Screw Compressor i-series
ix
5.4.8.2 Inspection .................................................................................................. 5-18
5.4.9 Suction Strainer and Check Valve ..................................................................... 5-18
5.4.9.1a Disassembly (i125*) ................................................................................... 5-18
5.4.9.1b Disassembly (i160*) ................................................................................... 5-18
5.4.9.2 Inspection .................................................................................................. 5-19
5.4.10 Unloader ............................................................................................................ 5-19
5.4.10.1 Disassembly .............................................................................................. 5-19
5.4.10.2 Inspection .................................................................................................. 5-19
5.5 Reassembly .............................................................................................. 5-20
5.5.1 Unloader ............................................................................................................ 5-21
5.5.2 Rotor and Inner Race of Radial Bearing ............................................................ 5-21
5.5.3 Bearing Head ..................................................................................................... 5-22
5.5.4 Outer Race of Radial Bearing ............................................................................ 5-22
5.5.5 Suction Strainer and Check Valve ..................................................................... 5-23
5.5.5.1 i125*........................................................................................................... 5-23
5.5.5.2 i160*........................................................................................................... 5-23
5.5.6 Adjustment of Thrust Bearing and End Clearance ............................................ 5-24
5.5.6.1 End Clearance Measurement .................................................................... 5-26
5.5.6.2 End Clearance Adjustment ........................................................................ 5-27
5.5.6.3 Tightening after End Clearance Adjustment .............................................. 5-27
5.5.7 Balance Piston ................................................................................................... 5-28
5.5.8 Bearing Cover .................................................................................................... 5-28
5.5.9 Shaft Seal Block ................................................................................................ 5-29
5.5.10 End Cover .......................................................................................................... 5-31
Chapter 6 Troubleshooting
01: Compressor does not start up ................................................................................ 6-1
02: Compressor stops immediately after startup .......................................................... 6-1
03: Abnormally low pressure (decrease of suction pressure) ...................................... 6-2
04: Low oil pressure (low oil supply pressure) ............................................................. 6-2
05: Abnormally high pressure (abnormal discharge pressure) .................................... 6-3
06: Discharge temperature is abnormally high ............................................................. 6-4
07: Leak from mechanical seal part ............................................................................. 6-6
08: Squeaking sound from mechanical seal ................................................................ 6-6
09: Capacity control malfunction .................................................................................. 6-6
10: Compressor generates abnormal vibration and/or sound ...................................... 6-6
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