Adding Oil
If oil was removed from the A/C system during the recovery process or during component replacement, the oil must be replenished.
Compressor systems require 270 ml (9 oz) of PAG synthetic oil. Add oil as follows when replacing the A/C system components:
Replaced Component | Oil to Add ml (oz) |
|---|---|
Accumulator | 105 (3.5) |
Compressor | 60 (2) |
Condenser | 30 (1) |
Evaporator | 90 (3) |
Charging Procedure
- Select the graduated bottle of replenishing PAG oil.
- Adjust the PAG oil bottle O-ring to the required oil charge level.
- Install the bottle on the oil injection system on the back of the unit.
- Open the valve at the top of the plastic container.
- Observe the level of oil being drawn into the system.
- Close the valve when the required oil charge has been pulled into the system.
Important: Keep the PAG oil bottle tightly capped. Do not open the oil injection valve while there is positive pressure in the A/C system. This will result in oil blow-back through the bottle vent. An A/C system vacuum is required for this operation. Do not let the oil level drop below the pick-up tube while charging or replenishing. Air will enter the A/C system.
Refrigerant Loss Due to a Large Leak
If the refrigerant charge is abruptly lost due to a large leak, approximately 90 ml (3 oz) of refrigerant oil will be carried out of the system suspended in the refrigerant. Any failure that caused an abrupt refrigerant discharge will experience this loss. Failures that allow the refrigerant to seep or bleed off over time do not experience this oil loss.
Add 90 ml (3 oz) of PAG oil after replacement of a component that caused a large leak plus the amount as listed in the table above for the component being replaced. Add the oil directly to the replaced component, if possible. If the oil cannot be added easily to the replacement part, add the oil to the receiver dehydrator.
Compressor System
Up to 120 ml (4 oz) of refrigerant oil can collect in the crankcase. Therefore, it is important when replacing the compressor that the oil in the old compressor crankcase can be drained and measured. Discard the oil after recording the amount. All replacement compressors will be shipped with approximately 240 ml (8 oz) of oil in the crankcase. The oil must be drained and retained. Replace the oil in the same amount as previously recorded from the old compressor.
