Screw Compressor i-series
viii
4.1.6.1 After Starting the Initial Operation .............................................................. 4-5
4.1.6.2 During Normal Operation ........................................................................... 4-5
4.2 Precautions for Operation ......................................................................... 4-6
4.2.1 Prevention of Liquid Flow-back ........................................................................... 4-6
4.2.2 Purging of Non-Condensable Gases ................................................................... 4-6
4.3 When Stopping the Compressor for a Long Time .................................... 4-7
Chapter 5 Maintenance and Inspection
5.1 Precautions for Maintenance and Inspection ........................................... 5-1
5.2 Maintenance and Inspection List .............................................................. 5-3
5.2.1 Daily Management ............................................................................................... 5-3
5.2.2 Periodic Inspection .............................................................................................. 5-5
5.2.3 Guidelines for Compressor Overhaul Interval ..................................................... 5-6
5.3 Compressor Disassembly Preparation ..................................................... 5-7
5.3.1 Disassembly Tools and Work Place .................................................................... 5-7
5.3.2 Replacement Parts .............................................................................................. 5-8
5.3.3 Refrigerant Gas Treatment ................................................................................ 5-10
5.3.3.1 Valves Used ............................................................................................... 5-10
5.3.3.2 Refrigerant Gas Recovery ......................................................................... 5-10
5.3.4 Removing Parts Connected to the Unit ............................................................. 5-11
5.3.5 Removing and Lifting the Compressor .............................................................. 5-11
5.3.6 Removing Oil from Compressor ........................................................................ 5-11
5.4 Disassembly and Inspection ................................................................... 5-12
5.4.1 Shaft Seal Block ................................................................................................ 5-12
5.4.1.1 Disassembly .............................................................................................. 5-12
5.4.1.2 Inspection .................................................................................................. 5-13
5.4.2 Bearing Cover .................................................................................................... 5-14
5.4.2.1 Disassembly .............................................................................................. 5-14
5.4.2.2 Inspection ................................................................................................... 5-14
5.4.3 Balance Piston ................................................................................................... 5-15
5.4.3.1 Disassembly .............................................................................................. 5-15
5.4.3.2 Inspection .................................................................................................. 5-15
5.4.4 End Cover .......................................................................................................... 5-15
5.4.5 Thrust Bearing Block ......................................................................................... 5-16
5.4.5.1 Disassembly .............................................................................................. 5-16
5.4.5.2 Inspection .................................................................................................. 5-16
5.4.6 Bearing Head ..................................................................................................... 5-17
5.4.6.1 Disassembly .............................................................................................. 5-17
5.4.6.2 Inspection .................................................................................................. 5-17
5.4.7 Rotors ................................................................................................................ 5-17
5.4.7.1 Disassembly .............................................................................................. 5-17
5.4.7.2 Inspection .................................................................................................. 5-17
5.4.8 Radial Bearings ................................................................................................. 5-18
5.4.8.1 Disassembly .............................................................................................. 5-18
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