Refrigerant System Charge

Fig. 10 Complete Charging Of System:

Never use cans to charge into high pressure side of system (compressor discharge port) or into system at high temperature, as high system pressure transferred into can may cause it to explode.
1. Attach center hose from manifold gauge set to refrigerant dispensing manifold. Turn refrigerant manifold valve completely counterclockwise to open fully, and remove protective cap from refrigerant manifold.
2. Screw refrigerant can into refrigerant manifold, ensuring gasket is in place and in good condition.
3. Turn refrigerant manifold valve clockwise to puncture can, and close manifold valve.
4. Loosen charging hose at gauge set manifold and turn refrigerant manifold valve counterclockwise to release refrigerant and purge air from charging hose. When refrigerant gas escapes from loose connection, tighten hose.
5. Fully open refrigerant manifold valve and place refrigerant can into pan of hot water (125°F or lower) to aid transfer of refrigerant gas. Do not heat refrigerant cans over 125°F as they may explode. Place water pan and refrigerant can on scale and note weight.
6. Connect a jumper wire across cycling clutch switch terminals.
7. Open Manifold gauge low side valve and allow refrigerant to be drawn into system.
8. When no more refrigerant is being drawn into system, start engine and set controls to Max A/C, then select the high blower position.
9. Allow remaining refrigerant to be drawn into system, then close the manifold low side valve and refrigerant supply valve.
10. Remove jumper wire from clutch cycling pressure switch, then reconnect connector.
11. Operate system until pressures stabilize and normal operation is verified.