Operation

1. Prior to opening the refrigerant system for repairs (except compressor seizure) the system must be stabilized for correct oil replenishment.
2. Follow these procedures:
1. Engine speed set to 1,500 rpm.
2. A/C "ON".
3. Air source to recirculate
4. Blower 4th or high speed position

- Make sure the air entering the evaporator is above 26.7 °C (80 °F).
- The discharge (high) side pressure must be above 588 kPa (6 kg/sq.cm, 85 psi).

5. Operate the A/C for 10 minutes.

3. Slowly, discharge the system starting with the high-pressure side until the pressure drops below 345 kPa (3.52 kg/sq.cm, 50 psi), then open the low- pressure side.