LT-S-L Technical manual
when it is running.
When the oil temperature is too low:
It may lead to the viscosity of the lubricant over high and insufficient oil
supply and abnormal capacity modulation and so on.
It may cause excessive liquid refrigerant dissolving in the lubricant, which
leads to severe oil being carried over, resulting in oil lacking in the system.
The lubrication effect will be influenced as well, and it will lead to the
bearing to be damaged.
When the oil temperature is too high:
The lubricant viscosity will be reduced, so the lubrication effect will be poor,
which leads to premature of bearing.
It will lead to poor cooling effect, which results in machine stop protection
due to high discharge temperature. Even more, it may cause compressor
stuck.
High temperature will accelerate the deterioration of the lubricant and
shorten the service life of the bearing. If the lubricant isn't replaced on time,
it may cause serve damage to the compressor.
Note
1）
When the compressor is running, the oil inlet temperature of should be kept
between20
℃
~60
℃
2）
When compressor stops, the oil heater needs to be switched on to make the oil
temperature above 20
℃
3）
When compressor has stopped for a long time, the oil heater can be switched off.
However, a great number of refrigerant may be dissolved in lubricant due to long
term stop, so the lubricant may be diluted in the lubricant and its viscosity is too
low. That's why the oil requires to be heated to 20
℃
before machine start.
★
Hanbell can provide the oil heater as an option
（
Refer to 10.4.4
）
.
2
）
Oil filter
The cleanliness of the lubricant is very important to the compressor. If the
welding debris or other debris enters the compressor along with the lubricant, it will
lead to the wearing of bearings or the stuck of screw rotors. Thus, Hanbell requires to
install an oil filter and it must be after the oil cooler to ensure no new debris will enter
into the lubricant once it is filtered.
