Refrigerant System Charge

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 charging can may cause it to explode.

1. Attach center hose from manifold gauge set to refrigerant dispensing manifold. Turn refrigerant manifold valves completely counterclockwise to open fully, and remove protective caps from refrigerant manifold.
2. Screw refrigerant cans into manifold. Ensure gasket is in place and in good condition. Torque can and manifold nuts to 6-8 ft. lbs.
3. Turn refrigerant manifold valves clockwise to puncture cans, and close manifold valves.
4. Loosen charging hose at gauge set manifold and turn a refrigerant valve counterclockwise to release refrigerant and purge air from charging hose. When refrigerant gas escapes from loose connection, retighten hose.
5. Fully open all refrigerant manifold valves being used and place refrigerant cans into pan of hot water at 125°F to aid transfer of refrigerant gas. Do not heat refrigerant cans over 125°F as they may explode. Place water pan and refrigerant cans on scale and note weight.
6. Start engine and turn A/C On, then index blower switch to low position.
7. Low pressure cutout switch will prevent clutch from engaging until refrigerant is added to system. If clutch does engage, replace switch before continuing.
8. Charge through suction side of system by slowly opening suction manifold valve. Adjust valve so charging pressure does not exceed 50 psi.
9. Adjust engine speed to fast idle of 1400-1550 RPM.
10. After specified refrigerant charge has entered system, close gauge set manifold valves and refrigerant manifold valves, then reconnect wiring.