LT-S-(L) Technical manual
serious damage to the compressor
2
）
Do not mix different brands of lubricants, otherwise they may cause serious
damage to the compressor. Pay attention to it when replacing lubricating oil for
the system.
4.2
The Replacement of Lubricant
4.3.1
Oil Change Schedule
1
）
Check lubricant every 10,000 hours after continuous running. For the first
operation of the compressor, it is recommended to change the oil and clean the
external oil filter after running 2,000 hours. Check the system whether clean or
not and then change oil every 20,000 hours or after 4 years continuous running if
the system operates in good condition.
2
）
The oil will deteriorate if the compressor runs at high discharging temperature
(above 95
℃
) in the long term. Please avoid this situation, but if it’s necessary to
run in this condition, please shorten the intervals of oil changing.
4.3.2
Pre-cautions for changing oil
1
）
It is recommended to check the quality of oil periodically in order to maintain the
lubrication performance.
2
）
The lubricant absorbs moisture in the air. Avoid to expose it to the air for a long
time
If the compressor motor is burned, the acid and harmful substances and burned
debris will be brought into the system. Therefore, the oil filters and lubricants
must be replaced repeatedly. It is suggested to replace the lubricating oil again
after 72 hours of operation until the quality of the lubricating oil in the system
returns to standard valve.
3
）
The foreign body in the oil will block the oil line, so it is necessary to install an oil
filter in the external oil line. Also, the pressure differential sensor need to be
installed before and after the oil filter. If the pressure differential valve between
these two sensors reaches 1.5 bar, the oil filter need to be changed.
4
）
The acidity of oil will directly affect the life of the motor, and it is recommended
to change the oil when PH≤6. (Please also change the filter drier at the same time
to make sure the system is dry.
）
5
）
It is important to replace the oil, especially when the motor is burnt because the
acidity remains in the system. By replacing the oil can help check the status of the
