Charging the System
Charging with Freon Recovery and Recycling System1. With the manifold gauge set valve closed to the center hose, disconnect the vacuum pump from the manifold gauge set.
2. Connect the center hose of the manifold gauge set to a charging cylinder or refrigerant tank.
3. Loosen the center hose at the manifold gauge set and open the charging cylinder or refrigerant drum valve. Allow refrigerant to escape to purge air and moisture from the center hose. Then, tighten the center hose connection at the manifold gauge set.
4. Open the manifold gauge set low side valve to allow refrigerant to enter the system.
5. When no more refrigerant is being drawn into the system, start the engine and move the function selector lever to VENT/HEAT/A/C position. Move the blower switch to HI to draw the remaining refrigerant into the system.
Continue to add refrigerant to the system until the specified weight of R-134a is in the system. Then, close the manifold gauge set low pressure valve and the refrigerant supply valve.
6. Operate the system until the pressures stabilize to verify normal operation and system pressures.
7. In high ambient temperatures, it may be necessary to operate a high volume fan positioned to blow air through the radiator and condenser to aid in cooling the engine and prevent excessive refrigerant system pressures.
8. When charging is completed and system operating pressures are normal, disconnect the manifold gauge set from the vehicle. Install protective caps on the service gauge port valves.