Daily Maintenance Items
1. Lubrication oil level
When the oil level in the oil separator reaches the lower limit, charge lubricating oil.
2. Replacing oil filter element
When the pressure difference between the inlet and out let ports of the oil filter exceeds 0.1 MPa,
replace the oil filter element.
At the beginning of the operation, the differential pressure of the oil filter may increase quickly.
3. Cleaning of suction strainer
When the compressor operating hours exceeds 500 hours, check the suction strainer. If a
temporary filter is installed for the initial stage of operation, remove it.
At the beginning of the operation or after periodical check, the pressure difference between the
front and back of the suction strainer may increase quickly. If the differential pressure becomes
large, check and clean the suction strainer.
4. Lubricating oil leak rate from mechanical seal
If much oil leaks from the mechanical seal, determine the leak rate per hour. The following table
shows guidelines for allowable leak rate and the rate at which inspection must be done.
If any problem (damage, etc.) is found in mechanical seal, replace the mechanical seal assembly.
Table 5-2
Guideline for Leak from Mechanical Seal Section
Note: The specifications above are just guidelines. They are not guaranteed values.
5. Contamination on the cooling water side of the cooling pipes of condenser and oil cooler
Clogging and contamination of the cooling pipe is largely affected by the quality of cooling water.
When the oil temperature and discharge pressure gradually rise during the initial stage of
operation, inspect and clean the cooling water side of oil cooler and condenser even when the
time has not yet come at which inspection must be done.
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