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2. For the chiller system using synthetic oil, make sure not to expose the oil to atmosphere for a long time. It is
necessary to vacuum the system completely when installing the compressor.
3. If the customer wants to use special type of oil, confirm with the compressor manufacturer is necessary.
4. In order to vaporize the water in the system, it is suggested to heat the system and vacuum the system as long
as possible after changing of new oil in the system
5. If the system encounters a compressor motor burned, the acidity debris will remain inside the system, so follow
the procedures mentioned above to overhaul the system is necessary. It is also important to check the oil acidity
after 72 hours operation and change it again until the oil acidity is within the standard value.
4.2 Changing of oil
Lubrication oil is one of the most important factor to the compressor system in order to maintain the good
operation, lubrication, cooling, sealing and capacity control. The following points should be taken into
consideration to ensure good oil management.
1. Oil contamination caused by debris or swarf might clog the oil filter and cause compressor bearing failure. In
order to prevent the clogging of oil filter, an optional pressure differential switch is recommended to be installed.
The switch will trip when the oil pressure differential reaches the setting point. The compressor will shut down
automatically to prevent the bearing away from getting damage by lacking of lubrication.
2. Acidified system due to the moisture will cause
the reduction of bearing and motor’s life. Check the oil acidity
periodically and change the oil if the oil acidity value is lower than PH6. Change the deteriorated dryer periodically
if possible to keep the system dryness. Refer to the oil changing procedure especially after overhauling the
system due to motor burned out, check the oil quality monthly or periodically and change the oil if the oil is out of
standard specs. It is necessary to take care of the oil quality and system cleanliness and dryness periodically.
3. Compressor running at high discharge temperature for a long time will cause the change of oil property and
short the bearing life. If the compressor
’s discharge temperature keeps at high stage (approaching the critical
point) then the oil will spoil gradually in a short time. Check the oil characteristic every 2 months if possible. It is
necessary to change the oil if the characteristics of the oil are out of the specification. In case if the oil
characteristics cannot be checked periodically, change the oil after 1 years of operation. For the first operation of
the compressor, it is recommended to check oil and clean oil filter after running 200 hours. Because the piping
debris or swarf could be accumulated inside the system after continuous operation, it is necessary to check the oil
after 2,000 hours or after 6 months of running. Good oil management can ensure the system operating under
good condition.
Summary of Contents for RC2-F Series
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