’ and ‘compressor oil level NOTE 2: Various types of charge and test equipment are available depending upon the manufacturer chosen test equipment used in their workshop. -NOTE: The boxed instructions in the following procedure refer to compressors with STEM type All other instructions refer to SCHRADER type valves. Fitting 1. Ensure that all the valves on the charging and testing equipment are closed. Control valves on the particular equipment selected are numbered 1 to 4 The sequence may vary on other proprietary equipment. 2. Mount a (25 Ib) drum of refrigerant upside down on the support at the rear of the charging equipment, and secure with the strap. ST 6. Place the vehicle in a ventilated area away from open flames and heat sources. Stop the engine, 7. Check that both service valves are fully opcn (turned anti-clockwise). 8. Put on the safety goggles. the service ports. 10. Coat the threads and flares with refrigerant oil. line (blue) valve No. 1 to the comprcssor suction service port. 12. Connect the high pressure charging from valve No. 2 to the compressor discharge scrvicc 13. Using the service wrench, turn the suction service valve stem ‘clockwise’ counting the number of turns necessary to close the valve. 1 ST ST 1412 3. Connect the hose from the bottom of the charging cylinder to the refrigerant drum valve. of the charging cylinder and the refrigerant control valve 5. Connect the hose between the vacuum pump valve 14. After the valve is fully closed, turn the stem out (anti-clockwise) half the number of turns counted, this should position t h e valve seat in the mid (test) position. 11 (No. 4). and the vacuum control valve (No. 3). |