2200M4JE-HO-iS2-N_2014.04.
Chapter 5 Maintenance and Inspection
Screw Compressor i-series
5.2 Maintenance and Inspection List
5-4
5.2.2 Periodic
Inspection
Check the following items at specified intervals.
In addition, regarding other related items such as any safety devices, gas leak detectors, or other utility
(gas/electricity) protection devices that constitute the cooling system together with the compressor,
even if they are not directly connected to the compressor, any regulatory requirements that require
inspection and recording of the results must be observed according to the instructions provided.
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 Safty 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.
Lubricant
Replace after 500 hours from the initial
operation.
Analyze oil every 6 months.
When the analysis results do not
meet the management criteria
provided in "5.3 Management of
Lubricant" of this manual, replace
oil.
Oil filter
Replace lubricant once per year.
Replace oil filter when the pressure
difference between the discharge
pressure and oil supply pressure
exceeds 0.15 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.
Coupling
Check once per year or per 8,000
operating hours.
■
Inspection frequency is the specified period after delivery or operating hours, whichever comes first.
