| 1. |
The HFC-134a system requires synthetic (PAG)
compressor oil whereas the R-12 system requires mineral compressor
oil. The two oils must never be
mixed. |
| 2. |
Compressor (PAG) oil varies according to
compressor model. Be sure to use oil specified for the model of
compressor. |
Handling of Oil
| 1. |
The oil should be free from moisture, dust,
metal powder, etc. |
| 2. |
Do not mix with other
oil. |
| 3. |
The water content in the oil increases when
exposed to the air. After use, seal oil from air immediately.
(HFC-134a Compressor Oil absorbs moisture very
easily.) |
| 4. |
The compressor oil must be stored in steel
containers, not in plastic
containers. |
Compressor Oil Check
The oil used to
lubricate the compressor is circulating with the refrigerant.
Whenever replacing any
component of the system or a large amount of gas leakage occurs, add oil
to maintain the original amount of oil.
Oil total volume in
system
PAG OIL : 120 ± 10cc
|
Oil Return Operation
There is close affinity
between the oil and the refrigerant.
During normal operation,
part of the oil recirculation with the refrigerant in the system. When
checking the amount of oil in the system, or replacing any component of
the system, the compressor must be run in advance for oil return
operation. The procedure is as follows:
| 1. |
Open all the doors and the engine
hood. |
| 2. |
Start the engine and air conditioning switch
to "ON" and set the blower motor control knob at its highest
position. |
| 3. |
Run the compressor for more than 20 minutes
between 800 and 1,000 rpm in order to operate the
system. |
Replacement of Component Parts
When replacing the
system component parts, supply the following amount of oil to the
component parts to be installed.
Component parts to be
installed
|
Amount of Oil
|
Evaporator
|
50 cc (1.70
fl.oz)
|
Condenser
|
30 cc (1.02
fl.oz)
|
Receiver/dryer
|
30 cc (1.02
fl.oz)
|
Refrigerant
line
(One piece)
|
10 cc (0.34
fl.oz)
|
For compressor
replacement, subtract the volume of oil drained from the removed
compressor from the specified volume, and drain the calculated volume of
oil from the new compressor:
The specified volume -
volume of removed compressor = volume to drain from the new
compressor.
|
Even if no oil is drained from the removed
compressor, don’t drain more than 50cc from new
compressor. |
