Hanbell RC2-D, Technical Manual

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RC2-D Technical Manual
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6.2 Pre-cautions for changing oil
1. User should choose the oil with quality certification, and different brands of oil shall not be mixed.
Different kinds of refrigerants should correspond to different lubricating oils, and special
attention should be paid to the incompatibility between synthetic oil and mineral oil. Make sure
the system is clean and free of welding slag and other impurities before oil filling.
2. Synthetic oil should be used in the water chiller to ensure that the oil is not exposed to the
atmosphere for a long time, and the system should be thoroughly vacuumized at the initial
start-up
3. In order to dehumidify the system, it is suggested that dry nitrogen should be introduced into the
system for drying, and then vacuum treatment should be carried out. When vacuumizing the
system, it should be considered that the low-pressure water vapor will evaporate. At this time,
part of dry nitrogen should be refilled into the system. In addition, it is also very important for
the system to replace the new oil, especially after the motor is burned down, the acid residue
remains in the system. The acidity of the system lubricating oil can be checked by changing the
oil, and the lubricating oil can be changed again after 72 hours of operation until the acidity of
the lubricating oil reaches the standard value
.
4. When filling the lubricating oil, it is necessary to ensure that the total amount of lubricating oil in
the system reaches the filling quantity required by Hanbell.
6.3 The Replacement of Lubricanting oil
1. Check the oil 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. It is necessary to avoid solid residues and metal impurities passing through the oil filter as these
impurities may cause bearing damage. In order to prevent bearing damage in this case, it is
recommended to install a pressure difference switch (optional). When the differential pressure on
both sides of the oil filter reaches the set value, the switch will act to shut down the system.