mycom i160S - Page 72

2203M4JE-MY-iS2-N_2017.04.
Chapter 5 Maintenance and Inspection
Screw Compressor i-series
5.2 Maintenance and Inspection List
5-5
5.2.2 Periodic Inspection
Check the following items at specified intervals.
In addition, observe relevant laws and regulations on the inspections and recording of the results that
are provided for other related items such as any safety devices (e.g. gas leak detectors), or other utility
(gas/electricity) protection devices that constitute the cooling package unit together with the
compressor.
Table 5-3
Periodical Inspection Items
Item Inspection Interval Remarks
Pressure gauge/
pressure sensor
Once per year
Temperature/
temperature sensor
Once per year
Protection devices
and Safety valves
Operation test and clean once per year
Suction strainer
Check after 500 hours from the initial
operation.
If the pressure difference between
the front and back of the suction
strainer increases, check and clean
the suction strainer.
Check and clean once per year.
Lubricating oil
Analyze oil after 500 hours from the
initial operation.
When the analysis results do not
satisfy the management criteria
provided in Chapter 4 Section
4.1.5, replace oil.
Analyze oil every 6 months.
Oil filter element
Replace once per year.
Replace oil filter element if the
differential pressure between the
inlet and outlet ports of the oil filter
exceeds 0.1 MPa.
Cooling water side of
oil cooler
Once per year
Clean if excessively contaminated.
Cooling water side of
condenser
Once per year
Clean if excessively contaminated.
Mechanical seal
section
Check once per year or per 8,000
operating hours.
To be replaced if any abnormality is
found.
If it is difficult to stop the
compressor operation except for
scheduled inspections, replace the
mechanical seal assembly at each
inspection.
■ Inspection frequency is the specified period after delivery or operating hours, whichever comes first.