Topping Up The Lubricating Oil: Notes
Do not mix oil types. Always use the correct type of compressor oil.
Too much lubricating oil will impair cooling. Too little lubricating oil will damage the compressor.
The oil must be topped up when repairing a leak or when replacing a component. The quantity required for the component in question will depend on whether leakage has taken place slowly or quickly.
Slow leakage (longer than 24 hours)
With a slow leak, there is normally minimal risk of oil loss.
When installing new components the following procedures apply:
Rapid leakage (e. g. hose rupture)
Rapid leakage often means that lubricating oil escapes with the refrigerant.
- When replacing components, the new components or the system (which should be filled through the service valve) must have the oil volumes given below, except for the compressor (see the "Compressor" below):
Receiver 30 cm 3 Evaporator 50 cm 3 Condenser 30 cm 3 Tube 10 cm 3 Hose 10 cm 3
Compressor
Preparatory operations for oil return
- Measure the volume of the oil drained from the compressor
- Replace the volume of drained oil according to the table below:
| Drained oil volume | Reusing the compressor | New compressor |
| More than 60% of the total oil volume | Replace the volume of drained oil with the corresponding quantity | 180cm 3 - (drained oil volume + 20cm 3) |
| Less than 60% of the total oil volume | Fill with 60% of the total oil volume in the system | Fill with 180cm 3 * 40% - 20cm 3 |
When installing a completely new system:
Check that there is oil in the compressor. The other components should contain no oil.