Filling and adjustment of compressor oil
| Filling and adjustment of compressor oil |
The AC system is filled with 200 ml of compressor oil. A certain amount of compressor oil is always lost in connection with the draining of refrigerant and replacement of components. This amount must be filled up again so that the operation of the system will not be adversely affected.
Filling of compressor oil should be carried out on the compressor's high-pressure side. Compressor oil is supplied in tubes of 20 ml.
The table below shows how much compressor oil is lost in connection with various types of work on the AC system.
|
Reason for loss of oil
|
Amount of oil lost
|
|
Draining of refrigerant
|
20 ml
|
|
Burst AC hose
|
40 ml
|
|
Replacement of hose
|
20 ml
|
|
Replacement of condenser
|
40 ml
|
|
Replacement of evaporator
|
40 ml
|
|
Replacement of receiver
|
40 ml
|
|
Replacement of expansion valve
|
20 ml
|
|
Replacing compressor*
|
70 ml *
|
* Note that the new compressor contains 200 ml of oil when delivered. In order to avoid getting too much oil in the A/C system, and thereby reducing cooling performance, the oil must be drained before the compressor is fitted. How much needs to be drained depends on how much oil that has been lost in conjunction with any eventual other component replacements. The A/C system must always contain 200 ml of compressor oil.
If a new compressor only is to be fitted, drain 110 ml of oil from it (200 - 70 - 20 = 110). For example, if you also fit a new receiver, only 70 ml should be drained from the compressor, as shown in the following example:
|
200 ml
|
(in a new compressor)
|
|
- 20 ml
|
(lost during draining)
|
|
- 40 ml
|
(lost when fitting a new receiver)
|
|
- 70 ml
|
(lost when fitting a new compressor)
|
|
|
|
|
70 ml
|
(to be drained from the new compressor)
|
This project is supported by memberships and donations. If you use this site, please consider Joining SCNA and/or making a donation.
Our Friends
